Refrigeration cycle device

Abstract

To provide a refrigeration cycle device that can suppress a disproportionation reaction of a working medium without impairing comfort for users.A refrigeration cycle device 1 according to the present disclosure is a refrigeration cycle device that includes an outdoor unit 30 including a compressor 31, and that includes a plurality of indoor units 10 each including an expansion valve 15, wherein a working medium containing an ethylene-based fluoroolefin is used as refrigerant, the refrigeration cycle device includes a control unit 70, and when indoor units 10 of the plurality of indoor units 10 are in an operating state, and when a discharge temperature T from the compressor 31 is a predetermined temperature T1 or higher, the control unit 70 opens the expansion valve 15 of an indoor unit 10 of indoor units 10 in an operation stop state.

1 . A refrigeration cycle device comprising:
 an outdoor unit including a compressor; and   a plurality of indoor units each including an expansion valve, wherein   a working medium containing an ethylene-based fluoroolefin is used as refrigerant,   the refrigeration cycle device includes a control unit, and   when some indoor units of the plurality of indoor units are in an operating state, and when a discharge temperature from the compressor is a predetermined temperature or higher, the control unit opens the expansion valve of at least one of the indoor units in an operation stop state.   
     
     
         2 . The refrigeration cycle device according to  claim 1 , wherein when any of the indoor units in the operating state is brought into the operation stop state, the control unit opens the expansion valve of the indoor unit that is brought into the operation stop state. 
     
     
         3 . The refrigeration cycle device according to  claim 1 , wherein
 the control unit rotates, of the indoor units in the operation stop state, an indoor fan of the indoor unit in which the expansion valve is in an open state.   
     
     
         4 . The refrigeration cycle device according to  claim 1 , wherein the control unit sets, to an extremely small opening degree, an opening degree of the expansion valve of at least one of the indoor units in the operation stop state. 
     
     
         5 . The refrigeration cycle device according to  claim 4 , wherein the extremely small opening degree is an opening degree smaller than a minimum opening degree of the expansion valve of the indoor units in the operating state. 
     
     
         6 . The refrigeration cycle device according to  claim 1 , wherein the control unit causes, of the indoor units in the operating state, the indoor units having higher pressure losses from the compressor to have a larger opening degree of the expansion valve per condensing capacity or evaporating capacity of each of the indoor units. 
     
     
         7 . The refrigeration cycle device according to  claim 1 , wherein when some indoor units of the plurality of indoor units are in the operating state, and when the discharge temperature is the predetermined temperature or higher, the control unit causes, of the indoor units in the operating state, the indoor units having lower pressure losses from the compressor to have a larger opening degree of the expansion valve. 
     
     
         8 . A refrigeration cycle device comprising:
 an outdoor unit including a compressor; and   a plurality of indoor units each including an expansion valve, wherein   a working medium containing an ethylene-based fluoroolefin is used as refrigerant, and   when some indoor units of the plurality of indoor units are in an operating state, an opening degree of the expansion valve of at least one of the indoor units in an operation stop state is always set to an extremely small opening degree.