Variable capacity swash plate type compressor

Abstract

The present invention relates to a variable capacity swash plate type compressor, in which a check valve for circulating refrigerant inside a compressor and preventing a backflow of the refrigerant when an air conditioner is turned off is mounted on a side of a discharge muffler chamber in a cover type so that the discharge muffler chamber is formed by the check valve, thereby reducing the number of components, the number of work processes, and a pulsating pressure (pulsating noise) of discharged refrigerant, allowing that the check valve is mounted at the center of a discharge chamber without any increase in size of the compressor, preventing an overlapping phenomenon of a pulsating pressure waveform of a high-pressure refrigerant at the time of discharge since the check valve is located at the center of the discharge chamber, and preventing a separation of the check valve by fixing the check valve in the discharge chamber via a retainer.

1 . A variable capacity swash plate type compressor, which includes:
 a cylinder block having a plurality of cylinder bores formed therein;   a front housing coupled to the front of the cylinder block and having a crank chamber formed therein;   a driving shaft rotatably mounted on the cylinder block and the front housing;   a plurality of pistons mounted on the driving shaft and performing a reciprocating motion inside the cylinder bore in cooperation with a swash plate rotating inside the crank chamber;   a rear housing coupled to the rear of the cylinder block and having a suction chamber and a discharge chamber formed therein in such a manner as to be partitioned from each other by a partitioning wall, the discharge chamber having a discharge muffler chamber partitioned and formed by a division wall to reduce a pulsating pressure of discharged refrigerant; and   a check valve coupled to the inner side of the division wall to circulate the refrigerant inside the compressor and prevent a backflow of the refrigerant when an air conditioner is turned off.   
   
   
       2 . The variable capacity swash plate type compressor according to  claim 1 , wherein the check valve is mounted at the center of the discharge chamber. 
   
   
       3 . The variable capacity swash plate type compressor according to  claim 1 , wherein a retainer is combined to the division wall to prevent a separation of the check valve from the division wall after the check valve has been coupled to the inner side of the division wall the combination. 
   
   
       4 . The variable capacity swash plate type compressor according to  claim 1 , wherein the check valve includes: a cover portion having a refrigerant inflow hole formed at the center thereof; a valve body coupled to a side of the cover portion and having a refrigerant outflow hole formed therein; and a valve fluidically mounted between the cover portion and the valve body for elastically opening and closing the refrigerant inflow hole by an elastic member supported on the valve body. 
   
   
       5 . The variable capacity swash plate type compressor according to  claim 1 , wherein the check valve is forcibly pressed and coupled to the inner side of the division wall.