3-in-1 Heat Exchanger 10.5m³/min 370 CFM Refrigerant Air Dryer

It uses a 3-in-1 plate heat exchanger. The heat exchange area is larger. So the efficiency is higher than the shell-tube type. It can fully recycle waste cooling. The inlet/outlet temperature difference is only less than 10℃. The compressed air entering the evaporator is cooler. So it needs less refrigerant. That is, the required compressor power is smaller.

The former has less power. So it’s more energy efficient. It can save 20~30% on energy consumption. In addition, the pressure loss is only 0.15 bar. That is far below the national standard. It can also reflect energy saving.

Conventional shell-tube heat exchangers use carbon steel casing. Rust is unavoidable. Impurities can cause internal leakage in the evaporator. It will also clog the drain. But this refrigerated compressed air dryer is different in materials. It’s aluminum alloy or stainless steel. Not easy to rust. There will be no secondary pollution.

This refrigerated air dryer for compressors adopts eco-friendly refrigerant. That is, R134a, R410a, and R407c. So it has wide application in the medical food industry.

The refrigeration system is with electronic expansion valve and an electronic pressure switch. So the system runs more stable. And it can avoid ice blockage.

The expansion valve can adjust the flow of refrigerant. Traditional refrigerant compressed air dryer uses thermal expansion valves. It takes 10 minutes from self-regulation to stabilization.

But the electronic expansion valve only takes 10 seconds. So the response is faster. And its adjustment accuracy is higher. Finally, it can ensure the precise operation of refrigerated air dryer for compressors.

The pressure dew point of this compressed air refrigerated dryer is 2~8℃. Besides, it can withstand third-party tests. The pressure dew point is very stable. The heat exchange efficiency is high because it uses a three-in-one heat exchanger. So the water removal effect is very good. Therefore, it can obtain such high compressed air quality.

The standard pressure of this refrigerated air dryer for compressor is 1.6MPa. So it’s applied to the demanding laser cutting industry. Compressed air has wide applications in laser cutting. And its quality has a direct impact on the quality of laser cutting. Because there are water mist and oil, they are very harmful. They can be ejected onto the laser protection mirror surface if not purified. So it can seriously affect the transmission of the laser beam. Finally, it will distract the focus and affect processing results. So we must need a refrigerated compressed air dryer. Sometimes, the dew point requirement is higher. Then it also needs a desiccant air dryer.

Firstly, we can manufacture large refrigerated air dryer for compressors. The max air capacity can reach 350m³/min. Of course, it will be a water-cooled refrigerant compressed air dryer. Many manufacturers can’t make such a big dryer. Moreover, Lingyu can add compressed air filters to the dryer. There are 4-stage coalescing filters. And it can be either external or built-in.

In addition, we can also customize a pre-cooler onto the refrigerated compressed air dryer. So this air dryer can suit high inlet temperatures. Then it will have a wider application. Besides, Lingyu can also add a digital controller. It can display the evaporation temperature of a refrigerant air dryer.

Our refrigerated air dryer for compressor has good quality and reputation. They usually work with big air compressor companies, such as Ingersoll Rand, Atlas Copco, Kaeser, Hitachi, Sullair, Kobelco, etc. So, you can rest assured of our quality. We are the top-rated refrigerant compressed air dryer manufacturer in China.

We generally use rotary compressors. It produces the refrigerant to cool the compressed air. Its cooling capacity is closely related to the working conditions. The lower the evaporating temperature, the less cooling capacity. And the higher the condensing temperature, the lower the unit cooling capacity. So sometimes we want to lower the evaporating temperature. To reduce the dew point of refrigerant type air dryers. But this is not economical.

We know it can compress air. But cannot compress liquids. Instead, the liquid will damage the compressor device. When the refrigerated compressed air dryer works, the liquid refrigerant enters the evaporator. If too much, the compressed air cannot fully evaporate them. As a result, the liquid refrigerant may be sucked into the compressor. Then it is very easy to damage the compressor valve plate.

So we must prevent the compressor from producing a “liquid hammer”. Generally, take the following measures to protect the refrigeration dryer:

1. Set the low-pressure liquid tank. So ensure that only gaseous refrigerant enters the compressor;
2. Install the hot gas bypass valve.

It is a key component of refrigerated air dryer for compressors. It contains 3 main spare parts. Namely heat exchanger, evaporator, and separator. So it integrates the functions of these 3 components.

• Heat exchanger of refrigerated air dryer for compressor

It is also called a pre-cooler. After evaporation, the compressed air is cold. They will come back here. Then they exchange heat with the hot air. Therefore, it can reduce the load of refrigerated compressed air dryers. Then it’s saving energy. In addition, the purified compressed air will warm up. So the temperature difference between the inlet and the outlet is very low. It’s about 5~8℃. At the same time, it can avoid condensation water droplets at the outlet.

• Evaporator of refrigeration air dryer

It is the main heat exchange part of refrigerant compressed air dryer. The refrigerant liquid will absorb the heat of the high-temperature air. Eventually, they evaporate into a gas. During this process, the water vapor condenses into liquid. Then it will be discharged from the dryer by the separator.

• Air-water separator

It’s very critical. If not, it can’t achieve the purpose of drying. It is an inertial separator. The separation efficiency is greater than 99%. There is an electronic drain valve. So it can drain the water in time.

• Refrigerant filter drier

Our refrigerated compressed air dryer uses the famous brand. It’s an EMERSON filter drier from USA. It plays two functions. i.e., filtering and drying.

There are moisture and solid impurities in refrigerant and refrigeration oil. In severe cases, the throttling structure will be dirty and blocked. So there must be a filter. In addition, moisture is very harmful to refrigeration systems. We must do the drying treatment. So it’s important for refrigerated air dryer for compressor.

• Hot gas bypass valve

Here we use the electronic bypass valve. It is a safety device. It is located between the evaporator and the condenser. It is directly connected to the evaporation pressure. Sometimes, the evaporation pressure is too low. So the hot gas bypass valve opens automatically. The high temp refrigerant vapor enters the evaporator. Then it can raise the evaporation temperature. Thus, it avoids ice blockage in refrigerant compressed air dryers.

• Refrigerant expansion device

There are mainly 2 types. Namely capillary and heat expansion valves. They are throttling devices. It uses the capillary in this refrigerated compressed air dryer. It has wide application in small air dryers.

Capillaries have self-compensating feature. The pressure difference between the two ends will increase when the evaporative pressure decreases. Thereby increasing the amount of refrigerant flowing into the evaporator.

The 3-in-1 heat exchanger is made of metal sheets. Its heat exchange area is large. Various plates form thin rectangular channels. Heat exchange through the plates. Besides, it has a certain corrugated shape. So it can generate strong turbulence. Therefore, the heat transfer coefficient of the former refrigerated compressed air dryer is relatively high. Generally, it is 3~5 times that of the latter.

A 3-in-1 heat exchanger is an aluminum alloy or stainless steel. So the corrosion resistance is better. The latter is generally made of carbon steel. Contact with moisture can easily lead to corrosion. Then the refrigerant compressed air dryer inside will rust. Eventually, it will pollute the compressed air. At the same time, it will cause the filter element to become clogged. So the air quality will decrease.

For the latter, the fluid will be blocked by the baffles. Heat exchange is not sufficient. Therefore, its size is often relatively large to achieve a good dew point. Finally, the refrigerated compressed air dryer will also be bigger. And it is heavier and takes up a lot of space. For example, the volume of our shell-tube type LY-D75AH dryer is 0.934CBM. But the volume of the PD-75A air dryer is only 0.398CBM.