Matsushita Refrigeration Company

Yasuhiko Tanaka

Ichiro Kita

Ikutomo Umeoka

Masataka Oda

A reciprocating compressor (K -K ) comprising a connecting rod ( ) in which a small end portion ( ) having a small hole ( ) and a large end portion ( ) having a large hole ( ) are coupled with each other; wherein the small end portion ( ) is coupled with a piston ( ) by a piston pin ( ) loosely fitted into the small hole ( ), while an eccentric shaft ( ) of a crank shaft ( ) is loogely fitted into the large hole ( ), wherein the large end portion ( ) is formed with a cylindrical bore ( ) having an axis passing through a center of the large hole ( ) and a fixing hole ( ) communicating with the cylindrical bore ( ); wherein after a cylindrical distal end retaining portion ( ) of a rod portion ( ) of the small end portion ( ) has been loosely fitted into or lightly press fitted into the cylindrical bore ( ), not only the cylindrical distal end portion ( ) is fixed in the cylindrical bore ( ) by inserting a locking pin ( ) into the fixing hole ( ) while a small torsional degree of freedom about an axis of the rod portion ( ) is being imparted to the rod portion ( ) but axes of the small hole ( ) and the large hole ( ) of the connecting rod ( ) are disposed so as to be maintained on an identical plane.

Reciprocating compressor

An electrically-operated sealed compressor includes a cylinder, a cylinder head mounted on the cylinder and having a suction chamber and first and second discharge chambers, a piston accommodated in the cylinder, and a valve mechanism. The valve mechanism includes a suction muffler and a valve plate having at least one suction port, first and second discharge ports, and first and second pass holes. The first discharge port and the first pass hole communicate with the first discharge chamber, while the second discharge port and the second pass hole communicate with the second discharge chamber. The valve mechanism also includes first and second discharge valves mounted on the valve plate and accommodated in the first and second discharge chambers, respectively, a suction reed having a reed valve for selectively opening and closing the suction port, a discharge gasket for sealing the valve plate and the cylinder head, and a discharge muffler. The first and second discharge chambers are separated from each other by the discharge gasket to form respective independent spaces, while the first and second pass holes communicate with the discharge muffler.

Electrically-operated sealed compressor

Electrically operated seal compressor having a refrigerant flow branch

A rotary compressor for use with refrigerating apparatuses such as freezing refrigerators, freezers, showcases for household or commercial use incorporates a mechanism in a compressor unit. When a space to be freezed is freezed in a on-off operation mode, the mechanism prevents a large amount of high temperature refrigerant gas in a closed casing of the compressor from being discharged to an evaporator during the suspension of the operation of the compressor.

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Nara, Japan

Yasuhiko Tanaka