Method and device for controlling air conditioner

A method for controlling an air conditioner, wherein the air conditioner comprises an outdoor heat exchanger, an indoor heat exchanger, a heat storage heat exchanger, a compressor, a four-way valve assembly, and a throttling assembly, the outdoor heat exchanger is connected to the indoor heat exchanger through either a first pipeline or a bypass, the outdoor heat exchanger is connected to the compressor through a second pipeline, the indoor heat exchanger is connected to the compressor through a third pipeline, wherein the heat storage heat exchanger is arranged at the bypass, the throttling assembly is arranged at the bypass, the four-way valve assembly comprises a first four-way valve and a second four-way valve, the first four-way valve is arranged at the second pipeline, the second four-way valve is arranged at the third pipeline,

• the method for controlling the air conditioner comprises:
• identifying an operation mode of the air conditioner;
• controlling the first four-way valve and the second four-way valve both to be electrified in response to the operation mode of the air conditioner being a heating mode;
• and
• controlling the first four-way valve to be unelectrified and the second four-way valve to be electrified in response to the operation mode of the air conditioner being a defrosting mode, controlling the outdoor heat exchanger and the indoor exchanger each serve as a condenser, controlling the heat storage heat exchanger converted from serving as a condenser to serving as an evaporator, and controlling heat absorbed from the heat storage heat exchanger for defrosting the outdoor heat exchanger.