Auto air-conditioning refrigerant pressure standard, how much is the standard of auto air-conditioning refrigerant pressure

As the weather gets hotter and hotter, people's hearts become more manic, especially drivers in confined and small spaces, just like in a steamer, but thanks to the car air conditioner. At present, automobile air conditioners are charged with a new environmentally friendly R134a refrigerant, which was used in the 1990s. Because chlorine-free molecules have no damaging effect on the ozone layer and have few changes to the automobile air conditioning system, it is recommended for use by relevant United Nations organizations. It is used in Guangdong and Hong Kong. Other places are called 'environmentally friendly refrigerants

Automobile air-conditioning refrigerant pressure standard-introduction The so-called automobile air-conditioning refrigerant is usually called Freon, which is also called 'refrigerant' or 'refrigerant' in the market , Divided into environmental protection (R134a) and non-environmental protection (mainly F12). The refrigerant pressure gauge is also called a refrigerant gauge or a fluorine gauge. It is used to measure the current pressure of the refrigeration system. It is mainly used to detect the pressure value of the refrigerant at different stages of the system, and the operating conditions of the user holding the equipment. At present, the accuracy requirement of the refrigerant pressure gauge in our country is 2.5. 1. When the compressor is 1500~2000rpm, it is normal that the high pressure (discharge pressure) is about 1.5~2.0 mpa, and the low pressure (suction pressure) is about 0.15~0.35 mpa. Specifically, it depends on the matching of the air conditioning systems of different vehicles and the ambient temperature. 2. Under idling conditions (engine 700~900rpm), if the ambient temperature is high, such as under direct sunlight in summer, the high pressure may be slightly higher, the highest can reach about 2.5~2.8 mpa, but generally it will not exceed 3.1 mp.

Auto air conditioning refrigerant pressure standard-how to judge whether refrigerant is added. Generally, cars do not need to add refrigerant for 3-5 years, but sometimes the cooling effect of refrigerant is not Jia also needs to be added. 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 be like a refrigerator. Work for a while and stop for a while, which shows that it is normal, otherwise there may be a need for refrigerant. Method 2: Use a thermometer to measure the temperature difference between the inlet and outlet of the indoor unit. If the difference is above 8°C, the normal temperature difference will be larger, indicating that the working condition of the air conditioner is as good as 15°C, and the difference is lower than 8°C. You may need to add refrigerant. Method 3: Turn on the indoor unit panel ten minutes after starting up, you should see that the copper tube of the evaporator is covered with aluminum fins for heat exchange, and the parts are evenly covered with condensed water. This is when the humidity of the normal air is high, and vice versa. If there is no half and half, there may be a lack of refrigerant. Such as partial frost or ice formation is also abnormal. Method 4: Users who have used for more than half a year can check whether there are obvious signs of oil leakage at the pipe joints of the indoor unit and the valve of the outdoor unit. If there is obvious oil leakage, it indicates that the machine is leaking, because the oil and fluorine are mutually miscible and the oil is leaking. Fluorine will leak, and fluoride will leak oil.

The pressure standard of automobile air-conditioning refrigerant-the amount of increase is appropriate. General cars indicate how many grams to add, 300 grams to more than 600 grams are available, generally three or four bottles of refrigeration There are also five or six bottles of the agent, mainly depending on the pressure gauge, the air conditioner is turned on, and the compressor is working, the high pressure is about 200, and the low pressure is about 20-30. If the refrigerant is sufficient, why does the air conditioner not cool? It may be: insufficient refrigerant, refrigerant leakage, non-condensable gas or too much refrigerant in the system, clogged liquid storage tank, dry gas filter, clogged expansion valve filter, excessive oil content in the system, and control valve failure (Variable displacement) There may be internal leakage or pipeline blockage.

Of course, everything has a degree, too much is not good, too little is not good, you have to grasp the standard. Not enough will result in poor cooling effect, and too much may cause the compressor to not work or be damaged. What if it really increases? You can take a chopstick or other things and poke it at the low pressure port to drain the excess refrigerant. The specific drain depends on your grasp. You can drain a little first to see if the compressor is working properly. If it is not working, Then drain again until the compressor can work normally.

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