What refrigerant to choose for car air conditioners?

There are currently two main types of refrigerants for automobile air conditioning, one is R12 and the other is 134a (HFC-134a). R12 has a long history and is commonly used, but chlorine molecules in the gas will destroy the ozone layer in the atmosphere. Leading to the greenhouse effect, so a few years ago, representatives of various countries in the world gathered in Montreal to sign the protocol, stipulating that the production and use of freon products should be stopped in recent years, of which R12 bears the brunt. R134a is a variety that began to be used in the 1990s. Since it does not contain chlorine molecules, it has no damaging effect on the ozone layer and has fewer changes to the car air-conditioning system. It is recommended by relevant United Nations organizations and is called 'environmental protection refrigerant' in Guangdong, Hong Kong and other places. 134a refrigerant is now used in many air-conditioning systems of new cars at home and abroad.

1. How often does the car air-conditioning refrigerant need to be replaced?

The use environment of the vehicle is more complicated, and the air-conditioning system will accumulate a lot of mold and produce peculiar smell. The maintenance of the air conditioner is necessary. Therefore, it is recommended that twice a year is more appropriate, respectively in late spring and early summer and late autumn and early winter, and it is better to clean or replace the air conditioner filter at the same time.

2. How to choose refrigerant?

Answer: Choosing non-professional refrigerant will significantly reduce the life of the compressor. The original gold refrigerant is used, which can protect the compressor well.

3. Harm of low-quality automobile air-conditioning refrigerants

A: Inferior automobile air-conditioning refrigerants will damage the entire automobile air-conditioning system:

Some fake and low-quality automobile air-conditioning refrigerants are refined from coal gas, which are easy to catch fire and cause explosion. In addition, because low-quality refrigerant contains fluorine, it pollutes the environment greatly. At the same time, low-quality refrigerant contains chemical components that will corrode the air-conditioning hose of the car, cause leakage, and block the expansion valve in it, causing the air conditioner to not cool, thereby damaging the compressor, and damaging the entire automobile air-conditioning system. The low-quality refrigerant containing impurities is not compatible with the compressor lubricating oil, which directly affects the lubrication effect. Long-term use will cause the compressor to lose its lubrication function and damage the compressor.

B: Inferior car air-conditioning refrigerant is too pitted:

How much does it cost to use inferior refrigerant to damage auto parts? Repair it? If the air-conditioning hose is aging, it is easy to leak. If you want to replace the hose, the original factory will cost 400 or 500 yuan, and the higher-end model will cost 1,000 yuan. If the compressor is damaged, it depends on different models. If it is a Japanese car of 150,000 yuan, it will cost at least 5,000-8,000 yuan to repair the compressor. The cost of replacing compressors in high-end vehicles can even reach 30,000 to 50,000 yuan. If the car has been added with low-quality refrigerant, it is recommended that the owner replace it as soon as possible. If the low-quality refrigerant is not added for a long time, it may not be a big problem. If it takes more than one month, it may seriously damage the machine.

C: So how should the car owner distinguish to protect his car from damage?

In fact, there are several methods for everyone to test:

One look at the packaging: if the printing fails, it is definitely not produced by the original factory;

Second look at the brand: car owners are better to choose the original refrigerant with stable quality and smaller maintenance There are many miscellaneous stores, so you need to pay attention to whether there are counterfeit refrigerants;

The third thing is to look at the price: don’t be greedy for cheap goods, and it’s best to buy refrigerants above 50 yuan. It can be distinguished from the price. Different weights and different manufacturers have different prices. Now there are 200g, 250g, and 300g types on the market. Taking 300g as an example, the price of unknown manufacturers is between 16 yuan and 19 yuan. In the meantime, quality-guaranteed manufacturers cost 50-60 yuan a bottle, and original brand refrigerants cost 100 yuan/bottle. He also urged car owners to choose brands with quality assurance as much as possible.

Fourth, it depends on fuel consumption: Generally, after the real refrigerant is added, the temperature in the car can quickly drop by 2 degrees, the sound of the air conditioner will be smaller, and the lubrication effect will be better. A good refrigerant can have a lubricating effect, the noise of the air conditioner will be less, and theoretically, the fuel consumption will be less. Usually when the air conditioner is turned on, the fuel consumption of the compressor will increase by 5%-8%. Because of the lubrication, the fuel consumption is relatively low.

Fifth, it depends on the appearance: distinguish true from false. There are actually some methods in the industry: due to manufacturing technology and cost considerations, fake refrigerants generally have gaps between the cylinders of the outer tank, while real refrigerants are seamless. Yes, this method of identification is the simplest and easiest.

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