Compressor for refrigeration and air-conditioning and refrigerating and air-conditioning apparatus

Abstract

A refrigerating machine oil including a refrigerating machine oil basis such as polyol ester oil and an additive polyol ester oil is mixed to a refrigerant including 2,3,3,3-tetrafluoropropene, 1,3,3,3-tetrafluoropropene or the like. A compressor for refrigeration and air-conditioning including the mixture charged therein is used. The composition of the additive polyol ester oil is 1 to 30 wt %. The wear resistance of the compressor is improved, and the efficiency of a refrigerating and air-conditioning apparatus using the compressor is enhanced.

1 . A compressor for refrigeration and air-conditioning, comprising a mixture charged therein,
 the mixture comprising:   a charged refrigerant which is a refrigerant including 2,3,3,3-tetrafluoropropene, 1,3,3,3-tetrafluoropropene or difluoromethane, or R410A; and   a refrigerating machine oil comprising a refrigerating machine oil basis including at least one base oil selected from the group consisting of polyol ester oils expressed by the following chemical formulae (1) and (2) (where in the formulae, R 1  represents an alkyl group having 5 to 9 carbon atoms), and an additive polyol ester oil expressed by the following chemical formula (3) (where in the formula, R 2  represents an alkyl group having 7 to 9 carbon atoms), a composition of the additive polyol ester oil being 1 to 30 wt %.   
       
         
           
           
               
               
           
         
       
     
     
         2 . The compressor according to  claim 1 , wherein a kinetic viscosity at 40° C. of the refrigerating machine oil basis is within the range of 25 to 120 mm 2 /s, and the kinetic viscosity at 40° C. of the additive polyol ester oil is 180 mm 2 /s or more. 
     
     
         3 . A refrigerating and air-conditioning apparatus comprising the compressor according to  claim 1 , a heat exchanger for dissipating the heat of the charged refrigerant discharged from the compressor, a pressure reducing unit for reducing the pressure of the charged refrigerant flowed from the heat exchanger, and a heat exchanger for heating the charged refrigerant reduced in pressure in the pressure reducing unit. 
     
     
         4 . The refrigerating and air-conditioning apparatus according to  claim 3 , wherein an adsorption capability of the additive polyol ester oil to an iron-based material is two or more times higher than that of the refrigerating machine oil basis. 
     
     
         5 . A compressor for refrigeration and air-conditioning, comprising a mixture charged therein,
 the mixture comprising:   a charged refrigerant which is a refrigerant including 2,3,3,3-tetrafluoropropene, 1,3,3,3-tetrafluoropropene, propane, propylene or fluoroethane; and   a refrigerating machine oil comprising a refrigerating machine oil basis including mineral oils or polyvinyl ether oils, or at least one base oil selected from the group consisting of polyol ester oils expressedby the following chemical formulae (1) and (2) (where in the formulae, R 1  represents an alkyl group having 5 to 9 carbon atoms), the refrigerating machine oil basis having a lower critical solution temperature of −30° C. or less, and an additive polyol ester oil expressed by the following chemical formula (3) (where in the formula, R 2  represents an alkyl group having 7 to 9 carbon atoms), a composition of the additive polyol ester oil being 1 to 30 wt %.   
       
         
           
           
               
               
           
         
       
     
     
         6 . The compressor according to  claim 5 , wherein a kinetic viscosity at 40° C. of the refrigerating machine oil basis is within the range of 25 to 120 mm 2 /s, and the kinetic viscosity at 40° C. of the additive polyol ester oil is 180 mm 2 /s or more. 
     
     
         7 . A refrigerating and air-conditioning apparatus comprising the compressor according to  claim 5 , a heat exchanger for dissipating the heat of the charged refrigerant discharged from the compressor, a pressure reducing unit for reducing the pressure of the charged refrigerant flowed from the heat exchanger, and a heat exchanger for heating the charged refrigerant reduced in pressure in the pressure reducing unit. 
     
     
         8 . The refrigerating and air-conditioning apparatus according to  claim 7 , wherein an adsorption capability of the additive polyol ester oil to an iron-based material is two or more times higher than that of the refrigerating machine oil basis. 
     
     
         9 . A compressor for refrigeration and air-conditioning comprising a mixture charged therein,
 the mixture comprising:   a refrigerant for refrigeration and air-conditioning which is a refrigerant with a global warming potential of 1000 or less, or R410A; and   a refrigerating machine oil comprising a refrigerating machine oil basis including at least one base oil selected from the group consisting of polyol ester oils expressed by the following chemical formulae (1) and (2) (where in the formulae, R 1  represents an alkyl group having 5 to 9 carbon atoms), the refrigerating machine oil basis having a kinetic viscosity at 40° C. of 25 to 120 mm 2 /s, and an additive polyol ester oil expressed by the following chemical formula (3) (where in the formula, R 2  represents an alkyl group having 7 to 9 carbon atoms), a composition of the additive polyol ester oil being 1 to 30 wt %.   
       
         
           
           
               
               
           
         
       
     
     
         10 . A refrigerating and air-conditioning apparatus comprising the compressor according to  claim 9 , a heat exchanger for dissipating the heat of the refrigerant discharged from the compressor, a pressure reducing unit for reducing the pressure of the refrigerant flowed from the heat exchanger, and a heat exchanger for heating the refrigerant reduced in pressure in the pressure reducing unit. 
     
     
         11 . The refrigerating and air-conditioning apparatus according to  claim 10 , wherein an adsorption capability of the additive polyol ester oil to an iron-based material is two or more times higher than that of the refrigerating machine oil basis.