Turbo compressor and turbo refrigerator

Abstract

A turbo compressor is provided including: a pump which sends lubricant stored in an oil tank having an open portion; and a control valve which adjusts the flow rate of the lubricant returning to the oil tank by dividing the stream of the lubricant sent from the pump; and an oil tank cover which blocks the open portion and is provided with an installation portion for the control valve, wherein the oil tank cover includes at least one of a first passage opened from the installation portion and allowing the stream of the lubricant sent from the pump to be divided and flow toward the control valve and a second passage opened from the installation portion and allowing the lubricant to flow from the control valve toward the oil tank.

1 . A turbo compressor comprising:
 a pump which sends lubricant stored in an oil tank having an open portion;   a control valve which adjusts the flow rate of the lubricant returning to the oil tank by dividing the stream of the lubricant sent from the pump; and   an oil tank cover which blocks the open portion and is provided with an installation portion for the control valve,   wherein the oil tank cover includes at least one of a first passage opened from the installation portion and allowing the stream of the lubricant sent from the pump to be divided and flow toward the control valve and a second passage opened from the installation portion and allowing the lubricant to flow from the control valve toward the oil tank.   
     
     
         2 . The turbo compressor according to  claim 1 , further comprising:
 an oil filter which is provided at the oil tank cover and filters the lubricant sent from the pump,   wherein the first passage is provided to be divided from the passage between the pump and the oil filter.   
     
     
         3 . The turbo compressor according to  claim 1 , wherein the installation portion is formed in a planar shape. 
     
     
         4 . The turbo compressor according to  claim 2 , wherein the installation portion is formed in a planar shape. 
     
     
         5 . A turbo refrigerator comprising:
 a condenser which cools and liquefies a compressed refrigerant;   an evaporator which evaporates the liquefied refrigerant and takes evaporation heat from a cooling object to cool the cooling object; and   a compressor which compresses the refrigerant evaporated from the evaporator and supplies the compressed refrigerant to the condenser,   wherein the turbo compressor according to  claim 1  is used as the compressor.   
     
     
         6 . A turbo refrigerator comprising:
 a condenser which cools and liquefies a compressed refrigerant;   an evaporator which evaporates the liquefied refrigerant and takes evaporation heat from a cooling object to cool the cooling object; and   a compressor which compresses the refrigerant evaporated from the evaporator and supplies the compressed refrigerant to the condenser,   wherein the turbo compressor according to  claim 2  is used as the compressor.   
     
     
         7 . A turbo refrigerator comprising:
 a condenser which cools and liquefies a compressed refrigerant;   an evaporator which evaporates the liquefied refrigerant and takes evaporation heat from a cooling object to cool the cooling object; and   a compressor which compresses the refrigerant evaporated from the evaporator and supplies the compressed refrigerant to the condenser,   wherein the turbo compressor according to any one of  claim 3  is used as the compressor.   
     
     
         8 . A turbo refrigerator comprising:
 a condenser which cools and liquefies a compressed refrigerant;   an evaporator which evaporates the liquefied refrigerant and takes evaporation heat from a cooling object to cool the cooling object; and   a compressor which compresses the refrigerant evaporated from the evaporator and supplies the compressed refrigerant to the condenser,   wherein the turbo compressor according to  claim 4  is used as the compressor.