Compressor

Abstract

Provided is a compressor which enables reliable separation of oil from a refrigerant gas while suppressing increases in the size of equipment and manufacturing costs. Provided is a compressor (1) including a housing (2), a compression mechanism (13) compressing a refrigerant gas flowing into a suction space (Ss), an oil separation space (So) separating oil from the refrigerant gas compressed by the compression mechanism (13) and guiding the refrigerant gas to a discharge pipe (40), and a separation cylinder (30) disposed along an axis line (X2) of the oil separation space (So) above the oil separation space (So) in a gravitational direction. The separation cylinder (30) has a small-diameter section, a large-diameter section formed below the small-diameter section in the gravitational direction, and an introduction inlet formed in the small-diameter section. The oil separation space (So) has a separation section in which the small-diameter section and the large-diameter section are disposed, the separation section having a first inner diameter larger than a second outer diameter of the large-diameter section, and an oil storage section disposed below the separation section. The refrigerant gas compressed by the compression mechanism (13) flows into the separation section.

1 . A compressor comprising:
 a housing forming a suction space for a refrigerant gas inside;   a compression mechanism disposed in the housing and compressing the refrigerant gas flowing into the suction space;   an oil separation space formed in the housing so as to extend in a gravitational direction, separating oil from the refrigerant gas compressed by the compression mechanism, and guiding the refrigerant gas to a discharge pipe; and   a cylindrical member disposed along an axis line of the oil separation space above the oil separation space in the gravitational direction, wherein   the cylindrical member has   a small-diameter section having a first outer diameter,   a large-diameter section formed below the small-diameter section in the gravitational direction and having a second outer diameter larger than the first outer diameter, and   an introduction inlet formed in the small-diameter section and guiding the refrigerant gas to an internal space of the cylindrical member,   the oil separation space has   a first space section in which the small-diameter section and the large-diameter section are disposed, the first space section having a first inner diameter larger than the second outer diameter, and   a second space section disposed below the first space section in the gravitational direction, and   the refrigerant gas compressed by the compression mechanism flows into the first space section.   
     
     
         2 . The compressor according to  claim 1 , wherein
 the large-diameter section is formed in a tapered shape having an outer diameter gradually increasing from the first outer diameter to the second outer diameter from an upper side toward a lower side in the gravitational direction.   
     
     
         3 . The compressor according to  claim 1 , wherein
 the refrigerant gas compressed by the compression mechanism flows in from an upper part of the small-diameter section, and   the introduction inlet is formed at a lower end of the small-diameter section in the gravitational direction.   
     
     
         4 . The compressor according to  claim 1 , wherein
 the compression mechanism is a mechanism compressing the refrigerant gas by a pair of a fixed scroll and an orbiting scroll being disposed so as to face each other and the orbiting scroll being driven to revolve with respect to the fixed scroll.