How often is it appropriate to change the car refrigerant?

Summer is here? When you are ready to drive out, the moment you open the door, a warm current flies over, which feels sour and refreshing....It makes you 'wet' like a rain shower! What's more terrifying is...when you are ready to enjoy the coolness that the car air conditioner brings to you, but you find that the air conditioner is not cooling?

What is refrigerant? Refrigerant refers to the refrigerant in the automobile air-conditioning system, commonly known as refrigerant. It is used to transfer heat due to its rapid heat absorption and release characteristics during cooling work, so as to achieve the effect of rapid cooling. The English name of the refrigerant is refrigerant, so the first letter R is often used to represent the refrigerant, followed by the name of the refrigerant, such as R12, R22, R134a, etc. In the past, the commonly used refrigerant was R12 (also known as Freon). This refrigerant has good performance in all aspects, but it has a fatal disadvantage, which is the destruction of the atmospheric environment. It can destroy the ozone layer in the atmosphere. The sun's ultraviolet rays are directly irradiated to the earth, causing damage to plants and animals. my country has stopped the production of automotive air-conditioning systems that use R12 as a refrigerant. At present, the environmentally friendly refrigerant R134a is widely used in automobiles

In the daily car environment, friends often encounter such problems, so what can we do? What about predicting in advance? Don’t you think about adding refrigerant only when you “fire PP”, and you can’t make preparations early? Method 1: After the air conditioner is normally turned on for a period of time, the wind blowing on the body feels very cold and can quickly reach the set temperature. The outdoor compressor can work like a refrigerator for a while and stop for a while, which indicates that it is normal. Otherwise, refrigerant may be required. Method 2: Use a thermometer to measure the temperature difference between the inlet and outlet of the indoor unit. It is normal that the temperature difference is above 8°C. The larger the temperature difference, the better the working condition of the air conditioner, which can reach about 15°C. If the difference is less than 8°C, refrigerant may need to be added.

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