Patent ID: 8905722
Filing Date: 2014-12-09
Classification: F04C

Abstract:
1. A compression device connected to an accumulator and a four-way valve, the compression device comprising: a shell including a casing between a top cap and a bottom cap, the casing including a first suction hole, a second suction hole, and a discharge hole; a plurality of compressors in the shell, each compressor including a rolling piston that rotates within a respective cylinder to compress a refrigerant; a valve that controls a flow of the refrigerant to allow the refrigerant to be simultaneously or successively compressed by the plurality of compressors; a first pipe through which the refrigerant is transferred into one of the plurality of compressors, the first pipe including a first portion coupled to the first suction hole of the shell and a second portion coupled to the accumulator; a second pipe through which the refrigerant compressed in the one of the plurality of compressors is discharged to an outside of the shell when the refrigerant is successively compressed by the plurality of compressors, the second pipe including a first portion coupled to the discharge hole of the shell and a second portion coupled to the four-way valve; and a third pipe, which communicates with the second pipe, and through which the refrigerant is introduced into another one of the plurality of compressors the third pipe including a first portion coupled to the second suction hole of the shell and a second portion coupled to the four-way valve, wherein a height of at least a portion of the first pipe from the bottom cap is approximately the same as a height of at least a portion of the second pipe from the bottom cap, and wherein the second suction hole of the casing is located above the first suction hole of the casing.