Air volume refers to the total volume of air discharged or incorporated by the cooling fan per minute. If it is calculated in cubic feet, the unit of air volume is CFM. In cubic meters, that's CMM. The air volume unit often used by cooling fans is CFM.

Air volume is the most important indicator to measure the heat dissipation capability of heat dissipation fans. Obviously, the greater the air volume, the higher the heat dissipation capacity of the cooling fan. This is because air has a certain heat capacity ratio, and a larger volume of air, which means more air per unit time, carries more heat. So what factors will affect the air volume of the cooling fan?

1. Fan speed. The fan speed refers to the number of rotation times of the fan blades per minute. The unit is rpm. The fan speed is determined by the number of turns of the coil in the motor, the working voltage, the number of fan blades, the inclination Angle, the height, the diameter and the bearing system. Fast speed, that is, the fan out of the air volume is larger, in the case of not considering other factors, fast fan can better heat dissipation, but its disadvantage is also obvious, that is, will shorten the service life. Of course, it is also related to fan bearings. If it is an oil-bearing, too high speed is not necessarily a good thing, and ball bearings can achieve a higher speed.

2. Fan size. In fact, the wind speed and pressure of the same size fan are inversely proportional. The faster the wind speed, the greater the amount of wind, the smaller the wind pressure accordingly, so that the wind can not completely blow to the bottom of the radiator, so that the heat will accumulate at the bottom, so that the cooling effect is weakened. Therefore, if you need to increase the air volume and pressure of the fan at the same time, the only way is to increase the size of the fan. However, increasing the size of the fan brings with it a series of problems, such as being overweight. Therefore, we should not blindly pursue high speed, we should choose the most suitable cooling fan for their products according to the specific requirements of customers.

Guangdong Chungfo Electronic Technology Co., Ltd. focuses on the cooling needs of equipment in various industries. We are a cooling fan manufacturer specializing in R&D and supply of DC cooling fans, AC cooling fans and DC blower fans, etc. The product quality is excellent, the cooling fan gauge is complete, and the professional customization of cooling fans can be provided according to customer needs.