Refrigerant Compressor

Abstract

In a cylinder head 104 provided on a head side of a cylinder block 101 with a valve plate 103 interposed therebetween, a suction chamber 119 is formed on the center side and a discharge chamber 120 is formed so as to encircle the suction chamber 119 . In the cylinder head 104 , an oil storage chamber 132 for storing an oil separated from a discharged refrigerant by an oil separating portion (a separation pipe 130 etc.) is provided. The oil storage chamber 132 extends in the diametric direction of the cylinder head 104 integrally with the cylinder head 104 and has an open end at the outer face of the cylinder head 104 , and the open end is occluded by an occluding member 134 . Here, the oil storage chamber 132 has a portion bulging into the suction chamber 119.

1 . A refrigerant compressor comprising:
 a cylinder block that has a plurality of cylinder bores disposed in parallel to and around the axis of the cylinder block;   a cylinder head that is provided on one end of the cylinder block with a valve plate interposed therebetween;   pistons that are inserted from the other end of the cylinder block into the respective cylinder bores and configured to reciprocate in the cylinder bores to compress a refrigerant drawn from a suction chamber on the cylinder head side and discharge the compressed refrigerant into a discharge chamber on the cylinder head side; and   an oil recirculation mechanism that separates a lubrication oil from the refrigerant discharged into the discharge chamber and returns the lubrication oil to a lubrication portion of the compressor,   wherein the cylinder head has, in its inside, the suction chamber, the discharge chamber, a suction passage for introducing a refrigerant drawn from an external refrigerant circuit into the suction chamber, and a discharge passage for leading out the refrigerant discharged into the discharge chamber to the external refrigerant circuit,   wherein the suction chamber is disposed on the center side in the diametric direction of the cylinder head,   wherein the discharge chamber is disposed on the outer side in the diametric direction of the cylinder head so as to encircle the suction chamber,   wherein the oil recirculation mechanism has an oil storage chamber for storing the separated oil,   wherein the oil storage chamber includes a tubular portion, that extends in the diametric direction of the cylinder head integrally with the cylinder head and has an open end at the outer face of the cylinder head, and an occluding member that occludes the open end, and   wherein the tubular portion has a bulge portion bulging to the suction chamber side.   
     
     
         2 . The refrigerant compressor according to  claim 1 , wherein the bulge portion includes at least a lower region of the oil storage chamber. 
     
     
         3 . The refrigerant compressor according to  claim 2 , wherein the oil storage chamber is disposed so that the bulge portion crosses the axis of the cylinder head. 
     
     
         4 . The refrigerant compressor according to  claim 3 , wherein the oil storage chamber is disposed so as to cross the suction chamber. 
     
     
         5 . The refrigerant compressor according to  claim 1 , wherein the suction passage is disposed so that an imaginary line obtained by extending the suction passage into the suction chamber crosses the bulge portion. 
     
     
         6 . The refrigerant compressor according to  claim 2 , wherein an upper region of the oil storage chamber does not bulge into the suction chamber side or is smaller than the lower region in bulge volume.