Classification of cooling fans: According to the direction of airflow: axial flow fan and centrifugal fan; According to the purpose, it is divided into: exhaust fan, air conditioner fan, roof fan; The number of pressurizations for the airflow: single-stage pressurized fan, two-stage pressurized fan and multi-stage pressurized fan; According to the designed structure and installation position: press-in fan and draw-out fan. How to choose the cooling fan: Rotating speed: Under normal circumstances, it can be said that the size of the rotating speed determines the amount of airflow of the cooling fan. Of course, the greater the rotating speed, the greater the noise and vibration will be. Therefore, when the air volume is sufficient for the product to dissipate heat, the low-turn should be used as much as possible. Fan, Xinhuarui speed is generally divided into X ultra low speed, L low speed, M medium speed, H high speed, U super high speed. If it is a PWM speed control fan, it can be tested by the monitoring software that comes with the motherboard, or it can pass the tachometer. Bearings: There are many years before the bearing of the cooling fan. Now more and more cooling fan manufacturers are not using oil-bearing bearings, unless it is a small cooling fan, can not be used with bearings, because oil-bearing bearings The service life is too short and the noise is large in the later stage and cannot be compared with the roller bearing. Ball bearing systems have proven to be characterized by high efficiency and low heat generation. The ball bearing is rolling friction, rolling by metal beads, the contact surface is small, and the friction coefficient is small; while the oil bearing is sliding friction, the contact surface is large, after long-term use, the oil will volatilize, the bearing is easy to wear, the friction coefficient is large, and the noise is relatively late. , short life. In addition to high ventilation and high wind pressure, the quality of the fan is also very important. The bearing form used by the fan is very important here. The oil-containing bearing used in the fan is made of copper-based powder. The oil-containing bearing needs to be lubricated to reduce the sliding friction. The lubricating oil is made of lithium-based grease and special oil. With long-term operation, the oil in the bearing will volatilize and dry out, the friction coefficient will increase, the fan operation will be affected, and abnormal sound may occur, and the rotation speed may be slow or even not. The ball bearing replaces the sliding friction by rolling friction, and the friction coefficient is small and overcomes the disadvantage that the friction coefficient is easy to change, so the running stability is strong and the life is relatively long. There are various types of cooling fans on the market, and the cooling fan has the most important two points of speed and bearings. When we choose the cooling fan, we must clearly see these two points and indicators, to understand the performance and The advantage is to choose the cooling fan that is satisfactory. Recommend Vape,Disposable Vape,Electronic Cigarette,Puff Bar Disposable Vape Guangzhou Yunge Tianhong Electronic Technology Co., Ltd , https://www.e-cigarettesfactory.com
What is a cooling fan? Classification and selection methods of cooling fans?
What is a cooling fan? The cooling fan is also called the cooling fan. The use of the cooling fan in life and industry is very common. The cooling fan refers to reducing the generation of indoor heat energy when the electrical appliance is used. Widely used in computers, communication products, optoelectronic products, consumer electronics, automotive electronics, switches, medical equipment, heaters, air conditioners, inverters, teller machines, car refrigerators, welding machines, induction cookers, audio equipment, environmental protection equipment, Traditional or modern instruments such as refrigeration equipment.