Sunken pavement snow-melting and ice-melting loop heat pipe installation structure

By setting up a return pipe in the evaporator and the height difference between the evaporator pipe to generate natural gravity driving force, the flow resistance problem when laying heat pipes over long distances is solved, and the uniformity and economy of snow and ice melting on long road surfaces are achieved.

CN122105931APending Publication Date: 2026-05-29SICHUAN HIGHWAY PLANNING SURVEY DESIGN AND RESEARCH INSTITUTE LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SICHUAN HIGHWAY PLANNING SURVEY DESIGN AND RESEARCH INSTITUTE LTD
Filing Date
2026-04-17
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

When existing road snow melting heat pipes are laid over long distances, the resistance to steam flow and the resistance to condensate return flow increase significantly, leading to a decrease in heat transfer performance. This necessitates the addition of heat sources and equipment, increasing costs and energy consumption, and making it difficult to meet the needs of long-distance road projects.

Method used

The sunken loop heat pipe structure is adopted. By setting the height difference between the return pipe and the evaporator pipe in the evaporator, natural gravity driving force is formed, which enhances the working fluid circulation, extends the effective snow melting length, and reduces the number of heat sources and equipment.

Benefits of technology

It can achieve uniform snow and ice melting over long road sections without the need for additional heating sources, reducing construction and operation costs, and is suitable for projects such as highways and long bridges.

✦ Generated by Eureka AI based on patent content.

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    Figure CN122105931A_ABST
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Abstract

The application discloses a sunken pavement snow-melting and ice-melting loop heat pipe installation structure and belongs to the technical field of pavement ice-melting, and solves the problems of large working medium resistance, short effective snow-melting, high cost and low reliability caused by the need of adding a heat source due to long-distance laying of the existing heat pipe. The sunken pavement snow-melting and ice-melting loop heat pipe installation structure comprises a road snow-melting unit, a heat supply unit and a heat exchanger. The loop heat pipe of the road snow-melting unit comprises a heating loop and an evaporator. The heating loop comprises an evaporation pipe, a heating pipe and a liquid return pipe. The heating pipe is buried in a pavement or a bridge deck. The evaporation pipe and the liquid return pipe are respectively arranged at the top and the bottom of the evaporator to form a closed loop. The heat supply station is arranged at the side of the road and is communicated with the heat exchanger through a pipeline. The heat exchanger is lower than the heating loop. The height difference between the liquid return pipe and the evaporation pipe in the evaporator is 0.8-1.5 m. The effective snow-melting length is proportional to the height difference. The application utilizes the height difference to form a gravity driving force, and can prolong the effective snow-melting length and reduce the cost without an additional heat source. The application is suitable for different installation scenes of long-distance bridge decks and pavements.
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