Refrigerant compressor

Abstract

Refrigerant compressor includes an electrical drive unit, a piston/cylinder unit which can be driven by the drive unit for the cyclical compression of refrigerant, and at least one sound-damping unit made of a thermoplastic, through which sound-damping unit refrigerant can flow and which sound-damping unit includes at least one damping chamber. The at least one sound-damping unit is connected to the piston/cylinder unit in order to enable an exchange of refrigerant between the sound-damping unit and piston/cylinder unit. The at least one sound-damping unit includes at least in sections a functional surface. The functional surface is embodied such that an emissivity of a section of the sound-damping unit includes the functional surface is less than 0.7. The at least one sound-damping unit or at least one of the sound-damping units is embodied as a discharge muffler arranged downstream of the piston/cylinder unit in the direction of flow.

1 . A refrigerant compressor comprising an electrical drive unit, a piston/cylinder unit which can be driven by the drive unit for the cyclical compression of refrigerant, and at least one sound-damping unit made of a thermoplastic, through which sound-damping unit refrigerant can flow and which sound-damping unit comprises at least one damping chamber,
 wherein the at least one sound-damping unit is connected to the piston/cylinder unit in order to enable an exchange of refrigerant between the sound-damping unit and piston/cylinder unit,   wherein the at least one sound-damping unit comprises at least in sections a functional surface, wherein the functional surface is embodied such that an emissivity of a section of the sound-damping unit comprising the functional surface is less than 0.7, preferably less than 0.5, particularly preferably less than 0.1, wherein the at least one sound-damping unit or at least one of the sound-damping units is embodied as a discharge muffler arranged downstream of the piston/cylinder unit in the direction of flow.   
     
     
         2 . The refrigerant compressor according to  claim 1 , wherein the thermoplastic comprises additives, for example, aluminum and/or chromium. 
     
     
         3 . The refrigerant compressor according to  claim 1 , wherein the functional surface is embodied as a metallic layer. 
     
     
         4 . The refrigerant compressor according to  claim 3 , wherein the at least one sound-damping unit is completely covered by the metallic layer. 
     
     
         5 . The refrigerant compressor according to  claim 3 , wherein the metallic layer contains chromium and/or aluminum. 
     
     
         6 . The refrigerant compressor according to  claim 3 , wherein the metallic layer is embodied as a metallic film. 
     
     
         7 . The refrigerant compressor according to  claim 6 , wherein the at least one sound-damping unit can be obtained by back injection-molding the metallic film. 
     
     
         8 . The refrigerant compressor according to  claim 3 , wherein the metallic layer is spread onto and/or painted onto and/or glued onto and/or galvanized onto the at least one sound-damping unit. 
     
     
         9 . The refrigerant compressor according to  claim 1 , wherein the at least one sound-damping unit or one of the sound-damping units is embodied as a suction muffler arranged upstream of the piston/cylinder unit in the direction of flow.