Muffler for compressor

Abstract

A compressor includes a cylinder block, a chamber housing, a drive shaft, a piston, and a cam mechanism. The cylinder block has a plurality of cylinder bores and a muffler chamber. The muffle chamber is formed within the cylinder block in a space between the cylinder bores. The chamber housing is secured to one end of the cylinder block and has at least a pair of a suction chamber and a discharge chamber located near each of the cylinder bores. The discharge chamber communicates with the muffler chamber. The drive shaft is rotatably supported in the cylinder block. The piston is disposed in each of the cylinder bores for compressing gas to generate compressed gas. The cam mechanism converts rotation of the drive shaft to reciprocating movement of the piston. In the present invention, pressure pulsations are suppressed without increasing the compressor in size even when the high-pressure refrigerant such as carbon dioxide is applied.

What is claimed is:  
     
         1 . A compressor comprising: 
 a cylinder block having a plurality of cylinder bores and a first muffler chamber, the first muffler chamber being formed within said cylinder block in a space between the cylinder bores;    a chamber housing being secured to one end of said cylinder block, said chamber housing having at least a pair of a suction chamber and a discharge chamber located near each of the cylinder bores, the discharge chamber communicating with the first muffler chamber;    a drive shaft rotatably supported in said cylinder block;    a piston disposed in each of the cylinder bores for compressing gas to generate compressed gas; and    a cam mechanism for converting rotation of said drive shaft to reciprocating movement of said piston.    
     
     
         2 . The compressor according to  claim 1 , wherein said cam mechanism includes a swash plate placed on said drive shaft.  
     
     
         3 . The compressor according to  claim 2 , wherein said swash plate is fixedly placed on said drive shaft.  
     
     
         4 . The compressor according to  claim 2 , wherein said swash plate is inclinably placed on said drive shaft.  
     
     
         5 . The compressor according to  claim 1 , wherein said cam mechanism includes a wobble plate placed on said drive shaft.  
     
     
         6 . The compressor according to  claim 1 , wherein said chamber housing having a second muffler chamber therein, and wherein the second muffler chamber communicates with the first muffler chamber.  
     
     
         7 . The compressor according to  claim 6 , wherein a plurality of the discharge chambers is defined, and wherein the discharge chambers communicate with each other.  
     
     
         8 . The compressor according to  claim 1 , wherein a plurality of the discharge chambers is defined, and wherein the discharge chambers communicate with each other.  
     
     
         9 . The compressor according to  claim 1 , wherein a plurality of the first muffler chambers is formed.  
     
     
         10 . The compressor according to  claim 9 , wherein the first muffler chambers communicate with each other.  
     
     
         11 . The compressor according to  claim 1 , wherein carbon dioxide is used as a refrigerant.  
     
     
         12 . The compressor according to  claim 1 , wherein said piston compresses the gas at only one end of the cylinder bore.  
     
     
         13 . The compressor according to  claim 12 , wherein said drive shaft is rotated by a motor.  
     
     
         14 . The compressor according to  claim 12 , wherein said drive shaft is operably connected to a vehicle engine through a clutch mechanism.  
     
     
         15 . The compressor according to  claim 1 , wherein said piston compresses the gas at both ends of the cylinder bore.  
     
     
         16 . A compressor comprising: 
 a cylinder block having a plurality of cylinder bores and a first muffler chamber, the first muffler chamber being formed within said cylinder block in a space between the cylinder bores;    a chamber housing being secured to one end of said cylinder block, said chamber housing having at least a pair of a suction chamber and a discharge chamber that is located near each of the cylinder bores and a second muffler chamber which is contiguous with the first muffler chamber and communicates with the first muffler chamber, the discharge chamber communicating with a pair of the first and second muffler chambers;    a drive shaft rotatably supported in said cylinder block;    a piston disposed in each of the cylinder bores for compressing gas to generate compressed gas; and    a cam mechanism for converting rotation of said drive shaft to reciprocating movement of said piston.    
     
     
         17 . The compressor according to  claim 16 , wherein a plurality of the discharge chambers is defined, and wherein the discharge chambers communicate with each other.  
     
     
         18 . The compressor according to  claim 16 , wherein a plurality of pairs of the first and second muffler chambers is formed.  
     
     
         19 . The compressor according to  claim 18 , wherein the pairs of the first and second muffler chambers communicate with each other.  
     
     
         20 . The compressor according to  claim 16 , wherein said piston compresses the gas at only one end of the cylinder bore.  
     
     
         21 . The compressor according to  claim 16 , wherein carbon dioxide is used as a refrigerant.