• 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:
    A screw compressor comprising a pair of male and female screw rotors, and an air-cooled heat exchanger, wherein the air-cooled heat exchanger is disposed above an engine for driving the compressor body; wherein, with respect to a cooling stream for the air-cooled heat exchanger, the air-cooled heat exchanger is inclined to the upstream side; wherein the uppermost part of a suction port of the unit for the cooling streams of the air-cooled heat exchanger is positioned below the uppermost part of the air-cooled heat exchanger air positioned at the highest part, in which the lowest part of the unit's suction port for the cooling stream of the air-cooled heat exchanger is positioned below the highest part bottom of the air-cooled heat exchanger positioned at the lowest part; and wherein the cooling stream for the air-cooled heat exchanger is discharged from a ceiling portion of the compressor unit. With ...
    公开号:BE1018846A3
    申请号:E2009/0463
    申请日:2009-07-30
    公开日:2011-10-04
    发明作者:Hideki Fujimoto；Hitoshi Nishimura；Yusuke Nagai
    申请人:Hitachi Ind Equipment Sys；
    IPC主号:
    专利说明:

    COMPRESSOR WITH MTTS ---------
    Field of invention
    The present invention relates to a screw compressor. More particularly, it relates to a screw compressor capable of reducing the noise caused by the operation of the compressor.
    Description of the Related Art
    A screw compressor without oil, or without oil injection, is known, compressing the air using its pair of male and female screw rotors capable of turning into a non-contact, oil-free state provided. The oil-free screw compressor has a compressor body for compressing the air. The temperature of the compressed air discharged from the compressor body is very high. Therefore, in most cases, a cooler (heat exchanger) to cool the compressed air is installed. The compressed air discharged from the compressor body passes through connecting pipes inside the cooler and the compressor unit to be exhausted outside the compressor unit. As traditional technologies of this type, the "Patent 1" document describes a structure of a single-stage compressor and the "Patent 2" describes a two-stage oil-free screw compressor comprising two compressor bodies.
    ("Patent 1" document) Japanese Patent Laid-open 01-116297 ("Patent 2" Document) Japanese Patent Laid-Opened 11-141488 Summary of Invention
    For example, in an oil-less screw compressor, the lubricating oil is not injected for sealing between a pair of male and female rotors of its compressor body. Therefore, leakage through a space between the rotors and leakage through a gap formed in the groove of the teeth, or in the periphery of a compressor chamber greatly affects the efficiency of the compressor of this type. Generally, in the oil-free screw compressor, in order to achieve a certain level of efficiency by overcoming this leak, the rotors are driven at a high speed of about 10,000 to 20,000 rpm.
    In addition, the compressed air of the compressor body is discharged intermittently through an exhaust port. The evacuated flow rate varies according to a meshing cycle performed by multiplying the number of rotor teeth by the rotations per minute of the rotor, causing the pulsation of the pressure at the discharge orifice. The pressure pulsation during evacuation is transmitted from the same compressor body or pipes connected to the compressor body to a cooler (heat exchanger) for cooling the compressor air, generating noise due to vibration. In particular, in comparison with an oil-injected screw compressor whose rotors rotate at 3000 to 4000 revolutions per minute, the rotors of the oil-less screw compressor rotate at a very high speed, producing a high frequency noise of several thousands of hertz.
    According to the document "patent 1", since a cooler is disposed near a supply port of a cooling stream of the housing, the noise due to the vibrations of the heat exchanger is likely to leak directly to the outside of the housing.
    In addition, according to the document "patent 2", suction ports of a conduit are arranged in an opposite manner next to the upstream of the heat exchanger (cooler). Consequently, the noise due to the vibrations of the heat exchanger can propagate along the duct to leak outside the casing.
    The present invention is realized in view of the aforementioned problems, and it relates in particular to a screw compressor having an air-cooled heat exchanger, being a component having the largest sound emission area in the compressor unit. The object of the present invention is to provide a compact screw compressor emitting less noise and using a small installation area without disturbing the cooling capacity of a heat exchanger by disposing the air-cooled heat exchanger in a central part in the unit.
    In order to obtain the above object, the present invention relates to an oil-less screw compressor comprising: a compressor body having a pair of male and female screw rotors; an air-cooled heat exchanger for cooling a lubricating oil in the compressor; a heat exchanger.
    air-cooled heat for cooling compressed air discharged from the compressor; and a housing for receiving the foregoing components, wherein the oil-less screw compressor further comprises: a motor disposed in the lower portion of the housing for driving the compressor; and a duct sucking air from an area below the casing and discharging it from a ceiling portion and having the central portion extending above the engine; wherein the above air-cooled heat exchanger is inclined in a central portion of the conduit; and wherein a suction duct for reducing the noise of the air-cooled heat exchanger is disposed closer to a suction side than to the central portion of the duct.
    In the screw compressor described above, a cooling fan is disposed in the conduit on the upstream side of the air-cooled heat exchanger.
    In the screw compressor described above, a cooling fan is disposed in the conduit on the downstream side of an air-cooled heat exchanger.
    In any of the screw compressors described above, the suction duct is formed as a baffle structure in which an upper portion of a duct suction port may be located below the most The upper part of the air-cooled heat exchanger and a lower portion of the duct suction port may be located below the lower part of the air-cooled heat exchanger.
    In addition, in any one of the screw compressors described above, the suction duct is formed as a baffle structure in which a channel has two or more angles.
    In addition, in any of the screw compressors described above, the suction duct is formed as a baffle structure having two or more channels.
    In addition, in the screw compressor described above, the two or more channels are formed such that they fuse immediately before the air-cooled heat exchanger.
    In addition, in any of the screw compressors described above, a cooling channel cooling the motor is disposed in a lower portion of the suction duct.
    In addition, in any of the screw compressors described above, an exhaust duct is provided for extending from a central portion of the above duct to a ceiling portion of the casing, the duct of discharge having two or more angles with respect to a discharge direction or being of curved shape.
    In addition, in the screw compressor described above, a suction port is disposed in the waste heat exhaust duct to cool the engine cooling fan and to ventilate the heat lost in the casing.
    In addition, in the screw compressor described above, the compressor body is an oil-free screw compressor having a pair of male and female screw rotors rotatable in an oil-free contactless state provided.
    According to the present invention, while reducing the noise of the screw compressor, the installation area can be reduced and the compressor can be compacted.
    Brief description of the drawings
    Figure 1 illustrates a structure of an oil-less screw compressor and a flow of compressed air and lubricating oil;
    FIGS. 2A to 2D illustrate a unitary structure of the oil-less screw compressor, in which FIG. 2A is a view from above, FIG. 2B is a side view of the left, FIG. 2C is a front sectional view, and FIG. Figure 2D is a side view of the line; FIGS. 3A-3B illustrate the spatial relationship between an air-cooled heat exchanger and an oil-less screw compressor suction port, in which FIG. 3A is a front sectional view and FIG. 3B is a side view of FIG. the right.
    Detailed Description of the Preferred Embodiments
    The present invention generally relates to a screw compressor having an air-cooled heat exchanger and is not limited to an oil-less screw compressor. However, in comparison with an oil-injected screw compressor, it is preferable to use it in the oil-free type. Therefore, below, an embodiment of the present invention discloses an oil-less screw compressor having a compressor body including a pair of male and female screw rotors rotatable in an oil-free contactless state provided.
    Figure 1 illustrates a complete structure of the oil-free screw compressor and a flow of compressed air and lubricating oil. In Figure 1, the oil-free screw compressor received in the. The compressor unit 1 casing is a two stage compressor and includes a low pressure stage compressor body 2a and a high pressure stage compressor body 2b. A throttle valve 6 is disposed on an upstream side of a suction gas passage of the low pressure stage compressor body 2a. In addition, the compressor body receives, in its compression chamber, a male rotor 3 and a female rotor 4, which are a pair of screw rotors. The male and female rotors 3 and 4 are rotatably disposed in a non-contact, oil-free state provided. A groove is formed in its outer periphery as a gas passage whose capacity varies.
    The two compressor bodies 2a and 2b are rotated through a drive gear 7 by a motor 8 to drive the compressor body. The gas to be used for compression is admitted from outside, through a suction filter 5 at ordinary temperature, and is supplied to the low-pressure stage compressor body 2a. The compressed air here passes the air-cooled low pressure step heat exchanger 9 through a pipe to be cooled, and is then supplied to the high-pressure stage compressor body 2b through a pipe. The air also compressed by the high-pressure stage compressor body 2b passes through a pre-stage heat exchanger 10 (pre-cooler) for a high-pressure air-cooled heat exchanger 11 to be installed at the same time. If required, on an upstream side of the high-pressure air-cooled heat exchanger 11. Next, the air is supplied to the high-pressure air-cooled heat exchanger 11 to be cooled and vented to the high-pressure air-cooled heat exchanger 11. the outside of the compressor unit.
    Also, the lubricating oil filled in a gear case 12 is cooled to a suitable temperature by an air-cooled heat exchanger 13 for the compressor lubricating oil. In addition, it is supplied to a compressor bearing comprising the interior space of the compressor body and a control gear 7 for cooling and lubricating the rotation, and then collected in the gear case 12.
    In the screw compressor having such a structure, when the capacity of the compression chamber formed by the pair of male and female rotors and the housing decreases, the air is compressed. At the end of the compression process, the compression chamber is brought into communication with an evacuation chamber and the air is evacuated to the side of the evacuation chamber. However, since the amount of the discharge rate varies according to a cycle of engagement of the rotors, a pressure pulse is generated. Depending on the pulsation, a force is applied to the compressor body itself and generates crankcase and noise vibrations. Similarly, the pressure pulse is transmitted to the downstream side by compressed air. In the oil-free screw compressor having an air-cooled heat exchanger, in the path of compressed air passage, the air-cooled heat exchanger has the largest sound emission area, and this is the one of the most important sources of noise in the compressor unit.
    In order to solve the above problem, an explanation is given of a unitary structure of the oil-less screw compressor comprising an air-cooled heat exchanger which has a real spatial relationship of the present embodiment.
    In FIG. 2C, the motor 8 for driving the compressor is disposed in the lower part of the casing of the unit 1. Similarly, a duct is disposed in which the air is admitted through a suction orifice 15 underneath. of a wall of the casing 1 and is discharged from a ceiling portion of the casing 1, and its central portion extends above the motor 8. The duct comprises a suction duct 16, a central duct 20 (central portion duct), and an exhaust duct 17 connected and in communication with each other. The central duct 20 is disposed above the engine 8 or above the height of the engine 8. In the central duct 20, the air-cooled heat exchangers 9, 10, and 11 are inclined. In addition, in the suction duct 16 connected to the suction port 15, a structure is arranged to suppress the noise caused by the air-cooled heat exchanger. In addition, an exhaust fan 14 is disposed in the exhaust duct 17. The exhaust fan 14 brings a cooling stream through the suction port 15, allows it to pass through the exchanger heat to be evacuated outside the casing 1 of the ceiling. Similarly, the air-cooled heat exchanger may comprise a heat exchanger 13.
    As is illustrated in FIG. 2C, the heat exchangers 9, 10, 11, which are sources of noise, are arranged on the central part of the casing of the unit 1. Consequently, the heat exchangers are spaced apart. the suction port 15 of the conduit and the ceiling exhaust port. Thus, it becomes possible to prevent the noise caused by the heat exchangers from coming out of the housing through the suction port 15 and the exhaust port.
    To save space, the air-cooled heat exchangers may be stacked over an upper portion of the motor 8 to drive the compressor body or the uppermost part of the engine. Therefore, the crankcase installation area of the compressor unit can be reduced. At the same time, by tilting each air-cooled heat exchanger on the upstream side with respect to the cooling stream, the height of the compressor unit casing can be reduced.
    Now, an exemplary structure of the suction duct 16 for suppressing the noise in the air-cooled heat exchanger, the spatial relationship between the air-cooled heat exchanger and the duct suction port is explained. . That is, as illustrated in FIG. 3A, the suction duct 16 may have a deflector structure (baffle door structure) with two or more angles, so that the portion the highest 15a of the suction port 15 of the conduit is located below the uppermost portion 16a of the heat exchanger and the lowest part 15b of the suction port 15 of the conduit is located below the lowest part 16b of the heat exchanger. The baffle structure is formed such that it can be inclined downwardly toward the side of the suction port 15. In addition, two or more substantially parallel channels may be arranged as channels for the conduit. suction 16 so that the incoming cooling streams can fuse immediately before the heat exchanger. In addition, it may be a sound absorption structure in which a sound absorption material is fixed inside the suction duct 16.
    Thus, the suction duct 16 has the deflector structure facing down towards the side of the suction port 15 with two or more angles. As a result, the sound emitted from the air-cooled heat exchanger is attenuated by the inner wall of the conduit 16. In addition, it is prevented from passing directly through the suction port 15 and is prevented from escaping. through the suction port 15. Similarly, when the noise that has struck the inner wall of the duct 16 passes through the suction port 15, it escapes through the suction port downwards because downward orientation of the baffle structure. Therefore, the noise reduction effect by sound insulation is achieved to the benefit of the workers on the site. In addition, if a sound-absorbing material is attached internally, of the suction duct 16, a silence effect can be improved. In addition, the two or more channels are arranged for the suction duct 16. As a result, the surface of the inner wall of the suction duct 16 is increased, making it possible to increase the possibility of collision with the noise and of increase the sound absorption area (if the sound absorption material is fixed). Therefore, the noise caused by the sound leakage of the suction port 15 can be reduced.
    Similarly, the air-cooled heat exchanger is isolated in the duct side of the other components in the casing 1 and cooled by the cooling current flowing therefrom. So the lost heat generated in the compressor body, motor, etc. inside the housing 1 does not enter the cooling stream in the duct, preventing the temperature from rising.
    Now, with respect to the cooling current for the air-cooled heat exchangers, a structure on the downstream side of the air-cooled heat exchangers is explained. Firstly, because of the compression ratio of the low-pressure stage compressor body 2a or the high-pressure stage compressor body 2b, when the temperature of the discharged compressed air exceeds the heat resistance temperature of the air-cooled heat exchangers 9, 11 or the temperature likely to shorten their service life, for protection against thermal fatigue, an air-cooled pre-heat pretreatment heat exchanger (precooler) must be installed for the reduced-pressure air-cooled heat exchanger 9 or the high-pressure air-cooled heat exchanger 11, or both heat exchangers. In these cases, with respect to the cooling current for the air-cooled heat exchangers, the air-cooled prior stage heat exchangers are installed downstream of the air-cooled heat exchangers.
    In Fig. 1, the air-cooled preconditioning heat exchanger 10 is installed on the side of the air-cooled high pressure heat exchanger 11. In Fig. 2C, the stage heat exchanger The air-cooled pre-heater 10 is installed downstream of the air-cooled heat exchangers 9 and 10. This is because the temperature of the compressed air supplied to the pre-cooled air-cooled stage heat exchanger 10 is greater than that of the air-cooled heat exchangers. air-cooled heat exchangers 9 and 10 for the compressed air and it is sufficiently possible to achieve heat exchange even using the cooling current (lost current) having passed through the heat exchangers 9 and 11.
    The air-cooled pre-stage heat exchanger described above is installed as needed. Then, the downstream side of the air-cooled heat exchanger and the ceiling portion of the compressor unit 1 casing are connected through the exhaust duct 17, and a cooling fan 14 is installed at the inside the exhaust duct 17 (FIG. 2C). The exhaust duct 17 above extends from the central duct 20 to the ceiling portion of the casing, having two or more angles with respect to the evacuation direction or having a curved shape. By mounting the exhaust duct 17, the rise in temperature inside the compressor unit 1 casing due to the lost heat of the air-cooled heat exchanger is prevented. Similarly, it is simply necessary to install the cooling fan having a sufficiently high static pressure to overcome the loss of pressure of the cooling stream caused by the suction duct 16, the air-cooled heat exchanger, and the exhaust duct 17. At the same time, it becomes possible to make the cooling fan compact and to facilitate the calculation of CAE for the design of the duct. In addition, the cooling fan may be disposed upstream of the air-cooled heat exchanger of the central duct 20 (illustrated by the numeral 14 'in Fig. 2C and Fig. 3A).
    According to the present embodiment, the area of installation of the housing of the unit of the compressor 1 can be reduced. At the same time, the sound emitted from the air-cooled heat exchanger can be reduced. Likewise, because of the structure of the conduit, a flow not disturbing the flow of the cooling stream of the air-cooled heat exchanger can be formed ((1) in Fig. 2C). In addition, when the compressor unit 1 casing is installed in a room, the cooling stream for the air-cooled heat exchanger is admitted from a lower portion having a lower ambient temperature, which is advantageous for the cooling of the air-cooled heat exchanger. At the same time, the suction port for the cooling stream of the air-cooled heat exchanger can also be disposed below the position of a worker's ears on the site. Thus, the structure of the present embodiment is such that in addition to reducing noise in the compressor unit 1 casing, it is preferable for human hearing since the suction port is disposed in the lower part.
    Next, with reference to Fig. 1 and Fig. 2C, a method of evacuating waste heat generated in the housing of the compressor unit 1 is explained. The structure is such that a cooling channel 19 is disposed in a lower space of the suction duct 16 or the same lower space of the suction duct 16 is used as a cooling duct. In addition, a suction port 18 is disposed in the exhaust duct 17 for the lost heat of the engine and the interior of the housing of the unit. When the cooling fan 14 is driven, heat lost inside the casing 1 is admitted through the suction port 18 for lost heat. Therefore, after passing through the cooling channel 19 and cooling the motor 8, the cooling current for the drive motor 8 of the compressor body carries lost heat from the compressor body, etc. and is evacuated outside the ceiling of the compressor unit housing through the exhaust duct.
    In addition, the flow for cooling the cooling fan motor can be formed by aligning the positions of the motor and the suction port 18 for the lost heat of the unit with the position of the cooling fan motor 14 ( (2) in Fig. 2C). The temperature of the heat lost in the compressor unit 1 housing including the heat lost in the engine 8 to drive the compressor is low compared to the heat loss temperature of the air-cooled heat exchanger. Therefore, it can be used as a cooling current for the cooling fan motor.
    As described above, space saving is achieved by efficiently utilizing space in the compressor unit housing, and it becomes possible to provide a low noise, compact, oil-free screw compressor using a small installation area.
    权利要求:
    Claims (20)
    [1]
    A screw compressor comprising a compressor body having a pair of male and female screw rotors; an air-cooled heat exchanger for cooling a lubricating oil of the compressor; an air-cooled heat exchanger for cooling the compressed air discharged from the compressor; and a housing for receiving the components described above, wherein the screw compressor further comprises: a motor for driving the compressor disposed in the lower portion of the housing; and a duct sucking air from a lower portion of the casing and discharging it from a ceiling portion and having a central portion extending over an upper portion of the engine; wherein the air-cooled heat exchanger is disposed on the central portion of the duct in an inclined manner; and wherein a suction duct for suppressing the noise of the air-cooled heat exchanger is disposed closer to a suction side than to the central portion of the duct.
    [2]
    The screw compressor according to claim 1, wherein a cooling fan is disposed in the conduit on an upstream side of the air-cooled heat exchanger.
    [3]
    The screw compressor according to claim 1, wherein a cooling fan is disposed in the conduit on a downstream side of an air-cooled heat exchanger.
    [4]
    The screw compressor according to claim 1, wherein said suction duct is formed as a deflector structure in which an upper portion of a duct suction port is positioned below the uppermost portion of the duct. heat exchanger cooled by air; and wherein a lower portion of the duct suction port is positioned below the lower portion of the air-cooled heat exchanger.
    [5]
    The screw compressor according to claim 1, wherein the suction duct is formed as a deflector structure in which a channel has two or more angles.
    [6]
    The screw compressor according to claim 1, wherein said suction duct is formed as a baffle structure having two or more channels.
    [7]
    The screw compressor according to claim 6, wherein the two or more channels fuse immediately before the air-cooled heat exchanger.
    [8]
    The screw compressor according to claim 1, wherein a cooling channel for cooling said motor is disposed in a lower portion of the suction duct.
    [9]
    A screw compressor according to claim 1, including a discharge duct extending from the central portion of the duct to the ceiling portion of the casing which has two or more angles with respect to a discharge direction or which is curved shape.
    [10]
    10. Screw compressor according to claim 9, comprising in the exhaust duct a suction port for lost heat to cool the cooling fan and for ventilation of heat lost in the housing.
    [11]
    The screw compressor according to claim 1, wherein said compressor body comprises a pair of male and female screw rotors rotatable in a non-contact, oil-free state provided.
    [12]
    The screw compressor according to claim 2, wherein said compressor body comprises a pair of male and female screw rotors rotatable in an oil-free contactless state provided.
    [13]
    The screw compressor according to claim 3, wherein said compressor body comprises a pair of male and female screw rotors rotatable in an oil free contactless state provided.
    [14]
    The screw compressor according to claim 4, wherein said compressor body comprises a pair of male and female screw rotors rotatable in an oil-free contactless state provided.
    [15]
    The screw compressor according to claim 5, wherein said compressor body comprises a pair of male and female screw rotors rotatable in a non-contact, oil-free state provided.
    [16]
    The screw compressor according to claim 6, wherein said compressor body comprises a pair of male and female screw rotors rotatable in an oil-free contactless state provided.
    [17]
    The screw compressor according to claim 7, wherein said compressor body comprises a pair of male and female screw rotors rotatable in an oil-free contactless state provided.
    [18]
    The screw compressor according to claim 8, wherein said compressor body comprises a pair of male and female screw rotors rotatable in an oil-free contactless state provided.
    [19]
    The screw compressor according to claim 9, wherein said compressor body comprises a pair of male and female screw rotors rotatable in an oil-free contactless state provided.
    [20]
    The screw compressor according to claim 10, wherein said compressor body comprises a pair of male and female screw rotors rotatable in an oil-free contactless state provided.
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    BE1011636A3|1997-12-23|1999-11-09|Atlas Copco Airpower Nv|Compressor with built-in fan|
    EP1229243A2|2001-02-05|2002-08-07|Ingersoll-Rand Company|Enclosure for an air compressor|
    US20020106288A1|2001-02-05|2002-08-08|Ingersoll-Rand Company|Compressor system|
    EP1249603A2|2001-04-10|2002-10-16|Boge Kompressoren|Compressor system and control method therefor|CN109312731A|2016-06-16|2019-02-05|株式会社神户制钢所|Enclosure compressor|CA1279856C|1985-10-09|1991-02-05|Akira Suzuki|Oilless rotary type compressor system|
    JPH0681960B2|1987-10-28|1994-10-19|株式会社日立製作所|Air-cooled oil-free rotary compressor|
    JPH01312357A|1988-06-10|1989-12-18|Toshiba Corp|Refrigerator|
    JP3457165B2|1997-11-07|2003-10-14|株式会社日立産機システム|Air-cooled two-stage oil-free screw compressor|
    JP3590860B2|1998-04-07|2004-11-17|株式会社日立産機システム|air compressor|
    JP2002155879A|2000-11-22|2002-05-31|Hitachi Ltd|Oil-free screw compressor|
    JP3898977B2|2002-05-16|2007-03-28|新キャタピラー三菱株式会社|Engine equipment|
    JP4271046B2|2004-01-26|2009-06-03|株式会社日立産機システム|Compressor unit|
    JP4539133B2|2004-03-01|2010-09-08|コベルコ建機株式会社|Exhaust structure of construction machinery|
    JP4673136B2|2005-06-09|2011-04-20|株式会社日立産機システム|Screw compressor|
    JP4741992B2|2006-07-19|2011-08-10|株式会社日立産機システム|Oil-free screw compressor|
    JP5110882B2|2007-01-05|2012-12-26|株式会社日立産機システム|Oil-free screw compressor|US9856866B2|2011-01-28|2018-01-02|Wabtec Holding Corp.|Oil-free air compressor for rail vehicles|
    JP5774455B2|2011-11-30|2015-09-09|株式会社日立産機システム|oil-free compressor|
    JP6325336B2|2014-05-15|2018-05-16|ナブテスコ株式会社|Air compressor unit for vehicles|
    DE102015104914B4|2015-03-30|2021-09-23|Gardner Denver Deutschland Gmbh|Compressor system for generating compressed air and a method for operating a compressed air generating compressor system|
    JP6051271B2|2015-07-01|2016-12-27|株式会社日立産機システム|Oil-free screw compressor|
    JP6571422B2|2015-07-03|2019-09-04|株式会社神戸製鋼所|Packaged air-cooled screw compressor|
    JP6472373B2|2015-12-22|2019-02-20|株式会社神戸製鋼所|Screw compressor|
    JP6675196B2|2015-12-28|2020-04-01|株式会社神戸製鋼所|Package type compressor|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP2008304641|2008-11-28|
    JP2008304641A|JP5452908B2|2008-11-28|2008-11-28|Oil-free screw compressor|
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