Rotary compressor and refrigeration apparatus

Abstract

A rotary compressor includes a casing, a compression mechanism housed inside the casing to compress a refrigerant, a drive shaft to drive the compression mechanism, a motor to rotate the drive shaft, and a partitioning member housed inside the casing. The partitioning member partitions an interior of the casing into a first space into which the refrigerant compressed by the compression mechanism is discharged, and a second space provided between the partitioning member and the motor. The partitioning member has a discharge flow path through which the refrigerant is discharged from the first space to the second space. The discharge flow path includes an inclined flow path that extends while inclining toward downstream in a direction of rotation of the motor.

1 . A rotary compressor comprising:
 a casing;   a compression mechanism housed inside the casing, the compression mechanism being configured to compress a refrigerant;   
       a drive shaft configured to drive the compression mechanism;
 a motor configured to rotate the drive shaft; and 
 a partitioning member housed inside the casing, 
 the partitioning member partitioning an interior of the casing into
 a first space into which the refrigerant compressed by the compression mechanism is discharged, and 
 a second space provided between the partitioning member and the motor, 
 
 the partitioning member having a discharge flow path through which the refrigerant is discharged from the first space to the second space, and 
 the discharge flow path including an inclined flow path that extends while inclining toward downstream in a direction of rotation of the motor. 
 
     
     
         2 . The rotary compressor of  claim 1 , wherein
 the discharge flow path includes an axial flow path that is continuous with an upstream side of the inclined flow path and extends along an axial direction of the motor.   
     
     
         3 . The rotary compressor of  claim 2 , wherein
 a joint portion between the axial flow path and the inclined flow path is curved.   
     
     
         4 . The rotary compressor of  claim 1 , wherein
 the discharge flow path includes a branch flow path that branches toward the motor.   
     
     
         5 . The rotary compressor of  claim 4 , wherein
 a flow path cross-sectional area of the inclined flow path is larger than a flow path cross-sectional area of the branch flow path.   
     
     
         6 . The rotary compressor of  claim 1 , wherein
 the partitioning member is made of a casting, and   at least part of the discharge flow path has a casting surface.   
     
     
         7 . The rotary compressor of  claim 1 , wherein
 the inclined flow path has
 a first surface with which the refrigerant that has flowed from the first space collides and which guides the refrigerant toward the second space, and 
 a second surface facing the first surface, 
   a downstream end of the first surface is closer to the second space than a downstream end of the second surface, as viewed in an axial direction of the motor,   an angle α is formed between
 a phantom plane passing through any point on the first surface and extending along the first surface and 
 a reference phantom plane orthogonal to the axial direction of the motor, and 
   a first angle α 1  and a second angle α 2  satisfy α 1 ≤α 2 , where
 the first angle α 1  is the angle α at the point located at a downstream end of the first surface, and 
 the second angle α 2  is the angle α at the point located at an upstream end of the first surface. 
   
     
     
         8 . The rotary compressor of  claim 7 , wherein
 the inclined flow path has
 a first flow path having a substantially constant flow path width between the first surface and the second surface, and 
 a second flow path that is continuous with a downstream side of the first flow path and has a greater flow path width than the first flow path. 
   
     
     
         9 . The rotary compressor of  claim 8 , wherein
 a downstream end of the first flow path on the first surface is closer to the first space than a downstream end of the second surface as viewed in the axial direction of the motor.   
     
     
         10 . A refrigeration apparatus including the rotary compressor of  claim 1 , the refrigeration apparatus further comprising:
 a refrigerant circuit through which a refrigerant compressed by the rotary compressor flows.