Air -conditioning refrigerant, also known as refrigerant, is a working medium of refrigeration cycle. The phase change of refrigerant is used to transmit heat. The refrigerant absorbs heat when it is vaporized in the evaporator, and heats up when condensed in the condenser.There are more than 80 substances that can be used as refrigerants. The most commonly used is ammonia, fluorine, water and minority hydrocarbons.
Insufficient air -conditioning refrigerant
The common judgment methods of insufficient refrigerant in the air conditioner are: 1. Touching the bronchial valve by hand without obvious dryness.Once the fluorine is deficient, the boiling point of the refrigerant in the evaporator decreases, which increases the heat of the refrigerant of the valve and the temperature of the valve increases.2. Whether the liquid tube valve is frost.Once the fluoride is dehydrated, the pressure in the liquid tube decreases and the boiling point is reduced, causing the valve temperature to be lower than the freezing point.3. Open the indoor panel and remove the filter, and find that the evaporator can only be frost.This is the result of insufficient refrigerant and the corresponding reduction in the cooling area.4. The outdoor aircraft is not hot.The reason is that the refrigerant is insufficient, resulting in a decrease in condensation pressure and temperature.
Which air -conditioning refrigerant is good
R22 refrigerant is the most economical one for most civilians.
Types of air conditioning refrigeration agent
The refrigerant widely used in compressed refrigerant is ammonia, fluorine and hydrocarbons.According to chemical composition, refrigerant can be divided into five categories: inorganic compound refrigerant, fluorine, saturated hydrocarbon refrigerant, unsaturated hydrocarbon refrigerant, and co -boiled mixture refrigerant.
How to add air conditioning refrigerant
1. The air conditioner turning on the cooling mode is turned on to make the machine work normally 2. Open the small nut of the Dalian to take over the triangular valve (not the one with the inner hexagonal filament holes on the side) 3.On the top (the yellow tube is connected to the cold tank; the blue pipe is connected to the low -pressure thick tube; the red pipe is connected to the high -pressure fine tube), connect the refrigerant steel bottle valve, and the liquid section (with pressure gauge), Open the surface, add liquid to the other end with a hydraulic hose to connect the thick pipe valve on the air -conditioning outdoor unit, add liquid tattoos, release the steel bottle valve joints and release some gas (exhaust air) and then tighten.4.5-5.5MPa.
How much is air -conditioning refrigerant
The price of air -conditioning refrigerant is 256.5 yuan a barrel. When the air conditioner is used for refrigeration, the low -temperature and low -pressure refrigerant gas is inhaled after being inhaled by the compressor to become a high -temperature and high -pressure refrigerant gas refrigerant jar.The condenser (generally air conditioner is air -cooled, that is, the cooling copper pipe of the outdoor machine) in the outdoor heat exchanger, becoming a medium temperature and high -pressure liquid (the heat is taken away by the outdoor circulation air), the medium temperature high -pressure liquid is then expanded by the capillary tube expansionAfter the pressure, it becomes a low -temperature and low -pressure liquid.

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