Compressor

Abstract

A compressor includes a housing having a discharge chamber into which compressed refrigerant gas is discharged, an oil separation chamber, a passage connecting between the discharge chamber and the oil separation chamber, and an outlet port through which the refrigerant gas passed through the oil separation chamber flows out of the housing; and a cylindrical oil separator provided in the oil separation chamber. The oil separator includes a large-diameter portion, a small-diameter portion, and an intermediate portion formed between the large-diameter portion and the small-diameter portion and tapered toward the small-diameter portion. Plural holes are formed in the periphery of the small-diameter portion of the oil separator. The passage is directed toward the small-diameter portion of the oil separator in such a manner that the refrigerant gas swirls around the small-diameter portion, so that the refrigerant gas from which lubricating oil is separated enters the oil separator through the hole.

What is claimed is: 
     
         1 . A compressor, comprising:
 a housing having a discharge chamber into which compressed refrigerant gas is discharged, an oil separation chamber in which lubricating oil contained in the discharged refrigerant gas is separated, a passage connecting between the discharge chamber and the oil separation chamber, and an outlet port through which the refrigerant gas passed through the oil separation chamber flows out of the housing; and   a cylindrical oil separator provided in the oil separation chamber and connected at one end to the outlet port, the oil separator including a large-diameter portion, a small-diameter portion having a smaller diameter than the large-diameter portion, and an intermediate portion formed between the large-diameter portion and the small-diameter portion and tapered toward the small-diameter portion,   wherein plural holes are formed in the periphery of the small-diameter portion of the oil separator, and the passage is directed toward the small-diameter portion of the oil separator in such a manner that the refrigerant gas flowed through the passage into the oil separation chamber swirls around the small-diameter portion, so that the refrigerant gas from which lubricating oil is separated enters the oil separator through the hole and then exits the large-diameter portion of the oil separator.   
     
     
         2 . The compressor of  claim 1 , wherein the cross sectional area of the hole is smaller than the cross sectional area of the passage at the connection thereof to the oil separation chamber. 
     
     
         3 . The compressor of  claim 1 , wherein the small-diameter portion of the oil separator has a perforated region where the holes are formed and a non-perforated region where no hole is formed, and the passage is directed toward the non-perforated region of the small-diameter portion. 
     
     
         4 . The compressor of  claim 1 , wherein the other end of the oil separator is closed.