What is the use of the refrigerant R134a, and what can the r134a refrigerant be used instead?

Mainly used as an environmentally friendly alternative to R12, it is widely used in refrigeration and air conditioning systems such as automotive air conditioners, refrigerators, air conditioners, and commercial refrigeration; It can also be used as an aerosol propellant, flame retardant and foaming agent for pharmaceutical, pesticide, cosmetics, cleaning and other products. In addition, R134A is also a raw material for the formulation of some azeotropic refrigerant mixtures (such as R404A, etc.).

The application characteristics of R22 freon and R134A freon are analyzed as follows:

1. The global warming potential (GWP) of R134A freon is , and R22 freon is , both of which belong to greenhouse gases.

2. The ozone depletion potential (ODP) of R134A refrigerant is 0, and the R22 refrigerant is, which is the reason why R134A refrigerant is an environmentally friendly refrigerant.

3. The specific volume of R134A refrigerant is twice that of R22 refrigerant, and the latent heat of evaporation is small, so the freezing capacity of R134A refrigerant unit is only 60% of that of R22 refrigerant unit. According to the unit cooling capacity**, the ** of the refrigerant R22 unit is about 60% of the refrigerant R134A unit.

4. The thermal conductivity of refrigerant R134A is 10% lower than that of R22, so the heat exchange area of the heat exchanger of the refrigerant R134A unit needs to be larger.

5. The water absorption of R134A refrigerant is very strong, which is 20 times that of refrigerant R22, so the requirements for the dryer in the unit system are higher to avoid ice blockage.

6. R134A refrigerant has a stronger swelling effect on rubber substances than refrigerant R22, and the leakage rate of refrigerant is higher in actual operation. In addition, it is highly corrosive to copper, and "copper plating" will occur during use, so additives must be added to the system.

7. The refrigerant R134A system needs a special compressor and a special grease lubricating oil, which is inferior to the mineral oil used in the refrigerant R122 system in terms of the stability of system performance due to its high water absorption, high foaming and high diffusion.

8. The ** of HFCS refrigerant such as refrigerant R134A and its special grease oil is higher than that of refrigerant R22, and the operation and maintenance cost of the equipment is higher.

1. In fact, R134A itself is an HFC refrigerant that replaces R12.

It is generally recommended to use 404a, 407c, 410a, which can be directly replaced in fixed equipment. 2. If you want to replace R134A refrigerant, you still need to replace the refrigeration oil with 12 refrigerant oil before you can replace other types, otherwise it is easy to damage the compressor. 3. Because there will be some subtle differences in the effects of different refrigerants, it is not recommended to directly replace the same type.

Suggested Use:

1. Because the compressor oil used in different refrigerants is also different, the compressor oil and the compressor sealing ring.

It only causes the marked refrigerant, so it cannot be replaced at will in the daily use process, nor can it be mixed at will, which can easily lead to congestion in the positive cooling pipe or compressor jamming.

2. If you want to replace the refrigerant, you must change to the compressor that is adaptable, and it should also be noted that the cleanliness of the pipeline must be ensured when the refrigerant is added for the second time, and it can only be carried out under the operation of professionals, so as to better solve the problem.

3. According to different types of compressors, the suitable refrigerant can be selected for secondary addition, so that the compressor can run normally, and will not reduce the service life of the compressor, otherwise it is likely to cause damage to the compressor.

As the most widely used medium and low temperature environmental protection refrigerant, R134A is a very effective and safe alternative to CFC-12 due to the good comprehensive performance of HFC-134A, which is mainly used in most fields using R-12 (R-12, Freon 12, F-12, CFC-12, Freon 12, Dichlorodifluoromethane) refrigerant, including: refrigerators, freezers, water dispensers, automobile air conditioners, ** air conditioners, dehumidifiers, cold storage, commercial refrigeration, chillers, In refrigeration equipment such as ice cream machines and refrigeration condensing units, it can also be used in aerosol propellants, medical aerosols, insecticide propellants, polymer (plastic) physical foaming agents, and magnesium alloy shielding gases.

Although R134A refrigerant is the most common choice to replace Freon R-12 in newly installed refrigeration equipment, because R134A and R-12 are different in terms of physicochemical properties, theoretical cycle performance and compressor oil, etc., for the after-sales maintenance of refrigeration equipment initially installed with R-12 refrigerant, if it is necessary to add or replace refrigerant, R-12 can still only be added, and R-134A is usually not directly used to replace R-12 (that is, it is usually not possible to replace it with blood exchange). Let's talk about the main differences between R134A and R-12 refrigerants.

1.The container in which the R134A is stored is light blue, while the container in which the R-12 is stored is white.

The refrigerant connection hose is made of rubber and nylon, and has the seal of the Society of Automotive Engineers on its premisesThe R-12 refrigerant connection hose is usually a general rubber hose.

Refrigerant connection pipes are color-coded (blue with black stripes for low-pressure pipes, red with black stripes for high-pressure pipes, and yellow with black stripes for normal pipes) while R-12 refrigerant connections are unmarked.

Quick couplings are used at the refrigerant inlet, while R-12 refrigerants are estimated to be threaded.

The connection hose to the meter has a 1 2 inch thread, and the connection of the high pressure port is larger than that of the low pressure port; The R-12 refrigerant connection hose to the meter has a 7 16in thread.

6.Compared to R-12 refrigerant, R134A refrigerant has higher pressures and temperatures and requires larger cooling fans.

CRR intercooled warm reminder: now there are many counterfeiting methods that are difficult to prevent, everyone should not be greedy for small bargains, must buy well-known big brands, in order to avoid potential inferior refrigerants and compressors contact and damage to the compressor.

R12 is a refrigerant that harms the ozone layer.

It has been banned.

R134A is an alternative refrigerant to R12 and has many properties similar to R12.

R134A is a very safe refrigerant with very low toxicity, non-flammable in the air and a safety category of A1.

R134A has good chemical stability, but because it has higher water solubility than R22, it is not good for the refrigeration system, even if a small amount of water exists, under the action of lubricating oil, etc., acid, carbon dioxide or carbon monoxide will be generated, which will corrode the metal, or produce a "copper plating" effect, so R134A has higher requirements for the drying and cleaning of the system. R134A has no mutual chemical reaction on steel, iron, copper, aluminum and other metals, and only has a slight effect on zinc.

R-134A refrigerant, alias R134A, HFC134A, HFC-134A, Tetrafluoroethane, trade names are Suva 134A, Genetron 134A, Klea 134A, etc., Chinese name tetrafluoroethane, English name 1,1,1,2-tetrafluoroethane, chemical name 1,1,1,2-tetrafluoroethane, chemical formula CH2FCF3.

Because R-134A belongs to HFC substances (non-ODS substances Ozone-Depleting Substances) - so it does not destroy the ozone layer at all, it is an environmentally friendly refrigerant recognized and recommended by most countries in the world, and it is also the mainstream environmentally friendly refrigerant, which is widely used in the initial installation and maintenance process of new refrigeration and air conditioning equipment.

R134A, as the most widely used environmentally friendly refrigerant for medium and low temperature colasers, makes it a very effective and safe alternative to CFC-12 due to the good comprehensive properties of HFC-134A, which is mainly used in most fields where R12 refrigerant is used. Including: refrigerators, freezers, water dispensers, automotive air conditioners, air conditioners, dehumidifiers, cold storage, commercial refrigeration, chillers, ice cream machines, refrigeration condensing units and other refrigeration equipment.

At the same time, it can also be used in aerosol propellants, medical aerosols, insecticide propellants, polymer (plastic) physical foaming agents, and magnesium alloy shielding gases.

CRR intercooled warm reminder: now there are many counterfeiting methods that are difficult to prevent, everyone must not be greedy for the vertical picture of the stove small cheap, must buy a well-known big brand, in order to avoid potential inferior refrigerant contact with the compressor and then damage the compressor.