REFRIGERATION CYCLE APPARATUS

摘要

The air-conditioning apparatus includes a compressor (la); a heat source side heat exchanger (3a); a use side pressure- reducing mechanism (7); a use side heat exchanger (8) and an accumulator (10a) connected by a pipe so that a refrigerant circulates therethrough; a high-low pressure bypass pipe (13a); a high-low pressure bypass unit (14a) installed in the high-low pressure bypass pipe; and a unit controller (101) configured to perform a refrigerant amount detection operation in which an operation frequency of the compressor is controlled so that a value of an evaporating temperature becomes an evaporating temperature target value of the compressor to discharge a liquid-state refrigerant of the refrigerant from the accumulator by vapourisation, and control an opening degree of the high-low pressure bypass unit in performing the refrigerant amount detection operation.