【 Weak current College 】 significance of reclaimed refrigerant

1.1 reduce atmospheric ozone layer destruction

Refrigerant recovery and recycling, is the old refrigerants substituted the transition phase, is also the most active, most effective, most direct damage to the ozone layer. It is the implementation of China's national ODS phase-out plan for child items, the terms "recycling".

1.2 R12, R22 recycling

If a factory has four assembly lines, each line daily production cupboard and split machine 1000 units, according to two 16-hour workday.

2 General refrigeration recovery machine function

2.1 recovery function

Recycling capabilities include recycling rate, recovery of the refrigerant type

Recycling rate in general means a recycling rate of R22, but there is no such clear 25176A type.

Gas recovery rate, generally refers to the ambient temperature of saturated vapor pressure recovery rate, recovery, due to the volume small, the instantaneous pressure will decrease, especially when close to 1 recycled pressure gauge pressure, due to the recovery in the refrigerating gas rate is slow recovery rate will be significantly reduced.

Replacement refrigerants, as long as the recovery unit without the original refrigeration steam, you can replace, but recovery machine if you use a new replacement compressor oil, refrigerant and compressor oil must be adaptive, otherwise can not be replaced.

2.2 purification function

2.2.1 recycling machine cleaning

1) simple filter

Filtering area around, once the dirt 2000mm2, significantly affects recovery rate, at this point that filter saturation failure, can only get a new one. But more people mistakenly believe that recovery is too slow, not easy to use, place it side.

Super fine filter 2)

Filter area > 14000mm2, is a simple filter 7 times, so the Super fine filter saturation failure time, it should be a simple filter's 7 times.

3 oil and gas separator)

By cooling the oil and shuiyi stickers wall, but due to the compressor running, refrigerant will be blowing oil and water flows along the direction of refrigerant gas movement. When you reach the separator, as its numerator Regiment is too heavy, it being left to the separator plate on the wall, then it slowly flowing to the bottom of the separator, not regular bottom valve is opened, use the separator tank refrigerant pressure, oil, water and dirt from outside the machine. This separation is difficult to saturation, long-term and effective.

Foreign small recycling machines, most use a simple filter that large recycling machine because of the focus on filling function, nor in the Purifier and down too much effort. Domestic recycling machine, because the user is seeking purification, in depth on these technologies, has been completely is patent. 12 recycling machine inlet port uses a "Super fine filter", compressors outgassing port takes one of the "oil and gas separator".

2.3 alarm function

Alarm function primarily means too low downtime, high pressure outages and downtime, overweight have indicates alarm, the compressor working in this region is safe, long-life.

2.3.1 too low downtime

When the recovery in the pressure close to the minimum amount of time, the gas is small, but the maximum pressure difference but, United States 25176A-recycling machine downtime, low voltage, pressure-vacuum take homemade ZHJ 0.12MPa (absolute pressure), its purpose is not to be recycled gases into the air (has been a leading accreditation Haier).

2.3.2 too high downtime

On R22, South 1.7MPa should take in the North, but because the recovery 1.6MPa tank is too small, recycling machines using condenser condensation effect bad, recovery of liquefied gas do not immediately, often appeared in summer high pressure alarm, refrigeration compressors, such as type, because the compressor ZJH compression ratio is 15: 1, if not the police, or the selection pressure too high, easily damaged compressor. So too high downtime is to protect the compressor.

2.3.3 overweight downtime

General market of freon tank are marked with a filling weight, if you use these cans for recycling cans, it is important to note that not overweight, once overweight, most likely because of the ambient temperature changes and make the tank explosion, the consequences will be disastrous. Since the need for excess downtime, it is necessary to have a weighing instrument. So the alarm function is an important guarantee of safety of operations.

2.3.4 release valve

Domestic recycling machine in addition to the above warning, but also with a discharge valve, when the pressure exceeds when discharging 1.9MPa. Foreign collector did not discharge load function, minicomputer or overweight stop function.

2.3.5 voice prompts

Recycling machine while not complex, but the pressure the outages and downtime are overweight as alarm handling, the pressure is not equal to overweight, but due to overweight and overvoltage is very dangerous. Trapped as voice prompts is to tell the operator that prompts action.

2.4 other features

Originally, the above three functions are sufficient to distinguish products can fit for use, but the purchase of products, in addition to the features you want to buy, buy a safe, reliable, easy to buy and buy.

2.4.1 compressor

"2.3.2" already mentioned, refrigeration compressor compression ratio 15: 1, which adds to the collection, a lot of trouble, foreign collector so reliable, because its compressor ratio is 50: 1, so it can recall the negative pressure, pressure settings can also be high. 12 have been replaced by ZJH ZHJ series, all with high compression ratio of dedicated compressor, its reliability is withstand the test of time.

2.4.2 big air condenser

"2.3.2" also mentioned that since the condenser can quickly be recovered refrigerant liquidTank pressure goes up, it is easy for the police, improve the effectiveness of condensing the condenser, in addition to the condenser, its structure is efficient if you increase the cooling air flow can be larger improvements, increase the head wind, is increasing cooling, all in all great air condenser is domestic recycling machine and a pioneering move.


2.4.3 transparent convenient hose

Collector hose often leak, often at a loss for this operator, but transparent hose operator feeling is not the same, there is a real touch feel, this hose has passed 2.0MPa3 hour pressure test, is the most common, minimum price, the most convenient replacement operation hose.

3 after the purity of the refrigerant recovery

Refrigerant in water, impurities and oil are lower purity material, recycling of refrigerant should get rid of these substances.

3.1 before entering the refrigerant recovery machine are the same of purity

Because each collection's original internal pipe wall moisture, how many different impurity, together with the purity of the compressor oil itself, the compressor model is the same, but the oil quantity is also possible that there are differences, but this collection pieces and the recovery of a run-time, so that the compressor oil and the degree of refrigerant gas stripping.

3.2 collection of refrigerant purity increased than the original

3.3 and purification

In fact, from the recycling of refrigerant recycling thing, is only a first step, and really want to remove impurities, water and oil, then cleaning, especially oil, it should be said that each cleaning once, will increase the number of purity. This is because of oil, water gasification temperatures, once set into a cylinder, if the refrigerant for liquefied gas recovery, and then, in the original cylinders of hydraulic and cannot be volatile thing is oil and impurities and moisture.

Large factories should establish refrigerant cleaning, old refrigerant recycling and reuse.

Some people in the industry, do not understand the above procedures, the minimum requirements of recovery machine to achieve over 95% of purity, of course you can do, but not the first purification.

4 oil can reuse

4.1 similar products in the maintenance industry

4.1.1 automotive repair industry

Because R134A refrigerant and compressor oil has fully dissolved, the refrigerant cycle oil evenly in refrigerants, recycling of refrigerant oil. When Auto air conditioning repair, then the recovery of oil in the refrigerant charge to the refrigerator. This also has added new oil province.

4.1.2 household split machine, cupboard maintenance industry

By the same token, the first recovery machine containing oil refrigerant, fix, back-in-place recycling, oil-containing refrigerants after also has added new oil province.

Rely on recovery from this one piece collection of refrigerants, then filling the same recycled parts, often enough, in fact, refrigerants, such as recycling, ten recycling can be fixed, in-place recycling jiutai then finally one can only add new refrigerants, however the ratio should be according to the supplementary oil at the same time.

4.2 refrigeration plant

Refrigeration plant found inadequacies product technology is important, what the process point recovery of the refrigerant, what process point filling refrigerant.

4.2.1 for calibration of refrigerant recovery

This refrigerant is not pollution, collection can be used as a new refrigerant use.

4.2.2 seal after recovery at the small room leak detection

Sealing the leaks in the small room after, if you find that there are even pipe welding, must be recovered refrigerant leakage after welding repair, then the old refrigerant recovery here back in-place to the refrigerator.

4.2.3 inspection found defective refrigerator recycling of refrigerant in the

As a result of inspection, the refrigerant compressor oil and has been part of the phase-coated, recycled refrigerant here also the filling in here, too, can dispense oil supplement.

5. concluding remarks

Article hope refrigerant cleaning up, oil can also be used, this does not contradict. Purification of impurities, water, oil, because of the particularity of the "oil", removing impurities and moisture is always a high-quality products is not allowed to ignore the problem, and because of this, China Refrigeration experts strongly emphasize purification.

Import of recycling machines, due to the use of simple filters, filtration area is too small, use a while feels too slow, not good to use, the flow resistance increases with the filter on