Air conditioner, four-way valve abnormal direction change detection method and defrosting control method

A defrosting control method for an air conditioner, comprising:

• controlling, via a control device, a four-way valve to change a direction to switch the air conditioner to a cooling state;
• detecting whether the four-way valve is abnormal in direction change by:
• obtaining a heat exchanger temperature and an ambient temperature;
• determining whether the heat exchanger temperature and the ambient temperature meet a first preset condition;
• when the heat exchanger temperature and the ambient temperature meet the first preset condition, the four-way valve is determined to be normal in direction change;
• when the heat exchanger temperature and the ambient temperature do not meet the first preset condition, obtaining work power of the air conditioner and determining whether the work power meets a second preset condition;
• and
• when the work power meets the second preset condition, the four-way valve is determined to be abnormal in direction change;
• otherwise, the four-way valve is determined to be normal in direction change;
• when the four-way valve is normal in direction change, controlling, via the control device, the air conditioner to continuously defrost;
• and
• when the four-way valve is abnormal in direction change, execute the controlling, via the control device, the four-way valve to change the direction to switch the air conditioner to the cooling state.

An air conditioner, comprising:

• a four-way valve;
• and
• a control device coupled to the four-way valve,
• wherein the control device is configured to perform operations comprising:
• obtaining a heat exchanger temperature and an ambient temperature;
• determining whether the heat exchanger temperature and the ambient temperature meet a first preset condition;
• when the heat exchanger temperature and the ambient temperature meet the first preset condition, the four-way valve is determined to be normal in direction change;
• when the heat exchanger temperature and the ambient temperature do not meet the first preset condition, obtaining work power of the air conditioner and determining whether the work power meets a second preset condition;
• and
• when the work power meets the second preset condition, the four-way valve is determined to be abnormal in direction change;
• otherwise, the four-way valve is determined to be normal in direction change.