公开(公告)号：JPH0674157A

公开(公告)日：1994-03-15

申请号：JP22691792

申请日：1992-08-26

Applicant: MATSUSHITA REFRIGERATION

Inventor： SAEKI YUJI ,  WADA SATOSHI ,  OZAKA MASAHIKO ,  KAWAI HIDEKI

IPC: F04B39/00

Abstract: PURPOSE:To reduce coolant gas volume leaking from a clearance in a cylinder bore by loosely-fitting a tetrafluoroethylene resin piston ring into a groove which is provided at the outer periphery of a piston freely. CONSTITUTION:A piston 20 which is made of aluminum material and reciprocates inside a cylinder bore 17a with the rotation of a crank shaft 8 through a connecting rod 9 is provided with a groove 20a equipped with two pairs of piston rings 21 made of material whose main element is tetrafluoroethylene resin on its outer periphery. The piston ring 21 is guided to the groove 20a in a clearance between the piston 20 and the cylinder bore 17a so that the piston 20 may not be brought into contact with the cylinder bore 17a during moving. Moreover, a diametrical clearance between the piston and the cylinder bore is set at 1/100-1/300 time as wide as the diameter of the piston. Therefore, it is possible to obtain stable cooling performance even when leaking loss increases due to pressure ratio increase at the time of replacing coolant CFC12, which is generally used, with HFC134a.

公开(公告)号：JPH05126062A

公开(公告)日：1993-05-21

申请号：JP28843791

申请日：1991-11-05

Applicant: MATSUSHITA REFRIGERATION

Inventor： KAWAI HIDEKI ,  AWASHIMA HIROKI ,  KAWABATA JUNTA

IPC: F04C2/356 ,  F04C15/00

Abstract: PURPOSE:To constitute each bearing in liquid lubricant to be rotated high in speed and to be long in life, and thereby make a device stable in operation by pressing each ball bearing supporting the shaft of a displacement type compression machine section into the shaft with pressure and so on so as to be housed in wherein solid individual lubricants are filled in the inside of each bearing. CONSTITUTION:The carrier allows a shaft 20 to be rotated by a motor composed of the stator 3 and the rotor 4 of a displacement type compression machine section 1. A roller 6 which is incorporated into the eccentric section 20a of the shaft 20, is then eccentrically rotated while liquid refrigerant introduced in the inside of a cylinder from a pipe 11 is being compressed, so that refrigerant is discharged out of a port 10 to a pipe 12 through the inside of a case 2. In this case, the shaft 20 is supported by both a main and an auxiliary bearing 21 and 22 housing respective ball bearings 23 and 24. The respective ball bearings 23 and 24 are filled with respective solid individual lubricants 23e and 24e. By this constitution, the existence of the solid individual lubricants 23e and 24e around respective balls results in excellent lubrication as the respective balls (not shown) in the respective ball bearings 23 and 24 are rotated.

公开(公告)号：JPH05126046A

公开(公告)日：1993-05-21

申请号：JP28844191

申请日：1991-11-05

Applicant: MATSUSHITA REFRIGERATION

Inventor： WADA SATOSHI ,  SAEKI YUJI ,  KAWAI HIDEKI ,  OZAKA MASAHIKO

IPC: F04B39/00

Abstract: PURPOSE:To enhance the durability and reliability of bearings used as well as to stabilize the efficiency and startability of a motor in order to enhance the efficiency of a hermetic type motor driven compressor used for a refrigerator and the like. CONSTITUTION:A device is made up of a crank shaft 20 fixed onto a rotor 5 acting as a motor driven element 2, an eccentric shaft 21 provided for the crank shaft 20, shaft sections 20a and 20b provided for both the sides of the eccentric shaft 21 in the axial direction, and of two ball bearings 23 and 24 rotatably supporting the crank shaft 20.

公开(公告)号：JPH04308373A

公开(公告)日：1992-10-30

申请号：JP7092391

申请日：1991-04-03

Applicant: MATSUSHITA REFRIGERATION

Inventor： WADA SATOSHI ,  KAWAI HIDEKI ,  OZAKA MASAHIKO

IPC: F04B39/00 ,  F16C19/06

Abstract: PURPOSE:To prolong the life of a ball bearing and heighten its reliability in the case of using the ball bearing regarding the high efficiency of a closed-type motor-driven compressor used for a refrigerator or the like, and facilitate assembling work performance and reduce the number of parts by applying pre-load to the ball bearing without using another means. CONSTITUTION:A closed-type motor-driven compressor is formed of a master crankshaft 20a, an auxiliary crankshaft 20b, a ball bearing 23 press-fitted to the master crankshaft 20a, a sliding bearing 24 with the auxiliary crankshaft 20b fitted thereto, and a housing 25 with which the outer wheel 23a of the ball bearing 23 is brought into contact.

公开(公告)号：JPH04255579A

公开(公告)日：1992-09-10

申请号：JP1434691

申请日：1991-02-05

Applicant: MATSUSHITA REFRIGERATION

Inventor： OZAKA MASAHIKO ,  KAWAI HIDEKI ,  WADA SATOSHI

IPC: F04B39/00 ,  F04B39/06 ,  F04B39/12 ,  F16L11/12

Abstract: PURPOSE:To provide a compressor of suppressing a temperature rise with a low noise by damping on a transmitting route the vibration which is caused by pulsation of a delivery flow and action of electrically-driven and compressed elements, and further shortening the transmitting route, in the case of a closed type compressor used in a refrigerating cycle of a freezing refrigerator or the like. CONSTITUTION:Delivery pipes 11, 21 formed of spiral tubes are provided halfway on a transmitting route of delivery gas.

公开(公告)号：JPH03258984A

公开(公告)日：1991-11-19

申请号：JP5528290

申请日：1990-03-06

Applicant: MATSUSHITA REFRIGERATION

Inventor： OZAKA MASAHIKO ,  KAWAI HIDEKI ,  NISHIHARA HIDETOSHI ,  OTA TOSHIHIKO ,  MATSUMOTO TAKESHI

IPC: F04C11/00 ,  F04C23/00

Abstract: PURPOSE:To enhance the miniaturization and reduction in noise by conforming the discharge directions to release the discharge flows from first and second compression chambers into a single muffler. CONSTITUTION:A first cylinder 31 forms a first compression chamber 29 together with a rotor 3 side housing 27 and a first intermediate plate 28, and has a first communicating hole 33 for guiding discharge flow to a muffler 32. A second cylinder 40 forms a second compression chamber together with a second intermedinate plate 34 and an anti-rotor 3 side housing 36. The discharge directions are conformed to each other to release the discharge flows from the first and second compression chambers 29, 37 into the single muffler 32. Hence, miniaturization can be enhanced while holding a sufficient muffler capacity. The pulsation component contained in the discharge flow can be smoothed to reduce noise.

公开(公告)号：JPH03237290A

公开(公告)日：1991-10-23

申请号：JP3279090

申请日：1990-02-14

Applicant: MATSUSHITA REFRIGERATION

Inventor： OZAKA MASAHIKO ,  KAWAI HIDEKI ,  NISHIHARA HIDETOSHI ,  SAEKI YUJI ,  ARIMIZU KOJI

IPC: F04C23/00 ,  F04C29/06

Abstract: PURPOSE:To reduce the pulsation of discharge flow so as to obtain a silent two-cylider rotary compressor by uniting the discharge flow from a first compression chamber and that from a second compression chamber in a muffler with approximately half cycle phase delay. CONSTITUTION:A crankshaft 22 is provided with a first and a second eccentric shafts 23, 24, and a first cylinder 31 forms a first compression chamber 29 together with a rotor side housing 27 and a first middle plate 28. The first middle plate 28 is provided with a first discharge opening 31 for the passing of discharge flow from the first compression chamber 29 as well as with a first communicating hole 33for leading discharge flow to a muffler 32. A second cylinder 40 forms a second compression chamber 37 together with a second middle plate 34 and a non-rotor side housing 36, and is provided with a second communicating hole 35 for communicating the first communicating hole 33 with a release hole 39. The eccentric direction phase difference of the first and second eccentric shafts 23, 24 of the crankshaft 22 is determined in such a way that the discharge flow from the first compression chamber 29 and that from the second compression chamber 37 are united in the muffler 32, being dislocated by approximately half phase in relation to the rotational cycle of the crankshaft 22.

公开(公告)号：JPH03102148A

公开(公告)日：1991-04-26

申请号：JP23854989

申请日：1989-09-14

Applicant: MATSUSHITA REFRIGERATION

Inventor： ASADA MASAHARU ,  IGUCHI HIDEKI ,  KAWAI HIDEKI ,  NISHIHARA HIDETOSHI

IPC: F16K17/06 ,  F25B41/04

Abstract: PURPOSE:To make a substantial improvement over an assembly work by a method wherein a high pressure valve part is constructed with a main body and a seat fixed through a caulking of roll, a low pressure value fixed by the main body and the roll caulking is provided and the other end of the main body forms a low pressure refrigerant inlet pipe with a reduced diameter pipe. CONSTITUTION:One end of a cylindrical main body 34 is formed with a high pressure valve seat 39. A seat H36 provided with a high pressure refrigerant inlet and an outlet pipe is connected to one end. The main body has a leaf valve H for opening or closing a high pressure valve seat 39 of the seat H36 with a pressure of refrigerant, a spring 41 for biasing a leaf valve H40 against the high pressure valve seat 39 and its guide 45 and a seat M42 provided with an O-ring 43 at its end part, having a pipe through-hole 42a at its central part fixed by the main body 34 and the roll caulking part 44. The main body 34 of which position is set is inserted by an inner circumferential projection 47 of the stopper 46 and a low pressure valve 33 fixed by a roll caulking part 44 are provided. The other end of the main body 34 forms a low pressure refrig erant inlet pipe 51 with a reduced diameter pipe, thereby an assemblying work can be substantially improved and its reliability in operation can be improved.

公开(公告)号：JPH0378582A

公开(公告)日：1991-04-03

申请号：JP21330489

申请日：1989-08-18

Applicant: MATSUSHITA REFRIGERATION

Inventor： SASANO HIROSHI ,  KAWAI HIDEKI ,  HAMADA KOJI

IPC: F04B39/00 ,  F04B39/12

Abstract: PURPOSE:To obtain life reliability improvable with a load reduced in ball bearings by arranging the one ball bearing in an electric motor element side and the other opposite to the electric motor element side from an eccentric part of a crankshaft, of the two ball bearings for rotatably supporting the crankshaft. CONSTITUTION:A ball bearing 28 is inserted to a crankshaft 25 to which a thrust plate 34 is fixed by a bolt 35. Thus by arranging bearings 27 and 28 in an electric motor element side and in a side opposite thereto from an eccentric part 26 of the crankshaft 25, in a compressor, a load by reaction of a compression load of a piston 14 is almost equally received by the bearings 27 and 28. Accordingly, a load for the bearings 27 and 28 can be reduced with life reliability possible to be enhanced. While when a spring 32 is inserted between an outer frame part 31 of the bearing 28 and its bearing part 30, a thrust load of the spring 32 + dead weight force of the crankshaft 25 and a rotor 4 acts on the bearing 27 with the thrust load of the spring 32 acting on the bearing 28, and a sliding noise can be low suppressed.

公开(公告)号：JPH037866A

公开(公告)日：1991-01-16

申请号：JP14175589

申请日：1989-06-02

Applicant: MATSUSHITA REFRIGERATION

Inventor： NISHIHARA HIDETOSHI ,  KAWAI HIDEKI ,  IGUCHI HIDEKI

IPC: F16K17/04 ,  F25B41/04

Abstract: PURPOSE:To provide a low cost and high-reliable fluid control valve by a method wherein at least the end surface on the third valve seat body side of a first leaf valve is lined with rubber. CONSTITUTION:First and second valve devices 6 and 7 located in high and low pressure circuits A and B of a fluid control valve 1 are formed in a cylindrical body 8, and vertically partitioned by means of a third valve device 9. During running of a rotary compressor 2, a first leaf valve 13 is attracted to a third valve seat body 22, and an inlet 10 and an outlet 11 of the valve device 6 are intercommunicated. A high pressure refrigerant continuously flows from a condenser 3 to a capillary tube 4, a leaf valve 17 of the valve device 7 is opened by means of a force of gas flowing from an inlet 16 to an outlet 18, and a low pressure refrigerant continuously flows from a vaporizer 5 to the rotary compressor 2 to perform freezing operation. In this case, even when refuse is circulated togetherwith a refrigerant and is lodged between a valve seat body 22 and the leaf valve 13, fine refuse is attracted through resilient deformation of a rubber coating layer 23, and sealing ability of the valve device is ensured.