Miniature dc cooling fan noise processing

Miniature dc cooling fan, strange and familiar for you, stranger because of its name, familiar with because we often come into contact with, often in our apart when old equipment or maintenance of household appliances, we can see the figure of it, then the following by wen ling chi automotive air conditioning technology dc cooling fan manufacturers to explain the micro dc cooling fan noise causes and treatment methods. Before this, we must first understand the micro dc cooling fan noise and what factors, 1. Rotational speed. Cooling fan speed faster, dc cooling fan, the greater the noise out of course 2. Bearings. Dc cooling fan bearing simply divided into two kinds, one kind is oil, is a ball, under normal circumstances, the ball bearing cooling fan than oil bearing cooling fan noise. 3. The air flow. The cooling fan blades during the rotation, is the resistance in the air, the faster the rotation, fan leaf area is larger, the greater the resistance, so the noise will be larger. 4, the frictional force. The cooling fan to use time is too long, the cooling fan will appear more box, vibration, etc. In some cases, this will cause cooling fan blades and the cooling fan, collision or friction and noise. Of course quality doesn't generally excellent radiator cooling fan products, such as, 'YiRongChuan'. The noise of miniature dc cooling fan unit is the db { db} Noise, the method of measurement is to place it in less than 17 db deadened the noise of the room, cooling fan, one meter distance along the micro cooling fan rotation direction aim at the air inlet cooling fan, and is measured using A weighted way. Miniature spectrum characteristics of cooling fan noise is also very important, so also need to use spectrometer to record the micro cooling fan noise frequency distribution, general requirements micro cooling fan noise to small, and can't exist different sounds. Miniature dc cooling fan noise processing method. 1. According to own actual situation to choose suitable for use of the cooling fan specifications and parameters, not blind pursuit of speed. 2. On a regular basis to clean the cooling fan of dust and gas to reduce the friction between the cooling fan. 3. Select excellent quality products, the best is a brand, because the brand is the quality and after-sale protection, do not covet is cheap. 4, between the cooling fan and the fixed end mat, rubber sponge or cloth to reduce the cooling fan of high-speed rotating vibration caused by noise, and there are many methods, in which I can not tell one by one. The above is the cause of miniature dc cooling fan noise factors and some processing methods, hope to be of service, at the same time, thank you for your sharing.