公开(公告)号：JPH06129382A

公开(公告)日：1994-05-10

申请号：JP27406492

申请日：1992-10-13

Applicant: MATSUSHITA REFRIGERATION

Inventor： OGAWARA HIDEJI

IPC: F04C29/12 ,  F04C28/26 ,  F04C29/00 ,  F04C29/10

Abstract: PURPOSE:To reduce the discharge loss and vibrations and enhance the operating efficiency of a compressor by sensing the pressure in a compression chamber to serve for controlling the current fed to a solenoid, and therewith performing opening and closing of a discharge valve. CONSTITUTION:The refrigerant gas sucked from a suction pipe 13 is sucked into the suction chamber of a cylinder 40 from a suction path and forwarded to the compression chamber to be compressed there. A pressure sensors 41a, 41b sense the pressures in the compression chamber and a sealed vessel 42, respectively, and a control part 39a compares the outputs of these two sensors to determine the differential pressure between the pressure in the compression chamber and the one in the vessel 42 and also compares the obtained differential pressure with the set value dependent upon the operating condition. If the difference from the set value is below a certain level, current is fed to a solenoid 35 in the direction of opening a discharge valve 32. This permits reducing the over-compression loss, discharge loss, vibration, and the input in starting and presenting an enhanced operating efficiency.

公开(公告)号：JPH0674640A

公开(公告)日：1994-03-18

申请号：JP22692892

申请日：1992-08-26

Applicant: MATSUSHITA REFRIGERATION

Inventor： HAMAOKA KOJI ,  SHIBUYA HIROMI ,  OGAWARA HIDEJI

IPC: F25B1/00 ,  F25B49/02 ,  F25D19/00 ,  F25D29/00

Abstract: PURPOSE:To provide a suitable cooling method for a power circuit block having an electrical power converting part for controlling a capability of a compressor for a refrigerator, in particular having a high heat generating power, restrict an increase in temperature of a power element, improve reliability in operation, make a unit small-sized and attain low cost. CONSTITUTION:There assures a sucked air passage 20 for a cooling fan 12 for a compressor for use in cooling the compressor 11. A heat sink 16 and a power circuit block 14 are arranged within the sucked air passage 20. With such an arrangement, a proper cooling is carried out, an increasing in temperature of the power circuit block 14 is restricted and a reliability in operation of the power element is remarkably improved.

公开(公告)号：JPH0674175A

公开(公告)日：1994-03-15

申请号：JP22692592

申请日：1992-08-26

Applicant: MATSUSHITA REFRIGERATION

Inventor： OGAWARA HIDEJI

IPC: F04C29/12 ,  F04C29/00 ,  F04C29/06

Abstract: PURPOSE:To reduce delivery loss and vibration of a delivery valve mechanism and enhance the operating efficiency of a compressor. CONSTITUTION:A delivery valve mechanism of a rotary compressor is composed of a delivery hole 15 with valve seat, a delivery valve 26 consisting of a valve body 26a to open and close the delivery hole and a pivot shaft 26b one end of which is fixed to the valve body, a spring which presses the delivery valve 26 against the valve seat 19 of the delivery hole 15, a sealed container 27 in which a part of the pivot shaft 26b is stored slidably and airtightly and which is fixed to a compression element with a small space 28 at the rear of the pivot shaft, and a communication pipe 31 which communicates the suction side of a compressor with the small space 28 of the airtight container 27.

公开(公告)号：JPH04179889A

公开(公告)日：1992-06-26

申请号：JP30987390

申请日：1990-11-14

Applicant: MATSUSHITA REFRIGERATION

Inventor： OGAWARA HIDEJI

IPC: F04C18/356

Abstract: PURPOSE:To obtain a rotary compressor having a simple structure, the least sliding loss and a high reliability by arranging grooves on a plane facing a vane groove of a vane so as to be in parallel with the moving direction of the vane, and arranging a projection part to engage with the vane groove on the plane facing the vane of the vane groove. CONSTITUTION:A vane 20 has grooves 20c and 20d arranged on a plane facing a vane groove 21a of a cylinder 21 in the central part so as to be in parallel with the moving direction of the vane 20. Further, the vane groove 21a has projection parts 21b and 21c to engage respectively with the grooves 20c and 20d arranged in the vane 20 on a plane facing the vane 20. Since a pressure receiving area becomes small to that extent which the central part of the vane 20 becomes narrow in width because of the grooves 20c and 20d and a backing pressure load applied to the back surface of the vane becomes small, a contact load of a roller 8 and the vane 20 becomes small so that sliding loss can be reduced, and furthermore, abrasion loss at the tip of the vane 20 and the outer periphery of the roller 8 can be reduced so that reliability can be improved. Further, leakage from a compression chamber to an inhalation chamber at edge parts 20a and 20b of the vane 20 never increases.

公开(公告)号：JPH0494495A

公开(公告)日：1992-03-26

申请号：JP21235890

申请日：1990-08-09

Applicant: MATSUSHITA REFRIGERATION

Inventor： OGAWARA HIDEJI ,  YOSHIMURA TAKAO ,  MORITA ICHIRO

IPC: F04C28/00 ,  F04C28/18

Abstract: PURPOSE:To make a variable change of power at a low cost by providing a control chamber opened to a compression chamber, movable wall slidably fitted into the control chamber, spring provided in a rear end of the movable wall and a back pressure control pipe connected to the control chamber. CONSTITUTION:A rotary compressor is provided with a control chamber 22 opened to a compression chamber 21b, movable wall 23 slidably fitted into the control chamber 22, spring 24 installed in a rear end of the movable wall 23 and a back pressure control pipe 25 connected to the control chamber 22. In this way, a position of the movable wall 23 at compression time is determined by tension of the spring 24 and a back pressure from the back pressure control pipe 25, and reexpansion volume, generated by moving the movable wall 23, can be controlled. Accordingly, power of the compressor can be variably changed at a low cost.

公开(公告)号：JPH0447187A

公开(公告)日：1992-02-17

申请号：JP15370190

申请日：1990-06-12

Applicant: MATSUSHITA REFRIGERATION

Inventor： MORITA ICHIRO ,  YOSHIMURA TAKAO ,  OGAWARA HIDEJI

IPC: F04C18/356

Abstract: PURPOSE:To confine gaps between both side faces of a vane and two pressing plates uniformly to a minimum regardless of assembling distortion and machining accuracy so as to reduce leakage loss and improve volume efficiency by providing springs or the like disposed in recessed parts to energize the pressing plates toward the end faces of the vane. CONSTITUTION:A vane 19 enclosed in the vane groove of a cylinder performs reciprocating motion during the operation of a compressor, in the state of the respective end faces 19a, 19b thereof being held between pressing plates 26a, 26b energized by springs 27a-27d. At this time, the vane 19 is lubricated being soaked into lubricating oil stored in a closed casing. When the spring force of the respective springs 27a-27d for energizing the respective pressing plates 26a, 26b is the same, the vane 19 is held in such a way that the respective gaps deltaa, deltab between the respective end faces 19a, 19b of the vane 19 and the respective pressing plates 26a, 26b become deltaa=deltab. That is, the pressing plates 26a, 26b move in such a way as to make the respective gaps deltaa, deltab approximate ly constant regardless of assembling distortion and machining accuracy, so that the respective gaps deltaa, deltab can be confined to a minimum.

公开(公告)号：JPH03267595A

公开(公告)日：1991-11-28

申请号：JP6887190

申请日：1990-03-19

Applicant: MATSUSHITA REFRIGERATION

Inventor： YOSHIMURA TAKAO ,  MORITA ICHIRO ,  OGAWARA HIDEJI

IPC: F04C29/02

Abstract: PURPOSE:To improve lubricating performance by providing two oil supply mechanisms whose one ends communicate to an oil passage provided at either one on a main bearing, an auxiliary bearing or a shaft and the other ends communicate into a lubricating oil, and an oil drain passage whose one end communicates to the oil passage and the other end communicates to a refrigerant gas space. CONSTITUTION:A main bearing 20 having a rolling bearing 20a fixed to a cylinder 19 and an auxiliary bearing 21 having a rolling bearing 21a are provided so as to support a shaft 3. An oil supply mechanism 23 comprising the cylinder 19, a back surface of a vane 6, the main bearing 20 and the auxiliary bearing 21 is formed with an oil supply mechanism 12. One ends of the oil supply mechanisms 12 and 23 communicate to an oil passage 13a and the other ends communicate to a lubricating oil 18. In the oil passage 13a, an oil drain passage 27 whose one end communicates to the oil passage and the other end to a refrigerant gas space in a casing 1 is provided. By this constitution, the neighborhood of the rolling bearings are filled with the lubricating oil, whereby improves sealing performance and eliminates reverse flow of refrigerant gas. Thus, lubricating performance and reliability are improved.

公开(公告)号：JPH02248686A

公开(公告)日：1990-10-04

申请号：JP7092089

申请日：1989-03-23

Applicant: MATSUSHITA REFRIGERATION

Inventor： OGAWARA HIDEJI ,  YOSHIMURA TAKAO ,  MORITA ICHIRO

IPC: F04C29/12 ,  F04C28/06 ,  F04C29/00

Abstract: PURPOSE:To reduce the slide loss and improve the volumetric efficiency and the ability by providing a sealed back pressure chamber in the rear end of a vane, and communicating the back pressure chamber with a suction hole to be under the low pressure, and providing a nonreturn valve in a suction passage communicating with the suction hole or the back pressure chamber. CONSTITUTION:A back pressure chamber 19 is surrounded by a cylinder 20, a vane 21, a main bearing 22 and an auxiliary bearing 23. A suction passage 24 is communicated with a suction hole 25 and comprises a nonreturn valve. The suction hole 25 is communicated with an inner compression chamber 27 of the cylinder 20 and the back pressure chamber 19. During a roller 5 moves from a compression starting point B to a bottom dead point C, The refrigerant gas is sucked from the suction passage 24 to the compression chamber 27 through the suction hole 25 and while is stayed in the back pressure chamber 19. Next, when the roller 5 moves from the bottom dead point C to the compression starting point B through a top dead point A, the pressure in the back pressure chamber 19 is raised by a pump action of the vane 21 to close the nonreturn valve 26 of the suction passage 24. Then, the compressed refrigerant is fed to the compression chamber 27 through the suction hole 26.

公开(公告)号：JPH02215986A

公开(公告)日：1990-08-28

申请号：JP3305089

申请日：1989-02-13

Applicant: MATSUSHITA REFRIGERATION

Inventor： OGAWARA HIDEJI ,  YOSHIMURA TAKAO ,  MORITA ICHIRO

IPC: F04C18/356

Abstract: PURPOSE:To lessen a sliding loss as well as to making improvements in efficiency by setting up each roller bearing in the vicinity of an inner circumferential surface of a cylinder at the low pressure chamber side and also that at the side of an outer circumferential surface of the cylinder at the high pressure chamber side, respectively, at the wall of a vane groove part. CONSTITUTION:With compressive action, reaction forces F4, F5 act at a contact point between a vane 6 and a vane groove part 19a of a cylinder 19. Since a roller 21a in a roller bearing 22 rotates with reciprocating slide motion of the vane 6, a friction factor is lowered as compared with each slip sliding motion of metals themselves. Consequently, frictional force being produced in the vane groove part 19a so far caused for a sliding loss is reducible, so that such a compressor that is less in the sliding loss and excellent in efficiency can be thus secured.

公开(公告)号：JPH02163490A

公开(公告)日：1990-06-22

申请号：JP31911288

申请日：1988-12-16

Applicant: MATSUSHITA REFRIGERATION

Inventor： MORITA ICHIRO ,  YOSHIMURA TAKAO ,  OGAWARA HIDEJI

IPC: F04C18/356

Abstract: PURPOSE:To make improvements in sealability and lubricity between a vane and a cylinder by feeding a back pressure chamber installed at an upper side of the vane with lubricating oil in a closed casing, where a refrigerant is partially penetrated in, by dint of intermediate pressure for lubrication between the vane and the cylinder. CONSTITUTION:A vane 6 contacts with a roller 5 and reciprocates as partitioning off an inlet chamber 11a and a compression space 11b. A back pressure chamber 13a is installed at an upper side of the vane 6. Lubricating oil 18 in a closed casing 1, where a refrigerant is partially penetrated in, is fed to this back pressure chamber so as to cause the inside of the back pressure chamber 13a to become intermediate pressure, via an intermediate pressure mechanism, for example, a capillary tube 19. With this, abatements of contact load between the vane 6 and the roller 5 and any sliding loss are securable. In addition, even if decompression at time of the lubricating oil 18 flowing into the back pressure chamber 13a occurs and the refrigerant is vaporized in the back pressure chamber 13a by stirring through the vane 6, lubrication for a clearance between the vane 6 and a cylinder 4 is performed by the lubricating oil 18 collected in a bottom part of the back pressure chamber 13a with its own weight. Therefore sealability and lubricity are thus improved.