Refrigeration cycle device

Abstract

A refrigeration cycle apparatus operating with standard composition refrigerant that is a zeotropic refrigerant mixture containing at least first refrigerant and second refrigerant having a higher boiling point than the first refrigerant at the same pressure, the refrigeration cycle apparatus including a main circuit in which a compressor, a first heat exchanger, an expansion valve, and a second heat exchanger are sequentially connected, and a component separation circuit connected to the main circuit, the first refrigerant having a property of disproportionation, the component separation circuit being configured to separate and store, from the main circuit, mixed refrigerant containing the first refrigerant having a higher composition ratio than in the standard composition refrigerant in an operation of a separation-storage mode separating the components of the standard composition refrigerant.

1 . A refrigeration cycle apparatus operating with standard composition refrigerant configured as a zeotropic refrigerant mixture containing at least first refrigerant and second refrigerant having a higher boiling point than the first refrigerant at a same pressure,
 the refrigeration cycle apparatus comprising a main circuit in which a compressor, a first heat exchanger, an expansion valve, and a second heat exchanger are sequentially connected, and   a component separation circuit connected to the main circuit,   the first refrigerant having a property of disproportionation,   the component separation circuit being configured to separate and store, from the main circuit, mixed refrigerant containing the first refrigerant having a higher composition ratio than in the standard composition refrigerant in an operation of a separation-storage mode separating components of the standard composition refrigerant,   wherein the separation-storage mode is activated at least when the compressor has a high discharging temperature or a high discharging pressure.   
     
     
         2 . The refrigeration cycle apparatus of  claim 1 , wherein the component separation circuit is configured to pass the mixed refrigerant through the main circuit in an operation of a release mode returning components of the main circuit to the standard composition refrigerant, the mixed refrigerant containing the first refrigerant having the higher composition ratio and being separated and stored from the main circuit in the separation-storage mode. 
     
     
         3 . The refrigeration cycle apparatus of  claim 2 , wherein the component separation circuit includes
 a refrigerant rectifier configured to separate the mixed refrigerant containing the first refrigerant having the higher composition ratio than in the standard composition refrigerant in an operation of the separation-storage mode, and   a refrigerant reservoir configured to store the mixed refrigerant separated by the refrigerant rectifier.   
     
     
         4 - 5 . (canceled) 
     
     
         6 . The refrigeration cycle apparatus of  claim 3 , wherein in the release mode, a connecting position for passing the mixed refrigerant through the main circuit is located on a suction pipe of the compressor, the mixed refrigerant being stored in the refrigerant reservoir and containing the first refrigerant having the higher composition ratio. 
     
     
         7 . The refrigeration cycle apparatus of  claim 3 , wherein in the release mode, a connecting position for passing the mixed refrigerant through the main circuit is located midway in a compression stroke of the compressor, the mixed refrigerant being stored in the refrigerant reservoir and containing the first refrigerant having the higher composition ratio. 
     
     
         8 . The refrigeration cycle apparatus of  claim 2 , wherein the first refrigerant is HFO1123 and the second refrigerant contains at least one of R32, HFO1234yf, and HFO1234ze. 
     
     
         9 . The refrigeration cycle apparatus of  claim 1 , wherein the component separation circuit includes
 a refrigerant rectifier configured to separate the mixed refrigerant containing the first refrigerant having a higher composition ratio than in the standard composition refrigerant in an operation of the separation-storage mode, and   a refrigerant reservoir configured to store the mixed refrigerant separated by the refrigerant rectifier.   
     
     
         10 . The refrigeration cycle apparatus of  claim 1 , wherein the first refrigerant is HFO1123 and the second refrigerant contains at least one of R32, HFO1234yf, and HFO1234ze. 
     
     
         11 . A refrigeration cycle apparatus operating with standard composition refrigerant configured as a zeotropic refrigerant mixture containing at least first refrigerant and second refrigerant having a higher boiling point than the first refrigerant at a same pressure,
 the refrigeration cycle apparatus comprising a main circuit in which a compressor, a first heat exchanger, an expansion valve, and a second heat exchanger are sequentially connected, and   a component separation circuit connected to the main circuit,   the first refrigerant having a property of disproportionation,   the component separation circuit being configured to separate and store, from the main circuit, mixed refrigerant containing the first refrigerant having a higher composition ratio than in the standard composition refrigerant in an operation of a separation-storage mode separating components of the standard composition refrigerant,   wherein the separation-storage mode is activated at least for a predetermined time before the compressor is stopped.   
     
     
         12 . The refrigeration cycle apparatus of  claim 11 , wherein the component separation circuit is configured to pass the mixed refrigerant through the main circuit in an operation of a release mode returning components of the main circuit to the standard composition refrigerant, the mixed refrigerant containing the first refrigerant having the higher composition ratio and being separated and stored from the main circuit in the separation-storage mode. 
     
     
         13 . The refrigeration cycle apparatus of  claim 12 , wherein the component separation circuit includes
 a refrigerant rectifier configured to separate the mixed refrigerant containing the first refrigerant having a higher composition ratio than in the standard composition refrigerant in an operation of the separation-storage mode, and   a refrigerant reservoir configured to store the mixed refrigerant separated by the refrigerant rectifier.   
     
     
         14 . The refrigeration cycle apparatus of  claim 13 , wherein in the release mode, a connecting position for passing the mixed refrigerant through the main circuit is located on a suction pipe of the compressor, the mixed refrigerant being stored in the refrigerant reservoir and containing the first refrigerant having the higher composition ratio. 
     
     
         15 . The refrigeration cycle apparatus of  claim 13 , wherein in the release mode, a connecting position for passing the mixed refrigerant through the main circuit is located midway in a compression stroke of the compressor, the mixed refrigerant being stored in the refrigerant reservoir and containing the first refrigerant having the higher composition ratio. 
     
     
         16 . The refrigeration cycle apparatus of  claim 12 , wherein the first refrigerant is HFO1123 and the second refrigerant contains at least one of R32, HFO1234yf, and HFO1234ze. 
     
     
         17 . The refrigeration cycle apparatus of  claim 11 , wherein the component separation circuit includes
 a refrigerant rectifier configured to separate the mixed refrigerant containing the first refrigerant having a higher composition ratio than in the standard composition refrigerant in an operation of the separation-storage mode, and   a refrigerant reservoir configured to store the mixed refrigerant separated by the refrigerant rectifier.   
     
     
         18 . The refrigeration cycle apparatus of  claim 2 , wherein the first refrigerant is HFO1123 and the second refrigerant contains at least one of R32, HFO1234yf, and HFO1234ze.