In our driving life, car air conditioning plays a vital role. It is like a silent guardian elf, bringing us coolness in summer and warmth in winter.

1. The importance of car air conditioning
Guarantee of comfortable driving: Whether in the hot summer or the cold winter, car air conditioning can create a suitable temperature environment for the car. In hot weather, it can quickly lower the temperature in the car, keep us away from stuffiness and irritability, and keep us refreshed and comfortable. On cold days, it can send warm airflow to drive away the cold, making our driving journey full of warmth.
Improve driving safety: The appropriate temperature in the car helps the driver maintain a good mental state and concentration. Overheated or overcooled environments may make people feel tired and irritable, thus affecting driving safety. The existence of car air conditioning creates a comfortable driving environment for us, greatly reducing the driving risks caused by temperature discomfort.
Protect the equipment in the car: Extreme temperatures have certain damage to the electronic equipment and interior decoration in the car. Car air conditioning can adjust the temperature in the car to avoid damage to these equipment caused by high or low temperatures and extend the service life of the vehicle.

2. Working principle of automobile air conditioner
Automobile air conditioner is mainly composed of compressor, condenser, evaporator, expansion valve and other components. Its working principle is to compress the refrigerant into high-temperature and high-pressure gas through the compressor, and then send it to the condenser to dissipate heat, so that it becomes high-pressure liquid. After the high-pressure liquid is reduced in pressure by the expansion valve, it enters the evaporator, absorbs the heat in the car in the evaporator, becomes low-temperature and low-pressure gas, and then is sucked by the compressor, and so on. The cycle is repeated to achieve the purpose of cooling or heating.

3. The difference between traditional automobile air conditioners and parking air conditioners
Traditional automobile air conditioners can work normally during vehicle driving, but when the vehicle is turned off and parked, it cannot continue to provide a comfortable temperature environment in the car. Parking air conditioners are different. They are specially designed for vehicles in the parked state and can run for a long time after the vehicle is turned off.
The emergence of parking air conditioners provides great convenience for drivers who need to rest and wait in the parked state. For example, long-distance truck drivers can have a comfortable sleeping environment in hot summer or cold winter when they stop at a rest stop.

4. Advantages of parking air conditioners
Independent operation: Parking air conditioners do not rely on the vehicle engine and usually have their own independent power supply system. They can continue to work after the vehicle is turned off, without consuming the power of the vehicle battery or causing additional burden on the engine.
Energy saving and environmental protection: Due to its independent operation mode, parking air conditioners are more energy-saving and environmentally friendly than traditional car air conditioners when parked. It can adjust the power as needed to avoid unnecessary energy waste.
Comfortable and convenient: Parking air conditioners can provide a stable temperature in the car, allowing drivers to enjoy a comfortable environment when parking and resting. At the same time, some parking air conditioners are also equipped with intelligent control systems, which can be remotely operated through mobile phone APP, which is convenient and fast.

5. Tips for using car air conditioners
Reasonable temperature setting: The temperature in summer should not be set too low, generally around 25℃; the temperature in winter should not be too high, so as to avoid a large temperature difference between the car and the outside world, causing physical discomfort. At the same time, be careful to avoid frequent temperature adjustments to avoid affecting the stability of the air conditioning system.
Regular cleaning and maintenance: During the use of car air conditioners, dust, bacteria and other impurities will accumulate. Regular cleaning of air conditioning filters, evaporators and other components can ensure the cleanliness of the air and improve the cooling or heating effect of the air conditioner. In addition, the pressure of the refrigerant should be checked regularly to ensure the normal operation of the air conditioning system.
Correct use of internal and external circulation: When driving on urban roads, you can use internal circulation to prevent dirty air from entering the car; when driving at high speed or in good air conditions, you can use external circulation appropriately to keep the air in the car fresh.
Avoid using traditional car air conditioners for a long time when parking: Using traditional car air conditioners for a long time when parking will consume battery power and may even cause the engine to overheat. If you need to use air conditioning when parking, it is best to choose parking air conditioners, which can provide a comfortable temperature in the car without affecting the performance of the vehicle.

6. Summary
Car air conditioning is an indispensable part of our driving life. It brings us a comfortable driving experience, improves driving safety, and protects the equipment in the car. The emergence of parking air conditioners provides us with a new comfortable choice when parking. The correct use and maintenance of car air conditioners can not only allow us to enjoy a better driving time, but also extend the service life of the air conditioning system and escort our travel.