AIR-CONDITIONING APPARATUS

摘要

An air-conditioning apparatus including a refrigeration cycle configured by connecting one or more load-side units including a load-side heat exchanger and a load-side expansion device with a heat-source-side unit including a heat-source-side heat exchanger and a compressor and by causing refrigerant to circulate through a refrigerant circuit including the load-side heat exchanger, the load-side expansion device, the heat-source-side heat exchanger, and the compressor, controls, during a heating operation, the opening degree of the load-side expansion device, based on the discharge pressure of the compressor, so that the pressure of refrigerant at the outlet of the compressor becomes equal to a target pressure, in the case where the operation capacity of the compressor is approximately at the maximum value of the operation capacity of the compressor.

主权项

1. An air-conditioning apparatus including a refrigeration cycle configured by connecting a load-side heat exchanger, a first expansion device, a heat-source-side heat exchanger and a compressor and by causing refrigerant to circulate through a refrigerant circuit including the load-side heat exchanger, the first expansion device, the heat-source-side heat exchanger, and the compressor,
the air-conditioning apparatus comprising a controller configured to control an opening degree of the first expansion device and an operation capacity of the compressor, wherein the controller, during a heating operation, controls an opening degree of the first expansion device so that a degree of subcooling of the refrigerant at an outlet of the load-side heat exchanger becomes equal to a target degree of subcooling and controls an operation capacity of the compressor so that pressure of the refrigerant at an outlet of the compressor becomes equal to a target pressure, and in a case where an operation capacity of the compressor is approximately at a maximum value of the operation capacity of the compressor and a condensing temperature of the load-side heat exchanger is lower than a target temperature, the controller controls an opening degree of the first expansion device, based on a discharge pressure of the compressor, so that pressure of the refrigerant at the outlet of the compressor becomes equal to a target pressure.