What does the hotel air conditioner M stand for?

Refrigeration mode. According to the query of Qijia official website, "M" is the acronym of the English word "mode", which means mode. In air-conditioning, "M" is used to indicate the refrigeration mode, which is an air-conditioning mode that reduces the indoor temperature by taking away the heat in the air. In the cooling mode, the air conditioner will suck in the indoor heat, and discharge the heat out of the room by compressing the refrigerant.