What is car thermostat bending
The bending of the automobile thermostat is the phenomenon that the thermostat deforms under the influence of thermal expansion and contraction. Thermostats are usually made of thin sheets of metal. When heated, the sheet of metal will be bent by heat. This bending is transmitted to the contacts of the thermostat by heat conduction, thus producing a stable temperature .
How a thermostat works
The thermostat uses an electric heating element to heat the metal sheet, causing it to be heated and bent. This bending is transmitted by heat conduction to the thermostat's contacts, resulting in a stable temperature output. This phenomenon of bending under heat is known as the "specific heat effect", which is the natural expansion and contraction of a material during heating or cooling .
Type of thermostat
There are three main forms of automotive thermostats: bellows, bimetal sheets and thermistor . Each type of thermostat has its specific working principles and application scenarios:
Bellows : The temperature is controlled by the deformation of the bellows when the temperature changes.
bimetallic sheet : using a combination of two metal sheets with different thermal expansion coefficients, the circuit is controlled by bending when the temperature changes.
thermistor : The resistance value changes with the temperature to control the circuit on and off.
Application scenario of thermostat
Thermostat is widely used in automobile air conditioning system, the main function is to sense the evaporator surface temperature, so as to control the compressor opening and closing. When the temperature inside the car reaches a preset value, the thermostat will start the compressor to ensure that the air flows smoothly through the evaporator to avoid frost; When the temperature drops, the thermostat turns off the compressor, keeping the temperature inside the car balanced .
The function of the thermostat is to switch the circulation path of the coolant. Most cars use water-cooled engines, which dissipate heat through the continuous circulation of coolant in the engine. The coolant in the engine has two circulation paths, one is a large cycle and one is a small cycle.
When the engine just starts, the coolant circulation is small, and the coolant will not dissipate heat through the radiator, which is conducive to the rapid warming of the engine. When the engine reaches the normal operating temperature, the coolant will be circulated and dissipated through the radiator. The thermostat can switch the cycle path according to the temperature of the coolant, thus improving the efficiency of the engine.
When the engine starts, if the coolant has been circulating, it will lead to a gradual increase in engine temperature, and the power of the engine will be relatively weak and the fuel consumption will be higher. And a small range of circulating coolant can improve the engine temperature rise rate.
If the thermostat is damaged, the engine water temperature may be too high. Because the coolant may remain in small circulation and not dissipate heat through the radiator, the water temperature will rise.
In short, the role of the thermostat is to control the circulation path of the coolant, thereby improving the efficiency of the engine and avoiding excessive water temperature. If you are experiencing vehicle problems, consider checking that the thermostat is working properly.
If you want to know more, keep reading the other articles on this site!
Please call us if you need such products.
Zhuo Meng Shanghai Auto Co., Ltd. is committed to selling MG&750 auto parts welcome to buy.
