| 摘要 |
A refrigerant circuit is configured by connecting, by pipes, a compressor that compresses a heat-source-side refrigerant, a first refrigerant flow switching device, a heat-source-side heat exchanger, an expansion device, and one or more intermediate heat exchangers that exchange heat between a heat-source-side refrigerant and a heat medium that is different from the heat-source-side refrigerant. A controller performs control of pumps to drive the pumps at a specific pump capacity or higher to circulate the heat medium at a time when a heat recovery defrosting operation for causing the heat-source-side refrigerant that has been heated by the heat medium in the intermediate heat exchangers to flow into the heat-source-side heat exchanger for defrosting purposes. |
| 主权项 |
1. An air-conditioning apparatus comprising:
a refrigerant circuit configured by connecting, by pipes, a compressor that compresses a heat-source-side refrigerant, a refrigerant flow switching device for switching a circulation path for the heat-source-side refrigerant, a heat-source-side heat exchanger for causing the heat-source-side refrigerant to be subjected to heat exchange, an expansion device for adjusting a pressure of the heat-source-side refrigerant, and one or more intermediate heat exchangers that exchange heat between the heat-source-side refrigerant and a heat medium different from the heat-source-side refrigerant; a heat medium circuit configured by connecting, by pipes, one or more pumps for allowing the heat medium subjected to heat exchange by the intermediate heat exchangers to circulate, a use-side heat exchanger that exchanges heat between the heat medium and air in an air-conditioning target space, and a flow switching device that switches, for the use-side heat exchanger, between passage of the heated heat medium and passage of the cooled heat medium; and a controller that performs, at a time when a heat recovery defrosting operation for causing the heat-source-side refrigerant that has been heated by the heat medium in the intermediate heat exchangers to flow into the heat-source-side heat exchanger and performing defrosting is performed, control such that the pumps are driven at a specific pump capacity or higher. |
