HTF series fire temperature exhaust fan designed specifically for high-temperature exhaust. Fan with a high temperature fire smoke roof fan motors, totally enclosed motor built-in kitchen exhaust duct fans, and a special motor cooling system to ensure safe use of the electric motors at high temperatures. By objective optimization design, the company's HTF temperature exhaust fan fire, the sentence has excellent high temperature performance, high efficiency, low noise, reasonable structure, small size and easy installation. Installed on horizontal, vertical, lifting can be. Two-speed exhaust fan is increasingly used in high-level basement, garage ventilation exhaust work, then the installation must pay attention to the normative wiring method, the size of today tells you what knit two-speed fan Connection: Large two-speed exhaust fan wiring methods: In general, the distribution of electrical power in the following 4KW Y wiring; 4KW or more (including 4KW) △ connection. Large air-conditioned two-speed fan of the group with double speed motor stator winding is △ / YY (or Y / YY) connection. Two-speed exhaust fan control principle: The Company two-speed fan motors which are equipped with double quick set stator windings △ / YY (or Y / YY) connection, the connection speed by changing the basic principles of the method of stator windings, so which changes the number of poles in order to achieve the purpose of speed, low-speed work for △ (or Y) method; high-speed operation mode when YY. Wind the electrical control box with circuit breaker, protection devices and other electrical components, according to the fan must be properly reasonable matching the rated capacity. Two-speed exhaust fan in high-rise building fire smoke exhaust system in the basement usually work for senior state and Accident smoke exhaust axial two-speed exhaust fan fire, two-speed asynchronous motor is particularly suitable. Two-speed fan running at high speed into a low-speed exhaust fan, synchronous speed improve a lot, the amount of exhaust greatly improved accordingly, then the system immediately replaced by the exhaust smoke condition. But in the design process, will encounter Electric two-speed fan control problems, that is how to solve the motor windings from Δ-connected to a dual-Y-connected conversion and interlock, fire linkage automatic and manual control; fan at high speed and reliability of protection shutdown how to maximize safety incidents smoke, how to ensure that the power supply and other issues. Axial-flow exhaust fan fire, Chen Yu-conditioned (certified), exhaust fan Langfang City by Wu Chen-yu air-conditioning Limited. Wu Cheng Chen-yu air-conditioning Co. (www.wccykt.com) is an industry leader in Shandong Dezhou, fans, ventilation equipment, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs . Chen Yu-conditioned in leadership with the staff warmly welcome all inquiries negotiations to create Chenyu air conditioning better future.