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1. 发明专利

DE3706494A1 未知
公开(公告)号：DE3706494A1
公开(公告)日：1987-09-24
申请号：DE3706494
申请日：1987-02-27
申请人： HITACHI LTD
发明人： SHIIBAYASHI MASAO , KIKUCHI KATSUAKI , UCHIKAWA NAOSHI , OHISHI YASURO , MURAYAMA AKIRA , KUNO HIROAKI , FUKATSU KIYOSHI , TOMONO MINORU
IPC分类号： B01D46/00 , B01D46/24 , B01D46/54 , F04C29/02 , F04C18/04
摘要： A sealed scroll compressor comprises a scroll compressor section, an electric motor, a sealed container, an oil storage, a fixed and orbiting scroll members, and a wire mesh member for improvement of oil separation in refrigerant gas. A shell portion of said sealed container is lined annularly with the wire mesh member and the gas containing oil is adapted to flow downwardly along the wire mesh member. When the gas flows downwardly, the oil sticks to the wire mesh member and is separated from the gas. The oil collected on the wire mesh member drops down into the oil storage. The gas from which the oil is separated is, after that, discharged out of the compressor.

2. 发明专利

DE3600184A1 未知
公开(公告)号：DE3600184A1
公开(公告)日：1986-07-17
申请号：DE3600184
申请日：1986-01-07
申请人： HITACHI LTD
发明人： MURAYAMA AKIRA , KUNO HIROAKI , UCHIKAWA NAOSHI , TAMURA TAKAHIRO , MIZUNO TAKAO , AIBA KAZUMI , IKEDA MITSUO , FUKATSU KIYOSHI
IPC分类号： F04C18/02 , F01C1/02 , F01C1/04
摘要： A scroll-type fluid machine includes an orbiting scroll member and a stationary scroll member each of which has an end plate and a spiral wrap protruding upright therefrom. The scroll members are assembled together such that their wraps mesh with each other. Closed spaces are defined by the wraps and end plates of both scroll members, and are progressively moved towards the center of the scroll members while decreasing their volumes in accordance with an orbiting movement of the orbiting scroll member. The edges of the projecting end of the wrap of each scroll member are chamfered. Also, steps are formed in conformity with the configuration of each spiral wrap on respective corners of the groove bottom between adjacent turns of the wrap. The chamfered edges of the projecting end of the wrap of each scroll member faces the steps on the groove bottom of the opposing scroll member, respectively, when the scroll members are assembled together.

3. 发明专利

DE3422389A1 未知
公开(公告)号：DE3422389A1
公开(公告)日：1984-12-20
申请号：DE3422389
申请日：1984-06-15
申请人： HITACHI LTD
发明人： MURAYAMA AKIRA , KUNO HIROAKI , UCHIKAWA NAOSHI , TAMURA TAKAHIRO , MIZUNO TAKAO , KOTANI SUMIHISA , TOMITA YOSHIKATSU , ARATA TETSUYA , SHIIBAYASHI MASAO , SUEFUJI KAZUTAKA
IPC分类号： F04C18/02 , F04C23/00 , F04C27/00 , F01C1/04
摘要： A scroll-type fluid machine having an orbiting scroll member and a stationary scroll member each having an end plate and a spiral wrap of at least two turns protruding upright from one of the sides of the end plates. The orbiting scroll member has a back pressure chamber formed on the back side thereof and communicating with the compression spaces of the fluid machine through pressure equalizing ports formed in the orbiting scroll member, so that the pressure of the fluid under compression is introduced to the back pressure chamber to produce an axial thrusting force for pressing the orbiting scroll member towards the stationary scroll member. The positions of the pressure equalizing ports in terms of the wrap angle lambda of the wraps are selected to meet the following condition: lambda d> lambda > lambda d-2 pi , where, lambda d represents the wrap angle of the wraps when the volume of the compression spaces is minimized. The equalizing ports are positioned at lambda and lambda +2 pi .

4. 发明专利

DE3345073A1 未知
公开(公告)号：DE3345073A1
公开(公告)日：1984-06-20
申请号：DE3345073
申请日：1983-12-13
申请人： HITACHI LTD
发明人： MURAYAMA AKIRA , KUNO HIROAKI , UCHIKAWA NAOSHI , TAMURA TAKAHIRO , MIZUNO TAKAO , SHIIBAYASHI MASAO
IPC分类号： F04C29/02 , F01C1/02 , F04C23/00 , F04C18/04
摘要： A scroll fluid apparatus including a fixed scroll member and an orbiting scroll member each having an end plate and a wrap, the two scroll members being maintained in meshing engagement with each other with the respective wraps facing inwardly to allow the orbiting scroll member to move in orbiting movement with respect to the fixed scroll member without rotating on its own axis. The fixed scroll member is formed with a discharge port at its central portion and a suction port at its outer peripheral surface to draw a gas by suction through the suction port and allow same to flow in a sealed space defined between the two scroll members and reducing its space during operation to thereby compress the gas and discharge the compressed gas through the discharge port. A clearance is defined between an outer peripheral surface of the end plate of the orbiting scroll member and a wall facing the outer peripheral surface and successively changing its volume as the orbiting scroll member moves in orbiting movement, and at least one pressure relieving space is provided to communicate with the clearance for conveniently discharging a fluid from the clearance to avoid compression of the fluid.

5. 发明专利

GB2207704B HERMETIC TYPE SCROLL COMPRESSOR 未知
公开(公告)号：GB2207704B
公开(公告)日：1991-07-17
申请号：GB8815824
申请日：1988-07-04
申请人： HITACHI LTD
发明人： IZUNAGA YASUSHI , KUNO HIROAKI , SADO SHINTARO
IPC分类号： F04C18/02 , F04C28/28 , F04C29/02
摘要： In a scroll compressor, an open end of an oil extraction pipe which is placed in oil stored in a bottom portion of a hermetic casing is positioned at a location higher than an open end of an oil suction pipe that opens in the same stored oil, and a thermostat is provided for sensing a temperature rise of a compressed gas to cause the compressor to be stopped. Accordingly, even when an amount of oil injected into the compressed gas decreases, an amount of oil necessary for lubrication of a bearing portion is assured. The provision of the thermostat enables the compressor to be stopped before an amount of supply of the lubrication oil to the bearing portion has decreased. It is, accordingly, possible to positively prevent burning of the bearing portion of a crankshaft.

6. 发明专利

DE3935571A1 未知
公开(公告)号：DE3935571A1
公开(公告)日：1990-05-03
申请号：DE3935571
申请日：1989-10-25
申请人： HITACHI LTD , HITACHI SHIMIZU ENG KK
发明人： MURAYAMA AKIRA , KUNO HIROAKI , UCHIKAWA NAOSHI , OKAMOTO JYOJI , IMAMURA HIROYUKI
IPC分类号： F04C28/08 , F04C18/02 , F04C28/16 , F24F11/00 , F25B1/00 , F25B1/04 , F25B13/00 , F25B41/04 , F25B49/02
摘要： An air conditioner provided with a refrigerant circuit formed by connecting with piping a refrigerant compressor, a condenser, an expansion means and an evaporator, an inverter power supply means for controlling the rotational speed of an electric motor for driving the refrigerant compressor, a load detector, and a controller for controlling the inverter power supply means on the basis of an output from the load detector. A refrigerant flow passage controlling mechanism is provided to change the rate at which the refrigerant flows through the condenser on the basis of a control command from the controller, thereby making it possible to reduce or increase the discharge rate without extending the range of changes in the rotational speed of the compressor. The compressor can be controlled according to a wide range of changes in the load to operate with an operation range which ensures high efficiency of the compressor operation.

7. 发明专利

GB2207704A HERMETIC TYPE SCROLL COMPRESSOR 未知
公开(公告)号：GB2207704A
公开(公告)日：1989-02-08
申请号：GB8815824
申请日：1988-07-04
申请人： HITACHI LTD
发明人： IZUNAGA YASUSHI , KUNO HIROAKI , SADO SHINTARO
IPC分类号： F04C18/02 , F04C28/28 , F04C29/02 , F04C18/04
摘要： In a scroll compressor, an open end of an oil extraction pipe which is placed in oil stored in a bottom portion of a hermetic casing is positioned at a location higher than an open end of an oil suction pipe that opens in the same stored oil, and a thermostat is provided for sensing a temperature rise of a compressed gas to cause the compressor to be stopped. Accordingly, even when an amount of oil injected into the compressed gas decreases, an amount of oil necessary for lubrication of a bearing portion is assured. The provision of the thermostat enables the compressor to be stopped before an amount of supply of the lubrication oil to the bearing portion has decreased. It is, accordingly, possible to positively prevent burning of the bearing portion of a crankshaft.

8. 发明专利

DE3438262A1 未知
公开(公告)号：DE3438262A1
公开(公告)日：1985-05-09
申请号：DE3438262
申请日：1984-10-18
申请人： HITACHI LTD
发明人： MURAYAMA AKIRA , KUNO HIROAKI , UCHIKAWA NAOSHI , TAMURA TAKAHIRO , MIZUNO TAKAO , KOTANI SUMIHISA
IPC分类号： F04C18/02 , F04C23/00 , F04C28/26 , F04C28/28 , F04C29/00 , F25B31/02 , F04C18/04
摘要： Disclosed is a scroll-type fluid machine which has an orbiting scroll member and a stationary scroll member each having an end plate and a spiral wrap protruding upright therefrom. The scroll members are assembled together such that their wraps mesh with each other to form therebetween closed chambers of volumes which are progressively decreased as the chambers are moved toward the centers of the scroll members as a result of an orbital movement of the orbiting scroll member with respect to the stationary scroll member. The machine is suitable for use as a refrigerant compressor in a refrigeration system. A fluid check valve is disposed in the refrigerant gas suction passage connected to the suction side of the machine, so as to prevent any reversing of the orbiting scroll member. A passage is formed to provide a communication between a suction chamber defined by the scroll members and another closed chamber. A relief valve is disposed in this communication passage so as to relief any abnormal high pressure from the suction chamber.

9. 发明专利

DE3705863A1 未知
公开(公告)号：DE3705863A1
公开(公告)日：1987-08-27
申请号：DE3705863
申请日：1987-02-24
申请人： HITACHI LTD
发明人： MURAYAMA AKIRA , UCHIKAWA NAOSHI , KUROSHIMA RYOICHI , KUNO HIROAKI , ARATA TETSUYA , SHIIBAYASHI MASAO
IPC分类号： F04C28/28 , F04B39/10 , F04C18/02 , F04C23/00 , F04C29/00 , F04C18/04
摘要： A scroll compressor is provided with a two groups of commmunication ports formed in and extending through an end plate of a stationary scroll member. Each group includes two or more communication ports. A lead valve is associated with each of the two groups of communication ports and is operable by a pressure differential in between an associated compression chamber and the discharge chamber to communicate the communication ports of the group to the discharge chamber to prevent the occurrence of over-compression in the compression chamber.

10. 发明专利

DE3529929A1 未知
公开(公告)号：DE3529929A1
公开(公告)日：1986-03-06
申请号：DE3529929
申请日：1985-08-21
申请人： HITACHI LTD
发明人： MIZUNO TAKAO , ARATA TETSUYA , UCHIKAWA NAOSHI , MURAYAMA AKIRA , TAMURA TAKAHIRO , KUNO HIROAKI
IPC分类号： F04C18/02 , F04C27/00 , F04C29/02 , F04C29/10 , F04C18/04

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