air compressors and cold dryers a piece of equipment?

not one, but two. But they always work close together, so many people think they are one. Let's make this completely clear today.

Air compressor is what the

an air compressor is a machine that sucks and compresses air and then spits it out. You can think of it as a super pump, but it has a lot of air pressure and can drive all kinds of pneumatic tools and equipment.

After the air is compressed, a very annoying thing will happen: the temperature rises, and the invisible water vapor in the air becomes small water droplets. These water droplets are mixed in the compressed air and run all the way to your gas equipment along the pipeline. In the light, the pneumatic tools will rust, the sprayed products will have water marks, and in the heavy case, the whole production line will be shut down.

So it's not enough to have an air compressor, you have to get this water off. At this time, the cold dryer came on stage.

What does

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cold dryer do?

the full name of the cold dryer is called a freeze dryer, and its working principle is particularly easy to understand: just like when you take out a bottle of iced coke from the refrigerator, the bottle will immediately emit water droplets. This is what the cold dryer does. It quickly cools the compressed air, and the water vapor in the air condenses into water droplets, which are then discharged through the drain. After the treatment of the cold dryer, the air is very dry, and the moisture content will drop to a very low level.

For example, the air compressor is the person responsible for squeezing water into the air, and the cold dryer is the person responsible for wringing water out of the air. The two are in a relationship, not the same person.

Then why do people always think it's one

because in most factories, air compressors and cold dryers are placed side by side, and the pipes are directly connected, and no one needs to intervene in the middle. When you turn on the air compressor, the cold dryer starts and looks like a whole set of things.

For the convenience of customers, some manufacturers will install the air compressor and the cold dryer on the same base with a box outside the mask, which looks like a large equipment. But when you take the shell apart, it is clear that there are two completely independent machines, each with its own motor, its own control system, and its own consumables.

They need to maintain what

the air compressor needs to change the lubricating oil or filter element, depending on whether the oil level is enough, and the air filter should be replaced by dust removal.

Cold dryer to clean the dust on the condenser, to change the desiccant, to check whether the drain valve is blocked.

The maintenance cycle of the two machines is different, and the maintenance content is also different, so do not confuse them.

Water lubricated air compressor with cold dryer

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, there is a very comfortable place

if you use a water-lubricated air compressor, with a cold dryer, the whole gas path will be much cleaner than the traditional oil-injected air compressor.

The air discharged by the traditional oil injection air compressor carries oil mist and water vapor. When the cold dryer cools down, the oil mist will condense and stick to the heat exchange tube of the cold dryer. As time goes by, the surface of the heat exchange tube will be pasted with a layer of sludge, and the heat dissipation effect will become worse and worse. The cold dryer will have to work harder to dry the air, the electricity bill will go up, and the cold dryer will have to be cleaned frequently.

The air discharged from the water-lubricated air compressor itself has no oil, only clean gas and a small amount of water vapor. The cold dryer is very easy to handle, no sludge will accumulate on the heat exchange tube, and the heat dissipation efficiency is always maintained very well. The cold dryer does not have to work so hard, consumes less electricity, and the cleaning cycle can be pulled longer.

Moreover, the temperature of the compression process of the water-lubricated air compressor is controlled relatively smoothly, the temperature of the gas coming out will not rise or fall, the state of the gas received by the cold dryer is more stable, the work is smoother, and it is not easy to freeze and block.

Therefore, the combination of water lubricated air compressor and cold dryer has less burden on back-end equipment, low maintenance frequency and more worry-free overall operation.

One word summary

Air compressor and cold dryer are two independent equipment, one is responsible for compressing air and the other is responsible for removing moisture from the air. No one can replace anyone. It is only because they always work together that they are easily treated as a machine. If you use a water-lubricated air compressor, the whole gas path will be cleaner after being equipped with a cold dryer, and the cold dryer will be less likely to be blocked by sludge, thus saving a lot of worry in the later maintenance.