Compressor, and refrigeration device

Abstract

A compressor includes a casing that stores lubricating oil in a bottom of the casing, a compression mechanism housed in the casing, a housing that supports the compression mechanism and forms a crank chamber, a first oil return passage arranged to guide the lubricating oil flowing into the crank chamber downward, and a second oil return passage. The first oil return passage is provided with an oil return guide that contracts a flow of the lubricating oil. An upper portion of the casing forms an oil separation space that separates the lubricating oil from a high-pressure refrigerant discharged from the compression mechanism in the oil separation space. The second oil return passage guides the lubricating oil separated in the oil separation space downward, and an outlet of the second oil return passage is disposed near an outlet of the oil return guide.

1 . A compressor comprising:
 a casing configured to store lubricating oil in a bottom of the casing;   a compression mechanism housed in the casing;   a housing that supports the compression mechanism and forms a crank chamber;   a first oil return passage arranged to guide the lubricating oil flowing into the crank chamber downward, the first oil return passage being provided with an oil return guide that contracts a flow of the lubricating oil; and   a second oil return passage,   an upper portion of the casing forming an oil separation space configured to separate the lubricating oil from a high-pressure refrigerant discharged from the compression mechanism therein,   the second oil return passage being configured to guide the lubricating oil separated in the oil separation space downward, and an outlet of the second oil return passage being disposed near an outlet of the oil return guide.   
     
     
         2 . The compressor of  claim 1 , wherein
 the second oil return passage includes a pipe that penetrates the housing.   
     
     
         3 . The compressor of  claim 1 , further comprising:
 an oil return plate disposed to surround, together with an inner wall surface of the casing,
 at least a lower portion of the second oil return passage and 
 at least a lower portion of the oil return guide. 
   
     
     
         4 . The compressor of  claim 2 , further comprising:
 an oil return plate disposed to surround, together with an inner wall surface of the casing,
 at least a lower portion of the second oil return passage and 
 at least a lower portion of the oil return guide. 
   
     
     
         5 . The compressor of  claim 3 , wherein
 a space surrounded by the oil return plate and the inner wall surface of the casing narrows downward from a vicinity of the outlets of the second oil return passage and oil return guide.   
     
     
         6 . A refrigeration apparatus including the compressor of  claim 1 . 
     
     
         7 . A refrigeration apparatus including the compressor of  claim 2 . 
     
     
         8 . A refrigeration apparatus including the compressor of  claim 3 . 
     
     
         9 . A refrigeration apparatus including the compressor of  claim 5 .