Are refrigerators harmful to people, and are air conditioning refrigerants harmful to humans?

It is very harmful, and the fluorine-free ones are also harmful, and the fluorine-free ones are just a potion that does not destroy the atmospheric dust. Refrigerant is the common name of air conditioning refrigerant, also known as equipment portable refrigerant (refrigerant) At present, most cars (mainly referring to civilian cars) use two types of refrigerant: R-12 refrigerant and R-134A refrigerant. R-12 refrigerant is an ordinary refrigerant that contains chlorine, a substance that destroys the ozone layer, and can produce substances that are harmful to the human body under an open flame; R-134A is a new type of environmentally friendly refrigerant, which has the properties of non-toxic, colorless, non-flammable and non-explosive, good thermal stability, and more importantly, R-134A refrigerant is chlorine-free and does not damage the ozone layer.

The chemical structure of these two refrigerants is different from each other, so they are not common in automobiles. And the refrigeration oil they use with them is also not miscible. If the wrong refrigerant is added, the system will be damaged, such as corrosion of the hose.

The reason why R134A is used to replace R12 is because its thermal properties are similar to R12, it is a chlorine-free freon, and its ozone depleting effect is zero, HFC-134A is a new environmentally friendly refrigerant, chemical name: 1,1,1,2-tetrafluoroethane, molecular formula: CH2FCF3, with non-toxic, colorless, non-flammable, non-explosive, good thermal stability, etc., chemical stability, compared with CFC-12 (Freon), its ozone depletion index (ODP) is 0, The refrigeration capacity is comparable, the boiling point, and is an ideal substitute for Freon.

Therefore, the current new cars have basically used R134A, which is often referred to as environmentally friendly refrigerant.

In everyone's impression that freon damage to the atmosphere is very serious, since the 30s of the last century, the enlightened town of Xiaoxiao freon began to commercialize, and began to destroy the earth's ozone layer, to this day, air conditioners, refrigerators are still using freon?

The answer is yes, freon is still used in refrigerants.

Air conditioning. If the freon contamination is so bad, why continue to use it? There is a misunderstanding in this, Freon, also known as Freon, is a trademark of DuPont, Freon is a general term for halogenated hydrocarbons of saturated hydrocarbons (mainly methane, ethane and propane), there are multiple versions such as R12, R22, R401A, etc.

The first freon used was R12 (dichlorodifluoromethane), which is indeed the main culprit of the hole in the ozone layer. On January 1, 2010, it was completely banned.

Dichlorodifluoromethane.

At present, most of the refrigerants are used R22 (difluorochloromethane), which will not pollute the atmosphere, so the current mainstream refrigerants are R22, but there is also a problem that R22 leaks into the atmosphere and causes the greenhouse effect, so it will be banned in 2040 according to the Montreal Protocol.

Difluorochloromethane.

At present, some factories have begun to use R401A (difluorochloromethane, chlorotetrafluoroethane, 1,1-difluoroethane ternary mixture), this kind of refrigerant has been shown to neither destroy the atmospheric ozone layer, nor produce the greenhouse effect, and the future refrigerant will mainly use R401A.

1,1-Difluoroethane.

Difluorochloromethane.

Monochlorotetrafluoroethane.

Through the above brief introduction, you basically have an understanding of what kind of chemical substance Freon is, and you can take a look at what type of refrigerant is currently used in air conditioners and refrigerators.

Refrigerant: (The following is a refrigerant and refrigerant collectively referred to as refrigerant).

In the refrigeration and air conditioning system, it is used to transfer heat energy and produce a working fluid for the freezing effect. According to the working mode, it can be divided into primary refrigerant and secondary refrigerant. According to the classification of material properties, it can be divided into natural (natural) refrigerant and synthetic (synthetic) refrigerant.

Ideal refrigerant: non-toxic, non-corrosive, non-corrosive to metals and non-metals, non-combustion, easy to detect leakage, chemically stable, non-destructive to lubricating oil, with relatively latent heat of evaporation, harmless to the environment.

Ideal physical properties of refrigerants.

1.The evaporation pressure should be high.

The evaporation temperature will vary with the application temperature, for example, the evaporation temperature of the chiller is about 0 5, the evaporation temperature of the freezer is about -20 30, and the evaporation temperature of the household air conditioner is about 5 10. If the evaporation pressure of the refrigerant is lower than the atmospheric pressure, the air is easy to enter the system, and the system is more difficult to treat, so it is hoped that the evaporation pressure of the refrigerant can be higher than the atmospheric pressure when the refrigerant evaporates at low temperature.

2.The latent heat of evaporation should be large.

The latent heat of evaporation of refrigerant is large, which means that a large amount of heat can be absorbed by using less refrigerant.

3.The critical temperature should be high.

If the critical temperature is high, it means that the condensation temperature of the refrigerant is high, and the air or water at room temperature can be used to cool the refrigerant to achieve the effect of condensation and liquefaction.

4.The condensing pressure should be low.

The low condensation pressure means that the refrigerant can be liquefied at a lower pressure, and the compression ratio of the compressor is small, which can save the horsepower of the compressor.

5.The solidification temperature should be low.

The freezing point of the refrigerant should be low, otherwise the refrigerant will freeze in the evaporator and cannot be circulated.

6.The specific volume of gaseous refrigerant is smaller.

The smaller the specific volume of the gaseous refrigerant, the better, the volume of the compressor can be reduced to reduce the cost, and the suction pipe and exhaust pipe can be piping with smaller refrigerant.

7.The density of liquid refrigerant should be high.

The higher the density of the liquid refrigerant, the smaller the piping can be used.

8.Soluble in refrigerated oil, the system does not need to be fitted with an oil separator.

Ideal refrigerant chemistry.

1.Chemically stable.

The evaporation temperature will change with the application temperature, for example, the evaporation temperature of the water chiller is about 0 5, and the refrigerant only has physical changes, but no chemical changes, and has no decomposition effect.

2.Non-corrosive.

It is non-corrosive to steel and metal, and ammonia is corrosive to copper, so copper pipe piping should not be used in ammonia refrigeration system; The insulation should be good, otherwise the insulation of the compressor motor will be damaged, so ammonia should not be used in closed compressors, so as not to be in direct contact with the copper coil.

3.No environmental pollution.

It is harmless to the natural environment, does not destroy the ozone layer, and has a low greenhouse effect.

4.Non-toxic.

5.It does not have the ability to be ** and flammable.

It is not harmful to the human body, if R22 is heated and decomposed, chlorine will be produced, and then it will be harmful to the human respiratory system. Dizziness and the desire to sleep may be caused by other reasons, or it may be psychological.

The refrigerant is colorless and odorless, and there is no harm to the human body.

Refrigerant Leak Detection:

1. Leak detection lamp leak detection. The refrigerator refrigerant made of freon is mainly composed of halogen group elements, after the halogen group elements and the burning copper meet, its flame will turn green, and the leakage of refrigerant can also be judged according to the color of the flame, and its color will gradually change from light green, light green, dark green, purple green.

2. Leak detection by immersion in water. The method of using water immersion leak detection is mainly to check whether there is a leak in the compressor, evaporator, condenser and other parts of the refrigerator, before the leak detection, first fill the simple part of the refrigerator with an appropriate amount of helium or dry air, and then put it into 50 degrees Celsius water, if there are bubbles, you can find its leakage site.

3. Oil leak detection. The method of oil leak detection is mainly to check whether there is oil stain on the outer wall of the refrigeration system, and at the same time, the welding of the aluminum pipe and copper pipe of the evaporator should be carefully checked during the inspection, or the inner wall of the evaporator, and the welding part of the interface of the high and low pressure pipe of the compressor.

Hello! Now the refrigerant is R600A, which is harmless to the human body, but this gas gathers to a certain amount, and it will occur when it encounters an open flame, and there is no big problem with general household use.

The refrigerant of refrigerators contains fluorine, a chemical substance that does not have much effect on the human body, as if it is said to destroy ozone storage. It is recommended to use a frost-free air-cooled refrigerator. It is a fluorine-free product and environmentally friendly.

Probably not, our food is generally frozen or kept fresh in the refrigerator, and then taken out to eat, and no one has ever eaten frozen things and hung up.

The refrigerant is to participate in the refrigeration cycle and is a sealed system, so it is harmless.

No refrigerant is in the pipes. Separated by several layers of iron sheets and copper pipes.

The air cooler has a certain harm to the human body, it is best to adjust the appropriate temperature when using the air cooler, do not blow directly, direct blowing is very harmful, if you blow for a long time, there will be dizziness, headache, fatigue, loss of appetite, palpitation, chest tightness, etc.

The structure of the air cooler is relatively simple, the turbofan is composed of a built-in water tank, and the water with lower temperature is dipped in a breathable water curtain through a rolling device, and then the turbofan blows out the air mixed with water, and the water evaporates and absorbs heat on the surface of the human body, so as to achieve the effect of cooling.

There is a hazard of air coolers, I heard that it will cause cancer, and if you want to use a cold fan for a long time, it will cause you to cause cancer.

Refrigeration equipment can only be said to be air conditioning for environmental protection. The most primitive refrigerant refrigerator is harmful to the atmosphere, and the rest does not pollute the environment.