Refrigeration cycle apparatus

Abstract

The refrigeration cycle apparatus ( 1 ) includes a refrigerant circuit ( 2 ) that includes a flow channel ( 29 a ) through which a refrigerant in a liquid single-phase state flows, and a filter member ( 35 ) that is provided in the flow channel ( 29 a ) and that captures acid contained in the refrigerant, which passes through the flow channel.

1 . A refrigeration cycle apparatus comprising:
 a refrigerant circuit that includes a flow channel through which a refrigerant in a liquid single-phase state flows; and   a filter member that is provided in the flow channel and that captures acid contained in the refrigerant, which passes through the flow channel.   
     
     
         2 . The refrigeration cycle apparatus according to  claim 1 , wherein, on an upstream side of a flow direction of the refrigerant with respect to the filter member, the refrigerant circuit is provided with a supercooler that allows a refrigerant in a gas-liquid two-phase state to be changed to a supercooling refrigerant in a liquid single-phase state. 
     
     
         3 . The refrigeration cycle apparatus according to  claim 1 , wherein, on an upstream side of a flow direction of the refrigerant with respect to the filter member, the refrigerant circuit is provided with a gas-liquid separator that separates the refrigerant in the liquid single-phase state from a refrigerant in a gas-liquid two-phase state and that sends the refrigerant in the liquid single-phase state to the filter member. 
     
     
         4 . The refrigeration cycle apparatus according to  claim 2 , wherein, on the upstream side of the flow direction of the refrigerant with respect to the supercooler, the refrigerant circuit is provided with a receiver that separates the refrigerant in the liquid single-phase state from the refrigerant in the gas-liquid two-phase state and that sends the refrigerant in the liquid single-phase state to the supercooler. 
     
     
         5 . The refrigeration cycle apparatus according to  claim 1 , wherein
 the filter member includes a first filter member and a second filter member,   the refrigerant circuit is provided with, in the flow direction of the refrigerant, a first detour flow channel that connects an upstream side of the first filter member and a downstream side of the first filter member, and a second detour flow channel that connects an upstream side of the second filter member and a downstream side of the second filter member, and   the refrigerant passes through only one of the first filter member and the second filter member at a time of a heating operation and a cooling operation performed by an indoor unit that is connected to the refrigerant circuit.   
     
     
         6 . The refrigeration cycle apparatus according to  claim 1 , wherein
 the refrigerant circuit includes a bridge circuit in which a single piece of the filter member is provided, and   the refrigerant flows only one direction with respect to the filter member.   
     
     
         7 . The refrigeration cycle apparatus according to  claim 1 , wherein the refrigerant is an R466A refrigerant.