Compressor Device and a Cooling Device Having the Compressor Device

Abstract

A cooling device with a novel compressor includes a cylinder, a connector, a working gas line, a cryocooler, a piston, a drive device and a compressor element. The connector is disposed at the end of the cylinder. The working gas line connects the connector to the cryocooler. The piston is movable back and forth inside the cylinder. A transfer space exists inside the cylinder between the piston and the end of the cylinder. A portion of the transfer space contains a transfer fluid. The drive device is adapted to move the piston back and forth inside the cylinder. The compressor element is disposed inside the transfer space. A working space that contains a working gas exists inside the compressor element. The working gas contained in the working space inside the compressor element is periodically compressed by the transfer fluid as the piston periodically moves back and forth inside the cylinder.

What is claimed is: 
     
         1 . A compressor device, comprising:
 a cylinder;   a piston arranged inside the cylinder and which delimits a transfer space filled with a transfer fluid and is periodically movable back and forth via a drive device;   a compressor element arranged inside the transfer space, in particular metal bellows, which delimits a working space filled with a working gas; and   a connector, via which the working space is connectable with a working gas line to a Gifford-McMahon cooler or a pulse tube cooler, wherein the compressor element and the working gas contained therein are periodically compressed indirectly via the transfer fluid displaced by the piston.   
     
     
         2 . The compressor device of  claim 1 , wherein a volume of a fluid space enclosed by the piston, the compressor element and the cylinder is constant. 
     
     
         3 . The compressor device of one of  claim 1 or 2 , wherein the transfer space and the working space are completely configured in the cylinder. 
     
     
         4 . The compressor device of one of  claims 1 to 3 , wherein a pressure of the working medium in the working space corresponds to a pressure of the transfer fluid in the transfer space at any point in time. 
     
     
         5 . The compressor device of  claim 4 , wherein the pressure of the working medium and the pressure of the transfer fluid are greater than an ambient pressure of an environment surrounding the compressor device. 
     
     
         6 . The compressor device of one of  claims 1 to 5 , wherein a maximum piston stroke is greater than a maximum compressor-element stroke (ΔL). 
     
     
         7 . The compressor device of one of  claims 1 to 6 , wherein the piston is periodically movable back and forth by a connector rod. 
     
     
         8 . The compressor device of one of  claims 1 to 7 , wherein the compressor element is guided in a stroke direction. 
     
     
         9 . The compressor device of one of  claims 1 to 8 , wherein a closed displacer element is configured in the working space. 
     
     
         10 . A cooling device with a compressor device of one of  claims 1 to 9  and with a Gifford-McMahon cooler or a pulse tube cooler.