System and method for defrosting/ de-icing an air-conditioner

A system for defrosting/de-icing an air-conditioner, comprising:

• a 3D depth sensor disposed inside an air-conditioner outdoor unit casing, for acquiring information regarding outer diameters of pipes of an outdoor heat exchanger, distances between the pipes, and distances between each of the pipes and an air-conditioner outdoor unit casing side plate;
• a controller connected to the 3D depth sensor, for receiving the information acquired by the 3D depth sensor and controlling the air-conditioner to enter or exit a defrost/de-ice mode;
• wherein when the outer diameters of the pipes of the outdoor heat exchanger, the distances between the pipes, and the distances between each of the pipes and the air-conditioner outdoor unit casing side plate are all greater than their respective set thresholds, the controller controls the air-conditioner to enter the defrost/de-ice mode;
• and
• when the outer diameters of the pipes of the outdoor heat exchanger, the distances between the pipes, and the distances between each of the pipes and the air-conditioner outdoor unit casing side plate are all lower than or equal to their respective set thresholds, the controller controls the air-conditioner to exit the defrost/de-ice mode.