国产激情久久久久久一级A片老师,成人18岁在线观看,国产精品久久久久久久日韩 ,91好吊色国产欧美日韩在线

How to choose a good quality DC fan?

As machines become more and more automated, DC fans are used more and more widely in our lives. This is also the main reason for the rapid development of the DC fan industry. Then among so many suppliers, how do we choose a good one? What about DC fans? Let's learn about it with the DC fan manufacturer-Ruiapple.

1. Bearing selection: Generally, the bearings of DC fans are divided into two categories, one is the ball type, collectively referred to as ball bearings. There is also oil-containing bearings, collectively referred to as oil-impregnated bearings. Their difference lies in the long service life of ball bearings and low noise, but the price is very expensive. The service life of oil-impregnated bearings is 1/4 shorter than that of ball bearings. Some noise may occur after more than a year of use, but the price is cheap.

2. Choose from the appearance: From the outer surface, it should be thicker overall, with good material and purer color. There are no burrs on the edges of the frame leaves. Look at the thickness of the fan blades. If it is too thin, it is easy to break. There is not much deformation.

3. Listen to the wind, there may be electromagnetic sound when the speed is too high, if there are other sounds, it means that the quality is not very good. If the speed of the DC fan is not very high, like a 7cm fan, the speed does not exceed 3500RPM, the loud wind during the test indicates that the quality of the fan is average.

4. Look at the parameters on the outer packaging: The following two parameters are now provided for your reference. Voltage: 5V 12V 24V 48V Current: The operating current is generally less than 250mA, and the higher the speed, the smaller the operating current, the more energy-saving.

Well, that's all for today's content introduction. For more knowledge about cooling fans, welcome to consult Ruiapple. There are professionals here to solve your doubts.

Shenzhen Ruiapple Electronics Co., Ltd. is a professional fan manufacturer with 20 years of R&D, production and sales experience. Main business: cooling fan, DC fan, AC fan, silent fan, centrifugal fan, blower and other full range of heat dissipation and ventilation products as an integrity enterprise, the series of cooling fan products have obtained UL, CUL, CE, CCC, ROHS, etc. International Certification.

Shenzhen Ruiapple Electronics Co., Ltd. was established in 2000. For 20 years, it has focused on R&D, manufacturing and sales of DC AXIAL FAN, AC AXIAL FAN, CENTRIFUGAL FAN, and blower ( BLOWER), AC to DC fan (EC FAN), DC motor (DC MOTOR), AC to DC (EC MOTOR) motor and other full series of heat dissipation and ventilation products as an integrity enterprise.