Stirling-type pulse tube refrigerator and flow smoother thereof

Abstract

A Stirling-type pulse tube refrigerator includes: a compressor which pressurizes and depressurizes a gas; a regenerator which is supplied with the gas from the compressor or supplies the gas to the compressor through pressurization or depressurization of the compressor; a pulse tube which is supplied with the gas from the regenerator or supplies the gas to the regenerator; and a flow smoother which is disposed on at least one of a high temperature side and a low temperature side of the pulse tube. The flow smoother includes a plurality of meshes arranged to be laminated and a holding member which maintains gaps between the plurality of meshes.

1 . A Stirling-type pulse tube refrigerator comprising:
 a compressor which pressurizes and depressurizes a gas;   a regenerator which is supplied with the gas from the compressor or supplies the gas to the compressor through pressurization or depressurization of the compressor;   a pulse tube which is supplied with the gas from the regenerator or supplies the gas to the regenerator; and   a flow smoother which is disposed on at least one of a high temperature side and a low temperature side of the pulse tube,   wherein the flow smoother includes a plurality of meshes arranged to be laminated and a holding member which maintains gaps between the plurality of meshes.   
     
     
         2 . The Stirling-type pulse tube refrigerator according to  claim 1 ,
 wherein the compressor pressurizes and depressurizes the gas at an operation frequency of 20 Hz or higher.   
     
     
         3 . The Stirling-type pulse tube refrigerator according to  claim 1 , further comprising:
 a heat exchanger which is disposed on the high temperature side of the pulse tube; and   a buffer tank which is connected on the opposite side to the pulse tube side of the heat exchanger,   wherein the flow smoother is disposed on the heat exchanger side of the pulse tube.   
     
     
         4 . The Stirling-type pulse tube refrigerator according to  claim 1 ,
 wherein the holding member is disposed in outer peripheries of the plurality of meshes.   
     
     
         5 . The Stirling-type pulse tube refrigerator according to  claim 1 ,
 wherein the holding member is disposed at a center portion of the plurality of meshes.   
     
     
         6 . The Stirling-type pulse tube refrigerator according to  claim 5 ,
 wherein the holding member interposes the plurality of meshes therein as one body.   
     
     
         7 . The Stirling-type pulse tube refrigerator according to  claim 5 ,
 wherein the plurality of meshes have an opening portion at a center thereof, and the holding member is disposed in the opening portion.   
     
     
         8 . The Stirling-type pulse tube refrigerator according to  claim 1 ,
 wherein the plurality of meshes include a fine mesh and a coarse mesh, and   the flow smoother has the coarse mesh disposed on an outside of the fine mesh.   
     
     
         9 . A flow smoother which is used in the Stirling-type pulse tube refrigerator according to  claim 1 .