Exhaust fan technology continues to improve and perfect exhaust fan fire, it is more and more and more to win user acceptance. Of course, after the election of our high-quality exhaust fan, we still need to pay special attention to some small knowledge application installation in the specific application, let's take a look about the exhaust fan in the application of knowledge, especially in product storage pre-test questions. As follows: First, the appearance test: clean appearance, paint intact; two, running test: Under normal load, running longer than 30 minutes of high pressure air, without exception; three, noise detection: the fan noise according to international verification, noise value less than international and business requirements; four, vibration detection: Runtime fan, detected by vibration machine vibration velocity, and shall not exceed the international standard rate; five, speed test: tester for negligent Young speeding overspeed test ion fan, in When more than 20% of rated speed, running longer than 10 minutes; six, the whole operating current detection: Under normal load during operation of the motor current is detected by the current exceeds the standard requirements, you need to change the configuration of the motor shaft the cross-sectional flow fan is generally airfoil. Blades may be fixed position, and to be rotating about its longitudinal axis. Blades and the blade pitch angle or the air flow may be adjustable or not adjustable. Changing the blade angle or pitch is one of the main advantages of axial fan. Small blade pitch angles produce lower flow rate, while increasing the spacing may produce a higher flow rate. Advanced axial fan capable of changing the blade pitch (which is quite similar to a helicopter rotor) when the fan is running, thereby correspondingly varying the flow rate. This is called variable pitch (VP) axial fans. Hao Yang _ fire exhaust fan air-conditioning equipment (certified) _ Fans are provided by the Texas Air Conditioning Equipment Co. Hao Yang. Air Conditioning Equipment Co., Texas Hao Yang (www.dzhykt.com) is Dezhou, chemical fiber fabric, lining leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Hao Yang air conditioning equipment in leadership with the staff warmly welcome all inquiries negotiations to create Hao Yang air conditioning equipment a better future.