Refrigeration apparatus

Abstract

In a refrigeration apparatus ( 20 ), refrigerant mixture in which the C 3 H m F n refrigerant represented by Molecular Formula 1: C 3 H m F n (note that “m” and “n” are integers equal to or greater than 1 and equal to or less than 5, and a relationship represented by an expression m+n=6 is satisfied) and having a single double bond in a molecular structure is equal to or greater than 70% by mass and equal to or less than 94% by mass, and the proportion of HFC refrigerant is equal to or greater than 6% by mass and equal to or less than 30% by mass; refrigerant mixture containing the C 3 H m F n refrigerant and particular refrigerant such as hydrocarbons; or refrigerant mixture containing 2,3,3,3-tetrafluoro-1-propene and carbon dioxide is used.

1 . A refrigeration apparatus, comprising:
 a refrigerant circuit in which a refrigeration cycle is performed by circulating refrigerant,   wherein the refrigerant circuit is filled with refrigerant mixture in which the proportion of refrigerant represented by Molecular Formula 1: C 3 H m F n  where “m” and “n” are integers equal to or greater than 1 and equal to or less than 5, and a relationship represented by an expression m+n=6 is satisfied, and having a single double bond in a molecular structure is equal to or greater than 70% by mass and equal to or less than 94% by mass, and the proportion of HFC refrigerant is equal to or greater than 6% by mass and equal to or less than 30% by mass.   
     
     
         2 . The refrigeration apparatus of  claim 1 , wherein
 difluoromethane is used as the HFC refrigerant in the refrigerant mixture.   
     
     
         3 . The refrigeration apparatus of  claim 2 , wherein
 only difluoromethane is used as the HFC refrigerant in the refrigerant mixture, the proportion of the refrigerant represented by Molecular Formula 1: C 3 H m F n  where “m” and “n” are the integers equal to or greater than 1 and equal to or less than 5, and the relationship represented by the expression m+n=6 is satisfied, and having the single double bond in the molecular structure is equal to or greater than 77% by mass and equal to or less than 87% by mass, and the proportion of difluoromethane is equal to or greater than 13% by mass and equal to or less than 23% by mass.   
     
     
         4 . The refrigeration apparatus of  claim 3 , wherein,
 in the refrigerant mixture, the proportion of the refrigerant represented by Molecular Formula 1: C 3 H m F n  where “m” and “n” are the integers equal to or greater than 1 and equal to or less than 5, and the relationship represented by the expression m+n=6 is satisfied, and having the single double bond in the molecular structure is equal to or greater than 77% by mass and equal to or less than 79% by mass, and the proportion of difluoromethane is equal to or greater than 21% by mass and equal to or less than 23% by mass.   
     
     
         5 . The refrigeration apparatus of  claim 1 , wherein
 pentafluoroethane is used as the HFC refrigerant in the refrigerant mixture.   
     
     
         6 . The refrigeration apparatus of  claim 5 , wherein,
 in the refrigerant mixture, the proportion of pentafluoroethane is equal to or greater than 10% by mass and equal to or less than 30% by mass.   
     
     
         7 . The refrigeration apparatus of  claim 6 , wherein,
 in the refrigerant mixture, the proportion of pentafluoroethane is equal to or greater than 10% by mass and equal to or less than 20% by mass.   
     
     
         8 . A refrigeration apparatus, comprising:
 a refrigerant circuit in which a refrigeration cycle is performed by circulating refrigerant,   wherein the refrigerant circuit is filled with refrigerant mixture containing refrigerant represented by Molecular Formula 1: C 3 H m F n  where “m” and “n” are integers equal to or greater than 1 and equal to or less than 5, and a relationship represented by an expression m+n=6 is satisfied, and having a single double bond in a molecular structure, and hydrocarbons.   
     
     
         9 . A refrigeration apparatus, comprising:
 a refrigerant circuit in which a refrigeration cycle is performed by circulating refrigerant,   wherein the refrigerant circuit is filled with refrigerant mixture containing refrigerant represented by Molecular Formula 1: C 3 H m F n  where “m” and “n” are integers equal to or greater than 1 and equal to or less than 5, and a relationship represented by an expression m+n=6 is satisfied, and having a single double bond in a molecular structure, and dimethyl ether.   
     
     
         10 . A refrigeration apparatus, comprising:
 a refrigerant circuit in which a refrigeration cycle is performed by circulating refrigerant,   wherein the refrigerant circuit is filled with refrigerant mixture containing refrigerant represented by Molecular Formula 1: C 3 H m F n  where “m” and “n” are integers equal to or greater than 1 and equal to or less than 5, and a relationship represented by an expression m+n=6 is satisfied, and having a single double bond in a molecular structure, and bis-trifluoromethyl-sulfide.   
     
     
         11 . A refrigeration apparatus, comprising:
 a refrigerant circuit in which a refrigeration cycle is performed by circulating refrigerant,   wherein the refrigerant circuit is filled with refrigerant mixture containing refrigerant represented by Molecular Formula 1: C 3 H m F n  where “m” and “n” are integers equal to or greater than 1 and equal to or less than 5, and a relationship represented by an expression m+n=6 is satisfied, and having a single double bond in a molecular structure, and helium.   
     
     
         12 . The refrigeration apparatus of  claim 1 , wherein,
 in the refrigerant mixture, 2,3,3,3-tetrafluoro-1-propene is used as the refrigerant represented by Molecular Formula 1: C 3 H m F n  where “m” and “n” are the integers equal to or greater than 1 and equal to or less than 5, and the relationship represented by the expression m+n=6 is satisfied, and having the single double bond in the molecular structure.   
     
     
         13 . A refrigeration apparatus, comprising:
 a refrigerant circuit in which a refrigeration cycle is performed by circulating refrigerant,   wherein the refrigerant circuit is filled with refrigerant mixture containing 2,3,3,3-tetrafluoro-1-propene and carbon dioxide.   
     
     
         14 . The refrigeration apparatus of  claim 1 , wherein
 a heat exchanger for exchanging heat between air and refrigerant is connected to the refrigerant circuit; and   the air exchanging heat with the refrigerant in the heat exchanger is supplied to a room.   
     
     
         15 . The refrigeration apparatus of  claim 14 , wherein
 only a heating operation is performed, in which air heated by refrigerant in the heat exchanger is supplied to a room.   
     
     
         16 . The refrigeration apparatus of  claim 14 , wherein,
 in the refrigerant circuit, an outdoor unit provided outside a room is connected to indoor units provided inside the room, through communication pipes.   
     
     
         17 . The refrigeration apparatus of  claim 1 , wherein
 a heat exchanger for exchanging heat between water and refrigerant is connected to the refrigerant circuit; and   the water is heated by the refrigerant in the heat exchanger.