Rectification unit for stirling refrigerator

Abstract

A stirling refrigerator may include a compressing portion compressing operating fluid filling a housing by reciprocal motion of a piston, an expanding portion expanding the operating fluid compressed at the compressing portion by reciprocal motion of a piston, and a regenerating portion fluidly communicating the compressing portion with the expanding portion, and may provide heat at the compressing portion and may absorb heat at the expanding portion through repeating isothermal compression, constant-volume process and isothermal expansion of the operating fluid. The rectification unit may be adapted to uniformalize flow of the operating fluid flowing between the compressing portion and the expanding portion.

What is claimed is: 
     
         1 . A rectification unit for a stirling refrigerator which includes a compressing portion compressing operating fluid filling a housing by reciprocal motion of a piston, an expanding portion expanding the operating fluid compressed at the compressing portion by reciprocal motion of a piston, and a regenerating portion fluidly communicating the compressing portion with the expanding portion, and provides heat at the compressing portion and absorbs heat at the expanding portion through repeating isothermal compression, constant-volume process and isothermal expansion of the operating fluid, wherein the rectification unit comprises:
 a rectifier disposed at an end portion of a heat exchanger provided at the compressing portion or the expanding portion in the housing and rectifying the operating fluid flowing out from the compressing portion or the expanding portion and passing through the heat exchanger, and   a fixing plate adapted to fix the rectifier at the end portion of the heat exchanger.   wherein the rectification unit is adapted to uniformalize flow of the operating fluid flowing between the compressing portion and the expanding portion, and   
     
     
         2 . The rectification unit of  claim 1 , wherein the rectifier is formed by agglomerating a wire irregularly. 
     
     
         3 . The rectification unit of  claim 1 , wherein the fixing plate is provided with an insertion recess in which the rectifier is inserted. 
     
     
         4 . The rectification unit of  claim 3 , wherein the fixing plate is provided with a plurality of penetration holes penetrating the insertion recess, and wherein through the penetration holes, the operating fluid flows. 
     
     
         5 . The rectification unit of  claim 1 , wherein a sealing member is interposed between an exterior circumference of the fixing plate and an interior circumference of the housing. 
     
     
         6 . The rectification unit of  claim 1 , wherein a sealing member is interposed between a surface of the heat exchanger contacting with the fixing plate and the fixing plate. 
     
     
         7 . The rectification unit of  claim 1 , wherein the housing is provided with a slanted surface slanted toward the heat exchanger with respect to a flow hole through which the operating fluid flows in or out such that exhaust pressure is uniformalized when the operating fluid passing through the rectifier is exhausted. 
     
     
         8 . The rectification unit of  claim 7 , wherein the slanted surface is so slanted that a diameter of the slanted surface with respect to the flow hole becomes larger from the flow hole to the rectifier. 
     
     
         9 . The rectification unit of  claim 1 , wherein the fixing plate is fixed to the end portion of the heat exchanger by a snap ring mounted in an annular groove formed in the housing.