Compressor

Abstract

A compressor includes a suction chamber, a working chamber, a discharge chamber, a discharge valve and a thermal insulating member. A low-pressure compressible fluid resides in the suction chamber. The low-pressure compressible fluid in the suction chamber is introduced into the working chamber and is compressed to a predetermined pressure. The compressed compressible fluid in the working chamber is discharged into the discharge chamber. The discharge valve is interposed between the working chamber and the discharge chamber. The thermal insulating member is disposed in the discharge chamber. The thermal insulating member has an opening restricting portion for restricting the maximum opening degree of the discharge valve.

1 . A compressor comprising: 
 a suction chamber in which a low-pressure compressible fluid resides;    a working chamber into which the low-pressure compressible fluid in the suction chamber is introduced and in which the compressible fluid is compressed to a predetermined pressure;    a discharge chamber into which the compressed compressible fluid in the working chamber is discharged;    a discharge valve interposed between the working chamber and the discharge chamber; and    a thermal insulating member disposed in the discharge chamber, wherein the thermal insulating member has an opening restricting portion for restricting the maximum opening degree of the discharge valve.    
   
   
       2 . The compressor according to  claim 1 , further comprising an urging member for pressing the thermal insulating member against the discharge valve.  
   
   
       3 . The compressor according to  claim 1 , wherein heat transfer coefficient of the thermal insulating member is smaller than that of a housing which forms an outer shell of the compressor.  
   
   
       4 . The compressor according to  claim 2 , wherein the urging member is a spring.  
   
   
       5 . The compressor according to  claim 2 , wherein the urging member is a housing which forms an outer shell of the compressor.  
   
   
       6 . The compressor according to  claim 1 , further comprising a plate for pressing the discharge valve to a valve port plate.  
   
   
       7 . The compressor according to  claim 1 , wherein the thermal insulating member has a contacted portion which is contacted with a proximal end of the discharge valve.  
   
   
       8 . The compressor according to  claim 1 , wherein the thermal insulating member has a substantially disk-like shape.  
   
   
       9 . The compressor according to  claim 1 , wherein the thermal insulating member has an annular shape.  
   
   
       10 . The compressor according to  claim 9 , wherein the thermal insulating member has a gear-like shape.  
   
   
       11 . The compressor according to  claim 1 , wherein the thermal insulating member is made of a resin material.  
   
   
       12 . The compressor according to  claim 1 , wherein the opening restricting portion has an arched surface in cross section.  
   
   
       13 . The compressor according to  claim 1 , wherein the compressible fluid is a carbon dioxide.