Working Principle Of The In-car Temperature Sensor
The working principle of the outside temperature sensor is the same as that of the inside temperature sensor.
Sensors outside the car are generally installed in the front bumper or before the radiator, and are easily affected by the environment, so they are wrapped in an injection-molded resin case to avoid responding to sudden changes in temperature. This will enable it to accurately detect the average temperature outside the car. In addition, some models have anti-fake input circuits inside the air-conditioning computer
Input element of automatic air conditioner
①The temperature sensor inside and outside the car: It is a negative temperature coefficient thermistor sensor, used to sense the temperature inside and outside the car. When the temperature changes, the resistance changes, and the temperature signal is sent to the air-conditioning electronic control unit ECU.
②Evaporator temperature sensor: It detects the temperature of the air passing through the evaporator or the temperature change on the surface of the evaporator, and controls the coupling or disconnection of the electromagnetic clutch of the compressor. The signal is sent to the electronic control unit (ECU) to control the fan speed at low temperatures.
Features Of The In-car Temperature Sensor
【Application description】Measure the temperature change of the air conditioner;
[Assembly method] The wiring harness is tied and fixed.
● The temperature control response speed is fast.
● Good moisture and water resistance.
● The assembly method is simple and firm.
ABOUT THE CUSTOM
Temperature sensor customization can be roughly divided into: resistance, processing (tinning or connector connection)
1. Customized according to customer needs, common types refer to the following composition categories
| Composition category | 1 | 2 | 3 | 4 |
| Resistor | NTC thermistor | PT1000/PT100 platinum resistor | DS18B20 | Thermocouple |
| Package shell Stainless | steel shell (304, 316) | Nickel-plated copper shell | ABS shell | Injection molded shell |
| Wire parameters | Stainless steel mesh braided wire | Silicone wire/PVC wire | Glass fiber mica wire | Teflon wire |
| Tail connection | 2.5/3. 5mm headphone audio plug | Connector (customized on demand) | Plug terminal | Bare wire tinning |
2. Specific parameters are as follows
| Type name | Resistance parameters | Accuracy | Specification model | Temperature range |
| NTC thermistor (R value) | 5k, 10K, 50K, 100K | 1%, 2%, 3%, 5% | MF52, MF58 | -30℃~300℃ |
| NTC thermistor (B value) | 3435, 3470, 3950, 3970, 3977 |
| Platinum resistor | PT100/PT1000 | Grade A, Grade B | / | -50℃~500℃ |
| DS18B20 | DS18B20 | ±0.5% | / | -50℃~125℃ |
| Thermocouple | K type | Grade 1, Grade 2 | / | -50℃~60o℃ |
| Wire | / | / | AWG18/20/22/24/26/28 | 105℃-500℃ |
Product Tags:
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Refrigerator Air Conditioner Special Temperature Control Probe NTC10k 3435 Thermistor Temperature Sensor Temperature Images
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