Dezenno Rotor Dehumidifier: The Solution for Ultra-Low Humidity Environments

How do you achieve an ultra-low humidity of 1% RH for a Lithium battery production room? How do you effectively prevent frost in a sub-zero cold storage facility? These are challenges that conventional condensing dehumidifiers cannot solve. When environmental requirements are at their most stringent, only one technology can meet the demand: Desiccant Rotor Dehumidification.

This article will delve into this cutting-edge humidity control technology and introduce Dezenno—DeAir's flagship product line, manufactured in Vietnam to European standards.

1. What Is Desiccant Rotor Dehumidifier Technology and How Does It Work?

Desiccant Rotor Dehumidification is a humidity control method based on adsorption. Instead of cooling the air to condense water vapor, this technology uses a material with extremely high moisture-absorbing capabilities.

The operating principle can be described simply as follows:

• Desiccant Wheel: This is the heart of the system, constructed from alternating flat and corrugated sheets impregnated with a silica gel material, creating thousands of parallel air channels.
• Two separate air streams: The air is divided into two parts:
  • Process Air: This is the humid air from the room that needs to be treated. As it passes through the wheel, water vapor is adsorbed by the silica gel particles, resulting in an ultra-dry air output.
  • Reactivation Air: This is an air stream that is heated (by an electric heater or steam), then blown through a different section of the slowly rotating wheel. This hot air "dries" the silica gel particles, forcing them to release the trapped moisture, which is then vented outside through a separate duct.

Thanks to this unique mechanism, a rotor dehumidifier can operate effectively across all temperature ranges and achieve extremely low humidity levels that condensing technology cannot reach.

2. When is a Rotor Dehumidifier a Must-Have for Your Business?

This is not a one-size-fits-all solution, but rather a specialized technology for industries with the most demanding requirements:

2.1. Ultra-Low Humidity Requirements (RH < 30%)

• Lithium Battery Production: Requires an almost absolutely dry environment to prevent chemical reactions that can cause fires or explosions. The standard requirement is 0.5 - 1% RH.
• Pharmaceutical Industry: Processes such as manufacturing effervescent tablets (requiring 15% RH) and tablet coating (requiring 15-30% RH) to ensure active ingredients are not altered.
• Food Production: Manufacturing hard candy, milk powder, instant coffee, and other powdered products that need a dry environment to prevent caking.

2.2. Low-Temperature Environments

Cold Storage and Freezers: This is an application where condensing dehumidifiers will freeze up and become completely useless. In contrast, a rotor dehumidifier works perfectly even at sub-zero temperatures, completely preventing condensation and frost buildup.

3. Dezenno by DeAir: A "Made in Vietnam" Rotor Solution with European Standards

Understanding the needs of high-tech industries, DeAir has developed the Dezenno Rotor Dehumidifier line, offering a powerful solution with outstanding advantages:

• High-Performance Desiccant Rotor: Dezenno uses rotors imported from world-leading brands, ensuring the ability to achieve ultra-low humidity and durable operation.
• Modular & Customizable Design: Can be easily integrated with Pre-Cool and After-Cool modules to precisely control the output temperature. The casing and components are designed to be anti-corrosive.
• Smart Control Cabinet: Uses a PLC controller and an intuitive HMI screen for precise monitoring and control, with the ability to connect to the factory's central management system (BMS).
• Made in Vietnam: This confirms the advantage of competitive pricing, customization capabilities, and prompt maintenance and repair services.

4. Case Study: The Dezenno Humidity Control System at DHG Pharma

One of the prime examples of DeAir's capability is the project to supply and install a central humidity control system using Dezenno Rotor technology for the DHG Pharma factory. The system ensures that critical production areas always meet the stringent humidity conditions required by GMP standards, demonstrating the trust that leading pharmaceutical companies place in DeAir's solutions.