Air-source heat pump air conditioner

An air-source heat pump air conditioner comprising:

• a first heat pump including a first refrigeration cycle that is formed by a first air-conditioning heat exchanger, a first heat-source heat exchanger, a first compressor, and a first circulating refrigerant flowing between and through the first air-conditioning heat exchanger, the first heat-source heat exchanger, and the first compressor;
• a second heat pump including a second refrigeration cycle that is formed by a second air-conditioning heat exchanger, a second heat-source heat exchanger, a second compressor, and a second circulating refrigerant flowing between and through the second air-conditioning heat exchanger, the second heat-source heat exchanger, and the second compressor;
• an air conditioner control device comprising a microprocessor, configured to control the first heat pump and the second heat pump to operate at least one of the first refrigeration cycle and the second refrigeration cycle to adjust air-conditioning air to be in a suitable air condition for air conditioning of a space to be air conditioned, the air-conditioning air containing outside air and return air that exchange heat with the first circulating refrigerant and the second circulating refrigerant in the first air-conditioning heat exchanger and the second air-conditioning heat exchanger;
• and
• an air volume adjusting device configured to adjust an air volume of the outside air that exchanges heat with the first circulating refrigerant in the first air-conditioning heat exchanger and an air volume of the return air that exchanges heat with the second circulating refrigerant in the second air-conditioning heat exchanger, wherein
• in a case where the air-conditioning air is adjustable to be in the suitable air condition by operating both the first refrigeration cycle and the second refrigeration cycle, the air conditioner control device:
• controls the air volume adjusting device to increase the air volume of the return air and decrease the air volume of the outside air when the first heat pump has started a defrosting operation;
• and
• controls the air volume adjusting device to decrease the air volume of the return air and increase the air volume of the outside air when the second heat pump has started a defrosting operation.