Abstract: When paired with a wall mounted mechanism for thermal temperature control shutdown, there is heat leakage in the one to many air conditioners, which affects the accuracy of sensor temperature sensing and even causes the air conditioner to fail to start, thereby affecting the comfort of the room. To solve this problem, experimental research was conducted using the air enthalpy method to obtain the heat leakage of the standby hanging machine under different heating conditions and air flow rates. And on the basis of experimental research, various optimizations have been made to the operation mode of the fan after the machine reaches the temperature and shuts down, allowing different users in the global market to adjust the leakage heat of the machine during the machine heating and shuts down according to the actual situation of room insulation, enhancing user comfort.

Key words: Multi-split air conditioner, Hanging air conditioner, The heat leakage, Comfort