Abstract: The comfort of air conditioning heating has increasingly become the focus of attention of users. However, air conditioning heating generally suffers from long heating waiting times and large vertical temperature differences. To all the phenomenon above, the effects of ambient temperature, heat leakage and air outlet angle on heating performance are analyzed through experiments, and simulation software was used to simulate the differences in room temperature rise rate and vertical temperature difference under different air outlet angles. Considering the room temperature rise and vertical temperature difference, it is concluded that when the air supply angle is 30°, the room temperature rises faster and the vertical temperature difference is small, making it the optimal air outlet angle. Which provides an important basis for the design of the heating outlet angle of wall mounted air conditioning.

Key words: Wall-mounted air conditioner, Thermal comfort, Heating, Vertical air temperature difference