The difference between the new environmentally friendly refrigerant R134a and R12 refrigerant

Environmentally friendly refrigerants have been used at home and abroad as early as 2013, and countries all over the world are gradually phasing out a variety of traditional refrigerants and advocate the use of environmentally friendly refrigerants. Of course, environmentally friendly refrigerants are mainly embodied in 'energy saving and environmental protection

The main difference between the new environmentally friendly refrigerant R 134a and the R12 refrigeration system:

1. The container for storing the refrigerant R134a is light blue, and it is stored The R12 container is white.

2, R134a refrigeration system connecting hose is specially made of rubber and nylon, and has the mark of the Society of Automotive Engineering (SAE#J2196) everywhere; while R12 refrigeration system connecting hose is usually made of general rubber tube.

3, R134a new refrigeration system connecting pipe has color marking (low pressure pipe is blue with black stripes, high pressure pipe is red with black stripes, ordinary pipe is yellow with black stripes) and R12 refrigeration system connecting pipe There is no mark.

4. The R134a new refrigerant inlet uses a quick coupling, while the R12 refrigeration system uses a threaded interface.

5. The joint of the new refrigerant R134a refrigeration system connecting the hose and the instrument has a 1/2in inch thread, and the high-pressure port joint is larger than the low-pressure port; while the R12 refrigeration system connects the hose and the instrument The connector has a 7/16in thread.

6. Compared with the R12 refrigeration system, the new refrigerant R134a refrigeration system has a higher pressure and temperature and requires a larger cooling fan.

Advantages of the new refrigerant R134a:

1. The new refrigerant R134a does not contain chlorine atoms and does not damage the atmospheric ozone layer; it has no greenhouse effect .

2, the new refrigerant R134a has good safety performance (non-flammable, non-explosive, non-toxic, non-irritating and non-corrosive).

3. The heat transfer performance of the new refrigerant R134a is relatively close, so it is easier to modify the refrigeration system.

4. The heat transfer performance of the new refrigerant R134a is better than that of R12, so the amount of refrigerant can be greatly reduced.

5. The freezing point is low, and the latent heat of evaporation is greater, which makes the temperature drop faster per unit time.

6. The compressor has a low pressure ratio, which makes the compressor work easier and prolongs its service life.

7. It can be directly substituted without changing any structural components of the air conditioner.

8. Low system operating cost. When the air-conditioning system is running, while ensuring the cooling capacity, the power saving rate reaches about 20%-35%.

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