Air conditioner and method for calculating operating parameter of indoor unit

A method for calculating an operating parameter of an indoor unit, applied to an air conditioner, and the air conditioner including:

• an outdoor unit, including a compressor, a four-way valve, an outdoor heat exchanger, and an outdoor expansion valve;
• and
• an indoor unit, including:
• an indoor expansion valve;
• an indoor heat exchanger, wherein the compressor, the four-way valve, the outdoor heat exchanger, the outdoor expansion valve, the indoor expansion valve, and the indoor heat exchanger are sequentially connected, so as to provide a refrigerant circulation;
• and
• a plurality of first sensors configured to detect at least one of a temperature or a pressure of the refrigerant circulation, so as to make a controller determine a superheat degree of an outlet of the indoor heat exchanger and a heat exchange temperature difference of the indoor heat exchanger that are in a first cooling state, the first cooling state referring to a current cooling state of the indoor unit;
• wherein the method comprises:
• in a case where the air conditioner is in a cooling mode,
• determining an operating parameter of the indoor unit in a second cooling state according to a heat exchange area, a heat exchange coefficient, and the heat exchange temperature difference of the indoor heat exchanger;
• the heat exchange coefficient of the indoor heat exchanger being determined according to the heat exchange area and a wind speed;
• the second cooling state referring to a cooling state in which the superheat degree of the outlet of the indoor heat exchanger is substantially equal to a first preset value in the cooling mode;
• the operating parameter of the indoor unit in the second cooling state including a sensible heat load of the indoor unit in the second cooling state;
• and
• determining an operating parameter of the indoor unit in the first cooling state according to the superheat degree of the outlet of the indoor heat exchanger in the first cooling state, the superheat degree of the outlet of the indoor heat exchanger in the second cooling state, and the operating parameter of the indoor unit in the second cooling state.