公开(公告)号：JPH10288156A

公开(公告)日：1998-10-27

申请号：JP9704097

申请日：1997-04-15

Applicant: MATSUSHITA REFRIGERATION

Inventor： KATAYAMA MAKOTO ,  MORITA ICHIRO ,  KOBAYASHI MASANORI

IPC: F04C23/02 ,  F04B35/04 ,  H02K33/02

Abstract: PROBLEM TO BE SOLVED: To prevent local sliding and production of a wrench on a sliding part between a piston and a cylinder even at the time when an oscillating type compressor to be used for a refrigerating cycle, etc., is machined and assembled with a shaft center of the piston dislocated and to improve reliability of an elastic element. SOLUTION: This compressor is furnished with a piston 15 connected to a shaft 15 in the axial direction and free to rotate against the shaft 14. Consequently, even when it is machined and assembled with shaft centers of a cylinder 4, the piston 15 and a cylinder 4 dislocated, it is possible to prevent local sliding and production of a wrench on a sliding part between the piston 15 and the cylinder 4, to prevent lowering of efficiency of the compressor and lowering of reliability such as abrasion of the sliding part and to improve reliability of the elastic element 8.

公开(公告)号：JPH09324751A

公开(公告)日：1997-12-16

申请号：JP14407296

申请日：1996-06-06

Applicant: MATSUSHITA REFRIGERATION

Inventor： KATAYAMA MAKOTO ,  MORITA ICHIRO ,  NISHIMURA KOICHI

IPC: F04B17/04 ,  F04B35/04

Abstract: PROBLEM TO BE SOLVED: To prevent the collision of a piston caused by the increment of piston stroke due to the change of operational pressure, etc., and the occurrence of breaking and operation noise of a piston, a suction valve, and a discharge valve in a vibration compressor used for a refrigerator, an air conditioner, or the like. SOLUTION: In a vibration compressor comprising a back pressure chamber 13 surrounded by the stationary element, a communicating hole 14 whose distal end 13 is connected to the back pressure chamber 13 and an another end is connected to the inside of an inner circumference surface of a cylinder 4, and a communicating hole 15 provided at stationary element and its end is connected to the inner circumference surface 4 and an another is connected to either the hermetic case 1 or to a low pressure chamber 7a of the cylinder head, when the stroke distance is increased, by moving the center position of reciprocating motion to the anti-compression chamber side, the collision of piston 5 will be prevented and the breaking and noise generation of a piston 5, the suction valve, and the discharge valve are prevented.

公开(公告)号：JPH08170595A

公开(公告)日：1996-07-02

申请号：JP31313794

申请日：1994-12-16

Applicant: MATSUSHITA REFRIGERATION

Inventor： KATAYAMA MAKOTO

IPC: F04C29/02 ,  F04C18/356 ,  F04C29/04

Abstract: PURPOSE: To prevent lowering of oil sealing ability of a roller end surface, to restrain abrasion of the roller end surface, the end surface of a first bearing and the end surface of a second bearing, and to improve reliability of a sliding part by preventing an increase in the relative speed of the roller end surface and a set of the first bearing end surface and the second bearing end surface in a high speed rotating operation by an inverter or the like. CONSTITUTION: A closed compressor comprises a main bearing 26 and an auxiliary bearing 27 which are provided with circular grooves on the cylinder 4 side end surfaces fixed to both ends of a cylinder 4, a shaft sliding in rotation in the main bearing 26 and the auxiliary bearing 27, and bearing washers 19a, 19b stored in the circular grooves of the main bearing 26 and the auxiliary bearing 27 in such a manner as to freely rotate.