What are the parameters for evaluating the cooling capacity of the Mzada radiator fan?
We can choose a Mzada radiator fan to solve the heat problem, mainly from two parameters evaluation, one is the air volume of the Mzada radiator fan, one is the wind pressure, the same size of the axial flow type Mzada radiator fan has the air volume ratio turbine type Big, the pressure is just the opposite
Air volume refers to the total volume of air sent or inhaled by the air-cooled radiator fan per minute. If it is calculated in cubic feet, the unit is CFM. If it is calculated in cubic meters, it is CMM. The air volume unit used by radiator products is CFM.
Wind pressure is blocked by the building, so that the surrounding air is blocked, the dynamic pressure drops, and the static pressure rises. Local eddy currents are generated on the side and back, the static pressure drops, and the dynamic pressure rises. The increase and decrease of this static pressure is collectively referred to as wind pressure as compared with the undisturbed air flow in the distance. Simply speaking, the wind pressure is the pressure of the wind received by the plane perpendicular to the direction of the air flow.
For the characteristics of these two parameters, if the wind is used or the heat problem that needs strong wind power can be solved, we generally use the turbine type and the wind pressure is large. For the problem of heat dissipation in direct blowing, we generally use axial flow type and large air volume.
Mzada radiator fan with large power, large air volume and small current can be used. We often say that the power is large and the current is large, the air volume is large, and the current is small. Is the power small? In fact, it can be realized in a certain area.
We have recently made a 7025 12V DC fan. The current current of 4800 rpm is 0.43A. After changing the design, the speed is still 4800 rpm, the air volume is constant, the current is only 0.27A, and the power is nearly 40% smaller.
We will switch to energy-saving drive chips, using power-saving silicon steel sheets and thickened rotor magnetic strips, etc., in order to reduce the current of the Mzada radiator fan.
Some customers are buying a fan that is nominally a noiseless DC Mzada radiator, but it feels noisy when it comes back to the test. What is going on? Is the business doing something wrong?
First of all, we can analyze whether there is noise in the Mzada radiator fan unit. If the unit test is noise-free and there is noise on the product, it may be related to the product environment. It may be necessary to design the air duct, install the anti-resonance design of the product, etc.
Then, if we find that the single-unit power-on noise is also very large, we have to choose some relatively quiet fan blades, the blades are relatively long, so that the friction area of the fan blades is reduced with air.