Refrigeration cycle apparatus

Abstract

A refrigeration cycle apparatus including a heat source side heat exchanger including a first heat exchanger and a second heat exchanger connected in parallel; an air-sending device that supplies air, which is an object to be heat exchanged in the first heat exchanger and the second heat exchanger, in a variable manner; solenoid valves that each opens and closes a refrigerant passage of the first heat exchanger and the second heat exchanger; a third refrigerant circuit that is parallelly connected to the first heat exchanger and the second heat exchanger; and a flow control valve that controls the flow rate of the refrigerant flowing in the third refrigerant circuit. The refrigeration cycle apparatus can improve continuity of control of a heat exchange capacity of a heat source side heat exchanger.

1 . A refrigeration cycle apparatus, comprising:
 a heat source side heat exchanger including a plurality of heat exchangers connected in parallel;   a supply device supplying, in a variable manner, an object to be heat exchanged to the heat source side heat exchanger, the object to be heat exchanged exchanging heat with a refrigerant that flows in the heat exchangers;   passage on-off devices opening and closing refrigerant passages of the heat exchangers, respectively;   a bypass piping being connected to the heat exchangers in parallel; and   a flow control device being provided in the bypass piping, the flow control device controlling a flow rate of the refrigerant flowing in the bypass piping while some of passages to the plurality of heat exchangers are closed.   
     
     
         2 . The refrigeration cycle apparatus of  claim 1 , further comprising a distributor regulating a gas-to-liquid ratio of a two-phase gas-liquid refrigerant to a prescribed ratio and sending out the two-phase gas-liquid refrigerant to a downstream side, the distributor being provided to a junction of pipings connected to the respective heat exchangers and the bypass piping, the junction becoming the inlet side of the heat exchangers when the heat exchangers operate as evaporators. 
     
     
         3 . The refrigeration cycle apparatus of  claim 1 , further comprising
 a connecting piping serially connecting at least some of the heat exchangers among the plurality of heat exchangers; and   an on-off valve opening and closing a passage of the connecting piping.   
     
     
         4 . The refrigeration cycle apparatus of  claim 3 , wherein the heat exchangers serially connected by the connecting piping are disposed such that the object to be heat exchanged that has exchanged heat in one of the heat exchangers that is on the downstream side in the refrigerant flow direction is supplied to one of the heat exchangers that is on the upstream side in the refrigerant flow direction. 
     
     
         5 . The refrigeration cycle apparatus of  claim 1 , wherein the refrigerant flowing in the heat exchangers is a refrigerant that transfers heat to the object to be heat exchanged in a supercritical state without being condensed when transferring heat to the object to be heat exchanged.