Four kinds of flammable refrigerants, do you understand?

2019 - 05 - What are 20 flammable refrigerant? The following with together and see it! Use these four refrigerant must be vigilant! R32 refrigerant R32 is short for methylene fluoride, R32 colorless, tasteless, mild combustion ( A2 level) In the air combustion limit is 14% ~ 31%, meet the fire will burn. R32 refrigerant soluble in oil, poorly soluble in water. Ozone depleting ozeme depletion potential ODP is 0, global warming GWP coefficient values for 670. Pressure is higher than R22 is about 60%. Products need to be resistant to high pressure, also need to maintenance tools and equipment used in high voltage. Pressure with R410A, R32 and r410a thermal performance very close. R32 also has lower viscosity coefficient and high thermal conductivity. Although R32 advantages, R32 is inflammable, explosive refrigerant; Air-conditioning installation and maintenance is dangerous work, now plus R32 uncertainty, safety issues to consider. Need to pay attention! R32 refrigerants need pumping air into vacuum state, banned flame! R290 refrigerants R290 ( Propane) Also called cold coal, is a new kind of environmental protection refrigerants, mainly used for central air conditioning, heat pump air conditioner, air conditioning and other small household refrigeration equipment. R290 as a kind of hydrocarbon refrigerants, ODP value is 0, GWP value is less than 20, with R600a, everything & amp; Compared r404a, has prominent advantages on the cooling performance. Because of its features, flammable and explosive perfusion has been curbed, security level for A3. Attention! R290 to vacuum, air mixture can form explosive mixture, encounter heat and flame is in danger of burning explosion, open flame must be forbidden! R600a refrigerant R600a, isobutane, it is a new type of excellent hydrocarbon refrigerants, derived from natural ingredients, no damage to the ozone layer, without the greenhouse effect, green environmental protection. Characterized by a large latent heat of evaporation and cooling ability; The flow performance is good, delivery pressure is low, low power consumption, load temperature picks up speed. Compatible with all kinds of compressor oil. Colorless gas at room temperature, under pressure from its own colorless transparent liquid. R600a is mainly used to replace the refrigerant R12, now used for household refrigerator equipment. R600a is also a flammable gas, mixed with air to form explosive mixture, heat and flame is in danger of burning explosion. Contact with the oxidant violent reaction. Its vapor is heavier than air, can spread in the low to very far place, fire will fire back to combustion. Note: R600a content in the refrigeration system is insufficient, will cause the pressure value is too large, abnormal sound of machine, compressor shorten service life. R717( Ammonia) R717( Ammonia) Refrigerant, ammonia is medium temperature refrigerants, pure ammonia had no adverse effect on oil, but there is water, will reduce the refrigeration oil lubrication, pipe and valve parts in ammonia refrigeration systems are using copper and copper alloy. R717( Ammonia) Mature synthesis process, making is easy, the price is low, does not destroy the ozone layer, without the greenhouse effect. The refrigerating capacity over the unit volume R22; Latent heat of vaporization, refrigeration and heat release coefficient is high. Ammonia refrigerants in large cold storage cabinets, supermarket food has a wide range of applications. The stimulation of ammonia vapor colorless, has a strong smell. Ammonia has bigger toxicity to human body, when ammonia liquid splashes on the skin can cause frostbite. When the ammonia vapor in the air volume reached 0. 5 - 0. 6% when can cause explosion. So the concentration of ammonia in air in the room must not exceed 0. 02mg/L。 Ammonia is not easy to burn at room temperature, but when heated to 350 ℃, then decomposed into nitrogen and hydrogen, hydrogen to explode after mixed oxygen in the air.

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