公开(公告)号：JP2001165042A

公开(公告)日：2001-06-19

申请号：JP35131299

申请日：1999-12-10

Applicant: MATSUSHITA REFRIGERATION

Inventor： HAYASHI AKIRA ,  MORITA ICHIRO ,  KAWABATA JUNTA ,  INAGAKI KO ,  ISHIDA TAKANORI ,  KATAYAMA MAKOTO

IPC: F04B35/04

Abstract: PROBLEM TO BE SOLVED: To prevent deterioration of efficiency and reliability of a compressor, by preventing local entanglement with a cylinder even in the case a piston is tilted in a diametric direction due to insufficiency of work accuracy and assembly accuracy of a cylinder, piston, and an elastic element, relating to a vibration type compressor. SOLUTION: Rigidity in a side end part of a compression chamber 12 of a cylinder 13 is decreased, elastic deformation can be made in a diametric direction, so that local entanglement between a piston and the cylinder can be prevented.

公开(公告)号：JP2001132636A

公开(公告)日：2001-05-18

申请号：JP31923799

申请日：1999-11-10

Applicant: MATSUSHITA REFRIGERATION

Inventor： KATAYAMA MAKOTO ,  MORITA ICHIRO ,  KAWABATA JUNTA ,  ISHIDA TAKANORI ,  INAGAKI KO ,  HAYASHI AKIRA

IPC: F04B35/04

Abstract: PROBLEM TO BE SOLVED: To prevent lowering of reliability such as stoppage of compressor as abrased powder of a sliding part bites in the sliding part, etc. on the oscillating type compressor to be used for a refrigerating cycle, etc. SOLUTION: It is possible to discharge abrased powder collected in a recessed part 14a in a closed casing 1 at the time of suction by high pressure gas introduced at the time of compression, to prevent accumulation of abrased powder in a sliding part and to prevent lowering of reliability such as stoppage of a compressor as the recessed part 14a provided on the sliding part of a piston 14 is communicated to a high pressure chamber 7b of a cylinder head 7 at the time of compression and it is communicated to the inside (low pressure) of the closed casing 1 at the time of suction.

公开(公告)号：JP2001107864A

公开(公告)日：2001-04-17

申请号：JP28651399

申请日：1999-10-07

Applicant: MATSUSHITA REFRIGERATION

Inventor： YAGI AKIO ,  KITA ICHIRO ,  UMEOKA IKUTOMO ,  KAWABATA JUNTA ,  SUGIMOTO SHUHEI ,  KANESHIRO KENJI

IPC: F04B39/02 ,  F04B39/00

Abstract: PROBLEM TO BE SOLVED: To improve efficiency of energy in a hermetic compressor. SOLUTION: This hermetic compressor comprises an oil channel 19 communicated with the upper part of a crankshaft 10 from the lower end thereof, the oil exhaust port 19a of the oil channel 19 which is opened in the upper part of the crankshaft 10, and an intake muffle 20 which is arranged beside a cylinder 7 and has a top surface 20a downwardly inclined in the direction of the crankshaft 10. When oil 13 which is exhausted from the oil exhaust port 19a splashes on the inclined part of the top surface of the intake muffler 20, the oil 13 splashes slantly upward to that an amount of oil 13 stuck to the surface of the intake muffler 20 can be reduced. The intake muffler 20 can be prevented from being heated, refrigerant gas can be prevented from being heated in the inside of the intake muffler 20, and the refrigerant gas can be supplied with a high density to the inside of the cylinder 7 so that efficiency can be improved. The oil 13 dispersed from the intake muffler 20 is cooled in a hermetic container 1, and high temperature oil 13 is supplied to a sliding part so that reliability can be improved.

公开(公告)号：JP2001107862A

公开(公告)日：2001-04-17

申请号：JP28651899

申请日：1999-10-07

Applicant: MATSUSHITA REFRIGERATION

Inventor： UMEOKA IKUTOMO ,  KITA ICHIRO ,  KAWABATA JUNTA ,  YAGI AKIO ,  SUGIMOTO SHUHEI ,  KANESHIRO KENJI

IPC: F04B39/02

Abstract: PROBLEM TO BE SOLVED: To improve reliability at high efficiency in a hermetic motor-driven compressor used for a domestic refrigerator by reducing the sliding loss of a baring part and promoting cooling thereof. SOLUTION: A compressive element 3 and an electric element 2 are stored in a hermetic case 1. This compressor comprises a crank 9 fixed on the rotor 5 of the electric element 2, a bearing 8 in which a low frictional sliding material-made sleeve 18 equipped with an expanding slot 17 is press-fitted and by which the crank 9 is pivoted, a bearing oil groove 19 whose upper and lower ends are communicated with the inner circumferential surface of the bearing 8, and lubricant oil 13 reserved in a bottom part in the sealed case 1. A coefficient of friction is lowered by the low frictional sliding member so that the sliding loss of the crank 9 is reduced, and also the lubricant oil 13 is led to flow into the bearing oil groove 19 so that the cooling of the bearing 8 is promoted, and the reliability of the compressor can be improved at high efficiency.

公开(公告)号：JP2001107860A

公开(公告)日：2001-04-17

申请号：JP28651599

申请日：1999-10-07

Applicant: MATSUSHITA REFRIGERATION

Inventor： ISHIDA TAKANORI ,  KAWABATA JUNTA

IPC: F04B39/00 ,  F04B53/00 ,  F04B53/14 ,  F16C33/24

Abstract: PROBLEM TO BE SOLVED: To provide a sliding member such as a high reliable compressor and pump in which the friction of a sliding part is lowered even when oil supply is few or under an oil-free condition and wear and abrasion resistance is improved. SOLUTION: In this sliding member in which a diamond-like carbon(DLC) film is formed on a base material through a substrate layer, a solid lubrication film is formed in a manner that the substrate layer comprises a plurality of compound layers having different composition consisting of carbon, nitrogen and transition metal, layers are so laminated that hardness is sequentially lowered from the uppermost layer consisting of the DLC film to the base material, and the whole film thickness is set to 0.5-5.0 μm. Low coefficient of friction, self lubricity and wear and abrasion resistance that the DLC film has originally can be sufficiently exhibited, and the reliability and efficiency of the compressor and pump can be improved.

公开(公告)号：JPH1047277A

公开(公告)日：1998-02-17

申请号：JP20159096

申请日：1996-07-31

Applicant: MATSUSHITA REFRIGERATION

Inventor： KAWABATA JUNTA ,  KAWASHIMA TAKAO

IPC: F04C29/00 ,  F04B39/00 ,  F04C18/356

Abstract: PROBLEM TO BE SOLVED: To provide a highly reliable rotary compressor which is excellent in abrasion resistance by forming one of a slidingly movable material in a compressing mechanism out of cast iron, an iron type sintered material or the like, and forming the other of an iron type material which is composed of chromium and nitrogen formed by a PVD method and has a compound layer having the specific chromium content on a surface. SOLUTION: A rotary compressor used in a refrigerating cycle or the like, houses a compressing mechanism composed of a cylinder, a roller, a crank, a vane or the like in a sealed casing. In this case, the cylinder being one of a slidingly movable member is made of cast iron, and the other vane is formed of an iron type metallic material having on a surface a compound layer 21 mainly composed of chromium and nitrogen formed by a PVD method. The compound layer 21 is manufactured so that the content of chromium becomes 50wt.% to 60wt.% and its surface hardness becomes 1000Hv or more. Preferably, the compound layer 21 is formed after a nitriding layer 24 containing nitrogen not less than 3wt.% up to a depth not less than 20μm from a surface is formed in an iron type material 22.

公开(公告)号：JPH09112464A

公开(公告)日：1997-05-02

申请号：JP27268595

申请日：1995-10-20

Applicant: MATSUSHITA REFRIGERATION

Inventor： KAWABATA JUNTA

IPC: F04C18/356

Abstract: PROBLEM TO BE SOLVED: To make improvements in wear resistance and to enhance reliability by applying surface treatment to the sliding material of a rotary compressor using a refrigerating cycle or the like. SOLUTION: One side of sliding materials consists of cast iron and sintered ferrous material or aluminum compound material, and the other side is of a compound layer of chrome (Cr) and nitrogen (N) formed by a PVD process, and owing to a ferrous material 22 having this compound layer whose growth grain 21 is of spherical form, high reliability excellent in wear resistance is securable.

公开(公告)号：JPH07247981A

公开(公告)日：1995-09-26

申请号：JP4126394

申请日：1994-03-11

Applicant: MATSUSHITA REFRIGERATION

Inventor： KAWABATA JUNTA

IPC: F04C29/02 ,  F04C18/356 ,  F04C28/28

Abstract: PURPOSE:To prevent lowering of efficiency and bad lubrication and to increase efficiency by preventing a back flow of oil to a cooling system when the operation is stopped, preventing lowering of oil level of lubricating oil in a closed casing, and supplying enough lubricating oil between a vane and a cylinder immediately after the operation. CONSTITUTION:A rotary compressor comprises an oil tank 19 connected to an intake pipe 14, a valve 20 installed in the intake pipe 14, which is formed by a Cu-Al-Ni base shape memory alloy, and the MS point of which is set to 50-90 deg.C, an oil return pipe 21 fitted to the lower part of the oil tank 19, a nonreturn valve 22 installed in the oil return pipe 21, a vane oil feed pipe 23, one end of which is fitted to the lower part of the oil tank, and the other end of which is installed in a groove of a cylinder, and a nonreturn valve 24 fitted to a connecting part between the oil tank 19 and the vane oil feed pipe 23.

公开(公告)号：JPH07145792A

公开(公告)日：1995-06-06

申请号：JP29516993

申请日：1993-11-25

Applicant: MATSUSHITA REFRIGERATION

Inventor： KAWABATA JUNTA

IPC: F04C29/02

Abstract: PURPOSE:To prevent efficiency lowering due to bad oil feed and bad lubrication and at the same time provide a highly reliable compressor by feeding lubrication oil sufficiently into a cylinder at the time of operation start and during operation, preventing the intake of a liquid refrigerant into a slide portion in the case of a rotary type compressor to be used for a freezing cycle or the like. CONSTITUTION:This compressor is equipped with a cylinder 4 to be housed in a sealed housing 1; a main bearing 7 and an auxiliary bearing 8 to be fixed at both ends of the cylinder 4; a guide pipe 19 to be fixed at the auxiliary bearing 8; the evaporation tank 20 of the part of the guide pipe 19; an oil return pipe 21 whose one side is connected to the lower part of the evaporation tank 20 and whose other side is inserted into lubrication oil 18 accumulated in the lower part of the sealed casing 1.

公开(公告)号：JPH0610865A

公开(公告)日：1994-01-21

申请号：JP16569292

申请日：1992-06-24

Applicant: MATSUSHITA REFRIGERATION

Inventor： KAWABATA JUNTA ,  KAWAI HIDEKI ,  AWASHIMA HIROKI

IPC: F04C18/356 ,  F04C29/00

Abstract: PURPOSE:To improve durability of a liquid refrigerant conveyer by providing a shaft of constituting a displacement type compressing machine part, bearing for supporting the shaft and a ball bearing stored in this shaft supporting bearing to support the shaft and sealed with grease of containing MoS2. CONSTITUTION:A shaft 20 is rotated by a motor constituted of a stator 3 and a rotor 4, to eccentrically rotate a roller 6 according to this rotation of the shaft 20, and a liquid refrigerant, guided into a cylinder from a heat conveying cycle by passing through a pipe All, is compressed and released into a case 2 through a port 10. The liquid refrigerant released into the case 2, passing through a pipe B12, is fed out to the heat conveying cycle. The shaft 20, main bearing 21 and a subbearing 22 perform rolling rotation by ball bearings 23, 24. A seal material 23e of chloroprene rubber is provided in the ball bearing 23, and a chamber, formed by an outer ring 23a, inner ring 23d and the seal material 23e of chloroprene rubber, is sealed with grease 23f contained with MoS2.