This paper analyzes the working principle of the new air handling units: the electric control valve and fan chain to ensure that when the power cut off valve also has a closed fan. Electric control valve can also be linked with the air conditioning unit is completed quote fan, electric control valve closed when the fan is cut off. New air unit temperature control system consists of a proportional integral temperature controller, device inside air duct temperature sensor and electric control valve. Control the effect is to put air duct temperature sensor detected air temperature and transferred to the thermostat setting temperature control air conditioning units compared wucheng, and based on the consequences of PI operation, temperature electric control valve device to an on / off valve of the signal conditioning units brand, then insisted on the demand for air temperature limitations. Ease of maintenance of the air conditioning unit is equipped with specially designed access door, easy to open repair and maintenance. Condensate water to be special anti-rust treatment. Removable box, take out all the parts to repair. No damage to the firmness of the box. Fan and motor mounted on the spring damping seat, and the fan and outlet connection with a soft takeover that produces vibration motors, fans and air-conditioning tank the rest of the effective separation, eliminate vibration transfer. Air conditioning unit air conditioning units brand _ _ Chenyu conditioned by Wu Cheng Chen-yu air-conditioning Limited. Wu Cheng Chen-yu air-conditioning Co. (www.wccykt.com) strong, credible, Shandong Texas fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Chenyu into the brilliant air conditioning and you work for a better future!