Refrigeration cycle apparatus

Abstract

The refrigeration cycle apparatus includes a refrigerant circuit, a heat source, a utilizer, a detector, and a processor. The refrigerant circuit includes a compressor, and a carbon dioxide refrigerant flows through the refrigerant circuit. The heat source accommodates the compressor. The utilizer is connected to the heat source via a connecting pipe. The detector detects a pressure of the refrigerant in a low pressure flow path of the refrigerant circuit. The processor is configured to execute a refrigerant filling operation of moving the refrigerant from a refrigerant storage container to the refrigerant circuit. In the refrigerant filling operation, the processor is configured to control the number of rotations of the compressor on the basis of a detection value of the detector.

1 . A refrigeration cycle apparatus, comprising:
 a refrigerant circuit that includes a compressor and through which a carbon dioxide refrigerant flows;   a heat source that accommodates the compressor;   at least one utilizer connected to the heat source via a connecting pipe;   a detector configured to detect a temperature or a pressure of the refrigerant in a low pressure flow path of the refrigerant circuit; and   a processor configured to execute a refrigerant filling operation of moving the refrigerant from a refrigerant storage container to the refrigerant circuit,   wherein, during the refrigerant filling operation, the processor is further configured to control a number of rotations of the compressor on a basis of a detection value of the detector in the refrigerant filling operation.   
     
     
         2 . The refrigeration cycle apparatus according to  claim 1 , wherein the low pressure flow path includes a flow path that connects a suction pipe of the compressor and a connecting point between the heat source and the connecting pipe. 
     
     
         3 . The refrigeration cycle apparatus according to  claim 1 , wherein the refrigerant circuit includes a filling port that detachably connects the refrigerant storage container. 
     
     
         4 . The refrigeration cycle apparatus according to  claim 2 , wherein the refrigerant circuit includes a filling port that detachably connects the refrigerant storage container. 
     
     
         5 . The refrigeration cycle apparatus according to  claim 1 , wherein the filling port is a service port provided in a shutoff valve. 
     
     
         6 . The refrigeration cycle apparatus according to  claim 2 , wherein the filling port is a service port provided in a shutoff valve. 
     
     
         7 . The refrigeration cycle apparatus according to  claim 3 , wherein the filling port is a service port provided in a shutoff valve. 
     
     
         8 . The refrigeration cycle apparatus according to  claim 1 , wherein the heat source accommodates the refrigerant storage container connected to the refrigerant circuit. 
     
     
         9 . The refrigeration cycle apparatus according to  claim 2 , wherein the heat source accommodates the refrigerant storage container connected to the refrigerant circuit. 
     
     
         10 . The refrigeration cycle apparatus according to  claim 3 , wherein the heat source accommodates the refrigerant storage container connected to the refrigerant circuit. 
     
     
         11 . The refrigeration cycle apparatus according to  claim 5 , wherein the heat source accommodates the refrigerant storage container connected to the refrigerant circuit. 
     
     
         12 . The refrigeration cycle apparatus according to  claim 1 , wherein an amount of the refrigerant filled in the refrigerant storage container is 30% or more of an amount of the refrigerant filled in the heat source before the heat source is connected to the utilizer. 
     
     
         13 . The refrigeration cycle apparatus according to  claim 2 , wherein an amount of the refrigerant filled in the refrigerant storage container is 30% or more of an amount of the refrigerant filled in the heat source before the heat source is connected to the utilizer. 
     
     
         14 . The refrigeration cycle apparatus according to  claim 3 , wherein an amount of the refrigerant filled in the refrigerant storage container is 30% or more of an amount of the refrigerant filled in the heat source before the heat source is connected to the utilizer. 
     
     
         15 . The refrigeration cycle apparatus according to  claim 5 , wherein an amount of the refrigerant filled in the refrigerant storage container is 30% or more of an amount of the refrigerant filled in the heat source before the heat source is connected to the utilizer. 
     
     
         16 . The refrigeration cycle apparatus according to  claim 8 , wherein an amount of the refrigerant filled in the refrigerant storage container is 30% or more of an amount of the refrigerant filled in the heat source before the heat source is connected to the utilizer. 
     
     
         17 . The refrigeration cycle apparatus according to  claim 1 , wherein:
 the refrigerant circuit further includes an expansion mechanism, and   the processor is further configured to control an opening degree of the expansion mechanism on the basis of a detection value of the detector in the refrigerant filling operation.   
     
     
         18 . The refrigeration cycle apparatus according to  claim 1 , wherein the refrigeration cycle apparatus includes a plurality of the utilizers, the plurality of utilizers being connected to one heat source. 
     
     
         19 . The refrigeration cycle apparatus according to  claim 1 , wherein the detector is configured to detect the pressure of the refrigerant in the low pressure flow path of the refrigerant circuit. 
     
     
         20 . The refrigeration cycle apparatus according to  claim 19 , wherein, during the refrigerant filling operation, the processor is further configured to reduce a number of rotations of the compressor when the detector detects that a pressure of the refrigerant in the low pressure flow path is equal to or less than 0.52 MPa.