Several experienced automobile maintenance experts pointed out eight misunderstandings of using air conditioners to the majority of car owners. Myth 1 Clean the air conditioner when it doesn't work well. Some novices always wait until the air conditioner doesn't work well before thinking about cleaning it, which is wrong. Zhang Liwei, deputy director of the technical department of Beijing Sanyuanqiao Toyota Motor Sales and Service Center, pointed out that the air-conditioning filter element should be replaced regularly, because there are more dust and catkins flying in Beijing in spring, which will stick to the filter element, which is easy to breed bacteria and make the air conditioner have a musty smell, so it is best to replace it once a year after spring. In addition, the condenser should be cleaned regularly, and the water tank should be removed and thoroughly cleaned. Myth 2: The air outlet direction of air conditioner can be adjusted at will. Some car owners do not pay attention to adjusting the direction of air conditioning when using air conditioning, which is not conducive to achieving the best effect of air conditioning. Zhang Liwei pointed out that according to the principle that cold air sinks and hot air rises, the correct way should be to turn on the air outlet upwards and turn on the air outlet downwards when heating. Myth 3: Don't turn on the air conditioner all winter. Some areas are warmer in winter, and some car owners don't need air conditioning all winter. Zhang Dongdong, the master of Beijing Shouqi Toyota Automobile Sales & Service Co., Ltd., pointed out that not using air conditioner for a long time will lead to the aging of its rubber ring, and the lubricating oil on the internal parts of air conditioner will also dry out. Starting the air conditioner regularly can make the parts lubricated by lubricating oil and keep them in good condition, so it is best to start the air conditioner once a week in winter. Myth 4: Turn on the air conditioner for a long time. Some car owners often turn on the air conditioner after getting on the bus. Zhang Dongdong pointed out that using air conditioner for a long time will make the condenser pressure too high, which will cause losses to the refrigeration system. Therefore, it should not be too long to use the air conditioner every time. If the temperature inside the car has reached a comfortable temperature, you can turn off the air conditioner and turn it on later. Myth 5: Open the inner loop as soon as you get on the bus in summer. In hot summer, many car owners are used to turning on the internal circulation of the air conditioner as soon as they get on the bus, thinking that this can make the temperature inside the car drop faster. Li Jingxiang, chief engineer of Beijing COSCO Toyota Automobile Sales & Service Co., Ltd. pointed out that because the temperature inside the car is higher than that outside, the effect is not good. When you first enter the car, you should first open the window for ventilation and start the external circulation to exhaust all the hot air. After the temperature in the carriage drops, it is replaced by internal circulation. Myth 6: Open the internal circulation for a long time. Li Jingxiang pointed out that because the internal circulation is the circulation of air in the closed space of the car, the oxygen content in the car will continue to decline, and if the gasoline in the cylinder is not completely burned, the unburned carbon monoxide in the engine may leak into the car, so the air quality in the car will get worse and worse, and even cause harm to the human body. Therefore, it is necessary to open the internal circulation for a while, and then open the external circulation for a while to let fresh air enter the carriage. It's a truth that you can't sleep in the car with internal circulation on. Myth 7 Turn off the air conditioner first. Some car owners often think of turning off the air conditioner after turning it off. Li Jingxiang pointed out that this is harmful to the engine, because the next time the vehicle starts, the engine will start with the load of air conditioning. Such a high load will damage the engine. Therefore, after each stop, turn off the air conditioner first and then turn it off. The vehicle starts for two or three minutes, and then turn on the air conditioner after the engine is lubricated. Myth 8: Never use large air volume. Some car owners rarely or never turn on the air conditioner to get high air volume because they don't like the noise when the air conditioner is turned on to high gear. Li Jingxiang pointed out that the air conditioner will inhale a lot of dust when in use, and blowing strong wind regularly can blow out the floating dust on the inner surface of the air duct of the air conditioner, which is a simple method to keep the air conditioner clean. In addition, special air duct cleaning solution should be used for sterilization, cleaning and deodorization. ■ Linking fluoride to regular stores has been reported by car owners. When some small-displacement cars with air conditioners are driving at low speed, the speed will be fast and slow. Zhang Liwei said, don't worry too much about this, because air conditioning will increase the load of the engine, so this is normal. At this time, you can step on the accelerator a little. Zhang Dongdong reminds everyone that it is best to go to a regular 4S fluoride store. If you go to a small repair shop to add fluoride, you should pay attention to whether the maintenance personnel have filled it up. You can pay attention to the filler. After bubbles are generated, add 50-100g fluoride. In addition, you should pay attention to let the maintenance personnel check the leakage. Li Jingxiang reminded car owners that when some old cars turn on the air conditioner, the water temperature will reach 95- 105 degrees Celsius, and the air conditioner is not cold. At this time, the engine will wear and even explode, which may be due to poor water circulation and need to be overhauled.