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1. 发明专利

JPH0396691A TWO-CYLINDER ROTARY TYPE COMPRESSOR 失效
公开(公告)号：JPH0396691A
公开(公告)日：1991-04-22
申请号：JP23374189
申请日：1989-09-08
申请人： MITSUBISHI ELECTRIC CORP
发明人： SHIRAFUJI YOSHINORI , SATO YUTAKA , KOBAYAKAWA TAIICHI , TAKIMOTO SUNAO , SUZUKI KENJI , HAGIWARA SHOJI , SUZUKI SATOSHI
IPC分类号： F04C23/00 , F04C29/00 , F04C29/12
摘要： PURPOSE:To improve the pressure-resisting strength and the sealing property by applying a burring process only to one side of plural insertion holes responding to plural suction pipes in a sealed container, and providing a projecting joint pipe to the other side pipe. CONSTITUTION:By rotating a driving shaft 4 with an electromotive element 2, plural rolling pistons 10 and 11 eccentric 180 deg. each other are rotated in plural cylinders 5 and 6. As a result, a coolant gas is led into the upper and the lower cylinders 5 and 6 in a sealed container 1 from an accumulator 12 by plural suction pipes 13 and 14 which are independent each other. In this case, a burring process is applied to the insertion hole of the sealed container 1 responding to the suction pipe 13 linking to the larger diameter of cylinder 5. And the other side cylinder 6 is set in the diameter smaller than that of the cylinder 5. And by utilizing a clearance between the outer circumferential surface of the cylinder 6 and the inner surface of the sealed container 1, a joint pipe 16 is projected.

2. 发明专利

JPH02252992A MULTIPLE CYLINDER ROTARY COMPRESSOR 失效
公开(公告)号：JPH02252992A
公开(公告)日：1990-10-11
申请号：JP7434189
申请日：1989-03-27
申请人： MITSUBISHI ELECTRIC CORP
发明人： KAWASAKI KATSUYUKI , KOBAYAKAWA TAIICHI , SUZUKI SATOSHI , WADA KATSUYOSHI
IPC分类号： F04C23/00 , F04C18/356
摘要： PURPOSE:To enable volume control in a wide range, by connecting an intermediate part between an intake part and a discharge part inside a cylinder which is at least one compression element among a plurality of compression elements stored in a closed container, selectively to the high/low pressure part of an outside refrigerating cycle through a bypass passage. CONSTITUTION:Two compression elements are constituted in such a way that rolling pistons 5a, 5b are fitted rotabably to eccentric parts 4a, 4b, installed with mutually shifted phases by 180 degree of a crank shaft 2 rotated by an electrically driven element 1 stored in a closed container 10, and also the rolling pistons 5a, 5b are rotated in respective cylinders 7a, 7b. The compression element on one side including the piston 5b, can be put in rest condition timely by a resting cylinder control system 21. In this occasion, a bypass passage 29 connected to an opening part 28 opened to the intermediate part between the intake part inside the cylinder 7a and the discharge part, is provided on the cylinder 7a serving as the compression element on the other side, and this bypass passage 29 can be connected selectively to the low and high pressure parts in an outside refrigerating cycle by a switching valve (not shown in figure) through a bypass pipe 32.

3. 发明专利

JPH0286985A ROTARY COMPRESSOR 失效
公开(公告)号：JPH0286985A
公开(公告)日：1990-03-27
申请号：JP23776588
申请日：1988-09-22
申请人： MITSUBISHI ELECTRIC CORP
发明人： SUZUKI SATOSHI , KAWASAKI KATSUYUKI , KOBAYAKAWA TAIICHI , SHIRAFUJI YOSHINORI , WADA KATSUYOSHI
IPC分类号： F04C29/00 , F04C23/00
摘要： PURPOSE:To reduce the deflection of a crankshaft as well as to keep off any seizure or binding due to one-sided contact of the shaft by forming at least one side of a main bearing and an end bear extendedly up to an inner space of a piston beyond a seat surface of a cylinder. CONSTITUTION:A rotary compressor is provided with a hermetrically sealed vessel 1, a crankshaft 4 being driven by a motor element 2 housed in this vessel 1, a piston 5 being fitted in an eccentric part 4a of this crankshaft 4 free of rotation and compressing a refrigerant by rotating in a cylinder 6, and a main bearing 7 and an end bearing 8 supporting the crankshaft 4 and being attached to both seat surfaces of the cylinder 6. In this case, each bearing surface of the main bearing 7 and the end bearing 8 is formed extendedly up to inner space of the piston 5 beyond the seat surface. With this constitution, a distance between the main bearing 7 and the end bearing 8 is shortened, thus deflection of the crankshaft 4 due to compressive load is made smaller.

4. 发明专利

JPH01244192A MULTICYLINDER ROTARY COMPRESSOR 失效
公开(公告)号：JPH01244192A
公开(公告)日：1989-09-28
申请号：JP7150088
申请日：1988-03-25
申请人： MITSUBISHI ELECTRIC CORP
发明人： SUZUKI SATOSHI , KAWASAKI KATSUYUKI , SHIRAFUJI YOSHINORI , KOBAYAKAWA TAIICHI
IPC分类号： F04C23/00 , F04C29/04
摘要： PURPOSE:To prevent any overheating in a cylinder resting compression space from occurring by installing a liquid injection cooling means, being interconnected to a high pressure refrigerant circuit of a refrigerating cycle, in the compression space of a compression element with a cylinder resting control mechanism. CONSTITUTION:At the time of cylinder resting control, a high pressure refrigerant in a refrigerant-air-conditioning system circuit is spouted out of an injection port 23 into a compression space 16 of a compression element 4 through an injection pipeline 24 and an injection passage 21 after being dropped in pressure up to intermediate pressure via a capillary tube 25 of a liquid injection cooling circuit 26. At this time, since the liquid refrigerant is evaporated as absorbing heat of vaporization from the circumference, temperature in a compressor goes down.

5. 发明专利

JPS63219896A ROTARY TYPE COMPRESSOR 失效
公开(公告)号：JPS63219896A
公开(公告)日：1988-09-13
申请号：JP5360387
申请日：1987-03-09
申请人： MITSUBISHI ELECTRIC CORP
发明人： KOBAYAKAWA TAIICHI , HIRAHARA TAKUO , YAMAMOTO TAKASHI
IPC分类号： F04C28/00 , F04C18/356 , F04C28/10 , F04C29/06 , F04C29/12
摘要： PURPOSE:To make the operation of a delivery valve smooth by closing an opening end toward the inside of enclosed vessel in the valve chamber of the delivery valve by a rotary member fitted to the lower end of a rotor just before the delivery valve opens. CONSTITUTION:A rotary member 20 is fitted to the lower end of a rotor 17 under a stacked condition together with a balance weight 18. The rotary member 20 is provided to close an opening end toward the inside of enclosed vessel 13 of a cylindrical valve chamber 9 just before a delivery valve 7 fitted inside begins to open. The turning movement of the rotary member 20 opens the valve chamber 9 and the turning movement conducts the operation of carrying cooling medium gas out of the inside of the valve chamber 9 so that the back pressure of the delivery valve 7 may be lower temporarily. Therefore, the opening operation of the delivery valve 7 is smoothly carried out.

6. 发明专利

JPH099537A PERMANENT MAGNET MOTOR 失效
公开(公告)号：JPH099537A
公开(公告)日：1997-01-10
申请号：JP25048495
申请日：1995-09-28
申请人： MITSUBISHI ELECTRIC CORP
发明人： TAJIMA YASUYOSHI , OIKAWA TOMOAKI , SUZUKI YASUMASA , KOBAYAKAWA TAIICHI , YAMASHIRO YUKIHIRO , BABA KAZUHIKO
IPC分类号： H02K29/00 , H02K1/22 , H02K1/27 , H02K15/03 , H02K21/16
摘要： PROBLEM TO BE SOLVED: To improve the efficiency of a permanent magnet motor by a method wherein a necessary strength is given to a rotor core and, further, leakage flux between adjacent poles is reduced. SOLUTION: V-shaped magnet fitting holes 5 are provided in a rotor core 4. Permanent magnets 10 which have rectangular cross-sections are fitted to the holes 5. Pole linking parts 7 which exist between the side planes of the permanent magnets 10 and the outer circumference of the rotor core 4 are composed of narrow parts 7a and wide parts 7b adjacent to the narrow parts 7a. Flux is saturated in the narrow parts 7a, so that leakage flux between adjacent poles 6 can be reduced. The wide parts 7b meet the centrifugal force of the permanent magnets 10 by their planes.

7. 发明专利

JP2556947B2 失效
公开(公告)号：JP2556947B2
公开(公告)日：1996-11-27
申请号：JP10271592
申请日：1992-04-22
申请人： MITSUBISHI ELECTRIC CORP
发明人： KATO TARO , KOBAYAKAWA TAIICHI , SUZUKI SATOSHI , SATO YUTAKA
IPC分类号： F04C29/02 , F04B39/04

8. 发明专利

JPH0333493A ENCLOSED ROTARY COMPRESSOR 失效
公开(公告)号：JPH0333493A
公开(公告)日：1991-02-13
申请号：JP16835589
申请日：1989-06-30
申请人： MITSUBISHI ELECTRIC CORP
发明人： KOBAYAKAWA TAIICHI , KAWASAKI KATSUYUKI , SUZUKI SATOSHI , WADA KATSUYOSHI
IPC分类号： F04C29/02
摘要： PURPOSE:To ensure oil supply by furnishing a throttle plate so as to be situated in the lower bearing in the neighborhood of the bottom of an oil supply hole bored in a crank shaft, installing an oil supply pipe at this throttle plate, and thereby preventing drop of the oil level due to rotation. CONSTITUTION:A cylindrical throttle plate 17 with the lower part opened is fitted in the bottom opening of a lower bearing 6 of a crank shaft 4, and an oil supply pipe 15 is penetrated in the top center of this throttle plate 17. The bottom of this oil supply pipe 15 extends to a point very near the bottom surface of an enclosed vessel 1 and is left opened. A minute gap is retained between the bottom of the crank shaft 4 and the top of the throttle plate 17. In the lower part of this vessel 1, lubricant 14 is stored. When the crank shaft 4 rotates, the pressure distribution in the surrounding area assumes a parabolic curve with its rotational center the lowest to generate a differential pressure in the oil supply pipe 15 and in the vessel 1, and thereby the lubricant 14 is led to the oil supply hole 4b in the shaft 4. At this time, the oil supply pipe 15 remains out of rotation, so that no drop of the oil level occurs, and the lubricant is held in the gap to allow utilization for lubrication.

9. 发明专利

JPH0286988A OIL FEEDER FOR ENCLOSED COMPRESSOR 失效
公开(公告)号：JPH0286988A
公开(公告)日：1990-03-27
申请号：JP23777388
申请日：1988-09-22
申请人： MITSUBISHI ELECTRIC CORP
发明人： SHIRAFUJI YOSHINORI , KAWASAKI KATSUYUKI , KOBAYAKAWA TAIICHI , SUZUKI SATOSHI , WADA KATSUYOSHI
IPC分类号： F04C29/02
摘要： PURPOSE:To prevent spinning force by rotation of a crankshaft from being transmitted to oil, interrupting a flow of the oil in the spinning direction, and thereby keep oil stored in the bottom of a hermetically sealed vessel so calmly as well as to prevent any foreign substances from flowing into a lubricator by installing an oil spinning flow interrupting means in the crankshaft. CONSTITUTION:When a crankshaft 5 rotates, refrigerant gas is inhaled in a cylinder 8, and it is compressed by a rolling piston 9. On the other hand, oil stored in a bottom part in a hermetically sealed vessel is fed to a crankshaft hollow part 17 from an oil intake 18 of an oil filler cap 16 attached to the end of a lower bearing 7 by rotation of the crankshaft 5. In addition, oil is fed to a sliding part from a lot of lubricators 12-14 by a stirrer 10 installed in the hollow part 17. At this time, a lower end of the crankshaft 5 is covered with the oil filler cap 10, and thereby the oil is kept in calmness, without spinning, owing to the spinning flow preventing plate 19.

10. 发明专利

JPH0278780A CYLINDER SUSPENSION CONTROL MECHANISM OF MULTI-CYLINDER ROTATING COMPRESSOR 失效
公开(公告)号：JPH0278780A
公开(公告)日：1990-03-19
申请号：JP23028988
申请日：1988-09-14
申请人： MITSUBISHI ELECTRIC CORP
发明人： KAWASAKI KATSUYUKI , KOBAYAKAWA TAIICHI , SHIRAFUJI YOSHINORI , SUZUKI SATOSHI , WADA KATSUYOSHI
IPC分类号： F04C23/00 , F04B49/02 , F04C29/04
摘要： PURPOSE:To prevent the temperature increase of a compression element with a simple structure by providing such a constitution as providing a blocking means for blocking an inlet pipe by the pressure of a high pressure refrigerant solution for external refrigeration and air conditioning cycle at the time of cylinder suspension and introducing the high pressure refrigerant solution into the compression element. CONSTITUTION:A crank shaft 2 is rotated by an electric element 1 to rotate rolling pistons 5a, 5b in determined directions through eccentric parts 4a, 4b having the phases shifted at 180 deg. to each other. When a refrigerant gas to be compressed is taken in from inlet pipes 16a, 16b and compressed, the resulting compressed refrigerant gas pushes open an exhaust valve 15, through which the gas is exhausted outside of a cylinder, namely into a sealed vessel 10. In this case, a liquid refrigerant feed pipe 28 for leading the liquid refrigerant to the slider 18 lower space of a suspended cylinder control mechanism 21 at the time of cylinder suspension control and also communicating between the slider 18 lower space and the inlet chamber side of the suspended cylinder side compression element is provided. Hence, the liquid refrigerant is fed to the suspended cylinder side compression element in the cylinder suspension operation, and then evaporated with taking the heat of evaporation within the compression element, whereby the compression element is cooled.

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