Precautions for selection and installation of temperature-controlled cooling fans

       The temperature-controlled cooling fan increases the speed of the fan itself according to the increase of heat around the fan, and at the same time increases the flow of air. Thermostatic fans use a thermistor to sense temperature, and a sensor mounted on the fan hub detects the temperature passing through the fan. In this configuration, the fan must be properly installed, and the thermistor can sense through a special connecting wire when the fan is installed. Cooling fan operation varies with heat, and at slower speeds, the fan will produce less noise and consume less energy.

       In most design requirements, the air temperature is usually lower than the maximum design temperature after the fan has been cranked up for several hours. Under normal circumstances, the cooling fan running at low speed is enough to do its job. However, it should also be considered when selecting and installing: First, the selected cooling fan must be able to provide sufficient exhaust air volume (speed) to cool the hot air inside the equipment under high temperature conditions; when the temperature is relatively low and hot air flow Less often it does the opposite.

       Secondly, when choosing the installation location of the sensor, you should pay attention to placing the sensor in an appropriate position, so that the sensor can be directly clamped on the surface that needs to be cooled. In operation, if the thermistor feels warmer, it will run at a faster speed; when it is cooler, it will run at a lower speed; in between these higher and lower, the fan speed will be almost Does not change with temperature. When the temperature of the fan changes slowly, the speed of the fan also changes slowly, without sudden changes in the speed and noise of the fan. The length of the response time depends mainly on the sensitivity of its sensor to thermal induction.