Refrigerated Air Dryer

Description

Product Advantages

 

Energy-Efficient: Equipped with an intelligent temperature control system and a high-efficiency heat exchanger, the unit achieves energy savings of 20% to 30% compared to traditional equipment. Select models offer optional variable frequency drive (VFD) technology, which automatically adjusts operating power in response to changes in load demand.

Stable Drying Performance: The pressure dew point of the output air remains stable within the range of 2°C to 10°C, fully complying with the ISO 8573-1:2010 air quality standard. Featuring a multi-stage filtration structure with a filtration precision of up to 0.01 μm, the system effectively captures oil contaminants and particulate impurities.

Intelligent Control: Fitted with a touchscreen interface and an IoT module, the unit allows for real-time monitoring of operating parameters—such as temperature, pressure, and dew point—while supporting remote monitoring and fault pre-warning capabilities. The automatic drain valve features an anti-clogging design, effectively reducing the frequency of manual maintenance.

Durable and Reliable: Designed for a service life exceeding 10 years. The exterior casing is treated with an anti-corrosion coating, enabling the unit to withstand harsh operating environments characterized by high temperatures and high humidity.

 

Working Principle of Refrigerated Air Dryers

 

A refrigerated air dryer utilizes a refrigeration system to cool compressed air, causing the water vapor within the air to condense into liquid water, which is then separated and discharged. This process yields dry compressed air with a low dew point. The operational process can be divided into the following key steps:

1. Air Pre-cooling and Inlet
High-temperature, humid compressed air first enters an air pre-cooler (a component of the heat exchanger), where it undergoes heat exchange with the exiting low-temperature, dry air. This achieves preliminary cooling while simultaneously recovering “cold energy,” thereby enhancing the overall energy efficiency of the unit.

2. Deep Cooling 
The pre-cooled air enters the evaporator. Inside the evaporator, a low-temperature liquid refrigerant (supplied by the refrigeration system) evaporates and absorbs heat, rapidly lowering the temperature of the compressed air to between 2°C and 10°C (the pressure dew point temperature). At this stage, the water vapor in the air becomes supersaturated and condenses into tiny water droplets.

3. Gas-Liquid Separation
The low-temperature compressed air, now containing liquid water, enters a high-efficiency gas-liquid separator. Utilizing centrifugal force or baffle structures, the water droplets are effectively separated from the airflow.

4. Automatic Drainage
The separated condensate is automatically discharged from the unit via an automatic drain valve (such as a float-type or electronic timer-type valve), preventing the moisture from being re-entrained by the airflow.

5. Air Reheating 
The dried, low-temperature air flows through the air pre-cooler (the same component utilized in Step 1), where it exchanges heat with the incoming high-temperature, humid air. Its own temperature rises back to near ambient levels, preventing condensation from forming on the outer surface of the outlet piping while simultaneously further reducing the load on the refrigeration system.

6. Refrigeration Cycle
A refrigeration compressor drives the circulation of the refrigerant through the condenser, expansion valve, and evaporator. This continuous cycle ensures that the evaporator is consistently maintained at low-temperature conditions, thereby guaranteeing continuous dehumidification capability.

 

Product Specifications