Air conditioner

Abstract

An air conditioner includes a refrigerant circuit and refrigerant. The refrigerant circuit has a compressor, a condenser, a pressure-regulating valve, and an evaporator. The refrigerant is R32. The pressure-regulating valve includes a flow path causing the refrigerant flowing from the condenser to flow to the evaporator, a pressure reference chamber partitioned from the flow path and filled with inert gas, and a valve portion. The pressure-regulating valve is configured to adjust a degree of opening of the valve portion to adjust a flow rate of the refrigerant flowing through the flow path. The valve portion is configured to increase the degree of opening when a pressure in the flow path is higher than a pressure in the pressure reference chamber, and reduce the degree of opening when the pressure in the flow path is lower than the pressure in the pressure reference chamber.

1 . An air conditioner comprising:
 a refrigerant circuit comprising a compressor, a condenser, a pressure-regulating valve, and an evaporator; and   refrigerant flowing through the refrigerant circuit in an order of the compressor, the condenser, the pressure-regulating valve, and the evaporator, wherein   the refrigerant is R32,   the pressure-regulating valve comprises
 a case, 
 a diaphragm attached to an inner side of the case to partition an interior of the case, 
 a flow path provided by partitioning the interior of the case by the diaphragm, the flow path causing the refrigerant flowing from the condenser to flow to the evaporator, 
 a pressure reference chamber partitioned from the flow path by the diaphragm and filled with inert gas, 
 a valve portion disposed in the flow path, and 
 a partition member disposed in the flow path, 
   the pressure-regulating valve is configured to adjust a degree of opening of the valve portion to adjust a flow rate of the refrigerant flowing through the flow path, and   the valve portion is configured to
 increase the degree of opening when a pressure in the flow path is higher than a pressure in the pressure reference chamber, and 
 reduce the degree of opening when the pressure in the flow path is lower than the pressure in the pressure reference chamber, 
   the valve portion comprises
 a valve body connected to the diaphragm, and 
 a valve seat provided in the partition member, and 
   the pressure-regulating valve is configured to cause the refrigerant to flow into the pressure-regulating valve also when the valve body is in contact with the valve seat.   
     
     
         2 . The air conditioner according to  claim 1 , wherein an amount of the refrigerant flowing through the refrigerant circuit is 300 g or more and 500 g or less. 
     
     
         3 . The air conditioner according to  claim 1 , wherein
 the pressure-regulating valve comprises a capillary, and   the capillary is disposed between the valve portion and the evaporator in the refrigerant circuit.   
     
     
         4 . The air conditioner according to  claim 1 , wherein
 the pressure-regulating valve comprises a capillary, and   the capillary is disposed in parallel with the valve portion in the refrigerant circuit.   
     
     
         5 . The air conditioner according to  claim 1 , wherein the compressor is configured to variably control a number of rotations. 
     
     
         6 . The air conditioner according to  claim 2 , wherein
 the pressure-regulating valve comprises a capillary, and   the capillary is disposed between the valve portion and the evaporator in the refrigerant circuit.   
     
     
         7 . The air conditioner according to  claim 2 , wherein
 the pressure-regulating valve comprises a capillary, and   the capillary is disposed in parallel with the valve portion in the refrigerant circuit.   
     
     
         8 . The air conditioner according to  claim 2 , wherein the compressor is configured to variably control a number of rotations. 
     
     
         9 . The air conditioner according to  claim 3 , wherein the compressor is configured to variably control a number of rotations. 
     
     
         10 . The air conditioner according to  claim 4 , wherein the compressor is configured to variably control a number of rotations. 
     
     
         11 . The air conditioner according to  claim 6 , wherein the compressor is configured to variably control a number of rotations. 
     
     
         12 . The air conditioner according to  claim 7 , wherein the compressor is configured to variably control a number of rotations.