AIR-CONDITIONING APPARATUS

摘要

Provided is an air-conditioning apparatus that can suppress occurrence of disproportionation (an autolytic reaction) when HFO1123 refrigerant or a refrigerant mixture containing HFO1123 is applied. The air-conditioning apparatus of the present invention includes a controller 40 controlling at least one of an operation frequency of a compressor 3, an opening degree of an expansion valve 7, and an air amount of a fan sending air to a heat-source-side heat exchanger 9 so that a temperature and a pressure of the refrigerant discharged from the compressor 3 do not exceed threshold values.

主权项

1. An air-conditioning apparatus comprising:
a refrigerant circuit in which a compressor, a heat-source-side heat exchanger, an expansion valve, and a user-side heat exchanger are sequentially connected, and refrigerant circulates therethrough, the refrigerant being HFO1123 refrigerant or a refrigerant mixture containing HFO1123; a bypass branching from a pipe connecting the expansion valve and the user-side heat exchanger and connecting at a suction side of the compressor; a vessel provided to the bypass; and a controller configured to, at a time of a pump down operation in which the refrigerant discharged from the compressor is stored in the vessel via the bypass, control at least one of an operation frequency of the compressor, an opening degree of the expansion valve, and an air amount of a fan sending air to the heat-source-side heat exchanger so that a temperature and a pressure of the refrigerant discharged from the compressor do not exceed threshold values.