Installation and maintenance: kitchen kitchen fan is indispensable key equipment, it is recommended not to install as much as possible on the ceiling, waiting for the room to be installed, the roof or exterior wall to facilitate maintenance of the place. Work kitchen fan due to prolonged high temperatures, humidity, smoke gas. Regular maintenance is indispensable work. Point of failure: 1, resulting in greasy impeller blade curvature, angle deformation htf fire exhaust fan, air volume total pressure parameters decreased significantly kitchen exhaust fan price, reach exhaust requirements. 2, the impeller oil stains cause impeller to lose balance, increased vibration, bearing damage. 3, harsh environments easily corroded parts two-speed exhaust fan fire, damage the fan. About two-speed motor; two-speed motors are extremely variable speed induction motor exhaust fan, by changing the stator winding is connected way to achieve change in the rotating magnetic field of the stator pole pairs, thus changing the motor speed. According to the formula; n1 = 60f / p shows asynchronous motor synchronous speed and inversely proportional to the number of pole pairs, doubling the number of pole pairs, synchronous speed n1 dropped to half the original speed, motor rated speed n will drop approximately half, so changes number of pole pairs to achieve the purpose of changing the motor speed. This level of speed control method is not smooth speed control, and only applies to squirrel cage motors. Fire temperature exhaust fan, exhaust fan Anyang, Chen Yu-conditioning services provided by Wu Cheng Chen-yu air-conditioning Limited. Wu Cheng Chen Yu Air Conditioning Equipment Co., Ltd. (www.wccykt.com) strong, credible, in Dezhou 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 air conditioning and you hand into the brilliant, for a better future!