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21. 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.

22. 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.

23. 发明专利

JPH01294987A MULTI-CYLINDER TYPE ROTARY COMPRESSOR 失效
公开(公告)号：JPH01294987A
公开(公告)日：1989-11-28
申请号：JP12541088
申请日：1988-05-23
申请人： MITSUBISHI ELECTRIC CORP
发明人： SHIRAFUJI YOSHINORI , KAWASAKI KATSUYUKI , KOBAYAKAWA TAIICHI , SUZUKI SATOSHI
IPC分类号： F04C23/00 , F04C29/00 , F04C29/12
摘要： PURPOSE:To eliminate a delay in operation of a slider in a rest cylinder control mechanism by discharging gas and oil between the slider and a housing through a gas vent hole formed in the slider in association with ascent of the slider. CONSTITUTION:Upon rest cylinder control operation, a shut-off valve 19 is closed to block a gas vent pipe 21 while a shut-off valve 16 is opened to feed high pressure gas into a space in the lower section of a slider 13 so as to allow the slider to ascent in order to block a suction pipe 12b. IN this phase, gas and oil in a space 23 between a housing 15 and a flange part 22 of the slider 13 is relieved into the upper end part of the slider 13 through a gas vent hole 25. Accordingly, it is possible to eliminate such a problem that the pressure of the space 23 becomes excessive, so as to prevent the downward motion of the slider from delaying. Further, the gas vent hole 25 is located above the upper end surface of the flange part 22 so that the vent hole may be closed just before the upper and surface of the flange part 22 being made into press- contact with the housing 15, thereby it is possible to prevent a bump between the members 15, 22.

24. 发明专利

JPH01187393A CLOSED TYPE ROTARY COMPRESSOR 失效
公开(公告)号：JPH01187393A
公开(公告)日：1989-07-26
申请号：JP1141188
申请日：1988-01-21
申请人： MITSUBISHI ELECTRIC CORP
发明人： SUZUKI SATOSHI , KAWASAKI KATSUYUKI , KOBAYAKAWA TAIICHI , SHIRAFUJI YOSHINORI
IPC分类号： F04C29/00 , F04C23/00
摘要： PURPOSE:To prevent a lead from touching a rotor serving as an electrically driven element by keeping the lead, which connects a stator serving as the electrically driven element to a hermetic terminal that is fixed on the upper end surface of a closed case, in a fall prevention device provided on the stator. CONSTITUTION:An electrically driven element 2 is provided in an upper part inside a cylinder-shaped closed case 1 whose both ends are blocked, and a compressive element 3 which is driven by the electrically driven element 2 is provided in a lower part inside the closed case 1 respectively. When the rotor 5 of the electrically driven element 2 rotates, the rolling piston 8 serving as the compressive element 3 rotates in a cylinder chamber 9 so that cooling medium is compressed. In this structure, the root part of a lead 14, which connects the stator 4 of the electrically driven element 2 to a hermetic terminal 13 fixed on the upper end part of the closed case 1, is engaged with the cylinder- shaped part 15a of a fall prevention device 15. And the leg part 15b of the fall prevention device 15 is fixed on the upper end part of the stator 4. Thereby, the lead 14 is prevented from touching the rotor 5.

25. 发明专利

JPS6480790A TWO-CYLINDER ROTARY COMPRESSOR 失效
公开(公告)号：JPS6480790A
公开(公告)日：1989-03-27
申请号：JP23673287
申请日：1987-09-21
申请人： MITSUBISHI ELECTRIC CORP
发明人： SAKAINO YOSHIKI , KAWASAKI KATSUYUKI , SHIRAFUJI YOSHINORI , SUZUKI SATOSHI , OGAWA HIROSHI
IPC分类号： F04C18/356 , F04C23/00
摘要： PURPOSE:To idly run the piston of one compression element in a cylinder by holding one vane of the first and second compression elements at the retreat position via the coupling with a sliding piece at the time of cylinder rest control. CONSTITUTION:A two-cylinder rotary compressor is provided with the first coupling piece 26a on a vane 26 provided on one of the first and second compression elements 3, 4 and a groove 20 nearly perpendicular to the shift direction of the vane 26 and having guide holes 30, 31 guiding a low-pressure fluid and a high-pressure fluid respectively on the cylinder 12 of this compression element 4. It is provided with the second coupling piece 36a stored in this groove 29 and facing the first coupling piece 26a and a sliding piece 36 moved in the groove 29 by the introduction of the low-pressure fluid and high-pressure fluid at the time of cylinder rest control and coupling the second coupling piece 36a with the first coupling piece 26 to hold the vane 26 at the retreat position.

26. 发明专利

JPS63253192A MULTI CYLINDER ROTARY TYPE COMPRESSOR 失效
公开(公告)号：JPS63253192A
公开(公告)日：1988-10-20
申请号：JP8510387
申请日：1987-04-07
申请人： MITSUBISHI ELECTRIC CORP
发明人： SAKAINO YOSHIKI , KAWASAKI KATSUYUKI , SHIRAFUJI YOSHINORI , SUZUKI SATOSHI , OGAWA HIROSHI
IPC分类号： F04C28/10 , F04C28/02 , F04C28/12 , F04C29/02
摘要： PURPOSE:To ensure oil supplied to the point end part of a vane, by connecting the downstream side part of a suction pipe, which connects a cylinder pause control mechanism to a cylinder, to communicate with the bottom part of an enclosed vessel through an opening and closing valve. CONSTITUTION:An opening and closing valve 26 connects its one end to the bottom part of an enclosed vessel 10 by a pipe 27 and the other end to a suction pie downstream side part 16b1, which connects a housing 20 of a cylinder pause control mechanism 25 to the bottom side cylinder 7b, by a capillary tube 28. Opening the opening and closing valve 26 in cylinder pause operation, one part of oil 24, passing through the capillary tube 28, is sucked changing into a mist state to the suction pipe downstream side part 16b1 and to the cylinder 7b, and a compressor cools the point end part of a vane supplying the oil to that part, thus suppressing wearing in this point end part.

27. 发明专利

JPS63253191A MULTI CYLINDER ROTARY TYPE COMPRESSOR 失效
公开(公告)号：JPS63253191A
公开(公告)日：1988-10-20
申请号：JP8510287
申请日：1987-04-07
申请人： MITSUBISHI ELECTRIC CORP
发明人： KAWASAKI KATSUYUKI , SAKAINO YOSHIKI , SHIRAFUJI YOSHINORI , SUZUKI SATOSHI , OGAWA HIROSHI
IPC分类号： F04C28/10 , F04C28/02 , F04C28/12
摘要： PURPOSE:To enhance compression efficiency, by protruding a flange in the peripheral surface of a slider in a cylinder pause mechanism and forcing the flange to be brought into press contact with a stepped part provided in the internal peripheral surface of a housing when a cylinder pause control is performed. CONSTITUTION:When a slider 18 is lifted by high pressure gas allowed to flow into space in the bottom of the slider 18 in a housing 20 of a cylinder pause control mechanism 21 when it performs a cylinder pause control, the upper end surface of a flange 18a is forced to come into press contact from the bottom with a stepped part 20a of the housing 20. The slider 18 provides a clearance between its upper end surface and the upper end surface of a small contour part 20b of the housing 20. High pressure gas, giving a back pressure to the slider 18, generates no leakage to a suction pipe 16b surely cutting off the communication with the side of a cylinder 7b. Accordingly, consumption power can be reduced.

28. 发明专利

JPH11201567A REFRIGERATOR 失效
公开(公告)号：JPH11201567A
公开(公告)日：1999-07-30
申请号：JP445698
申请日：1998-01-13
申请人： MITSUBISHI ELECTRIC CORP
发明人： SASAKI TAKASHI , SUMIDA YOSHIHIRO , YAMAGUCHI TOSHIAKI , MATSUNAGA NORIAKI , KAWASAKI KATSUYUKI , SUGIMOTO TAKESHI , MORIMOTO HIROYUKI
IPC分类号： F25B1/00
摘要： PROBLEM TO BE SOLVED: To surely return a refrigerating machine oil discharged from a compressor to the compressor by setting the content of refrigerating machine oil circulating in a refrigerant circuit to be lower than the solubility of refrigerating machine oil to a liquid refrigerant in a refrigerator using a refrigerating machine oil whose mutual solubility is very low to the refrigerant. SOLUTION: This refrigerator is provided with a refrigerant circuit consisting of a compressor 1, a condenser 3, a pressure reducing device 5, and an evaporator 7 in a closed-circuit piping, and a refrigerant, especially not specified, is an R404A, etc., which is a mixture of R143a, R125 and R134a. A refrigerant machine oil uses such an oil that has a low mutual solubility to the R404A and of which specific gravity is smaller than a liquid refrigerant. The content of refrigerant machine oil circulating in the refrigerant circuit is set to be lower than the solubility of refrigerating machine oil to the liquid refrigerant. Thus, the refrigerating machine oil entering the refrigerant circuit is fluidized together with the refrigerant, thereby returning the refrigerating machine oil to the compressure surely and preventing the detention thereof within the refrigerant circuit.

29. 发明专利

JPH05149634A AIR-CONDITIONING DEVICE 失效
公开(公告)号：JPH05149634A
公开(公告)日：1993-06-15
申请号：JP10728092
申请日：1992-04-27
申请人： MITSUBISHI ELECTRIC CORP
发明人： TANABE YOSHIHIRO , IMASHIRO YASUO , AOKI KATSUYUKI , TANAKA TOSHIHIRO , SUZUKI JINICHI , NAGATOMO HIDEAKI , KUBO SEIJI , KAWASAKI KATSUYUKI
IPC分类号： F25B1/10
摘要： PURPOSE:To perform cooling and heating operation wherein efficiency is improved, the generation of noise is reduced, the generation of vibration is reduced, and reliability is improved by a method wherein switching between two-cylinder parallel operation and two-cylinder series operation can take place, in an air-conditioning device having a compressor for driving an inverter having two compression chambers. CONSTITUTION:In high capacity heating operation, the delivery port of a first compression chamber 3 is connected to a first bypass pipe 19 through a three-way valve 18, and a first solenoid valve 23 is opened and a second solenoid valve 24 is closed. Two-cylinder parallel operation wherein a delivery refrigerant in the first compression chamber 3 is guided to a compressor container 1a through a first bypass pipe 19, only a refrigerant from which lubricating oil is separated is delivered through a main delivery port 8 and a refrigerant delivered from a second compression chamber 4 is delivered through the main delivery port 8, and a refrigerant sucked through a second bypass pipe 22 and delivered from a second compression chamber 4 is delivered through the main deliver port 8 is carried out. Meanwhile, two-cylinder series operation wherein, in low capacity heating operation, a refrigerant compressed in the first compression chamber 3 is guided to the suction port 7 of the second compression chamber 4 togetherwith a refrigerant from a gas liquid separator 25, and the refrigerant compressed in the second compression chamber is delivered through the main delivery port 8 is carried out.

30. 发明专利

JPH03222884A ROTARY COMPRESSOR 失效
公开(公告)号：JPH03222884A
公开(公告)日：1991-10-01
申请号：JP1814690
申请日：1990-01-29
申请人： MITSUBISHI ELECTRIC CORP
发明人： WADA KATSUYOSHI , NAKANE KAZUHIRO , KAWASAKI KATSUYUKI
IPC分类号： F04C18/356
摘要： PURPOSE:To increase a discharge passage sectional area without any restriction to cylinder thickness by installing plural pieces of discharge vertical holes for coolant gas, housing a discharge valve and its supporting device in an adjoining state in the circumferential direction of a cylinder, and adjacently setting up each discharge port corresponding to each of these vertical hole in the circumferential direction. CONSTITUTION:Two discharge vertical holes 13 for coolant gas are installed in an adjoining state in the circumferential direction of a cylinder 9, and a discharge valve 11 and its supporting device 12 are housed each in the inner part. In addition, each discharge port 10 is also set up vertically in the circumferential direction in response to each discharge vertical hole 13. Therefore, the number of the discharge port 10 can be increased without any restriction to the axial thick size of the cylinder 9, and even at time of high discharge rate at high speed operation, a discharge passage sectional area is sufficiently secured so that a discharge pressure loss is reducible.

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