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source:Industry News release time:2023-08-19 Hits: Popular:Infrared sensing module
NTC thermistors are semiconductor ceramic components with a very large negative temperature coefficient. They are mainly made of metal oxides such as manganese, cobalt, nickel, and are sintered at high temperatures. The resistance value changes with the ambient temperature or due to self heating generated by current, that is, under a certain measurement power, the resistance value decreases with the increase of temperature. By utilizing this feature, NTC thermistors can be measured to determine the corresponding temperature, thereby achieving the purpose of temperature detection and control.
The composition of a car temperature control system includes temperature sensors, control system ECU, etc. The temperature sensors include an external gas temperature sensor, an internal gas temperature sensor, and an evaporator temperature sensor.
The NTC thermistor is usually installed near the heat sink in the evaporator of a car air conditioner to detect the surrounding ambient temperature. When the surface temperature of the evaporator is lower than the set minimum temperature limit, the control compressor stops running. When the surface temperature of the evaporator is higher than the set maximum temperature limit, the compressor starts working. This precisely utilizes the characteristics of temperature sensors, where the resistance value decreases with increasing temperature. This can prevent the air conditioning pipes from freezing.
This NTC temperature sensor used in car air conditioning evaporators uses NTC resistance components, made of waterproof nickel plated copper shell probes and blue sheathed wires. The product has the characteristics of stable signal transmission, high accuracy, and high range. The product is a two core lead wire with a standard wire length of 1 meter, and can be customized.
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