Piston compressor

Abstract

A piston compressor in which carbon dioxide is used as a refrigerant is provided. The compressor includes a cylinder block, reciprocating pistons, a valve plate, a housing member, and sealing members. The cylinder block has an end face and a plurality of cylinder bores. The pistons are housed in the individual cylinder bores. The valve plate has a plurality of discharge ports. The housing member is fixed to the end face of the cylinder block with the valve plate in between. The housing member has a partition wall. The housing member and the valve plate define a suction chamber and a discharge chamber. The discharge chamber is connected to the cylinder bores through the corresponding discharge ports. The suction chamber and the discharge chamber are partitioned by the partition wall. The sealing members each are interposed between the valve plate and the cylinder block, and between the valve plate and the housing. A value of a ratio of the thickness of the valve plate relative to a diameter of each cylinder bore is between 0.13 and 0.4, inclusive.

1 . A piston compressor in which carbon dioxide is used as a refrigerant, the compressor comprising: 
 a cylinder block having an end face and a plurality of cylinder bores;    reciprocating pistons housed in the individual cylinder bores;    a valve plate having a plurality of discharge ports;    a housing member fixed to the end face of the cylinder block with the valve plate in between, the housing member having a partition wall, the housing member and the valve plate defining a suction chamber and a discharge chamber which is connected to the cylinder bores through the corresponding discharge ports, and the suction chamber and the discharge chamber being partitioned by the partition wall; and    sealing members each interposed between the valve plate and the cylinder block, and between the valve plate and the housing member,    wherein a value of a ratio of the thickness of the valve plate relative to a diameter of each cylinder bore is between 0.13 and 0.4, inclusive.    
   
   
       2 . The piston compressor according to  claim 1 , wherein the value of the ratio is between 0.2 and 0.35, inclusive.  
   
   
       3 . The piston compressor according to  claim 1 , wherein the sealing members are gaskets.