Rotary compressor

Abstract

A rotary compressor includes: a sealed vertical compressor housing in which a refrigerant discharging unit is provided at an upper part, a refrigerant intake unit is provided at a lower part, and lubricant oil is retained; a compressing unit that is disposed in the compressor housing, includes an upper end plate and a lower end plate that block an annular cylinder and end portions of the cylinder, and discharges a refrigerant sucked from the intake unit through the discharging unit by compressing the refrigerant in the cylinder; and a motor that is disposed in the compressor housing, includes a cylindrical stator and a rotor that is fixed to a rotation axis to rotate in the stator, and drives the compressing unit via the rotation axis.

What is claimed is: 
     
         1 . A rotary compressor comprising:
 a sealed vertical compressor housing in which a refrigerant discharging unit is provided at an upper part, a refrigerant intake unit is provided at a lower part, and lubricant oil is retained;   a compressing unit that is disposed in the compressor housing, includes an upper end plate and a lower end plate that block an annular cylinder and end portions of the cylinder, and discharges a refrigerant sucked from the intake unit through the discharging unit by compressing the refrigerant in the cylinder; and   a motor that is disposed in the compressor housing, includes a cylindrical stator and a rotor that is fixed to a rotation axis to rotate in the stator, and drives the compressing unit via the rotation axis,   wherein, in a case where an inner diameter of a body unit of the compressor housing is φDm, an outer diameter of the upper end plate of the compressing unit is φDb, and an outer diameter of the stator of the motor is φDs, φDm, φDb, and φDs are set such that two expressions of −0.05 mm≦φDm−φDb≦0.05 mm and 0.1 mm≦φDm−φDs≦0.2 mm are satisfied, and an outer circumferential portion of the upper end plate and an outer circumferential portion of the stator are respectively spot-welded to the body unit of the compressor housing at a plurality of sites separated in a circumferential direction.   
     
     
         2 . The rotary compressor according to  claim 1 , wherein the spot welding between the stator of the motor and the body unit of the compressor housing is performed after the spot welding between the upper end plate of the compressing unit and the body unit. 
     
     
         3 . The rotary compressor according to  claim 2 , wherein the spot welding between the stator of the motor and the body unit of the compressor housing is performed in a state where centering between the stator and the rotor of the motor is performed.