Conventional characteristics and applications of explosive refrigerants R32 and R290

Generally speaking, explosive refrigerants have certain drawbacks in transportation and application, and they are also one of the refrigerant models with a high degree of attention. The 32 refrigerants and R290A refrigerants that are currently being widely used are typical explosive refrigerants. Take a look at what characteristics they have, and understanding these will not be dangerous.

R290 (hydrocarbon refrigerant): product introduction and safe operation

Health hazards: simple asphyxia and anesthesia. Human short-term exposure to 1% propane does not cause symptoms; concentrations below 10% cause only mild dizziness; exposure to high concentrations can cause anesthesia and loss of consciousness; extremely high concentrations can cause suffocation.

Hazard characteristics: flammable gas, mixed with air can form an explosive mixture, and may burn and explode when exposed to heat sources and open flames.

The charge is small, the amount of R290 refrigerant is only 40%~55% of R22 and r410a, and the amount is less, which is more economical.

The freezing point is low, and the latent heat of evaporation is larger, which makes the temperature drop faster per unit time; the isentropic compression ratio is small, which makes the compressor work easier and prolongs the service life of the compressor; the molecular weight is small, and the fluidity Well, the delivery pressure is lower and the load on the compressor is reduced. Using R290 refrigerant, the energy saving rate can reach 15~35%.

The fatal flaw of R290 'flammable and explosive' is extremely lethal. R290 can form an explosive mixture when mixed with air, and may burn and explode when exposed to heat sources and open flames. This brings about the problems of production line and product safety. Under the mentality of 'don't be afraid of 10,000, just in case

The basic performance of R32 refrigerant

The alternative to R22 is R32, and the Ozone Depleting Potential (ODP) of R32 refrigerant is 0, global warming The coefficient value (GWP) is 0.11, and the working pressure is basically equivalent to that of R410A. Under the same cooling capacity, the charging capacity of R32 is only about two-thirds of that of R22. Compared with R290, R32 has only low flammability. Compared with R410A, R32's global warming coefficient is only about one-third of the former. These advantages make it one of the most potential R22 substitutes. . R32's energy-saving, green, and non-damaging ozone layer has also become one of the new refrigerants of modern refrigerants.

Therefore, pay more attention to the general characteristics and safe use of refrigerants. Remember not to use flammable and explosive refrigerants casually. Non-professionals should not add them by themselves. So as not to harm your own safety.

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