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1. 发明授权

KR860000182B1 BALANCE DEVICE FOR SCROLL-TYPE COMPRESSOR 失效
公开(公告)号：KR860000182B1
公开(公告)日：1986-02-28
申请号：KR820004663
申请日：1982-10-16
申请人： HITACHI LTD
发明人： HAJAKI EICHI , UCHIGAWA NAOSHI , TOJO KENJI , MURAYAMA AKIRA
IPC分类号： F04C23/02 , F01C1/02 , F04C18/02 , F04C23/00 , F04C29/00
摘要： A scroll-type compressor has the sum of the pressure receiving areas at the upper end surfaces of a crankshaft(9). The upper end surface of a balance weight is equal to the sum of the pressure receiving areas of the lower end surface of the shaft portion and the lower end surface of the balance weight. The surfaces are subjected to the internal pressures of the compressor. Consequently, the downward force is produced by the weights of the crankshaft and the rotor of a driving motor is applied to the crankshaft as an axial load which is born by a thrust bearing. Since the thrust bearing is required only to bear a small thrust load, it is free from problems such as rapid wear and seizure.

2. 发明专利

DE3627579A1 未知
公开(公告)号：DE3627579A1
公开(公告)日：1987-03-05
申请号：DE3627579
申请日：1986-08-14
申请人： HITACHI LTD
发明人： MURAYAMA AKIRA , UCHIKAWA NAOSHI , TAMURA TAKAHIRO , MIZUNO TAKAO , SAKURAI KAZUO
IPC分类号： F04C18/02 , F04C23/00 , F04C29/02 , F04C18/04
摘要： A scroll compressor comprises an orbiting scroll and a fixed scroll, each of which has a wrap formed on an end plate in upstanding position. These orbiting and fixed scrolls are assembled together with the wraps facing inwardly to each other so as to define a plurality of spaces by the wraps and the end plates of both scrolls. These spaces move toward the center of both scrolls during the orbiting movement of the orbiting scroll so as to reduce the respective capacities of the spaces. Thus, compression of a fluid is carried out. This compressor also includes a motor for driving the orbiting scroll and a driving shaft for connecting the orbiting scroll and the motor. At the end of the driving shaft on the motor side, a first oil supply pump is provided with its suction port communicating to an oil sump of the compressor. Also, a second oil supply pump communicating with the discharge side of the second oil supply pump is provided at the end of the driving shaft on the compressor section side, whereby the oil supply pump of the compressor is made of a multistage type.

3. 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.

4. 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.

5. 发明专利

DE3626806A1 未知
公开(公告)号：DE3626806A1
公开(公告)日：1987-03-05
申请号：DE3626806
申请日：1986-08-08
申请人： HITACHI LTD
发明人： SHIIBAYASHI MASAO , MURAYAMA AKIRA
IPC分类号： C08F2/00 , C08F2/18 , C08F2/20 , C08F14/00 , C08F14/06 , C08F265/00 , C08F265/02 , C08F267/02 , F04C18/02 , F04C18/06 , F04C23/00 , F04C23/02 , F04C29/00 , F04C18/04
摘要： A hermetic scroll compressor has a scroll compressor section, a motor section and a hermetic casing which encases the compressor and motor sections. The space in the casing is divided into an upper chamber and a lower chamber by a frame by which a shaft interconnecting the compressor and motor sections is rotatably supported. The upper and lower chambers are communicated with each other through a communication passage which is formed in the outer periphery of the frame. The hermetic casing is composed of an upper section, a barrel section and a lower section which are welded together. The barrel section is formed by rolling a sheet into a cylindrical form and welding opposing ends of the rolled sheet so as to form a weld seam joint. The frame is fixed in the casing with the weld seam joint disposed within the circumferential width of the communication passage, so that the outer periphery of the frame is in tight contact with the inner periphery of the barrel section except for the portion where the communication passage is formed.

6. 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.

7. 发明专利

DE3438049A1 未知
公开(公告)号：DE3438049A1
公开(公告)日：1985-05-02
申请号：DE3438049
申请日：1984-10-17
申请人： HITACHI LTD
发明人： SHIIBAYASHI MASAO , KOTANI SUMIHISA , SUEFUJI KAZUTAKA , TOJO KENJI , MURAYAMA AKIRA
IPC分类号： F04C18/02 , F01C1/02 , F04C23/00 , F04C18/04
摘要： A scroll-type fluid machine having a stationary scroll member and an orbiting scroll member each of which includes a disc-like end plate and a spiral wrap extending axially from one side of the end plate, with the wraps of the scroll members meshing with each other to define therebetween closed compression chambers. The orbiting scroll member is disposed between the end plate of the stationary scroll member and a frame of the machine with a back clearance between the other side of the end plate of the orbiting scroll member side thereof and the opposing surface of the frame. The orbiting scroll member is driven to make an orbiting movement with respect to the stationary scroll member so that the compression chambers are progressively moved towards the center of the scroll members while decreasing their volumes, to thereby suck a fluid through a suction port in the stationary scroll member and compress the same to discharge the compressed fluid through a discharge port formed in the stationary scroll member. The radial clearance between the wraps of both scroll members is selected to meet a specific condition so as to avoid mutual contact between the wraps of the scroll members even when the orbiting scroll member is inclined with respect to the horizontal plane.

8. 发明专利

DE3142744A1 未知
公开(公告)号：DE3142744A1
公开(公告)日：1982-06-09
申请号：DE3142744
申请日：1981-10-28
申请人： HITACHI LTD
发明人： SUEFUJI KAZUTAKA , ARATA TETSUYA , TOMITA YOSHIKATSU , KOTANI SUMIHISA , UCHIKAWA NAOSHI , MURAYAMA AKIRA
IPC分类号： F04C18/02 , F04C23/00 , F04C28/06 , F04C28/16 , F25B1/04 , F25B13/00
摘要： A refrigerating system including a refrigeration circuit and a scroll type compressor provided with two volume control mechanisms to allow the system to selectively perform full load operation and unloaded operation. The scroll type compressor includes two scroll members of known construction meshing with each other to define compression chambers and a suction chamber and is combined with the refrigeration circuit having an outdoor heat exchanger, an expansion valve, an indoor heat exchanger and a four-way change-over valve to provide a heat pump type refrigerating system. The volume control mechanisms each include a pair of bypass apertures in the fixed scroll member communicating with a valve chamber having a valve member slidably mounted therein and normally biased to an open position by a spring. The bypass apertures, of which one communicates with the suction chamber and the other communicates with one of the compression chambers, and the valve chamber constitute a bypass passageway. A pressure introducing pipe opens in the valve chamber. Upward movement of the valve member brings the two bypass apertures in communication with each other through the valve chamber to enable the system to perform a volume control operation. In another application, four volume control mechanisms are located symmetrically and divided into two blocks through a flow passage switching device to assign two mechanisms to one block. By this arrangement, the system is able to perform volume control operation in three stages, or able to operate selectively at maximum load, intermediate load and minimum load.

9. 发明专利

DE3828090A1 未知
公开(公告)号：DE3828090A1
公开(公告)日：1989-03-02
申请号：DE3828090
申请日：1988-08-18
申请人： HITACHI LTD
发明人： SUEFUJI KAZUTAKA , SENSHU TAKAO , ARATA TETSUYA , MURAMATSU MASATOSHI , OKAMOTO JYOJI , MURAYAMA AKIRA
IPC分类号： F04C18/02 , F01C1/02
摘要： A scroll-type fluid machine comprises a stationary scroll member, an orbiting scroll member, a rotation-prevention mechanism for the orbiting scroll member, and a casting accommodating therein both members and the mechanism. The involute angle of a terminal end of a wrap of the orbiting scroll member is selected to be less than that of the wrap of the stationary scroll member by an angle which ranges between 60 DEG and 120 DEG , preferably, about 90 DEG , thereby reducing a level of force applied to the rotation-prevention mechanism which prevents the orbiting scroll member from rotating about its own axis.

10. 发明专利

DE3740726A1 未知
公开(公告)号：DE3740726A1
公开(公告)日：1988-06-09
申请号：DE3740726
申请日：1987-12-01
申请人： HITACHI LTD
发明人： UCHIKAWA NAOSHI , MURAYAMA AKIRA , ARATA TETSUYA
IPC分类号： F04C28/26 , F04C18/02 , F04C28/16 , F25B49/02 , F04C18/04
摘要： An air conditioner includes a scroll-type refrigerant compressor driven at a speed variable in accordance with the thermal load on the air conditioner. The compressor has stationary and orbiting scroll members assembled together to define compression chambers in which a refrigerant gas is compressed and finally discharged into a discharger chamber through a discharge port formed in the center of the end plate of the stationary scroll member. At least one bypass port and an associated check valve are provided in and on the end plate of the stationary scroll member at such a position that the check valve opens to allow the gas to be directly discharged from an associated compression chamber into the discharge chamber when the compressor is operated under such a condition that the ratio of the operation pressure ratio to the design pressure ratio of the compressor falls within a range between 0.5 and 0.75.

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