Working principle of automobile air conditioner! How many sensors are there?
1 、 air conditioning pressure sensor:Generally installed in a dryer, used to detect liquid refrigerant flow through the expansion valve hydraulic pressure. Three lines: detect high pressure and low voltage. When the vehicle collision after the leakage of fluorine and compressor oil, compressor oil to prevent damage, once detected, low voltage, fast cut compressor power supply. When the high voltage is detected, the power of the compressor needs to be reduced so as not to waste work.2 、 air conditioning temperature sensor:Generally installed in the temperature inside the package, it can be said that the evaporator temperature sensor, when the temperature reached a certain level, you need to shut down the compressor, otherwise it will cool down, frosting, and finally forming ice jam.3 、 air conditioning compressor relayGenerally installed in the compressor, used to control the compressor start, stop, power switching and other functions.4. Other sensorsFor example, the liquid in a vaporizer changes into a gaseous state and, in its expansion, involves an excessive amount of refrigerant, which affects the absorption of heat. How not to overdose, check with a sensor. This is just an example, but how about the condensation effect of the condenser? Want to improve, OK, install sensors.As for the working principle of air conditioning, a lot of the network, to the sensor, not a few clear, after all, more difficult, the car update too fast, moving is the sensor.
Pressure switch, relay, expansion valve, temperature control
Are you going to say simple or elaborate? Simply put, an air conditioner is a system that can switch between hot and cold, noting that only hot and cold exchanges, and energy is conserved. How much cold is generated inside the car and how much heat is transferred outside the car. How do cold and hot come from? The three states transition (gas, liquid and solid) in the matter will absorb heat and release heat. The process of heat absorption will reduce the temperature and increase the temperature by the exothermic process. Said first air conditioning, first compressor (respectively, high and low pressure pipe joint), one-way valve, condenser (below are respectively connected with the high voltage), the evaporator, the fixed throttle valve (or expansion valve), high pressure refrigerant through the throttle valve after it turned into a low voltage part, completing the cycle in the low pressure pipe flow into the compressor. In the circulation process, the gaseous refrigerant in the compressor compressed into a liquid forced into the condenser, the process is exothermic, so the condenser becomes hot, so to the condenser with fan forced cooling, the liquid refrigerant pressure through the one-way valve into the evaporator, a throttle valve is the key device in the evaporator, evaporator is quite a big box, a throttle valve which is equivalent to a small opening in the box, since entering the condenser is high pressure refrigerant liquid, when the throttle valve opening hole quickly after release into the evaporator, the evaporator space is relatively large, the internal pressure is very low the liquid refrigerant flows, rapid gasification, this process is endothermic, so the evaporator will install a cooling fan in the evaporator side through the variable The cold evaporator becomes a blown cold air. This is the popular principle of air conditioning.
