Cryogenic refrigerator

Abstract

A cryogenic refrigerator includes a cold head that is mountable on a vacuum container, a cold head mount configured to couple the cold head with the vacuum container to allow movement of the cold head with respect to the vacuum container, a flexible line that is connected to the cold head outside the vacuum container, and a flexible line holder configured to hold the flexible line in a fixed manner with respect to the vacuum container.

What is claimed is: 
     
         1 . A cryogenic refrigerator comprising:
 a cold head that is mountable on a vacuum container;   a cold head mount configured to couple the cold head with the vacuum container to allow movement of the cold head with respect to the vacuum container;   a flexible line that is connected to the cold head outside the vacuum container; and   a flexible line holder configured to hold the flexible line in a fixed manner with respect to the vacuum container.   
     
     
         2 . The cryogenic refrigerator according to  claim 1 ,
 wherein the flexible line holder holds the flexible line at an end portion of the flexible line on a cold head side.   
     
     
         3 . The cryogenic refrigerator according to  claim 1 ,
 wherein the flexible line includes a working gas line for supplying a working gas to the cold head or collecting the working gas from the cold head, and   the flexible line holder includes a working gas line holder that holds the working gas line.   
     
     
         4 . The cryogenic refrigerator according to  claim 3 ,
 wherein the working gas line holder includes an intermediate coupling including an internal flow path through which the working gas is capable of flowing, and   the working gas line includes a first part that connects the cold head to the intermediate coupling and a second part that is connected to the intermediate coupling.   
     
     
         5 . The cryogenic refrigerator according to  claim 3 ,
 wherein the cold head mount includes an attachment flange attachable to the vacuum container, and an expandable and contractible airtight partition wall that connects the cold head to the attachment flange, and   the working gas line holder is fixed to the attachment flange.   
     
     
         6 . The cryogenic refrigerator according to  claim 1 ,
 wherein the flexible line includes a power supply cable for supplying power to the cold head, and   the flexible line holder includes a cable holder that holds the power supply cable.   
     
     
         7 . The cryogenic refrigerator according to  claim 6 ,
 wherein the cold head mount includes an attachment flange attachable to the vacuum container, and an expandable and contractible airtight partition wall that connects the cold head to the attachment flange, and   the cable holder is fixed to the attachment flange.   
     
     
         8 . The cryogenic refrigerator according to  claim 1 , further comprising:
 a drive source mounted on the cold head mount and configured to move the cold head with respect to the vacuum container;   an additional flexible line that is connected to the drive source; and   an additional flexible line holder configured to hold the additional flexible line in a fixed manner with respect to the vacuum container.   
     
     
         9 . The cryogenic refrigerator according to  claim 8 ,
 wherein the cold head mount includes an attachment flange attachable to the vacuum container, and an expandable and contractible airtight partition wall that connects the cold head to the attachment flange, and   the additional flexible line holder is fixed to the attachment flange.