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1. 发明专利

JP2000179459A SCROLL COMPRESSOR 失效
公开(公告)号：JP2000179459A
公开(公告)日：2000-06-27
申请号：JP35728698
申请日：1998-12-16
申请人： HITACHI LTD , HITACHI SHIMIZU ENG CO LTD
发明人： TOJO KENJI , TOMITA YOSHIKATSU , MIZUNO TAKAO , HAGITA NAOMI
IPC分类号： F04B39/00 , F04C18/02
摘要： PROBLEM TO BE SOLVED: To average the load generated in a contact part between a roller and a track surface and to improve the bearing force of a roller bearing by providing the roller bearing treated by crowning in such a state as gradually reducing the axial curvature from the axial center of the cylinder roller toward the end in an engagement part between a drive shaft driving a compressor and a stationary member. SOLUTION: In driving a refrigerant compressor using HFC based refrigerant and at the same time using ester-based synthetic oil having compatibility with the HFC based refrigerant or ether-based synthetic oil for lubricant oil, the lubricant oil 14 in a sealed container 1 is sent to main bearings 9a, 9b and a rotational bearing 10 via a feed oil passage in the central part of the drive shaft 5. It is also fed for the lubrication of an autorotation prevention member 11 and a sliding part of a scroll member. In this case, the axial curvature of the roller of the main bearing 9a composed of a cylinder roller bearing is treated by crowning as gradually reducing exponential-functionally from the center toward the longitudinal outside according to the length from the axial center. This constitution can eliminate the stress concentration in the axial end of the roller and improve the bearing force of the roller bearing.

2. 发明专利

JPH0617781A HORIZONTAL SCROLL COMPRESSOR 失效
公开(公告)号：JPH0617781A
公开(公告)日：1994-01-25
申请号：JP15007191
申请日：1991-06-21
申请人： HITACHI LTD , HITACHI SHIMIZU ENG KK
发明人： MURAYAMA AKIRA , KURODA SHIGEAKI , SADO SHINTARO , FUKUISHI TADASHI , HAGITA NAOMI
IPC分类号： F04C18/02 , F04C28/26 , F04C29/00 , F04C29/02 , F04C29/12
摘要： PURPOSE:To always hold a suction port in oil and to perform the reliable feed of oil by opening a suction port, through which oil is fed to the slide part of a compression mechanism part, to a delivery chamber and disposing a feed oil passage, through which the delivery chamber is communicated with an electric motor chamber, in a position above the suction port. CONSTITUTION:A horizontal scroll compressor is formed such that a scroll compression mechanism 2 is horizontally disposed in a closed container 1, and comprises a compression mechanism 3 and an electric motor part 4. Further, the compression mechanism part 3 comprises a revolving scroll 5 and a fixed scroll 6. Moreover, the interior of the closed container 1 is divided into a delivery chamber 1c and an electric motor chamber 1d. A suction port 6f for feed oil to the slide part of the compression mechanism part 3 is opened to the delivery chamber 1c and a feed oil passage through which the delivery chamber 1c is communicated with the electric motor chamber 1d is disposed in a position above the suction port 6f. This constitution holds the suction port 6f in oil and performs the reliable feed of oil.

3. 发明专利

JPH05288166A 失效
公开(公告)号：JPH05288166A
公开(公告)日：1993-11-02
申请号：JP9059092
申请日：1992-04-10
申请人： HITACHI LTD , HITACHI SHIMIZU ENG KK
发明人： UEDA HIDEYUKI , TOJO KENJI , HAGITA NAOMI , IGARASHI YUTAKA
IPC分类号： F04C18/02 , F04C29/00 , F04C29/12
摘要： PURPOSE:To suppress the temperature rise of discharge gas and secure the pressing force of a turning scross to a fixed scroll even in the case of a ratio between inlet pressure and discharge pressure being large in a scross compressor with a back pressure chamber used as a refrigerating and air-conditioning refrigerant compressor. CONSTITUTION:Liquid refrigerant injected, through an injection hole 7a, into a compression chamber communicated with a back pressure chamber 15 through a communication path 5c flows into the back pressure chamber 15 through the communication path 5c so as to lower the temperature in the back pressure chamber 15 and to raise the back pressure. The liquid refriegerant further flows into a compression chamber communicated with the back pressure chamber through another communication path 5d so as to lower the temperature in the compression chamber. With the liquid refrigerant thus injected into the compression chamber communicated with the back pressure chamber through the communication path, the temperature rise of discharge gas is suppressed, and the pressing force of a turning scross to a fixed scross can be secured even in dthe case of a ratio between inlet pressure and discharge pressure being large.

4. 发明专利

JP2000249084A SCROLL COMPRESSOR 失效
公开(公告)号：JP2000249084A
公开(公告)日：2000-09-12
申请号：JP5224199
申请日：1999-03-01
申请人： HITACHI LTD
发明人： SHIIBAYASHI MASAO , IIZUKA YASUNARI , HAGITA NAOMI , AOKI YOSHITAKE , TOJO KENJI , TAKEBAYASHI MASAHIRO , TSUBONO ISAMU
IPC分类号： F04C18/02
摘要： PROBLEM TO BE SOLVED: To reduce the incurring of an overpressure loss through reduction of incurring of a pressure loss at the initial stage of a delivery process and to enhance reliability by preventing the occurrence of a gall and abnormal friction between two scrolls. SOLUTION: The laps 5b and 6b of a fixed scroll 5 and an orbiting scroll 6 are engaged with each other and moved around a compression chamber 8 to discharge compression gas through a discharge port. In a so formed scroll compressor, a step-form groove part 50 to intercommunicate the compression chamber 8 and the discharge port is provided at a tooth bottom before the lap outside of the orbiting scroll 6 to form a compression chamber 8 is positioned in the discharge port.

5. 发明专利

JPH0544664A HORIZONTAL TYPE SCROLL COMPRESSOR 失效
公开(公告)号：JPH0544664A
公开(公告)日：1993-02-23
申请号：JP20070191
申请日：1991-08-09
申请人： HITACHI LTD , HITACHI SHIMIZU ENG KK
发明人： IGARASHI YUTAKA , TOJO KENJI , SADO SHINTARO , KUNO HIROYUKI , MURAYAMA AKIRA , FUKUISHI TADASHI , HAGITA NAOMI
IPC分类号： F04C18/02
摘要： PURPOSE:To directly supply oil to a sliding surface in the end plate outer peripheral part of a fixed scroll and a turning scroll from a bottom part oil reservoir, free from the mixing of gas, in a sealed type horizontal scroll compressor. CONSTITUTION:The inside of a sealed container 1 is divided into a discharge chamber 1a and a motor chamber 1b which have the bottom part oil reservoirs 6a and 6b by a frame 11 and a fixed scroll 4 fixed on the frame 11, and a turning scroll 5 meshed with the fixed scroll is driven through a driving shaft 14 by a motor 3. The compressed gas is discharged into a discharge chamber 1a, and discharged outside the sealed container from a discharge pipe 19 through the upper part passages 18a and 18b and the motor chamber 1b. The oil in the bottom part oil reservoir 6b passes through an oil feeding passage 8b in the frame 11 opened in the oil reservoir 6b and the oil feeding passages 8a and 8c in a fixed scroll end plate 4a, and supplied, without gas mixture, to the sliding surfaces 41 in the peripheral part of both the scroll end plates, directly by the difference between the discharged gas pressure acting into the oil reservoir and the gas pressure which is not lower than that pressure and acts to the sliding surface 41.

6. 发明专利

JPH0539786A SCROLL COMPRESSOR 失效
公开(公告)号：JPH0539786A
公开(公告)日：1993-02-19
申请号：JP19387591
申请日：1991-08-02
申请人： HITACHI LTD , HITACHI SHIMIZU ENG KK
发明人： MITSUYAMA YUUJI , TOJO KENJI , HAGITA NAOMI
IPC分类号： F04C18/02
摘要： PURPOSE:To prevent gall by providing the tip part of a fixed scroll with a groove part to form a sump and by forcibly feeding oil to the fixed scroll tip. CONSTITUTION:The fixed scroll 2 of a scroll compressor is engaged with the swing scroll 3 of the scroll compressor to form a compression chamber 9. A groove part 50 is provided from the winding terminal end of the spirally wound of the fixed scroll 2 to the tip of a semi-winding part. Oil that has wetted the upper surface of the end plate 35 of the swing scroll 3 is stored in the groove part 50 on the fixed scroll to prevent gall at the tip of the fixed scroll 2. Oil mixed with a coolant gas is stored in a sump part 52 from a blowout hole 10 and is supplied to the groove part 50 through a conducting path 51. Thus, the abrasion and the seizure of the tip is prevented.

7. 发明专利

JPH03145589A SCROLL COMPRESSOR AND SCROLL TYPE REFRIGERATOR 失效
公开(公告)号：JPH03145589A
公开(公告)日：1991-06-20
申请号：JP28219889
申请日：1989-10-30
申请人： HITACHI LTD
发明人： MIZUNO TAKAO , HAGITA NAOMI , NAGATA KIMIO , AMADA ATSUSHI
IPC分类号： F04C18/02 , F04C29/04 , F04C29/12 , F25B1/00 , F25B1/04 , F25B1/10 , F25B5/02
摘要： PURPOSE:To enable highly efficient operation at a low temperature by forming a gas suction hole outside in the radial direction of a fixed scroll and a discharge hole in the central portion thereof respectively, and providing a gas injection hole and a liquid injection hole between these holes. CONSTITUTION:In a scroll compressor which houses a compression unit 102 having a fixed scroll 106 and a turning scroll 107 rotated by an electric motor in a closed vessel 101, the fixed scroll 106 is provided with a gas suction hole 110 outside in its radial direction and a gas discharge hole 113 inside. A gas injection hole 111 communicated with a condenser outlet side via a pipe 10 and a liquid injection hole 112 communication with a liquid cooler via a pipe 9 are formed between those holes 110, 113. These injection holes 111, 112 and the suction hole 110 are set, during a period from a suction stroke to a discharge stroke, in positions where they are not mutually communicated substantially.

8. 发明专利

JPH0363461A OVERHEAT PROTECTING METHOD FOR SET CAPACITY TYPE COMPRESSOR 失效
公开(公告)号：JPH0363461A
公开(公告)日：1991-03-19
申请号：JP19659589
申请日：1989-07-31
申请人： HITACHI LTD , HITACHI SHIMIZU ENG KK
发明人： HAGITA NAOMI , MIZUNO TAKAO
IPC分类号： F25B1/00
摘要： PURPOSE:To inhibit the increase of compressive power by communicating a connecting pipe so that mean pressure in a compression chamber, through which a gas introduced during a pressure stroke is communicated, is made lower than the pressure of condensation under minimum operating-pressure ratio conditions requiring the introduction of a liquid refrigerant within a range that the pressure of condensation and evaporation can be fluctuated. CONSTITUTION:A liquid refrigerant can be introduced under the conditions of an operating pressure ratio of P or more including an operating-pressure range R requiring the introduction of the liquid refrigerant by communicating a connecting pipe 5 so that the pressure ratio of connecting-pipe communicating-position mean pressure during a compression stroke to the pressure of evaporation is brought to P or less or a value lower than P only by approximately 0.5, thus cooling a compressor. The liquid refrigerant is not introduced under the conditions of an operating pressure ratio P or less containing an operating pressure range S needing no cooling of the compressor. Accordingly, there are no overheating due to short cooling, over-compression due to supercooling, etc., thus ensuring high reliability. The cooling of the compressor within a wide range and the inhibition of compressive-power increase can be attained by selectively controlling first and second connecting pipes.

9. 发明专利

JPH06330865A SCROLL COMPRESSOR 失效
公开(公告)号：JPH06330865A
公开(公告)日：1994-11-29
申请号：JP11815593
申请日：1993-05-20
申请人： HITACHI SHIMIZU ENG KK , HITACHI LTD
发明人： HAGITA NAOMI , TOJO KENJI , UEDA HIDEYUKI
IPC分类号： F04C18/02 , F04C29/00 , F04C29/02
摘要： PURPOSE:To make improvements in lubricity by facilitating a job for lubrication to a sliding surface of the key side of an Oldham's key installed in an Oldham's mechanism. CONSTITUTION:A hole or passage is installed in the bottom face or side face of a keyway regulating any motion in a key part of an Oldham's mechanism installed in a base 11a in a frame 11 clamped with a fixed scroll 4, and thereby lubricating oil in a back pressure chamber 20 is constituted so as to be easy to flow into the keyway 11b.

10. 发明专利

JPH0448160A FREEZING CYCLE DEVICE 失效
公开(公告)号：JPH0448160A
公开(公告)日：1992-02-18
申请号：JP15564790
申请日：1990-06-14
申请人： HITACHI LTD , HITACHI SHIMIZU ENG KK
发明人： HAGITA NAOMI , MIZUNO TAKAO
IPC分类号： F25B1/00 , F04C28/28 , F04C29/04 , F25B1/04 , F25B31/00
摘要： PURPOSE:To perform an effective prevention of an over-heating of a compressor and accomplish a high efficient operation under a simple controlling operation by a method wherein liquid refrigerant of high pressure is fed into a compressing chamber of a compressor of set volume type within a wide operating pressure range through a connecting pipe connected to the compressor at a proper connecting position. CONSTITUTION:When the highest discharged gas temperature which is allowable for a compres sor 1 is 100 deg.C, a connecting position between the first connecting pipe 16 and the compressor 1 is assumed to be such a position (m) as one where the liquid refrigerant of high pressure can be fed into the compression chamber of the compressor 1 at an operating pressure ratio more than the lowest operating pressure ratio in which the discharged gas temperature reaches 110 deg.C within an operating pressure range. A connecting position of the second connecting pipe 17 is determined in such a way as the liquid refrigerant of high pressure at an evaporat ing temperature of -45 deg.C can be fed into the compression chamber communicating with the second connecting pipe. That is, since an operating pressure ratio in which the liquid refrigerant of high pressure is required at an evaporation temperature of -45 deg.C is 7.0, the connecting position of the second connecting pipe 17 is determined in such a way that the ratio of a mean pressure to an evaporating pressure in the compression chamber communicat ing with the second connecting pipe becomes 6.5.

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