Application of pressure sensor in automobile air-conditioning system

Car air conditioning is the abbreviation of car air conditioning (Air Conditioning, A/C), and its meaning refers to the use of artificial cooling and heating methods in a closed space to adjust and control the temperature, humidity, flow rate and cleanliness of the air .

According to the usual classification methods in the industry, traditional car air-conditioning systems can be divided into manual air-conditioning, electric air-conditioning, and automatic air-conditioning. No matter which type of air-conditioning control system, pressure sensors are inseparable.

The pressure sensor in the automobile air conditioner is located on the high-pressure pipeline between the compressor and the condenser in the engine compartment. It detects the amount of refrigerant and the working condition of the compressor according to the pressure of the refrigerant, and cooperates with the temperature sensor to jointly control the operation and shutdown of the air-conditioning system.

In this process, the pressure sensor plays a role in controlling the radiator fan, controlling the compressor, and detecting refrigerant leakage.

The pressure sensor can be used to monitor the pressure of the refrigerant in the high-pressure pipeline of the refrigeration system in real time, thereby protecting the components of the refrigeration system. When the refrigerant pressure is high, the capacity of the capacitor is small, and when the pressure is low, the capacity of the capacitor is large. The sensor detects this change and converts it into a circuit change signal to express the leak detection result in a digital or sound or electronic signal.

However, this method can only "qualitatively" know whether the system is leaking and cannot accurately find the leak point.

In fact, most key systems in vehicles rely on pressure sensors to measure and monitor key parameters to improve our driving experience, improve safety and reduce pollution.

In recent years, the pressure sensor has many innovations in detecting early failures of hydraulic brakes, optimizing the fuel mixture to adapt to the air pressure, automatically cleaning the exhaust filter, ensuring the sealing of the catalytic converter, monitoring the exhaust gas recirculation, and preventing the door from getting fingers application. Moreover, the automotive market is one of the largest markets for pressure sensors, with various methods of use, which are essential to modern driving experience.

In addition, the pressure sensor is also the most commonly used sensor in industrial practice. It is widely used in various industrial automation environments, including water conservancy and hydropower, railway transportation, intelligent buildings, production automation, aerospace, military, petrochemical, oil wells, and electric power. , Ships, machine tools, pipelines and many other industries.