Products; fire exhaust fan installed in the production of it can be directly connected to the wind pipe or wall mounting, and it can be installed in the form of vertical or horizontal, so it saves area in a large extent. In addition, it also can run continuously under high temperature 300 ℃ for 60 minutes or more, at a temperature of 100 ℃ for 20 hours / time is not damaged, it is widely used in high buildings, oven, underground garage, tunnels and other occasions. Exhaust fan fire a wide range: it can according to the different requirements of senior civil use of variable speed or multi-speed drive form, in order to achieve one machine (ie, when used through ventilation and fire high-temperature exhaust) purposes; leaf type divided axial flow (HTF-Ⅰ, Ⅱ) and mixed flow (HTF-Ⅲ, Ⅳ), so fans of the series has a wide range of performance parameters. Special attention is required when users require a higher noise, it can be made into a silencer-type fan. Model: HIF-II (double speed) series fire exhaust fan exhaust fan buy, high temperature motors, totally enclosed motor built with high special motor cooling system efficiency, low noise, reasonable structure, small size, easy installation application: high-rise buildings, drying room, underground garage ventilation or high-temperature exhaust. Continuous operation at 300 degrees for 60 minutes or more high temperature, medium temperature conditions of continuous operation at 100 degrees 20 hours / times without damage, fire is the ideal necessary equipment. Two-speed exhaust fan is increasingly used in high-level basement, garage exhaust ventilation exhaust fan in the power price, then we must pay attention when installing wiring method normative exhaust fan Chen Yu, the size of the series today it tells you about the two-speed fan wiring methods: 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. Exhaust fan Chen Yu, Chen Yu-conditioned (certified), exhaust fan by Wu Cheng 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.