Refrigerant Compressor

Abstract

Oil recirculation mechanism includes an oil separation portion (separation chamber 104 b 2 , separation pipe 130 ) for separating oil from a discharged refrigerant, oil storage chamber 132 for storing the separated oil, oil return passage through which the oil storage chamber 132 communicates with the suction chamber 119 , and orifice 136 with a filter. The oil storage chamber 132 extends in a diametric direction of a compressor housing and has an open end at an outer face of the housing, and the open end is occluded by an occluding member. A partition wall (bulge portion 132 a ), that separates the oil storage chamber 132 from the suction chamber 119 , is disposed in a region more inside than the opening of the open end. An oil return passage is linearly formed through the partition wall and the orifice 136 with a filter is accommodated and positioned in the oil return passage.

1 . A refrigerant compressor which includes:
 a compressing mechanism that compresses a refrigerant drawn from an external refrigerant circuit and discharges the compressed refrigerant; and   an oil recirculation mechanism that separates a lubrication oil from the refrigerant discharged from the compressing mechanism and returns the lubrication oil to a suction pressure region of the compressing mechanism,   the oil recirculation mechanism comprising:   an oil separation portion for separating an oil from the discharged refrigerant;   an oil storage chamber for storing the oil separated by the oil separation portion;   an oil return passage through which the oil storage chamber communicates with the suction pressure region; and   a depressurizing device provided in the oil return passage,   wherein the oil storage chamber extends in a diametric direction of a compressor housing and has an open end at an outer face of the housing, and the open end is occluded by an occluding member;   wherein a partition wall, that separates the oil storage chamber from the suction pressure region, is disposed in a region more inside than the opening of the open end;   wherein a through-hole, that is the oil return passage and that penetrates through the partition wall and has one end opening to the oil storage chamber and the other end opening to the suction pressure region, is linearly formed so that the through-hole is observed from the opening of the open end; and   wherein the depressurizing device is accommodated and positioned in the through-hole.   
     
     
         2 . The refrigerant compressor according to  claim 1 ,
 wherein a sealing member is provided between an inner periphery of the through-hole and an outer periphery of the depressurizing device,   wherein the depressurizing device has a filter covering an oil storage chamber side entrance portion of the pressurizing device, and   wherein the filter protrudes into the oil storage chamber so that the tip of the filter faces in proximity to the occluding member.   
     
     
         3 . The refrigerant compressor according to  claim 1 , wherein the oil storage chamber extends in the vertical direction so that the open end is on the lower side, and an oil introduction hole to the oil storage chamber is formed in a region opposing to the opening of the open end. 
     
     
         4 . The refrigerant compressor according to  claim 1 , wherein the oil storage chamber is formed so that its opening area increases toward the open end.