Compressor

Abstract

A diaphragm is provided between a frame and a stator of an electric motor. The diaphragm allows a communication passage to communicate with a gap and allows a gas passage to communicate with a discharge space. Refrigerant gas discharged from a compression mechanism flows thoroughly into the gap, passes through a communication space and the gas passage, and then, is discharged from a discharge pipe.

1 . A compressor comprising: 
 a casing having a discharge pipe;    a compression mechanism disposed in the casing; and    an electric motor having a stator that drives the compression mechanism, a first end portion and a second end portion with a gap extending inside the electric motor between the first end portion and the second end portion, the stator of the electric motor being configured and arranged relative to the casing to form a gas passage therebetween that extends from the first end portion of the electric motor to the second end portion of the electric motor,    the gas passage being configured and arranged in fluid communication with the gap such that gas discharged from the compression mechanism flows from one of the gap and the gas passage to the other, and then, flows into the discharge pipe.    
   
   
       2 . A compressor comprising: 
 a casing having a discharge pipe and a partition member configured and arranged to partition the casing to define a first accommodation space inside of the casing and a second accommodation space inside of the casing;    a compression mechanism disposed in the first accommodation space of the casing, the compression mechanism being arranged such that gas discharged from the compression mechanism passes through a communication passage disposed in the partition member to the second accommodation space;    an electric motor disposed in the second accommodation space of the casing, the electric motor having a stator drives the compression mechanism, the stator of the electric motor being configured and arranged relative to the casing to form a gas passage therebetween that extends from a first end portion of the electric motor to a second end portion of the electric motor, one end of the gas passage leading to a gap extending inside the electric motor from the first end portion of the electric motor to the second end portion of the electric motor; and    a diaphragm configured to allow the communication passage to communicate with an end of the gap and allow a discharge space coupled with the discharge pipe to communicate with the gas passage.    
   
   
       3 . The compressor of  claim 2 , wherein 
 the diaphragm is formed between the partition member and the stator of the electric motor.    
   
   
       4 . The compressor of  claim 3 , wherein 
 the diaphragm is formed integrally with the partition member.    
   
   
       5 . The compressor of  claim 3 , wherein 
 the diaphragm is formed integrally with an iron core of the stator of the electric motor so as to have a cylindrical shape protruding in an axial direction further than a coil.    
   
   
       6 . The compressor of  claim 3 , wherein 
 the diaphragm is formed by stacking annular steel plates.    
   
   
       7 . The compressor of  claim 3 , wherein 
 the diaphragm includes a cylindrical member disposed between the partition member and the stator of the electric motor.    
   
   
       8 . The compressor of  claim 2 , wherein 
 the communication passage has a flow outlet opened towards a coil of the stator.    
   
   
       9 . The compressor claims  1 , wherein 
 an outer peripheral face of the stator adheres to the casing, and    the gas passage includes a vertical trench formed in an outer peripheral portion of the stator.    
   
   
       10 . The compressor of  claim 9 , wherein 
 the vertical trench includes a plurality of vertical trenches formed along a peripheral direction, and    the discharge pipe is displaced in the peripheral direction from the vertical trenches.    
   
   
       11 . The compressor of  claim 9 , wherein 
 the discharge pipe is provided opposite the vertical trench with a drive shaft of the electric motor interposed.    
   
   
       12 . The compressor of  claim 2 , wherein 
 the stator of the electric motor is mounted indirectly to the casing through the partition member, and    the gas passage is formed around an entirety of an outer peripheral surface of the stator.    
   
   
       13 . The compressor of claims  2 , wherein 
 the discharge space is larger than a flow outlet of the gas passage.    
   
   
       14 . The compressor of claims  1 , wherein the stator of the electric motor, has a coil wound onto each of a plurality of tooth parts of an iron core of the stator.  
   
   
       15 . The compressor of  claim 2 , wherein 
 the stator of the electric motor has a coil wound onto each of a plurality of tooth parts of an iron core of the stator.    
   
   
       16 . The compressor  claim 2 , wherein 
 an outer peripheral face of the stator adheres to the casing, and    the gas passage includes a vertical trench formed in an outer peripheral portion of the stator.    
   
   
       17 . The compressor of  claim 16 , wherein 
 the vertical trench includes a plurality of vertical trenches formed along a peripheral direction, and    the discharge pipe is displaced in the peripheral direction from the vertical trenches.    
   
   
       18 . The compressor of  claim 16 , wherein 
 the discharge pipe is provided opposite the vertical trench with a drive shaft of the electric motor interposed.