According to the increase of heat around the fan, the speed of the fan itself is increased, and the flow of air (exhaust air volume) is increased at the same time. 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.
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 larger design temperature after the fan has been cranked up for several hours. Under normal circumstances, the cooling fan running at low speed is sufficient to do its job. However, it should also be considered when selecting and installing: First of all, the selected fan must be able to provide enough exhaust air volume (speed) to cool the hot air inside the equipment under high temperature conditions; when the temperature is relatively low and the hot air flow is compared Less often does the opposite. Secondly, when choosing the location of the sensor installation, you should pay attention to placing the sensor in an appropriate position, so that the sensor can be directly attached to the surface that needs to be cooled. In operation, a temperature-controlled fan will run at a faster speed if the thermistor senses a higher temperature, and at a lower speed when the temperature is lower; at these higher and lower In between, the fan speed will barely 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.