Rotary compressor

Abstract

A rotary compressor includes a first compressing unit and a second compressing unit arranged one on top of another with a partition board therebetween. The partition board is provided with a vertical hole and a horizontal hole. After the front end of an injection copper tube to inject a refrigerant liquid is loose fit in the horizontal hole, an injection liner having an outer diameter larger than the inner diameter of the injection copper tube is inserted into the injection copper tube from the back end and is pressed up to the front end to increase the diameter of the front end of the injection copper tube such that the injection copper tube is tight fit in the horizontal hole.

1 . A rotary compressor configured to suck in refrigerant gas from a low pressure side of a refrigeration cycle, compress the refrigerant gas, and discharge the refrigerant gas to a high pressure side of the refrigeration cycle, the rotary compressor comprising:
 a compressor housing;   a first compressing unit in the compressor housing;   a second compressing unit in the compressor housing, the first compressing unit and the second compressing unit being arranged one on top of another; and   a partition board between the first compressing unit and the second compressing unit, wherein   the partition board is provided with a vertical hole that is communicated with the first compressing unit and the second compressing unit, and a horizontal hole that is communicated with the vertical hole,   an injection copper tube to inject a refrigerant liquid to the first compressing unit and the second compressing unit is loose fit in the horizontal hole, and   after a front end of the injection copper tube is loose fit in the horizontal hole, a columnar injection liner provided with an aperture and having an outer diameter larger than an inner diameter of the injection copper tube is inserted into the injection copper tube from a back end and is pressed up to the front end to increase a diameter of the front end of the injection copper tube, which is loose fit in the horizontal hole, such that the injection copper tube is tight fit in the horizontal hole.   
     
     
         2 . The rotary compressor according to  claim 1 , wherein the horizontal hole is communicated with the vertical hole via a horizontal communication hole narrower than the horizontal hole. 
     
     
         3 . The rotary compressor according to  claim 1 , wherein the injection liner is made of an iron-based material.