Parallel flow heat exchanger
The PF heat exchanger's multi-layer coating system effectively prevents corrosion in evaporative environments, ensuring efficient heat transfer and reducing energy consumption.
US20260185785A1Pending Publication Date: 2026-07-02KYUNGDONG NAVIEN CO LTD
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Patent Information
- Authority / Receiving Office
- US · United States
- Patent Type
- Applications(United States)
- Current Assignee / Owner
- KYUNGDONG NAVIEN CO LTD
- Filing Date
- 2025-12-31
- Publication Date
- 2026-07-02
AI Technical Summary
Technical Problem
Conventional evaporative heat exchangers, particularly PF coils, suffer from corrosion due to metal components in water, leading to reduced heat exchange efficiency and potential failure, especially in regions with untreated groundwater.
Method used
A PF heat exchanger with a chemical conversion layer on the refrigerant tube or heat transfer fin, followed by a resin coating layer and a hydrophilic coating layer, using epoxy acrylate resin with a thickness of 2 to 4 μm, enhances corrosion resistance.
Benefits of technology
The multi-layer coating significantly delays corrosion, maintaining heat exchange efficiency and reducing energy consumption by preventing blockages and corrosion-related failures.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure US20260185785A1-D00000_ABST
Abstract
A parallel flow (PF) heat exchanger, including a header, a refrigerant tube formed of aluminum, and a heat transfer fin formed of aluminum, includes a chemical conversion layer provided on a surface layer of the refrigerant tube or the heat transfer fin; a resin coating layer provided on a surface of the chemical conversion layer; and a hydrophilic coating layer provided on a surface of the resin coating layer. The resin coating layer is formed of an epoxy acrylate resin with waterproof properties.
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