Sealed compressor and refrigeration device using the same

Abstract

In a sealed compressor, electrically-operated element and compressive element driven by electrically-operated element are housed in the inside of sealed container. Compressive element includes shaft formed of main shaft and eccentric shaft, and cylinder block having: bearing which pivotally supports main shaft of shaft; and cylinder. Further, the sealed compressor includes piston which is movable in the cylinder in a reciprocating manner, and connecting portion which connects eccentric shaft and piston to each other. Electrically-operated element is an outer-rotor-type motor which includes stator, and rotor which surrounds an outer periphery of stator and is disposed coaxially with stator. Further, stator is fixed to outer peripheral surface of bearing by adhesive agent.

1 . A sealed compressor wherein, an electrically-operated element and a compressive element driven by the electrically-operated element are housed in a sealed container,
 the compressive element includes:
 a shaft formed of a main shaft and an eccentric shaft; 
 a cylinder block having: a bearing which pivotally supports the main shaft of the shaft; and a cylinder; 
 a piston which is movable in the cylinder in a reciprocating manner; and 
 a connecting portion which connects the eccentric shaft and the piston to each other, 
   the electrically-operated element is an outer-rotor-type motor which includes: a stator; and a rotor which surrounds an outer periphery of the stator and is disposed coaxially with the stator, and   the stator is fixed to an outer peripheral surface of the bearing by an adhesive agent.   
     
     
         2 . The sealed compressor according to  claim 1 , wherein a fit-on portion which fits on the outer peripheral surface of the bearing is formed on a portion of an inner peripheral portion of the stator. 
     
     
         3 . The sealed compressor according to  claim 2 , wherein the fit-on portion is formed on an upper end surface and a lower end surface of the stator, and a gap is formed between an inner peripheral portion of the stator and the outer peripheral surface of the bearing at portions except for the fit-on portion. 
     
     
         4 . The sealed compressor according to  claim 3 , wherein an opening portion which opens in the gap formed between the inner peripheral portion of the stator and the outer peripheral surface of the bearing is formed in the fit-on portion. 
     
     
         5 . The sealed compressor according to  claim 4 , wherein a plurality of the opening portions is formed. 
     
     
         6 . The sealed compressor according to  claim 3 , wherein the gap is formed on the bearing side. 
     
     
         7 . The sealed compressor according to  claim 2 , wherein the fit-on portion is formed on an upper half of the stator on the eccentric shaft side. 
     
     
         8 . The sealed compressor according to  claim 1 , wherein the bearing is made of an iron-based material which contains carbon. 
     
     
         9 . The sealed compressor according to  claim 8 , wherein the bearing is made of the iron-based material which contains not less than 1% and not more than 7% of carbon. 
     
     
         10 . A refrigeration device comprising a refrigerant circuit formed by annularly connecting a compressor, a heat-radiator, a pressure reduction device and a heat absorbing device to each other by pipes, wherein the compressor is the sealed compressor according to  claim 1 . 
     
     
         11 . A sealed compressor, comprising:
 a shaft formed of a main shaft and an eccentric shaft;   a bearing which pivotally supports the main shaft of the shaft;   a cylinder;   a piston which is movable in the cylinder in a reciprocating manner;
 a connecting portion which connects the eccentric shaft and the piston to each other; and 
   an outer-rotor-type motor which includes:
 a stator which is fixed to an outer peripheral surface of the bearing by an adhesive agent; and 
 a rotor which is disposed coaxially with the stator.