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1. 发明专利

JPH10148188A SCROLL FLUID MACHINE 失效
公开(公告)号：JPH10148188A
公开(公告)日：1998-06-02
申请号：JP30772696
申请日：1996-11-19
申请人： HITACHI LTD , HITACHI SHIMIZU ENG KK
发明人： IMAMURA HIROYUKI , TAMURA TAKAHIRO , SAKURAI KAZUO , MIYAKE SHIGEJI
IPC分类号： F04C29/00 , F04C18/02 , F04C29/02
摘要： PROBLEM TO BE SOLVED: To reduce the slant degree of a crank shaft so as to prevent uneven contact of a bearing by providing a first bearing on an engaging part of a slewing scroll and the crank shaft, providing a second bearing on a side near the slewing scroll, providing a third bearing on a side near a motor, and forming the second and third bearings as a rolling bearing. SOLUTION: In a vertical hermetic scroll compressor, an electric motor 10 is pressed and fastened into a sealed container 8, and a slewing scroll is slewing operated through a crank shaft. The axial part 16a of the crank shaft is supported by rolling bearings 17, 18 arranged on a frame 14, the rolling bearings 17, 18 are communicated with an intermediate pressure chamber 22, and a sealing device 23 is arranged downward the rolling bearing 18 in order to seal intermediate pressure. The crank part 16b of the crank shaft is fitted to a bearing 19 arranged on a back surface of the slewing scroll. An oiling passage 20 for leading lubricating oil to both rolling bearings 17, 18, the sealing device 23, and the bearing 19, is arranged along an axis of the shaft part 16a of the crank shaft in the crank shaft.

2. 发明专利

JPH0914165A REFRIGERANT ROTARY COMPRESSOR 失效
公开(公告)号：JPH0914165A
公开(公告)日：1997-01-14
申请号：JP16546095
申请日：1995-06-30
申请人： HITACHI LTD , HITACHI SHIMIZU ENG KK
发明人： MIYAKE SHIGEJI , TAMURA TAKAHIRO , IIZUKA YASUNARI , IMAMURA HIROYUKI
IPC分类号： F04C18/02 , F04C29/02
摘要： PURPOSE: To prevent the occurrence of run-out of oil by a method wherein the inside diameter part of the stator of an electric motor disposed in a closed container forms a passage for delivery gas compressed by a compression mechanism part, one end face part in an axial direction forms an inlet for delivery gas, and an oil separator rotated in synchronism with a rotor is arranged at the end part of the rotor of the electric motor. CONSTITUTION: When a revolving scroll 6 effects revolving movement with the aid of an electric motor 3, after refrigerant gas sucked through a suction pipe 15 is compressed through operation of a fixed scroll 5 and the revolving scroll 6, the refrigerant gas mixed with lubrication oil is delivered through a delivery hole 17 to the upper space 14 of a closed container 1. Further, the mixture passes, in order, through a gas passage 18, a guide passage 22, and a gas passage 26 and flows in a lower space 33. In the lower space 33, the mixture passes through an oil separator 29 from a lower end surface. But, the lower end face is positioned below the coil part of a stator 24, and since the outside diameter of the lower end face is larger than the inside diameter of the coil part of the stator 24, the refrigerant gas passes the oil separator 29 with high efficiency.

3. 发明专利

JPH07332265A HERMETIC SCROLL COMPRESSOR 失效
公开(公告)号：JPH07332265A
公开(公告)日：1995-12-22
申请号：JP12857394
申请日：1994-06-10
申请人： HITACHI LTD , HITACHI SHIMIZU ENG KK
发明人： MIYAKE SHIGEJI , TAMURA TAKAHIRO , IMAMURA HIROYUKI , IIZUKA YASUNARI
IPC分类号： F04C29/02 , F04C18/02 , F04C23/00 , F04C29/04
摘要： PURPOSE:To improve operation wherein lubricating oil contained in compressed refrigerant gas is separated and returned to an oil reservoir, to effectively prevent the occurrence of oil rise, and to reliably cool an electric motor. CONSTITUTION:A hermetic scroll compressor comprises a passage 18a to branch a passage, consisting of the groove 18 of the outer periphery of a frame 7 and the inner wall of a closed container, into a plurality of sections; and a throttle part 18b to change the velocity of a flow. The closed type scroll compressor is structured in such a manner that an impedance part 22 to impede a flow of refrigerant gas is located in a middle space between the branch part 18a and a delivery pipe 16.

4. 发明专利

JPH0526182A CLOSED TYPE SCROLL COMPRESSOR 失效
公开(公告)号：JPH0526182A
公开(公告)日：1993-02-02
申请号：JP17796991
申请日：1991-07-18
申请人： HITACHI LTD
发明人： TAMURA TAKAHIRO , SAKURAI KAZUO , MIYAKE SHIGEJI , MATSUNAGA MUTSUNORI
IPC分类号： F04C18/02 , F04C28/02 , F04C29/00 , F04C29/02 , F04C29/12 , F16L27/04
摘要： PURPOSE:To form the structure of supporting a driving shaft by a frame in a closed type scroll compressor in such a way as to absorb an assembling error and the movement of the driving shaft by communicating the motor side end face of the driving shaft with an oil sump. CONSTITUTION:A joint formed of the combination of a spherical sliding bearing, a sliding bearing, and the like is provided at a part for communicating the oil feed hole 7c of a driving shaft 7 with an oil sump. The oil sump and the oil feed hole in the driving shaft can be thereby communicated with each other by the joint provided with the spherical sliding bearing, and the joint is made movable in relation to an assembling error and the axial and omnidirectional movement of the driving shaft. Accordingly, there is no partial contact on the sliding member side, and assembling work can be performed simply.

5. 发明专利

JPH03258985A SCROLL COMPRESSOR 失效
公开(公告)号：JPH03258985A
公开(公告)日：1991-11-19
申请号：JP5364790
申请日：1990-03-07
申请人： HITACHI LTD
发明人： MIYAKE SHIGEJI , TAMURA TAKAHIRO , SAKURAI KAZUO
IPC分类号： F04C18/02
摘要： PURPOSE:To prevent a poor compression and increase operating pressure range by connecting a back pressure chamber with a discharge pressure part through a passage having a solenoid valve and a resistance means interposed therein, and providing a control means for increasing the pressure of the back pressure chamber in proportion to discharge pressure. CONSTITUTION:A back pressure chamber 17 is connected to a discharge pressure part 20 through a bypass pipe 27 in which a solenoid valve 26 and a resistance means 28 are interposed. When the actual pressure calculated by an integrated circuit 24 is lower than an optimum pressure by a certain fixed level or more, the integrated circuit 24 opens the solenoid valve 26 to communicate a discharge pipe 21 to the back pressure chamber 17. Thus, the pressure in the back pressure chamber 17 can be controlled to prevent a poor compression due to the poor adhesion of a turning scroll 6 with a fixed scroll 5 because of pressure lack in the back chamber 17, and operating range can be increased.

6. 发明专利

JPH03172591A SCROLL COMPRESSOR 失效
公开(公告)号：JPH03172591A
公开(公告)日：1991-07-25
申请号：JP30769489
申请日：1989-11-29
申请人： HITACHI LTD
发明人： MIYAKE SHIGEJI , TAMURA TAKAHIRO , SAKURAI KAZUO
IPC分类号： F04C18/02
摘要： PURPOSE:To prevent a compression failure and any seizure in a sliding part from occurring by interconnecting a back part of a turning scroll to an inlet pressure part and/or a discharge pressure part via a flow regulating valve, and controlling the opening of this flow regulating valve on the basis on at least either of inlet pressure and discharge pressure. CONSTITUTION:A scroll compressor compresses a refrigerant gas inhaled into a chamber in a gap with a fixed scroll 5 and discharges it out of a discharge hole 18 by rotating a turning scroll 6 by an electric motor 3 via a crankshaft 9. At this time, a part of compressed gas flows into a back pressure chamber 17 by way of a back pressure hole 16, thereby pressing this turning scroll 6 to the fixed scroll 5 by dint of its pressure. In this case, there is provided with a bypass pipe 27 connecting the back pressure chamber 17 and a discharge pipe 21, and then a flow regulating valve 26 is installed in the midway. This flow regulating valve 26 is adjusted in its opening in accordance with an optimum pressure calculated from each output of an intake sensor 22 and a discharge sensor 23 in an integrated circuit 24.

7. 发明专利

JPH03124985A SEALED SCROLL COMPRESSOR 失效
公开(公告)号：JPH03124985A
公开(公告)日：1991-05-28
申请号：JP26004289
申请日：1989-10-06
申请人： HITACHI LTD
发明人： MIYAKE SHIGEJI , TAMURA TAKAHIRO , SAKURAI KAZUO
IPC分类号： F04C29/12 , F04C18/02 , F04C29/00 , F04C29/04
摘要： PURPOSE:To prevent the life reduction or seizure of a motor and improve the reliability of a compressor by pressing and fastening a stator into a sealed container, and forming a passage connecting a space formed with the cut section on the outer periphery of the stator and the side wall in the sealed container to a discharge connection port. CONSTITUTION:The refrigerant gas is sucked through an intake port 21 and discharged through a discharge hole 15 at the center section of a fixed scroll 5. The discharged compressed refrigerant gas is guided to the lower section of a scroll compression mechanism section 2 through the fixed scroll 5 and a refrigerant passage 17 on the periphery section of a frame 7. This gas passes a gap between a stator 3a and a rotor 3b and a refrigerant passage 18a formed by the cut section on the outer periphery of the stator 3a and the inner side wall of a sealed container 1 and enters the chamber of a motor section 3 on the side opposite to the scroll compression mechanism section 2 to cool the motor section 3. It passes a refrigerant passage 18b formed by the other cut section on the outer periphery of the stator 3a and the inner side wall of the sealed container 1 and guided to a discharge connection port 19 through a guide passage 22 via a guide plate 20, then it flows to the outside of the sealed container 1.

8. 发明专利

JPH0326889A SCROLL COMPRESSOR 失效
公开(公告)号：JPH0326889A
公开(公告)日：1991-02-05
申请号：JP15678689
申请日：1989-06-21
申请人： HITACHI LTD
发明人： SAKURAI KAZUO , TAMURA TAKAHIRO , MIYAKE SHIGEJI
IPC分类号： F04C18/02
摘要： PURPOSE:To reduce the diameter and weight by forming an oil feeding hole which communicates to an oil reservoir in a seat surface part having a large width on the outer periphery of a tooth groove part which is continuous to the outermost periphery at the completion of the scroll lap winding of a fixed scroll. CONSTITUTION:A fixed scroll 6 has a circular acrc part 6g which is slightly larger than the max. lap engagement diameter, and has a recessed part 6h outside. Therefore, seat parts 6l and 6m for sealing a back pressure chamber and lap suction chambers 6j and 6k from the fixed scroll lap inner line 6i, circular arc part 6g, and the recessed part 6h are formed. At the completion of closing the lap suction chamber, an oil feeding hole 6f is arranged at the seat part 6l on the suction chamber 6j side surrounded by a swirl scroll outer line 6n and the fixed scroll inner line 6i among the seat parts 6l and 6m. In other words, the oil feeding hole 6f is positioned in the seat part 6l having a wide width which is formed on the outer periphery of the inner line 6i of the scroll lap which is continuous to the outermost periphery at the completion of the lap winding of the fixed scroll 6. Therefore, the base plate diameter of the swirl scroll, base plate diameter of the fixed scroll, and the outer peripheral diameter of a frame can be designed to the least values.

9. 发明专利

JP2006291861A Displacement compressor 审中-公开
标题翻译：位移压缩机
公开(公告)号：JP2006291861A
公开(公告)日：2006-10-26
申请号：JP2005114277
申请日：2005-04-12
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： FUJIMURA KAZUYUKI , TSUCHIYA TAKESHI , HAYASE ISAO , AOKI MAKOTO , YANASE YUICHI , NOZAWA SHIGEKAZU , MATSUNAGA MUTSUNORI , MIYAKE SHIGEJI , NAKAMURA SATOSHI , OTAWARA MASARU
IPC分类号： F04B39/02 , F04B39/06 , F04B39/12 , F04C18/02 , F04C29/02
摘要： PROBLEM TO BE SOLVED: To provide a displacement compressor with a motor having improved efficiency and shaft supporting portions and a sliding portion having improved reliability while restraining an increase in its installation cost and space.
SOLUTION: The displacement compressor comprises a sealed container 1 storing a compression part and a drive part for driving the compression part. It has an oiling path in which lubricating oil 13 stored in the sealed container 1 is forcibly circulated through shaft supporting portions 3c, 9. A pipe 20 as part of the oiling path is drawn to the outside of the sealed container 1 for heat exchange with outside air.
COPYRIGHT: (C)2007,JPO&INPIT

10. 发明专利

JPH05215084A SCROLL COMPRESSOR 失效
公开(公告)号：JPH05215084A
公开(公告)日：1993-08-24
申请号：JP1979092
申请日：1992-02-05
申请人： HITACHI LTD
发明人： SAKURAI KAZUO , TAMURA TAKAHIRO , MIYAKE SHIGEJI
IPC分类号： F04C18/02
摘要： PURPOSE:To ensure the strength of a lap root part and provide an easily workable lap form by providing stair-like notches on both side surfaces of spiral laps of a fixed scroll and a turning scroll. CONSTITUTION:A compressor part 2 has a fixed scroll having a spiral lap 5a and a scroll 6 having a spiral lap 6a, the laps being engaged to each other on a base plate. When the turning scroll 6 is turned through a crank shaft, the space formed by the turning scroll 6 and the fixed scroll 5 is reduced in volume as it is moved in scroll central direction to compress the sucked coolant gas. Since both the spiral laps 5a, 6a have stair-like notches 5b, 6b, the working surface is minimized, compared with the case having no notch, and easy to work, and the strength of the lap root part is ensured to make the lap difficult to curve.

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