Production process exhaust fan fire: 1, the fan impeller is steel exhaust fan manual, wheel hydraulic stretch forming exhaust fan uses hydroforming press the blade exhaust fan blades and hub assembly welding forming. 2, the impeller static and dynamic balance, balance accuracy is not greater than G5.6 level. 3, the outer cylinder flange is made using whole flanged spinning at medium temperature conditions of high temperature 300 ℃ continuous operation more than 60 minutes at a temperature of 100 ℃ continuous operation 20 hours / time is not damaged, it can be used for dual exhaust ventilation . Kitchen exhaust fan function selection of various fried, fried, steamed, boiled, fried, grilled and other equipment in the process of processed foods continue to produce a variety of high temperature, humidity, pollution gas. Accumulated to a certain extent, the kitchen will be unfit to continue working. So fans will need to use polluting gases discharged through the exhaust pipe kitchen. Types of centrifugal fan Kitchen fan: air flow along the direction of movement of the fan impeller diameter. Axial fans: air flow along the axial movement of the fan impeller. Centrifugal fan total pressure is large, the motor isolated from the hot gas fumes. Not easily damaged. Small axial fans, in general, at the high temperature gas fumes to go through the motor, easily damaged. Kitchen generally recommended to use a centrifugal fan. Centrifugal fans and former stars to the multi-leaf impeller and backward impeller. Comparison to the front wheel and rear wheel advantages :() opt for a lower speed (low noise), smaller diameter can get a larger air volume total pressure. Forward impeller disadvantages: low efficiency, high energy consumption, easy cleaning cleaning. After the impeller advantages: high efficiency, energy saving, easy cleaning cleaning. After disadvantage compared to the impeller to the impeller) to be given equal air flow and total pressure required for high speed (and therefore noise), and a larger diameter front :(. Exhaust fan maintenance, up Swiss mechanical and electrical (online consultation), exhaust fan, ventilation and air conditioning provided by the liter Swiss mechanical and electrical equipment factory. L Rui HVAC Electrical Equipment Factory (www.dzsrxfkt.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. In liters Swiss electromechanical leadership with the staff warmly welcome all inquiries negotiations to create liter Swiss electromechanical better future.