Heat dissipation knowledge| 2022-11-23|毅荣川电子
In our daily life, we will contact the cooling fan and use it inCooling fanAt that time, people are more concerned about the fan life and what factors will affect the cooling effect. There are two factors that will affect the cooling effect of the cooling fan, that is, the air volume and pressure of the fan. What is the relationship between the air volume of the cooling fan and the air pressure of the cooling fan?
The air volume of the cooling fan refers to the product of the plane speed of the fan ventilation area. When the ventilation area is fixed, the larger the plane speed is, the greater the air volume of the cooling fan is. The greater the air volume of the cooling fan, the greater the heat absorption of the air. When the air moves and turns, it can take more heat away, and the cooling effect is better. The larger the fan diameter, the larger the fan area.
In order to stop the normal ventilation, the resistance of the cooling fan must be suppressed during the ventilation process. The cooling fan must generate cooling fan pressure to suppress supply air resistance. This pressure is the air pressure of the cooling fan. In order to achieve the purpose of cooling fan air supply, static pressure and dynamic pressure are required. Total pressure is the algebraic sum of static pressure and dynamic pressure. Total pressure refers to the total pressure increase value given by the cooling fan, i.e. the difference between the total pressure at the outlet and inlet of the cooling fan.
In practical application, the nominal air volume is not the actual air volume obtained by the fan hot plate, and strong ventilation capacity does not mean large air volume. When the air moves, the airflow meets the obstruction of fan thermal detector or elements in its path, and the resistance of these elements limits the free flow of air. In other words, when the air volume increases, the air pressure decreases.
Cooling fans will be used for common equipment in the plant. Due to the use environment, many equipment work in workshops with large dust and poor ventilation. If used for a long time, the equipment will accumulate a lot of debris and dust, which can not effectively dissipate heat. The application of cooling fan can solve these problems well, reduce the temperature and dust of furnace bottom equipment, enhance ventilation, and effectively extend the service life of equipment.
Usually when we use the computer, there is a cooling fan to stop the cooling of the computer CPU. This is a way to maintain the computer. Because the computer will generate heat during long-term use, if the heat cannot be dissipated in time, it will cause the CPU temperature to be too high and cause automatic shutdown or blue screen crash, thus affecting normal use. If it is serious, it will burn the CPU and increase the cost of maintenance parts.
The car will also be equipped with cooling fans. During the driving process of the car, mechanical energy will be converted into heat energy, which will increase the temperature in the car. In order to ensure that the parts in the vehicle are not burnt out, the cooling fan is required to stop cooling to ensure that the parts are free of problems at normal temperature.