Refrigerant Compressor

Abstract

A refrigerant compressor includes a compressor mechanism part 2 , and a motor and a crank shaft 101 for driving the compressor mechanism part, in a sealed case 100 , and includes sliding bearings 103, 104 , and 105 at least either in an engagement part between the compressor mechanism part and the crank shaft or in a rotation support part of the crank shaft. Further, an unleaded resin impregnation material is used for at least one of the sliding bearings, the crank shaft is made of a ferrous material, and a hard carbon film including hydrogen is formed on a part of the crank shaft sliding with the sliding bearing using the unleaded resin impregnation material.

What is claimed is: 
     
         1 . A refrigerant compressor comprising:
 a compressor mechanism part, and a motor and a crank shaft for driving the compressor mechanism part, in a sealed case, and   a sliding bearing at least either in an engagement part between the compressor mechanism part and the crank shaft or in a rotation support part of the crank shaft, wherein:   an unleaded resin impregnation material is used for at least one of the sliding bearings,   the crank shaft is made of a ferrous material, and   a hard carbon film including hydrogen is formed on a part of the crank shaft sliding with the sliding bearing using the unleaded resin impregnation material.   
     
     
         2 . The refrigerant compressor according to  claim 1 , wherein:
 the hard carbon film is a diamond-like carbon film.   
     
     
         3 . The refrigerant compressor according to  claim 2 , wherein:
 hydrogen content of the diamond-like carbon film is 20 to 35 atom %.   
     
     
         4 . The refrigerant compressor according to  claim 3 , wherein:
 the compressor mechanism part includes a orbiting scroll and a fixed scroll,   the crank shaft has a structure to include an eccentric part at one end side, and to engage the eccentric part with an orbiting scroll bearing provided in the orbiting scroll,   a sliding bearing using an unleaded resin impregnation material is used for the orbiting scroll bearing, and   a hard carbon film including hydrogen is formed on the eccentric part of the crank shaft sliding with the sliding bearing.   
     
     
         5 . The refrigerant compressor according to  claim 3 , wherein:
 the crank shaft has a structure to be supported by a main bearing provided in a frame attached to the sealed case and a sub bearing provided in a lower frame attached to the sealed case,   a sliding bearing using an unleaded resin impregnation material is used for the sub bearing, and   a hard carbon film including hydrogen is formed on a sub shaft part of the crank shaft sliding with the sliding bearing.   
     
     
         6 . The refrigerant compressor according to  claim 3 , wherein:
 the crank shaft has a structure to be supported by a main bearing provided in a frame attached to the sealed case and a sub bearing provided in a lower frame attached to the sealed case,   a sliding bearing using an unleaded resin impregnation material is used for the main bearing, and   a hard carbon film including hydrogen is formed on a main shaft part of the crank shaft sliding with the sliding bearing.   
     
     
         7 . The refrigerant compressor according to  claim 4 , wherein:
 the crank shaft has a structure to be supported by a main bearing provided to a frame attached to the sealed case and a sub bearing provided in a lower frame attached to the sealed case,   sliding bearings using an unleaded resin impregnation material are used for the main bearing and the sub bearing, and   hard carbon films including hydrogen are formed on a main shaft part and on a sub shaft part of the crank shaft sliding with these sliding bearings.