JP2015042847A - Screw compressor - Google Patents
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Abstract
Description
本発明は、空調機や冷凍機などの冷凍装置に用いられるスクリュー圧縮機に関する。 The present invention relates to a screw compressor used in a refrigeration apparatus such as an air conditioner or a refrigerator.
従来のスクリュー圧縮機として、空調機や冷凍機などの冷凍装置にスクリュー圧縮機を用いる場合に、冷凍サイクル内を循環する液冷媒をバイパスし、液冷媒と圧縮機内を循環する油とを熱交換し、油を冷却するものがある（例えば、特許文献１参照）。 When a screw compressor is used as a conventional screw compressor in a refrigerating apparatus such as an air conditioner or a refrigerator, the liquid refrigerant circulating in the refrigeration cycle is bypassed, and heat exchange is performed between the liquid refrigerant and oil circulating in the compressor. However, there are some which cool oil (for example, refer to patent documents 1).
特許文献１に記載の冷凍装置は、スクリュー圧縮機、油分離器、凝縮器、減圧装置及び蒸発器が冷媒配管を介して接続された冷媒の循環サイクルと、油分離器から油冷却器を経て、圧縮機内の軸受部、スクリューロータに至る油供給流路と、減圧装置出口の冷媒配管から液冷媒を一部バイパスし、膨張弁、冷却菅を経てスクリューロータに至る冷媒の分岐流路を備える。油冷却器にて、油分離器からの高温の油と分岐流路からバイパスした冷たい冷媒とを熱交換させて高温の油を冷却し、冷却された油をスクリューロータと軸受部に導く。 The refrigeration apparatus described in Patent Document 1 includes a refrigerant circulation cycle in which a screw compressor, an oil separator, a condenser, a decompression device, and an evaporator are connected via a refrigerant pipe, and an oil cooler from the oil separator. , An oil supply passage leading to the bearing portion in the compressor, the screw rotor, and a refrigerant branch passage that bypasses the liquid refrigerant partially from the refrigerant pipe at the outlet of the decompression device and reaches the screw rotor via the expansion valve and the cooling rod . In the oil cooler, the high-temperature oil from the oil separator and the cold refrigerant bypassed from the branch flow path are heat-exchanged to cool the high-temperature oil, and the cooled oil is guided to the screw rotor and the bearing portion.
特許文献１のスクリュー圧縮機では、油分離器からの高温の油と減圧装置出口の冷媒配管からバイパスした液冷媒とを別途設けた油冷却器に導き熱交換させる。しかしながら、高温の油を冷却するために液冷媒をバイパスするように構成すると、液冷媒を減圧する膨張弁、冷却管を収納する熱交換器が必要となりサイクルの構成が複雑になる。更に、低温となる冷媒と熱交換させるため、油の過冷却による性能低下の可能性もある。 In the screw compressor of Patent Document 1, high-temperature oil from the oil separator and liquid refrigerant bypassed from the refrigerant pipe at the outlet of the decompression device are led to an oil cooler provided separately for heat exchange. However, when the liquid refrigerant is bypassed in order to cool the high-temperature oil, an expansion valve that depressurizes the liquid refrigerant and a heat exchanger that houses the cooling pipe are required, and the cycle configuration becomes complicated. Furthermore, since heat exchange is performed with a refrigerant having a low temperature, there is a possibility of performance degradation due to oil supercooling.
本発明は、簡易な構造で軸受や圧縮作動室に供給される油を冷却し、高効率、高信頼性のスクリュー圧縮機を提供すことを課題とする。 An object of the present invention is to provide a highly efficient and highly reliable screw compressor by cooling oil supplied to a bearing and a compression working chamber with a simple structure.
本発明のスクリュー圧縮機は、冷媒を圧縮するスクリューロータと、スクリューロータを駆動するモータと、スクリューロータを支持する軸受と、スクリューロータ、モータ、及び、軸受を収納するケーシングと、スクリューロータから吐出した冷媒を冷媒ガスと油に分離する油分離器と、ケーシングに一体で形成された熱交換器と、を備え、油分離器で分離された油は熱交換器内の油流路を経由して軸受に供給される。 The screw compressor of the present invention includes a screw rotor that compresses a refrigerant, a motor that drives the screw rotor, a bearing that supports the screw rotor, a screw rotor, a motor, a casing that houses the bearing, and a discharge from the screw rotor. An oil separator that separates the refrigerant into refrigerant gas and oil, and a heat exchanger that is formed integrally with the casing, and the oil separated by the oil separator passes through an oil passage in the heat exchanger. Supplied to the bearing.
本発明によれば、簡易な構造で軸受や圧縮作動室に供給される油を冷却し、高効率、高信頼性のスクリュー圧縮機を提供すことができる。 ADVANTAGE OF THE INVENTION According to this invention, the oil supplied to a bearing or a compression working chamber can be cooled with a simple structure, and a highly efficient and highly reliable screw compressor can be provided.
本実施例のスクリュー圧縮機は、冷媒を圧縮するスクリューロータと、スクリューロータを駆動するモータと、スクリューロータを支持する軸受と、スクリューロータ、モータ、及び、軸受を収納するケーシングと、スクリューロータから吐出した冷媒を冷媒ガスと油に分離する油分離器と、ケーシングに一体で形成された熱交換器と、を備え、油分離器で分離された油は熱交換器内の油流路を経由して軸受に供給される。油分離器で分離された油はケーシングに形成された熱交換器内の油流路を経由して軸受に供給されるので、簡易な構造で軸受や圧縮作動室に供給される油を冷却でき、高効率、高信頼性のスクリュー圧縮機を提供すことができる。 The screw compressor of this embodiment includes a screw rotor that compresses a refrigerant, a motor that drives the screw rotor, a bearing that supports the screw rotor, a screw rotor, a motor, a casing that houses the bearing, and a screw rotor. An oil separator that separates the discharged refrigerant into refrigerant gas and oil, and a heat exchanger that is formed integrally with the casing, and the oil separated by the oil separator passes through an oil passage in the heat exchanger And supplied to the bearing. Since the oil separated by the oil separator is supplied to the bearing via the oil flow path in the heat exchanger formed in the casing, the oil supplied to the bearing and the compression working chamber can be cooled with a simple structure. A highly efficient and reliable screw compressor can be provided.
以下、本発明の一実施形態を、図面を参照して説明する。図１はスクリュー圧縮機の外観を表す図である。図２は図１中の縦断面図である。図３は図１中の横断面図である。図４は図３中のIII-III矢視断面図である。図５は油の流れを表す油系統図である。図６は本実施例の変形例であり、図３に相当する図である。図７は図５中のIV-IV矢視断面図である。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing the appearance of a screw compressor. FIG. 2 is a longitudinal sectional view in FIG. FIG. 3 is a cross-sectional view in FIG. 4 is a cross-sectional view taken along the line III-III in FIG. FIG. 5 is an oil system diagram showing the flow of oil. FIG. 6 shows a modification of the present embodiment and corresponds to FIG. 7 is a cross-sectional view taken along the line IV-IV in FIG.
これら図１〜図５において、スクリュー圧縮機は、圧縮機本体７０と、圧縮機本体７０を駆動するモータ（電動機）７，８と、モータ７，８を収納するモータケーシング１とを備える。モータケーシング１は、モータ７，８の外側に冷媒流路１１を形成しており、吸込口５からストレーナ３０を経て吸込室（低圧室）１０を介して冷媒流路１１内にガスが流入する。 1 to 5, the screw compressor includes a compressor main body 70, motors (electric motors) 7 and 8 that drive the compressor main body 70, and a motor casing 1 that houses the motors 7 and 8. The motor casing 1 has a refrigerant flow path 11 formed outside the motors 7 and 8, and gas flows into the refrigerant flow path 11 from the suction port 5 through the strainer 30 and the suction chamber (low pressure chamber) 10. .
圧縮機本体７０で圧縮された冷媒ガスは、吐出ポート１４を介して吐出ケーシング３に形成された吐出室（高圧室）１３内に流出する。吐出室１３は、圧縮機本体７０に一体で形成された油分離器４に接続される。吐出室１３から油分離機４に流入した冷媒ガスは、圧縮機本体７０で圧縮された冷媒ガスと油とを分離する。分離されたガスは圧縮機本体７０の吐出口６から外部（例えば冷凍サイクルを構成する凝縮器）へ供給される。一方、分離された油は、油分離器下部に設けられた油溜め１０に溜められ、メインケーシング２に配設された軸受２０、２１及び吐出ケーシング３に配設された軸受２２、２３、２４、２５へ供給される。メインケーシング２に配設された軸受２０、２１へ供給された油は、軸受２０、２１を潤滑しメインケーシングに形成された吸込ポート１２に排出される。吐出ケーシング３に配設された軸受２２、２３、２４、２５へ供給された油は、雄ロータ９Ａ及び雌ロータ９Ｂで形成される圧縮作動室に排出される。 The refrigerant gas compressed by the compressor main body 70 flows into the discharge chamber (high pressure chamber) 13 formed in the discharge casing 3 through the discharge port 14. The discharge chamber 13 is connected to the oil separator 4 formed integrally with the compressor body 70. The refrigerant gas flowing into the oil separator 4 from the discharge chamber 13 separates the refrigerant gas compressed by the compressor body 70 and the oil. The separated gas is supplied from the discharge port 6 of the compressor body 70 to the outside (for example, a condenser constituting a refrigeration cycle). On the other hand, the separated oil is stored in an oil sump 10 provided at the lower part of the oil separator, and bearings 20 and 21 provided in the main casing 2 and bearings 22, 23 and 24 provided in the discharge casing 3. , 25. The oil supplied to the bearings 20 and 21 disposed in the main casing 2 lubricates the bearings 20 and 21 and is discharged to the suction port 12 formed in the main casing. The oil supplied to the bearings 22, 23, 24, and 25 disposed in the discharge casing 3 is discharged into a compression working chamber formed by the male rotor 9A and the female rotor 9B.
モータ７、８は、雄ロータ９Ａの吸込側軸部に取り付けられた回転子８と、回転子８の外周側に配設された固定子７と、これら回転子８及び固定子７を収納するモータケーシング１とを備える。 The motors 7 and 8 house the rotor 8 attached to the suction side shaft portion of the male rotor 9A, the stator 7 disposed on the outer peripheral side of the rotor 8, and the rotor 8 and the stator 7. A motor casing 1.
圧縮機本体７０は、回転軸が平行で互いに噛み合いながら回転する雄ロータ９Ａ及び雌ロータ９Ｂと、これら雄ロータ９Ａ及び雌ロータ９Ｂの歯部を収納するメインケーシング２と、メインケーシング２のロータ軸方向吐出側（図２中右側）に接続された吐出ケーシング３とを備える。 The compressor main body 70 includes a male rotor 9A and a female rotor 9B that rotate while being parallel to each other with their rotation axes parallel to each other, a main casing 2 that houses the teeth of the male rotor 9A and the female rotor 9B, and a rotor shaft of the main casing 2 And a discharge casing 3 connected to the direction discharge side (right side in FIG. 2).
メインケーシング２のロータ軸方向吸込側（図２中左側）にはモータケーシング１が接続されており、モータケーシング１の内部には、吸込室１０からメインケーシング２への冷媒流路１１が形成される。 A motor casing 1 is connected to the suction side (left side in FIG. 2) of the main casing 2 in the rotor axial direction, and a refrigerant flow path 11 from the suction chamber 10 to the main casing 2 is formed inside the motor casing 1. The
雄ロータ９Ａの吸込側軸部はメインケーシング２に配設されたころ軸受２０で支持され、吐出側軸部は吐出ケーシング３に配設されたころ軸受２２及び玉軸受２４で支持される。同様に、雌ロータ９Ｂの吸込側軸部はメインケーシング２に配設されたころ軸受２１で支持され、吐出側軸部は吐出ケーシング３に配設されたころ軸受２３及び玉軸受２５で支持される。また、雄ロータ９Ａの吸込側軸部はモータ７、８の回転軸と直結する。モータ７、８の駆動によって雄ロータ９Ａが回転し、これに伴い、雌ロータ９Ｂが雄ロータ９Ａと噛み合いながら回転する。 The suction side shaft portion of the male rotor 9 </ b> A is supported by a roller bearing 20 disposed in the main casing 2, and the discharge side shaft portion is supported by a roller bearing 22 and a ball bearing 24 disposed in the discharge casing 3. Similarly, the suction side shaft portion of the female rotor 9B is supported by a roller bearing 21 disposed in the main casing 2, and the discharge side shaft portion is supported by a roller bearing 23 and a ball bearing 25 disposed in the discharge casing 3. The Further, the suction side shaft portion of the male rotor 9 </ b> A is directly connected to the rotation shafts of the motors 7 and 8. The male rotor 9A is rotated by driving the motors 7 and 8, and the female rotor 9B is rotated while meshing with the male rotor 9A.
メインケーシング２は、雄ロータ９Ａ及び雌ロータ９Ｂの歯部を収納する円筒状のボア１５、１６を有する。雄ロータ９Ａ及び雌ロータ９Ｂの歯溝には圧縮作動室が形成される。メインケーシング２には、モータケーシング１の内部と吸気行程の圧縮作動室とを連通する吸込ポート１２が形成される。メインケーシング２には、吐気行程の圧縮作動室に対してロータ径方向外側（図２中上側）に位置する雄ロータ９Ａ側の吐出ポート１４及び雌ロータ９Ｂ側の吐出ポートが形成される。 The main casing 2 has cylindrical bores 15 and 16 that house the teeth of the male rotor 9A and the female rotor 9B. Compression working chambers are formed in the tooth grooves of the male rotor 9A and the female rotor 9B. The main casing 2 is formed with a suction port 12 that communicates the inside of the motor casing 1 with the compression working chamber of the intake stroke. The main casing 2 is formed with a discharge port 14 on the male rotor 9A side and a discharge port on the female rotor 9B side which are located on the outer side in the rotor radial direction (upper side in FIG. 2) with respect to the compression working chamber of the exhaust stroke.
吐出ケーシング３は、メインケーシング２の端面に当接してボア１５、１６の開口を覆う吐出側端面と、吐出側端面に形成された雄ロータ９Ａ側の吐出ポート及び雌ロータ９Ｂ側の吐出ポートと、圧縮作動室からの圧縮ガスが吐出ポート１４を介して吐出される吐出室１３とを有する。 The discharge casing 3 is in contact with the end surface of the main casing 2 and covers the openings of the bores 15 and 16, the discharge port on the male rotor 9A side and the discharge port on the female rotor 9B side formed on the discharge side end surface. And a discharge chamber 13 through which compressed gas from the compression working chamber is discharged through the discharge port 14.
このようなスクリュー圧縮機においては、冷媒ガスが吸込口５から吸込室１０に流入し、モータケーシング１の冷媒流路１１を経由して（回転子８及び固定子７を冷却しつつ）メインケーシング２の吸込ポート１２に流入する。雄ロータ９Ａ及び雌ロータ９Ｂの回転に伴い、圧縮作動室がロータ軸方向に移動しつつ容積が縮小されて、冷媒ガスを圧縮する。圧縮機作動室で圧縮された冷媒ガスは、吐出ポート１４、吐出室１３を介して油分離機４に流入し、油分離機４で油と分離された後、吐出口６から外部へ供給される。 In such a screw compressor, the refrigerant gas flows into the suction chamber 10 from the suction port 5 and passes through the refrigerant flow path 11 of the motor casing 1 (while cooling the rotor 8 and the stator 7). Flows into the second suction port 12. Along with the rotation of the male rotor 9A and the female rotor 9B, the volume of the compression working chamber is reduced while moving in the rotor axial direction, and the refrigerant gas is compressed. The refrigerant gas compressed in the compressor working chamber flows into the oil separator 4 through the discharge port 14 and the discharge chamber 13, is separated from the oil by the oil separator 4, and then is supplied to the outside from the discharge port 6. The
ここで、本実施例のスクリュー圧縮機のモータケーシング１には熱交換器４１が一体で形成される。熱交換器４１は、モータケーシング１とモータステータ７との接触位置（モータケーシング１がモータステータ７を支持する位置）の径方向外側のモータケーシング１に配置される（つまり、モータケーシング１とモータステータ７との間には冷媒流路１１が位置しない。）。また、熱交換器４１の外面には、複数のフィン４０が形成される。 Here, the heat exchanger 41 is integrally formed in the motor casing 1 of the screw compressor of the present embodiment. The heat exchanger 41 is disposed in the motor casing 1 radially outside the contact position between the motor casing 1 and the motor stator 7 (position where the motor casing 1 supports the motor stator 7) (that is, the motor casing 1 and the motor The refrigerant flow path 11 is not located between the stator 7). A plurality of fins 40 are formed on the outer surface of the heat exchanger 41.
熱交換器４１の内部には油の流路５２が形成され、油流路５２には油配管５０、５１が接続される。油配管５０は、カバー３１を介して油溜め１０に接続されており、油溜め１０から熱交換器４１に油を供給する。油配管５１は、メインケーシング２に形成された油流路７０に接続されており、熱交換器４１で冷却された油は、軸受２１、２０を潤滑後、吸入ポート１２に排出される。また、油配管５１は、吐出ケーシング３に形成された油流路７１にも接続されており、軸受２２、２３、２４、２５を潤滑後、雄ロータ９Ａ及び雌ロータ９Ｂの歯溝とボア１５、１６とで形成される圧縮作動室内に排出される。 An oil passage 52 is formed inside the heat exchanger 41, and oil pipes 50 and 51 are connected to the oil passage 52. The oil pipe 50 is connected to the oil sump 10 via the cover 31 and supplies oil from the oil sump 10 to the heat exchanger 41. The oil pipe 51 is connected to an oil passage 70 formed in the main casing 2, and the oil cooled by the heat exchanger 41 is discharged to the suction port 12 after lubricating the bearings 21 and 20. The oil pipe 51 is also connected to an oil passage 71 formed in the discharge casing 3, and after lubricating the bearings 22, 23, 24, 25, the tooth grooves and the bores 15 of the male rotor 9 </ b> A and the female rotor 9 </ b> B. , 16 are discharged into a compression working chamber.
このように構成されたスクリュー圧縮機は、以下のように作用する。つまり、油溜め１０内の高温の油は、モータケーシング１に一体で設けた熱交換器４１に流入する。熱交換器４１に流入した油は、熱交換器４１内に油流路５２内を流れる。この過程で、モータケーシング１内に形成された熱交換器４１の油流路５２と外部の空気とが熱交換する（つまり、モータケーシング１が油流路５２内を流れる油と外部の空気との熱交換する熱交換器としても機能する。）。特に、本実施例においては、熱交換器４１の外表面に複数の放熱フィンがモータケーシングと一体に形成されており、この放熱フィンを介して放熱が促進される。外気と接触する表面積を増すことができるから、油を効率的に冷やすことができる。このように、空気の温度に対して油温が高い場合には、熱交換により油温が低下して、冷却された油と冷媒ガスとが熱交換することにより吸入ガス温度が低下し、ガス密度が増えるため冷媒循環量が増加し性能向上する。 The screw compressor configured as described above operates as follows. That is, the hot oil in the oil sump 10 flows into the heat exchanger 41 provided integrally with the motor casing 1. The oil that has flowed into the heat exchanger 41 flows through the oil flow path 52 into the heat exchanger 41. In this process, heat exchange is performed between the oil flow path 52 of the heat exchanger 41 formed in the motor casing 1 and the external air (that is, the oil flowing through the oil flow path 52 and the external air between the motor casing 1 and the external air). It also functions as a heat exchanger for exchanging heat.) In particular, in this embodiment, a plurality of radiating fins are formed integrally with the motor casing on the outer surface of the heat exchanger 41, and heat dissipation is promoted through the radiating fins. Since the surface area in contact with the outside air can be increased, the oil can be cooled efficiently. Thus, when the oil temperature is higher than the air temperature, the oil temperature decreases due to heat exchange, and the intake oil temperature decreases due to heat exchange between the cooled oil and the refrigerant gas. Since the density increases, the refrigerant circulation rate increases and the performance improves.
更に、冷却された油を圧縮作動室に供給することで動力が軽減する。また、スクリューロータ９Ａ、９Ｂの熱変形が軽減されることで、雄ロータ９Ａと雌ロータ９Ｂの噛み合わせ部の隙間からの漏れが軽減する。かつ、油の粘度が増加するため圧縮作動室の隙間からの漏れを低減できる。これらの作用により、スクリュー圧縮機の性能が向上する。 Furthermore, power is reduced by supplying cooled oil to the compression working chamber. Further, since the thermal deformation of the screw rotors 9A and 9B is reduced, leakage from the gap between the meshing portions of the male rotor 9A and the female rotor 9B is reduced. And since the viscosity of oil increases, the leak from the clearance gap between compression working chambers can be reduced. These effects improve the performance of the screw compressor.
また、空気の温度に対して油温が低い場合には、空気との熱交換により油温が上昇するため、油の粘度が低減し、軸受内部の油の攪拌損失が低減するので、性能が向上する。 In addition, when the oil temperature is lower than the air temperature, the oil temperature rises due to heat exchange with the air, so the viscosity of the oil is reduced and the oil stirring loss inside the bearing is reduced. improves.
ここで、熱交換器４１の位置は、モータケーシング１とモータステータ７が接触する位置の径方向外側のモータケーシング１に形成されるので（モータケーシング１とモータステータ７との間には冷媒流路１１が位置しないので）、熱交換器４１内の油流路５２と冷媒流路１１との距離を離すことができる。従って、油流路５２を流れる油の熱による冷媒流路１１を流れる冷媒ガスの過熱を抑制することができる。 Here, the position of the heat exchanger 41 is formed in the motor casing 1 radially outside the position where the motor casing 1 and the motor stator 7 are in contact (the refrigerant flow between the motor casing 1 and the motor stator 7). Since the path 11 is not located), the distance between the oil flow path 52 and the refrigerant flow path 11 in the heat exchanger 41 can be increased. Therefore, overheating of the refrigerant gas flowing through the refrigerant flow path 11 due to the heat of the oil flowing through the oil flow path 52 can be suppressed.
ここで、熱交換器４１内部に設けられた油流路５２を複数に分岐する（多パスにする）ことで、熱交換器４１内の流路５２表面積を拡大でき、かつ、流路５２内を流動する油が流路５２表面に接触しやすくなるため、熱交換器４１を小型化することができる。 Here, the surface area of the flow path 52 in the heat exchanger 41 can be increased by branching the oil flow path 52 provided in the heat exchanger 41 into a plurality of (multipath), and the flow path 52 Therefore, the heat exchanger 41 can be downsized.
尚、本実施例においては、熱交換器４１をモータケーシング１とモータステータ７との接触位置の径方向外側のモータケーシング１に配置したが、これに限られない。すなわち、例えば図６及び図７で示すように、モータケーシング１に設けた冷媒流路１１とモータケーシング１内部の油流路５２との間に断熱材６０を配置してもよい。冷媒流路１１とモータケーシング１内部の油流路５２との間に断熱材６０を配置することにより、油流路５２の熱は、断熱材６０に阻まれ、冷媒流路１１を流れるガスに熱伝達し難くなる。 In addition, in the present Example, although the heat exchanger 41 was arrange | positioned in the motor casing 1 of the radial direction outer side of the contact position of the motor casing 1 and the motor stator 7, it is not restricted to this. That is, for example, as shown in FIGS. 6 and 7, a heat insulating material 60 may be disposed between the refrigerant flow path 11 provided in the motor casing 1 and the oil flow path 52 inside the motor casing 1. By disposing the heat insulating material 60 between the refrigerant flow path 11 and the oil flow path 52 inside the motor casing 1, the heat of the oil flow path 52 is blocked by the heat insulating material 60, and the gas flowing through the refrigerant flow path 11 is converted into gas. It becomes difficult to transfer heat.
１：モータケーシング
２：メインケーシング
３：吐出ケーシング
４：油分離器
５：吸入口
６：吐出口
３１：カバー
４０：フィン
４１：熱交換器
５０：油配管
５１：油配管
７０：圧縮機本体
1: Motor casing 2: Main casing 3: Discharge casing 4: Oil separator 5: Suction port 6: Discharge port 31: Cover 40: Fin 41: Heat exchanger 50: Oil piping 51: Oil piping 70: Compressor body
Claims (5)
前記スクリューロータを駆動するモータと、
前記スクリューロータを支持する軸受と、
前記スクリューロータ、前記モータ、及び、前記軸受を収納するケーシングと、
前記スクリューロータから吐出した冷媒を冷媒ガスと油に分離する油分離器と、
前記ケーシングに一体で形成された熱交換器と、
を備え、
前記油分離器で分離された油は前記熱交換器内の油流路を経由して前記軸受に供給されるスクリュー圧縮機。 A screw rotor for compressing the refrigerant;
A motor for driving the screw rotor;
A bearing for supporting the screw rotor;
A casing for housing the screw rotor, the motor, and the bearing;
An oil separator that separates refrigerant discharged from the screw rotor into refrigerant gas and oil;
A heat exchanger formed integrally with the casing;
With
A screw compressor in which oil separated by the oil separator is supplied to the bearing via an oil flow path in the heat exchanger.
前記ケーシングが前記モータを支持する位置の径方向外側に前記熱交換器が形成されるスクリュー圧縮機。 In Claim 1, the motor is supported by the casing, and a refrigerant flow path that guides the refrigerant sucked into the casing to the screw rotor is formed between the casing and the motor.
A screw compressor in which the heat exchanger is formed on a radially outer side of a position where the casing supports the motor.
前記冷媒流路の径方向外側に前記熱交換器が形成され、
前記冷媒流路と前記油流路との間に断熱材が配置されるスクリュー圧縮機。 In Claim 1, the motor is supported by the casing, and a refrigerant flow path that guides the refrigerant sucked into the casing to the screw rotor is formed between the casing and the motor.
The heat exchanger is formed radially outside the refrigerant flow path;
A screw compressor in which a heat insulating material is disposed between the refrigerant channel and the oil channel.
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| CN114072298A (en) * | 2019-09-17 | 2022-02-18 | 翰昂汽车零部件有限公司 | Compressor module |
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| TWI704098B (en) | 2019-08-20 | 2020-09-11 | 國立臺北商業大學 | Clamp type cleaning device for escalator handrail |
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