Sealed compressor and refrigeration cycle device

Abstract

According to one embodiment, a sealed compressor is configured to suction a working fluid to a rotary compression mechanism section through a suction pipe extending into an accumulator. The sealed compressor has a relation of Aac/Acy≦4, Vac/Vcy≧20, and As/Acy≧0.12 when an inner diameter cross-sectional area of the accumulator is denoted by Aac (mm 2 ), an inner diameter cross-sectional area of a cylinder chamber is denoted by Acy (mm 2 ), an liquid retaining capacity to an upper end of the suction pipe inside the accumulator is denoted by Vac (cc), a total displacement volume of the rotary compression mechanism section is denoted by Vcy (cc), and a total inner diameter cross-sectional area of an extension portion inside the accumulator of the suction pipe is denoted by As (mm 2 ).

What is claimed is: 
     
         1 . A sealed compressor comprising a rotary compression mechanism section accommodated in a sealed casing and an accumulator provided outside the sealed casing, the compressor configured to suction a working fluid to the rotary compression mechanism section through at least one suction pipe extending into the accumulator and connected thereto,
 wherein the rotary compression mechanism section comprises at least one cylinder each forming a cylinder chamber, and   when an inner diameter cross-sectional area of the accumulator is denoted by Aac (mm 2 ), an inner diameter cross-sectional area of one cylinder chamber is denoted by Acy (mm 2 ), a liquid retaining capacity to an upper end of the suction pipe inside the accumulator is denoted by Vac (cc), a total displacement volume of the rotary compression mechanism section is denoted by Vcy (cc), and a total inner diameter cross-sectional area of an extension portion inside the accumulator of the suction pipe is denoted by As (mm 2 ), a relation of   Aac/Acy ≦4,   Vac/Vcy≧20, and   As/Acy≧0.12 is satisfied.   
     
     
         2 . The sealed compressor of  claim 1 ,
 wherein the inner diameter cross-sectional area Acy (mm 2 ) of one cylinder chamber and the total inner diameter cross-sectional area As (mm 2 ) of the extension portion inside the accumulator of the suction pipe have a relation of   As/Acy 0.25.   
     
     
         3 . The sealed compressor of  claim 1 ,
 wherein the rotary compression mechanism section comprises two cylinders provided with a partition plate interposed therebetween, and   when an inner diameter of one cylinder chamber is denoted by Dcy (mm) and a distance between end surfaces of said two cylinders opposite to the partition plate is denoted by L (mm),   a relation of 0.9≦L/Dcy≦1.1 is satisfied.   
     
     
         4 . The sealed compressor of  claim 1 ,
 wherein the rotary compression mechanism section comprises two cylinders provided with a partition plate interposed therebetween and two suction pipes connecting the respective cylinders to the accumulator, and   when a distance between axial centers of the respective cylinders is denoted by Lc (mm) and a distance between axial centers of connecting portions of the two suction pipes with the respective cylinders is denoted by Lp (mm),   a relation of Lp>Lc is satisfied.   
     
     
         5 . A refrigeration cycle device comprising:
 the sealed compressor of  claim 1 ;   a condenser connected to the sealed compressor;   an expansion device connected to the condenser; and   an evaporator connected to the expansion device.