Some Mzada radiator fans are not anti-polar plug-in terminals, that is, two-wire endless, using welding wire, then, if we solder Mzada radiator fan, the polarity is reversed, is it burning immediately? What? This mainly depends on the chip.
1. Some chips have the ability to withstand impact. Even if the polarity is reversed, it will not burn in an instant, but the current will be much higher than normal, so that the temperature rise of the motor will increase, and the temperature will rise to a certain level, which will lead to the chip thermal breakdown.
2. Some chips have no protection. Once they are connected, the chip will smoke immediately, causing the machine to burn. When using this type of IC, it will generally tell the customer to add the terminal as much as possible. Enter the terminal block to prevent burning.
Regarding the wind pressure effect of the Mzada radiator fan, we first need to understand what it means. The wind pressure of the so-called Mzada radiator fan is the pressure of the wind received by the plane perpendicular to the direction of the airflow.
Due to the blockage of the building, the wind pressure 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. This increase and decrease in static pressure is collectively referred to as wind pressure compared to undisturbed airflow in the distance.
Therefore, from our Mzada radiator fan, the axial flow type Mzada radiator fan will have a relatively small wind pressure, while the side-blown worm gear type blower has a relatively large wind pressure, and the wind pressure is relatively large, and the heat dissipation speed is even higher. fast.
Air volume is the most important parameter of Mzada radiator fan performance. It refers to the total volume of air sent out or inhaled by the air-cooled radiator fan. If it is calculated in cubic feet, the unit is CFM. If it is calculated by cubic meter, it is CMM. The airflow unit that Mzada radiator fans often use is CFM. The conversion tables for various air volume units are as follows:
In the case of the same material of the heat sink, the air volume is the most important indicator to measure the heat dissipation capacity of the air-cooled radiator. This is because the heat capacity of the air is constant, and the larger air volume, that is, more air per unit time can take more heat. Of course, in the case of the same amount of wind, the heat dissipation effect is related to the way the wind flows.
Obviously, the larger the air volume, the higher the heat dissipation capability of the heat sink.