Automobile is a highly integrated mobile transportation tool. The long-term operation of the vehicle will cause a sharp increase in the heat inside the machine. If it cannot be effectively eliminated, there will be serious and irreversible consequences, which will directly affect the normal use of the vehicle. Therefore, it is necessary to equip the vehicle with professional and reliable automobile cooling fan. How to choose durable automotive fan with high quality? The motor cooling fan supplier can provide professional performance and reliable quality. It is worthy of consideration.
The water temperature sensor of the electronic cooling fan is a negative temperature coefficient sensor, that is to say, the higher the temperature is, the lower the resistance will be. We can do a small experiment to verify it. Connect all aspects of the water temperature sensor, adjust to the resistance gear, put the water temperature sensor in a cup, and then continuously add hot water to the cup. During the process, the resistance value decreases with the increase of water temperature.
As a kind of automobile cooling fan, the purpose of automobile electronic cooling fan is to control the water temperature of the engine to a normal level. It is composed of sensor, electronic fan and chip. The water temperature generally exceeds 90 degrees. When the sensor acts, the electronic fan turns on to reduce the water temperature. When the temperature is lower in winter, the water temperature is also lower. The electronic fan does not turn on to protect the engine from supercooling and overheating. The automobile electronic cooling fan is controlled by the temperature controller. When the water temperature rises to the upper limit, the temperature controller turns on the power and the fan starts to work. When the water temperature drops to the lower limit, the temperature controller turns off the power and the fan stops working.
The speed of the automotive electronic cooling fan is "only" controlled by the thermal sensitivity switch (F18), which has two gears and is installed on the water tank to detect the water temperature. It sends two signals to J293 which then turns on different open circuits to control the high and low speed of the electronic fan. When the air conditioner is turned on, both fans should rotate. However, it should be noted that air conditioner and electronic fan are two relatively independent systems controlled by two computers, named J301 (air conditioner) and J293 (electronic fan). J301 just gives a signal to J293 to force two electronic fans to start rotation.
When the motor of electric fan works, the current is large and the requirements for the wires used are high. When the electric fan works, it rotates at a high speed and the requirements for the manufacturing process are high.