Rotary compressor having flat muffler

Abstract

A rotary compressor includes: a casing; a motor disposed inside the casing; a compression part disposed below the motor; a lower flange disposed below the compression part; a muffler, having a portion that is flat, disposed on a lower surface of the lower flange; and a sealing plate disposed between the muffler and the lower flange.

1 . A rotary compressor comprising:
 a casing;   a motor to be disposed inside the casing;   a compression part to be disposed below the motor;   a lower flange to be disposed below the compression part;   a muffler, having a portion that is flat, to be disposed on a lower surface of the lower flange; and   a sealing plate to be disposed between the muffler and the lower flange.   
     
     
         2 . The rotary compressor of  claim 1 , wherein
 the portion that is flat is an upper end of the muffler does not protrude above the lower surface of the lower flange.   
     
     
         3 . The rotary compressor of  claim 1 , wherein
 the muffler is formed in a dome shape and includes a plurality of concave portions formed at regular intervals along a circumferential direction of the muffler on a side surface of the muffler, and   wherein the sealing plate is formed in a ring shape and includes an inner circumferential surface formed concavely and convexly corresponding to the muffler.   
     
     
         4 . The rotary compressor of  claim 3 , wherein
 the lower flange includes a plurality of lower refrigerant holes and a plurality of first bolt holes formed along an edge of the lower flange, and   wherein the muffler includes a plurality of second bolt holes formed corresponding to the plurality of first bolt holes of the lower flange at positions corresponding to the plurality of concave portions along an edge of the muffler.   
     
     
         5 . The rotary compressor of  claim 4 , wherein
 the sealing plate includes a plurality of bolt seats formed to protrude toward a center of the sealing plate from an inner circumferential surface of the sealing plate and having a plurality of third bolt holes corresponding to the plurality of second bolt holes of the muffler.   
     
     
         6 . The rotary compressor of  claim 5 , wherein
 the sealing plate is formed so as not to cover the plurality of lower refrigerant holes of the lower flange.   
     
     
         7 . The rotary compressor of  claim 6 , wherein
 a distance between a concave portion of the sealing plate and an outer circumferential surface of the sealing plate is at least 1 mm.   
     
     
         8 . The rotary compressor of  claim 1 , wherein
 a thickness of the sealing plate has a relationship with a thickness of the muffler as follows:   0.5≤thickness Ts of the sealing plate/thickness Tm of the muffler≤2.0.   
     
     
         9 . The rotary compressor of  claim 1 , wherein
 oil is received in a lower portion of the casing, and   the muffler is immersed in the oil.   
     
     
         10 . The rotary compressor of  claim 1 , wherein
 the sealing plate is formed of one of heat-resistant resin, steel, copper, and a material in which at least two of the heat-resistant resin, the steel, and the copper are laminated.   
     
     
         11 . The rotary compressor of  claim 1 , wherein
 the lower flange comprises:   a flange part formed in a disk shape;   a boss extending vertically from the flange part and including a through hole; and   a bearing disposed in the through hole of the boss, and   wherein the muffler comprises:   a fixing plate formed in a ring shape and fixed to the flange part of the lower flange;   a caulking portion fixed to one end of the boss; and   a muffler portion provided between the fixing plate and the caulking portion.   
     
     
         12 . The rotary compressor of  claim 11 , wherein
 the muffler portion includes a plurality of concave portions formed at regular intervals in a circumferential direction of the muffler.   
     
     
         13 . The rotary compressor of  claim 12 , wherein
 the fixing plate includes a plurality of protrusions corresponding to the plurality of concave portions of the muffler portion.   
     
     
         14 . The rotary compressor of  claim 13 , wherein
 the flange part of the lower flange includes a plurality of lower refrigerant holes and a plurality of first bolt holes, and   the plurality of protrusions of the fixing plate includes a plurality of second bolt holes corresponding to the plurality of first bolt holes.   
     
     
         15 . The rotary compressor of  claim 14 , wherein
 an inner circumferential surface of the sealing plate includes a plurality of bolt seats formed to correspond to the plurality of protrusions of the fixing plate and a plurality of refrigerant grooves formed so as not to cover the plurality of lower refrigerant holes of the flange part.