西班牙专利ES2716627A1 Air conditioner

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专利摘要:
Provided is an air conditioner wherein devices, including indoor fans, can be cleaned. An air conditioner (100) comprises an indoor heat exchanger (15), an indoor fan (16), a condensation receiving plate (18) arranged under the indoor heat exchanger, and a fan cleaning unit (24) that is arranged between the indoor heat exchanger (15) and the indoor fan (16), and that cleans the indoor fan (16). The indoor heat exchanger (15) and/or the condensation receiving plate (18) is located under the fan cleaning unit (24). Thus, devices, including indoor fans, can be cleaned.
公开号:ES2716627A1
申请号:ES201890058
申请日:2018-01-18
公开日:2019-06-13
发明作者:Hisashi Daisaka；Jiaye Cai；Keisuke Fukuhara；Kosuke Ohnishi；Tomohiro Kato；Akitoshi Kawazoe；Kazuma Hosokawa；Kazuo Odate
申请人:Hitachi Johnson Controls Air Conditioning Inc；
IPC主号:

专利说明:

[0001]
[0002]
[0003]
[0004] Technical field
[0005]
[0006] The present invention relates to an air conditioner.
[0007]
[0008] State of the art
[0009]
[0010] As a technique for cleaning an indoor fan (fan) of an air conditioner, Patent Document 1 discloses, for example, "a fan cleaning device for removing dust adhered to a fan." In addition, Figure 1 in Patent Document 1 illustrates a fan cleaning device arranged around an outlet of an indoor fan.
[0011]
[0012] Documents of the state of the art
[0013]
[0014] Patent documents
[0015]
[0016] Patent Document 1: Japanese Patent Application Publication No. 2007-071210
[0017]
[0018] Description of the invention
[0019]
[0020] Problems to solve
[0021]
[0022] In the technique described in Patent Document 1, the fan cleaning device is arranged around the outlet of the indoor fan, as described above. Accordingly, scraped dust from the indoor fan by the fan cleaning device can be blown out in the space to be conditioned during the subsequent air conditioning operation. What is desired is a technique of cleaning components such as an indoor fan, including the components an indoor heat exchanger, while also providing the comforts of air conditioning, but such a technique is not described in the Patent 1
[0023] Next, the present invention aims to provide an air conditioner that cleans components that include an indoor fan.
[0024]
[0025] Solution to problems
[0026]
[0027] In order to solve the problems identified above, an air conditioner according to the present invention includes: an indoor heat exchanger; an indoor fan; a condensation receiving tray that is placed below the indoor heat exchanger; a fan cleaner that is disposed between the indoor heat exchanger and the indoor fan to clean the indoor fan, in which at least one of the indoor heat exchanger and the condensation receiving tray is located below the fan cleaner.
[0028]
[0029] As an alternative, an air conditioner according to the present invention includes: an indoor heat exchanger; an indoor fan; a dust receptacle that is placed below the indoor heat exchanger; and a fan cleaner that is disposed between the indoor heat exchanger and the indoor fan to clean the indoor fan, wherein at least one of the indoor heat exchanger and the dust receptacle is located below the fan cleaner.
[0030]
[0031] Advantageous effects of the invention
[0032]
[0033] The present invention provides an air conditioner that cleans components including an indoor fan.
[0034]
[0035] Brief description of the figures
[0036]
[0037] Figure 1 illustrates a refrigerant circuit of an air conditioner according to an embodiment of the present invention.
[0038] Figure 2 is a longitudinal sectional view of an indoor unit included in the air conditioner according to the embodiment of the present invention.
[0039] Figure 3 is a perspective view of the indoor unit, having a portion thereof cut away, of the air conditioner according to the embodiment of the invention. Figure 4 illustrates an air flow around a fan cleaner, during the air conditioning operation, in the air conditioner according to the embodiment of the present invention.
[0040] Figure 5 is a functional block diagram of the air conditioner according to the embodiment of the present invention.
[0041] Figure 6 is a flow chart of a process executed by an air conditioner controller in accordance with the embodiment of the present invention.
[0042] Figure 7A illustrates the indoor fan being cleaned in the air conditioner according to the embodiment of the present invention.
[0043] Figure 7B illustrates an indoor heat exchanger thawing in the air conditioner according to the embodiment of the present invention.
[0044] Figure 8 is a longitudinal sectional view of an indoor unit included in an air conditioner according to a modification of the present invention.
[0045] Figure 9 is a schematic perspective view of an indoor fan and a fan cleaner included in an air conditioner according to another modification of the present invention.
[0046]
[0047] Detailed description of the embodiments
[0048]
[0049] <Air conditioner configuration>
[0050]
[0051] Figure 1 illustrates a refrigerant circuit Q of an air conditioner 100 according to one embodiment. Note that the continuous arrow lines in Figure 1 indicate a flow of a refrigerant during the heating operation. In addition, the dashed arrow lines in Figure 1 indicate a flow of refrigerant during the cooling operation. As shown in Figure 1, the air conditioner 100 includes a compressor 11, an outdoor heat exchanger 12, an outdoor fan 13 and an expansion valve 14. In addition to the components described above, the air conditioner 100 further includes an indoor heat exchanger 15, an indoor fan 16, and a four-way valve 17.
[0052]
[0053] The compressor 11 is a device that is driven by a compressor motor 11a to compress gas refrigerant at low temperature, low pressure, and discharges it as high temperature, high pressure gas refrigerant. The outdoor heat exchanger 12 is a heat exchanger that exchanges heat between a refrigerant flowing through a heat transfer tube (not shown) and the ambient air supplied from the fan 13.
[0054]
[0055] The external fan 13 is a fan that is driven by a fan motor 13a outside to feed the ambient air to the outdoor heat exchanger 12, and is disposed throughout the outdoor heat exchanger 12. The expansion valve 14 is a valve that decompresses the condensed refrigerant by a "condenser" (one of the outdoor heat exchanger) 12 and the indoor heat exchanger 15). Note that the decompressed refrigerant in the expansion valve 14 is guided to an "evaporator" (the other of the outdoor heat exchanger 12 and the indoor heat exchanger 15).
[0056]
[0057] The indoor heat exchanger 15 is a heat exchanger that exchanges heat between the refrigerant flowing through the heat transfer tubes "g" (see Figure 2) and the indoor air (air in the space to be conditioned) fed from the indoor fan 16. The indoor fan 16 is a fan that is driven by a motor 16c of the indoor fan (see Figure 5) to feed the indoor air to the indoor heat exchanger 15, and is disposed throughout the indoor heat exchanger 15 More specifically, in the air flow when the indoor fan 16 is rotating in the normal direction, the indoor fan 16 is arranged on the downstream side of the indoor heat exchanger 15.
[0058]
[0059] The four-way valve 17 is a valve that changes the flow path of refrigerant according to the mode of operation of the air conditioner 100. During the cooling operation (see dashed arrow lines in Figure 1), for example, the refrigerant circulates through the refrigeration cycle in the refrigerant circuit Q having the compressor 11, the outdoor heat exchanger 12 (condenser), the expansion valve 14 and the indoor heat exchanger 15 (evaporator) connected sequentially through the four-way valve 17 to form a circular shape.
[0060]
[0061] On the contrary, during the heating operation (see lines with continuous arrow in Figure 1), the refrigerant circulates through the refrigeration cycle in the refrigerant circuit Q having the compressor 11, the indoor heat exchanger 15 (condenser ), the expansion valve 14 and the outdoor heat exchanger 12 (evaporator) connected sequentially through the four-way valve 17 to form a circular shape.
[0062]
[0063] Note that in the example shown in Figure 1, the compressor 11, the outdoor heat exchanger 12, the outdoor fan 13, the expansion valve 14 and the four-way valve 17 are arranged in an outdoor unit Uo. In contrast, the indoor heat exchanger 15 and the indoor fan 16 are arranged in a unit inside Ui.
[0064]
[0065] Figure 2 is a longitudinal sectional view of the indoor unit Ui. Note that Figure 2 shows a cleaner 24 of the fan in a state without cleaning the indoor fan 16. In addition to the indoor heat exchanger 15 and the indoor fan 16 as described above, the indoor unit Ui includes a condensation receiving tray 18, a housing base 19, filters 20a and 20b, a front panel 21, a horizontal ventilation grill 22, a vertical ventilation grill 23, and the fan cleaner 24.
[0066]
[0067] The inner heat exchanger 15 has fins "f" and heat transfer tubes "g" that penetrate the fins "f". In addition, from another aspect, the indoor heat exchanger 15 has a front interior heat exchanger 15a and a rear interior heat exchanger 15b. The front interior heat exchanger 15a is disposed on a front side of the indoor fan 16. In contrast, the rear indoor heat exchanger 15b is disposed on a rear side of the indoor fan 16. An upper end of the front indoor heat exchanger 15a is connects to an upper end of the rear interior heat exchanger 15b.
[0068]
[0069] The condensation receiving tray 18 receives the condensed water in the indoor heat exchanger 15, and is placed below the indoor heat exchanger 15 (front indoor heat exchanger 15a in the example shown in Figure 2).
[0070]
[0071] The inner fan 16 is, for example, a cylindrically shaped cross flow fan, and is disposed throughout the indoor heat exchanger 15. The indoor fan 16 includes fan blades 16a, a partition plate 16b on which these blades of fan 16a are set, and a motor 16c of the indoor fan (see Figure 5) as a drive source.
[0072]
[0073] Note that the inner fan 16 is preferably coated with a hydrophilic coating agent. Such a coating material can include a solution of silica dispersed in isopropyl alcohol, as a hydrophilic material, added with a binder (silicon compound having a hydrolysable group), butanol, tetrahydrofuran and an antimicrobial agent.
[0074]
[0075] This form is a hydrophilic film on an inner fan surface 16 to make that the surface of the indoor fan 16 has a lower electrical resistance value, preventing the powder from easily adhering to the indoor fan 16. That is, the static electricity caused by the friction with the air hardly occurs on the surface of the indoor fan 16 while that the indoor fan 16 is being operated, to prevent the powder from adhering to the indoor fan 16. In this way, the coating agent as described above also serves as an antistatic agent for the indoor fan 16.
[0076]
[0077] The housing base 19 of Figure 2 is a housing in which are arranged devices such as the indoor heat exchanger 15 and the indoor fan 16. The filter 20a filters the dust from the air flowing to a front air inlet h1, and is disposed on the front side of the indoor heat exchanger 15. The filter 20b filters the dust from the air flowing into an upper air inlet h2, and is disposed on the upper side of the indoor heat exchanger 15.
[0078]
[0079] The front panel 21 is a panel arranged to cover the filter 20a on the front side, and to pivot forward on its lower end like an axis. Note that the front panel 21 can be configured not to pivot.
[0080]
[0081] The horizontal ventilation grille 22 is a plate member that regulates a side-to-side flow of blown air into a room as the indoor fan 16 is rotated. The horizontal ventilation grid 22 is arranged in a blown air flow conduit h3 and is arranged so that it can pivot from side to side by a motor 25 of the horizontal ventilation grid (see Figure 5). The vertical ventilation grid 23 is a plate member that regulates a vertical flow of the air blown into the room as the indoor fan 16 is rotated. The vertical ventilation grille 23 is arranged around an air outlet h4 and is arranged so that it can pivot vertically by a motor 26 of the vertical ventilation grille (see Figure 5).
[0082]
[0083] The air sucked through the air inlets h1 and h2 exchanges heat with the refrigerant flowing through the heat transfer tubes "g" of the indoor heat exchanger 15, and the air exchanged with heat is directed to the exhaust duct. blown air flow h3 The air flowing through the blown air flow conduit h3 is guided in a predetermined direction by the horizontal ventilation grille 22 and the vertical ventilation grille 23, and is further blown into the room through of the air outlet h4.
[0084] Note that most of the dust going to the air outlets h1, h2 as the air flows is collected by the filters 20a, 20b. However, occasionally fine dust can pass through the filters 20a, 20b and adhere to the indoor heat exchanger 15 and the indoor fan 16. Accordingly, the indoor heat exchanger 15 and the indoor fan 16 are desirably cleaned on a regular basis . Next, the present embodiment is designed to rinse the indoor heat exchanger 15 with water, after the indoor fan 16 is cleaned by the fan cleaner 24 which will be described below.
[0085]
[0086] The cleaner 24 of the fan in Figure 2 cleans the indoor fan 16, and is disposed between the indoor heat exchanger 15 and the indoor fan 16. More specifically, the fan cleaner 24 is disposed in a recess "r" of the indoor heat exchanger. inner frontal heat 15a having a dog leg shape in the longitudinal cross-sectional view. In the example shown in Figure 2, the indoor heat exchanger 15 (lower part of the front indoor heat exchanger 15a) and the condensation receiving tray 18 are located below the cleaner 24 of the fan.
[0087]
[0088] Figure 3 is a perspective view of the indoor unit Ui having a portion thereof cut away. The fan cleaner 24 includes, in addition to a shaft 24a and a brush 24b shown in FIG. 3, a motor 24c of the fan cleaner (see FIG. 5). The shaft 24a is a bar-like member parallel to an axial direction of the inner fan 16, and both ends of the shaft 24a are pivotally supported.
[0089]
[0090] The brush 24b removes the dust adhering to the blade 16a of the fan, and is fixed to the shaft 24a. The motor 24c of the fan cleaner (FIG. 5) is, for example, a stepper motor and has the function of rotating the shaft 24a at a predetermined angle.
[0091]
[0092] When the indoor fan 16 is cleaned by the fan cleaner 24, the motor 24c of the fan cleaner (see FIG. 5) is operated such that the brush 24b is brought into contact with the indoor fan 16 (see FIG. 7A), and the internal fan 16 rotates inversely. Once the cleaning of the indoor fan 16 by the fan cleaner 24 has been completed, the fan cleaner motor 24c is actuated again to pivot the brush 24b so that the brush 24b is separated from the indoor fan 16 (see Figure 2).
[0093]
[0094] In the present embodiment, the front edge of the brush 24b is made to face the interior heat exchanger 15, as shown in Figure 2, except when cleaning the indoor fan 16. More specifically, the brush 24b is separated from the indoor fan 16 so as to be oriented in the lateral (substantially horizontal) direction, except when the interior fan 16 is cleaned (even during normal operation of the air conditioner). The reason for arranging the fan cleaner 24 in this manner will be described with reference to Figure 4.
[0095]
[0096] Figure 4 illustrates an air flow around the cleaner 24 of the fan during the air conditioning operation. Note that the direction of each line with arrow in Figure 4 indicates the direction of air flow. In addition, the length of each line with arrow indicates the speed of the air flow. During normal operation of the air conditioner, the indoor fan 16 is rotated in the normal direction so that the air passing through the spaces between the fins "f" of the front indoor heat exchanger 15a flows into the indoor fan 16. In particular, around the recess "r" of the front inner heat exchanger 15a, the air flows in the lateral direction (substantially horizontal direction) towards the indoor fan 16 as shown in Figure 4.
[0097]
[0098] The cleaner 24 of the fan is located in the recess "r" in order to have the brush 24b oriented in the lateral direction, as described above. In other words, during normal operation of the air conditioner, the brush 24b is oriented parallel to an air flow direction. As described above, the direction of extension of the brush 24b is substantially parallel to the direction of the air flow, and therefore the cleaner 24 of the fan almost does not hinder the flow of air.
[0099]
[0100] In addition, the fan cleaner 24 is arranged in an upstream area instead of an intermediate current area or a downstream area of the air flow (near the air outlet h4 in Figure 2) when the indoor fan 16 is made Turn in the normal direction. Next, the air flowing in the lateral direction along the brush 24b is accelerated by the blades 16a of the fan, and the accelerated air is directed to the air outlet h4 (see Figure 2). As described above, the cleaner 24 of the fan is arranged in an upstream area, in which the air flows at a relatively low speed, to reduce a decrease in the volume of air caused by the cleaner 24 of the fan. Note that the cleaner 24 of the fan can be maintained in the same position as in Figure 4, even when the indoor fan 16 is stopped.
[0101]
[0102] Figure 5 is a functional block diagram of the air conditioner 100. The unit Inside Ui of Figure 5 includes, in addition to the components described above, a remote control transceiver 27 and the indoor control circuit 31. The remote control transceiver 27 exchanges predetermined information with a remote controller 40. Although not shown, the Internal control circuit 31 includes a CPU (Central Processing Unit), a ROM (read-only memory), a RAM (random access memory) and electronic circuits, as several interfaces. The programs stored in the ROM are recovered and loaded into the RAM of the CPU to execute several processes.
[0103]
[0104] As shown in Figure 5, the indoor control circuit 31 includes a storage unit 31a and an indoor control unit 31b. The storage unit 31a stores, in addition to the predetermined programs, the data received through the remote control transceiver 27, the values detected by various sensors (not shown), and the like. The indoor control unit 31b drives the motor 24c of the fan cleaner, the motor 16c of the indoor fan, the motor 25 of the horizontal ventilation grid, the motor 26 of the vertical ventilation grid, and the like, based on the stored data in the storage unit 31a.
[0105]
[0106] The outdoor unit Uo includes, in addition to the components, as described above, an external control circuit 32. Although not shown, the external control circuit 32 includes a CPU, a ROM, a RAM and electronic circuits such as several interfaces, and is connected to the indoor control circuit 31 through a communication line. As shown in Figure 5, the external control circuit 32 includes a storage unit 32a and an external control unit 32b.
[0107]
[0108] The storage unit 32a stores, in addition to the predetermined programs, the data received from the indoor control circuit 31, and the like. The outdoor control unit 32b controls the motor 11a of the compressor, the motor 13a of the outdoor fan, the expansion valve 14 and the like, based on the data stored in the storage unit 32a. Hereinafter, the indoor control circuit 31 and the external control circuit 32 are collectively referred to as "controller 30".
[0109]
[0110] Figure 6 is a flowchart of a process executed by the controller 30 (see Figure 2 according to the case). Note that the air conditioning is assumed not to work in "START" in Figure 6, and the brush 24b has its front edge facing the front interior heat exchanger 15a (position in Figure 2).
[0111] In step S101 in Figure 6, the controller 30 cleans the indoor fan 16 by the fan cleaner 24. Note that an activator for initiating cleaning of the indoor fan 16 will, for example, be a condition that the accumulated time of the air conditioning operation since the last cleaning has reached predetermined time.
[0112]
[0113] Figure 7A illustrates the indoor fan 16 being cleaned. Note that Figure 7A shows the indoor heat exchanger 15, the indoor fan 16 and the condensation receiving tray 18, but other members are not shown. The controller 30 controls the wiper 24 of the fan to come into contact with the indoor fan 16, and controls the indoor fan 16 to rotate it in a direction opposite to that which it has during the air conditioning operation (reverse direction).
[0114]
[0115] That is, the controller 30 controls the brush 24b that is pivoted about the axis 24a at approximately 180 degrees from the position where the brush 24b has a front end facing the indoor heat exchanger 15 (see Figure 2), so that that the brush 24b has its front end facing the internal fan 16 (see Figure 7A). This causes the brush 24b to come into contact with the blade 16a of the fan of the inner fan 16.
[0116]
[0117] Note that in the example of Figure 7A, as indicated by a chain line of a point L, the indoor heat exchanger 15 (front interior heat exchanger) 15a), as well as the condensation receiving tray 18 is located below a contact position K in the state of the cleaner 24 of the fan in contact with the indoor fan 16.
[0118]
[0119] As described above, the inner fan 16 is rotated in the reverse direction to cause the front edge of the brush 24b to deflect as the blade 16a of the fan moves, so that the brush 24b is pressed to strike the brush. rear surface of fan blade 16a. Next, the dust accumulated around the front edge of the fan blade 16a (the end in the radial direction) is removed by the brush 24b.
[0120]
[0121] In particular, the dust tends to accumulate around the front edges of the blades 16a of the fan. This is because the blade 16a of the fan is struck with air on its front surface around the front edge, during the air conditioning operation having the inner fan 16 rotated in the normal direction L (see Figure 4), for causing the powder to adhere to fan blade 16a around the front edge. The air that hits the fan blade 16a around the front edge passes through the space between the adjacent fan blades 16a to flow along the curved front surface of the fan blade 16a.
[0122]
[0123] In the present embodiment, as described above, the brush 24b is brought into contact with the fan blade 16a, and then the inner fan 16 is rotated in the reverse direction. This causes the brush 24b to come into contact with the rear surface of the fan blade 16a around the front edge, whereby the dust accumulated on both the front and rear surfaces, around the front edge, of the fan blade 16a is It eliminates collectively. As a result, most of the dust accumulated in the indoor fan 16 is removed.
[0124]
[0125] Further, causing the indoor fan 16 to rotate in the reverse direction generates a smooth air flow in a direction opposite to that in the normal direction (see Figure 4) within the indoor unit Ui (see Figure 2). Accordingly, the dust "j" removed from the indoor fan 16 is not directed to the air outlet h4 (see Figure 2), and is guided to the condensation receiving tray 18, as shown in Figure 7A, through of the space between the front interior heat exchanger 15a and the indoor fan 16.
[0126]
[0127] More specifically, the powder "j" extracted from the indoor fan 16 by the brush 24b is pressed lightly against the indoor heat exchanger 15a by the wind pressure. Next, the powder "j" falls into the condensation receiving tray 18 along the inclined surface (the edge of the fin "f") of the front interior heat exchanger 15a (see a line with arrow in the Figure 7A). Therefore, the powder "j" barely adheres to the rear surface of the vertical ventilation grille 23 (see Figure 2) through a tiny gap between the indoor fan 16 and the condensation receiving tray 18. This avoids that the powder "j" is injected into the room during the next air conditioning operation.
[0128]
[0129] Note that the powder "j" removed from the indoor fan 16 may partially adhere to the front indoor heat exchanger 15a without falling into the condensation receiving tray 18. The powder "j" adhered to the front indoor heat exchanger 15a in this manner is lava by the process of step S103 which will be described later.
[0130]
[0131] In addition, while the indoor fan 16 is cleaned, the controller 30 can control the inner fan 16 to operate at the speed of rotation in the medium to high speed range, or can control that the indoor fan 16 is driven at the speed of rotation in the low speed range. The speed of rotation of the indoor fan 16 in the medium to high speed range is, for example, 300 min-1 or more and less than 1700 min-1. Turning the inner fan 16 rotated in the medium to high speed range allows the powder "j" to be easily directed to the front indoor heat exchanger 15a, whereby powder "j" barely adheres to the rear surface of the vertical ventilation grid 23 (see Figure 2), as described above. Therefore, this prevents the powder "j" from blowing into the room during the next air conditioning operation.
[0132]
[0133] The speed of rotation of the indoor fan 16 in the low speed range is, for example, 100 min-1 or more and less than 300 min-1. Making the indoor fan 16 rotate at a low speed range allows the indoor fan 16 to be cleaned with a low noise level.
[0134]
[0135] In step S102 after the process of step S101 is finished in Figure 6, the controller 30 controls the fan cleaner 24 to move it. That is, the controller 30 controls the brush 24b to make it pivot 180 degrees about the axis 24a of the position in which the front edge of the brush 24b faces toward the indoor fan 16 (see Figure 7A), so that the front edge of the brush 24b is oriented towards the inner heat exchanger 15 (see Figure 7B). This prevents the fan cleaner 24 from interfering with the air flow during the subsequent air conditioning operation.
[0136]
[0137] Next in step S103, the controller 30 controls the indoor heat exchanger 15 to freeze and thaw sequentially. First, the controller 30 controls the indoor heat exchanger 15 to serve as an evaporator to freeze moisture contained in the air taken in the indoor unit Ui in the indoor heat exchanger 15 for freezing. Note that the freezing of the indoor heat exchanger 15 is included in a wording "causing the condensed water to adhere" to the indoor heat exchanger 15.
[0138]
[0139] While the indoor heat exchanger 15 is frozen, the controller 30 preferably controls the evaporation temperature of the refrigerant flowing to the indoor heat exchanger 15 to reduce it. That is, while controlling the indoor heat exchanger 15 to serve as an evaporator to self-freeze (make the water condensed to adhere to itself), the controller 30 controls the pressure of the refrigerant flowing to the indoor heat exchanger 15 to be regulated so that the evaporating temperature of the refrigerant is lower than it has during the normal operation of the air conditioner.
[0140]
[0141] The controller 30 controls the opening level of the expansion valve 14 (see Figure 1) to reduce it, for example, to allow the refrigerant having low pressure and low evaporation temperature to flow into the indoor heat exchanger 15. This allows that the frost and ice (symbol i shown in Figure 7B) grows easily in the indoor heat exchanger 15, so that the indoor heat exchanger 15 is washed with a large amount of water during subsequent defrosting.
[0142]
[0143] Further, in the indoor heat exchanger 15, an area below the cleaner 24 of the fan is preferably not an area downstream of the coolant flow through the indoor heat exchanger 15 (i.e., an upstream area or a intermediate current area). This allows the gas-liquid two-phase refrigerant with a low temperature to flow at least below the cleaner 24 of the fan, so that the frost and ice adhering to the indoor heat exchanger 15 increase in thickness. Accordingly, the indoor heat exchanger 15 is washed with a large amount of water during subsequent defrosting. Note that the region of the indoor heat exchanger 15 located below the fan cleaner 24 may have the scraped dust from the fan 16 by the fan cleaner 24 readily adhered thereto. Next, the gas-liquid two-phase refrigerant with low temperature in the region of the indoor heat exchanger 15 located below the fan cleaner 24 allows the frost and ice to grow easily, and the additional melting of such frost and ice allows that the powder in the indoor heat exchanger 15 is properly washed.
[0144]
[0145] Further, while controlling the indoor heat exchanger 15 to serve as an evaporator for self-freezing (causing the condensed water to adhere to itself), the controller 30 preferably controls the vertical ventilation grill 23 (see Figure 2) to be close to or orient to a direction higher than the horizontal direction. This prevents the low temperature air cooled by the indoor heat exchanger 15 from seeping into the room, so that the freezing of the indoor heat exchanger 15 and the like is executed, so as not to make the user feel uncomfortable.
[0146] After the indoor heat exchanger 15 is frozen in this manner (S103 in Figure 6), the controller 30 defrosts the indoor heat exchanger 15 (S103). For example, the controller 30 controls the devices to keep them stopped and allow the indoor heat exchanger 15 to naturally thaw to room temperature. Note that the control unit 30 can control the heating operation or the blow operation that will be executed to melt the frost and ice adhered to the indoor heat exchanger 15.
[0147]
[0148] Figure 7B shows that the indoor heat exchanger 15 being defrosted. When the indoor heat exchanger 15 is defrosted, the frost and ice adhered to the indoor heat exchanger 15 melts and a large amount of water w flows into the condensation receiving tray 18 along the fins "f". This is why the powder "j" adhering to the indoor heat exchanger 15 during the air conditioning operation is washed.
[0149]
[0150] Since the indoor fan 16 is cleaned with the brush 24b, the powder "j" adhering to the front indoor heat exchanger 15a is also removed by washing and flows down to the condensation receiving tray 18 (see the line below). arrow in Figure 7B). The water w flowing into the condensation receiving tray 18 is thus discharged to the outside through a drain hose (not shown), together with the powder "j" which has been dropped directly into the tray of condensation receiving 18 while cleaning the indoor fan 16 (see Figure 7A). As described above, a large amount of water flows downward during thawing of the indoor heat exchanger 15, and therefore, a drain hose (not shown) or the like is hardly clogged with the powder "j".
[0151]
[0152] Note that although not shown in Figure 6, the controller 30 can control the heating operation or the blow operation to be executed after the indoor heat exchanger 15 is frozen and thawed (S103), to dry the interior of the indoor unit Ui. This prevents bacteria from growing in the indoor heat exchanger 15 and the like.
[0153]
[0154] <Advantageous effects>
[0155]
[0156] According to the present embodiment, the indoor fan 16 is cleaned by the fan cleaner 24 (S101 in Figure 6) to prevent the powder "j" from blowing into the room.
[0157] In addition, the fan cleaner 24 is disposed between the front indoor heat exchanger 15a and the indoor fan 16 for guiding the scraped dust "j" of the indoor fan 16 by the brush 24b to the condensation receiving tray 18. Furthermore, the controller 30 controls the indoor fan 16 to rotate it in the reverse direction while the indoor fan 16 is cleaned. This prevents dust "j" from moving towards the air outlet h4.
[0158]
[0159] Additionally, the brush 24b is oriented in the lateral direction during normal operation of the air conditioner (see Figure 4), so as not to impede the flow of air under the influence of the brush 24b. Furthermore, this reduces the decrease in the volume of air caused by the cleaner 24 of the fan during normal operation of the air conditioner together with the fact that the cleaner 24 of the fan is arranged in the upstream area of the air flow, and it also prevents the energy consumption of the indoor fan 16 from increasing.
[0160]
[0161] Note that if a large amount of powder adheres to the indoor fan 16, the temperature for air blowing may be reduced in some cases during the cooling operation in order to compensate for the performance degradation of the indoor fan 16, to cause the condensation water dripping in the room. To cope with this situation, the indoor fan 16 is suitably cleaned in the present embodiment to reduce the decrease in the volume of air of the indoor fan 16 caused by the powder adhering thereto, as described above. Therefore, the present embodiment prevents dripping of condensation water caused by the powder in the indoor fan 16.
[0162]
[0163] In addition, the controller 30 controls the indoor heat exchanger 15 to sequentially perform freezing and thawing (S103 in Figure 6) to cause the powder "j" adhering to the indoor heat exchanger 15 to be washed with water "w" and flow down to the condensation receiving tray 18. In this way, the present embodiment cleans the indoor fan 16, and also cleans the indoor heat exchanger 15. Therefore, the air conditioner 100 provides an air conditioning comfortable. In addition, the air conditioner 100 reduces the time and effort of the user required to clean the indoor heat exchanger 15 and the indoor fan 16, and maintenance costs.
[0164] Modifications
[0165]
[0166] Heretofore, the embodiment of the air conditioner 100 according to the present invention has been described, but the present invention is not limited thereto and various modifications are possible. Figure 8 is a longitudinal sectional view of an indoor unit UAi of an air conditioner according to a modification. In the modification shown in Figure 8, a slot member M having a concave shape in longitudinal cross section is disposed below the front interior heat exchanger 15a. In addition, a rib 28 extending upwardly from the bottom surface of the slot member M is provided in the slot member M. The other features are the same as in the embodiment.
[0167]
[0168] In the slot member M shown in Figure 8, a front section of the rib 28 serves as a condensation receptacle 18A which receives condensed water from the indoor heat exchanger 15. In addition, a rear section of the rib 28 in the groove member M serves as a dust receptacle 29 which receives the dust falling from the indoor heat exchanger 15 and the indoor fan 16. The dust receptacle 29 is disposed below the indoor heat exchanger 15.
[0169]
[0170] Then, underneath the fan cleaner 24 are the indoor heat exchanger 15 (front indoor heat exchanger 15a), as well as the dust receptacle 29. More specifically, although not shown, located below a contact point wherein the cleaner 24 of the fan is in contact with the indoor fan 16, there are the indoor heat exchanger 15 and the dust receptacle 29. Even with such a configuration, the advantageous effects similar to those of the embodiment, such as described above, are obtained. Note that at the time of thawing the indoor heat exchanger 15, water flows down to the condensation receptacle 18A as well as to the powder receptacle 29. Consequently, there will be no difficulty in discharging the accumulated dust in the receptacle of the container. dust 29.
[0171]
[0172] Further, in the modification of Figure 8, the upper end of the rib 28 is not in contact with the front inner heat exchanger 15a, but is not limited to this configuration. That is, the upper end of the rib 28 may be in contact with the front inner heat exchanger 15a.
[0173]
[0174] Figure 9 is a schematic perspective view of the indoor fan 16 and a 24A cleaner of the fan included in an air conditioner according to another modification. In the modification shown in Figure 9, the wiper 24A of the fan includes a rod-shaped shaft 24d that is parallel to the axial direction of the inner fan 16, a brush 24e that sets the shaft 24d, a pair of supports 24f that they are disposed at both ends of the shaft 24b. In addition to these, although not shown, the fan cleaner 24A also includes a movement mechanism that moves the fan cleaner 24A as in the axial direction.
[0175]
[0176] As shown in Figure 9, the length of the cleaner 24A of the fan in the direction parallel to the axial direction of the indoor fan 16 is shorter than the axial length of the indoor fan 16 itself. The fan cleaner 24A is configured to move in the axial direction of the indoor fan 16 (right and left direction as seen from the front of the indoor unit), while cleaning the indoor fan 16. That is, the fan cleaner 24A is configured to sequentially clean the indoor fan 16 for each predetermined section corresponding to the length of the cleaner 24A of the fan in the axial direction of the indoor fan 16. Thus, this modification is configured to move the cleaner 24A of the fan having a length relatively short, to reduce the manufacturing cost of the air conditioner compared to the embodiment.
[0177]
[0178] Note that a bar (not shown) extending parallel to the axis 24d can be provided near the cleaner 24A of the fan (eg, above the shaft 24d), so that a predetermined movement mechanism (not shown) moves the cleaner 24A of the fan along the bar. In addition, the movement mechanism (not shown) can suitably pivot or translate the wiper 24A of the fan after cleaning by the fan wiper 24A, to move the wiper 24A away from the fan of the indoor fan 16.
[0179]
[0180] Further, a description of this type has been provided in the embodiment in which the controller 30 controls the cleaner 24 of the fan to come into contact with the indoor fan 16, and then controls the indoor fan 16 to rotate in a direction opposite to the that it has during the normal operation of the air conditioner (in reverse direction), but the present invention is not limited to this configuration. That is, the controller 30 can control the cleaner 24 of the fan to contact the indoor fan 16, and then control the indoor fan 16 to rotate it in the same direction as it does during normal operation of the air conditioner ( in the normal address).
[0181]
[0182] Placing the brush 24b in contact with the indoor fan 16 and then rotating the indoor fan 16 in a normal direction effectively eliminates powder adhesion to the fan blade 16a on its front surface around the front edge. Additionally, a circuit element for rotating the inner fan 16 in the reverse direction becomes unnecessary so that the manufacturing cost of the air conditioner 100 is reduced. Note that the speed of rotation when the indoor fan 16 is rotated in the Normal direction during cleaning can be any of the low speed range, medium speed range and high speed range as in the embodiment.
[0183]
[0184] Furthermore, a description of this type has been provided in the embodiment in which the brush 24b is pivoted on the axis 24a of the fan cleaner 24, but the present invention is not limited to this configuration. For example, the controller 30 can control the axis 24a to move towards the indoor fan 16 when the indoor fan 16 is cleaned, so that the brush 24b is brought into contact with the indoor fan 16. Then, the controller 30 can control that the shaft 24a moves away from the inner fan 16 to separate the brush 24b from the inner fan 16, after the cleaning of the inner fan 16 has been completed.
[0185]
[0186] Furthermore, a description of this type has been provided in the embodiment in which the fan cleaner 24 includes the brush 24b, but the present invention is not limited to the configuration. That is, a sponge or the like can be used as long as you can clean the indoor fan 16.
[0187]
[0188] Furthermore, a description of this type has been provided in the embodiment in which, in the indoor heat exchanger 15, the area below the fan cleaner 24 is not the downstream area of the refrigerant flow, but the present invention It is not limited to this configuration. For example, in the indoor heat exchanger 15, the area whose height is greater than that of the cleaner 24 of the fan may not be the downstream area of the flow of refrigerant flowing through the indoor heat exchanger 15 (i.e. area is the upstream area or the intermediate current area). More specifically, in the front indoor heat exchanger 15a, an area located on the downstream side of the air flow during normal operation of the air conditioner, whose height is greater than that of the air cleaner 24, is not, preferably, the area downstream of the flow of coolant flowing through the indoor heat exchanger 15. According to such a configuration, in the front indoor heat exchanger 15a, the thick frost adheres to the area located on the downstream side of the air flow during the operation normal of the air conditioner, whose height is greater than that of the fan cleaning section 24 (right side, in the plane of the paper, of the indoor heat exchanger 15a in Figure 2), as the indoor heat exchanger 15 freezes. Next, when the indoor heat exchanger 15 is subsequently defrosted, a large amount of water flows down through the fins "f". As a result, the powder (including dust removed from the indoor fan 16) adhering to the indoor heat exchanger 15 is washed in the condensation receiving tray 18.
[0189]
[0190] Still further, a description of this type has been provided in the embodiment in which the controller 30 controls the brush 24b of the cleaner 24 of the fan to be in contact with the indoor fan 16 while the indoor fan 16 is being cleaned, but the present invention is not limited to this configuration. That is, the controller 30 can control the brush 24b of the cleaner 24 of the fan to approach the indoor fan 16 while the indoor fan 16 is cleaned. More specifically, the controller 30 controls the brush 24b to approach the indoor fan 16 to such a degree that the dust, which has accumulated on the front edge of the fan blade 16a and has grown outward in the radial direction beyond dl front edge, it is removed. With such a configuration, the dust accumulated in the indoor fan 16 is properly removed as well.
[0191]
[0192] Still further, a description of this type has been provided in the embodiment in which the indoor heat exchanger 15 is frozen, followed by some other processing, to clean the indoor heat exchanger 15, but the present invention is not limited to this configuration. For example, the indoor heat exchanger 15 can be condensed, and the condensation water (condensed water) can be used to clean the indoor heat exchanger 15. For example, the controller 30 will calculate the room's air condensation point. based on the ambient air temperature and relative humidity. Next, the controller 30 will control the degree of opening of the expansion valve 14 and the like so that the temperature of the indoor heat exchanger 15 is equal to or less than the dew point and higher than the predetermined freezing temperature.
[0193]
[0194] The "freezing temperature" mentioned above is a temperature at which humidity contained in the indoor air initiates its freezing in the indoor heat exchanger 15 as the air temperature of the room is reduced. Condensing the indoor heat exchanger 15 thus allows washing the powder of the indoor heat exchanger 15 with the condensation water (condensed water).
[0195]
[0196] As an alterative, the controller 30 can control the indoor heat exchanger 15 to condense through cooling operation or dehumidification operation, and control the indoor heat exchanger 15 for washing with the condensation water (condensed water).
[0197]
[0198] Still further, a description of this type has been provided in the embodiment (see Figure 2) in which the indoor heat exchanger 15 and the condensation receiving tray 18 are located below the fan cleaner 24, but the present invention is not It is limited to this configuration. That is, at least one of the indoor heat exchanger 15 and the condensation receiving tray 18 can be found under the cleaner 24 of the fan. For example, in a configuration in which the lower portion of the indoor heat exchanger 15 having a dog leg shape in a longitudinal cross-sectional view extends in the vertical direction, the condensation receiving tray 18 can be located under (just below) the fan cleaner 24.
[0199]
[0200] Furthermore, a description of this type has been provided in the modification shown in Figure 8 in which the indoor heat exchanger 15 and the dust receptacle 29 are located below the fan cleaner 24, but the present invention is not limited to this configuration. That is, at least one of the indoor heat exchanger 15 and the dust receptacle 29 can be located below the cleaner 24 of the fan.
[0201]
[0202] Still further, a description of this type has been provided in the embodiment in which an indoor unit Ui (see Figure 1) and an outdoor unit Uo (see Figure 1) are provided, but the present invention is not limited to this configuration. That is, two or more indoor units connected in parallel can be provided, or two or more outdoor units connected in parallel can be provided. Additionally, in the embodiment, air conditioner 100 of the wall-hung type has been described, but the present invention can also be applied to other types of air conditioners.
[0203]
[0204] The embodiment has been described in detail for the purpose of illustrating the present invention, and the present invention is not necessarily limited to that which includes all the configurations described. In addition, part of the configuration in the embodiment can be removed, or added or replaced with another configuration. In addition, the mechanisms and configurations described above are those that are considered necessary for the illustration, and are not necessarily all the mechanisms and configurations of the product.
[0205]
[0206] Legend of reference numbers
[0207]
[0208] 100 Air conditioner
[0209] 11 Compressor
[0210] 12 External heat exchanger
[0211] 13 Outdoor fan
[0212] 14 Expansion valve
[0213] 15 Interior heat exchanger
[0214] 15th Front interior heat exchanger
[0215] 15b Rear indoor heat exchanger
[0216] 16 Interior fan
[0217] 17 Four-way valve
[0218] 18 Condensate receiving tray
[0219] 22 Horizontal ventilation grille
[0220] 23 Vertical ventilation grille
[0221] 24, 24A Fan Cleaner
[0222] 24a, 24d Axis
[0223] 24b, 24e Brush
[0224] 24f Support
[0225] 29 Dust receptacle
[0226] 30 Controller
[0227] K Point of contact
[0228] Q Refrigeration circuit
[0229] r Rebaje

权利要求:
Claims (19)
[1]
1. An air conditioner comprising:
an indoor heat exchanger;
an indoor fan;
a condensation receiving tray that is placed below the indoor heat exchanger; Y
a fan that is placed between the indoor heat exchanger and the indoor fan to clean the indoor fan,
wherein at least one of the indoor heat exchanger and the condensation receiving tray is located below the fan cleaner.
[2]
2. An air conditioner comprising:
an indoor heat exchanger;
an indoor fan;
a dust receptacle that is placed below the indoor heat exchanger; and a fan that is arranged between the indoor heat exchanger and the indoor fan to clean the indoor fan,
wherein at least one of the inner heat exchanger and the dust receptacle is located below the fan cleaner.
[3]
3. The air conditioner according to claim 1, wherein
at least one of the indoor heat exchanger and the condensation receiving tray is located below a point of contact in which the fan cleaner is in contact with the indoor fan.
[4]
4. The air conditioner according to claim 2, wherein
at least one of the indoor heat exchanger and the dust receptacle is located below a contact point in which the fan cleaner is in contact with the indoor fan.
[5]
The air conditioner according to claim 1 or 2, further comprising: a controller which controls that the fan cleaner comes into contact with the indoor fan, and controls the indoor fan to rotate it at a rotational speed default
[6]
6. The air conditioner according to claim 5, wherein
the speed of rotation is 300 min-1 or more and less than 1700 min-1.
[7]
7. The air conditioner according to claim 5, wherein
the speed of rotation is 100 min-1 or more and less than 300 min-1.
[8]
8. The air conditioner according to claim 5, wherein
the controller controls that the fan cleaner contacts the indoor fan, and controls the indoor fan to rotate it in a direction opposite to that which it has during the normal operation of the air conditioner.
[9]
9. The air conditioner according to claim 5, wherein
the controller controls that the fan cleaner contacts the indoor fan, and controls the indoor fan to rotate it in the same direction as it has during normal operation of the air conditioner.
[10]
10. The air conditioner according to claim 5, wherein
the controller controls that the indoor heat exchanger functions as an evaporator, after the fan cleaner has cleaned the indoor fan, to cause the condensed water to adhere to the indoor heat exchanger.
[11]
The air conditioner according to claim 10, further comprising: a vertical vent grid that regulates a vertical air flow blown into a room as the indoor fan is rotated,
in which the controller controls the vertical vent to close or to point in a direction higher than the horizontal direction, while controlling the indoor heat exchanger to function as an evaporator to cause the condensed water to adhere to the heat exchanger inside.
[12]
12. The air conditioner according to claim 10, wherein
the controller controls the pressure of the refrigerant flowing to the indoor heat exchanger for regulation so that the evaporating temperature of the refrigerant is lower than it has during the normal operation of the air conditioner, while controlling the indoor heat exchanger for serve as an evaporator to make the condensed water adhere to the indoor heat exchanger.
[13]
13. The air conditioner according to claim 10, wherein
in the indoor heat exchanger, an area located below the fan cleaner is not an area downstream of the coolant flow through the indoor heat exchanger.
[14]
14. The air conditioner according to claim 10, wherein
the indoor heat exchanger includes an indoor heat exchanger that is disposed on a front side of the indoor fan,
wherein in the indoor heat exchanger, an area located on the downstream side of the air flow during normal operation of the air conditioner, whose height is greater than that of the fan, is not the downstream area of the refrigerant flow Flowing through the interior heat exchanger.
[15]
15. The air conditioner according to claim 1 or 2, wherein
the indoor heat exchanger includes an indoor heat exchanger that is disposed on a front side of the indoor fan,
wherein the fan cleaner is disposed in a recess of the front inner heat exchanger having a dog leg shape in a longitudinal cross-sectional view.
[16]
16. The air conditioner according to claim 1 or 2, wherein
the fan cleaner includes an axis which is a bar-like member parallel to an axial direction of the inner fan, and a brush on the shaft,
wherein the brush is oriented in the lateral direction during normal operation of the air conditioner.
[17]
17. The air conditioner according to claim 1 or 2, wherein
the fan cleaner includes an axis which is a bar-shaped member parallel to an axial direction of the inner fan, and a brush on the shaft,
wherein the brush is oriented parallel to an air flow direction, during normal operation of the air conditioner.
[18]
18. The air conditioner according to claim 1 or 2, wherein
the inner fan is coated with a hydrophilic coating agent.
[19]
19. The air conditioner according to claim 1 or 2, wherein
the length of the fan cleaner in a direction parallel to an axial direction of the indoor fan is shorter than the axial length of the indoor fan itself, and the fan cleaner moves in the axial direction of the indoor fan, while cleaning the indoor fan .

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同族专利:

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法律状态:
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优先权:

申请号 | 申请日 | 专利标题

JP2017238202|2017-12-13|

PCT/JP2018/001436|WO2019116590A1|2017-12-13|2018-01-18|Air conditioner|

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