Patent ID: 6161389
Filing Date: 2000-12-19
Classification: F02G,F25B

Abstract:
An improved Stirling machine of the type having a low-temperature side heat exchanger and a high-temperature side heat exchanger which perform cooling and heating operations through heat exchange between a working gas and a heat exchange medium,said low-temperature side heat exchanger comprising a top-side cylindrical heat exchange housing having a top wall and a side wall and containing therein an inner cylinder in which a piston or displacer of said Stirling machine is slid,said high-temperature side heat exchanger comprising a cylindrical annular heat exchange housing and a heat exchanger body which is fixedly inserted in said cylindrical annular heat exchange housing to form a flow passage for the heat exchange medium between said annular heat exchange housing and said heat exchanger body,wherein the improvement comprises:a fin structure formed on at least the inner peripheral surface of at least one of said top-side heat exchange housing of said low-temperature side heat exchanger and said heat exchanger body of said high-temperature side heat exchanger,a flow passage for the working gas being formed between said fin structure and the outer peripheral surface of said inner cylinder,at least one of said top-side heat exchange housing, said annular heat exchange housing and said heat exchanger body being formed by casting, anda cold-heat exchange medium pipe through which the heat exchange medium cooled by said low-temperature side heat exchanger flows, an inlet cock disposed at one end of said cold-heat exchange medium pipe and an outlet cock disposed at the other end of said cold-heat exchange medium pipe, wherein by detachably connecting said outlet cock and said inlet cock to a cold-heat exchange medium pipe of a cold-heat using equipment, a circulating pipe line for the cooled heat exchange medium is formed between said Stirling machine and said cold-heat using equipment to feed cold heat to said cold-heat using equipment.