Abstract: The outlet temperature is a key factor in the comfort of air conditioning during heating. When the outlet temperature is low, the human body feels cold air blowing, which seriously affects the user's experience. In order to solve the discomfort problem caused by the low heating air temperature of the air conditioner, without changing the system configuration and increasing costs, the heating control function logic is optimized to achieve an increase in the outlet air temperature. The same prototype was used in the same laboratory to compare the heating capacity and air outlet temperature of the optimized logic before and after optimization. The results showed that the average air outlet temperature increased by 1.1 ℃ to 2.9 ℃, effectively improving the comfort of air conditioning heating.

Key words: Heating outlet air temperature, Heating capacity, Blow cold wind, Functional logic, Comfort level