巴西专利BR102015011521B1 linear compressor

专利PDF首页>>巴西专利

专利附录

专利说明

权利要求

类似技术

同族专利

引用文献

法律状态

优先权

专利摘要:
linear compressor. a linear compressor is provided. the linear compressor may include a housing including a suction inlet, a cylinder provided in the housing to define a compression space for a refrigerant, a piston reciprocally moved in an axial direction within the cylinder, a relief valve provided in a side of the cylinder for selectively discharging the compressed refrigerant into the compression space, at least one nozzle arranged in the cylinder for introducing at least a part of the discharged refrigerant through the discharge valve into the cylinder, and a passage for guiding the discharged refrigerant -cattle from the discharge valve to the at least one nozzle.
公开号:BR102015011521B1
申请号:R102015011521-0
申请日:2015-05-19
公开日:2022-01-25
发明作者:Junghae Kim；Kyoungkyu LEE；KwangWoon Ahn
申请人:Lg Electronics Inc；
IPC主号:

专利说明:

BACKGROUND OF THE INVENTION 1. Field of Invention
[001] A linear compressor is revealed here. 2. Background of the Invention
[002] In general, compressors are machines that receive energy from a power generating device such as an electric motor or turbine to compress air, a refrigerant or various working gases, thereby increasing pressure. Compressors are widely used in home appliances, such as refrigerators or air conditioners, or in industrial segments.
[003] It is possible to broadly classify compressors into reciprocating compressors, in which a compression space, into which a working gas is drawn in and from which it is discharged, is defined between a piston and a cylinder to allow the piston is moved alternately in a linear fashion in the cylinder, thus compressing the working gas; rotary compressors, in which a compression space, into which a working gas is drawn in and from which it is discharged, is defined between an eccentrically rotating roller and a cylinder to allow the roller to rotate eccentrically along of an inner wall of the cylinder, thus compressing the working gas; and scroll compressors, in which a compression space, into which a working gas is drawn in and from which it is discharged, is defined between an orbiting scroll and a fixed scroll to compress the working gas while the orbiting scroll rotates along the along the fixed spiral. In recent years, a linear compressor, which is directly connected to a drive motor, in which a piston is alternately moved linearly, to improve compression efficiency without mechanical losses due to motion conversion, and which has a simple structure , has been developed on a large scale.
[004] The linear compressor can draw in and compress a working gas, such as a refrigerant, while the piston is moved alternately in a linear manner in a sealed housing by a linear motor, and then discharge the working gas. The linear motor may include a permanent magnet disposed between an inner stator and an outer stator. The permanent magnet can be moved alternately in a linear fashion by an electromagnetic force between the permanent magnet and the inner (or outer) stator. Since the permanent magnet operates in a state in which the permanent magnet is connected to the piston, a refrigerant can be sucked in and compressed while the piston is alternately moved linearly within the cylinder, and then it can be discharged. The present Applicant filed a patent (hereinafter referred to as “prior document”) and then filed the patent with respect to the linear compressor, as Korean.
[005] Patent No. 10-1307688, filed September 5, 2013, and entitled “linear compressor”, which is hereby incorporated by reference. The linear compressor according to the prior art document includes a housing that accommodates a plurality of components. The vertical height of the housing can be quite high, as illustrated in the prior art document. An oil supply assembly for supplying oil between a cylinder and a piston may be arranged within the housing.
[006] When the linear compressor is provided in a refrigerator, the linear compressor may be arranged in a machine chamber provided on the rear side of the refrigerator. In recent years, the main concern of consumers is to increase the internal storage space of the refrigerator. To increase the internal storage space of the refrigerator, it may be necessary to reduce the volume of the engine room. To reduce the volume of the engine room, it may be important to reduce the size of the linear compressor.
[007] However, since the linear compressor disclosed in the prior art document has a relatively large volume, the linear compressor is not suitable for a refrigerator, for which a larger internal storage space is sought. To reduce the size of the linear compressor, it may be necessary to reduce the size of a major component of the compressor. In this case, compressor performance may be impaired.
[008] To compensate for worse compressor performance, it may be necessary to increase the compressor drive frequency. However, the more the compressor activation frequency is increased, the greater the friction force due to the oil circulating in the compressor, impairing the compressor's performance. BRIEF DESCRIPTION OF THE DRAWINGS
[009] Embodiments will be described in detail with references to the following drawings, in which reference numerals refer to similar elements, and in which:
[010] Fig. 1 is a schematic diagram of a refrigerator according to one embodiment;
[011] Fig. 2 is a cross-sectional view of a cooler dryer according to one embodiment;
[012] Fig. 3 is a cross-sectional view of a linear compressor according to one embodiment;
[013] Fig. 4 is a cross-sectional view of a suction silencer according to one embodiment;
[014] Fig. 5 is a view illustrating a position of a first filter coupled to the suction silencer according to one embodiment.
[015] Fig. 6 is a view illustrating components around a compression chamber according to one embodiment;
[016] Fig. 7 is an exploded perspective view of a coupled state between a cylinder and a frame according to one embodiment;
[017] Fig. 8 is an exploded perspective view of the cylinder and frame according to one embodiment;
[018] Fig. 9 is an exploded perspective view of the frame according to one embodiment;
[019] Fig. 10 is a cross-sectional view illustrating a state in which the cylinder and piston are coupled together in accordance with one embodiment;
[020] Fig. 11 is a view of the cylinder according to one embodiment;
[021] Fig. 12 is an enlarged cross-sectional view of part A of Fig. 10;
[022] Fig. 13 is a cross-sectional view illustrating a state in which the cylinder and piston are coupled together in accordance with another embodiment;
[023] Fig. 14 is an enlarged view of part B of Fig. 13;
[024] Fig. 15 is a cross-sectional view illustrating a flow of refrigerant in the linear compressor according to one embodiment;
[025] Fig. 16 is a view illustrating a flow of a refrigerant discharged from a compression chamber in the first and second passages according to one embodiment; and
[026] Fig. 17 is a view illustrating a flow of coolant in a third passage according to one embodiment. DETAILED DESCRIPTION
[027] Hereinafter, embodiments will be described with reference to the accompanying drawings. The embodiments may, however, be incorporated in many different forms and should not be interpreted as being limited to the embodiments presented herein; rather, alternative embodiments that fall within the spirit and scope will fully convey the concept to those skilled in the art.
[028] Fig. 1 is a schematic diagram of a refrigerator according to one embodiment. Referring to FIG. 1, a refrigerator 10 according to one embodiment may include a plurality of devices for driving a refrigeration cycle.
[029] In detail, the refrigerator 10 may include a compressor 100 that compresses a refrigerant, a condenser 20 that condenses the compressed refrigerant in the compressor 100, a dryer 200 that removes moisture, foreign substances, or oil from the condensed refrigerant in the condenser 20, an expansion device 30 that decompresses the refrigerant that has passed through the dryer 200, and an evaporator 40 that evaporates the decompressed refrigerant in the expansion device 30. The refrigerator 10 may additionally include a condensing fan 25 for blowing air towards the condenser 20, and an evaporating fan 45 for blowing air towards the evaporator 40.
[030] The compressor 100 may be a linear compressor, in which a piston may be connected directly to a motor to compress the refrigerant while the piston is moved alternately in a linear fashion within a cylinder. The expansion device 30 may include a capillary tube of relatively small diameter.
[031] A liquid refrigerant condensed in the condenser 20 may be introduced into the dryer 200. A gaseous refrigerant may be partially contained in the liquid refrigerant. At least one filter for filtering liquid refrigerant introduced into the dryer 200 may be provided in the dryer 200. Hereinafter, the components of the dryer 200 will be described with reference to the accompanying drawings.
[032] Fig. 2 is a cross-sectional view of a cooler dryer according to one embodiment. Referring to Fig. 2, the dryer 200 according to one embodiment may include a dryer body 210 that defines a refrigerant flow space, a refrigerant inlet 211 disposed on or on one or a first side of the dryer body 210 to guide the introduction of the refrigerant. refrigerant, and a refrigerant outlet 215 disposed on either the other or a second side of the dryer body 210 to guide the refrigerant outlet. For example, the dryer body 210 may have a long cylindrical shape.
[033] Dryer filters 220, 230 and 240 may be provided in the dryer body 210. In detail, dryer filters 220, 230 and 240 may include a first dryer filter 220 disposed adjacent the refrigerant inlet 211, a third dryer filter 240 separate from first dryer filter 220 and disposed adjacent the refrigerant discharge 215, and a second dryer filter 230 disposed between first dryer filter 220 and third dryer filter 240.
[034] The first dryer filter 220 may be disposed adjacent an interior of the refrigerant inlet 211, i.e. disposed in a position closer to the refrigerant inlet 211 than the refrigerant outlet 215. The first dryer filter 220 may have an approximately hemispherical shape. An outer circumferential surface of the dryer's first filter 220 may be coupled to an inner circumferential surface of the dryer body 210. A plurality of through holes 221 for guiding the flow of refrigerant may be defined in the dryer's first filter 220. A foreign substance with a relatively large volume can be filtered by the first filter drier 220.
[035] The second filter of the dryer 230 may include a plurality of adsorbents 231. Each of the adsorbents 231 may be a grain of a predetermined size. The adsorbent 231 may be a molecular sieve and have a predetermined size of from about 5 mm to about 10 mm.
[036] A plurality of holes may be defined in the adsorbent 231. Each of the plurality of holes may be similar in size to the size of the oil (about 10 Å). The hole can be larger than a size (about 2.8 Á to about 3.2 Á) of moisture and a size (about 4.0 Á in the case of R134a, and about 4.3 Á in the case of R600a) of the refrigerant. The term “oil” can refer to a working oil or cutting oil injected when refrigeration cycle components are manufactured or processed.
[037] The refrigerant and moisture that passed through the first dryer filter 220 can be easily discharged, even though the refrigerant and moisture are easily introduced into the plurality of holes while passing through the adsorbents 231. Thus, the refrigerant and moisture may not be easily adsorbed on the adsorbents 231. However, if oil is introduced into the plurality of holes, the oil may not be easily discharged, and thus, it can be maintained in a state where the oil is adsorbed on the adsorbents 231.
[038] For example, adsorbent 231 may include a BASF 13X molecular sieve. A defined hole in the BASF 13X molecular sieve can be about 10 Á (1 nm) in size, and the BASF 13X molecular sieve can be expressed as a chemical formula: Na2O • AI2O3 • mSiO2 • nH20 (m < 2.35).
[039] The oil contained in the refrigerant may be adsorbed onto or into the plurality of adsorbents 231 as it passes through the second dryer filter 230. Alternatively, the second dryer filter 230 may include an oil adsorbent paper or an adsorbent containing a felt. , rather than the plurality of adsorbents, each of which is shaped like a grain.
[040] The third dryer filter 240 may include a coupling part 241 coupled to the inner circumferential surface of the dryer body 210, and a mesh 242 extending from the coupling part 241 to the refrigerant discharge 215. The third dryer filter 240 can be called mesh filter. A fine-sized foreign substance contained in the refrigerant can be filtered through the 242 mesh.
[041] Each of the dryer's first filter 220 and dryer's third filter 240 can serve as a support for locating the plurality of adsorbents 231 within the dryer body 210. That is, the discharge of the plurality of adsorbents 231 to from dryer 200 may be restricted by first and third dryer filters 220 and 240.
[042] As described above, filters can be provided on the dryer 200 to remove foreign substances or oil contained in the refrigerant, thus increasing the reliability of the refrigerant acting as a gas support.
[043] Fig. 3 is a cross-sectional view of a linear compressor according to one embodiment. Referring to Fig. 3, the linear compressor 100 according to one embodiment may include a housing 101 of approximately cylindrical shape, a first cover 102 coupled to one or a first side of the housing 101, and a second cover 103 coupled to the other or a second side of housing 101. For example, linear compressor 100 may be arranged in a horizontal direction. The first cover 102 may be coupled to a right side or first side of the housing 101, and the second cover 103 may be coupled to a left or second side of the housing 101. Each of the first and second covers 102 and 103 may be understood as a component of housing 101.
[044] Linear compressor 100 may include a cylinder 120 provided in housing 101, a piston 130 reciprocating linearly within cylinder 120, and a motor assembly 140 which serves as a linear motor to apply a drive force to the piston 130. When the motor assembly 140 operates, the piston 130 can be alternately moved linearly at high speed. Linear compressor 100 according to this embodiment may have a drive frequency of approximately 100 Hz.
[045] Linear compressor 100 may additionally include a suction inlet 104, through which refrigerant can be introduced, and a discharge outlet 105, through which refrigerant compressed in cylinder 120 can be discharged. The suction inlet 104 can be coupled to the first cover 102, and the discharge outlet 105 can be coupled to the second cover 103.
[046] Refrigerant drawn in through suction inlet 104 can flow to piston 130 via suction silencer 150. As the refrigerant passes through suction silencer 150, noise can be reduced. Suction silencer 150 may be configured by coupling a first silencer 151 to a second silencer 153. At least a portion of suction silencer 150 may be disposed within piston 130.
[047] The piston 130 may include a piston body 131 with an approximately cylindrical shape, and a piston flange 132 extending from the piston body 131 in a radial direction. Piston body 131 can be alternately moved within cylinder 120, and piston flange 132 can be moved alternately out of cylinder 120.
[048] The piston 130 may be formed of a non-magnetic material, such as an aluminum material, such as aluminum or an aluminum alloy. As the piston 130 is formed of aluminum material, a magnetic flux generated in the motor assembly 140 may not be transmitted to the piston 130, and thus, may be prevented from leaking out of the piston 130. Furthermore, as the piston 130 has a low weight, piston 130 can be moved alternately with ease. Piston 130 can be manufactured by a forging process, for example.
[049] The cylinder 120 may be formed of a non-magnetic material, such as an aluminum material, such as aluminum or an aluminum alloy. Furthermore, cylinder 120 and piston 130 may have the same material composition, i.e., the same type and composition.
[050] As cylinder 120 may be formed of aluminum material, a magnetic flux generated in motor assembly 200 may not be transmitted to cylinder 120, and thus, may be prevented from leaking out of cylinder 120. Cylinder 120 it can be manufactured by an extrusion rod processing process, for example.
[051] Furthermore, since the piston 130 may be formed of the same material (aluminium) as the cylinder 120, the piston 130 may have the same coefficient of thermal expansion as the cylinder 120. When the linear compressor 100 operates, a high temperature environment (a temperature of approximately 100°C) can be created within housing 100. Thus, since piston 130 and cylinder 120 have the same coefficient of thermal expansion, piston 130 and cylinder 120 can be thermally deformed. by the same degree. As a result, piston 130 and cylinder 120 can be thermally deformed in different sizes and directions from each other to prevent piston 130 from interfering with cylinder 120 as piston 430 moves.
[052] Cylinder 120 can accommodate at least a part of the suction silencer 150 and at least a part of the piston 130. The cylinder 120 can have a compression space P in which the refrigerant can be compressed by the piston 130. A bore suction port 133, through which refrigerant may be introduced into the compression space P, may be set on or at a front of the piston 130, and a suction valve 135 for selectively opening the suction hole 133 may be arranged over or on a front side of the suction hole 133. A coupling hole, to which a predetermined coupling member can be coupled, can be defined in an approximately central part of the suction valve 135.
[053] A discharge cover 160 which defines a discharge space or discharge passage for refrigerant discharged from the compression space P, and a discharge valve assembly 160, 162 and 163 coupled to the discharge cover 160 to selectively discharging the compressed refrigerant into the compression space P may be provided on a front side of the compression space P. The discharge valve assembly 161, 162 and 163 may include a discharge valve 161 for introducing the refrigerant into the discharge space of the cover. discharge valve 160 when a pressure within the compression space P is above a predetermined discharge pressure, a valve spring 162 disposed between the discharge valve 161 and the discharge cover 160 to apply a spring force in an axial direction, and a stop 163 that restricts deformation of the valve spring 162.
[054] The term “compression space P” may refer to a defined space between the suction valve 135 and the discharge valve 161. The term “axial direction” may refer to a direction in which the piston 130 is moved. alternately, that is, a transverse direction in Fig. 3. In the axial direction, a direction from the suction inlet 104 towards the discharge outlet 105, that is, a direction in which the refrigerant flows, can be defined as a "front direction", and a direction opposite to the direction front can be defined as “rear direction”. On the other hand, the term "radial direction" may refer to a direction perpendicular to the direction in which the piston 130 is alternately moved, i.e., a horizontal direction in Fig. 7.
[055] The stopper 163 may be seated in the discharge cover 160, and the valve spring 162 may be seated on a rear side of the stopper 163. The discharge valve 161 may be coupled to the valve spring 162, and a rear or rear surface of flush valve 161 may be supported by a front surface of cylinder 120. Valve spring 162 may include a flat spring, for example.
[056] The suction valve 135 can be arranged on or on one or a first side of the compression space P, and the discharge valve 161 can be arranged on or on the other or on a second side of the compression space P, i.e. that is, an opposite side of the suction valve 135.
[057] While the piston 130 is alternately moved in a linear fashion within the cylinder 120, when the compression space pressure P is below the predetermined discharge pressure and a predetermined suction pressure, the suction valve 135 can be opened to vacuum the refrigerant into the compression space P. On the other hand, when the pressure of the compression space P is above the predetermined suction pressure, the refrigerant can be compressed into the compression space P in a state where the suction valve 135 is closed.
[058] When the pressure of the compression space P is above the predetermined discharge pressure, the valve spring 162 can be deformed to open the discharge valve 161. The refrigerant can be discharged from the compression space P to the discharge space of the discharge cover 160.
[059] The refrigerant flowing into the discharge space of the discharge cover 160 may be introduced into a circular tube 165. The circular tube 165 may be coupled to the discharge cover 160 to extend to the discharge outlet 105, thereby guiding the refrigerant is compressed in the discharge space to the discharge outlet 105. For example, the circular tube 165 may have a shape that is wound in a predetermined direction and extends in a rounded shape. Circular tube 165 can be coupled to discharge outlet 105.
[060] Linear compressor 100 may additionally include a frame 110. Frame 110 may secure cylinder 120 and be coupled to cylinder 120 by a separate coupling member, for example. Frame 110 may surround cylinder 120. That is, cylinder 120 may be accommodated within frame 110. In addition, discharge cover 172 may be coupled to a front surface of frame 110.
[061] At least a portion of the high-pressure refrigerant gas discharged through the open dump valve 161 may flow towards a circumferential outer surface of the cylinder 120 through a space in a part in which the cylinder 120 and the frame 110 are coupled to each other. Refrigerant may be introduced into cylinder 120 through one or more gas inlets (see reference numeral 122 in Fig. 7) and one or more nozzles (see reference numeral 123 in Fig. 7), which can be defined in cylinder 120. The introduced coolant may flow into a space defined between the piston 130 and the cylinder 120 to allow an outer circumferential surface of the piston 130 to be separated from the inner circumferential surface of the cylinder 120. Thus, the introduced coolant can serve of "gas support" that reduces friction between piston 130 and cylinder 120 as piston 200 is alternately moved.
[062] Engine assembly 140 may include outer stators 141, 143 and 145 attached to frame 110 and arranged to surround cylinder 120, an inner stator 148 arranged to be spaced internally with respect to outer stators 141, 143 and 145 , and a permanent magnet 146 disposed in a space between the outer stators 141, 143 and 145 and the inner stator 148. The permanent magnet 146 can be alternately moved in a linear fashion by a mutual electromagnetic force between the outer stators 141, 143 and 145 and internal stator 148. Permanent magnet 146 may be a single magnet having one polarity, or a plurality of magnets having three polarities.
[063] The permanent magnet 146 can be coupled to the piston 130 by a connecting member 138, for example. In detail, the connecting member 138 can be coupled to the flange of the piston 132 and be curved to extend towards the permanent magnet 146. As the permanent magnet 146 is alternately moved, the piston 130 can be alternately moved along with the permanent magnet 146 in the axial direction.
[064] The motor assembly 140 may additionally include an attachment member 147 for attaching the permanent magnet 146 to the connection member 138. The attachment member 147 may be formed of a composition in which a fiberglass or carbon fiber is mixed with a resin. Attachment member 147 may be provided to encircle the exterior of permanent magnet 146 to securely maintain a coupled state between permanent magnet 146 and connecting member 138.
[065] The external stators 141, 143 and 145 may include coil winding bodies 143 and 145, and a stator core 141. The coil winding bodies 143 and 145 may include a coil 143, and a coil 145 wound on a circumferential direction of the coil 143. The coil 145 may have a polygonal cross section, for example a hexagonal cross section. The stator core 141 can be manufactured by stacking a plurality of laminations in a circumferential direction, arranging them to surround the coil winding bodies 143 and 145.
[066] A stator cover 149 may be arranged on or on one side of the outer stators 141, 143 and 145. One or a first side of the outer stators 141, 143 and 145 may be supported by the frame 110, and the other or a second side of the outer stators 141, 143 and 145 may be supported by the stator cover 149.
[067] Inner stator 148 may be attached to a circumference of frame 110. Furthermore, in inner stator 148, a plurality of laminations may be stacked in a circumferential direction outside frame 110.
[068] Linear compressor 100 may additionally include a bracket 137 which supports piston 130, and a rear cover 170 spring-coupled to bracket 137. Support 137 may be coupled to piston flange 132 and connecting member 138 by a predetermined coupling member, for example.
[069] A suction guide 155 may be coupled to a front portion of the rear cover 170. The suction guide 155 may guide the suctioned refrigerant through the suction inlet 104 to introduce the refrigerant into the suction silencer 150.
[070] Linear compressor 100 may also include a plurality of springs 176, which are adjustable in natural frequency, to allow piston 130 to perform resonant motion. The plurality of springs 176 may include a first spring supported between bracket 137 and stator cover 149, and a second spring supported between bracket 137 and rear cover 170.
[071] Linear compressor 100 may additionally include flat springs 172 and 174, respectively, disposed on both sides of housing 101 to allow internal components of compressor 100 to be supported by housing 101. Plate springs 172 and 174 may include a first flat spring 172 coupled to the first cover 102, and a second flat spring 174 coupled to the second cover 103. For example, the first flat spring 172 can be fitted to a portion in which the housing 101 and the first cover 102 are coupled. each other, and the second flat spring 174 can be fitted to a part in which the housing 101 and the second cover 103 are coupled to each other.
[072] Fig. 4 is a cross-sectional view of a suction silencer according to one embodiment. Fig. 5 is a view illustrating a state of a first filter coupled to the suction silencer according to one embodiment.
[073] Referring to Figs. 4 and 5, the suction silencer 150 in accordance with the present embodiment may include the first silencer 151, the second silencer 153 coupled to the first silencer 151, and a first filter 310 supported by the first and second silencers 151 and 153. flow, in which the refrigerant can flow, can be defined in each of the first and second silencers 151 and 153. The first silencer 151 can extend from the interior of the suction inlet 104 in a direction of the discharge outlet 105, and at least a portion of the first silencer 151 may extend into the suction guide 155. The second silencer 153 may extend from the first silencer 151 into the piston body 131.
[074] The first filter 310 can be arranged in the flow space to filter out foreign substances. The first filter 310 may be formed of a material having a magnetic property. Thus, foreign substances contained in the refrigerant, in particular metallic substances, can be easily filtered out. The first filter 310 may be formed of stainless steel, for example, and thus have a magnetic property to prevent the first filter 310 from rusting. As another example, the first filter 310 may be coated with a magnetic material, or a magnet may be attached to a surface of the first filter 310.
[075] The first filter 310 may be a mesh-like structure and have an approximately circular plate shape. Each filter hole of the first filter 310 may have a diameter or width smaller than a predetermined diameter or width. For example, the predetermined size may be about 25 µm.
[076] The first muffler 151 and the second muffler 153 can be fitted together using a snap fit way, for example. The first filter 310 can be fitted to a part in which the first and second silencers 151 and 153 are coupled or press fit together, and then can be mounted.
[077] In detail, a groove 151a, to which at least a portion of the second silencer 153 may be coupled, may be defined in the first silencer 151. The second silencer 153 may include a protrusion 153a inserted into the groove 151a of the first silencer 151. The first filter 310 may be supported by the first and second silencers 151 and 153 in a state where both sides of the first filter 310 may be disposed between the groove 151a and the bulge 153a. In a state where the first filter 310 is disposed between the first and second silencers 151 and 153 when the first and second silencers 151 and 153 move in a direction approaching each other and are then snap-fitted, both sides of first filter 310 can be inserted and secured between slot 151a and protrusion 153a.
[078] As described above, as the first filter 310 is provided in the suction silencer 150, a foreign substance having a size larger than a predetermined size of the refrigerant drawn in through the suction inlet 104 can be filtered by the first filter 310. Thus , the first filter 310 can filter the foreign substance from the refrigerant by acting as the gas support between the piston 130 and the cylinder 120 to prevent the foreign substance from being introduced into the cylinder 120. Furthermore, once the first filter 310 is fixed firmly in the part where the first and second silencers 151 and 153 are coupled or press fit, separation of the first filter 310 from the suction silencer 150 can be prevented.
[079] In this embodiment, although the groove 151a is defined in the first silencer 151 and the bulge 153a is arranged in the second silencer 153, the embodiments are not limited thereto. For example, the bulge 153a can be arranged on the first muffler 151, and the groove 151a can be defined on the second muffler 153.
[080] Fig. 6 is a view illustrating components around a compression chamber according to one embodiment. Fig. 7 is a perspective exploded view of a coupled state between a cylinder and a frame according to one embodiment, Fig. 8 is a perspective exploded view illustrating cylinder and frame configurations according to one embodiment. Fig. 9 is an exploded perspective view of the frame according to one embodiment. Fig. 10 is a cross-sectional view illustrating a state in which the cylinder and piston are coupled together in accordance with one embodiment.
[081] Referring to Figs. 6 to 10, in the linear compressor 100 according to this embodiment, at least a part of the refrigerant compressed and discharged from the compression chamber P may flow into a space between the frame 110 and the cylinder 120. The space between the frame 110 and the cylinder 120 may be a gap defined between an inner surface of frame 110 and an outer surface of cylinder 120 which is formed by an assembly tolerance of frame 110 and cylinder 120.
[082] Passages 410, 420 and 430 may be provided in the space between frame 110 and cylinder 120. Passage 410, 420 and 430 may include a first passage 410, a second passage 420 and a third passage 430, which may be successively provided in one direction of flow of the refrigerant.
[083] In detail, the cylinder 120 may include a cylinder body 121 with an approximately cylindrical shape, and a cylinder flange 125 that extends from the cylinder body 121 in a radial direction. Cylinder body 121 may include a gas inlet 122 through which discharged refrigerant gas may be introduced. Gas inlet 122 may be formed in a circular shape along a circumferential surface of cylinder body 121.
[084] A plurality of gas inlets 122 may be provided. The plurality of gas inlets 122 may include gas inlets (see reference numerals 122a and 122b of Fig. 11) disposed on or on one or a first side with respect to a center or central part 121c of the cylinder body 121 in an axial direction, and a gas inlet (see reference numeral 122c of Fig. 11) disposed on either the other or a second side with respect to the center or central part 121c of the cylinder body 121 in the axial direction.
[085] One or more coupling parts 126 coupled to frame 110 may be arranged on cylinder flange 125. Each coupling part 126 may project outward from an outer circumferential surface of cylinder flange 125, and be coupled to a cylinder coupling hole 128 of the frame 110 by a predetermined coupling member, for example a screw.
[086] The cylinder flange 125 may have a seating surface 127 seated in the frame 110. The seating surface 127 may be a rear surface of the cylinder flange 125 which extends from the cylinder body 121 in the radial direction. .
[087] The frame 110 may include a frame body 111 which surrounds the cylinder body 121, and a cover coupling part 115 which extends in a radial direction from the frame body 111 and coupled to the discharge cover 160. A cover coupling part 115 may include a plurality of cover coupling holes 116 into which the coupling member coupled to the discharge cover 160 may be inserted, and a plurality of cylinder coupling holes 118 into which the coupling member coupling mated to the flange of cylinder 125 can be inserted. Cylinder coupling holes 118 can be defined in recessed positions somewhat from the cover coupling part 115.
[088] A recess 117 which communicates with the frame body 111 may be provided in the frame 110. The recess 117 may be recessed rearwardly from the cover coupling part 115. The cylinder flange 125 may be inserted into the recess 117. That is, the recess 117 may be arranged to encircle an outer circumferential surface of the cylinder flange 125. The recess 117 may have a recessed depth corresponding to a front/rear width of the cylinder flange 125.
[089] A predetermined coolant flow space, i.e., the first passage 410 may be defined between an inner circumferential surface of the recess 117 and the outer circumferential surface of the cylinder flange 125. In a state where the cylinder 120 is mounted with the frame 110, a predetermined mounting tolerance may be provided between the outer circumferential surface of the cylinder flange 125 and the inner circumferential surface of the recess 117. A space corresponding to the mounting tolerance may be defined as the first pass 410.
[090] The high pressure refrigerant gas discharged through the discharge valve 161 may flow to the second passage 420 provided with a second filter 320 through the first passage 410. The second filter 320 may be a filter member disposed between the frame 110 and cylinder 120 for filtering high pressure refrigerant gas discharged through discharge valve 161.
[091] In detail, a seat 113 having a stepped portion may be arranged at a rear end of the recess 117. The seat 113 may extend inwardly from the recess 117 in a radial direction and may be arranged to face the recess 117. surface of the seat 127 of the cylinder flange 125. The second filter 320 having the form of a ring can be seated in the seat 113.
[092] In a state where second filter 320 is seated in seat 113, when cylinder 120 is coupled to frame 110, cylinder flange 125 can push second filter 320 from a front side of second filter 320. That is, the second filter 320 can be arranged and secured between the seat 113 of the frame 110 and the seat 127 surface of the cylinder flange 125.
[093] The second passage 420 may be a passage through which the refrigerant which has passed through the first passage 410 may flow. A predetermined mounting tolerance may be provided between the seat 113 and the seat 127 surface of the cylinder flange 125. A space corresponding to the mounting tolerance may be defined as the second passage 420.
[094] The second filter 320 may be arranged in the second passage 420 to prevent foreign substances in the high pressure refrigerant gas flowing into the second passage 420 from being introduced into the gas inlet 122 of the cylinder 120 and adsorbing the oil contained in the refrigerant.
[095] For example, the second filter 320 may include a felt formed of polyethylene terephthalate (PET) fiber or an adsorbent paper. PET fiber can have superior mechanical strength and thermal resistance. In addition, a foreign substance with a size of about 2 μm or more, which is contained in the refrigerant, can be blocked.
[096] While the second pass 420 is provided with the second filter 320 in this embodiment, the embodiments are not limited thereto. For example, the second filter 320 may be provided in the first passage 410, i.e., a space between the circumferential outer surface of the cylinder flange 125 and the inner circumferential surface of the recess 117 of the frame 110.
[097] Passages 410, 420 and 430 may include a third passage 430 through which refrigerant which has passed through the second passage 420 may flow. Third passage 430 may extend rearwardly from second passage 420 along the circumferential outer surface of cylinder body 121. Third passage 430 may extend upward to a space between a rear portion of frame body 111 and a first end of the body (see reference numeral 121a in Fig. 11) of the cylinder body 121. Refrigerant flowing into the third passage 430 may flow towards the inner circumferential surface of the cylinder 120 via the gas inlet 122 and the mouthpiece 123.
[098] Fig. 11 is a view of the cylinder according to one embodiment. Fig. 12 is an enlarged cross-sectional view of part A of Fig. 10.
[099] Referring to Figs. 11 and 12, cylinder 120 according to one embodiment may include cylinder body 121 having an approximately cylindrical shape to form a first end of body 121a and a second end of body 121b, and cylinder flange 125 which extends from the second end of the body 121b of the cylinder body 121 in the axial direction.
[0100] Cylinder body 121 may include a plurality of gas inlets 122 through which at least a portion of the high pressure refrigerant gas discharged through discharge valve 161 may flow. The third filter 330 may be provided at the plurality of gas inlets 122. The cylinder body 121 additionally includes one or more nozzles 123 that extend inwardly from the plurality of gas inlets 122 in the radial direction.
[0101] The plurality of gas inlets 122 and nozzles 123 can be understood as a component of the third passage 430. Thus, at least a portion of the refrigerant flowing into the third passage 430 may flow to the circumferential inner surface of the cylinder 120. through the plurality of gas inlets 122 and nozzles 123. Each of the plurality of gas inlets 122 may be recessed from the outer circumferential surface of the cylinder body 121 by a predetermined depth and width.
[0102] The introduced refrigerant may be disposed between the outer circumferential surface of the piston 130 and the inner circumferential surface of the cylinder 120 to support the gas with respect to the movement of the piston 130. That is, the outer circumferential surface of the piston 130 may be maintained in a state where the outer circumferential surface of the piston 130 is pushed away from the inner circumferential surface of the cylinder 120 by the pressure of the refrigerant.
[0103] The plurality of gas inlets 122 may include the first and second gas inlets 122a disposed on or on one or the first side with respect to the central part 121c in the axial direction of the cylinder body 121, and the third gas inlet 122c disposed on either the other or the second side with respect to the central part 121c in the axial direction. The first and second gas inlets 122a and 122b may be disposed at positions closer to the second end of the body 121b with respect to the central part 121c in the axial direction of the cylinder body 121, and the third gas inlet 122c may be arranged in a closest position of the first end of the body 121a with respect to the central part 121c in the axial direction of the cylinder body 121. That is, the plurality of gas inlets 122 may be provided in numbers which are not symmetrical to each other with respect to the center 121c in the axial direction of the cylinder body 121.
[0104] Referring to Fig. 11, cylinder 120 may have relatively high internal pressure at one side of the second end of body 121b, which may be closer to a discharge side of the compressed refrigerant as compared to the first end of body 121a, which may be closer to one refrigerant suction side. Thus, more gas inlets 122 can be provided on the second end side of the body 121b to improve the function of the gas holder. However, relatively few gas inlets 122 can be provided on the first end side of the body 121a.
[0105] Cylinder body 121 may additionally include nozzle 123 which extends from the plurality of gas inlets 122 towards the inner circumferential surface of cylinder body 121. Each nozzle 123 may have a width or size less than a width or size of the gas inlet 122.
[0106] A plurality of nozzles 123 may be provided along each gas inlet 122 which extends in a circular fashion. The plurality of nozzles 123 may be arranged to be spaced apart.
[0107] Each nozzle 123 includes an inlet 123a connected to the respective gas inlet 122, and an outlet 123b connected to the inner circumferential surface of the cylinder body 121. The nozzle 123 may have a predetermined length from the inlet 123a to the output 123b.
[0108] A recessed width and depth of each of the plurality of gas inlets 122, and the length of the nozzle 123, can be determined to be adequately sized in consideration of the rigidity of the cylinder 120, the amount of the third filter 330, or the intensity in the pressure drop of refrigerant passing through nozzle 123. For example, if the width and recessed depth of each of the plurality of gas inlets 122 are too large, or the length of nozzle 123 is too short, the rigidity of cylinder 120 can be weak. On the other hand, if the recessed width and depth of each of the plurality of gas inlets 122 are very small, the amount of third filter 330 provided in the gas inlet portion 122 may be very small. Furthermore, if the length of the nozzle part 123 is too long, a pressure drop of the refrigerant passing through the nozzle 123 may be too great, and it may be difficult to perform the gas support function.
[0109] The inlet 123a of the nozzle 123 may have a larger diameter than a diameter of the outlet 123b. In detail, if the diameter of the nozzle 123 is too small, an amount of the refrigerant, which is introduced through the nozzle 123, of the high pressure refrigerant gas discharged through the discharge valve 161 can be too large, increasing the flow loss in the compressor. . On the other hand, if the diameter of the nozzle 123 is too small, the pressure drop across the nozzle 123 may increase, reducing performance as a gas support.
[0110] Thus, in this embodiment, the inlet 123a of the nozzle 123 may have a relatively large diameter to reduce the pressure drop of the refrigerant introduced into the nozzle 123. Furthermore, the outlet 123b may have a relatively small diameter to control an amount of gas carrier inlet through nozzle 123 to a predetermined value or less.
[0111] The third filter 330 can be arranged in the plurality of gas inlets 122. The refrigerant flowing towards the inner circumferential surface of the cylinder 120 can be filtered by the third filter 330.
[0112] In detail, the third filter 330 can prevent a foreign substance having a predetermined size or larger from being introduced into the cylinder 120 and performs a function to absorb the oil contained in the refrigerant. The predetermined size can be around 1 μm.
[0113] The third filter 330 may include a line wound around the gas inlet 122. The line may be formed of a polyethylene terephthalate (PET) material and have a predetermined thickness or diameter.
[0114] The thickness or diameter of the line can be determined to have adequate dimensions in consideration of the rigidity of the line. If the thickness or diameter of the thread is too small, the thread may break easily due to the very low strength of the thread. On the other hand, if the thickness or diameter of the line is too large, the filtering effect with respect to foreign substances may be impaired due to the very large pore in the gas inlet 122 when the line is wound.
[0115] For example, the thickness or diameter of the line can be several hundred μm. The thread can be manufactured by coupling a plurality of filaments of a spun thread of several tens of μm to each other, for example.
[0116] The thread can be wound several times, and one end of the thread can be fixed through or by a knot. A series of line windings can be properly selected in consideration of the pressure drop of the refrigerant gas and the filtering effect with respect to foreign substances. If the number of line windings is too large, the pressure drop of the refrigerant gas may increase. On the other hand, if the number of line windings is too small, the filtering effect with regard to foreign substances may be reduced.
[0117] In addition, a tension force of the wound line can be properly controlled in consideration of cylinder deformation and line clamping. If the tension force is too large, deformation of the cylinder 120 may occur. On the other hand, if the tension force is too small, the thread may not be securely attached to the gas inlet 122.
[0118] Fig. 13 is a cross-sectional view illustrating a state in which the cylinder and piston are coupled together in accordance with one embodiment. Fig. 14 is an enlarged view of part B of Fig. 13.
[0119] Referring to Figs. 13 and 14, the linear compressor 100 according to one embodiment may include a seal pocket 370 which communicates with the third passage 430 and in which the seal member 350 may be disposed.
[0120] Sealing pocket 370 may be a space in which sealing member 350 may be installed. Sealing pocket 370 may be defined between the inner circumferential surface of the frame body 111 and the outer circumferential surface of the cylinder body 121. The sealing pocket 370 may be defined on or on a back side of the frame 110 and cylinder 120 The seal pocket 370 may have a flow cross-sectional area greater than a flow cross-section of the third passage 430 with respect to the flow direction of the coolant.
[0121] In detail, a pocket forming part 112 recessed outwardly from the inner circumferential surface of the frame body 111 in the radial direction may be provided on or at a rear part of the frame body 111. pocket 112 may form at least one surface of seal pocket 370. The frame body 111 may additionally include a second slanted portion 119 that extends inwardly and rearwardly slant from pocket-forming portion 112.
[0122] Cylinder body 121 may include a first sloped portion 128 that forms sealing pocket 370. First sloped portion 128 may form at least one surface of sealing pocket 370.
[0123] The first inclined part 128 can extend in backward and inward inclination from the first end of the body 121a of the cylinder body 121. The first inclined part 128 can extend from the inside of the pocket forming part 112 upwards to a position corresponding to the interior of the second angled part 119.
[0124] The height of the sealing pocket 370 in the radial direction can be greater than the diameter of the sealing member 350 due to the recessed structure of the pocket formation 112 and the inclined structure of the first inclined part 128. The length of the sealing pocket 370 in an axial direction can be larger than the diameter of the sealing member 350. That is, the sealing pocket 370 can be of a sufficient size that the sealing member can be movable without interfering with the frame body 111 or the body. of cylinder 121.
[0125] A gap or separation distance between a rear part of the first inclined part 128 and a rear part of the second inclined part 119 can be smaller than the diameter of the sealing member 350. Thus, when the coolant flows backwards along of the third passage 430 while the linear compressor 100 operates, the sealing member 350 can be moved back by the pressure of the refrigerant to seal the space.
[0126] As described above, since the sealing member 350 can be disposed between the cylinder 120 and the frame 110 to seal the third passage 430, it is possible, therefore, to prevent the refrigerant in the third passage 430 from leaking out of the frame 110. Further, when sealing member 350 is movably disposed in sealing pocket 370, and the compressor operates to generate a flow of refrigerant in third passage 430, sealing member 350 may depress cylinder 120 and frame 110 to prevent cylinder 120 from being deformed by a pressing force on sealing member 350.
[0127] Hereafter, a flow of the refrigerant while the linear compressor operates will be described.
[0128] Fig. 15 is a cross-sectional view illustrating a flow of refrigerant in the linear compressor according to one embodiment. Fig. 16 is a view illustrating a flow of a refrigerant discharged from a compression chamber in the first and second passages according to one embodiment. Fig. 17 is a view illustrating a flow of coolant in a third passage according to one embodiment.
[0129] A flow of refrigerant in the linear compressor according to one embodiment will be described hereinafter with reference to Fig. 15.
[0130] Referring to Fig. 15, refrigerant may be introduced into housing 101 through suction inlet 104 and flow to suction silencer 150 through suction guide 155. Refrigerant may be introduced into second silencer 153 via first silencer 151 of suction silencer 150 to flow to piston 130. In this way, refrigerant suction noise can be reduced.
[0131] A foreign substance of a predetermined size (about 25 µm) or more, which is contained in the refrigerant, may be filtered while passing through the first filter 310 provided in the suction silencer 150. The refrigerant inside the piston 130 after the passage through suction silencer 150 may be sucked into compression space P through suction hole 133 when suction valve 135 is opened.
[0132] When the pressure of the refrigerant in the compression space P is above the predetermined discharge pressure, the discharge valve 161 can be opened. Thus, the refrigerant can be discharged into the discharge space of the discharge cover 160 through the open discharge valve 161. In detail, the discharge valve 161 can move forward and then be detached from a front surface of the cylinder. 120. In this way, the valve spring 162 can be elastically deformed in the forward direction. In addition, the limiter 163 can restrict the deformation of the valve spring 162 to a predetermined degree.
[0133] The refrigerant discharged into the discharge space of the discharge hood 160 may flow to the discharge outlet 105 through the circular tube 165 coupled to the discharge hood 160, and then, may be discharged out of the compressor 100. At least a portion of the refrigerant within the discharge space of the discharge cover 160 may flow into a space defined between the cylinder 120 and the frame 110, i.e. the first passage 410 and the second passage 420. The refrigerant may be filtered by the second filter. 320 while flowing to the first or second pass 410 or 420.
[0134] The filtered refrigerant may flow towards the outer circumferential surface of the cylinder body 121 through the third passage 430. At least a part of the refrigerant may be introduced into the plurality of gas inlets 122 provided in the cylinder body 121. Refrigerant introduced into the plurality of gas inlets 122 may be filtered by third filter 330, and then, may be introduced into cylinder 120 through nozzle(s) 123. Refrigerant introduced into cylinder 120 may be arranged between the inner circumferential surface of cylinder 120 and the outer circumferential surface of piston 130 to space piston 130 from the inner circumferential surface of cylinder 120 (gas holder).
[0135] As described above, high pressure refrigerant gas can be diverted within cylinder 120 to support the reciprocating piston 130, thereby reducing abrasion between piston 130 and cylinder 120. Furthermore, since oil is not used for the support, friction loss due to oil may not occur even though the compressor 100 operates at a high speed.
[0136] Furthermore, since the plurality of filters can be provided in the passage of the refrigerant flowing to the compressor 100, the foreign substances contained in the refrigerant can be removed. Thus, the refrigerant acting as the gas support can be increased in reliability. Thus, it is possible to prevent the piston 130 or cylinder 120 from being worn out by foreign substances contained in the coolant.
[0137] Furthermore, since the oil contained in the refrigerant can be removed by the plurality of filters, it can prevent friction loss from occurring due to the oil. The first, second and third filters 310, 320 and 330 may be called a "refrigerant filter device" as filters 310, 320 and 330 filter the refrigerant that serves as a gas support.
[0138] The refrigerant flowing into the third passage 430 can act on the sealing member 350. That is, the pressure of the refrigerant can act on the sealing member 350. Thus, the sealing member 350 can move from the sealing pocket 370 to a position between the first inclined part 128 of the cylinder 120 and the second inclined part 119 of the frame 110.
[0139] In addition, the sealing member 350 can be intimately connected to the cylinder 120 and the frame 110 to seal the space between the cylinder 120 and the frame 110, i.e. the space between the first inclined part 128 and the second inclined part 119. Thus, it can prevent the coolant within the third passage 430 from leaking out through the space between the cylinder 120 and the frame 110.
[0140] When the operation of the linear compressor 100 is stopped, the pressure of the refrigerant acting on the sealing member 350 can be released. Thus, adhesion between cylinder 120 and frame 110 can be poor. As a result, the sealing member 350 can move freely within the sealing pocket 220. For example, the sealing member 350 can be moved away from the first sloped part 128 and the second sloped part 119 (dotted line).
[0141] Due to the effect described above, since the sealing member 350 is intimately connected to the cylinder 120 and the frame 110 to effect the sealing of the third passage 430 only when the compressor 100 operates, the force applied from the sealing member seal 350 to cylinder 120 can be reduced. Thus, deformation of cylinder 120 can be prevented.
[0142] Furthermore, since the sealing member 350 is movable in the sealing pocket 370, interference of the sealing member 350 when the cylinder 120 and the frame 110 are mounted together can be avoided. Therefore, cylinder 120 and frame 110 can be easily assembled together.
[0143] According to the embodiments, the compressor including internal components can be reduced in size to reduce the volume of a refrigerator's engine room and increase the internal refrigerant storage space. In addition, the compressor drive frequency can be increased to prevent the performance of internal components from being degraded due to the compressor's size reduction. Furthermore, since the gas support is applied between the cylinder and the piston, the frictional force that occurs due to the oil can be reduced.
[0144] Furthermore, since at least a part of the refrigerant compressed and discharged from the compression chamber can flow towards the outer circumferential surface of the cylinder through the passage between the cylinder and the frame, and flow towards the inner circumferential surface cylinder through the gas inlet and nozzle, the gas holder can be formed easily. Furthermore, since the coolant flows uniformly towards the outer circumferential surface of the cylinder through the space defined between the cylinder and the frame, deformation of the cylinder due to the coolant can be prevented. Additionally, when the cylinder and frame are assembled, since an assembly tolerance due to an outside diameter of the cylinder and an inside diameter of the frame are adjustable, it is possible to reduce the possibility of product failure due to blockage of the coolant passage. .
[0145] The sealing member for sealing the refrigerant flow space between the cylinder and the frame can be movable, and the sealing member can seal the gap between the cylinder and the frame by the refrigerant pressure while the compressor operates to improve operational reliability. The pocket in which the sealing member can be disposed may be larger than the size of the sealing member to allow the sealing member to move. Furthermore, the force applied to the frame or cylinder can be reduced by the sealing member. Thus, deformation of the cylinder formed of aluminum material can be prevented.
[0146] Additionally, interference by the sealing member when the cylinder and the frame are mounted together can be reduced by the pocket, and thus, the cylinder and the frame can be mounted easily. Furthermore, since the plurality of filtering devices can be provided in the compressor, foreign substances or the oil contained in the compression gas (or discharge gas) can be prevented from being introduced into the nozzle. In particular, the first filter can be provided in the suction silencer to prevent foreign substances contained in the refrigerant from being introduced into the compression chamber. The second filter can be provided at the coupling part between the cylinder and the frame to prevent foreign substances and oil contained in the compressed refrigerant gas from flowing into the gas inlet of the cylinder. The third filter may be provided at the gas inlet of the cylinder to prevent foreign substances and oil from being introduced into the mouth of the cylinder from the gas inlet.
[0147] In addition, the filter device may be provided in the dryer provided in the cooler to filter out moisture, foreign substances, or oil contained in the cooler. As described above, since the foreign substances or oil contained in the compression gas acting as the support is filtered through the plurality of filtering devices provided in the compressor and dryer, this can prevent the cylinder nozzle from being blocked by the foreign substances or oil. Once cylinder nozzle blockage is prevented, gas support effect can be effectively realized between cylinder and piston, and thus, cylinder and piston abrasion can be avoided.
[0148] The embodiments disclosed herein provide a linear compressor, in which a gas carrier can easily operate between a cylinder and a piston.
[0149] The embodiment disclosed herein provides a linear compressor which may include a housing including a suction inlet; a cylinder provided in the housing to define a compression space for a refrigerant; a piston alternately moved in an axial direction within the cylinder; a relief valve provided on one side of the cylinder for selectively discharging compressed refrigerant into the compression space; a nozzle arranged in the cylinder for introducing at least a part of the discharged refrigerant through the discharge valve into the cylinder; and a passage for guiding the discharged refrigerant from the discharge valve to the nozzle. The linear compressor may additionally include a frame coupled to the cylinder to surround the outside of the cylinder.
[0150] The passage can be defined between an outer circumferential surface of the cylinder and an inner circumferential surface of the frame. The cylinder may include a cylinder body including the nozzle part or nozzle, and a cylinder flange portion or flange extending outwardly from the cylinder body in a radial direction.
[0151] The frame may include a frame body that surrounds the cylinder body, and a recess or recess part, into which the flange portion of the cylinder may be inserted. The recess part can communicate with the frame body.
[0152] The passage may include a first passage defined between an outer circumferential surface of the cylinder flange part and an inner circumferential surface of the recess part. The frame may additionally include a seat or seat portion which extends inwardly from the recess portion in the radial direction and on which a seating surface of the cylinder flange portion may be seated.
[0153] The passage may additionally include a second passage defined between the seat part and the seat surface of the cylinder flange part. A second filter can be arranged in the second pass. The second filter may include a felt formed from polyethylene terephthalate (PET) fiber or an adsorption paper.
[0154] The passage may additionally include a third passage extending from the second passage into a space between an outer circumferential surface of the cylinder body and an outer circumferential surface of the frame body.
[0155] The linear compressor may additionally include a gas inlet part or inlet recessed from the outer circumferential surface of the cylinder body to communicate with the nozzle part. At least a part of the refrigerant flowing into the third passage may flow to the inner circumferential surface of the cylinder body through the gas inlet part and the mouth part. A third filter including a thread can be arranged in the gas inlet part.
[0156] The linear compressor may additionally include a sealing pocket that communicates with the third passage, and a sealing member movably disposed in the sealing pocket to seal a space between the inner circumferential surface of the frame and the outer circumferential surface of the cylinder.
[0157] The embodiments disclosed herein provide a linear compressor which may include a housing including a suction inlet; a cylinder provided in the housing to define a compression space for a refrigerant; a frame coupled to the outside of the cylinder; a piston alternately moved in an axial direction within the cylinder; a discharge valve movably coupled to the cylinder for selectively discharging the compressed refrigerant in the compression space into the refrigerant; and a passage through which at least a portion of the refrigerant discharged from the discharge valve can flow. The passage may extend into a space between the cylinder and the frame.
[0158] The cylinder may include a cylinder body including a nozzle part or nozzle, and a cylinder flange part or flange that extends outward from the cylinder body in a radial direction. The frame may include a frame body that surrounds the cylinder body; a recess or recess part, into which the flange part of the cylinder can be inserted; and a seat portion or seat that faces a seating surface of the flange portion of the cylinder.
[0159] The passage may include a first passage defined between an outer circumferential surface of the cylinder flange part and an inner circumferential surface of the recess part. The passage may include a second passage defined between the seating surface of the flange portion of the cylinder and the seat portion of the frame.
[0160] The passage may include a third passage extending from the second passage into a space between an outer circumferential surface of the cylinder body and an inner circumferential surface of the frame body. The cylinder body may additionally include a nozzle portion or nozzle into which coolant may be introduced, and at least a portion of the coolant flowing into the third passage may flow towards an inner circumferential surface of the cylinder through the nozzle portion. - lime
[0161] Details of one or more implementations are shown in the accompanying drawings and description. Other aspects appear in the description, drawings and claims.
[0162] Any reference in this report to "an embodiment", "exemplary embodiment", etc., means that a specific aspect, structure or feature described in connection with the embodiment is included in at least one embodiment of the invention. The occurrence of these expressions in various parts of the descriptive report does not necessarily refer to the same concretization. Furthermore, when a specific aspect, structure or feature is described in connection with any embodiments, it is suggested that it is within the skill of the art to effect such aspect, structure or feature in connection with other of the embodiments.
[0163] While the embodiments have been described with reference to a number of illustrative embodiments of the present invention, it should be understood that various other modifications and embodiments, which fall within the spirit and scope of the principles of the present disclosure, may be devised by those skilled in the art. in the technique. More particularly, various variations and modifications are possible in the component parts and/or configurations of the present combination configuration within the scope of the disclosure, drawings and appended claims. In addition to variations and modifications in component parts and/or configurations, alternative uses will also be apparent to those skilled in the art.

权利要求:
Claims (10)
[0001]
1. Linear compressor, comprising: a housing (101); a cylinder (120) provided in the housing (101) for defining a compression space for a refrigerant; a piston (130) reciprocally moved in an axial direction within the cylinder (120); a discharge valve (161) provided at one end of the cylinder (120) for selectively discharging compressed refrigerant into the compression space; at least one nozzle (122) arranged in the cylinder (120) for introducing at least a part of the discharged refrigerant through the discharge valve (161) in the cylinder (120); and a frame (110) coupled to an exterior of the cylinder (120); a passage for guiding the discharged refrigerant from the discharge valve (161) to the at least one nozzle (123), wherein the passage is defined between an outer circumferential surface of the cylinder (120) and an inner circumferential surface of the frame (120). 110), and wherein the cylinder (120) comprises a cylinder body (121) comprising at least one nozzle (123) and having a cylindrical shape and a cylinder flange (125) extending outwardly from of the cylinder body (121) in a radial direction, the frame (110) comprising a frame body (111) surrounding the cylinder body (121), a recess (117) in which the cylinder flange (125) is and a seat (113) extending inwardly from the recess (117) in the radial direction and on which a seating surface (127) of the cylinder flange (125) is seated, the passageway comprises a second passageway (420). ) defined between the seat (113) and the seating surface (127) of the cylinder flange (125), CHARACTERIZED The fact that a filter (320) is ring-shaped and is installed in the second passage (420), and that the cylinder flange (125) pushes on the filter (320) when the filter (320) is seated in the seat (113) and the cylinder (120) is coupled to the frame (110).
[0002]
2. Linear compressor, according to claim 1, CHARACTERIZED in that the passage comprises a first passage (410) defined between an external circumferential surface of the cylinder flange (125) and an internal circumferential surface of the recess (117).
[0003]
3. Linear compressor, according to claim 1, CHARACTERIZED by the fact that the filter (320) comprises a felt formed from polyethylene terephthalate (PET) fiber or an adsorption paper.
[0004]
4. Linear compressor, according to claim 1, CHARACTERIZED in that the passage additionally comprises a third passage (430) extending from the second passage (420) into a space between an outer circumferential surface of the cylinder body (121) and an inner circumferential surface of the frame body (111).
[0005]
5. Linear compressor, according to claim 4, CHARACTERIZED in that it additionally comprises at least one gas inlet (122) recessed from the outer circumferential surface of the cylinder body (121) to communicate with the at least one nozzle (123), wherein at least a portion of the refrigerant flowing into the third passage (430) flows toward the inner circumferential surface of the cylinder body (121) through the at least one gas inlet (122) and the at least a mouthpiece (123).
[0006]
6. Linear compressor, according to claim 5, CHARACTERIZED in that it additionally comprises a filter (330) installed in at least one gas inlet (122), the filter (330) comprising a thread.
[0007]
7. Linear compressor, according to claim 6, CHARACTERIZED in that it additionally comprises: a sealing pocket (370) that communicates with the third passage (430); and a sealing member (350) movably installed in the sealing pocket (370) to seal a space between the inner circumferential surface of the frame (110) and the outer circumferential surface of the cylinder (120).
[0008]
8. Linear compressor, comprising: a housing (101); a cylinder (120) provided in the housing (101) to define a compression space for a refrigerant, the cylinder (120) comprising a cylinder body (121) having a cylindrical shape, and a cylinder flange (125) extending out from the cylinder body (121) in a radial direction; a piston (130) reciprocally moved in an axial direction within the cylinder (120); a discharge valve (161) provided at one end of the cylinder (120) for selectively discharging compressed refrigerant into the compression space; at least one nozzle (123) arranged in the cylinder (120) for introducing at least a part of the discharged refrigerant through the discharge valve (161) into the cylinder (120); and a frame (110) coupled to the outside of the cylinder (120), the frame (110) comprising a frame body (111) surrounding the cylinder body (121), a recess (117) in which the cylinder flange (111) 125) is inserted, and a seat (113) extending inwardly from the recess (117) in the radial direction and on which a seating surface (127) of the cylinder flange (125) is seated; a passage for guiding discharged refrigerant from the discharge valve (161) to the at least one nozzle (122), wherein the passage includes: a first passage (410) defined between an outer circumferential surface of the cylinder flange (125) and an inner circumferential surface of the recess (117); a second passage (420) defined between the seat (113) of the frame (110) and the seating surface (127) of the cylinder flange (125); and a third passage (430) extending from the second passage (420) into a space between an outer circumferential surface of the cylinder body (121) and an inner circumferential surface of the frame body (111), and CHARACTERIZED in that that a filter (320) is ring-shaped and is installed in the second passage (420), and that the cylinder flange (125) pushes on the filter (320) when the filter (320) is seated in the seat (113). ) and the cylinder (120) is coupled to the frame (110).
[0009]
9. Linear compressor, according to claim 8, CHARACTERIZED in that it additionally comprises at least one gas inlet (122) recessed from the outer circumferential surface of the cylinder body (121) to communicate with the at least one nozzle (123), wherein at least a portion of the refrigerant flowing into the third passage (430) flows toward the inner circumferential surface of the cylinder body (121) through the at least one gas inlet (122) and the at least a mouthpiece (123).
[0010]
10. Linear compressor, according to claim 8, CHARACTERIZED in that it additionally comprises: a sealing pocket (370) that communicates with the third passage (430); and a sealing member (350) movably installed in the sealing pocket (370) to seal a space between the inner circumferential surface of the frame (110) and the outer circumferential surface of the cylinder (120).

类似技术:

公开号 | 公开日 | 专利标题

BR102015011521B1|2022-01-25|linear compressor

US10352313B2|2019-07-16|Linear compressor

BR102015015403A2|2016-06-28|linear compressor and cold room comprising a linear compressor

US9890779B2|2018-02-13|Linear compressor

US20160017876A1|2016-01-21|Linear compressor

KR102306857B1|2021-09-30|A linear compressor

US9890772B2|2018-02-13|Linear compressor

US9982926B2|2018-05-29|Cooling system and refrigerator including a cooling system

KR102240009B1|2021-04-14|Linear compressor and refrigerator including the same

US10968907B2|2021-04-06|Linear compressor

US9989051B2|2018-06-05|Linear compressor

KR102233594B1|2021-03-30|Linear compressor and refrigerator including the same

同族专利:

公开号 | 公开日

KR20160000324A|2016-01-04|

CN105298793B|2019-02-05|

EP2960505A3|2016-03-23|

US20150369224A1|2015-12-24|

EP2960505B1|2018-06-13|

KR102191193B1|2020-12-15|

EP2960505A2|2015-12-30|

JP6594650B2|2019-10-23|

BR102015011521A2|2016-07-05|

US9863410B2|2018-01-09|

CN105298793A|2016-02-03|

JP2016008606A|2016-01-18|

引用文献:

公开号 | 申请日 | 公开日 | 申请人 | 专利标题

US3542202A|1969-04-11|1970-11-24|Technical Fabricators|Filter unit|

BR9606479A|1995-06-23|1997-09-30|Lg Electronics Inc|Oil supply apparatus for a friction part of a linear compressor|

US6273688B1|1998-10-13|2001-08-14|Matsushita Electric Industrial Co., Ltd.|Linear compressor|

KR100504910B1|2002-12-20|2005-07-29|엘지전자 주식회사|Reciprocating compressor for refrigerator|

DE102006009274A1|2006-02-28|2007-08-30|BSH Bosch und Siemens Hausgeräte GmbH|Linear compressor for cooling device has compressor piston mounted in piston housing with aid of housing with openings, gaseous fluid flowing through openings, outflow device for fluid condensate|

DE102006042021A1|2006-09-07|2008-03-27|BSH Bosch und Siemens Hausgeräte GmbH|Compressor with gas-bearing piston|

DE102006052447A1|2006-11-07|2008-05-08|BSH Bosch und Siemens Hausgeräte GmbH|Linear compressor and gas pressure bearing for it|

KR101307688B1|2007-11-01|2013-09-12|엘지전자 주식회사|Linear compressor|

KR101299553B1|2011-09-06|2013-08-23|엘지전자 주식회사|Reciprocating compressor with gas bearing|

EP2700816B1|2012-08-24|2016-09-28|LG Electronics Inc.|Reciprocating compressor|KR100702509B1|2006-11-15|2007-04-02|대광기술단|Connecting structure of a telegraph pole|

KR102238332B1|2016-04-19|2021-04-09|엘지전자 주식회사|Linear compressor|

KR102238333B1|2016-04-28|2021-04-09|엘지전자 주식회사|Linear compressor|

KR102238346B1|2016-05-03|2021-04-09|엘지전자 주식회사|Linear compressor|

KR102238347B1|2016-05-03|2021-04-09|엘지전자 주식회사|Linear compressor|

KR102259654B1|2016-05-03|2021-06-02|엘지전자 주식회사|Linear compressor|

KR102257479B1|2016-05-03|2021-05-31|엘지전자 주식회사|Linear compressor|

KR102257499B1|2016-05-03|2021-05-31|엘지전자 주식회사|Linear compressor and a method for manufacturing the same|

KR102238334B1|2016-05-03|2021-04-09|엘지전자 주식회사|Linear compressor|

KR102238345B1|2016-05-03|2021-04-09|엘지전자 주식회사|Linear compressor|

KR20180082248A|2017-01-10|2018-07-18|엘지전자 주식회사|Linear compressor|

KR20180092630A|2017-02-10|2018-08-20|엘지전자 주식회사|Linear compressor|

KR102300212B1|2017-06-21|2021-09-10|엘지전자 주식회사|Linear compressor|

EP3473855B1|2017-09-28|2021-03-10|LG Electronics Inc.|Linear compressor|

KR20190118427A|2018-04-10|2019-10-18|엘지전자 주식회사|Linear compressor|

KR102088331B1|2018-07-03|2020-03-12|엘지전자 주식회사|Linear compressor|

KR102067602B1|2018-08-20|2020-01-17|엘지전자 주식회사|Linear compressor and method for controlling linear compressor|

KR102204575B1|2018-11-09|2021-01-19|엘지전자 주식회사|Linear compressor|

KR20200091710A|2019-01-23|2020-07-31|엘지전자 주식회사|Linear compressor|

KR102217342B1|2019-02-12|2021-02-19|엘지전자 주식회사|Linear compressor|

KR20210022930A|2019-08-21|2021-03-04|엘지전자 주식회사|Non-azeotropic mixed refrigerant, and refrigerating apparatus using the same|

KR102244391B1|2019-10-04|2021-04-26|엘지전자 주식회사|Compressor|

法律状态:
2016-07-05| B03A| Publication of a patent application or of a certificate of addition of invention [chapter 3.1 patent gazette]|

2018-10-30| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|

2020-05-05| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|

2021-12-07| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|

2022-01-25| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 19/05/2015, OBSERVADAS AS CONDICOES LEGAIS. |

优先权:

申请号 | 申请日 | 专利标题

KR1020140077559A|KR102191193B1|2014-06-24|2014-06-24|A linear compressor|

KR10-2014-0077559|2014-06-24|

[返回顶部]