一种强化冷凝液体回流的梯度结构热管
By setting a gradient structure and a hydrophilic-hydrophobic coating on the inner wall of the heat pipe, the condensate reflux is enhanced, which solves the problem of low condensate reflux efficiency of traditional heat pipes in complex environments, and achieves high-efficiency heat transfer performance and wide application.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SCNU QINGYUAN INSTITUTE OF SCIENCE & TECHNOLOGY INNOVATION CO LTD
- Filing Date
- 2025-07-14
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional heat pipes suffer from low efficiency in condensate return, especially under large tilt angles or in zero-gravity environments, and their capillary structure is easily damaged, making it difficult to meet high-power heat dissipation requirements.
The heat pipe adopts a gradient structure, with equally spaced trapezoidal grooves and protrusions on the inner wall of the pipe. The grooves are coated with a hydrophilic substrate, and the protrusions are coated with a hydrophobic substrate. The roughness of the grooves gradually increases, and the roughness of the protrusions gradually decreases. Combined with the hydrophilic and hydrophobic properties and the tapered design, it promotes the reflux of condensate.
It maintains good condensate reflux under various operating conditions, improves heat transfer performance, expands the application range, and overcomes the shortcomings of traditional heat pipes.
Smart Images
Figure CN224517511U_ABST
Abstract
Claims
1. A gradient-structure heat pipe for enhancing condensing liquid return, characterized by, The tube (1) is hollow inside. The tube (1) includes an evaporation section (2), an insulation section (3) and a condensation section (4). The inner wall of the tube (1) is provided with equally spaced trapezoidal grooves (5) along the axial direction. A trapezoidal boss (6) is provided between adjacent trapezoidal grooves (5). The trapezoidal grooves (5) are coated with a hydrophilic substrate (7), and the trapezoidal bosses (6) are coated with a hydrophobic substrate (8). The trapezoidal groove (5) and trapezoidal boss (6) are provided with rough structures (10). The roughness of the trapezoidal groove (5) gradually increases along the direction from the condensation section (4) to the evaporation section (2), and the roughness of the trapezoidal boss (6) gradually decreases along the direction from the condensation section (4) to the evaporation section (2). The groove opening of the trapezoidal groove (5) is provided with a tapering opening (9) along the direction from the condensation section (4) to the evaporation section (2).
2. A gradient-structure heat pipe for enhancing condensation of liquid return according to claim 1, wherein The tube (1) is made of copper and is circular in shape.
3. A gradient-structure heat pipe for enhancing condensation of liquid return according to claim 2, wherein The rough structure (10) is a columnar structure with a diameter of 40-80μm and a spacing of 50-150μm.
4. A gradient-structure heat pipe for enhancing condensation of liquid return according to claim 3, wherein The contact angle of the hydrophilic substrate (7) is 30-80°, and the coating material of the hydrophilic substrate (7) is hydrophilic titanium dioxide.
5. A gradient-structure heat pipe for enhancing condensation of liquid return according to claim 4, wherein The contact angle of the hydrophobic substrate (8) is 100-150°, and the coating material of the hydrophobic substrate (8) is hydrophobic silicon dioxide.