Turbo compressor and refrigerator

Abstract

A turbo compressor includes an impeller; compression stages having scroll chambers which introduce the refrigerant to the impeller or lead the refrigerant compressed by the rotation of the impeller to the outside; and an oil tank in which a heater is disposed and an lubricant oil is stored, and at least a part of the scroll chambers is disposed in the vicinity of the oil tank.

1 . A turbo compressor comprising:
 a case having sliding parts;   an impeller which is connected to a shaft portion supported by the sliding parts and rotates around an axis;   a plurality of compression stages having scroll chambers which introduce a fluid into the impeller or lead the fluid compressed by the rotation of the impeller to the outside, and   an oil tank in which a heating source is disposed and lubricant oils, which are supplied to the sliding parts, is stored,   wherein at least a part of the scroll chambers is disposed in the vicinity of the oil tank.   
     
     
         2 . The turbo compressor according to  claim 1 ,
 wherein at least a part of the scroll chambers is disposed under the oil surface of the lubricant oil which is stored within the oil tank.   
     
     
         3 . A refrigerator comprising:
 a condenser that cools and liquefies a compressed refrigerant;   an evaporator which cools a material to be cooled by evaporating the liquefied refrigerant to take the vaporization heat from the material to be cooled; and   a turbo compressor which compresses the refrigerant evaporated by the evaporator to supply the refrigerant to the condenser,   wherein the turbo compressor according to  claim 1  or  2  is used as the turbo compressor.