Compressor

Abstract

In a compressor compressing a refrigerant including hydrocarbon fluoride prone to disproportionate, provided, on a contact portion of the drive shaft and the bearing portion, is an elastic bearing portion as a heat generation suppression portion suppressing excessive heat generation due to line contact of an end edge portion of the bearing portion with the drive shaft during rotation of the drive shaft.

1 . A compressor compressing a refrigerant including hydrocarbon fluoride prone to disproportionation, the compressor comprising: a casing; a compression mechanism housed in the casing; an electric motor driving the compression mechanism; a drive shaft connecting the compression mechanism with the electric motor; a bearing portion rotatably supporting the drive shaft; and a heat generation suppression portion formed on a contact portion of the drive shaft and the bearing portion,
 the heat generation suppression portion suppressing excessive heat generation due to line contact of an end edge portion of the bearing portion with the drive shaft during rotation of the drive shaft.   
     
     
         2 . The compressor of  claim 1 , wherein
 the end edge portion of the bearing portion is provided with an elastic bearing portion formed to be elastic due to thin structure in that an outer diameter of the elastic bearing portion is smaller than that of a main body portion except for the end edge portion, and the heat generation suppression portion is made of the elastic bearing portion.   
     
     
         3 . The compressor of  claim 1 , wherein
 the drive shaft includes, on an engagement portion engaging with the bearing portion, a shaft side crowning portion with an outer diameter thereof decreasing in direction from a center portion toward an end edge portion of the engagement portion, and the heat generation suppression portion is made of the shaft side crowning portion.   
     
     
         4 . The compressor of  claim 1 , wherein
 the bearing portion includes, on an engagement portion engaging with the drive shaft, a bearing side crowning portion with an inner diameter thereof increasing in direction from a center portion toward an end edge portion of the engagement portion, and the heat generation suppression portion is made of the bearing side crowning portion.   
     
     
         5 . The compressor of  claim 1 , wherein
 the end edge portion of the bearing portion is provided with a bearing side oil groove portion with its inner diameter larger than a main body portion except for the end edge portion to store lubricant; the heat generation suppression portion is made of the bearing side oil groove portion.   
     
     
         6 . The compressor of  claim 1 , wherein
 the drive shaft is provided with, on a part of an engagement portion engaging with the bearing portion, a shaft side oil groove portion configured to store lubricant, and the heat generation suppression portion is made of the shaft side oil groove portion.   
     
     
         7 . The compressor of  claim 1 , wherein
 the refrigerant is a refrigerant comprising HFO-1123.   
     
     
         8 . The compressor of  claim 2 , wherein
 the refrigerant is a refrigerant comprising HFO-1123.   
     
     
         9 . The compressor of  claim 3 , wherein
 the refrigerant is a refrigerant comprising HFO-1123.   
     
     
         10 . The compressor of  claim 4 , wherein
 the refrigerant is a refrigerant comprising HFO-1123.   
     
     
         11 . The compressor of  claim 5 , wherein
 the refrigerant is a refrigerant comprising HFO-1123.   
     
     
         12 . The compressor of  claim 6 , wherein
 the refrigerant is a refrigerant comprising HFO-1123.