Abstract: The new air conditioner air duct technology is used to change the internal flow field of the traditional floor standing air conditioner into an independent dual airflow field for cooling and heating, which realizes the return air from the lower air inlet during cooling, the air supply from the upper air outlet, and the return air from the upper air inlet during heating, the air from the lower air outlet during heating. The thermal air can be directly sent to the position below the knee of the human body to improve the thermal comfort of the human body. The new air duct can reduce the supply air temperature difference by 1.5℃, effectively improve the uniformity of the indoor temperature field, thereby improving the indoor air quality, and can achieve the purpose of energy saving.

Key words: Floor standing air conditioner, Dual airflow, Temperature field, Air quality