Radiation refrigeration cold storage device based on phase change and volume change self-regulation

A radiative cooling and cold storage device that self-regulates the interface contact state through the volume change of phase change materials solves the problem of interface thermal resistance adjustment, achieves efficient storage and release of cold energy, and is suitable for passive cooling of buildings.

CN122237206APending Publication Date: 2026-06-19SHANDONG ZHONGRUI NEW ENERGY TECH CO LTD
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Patent Information

Application Number
CN202610692494.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-19
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

In existing radiative cooling and phase change cold storage devices, the interface contact state is fixed, making it difficult to adjust the interface thermal resistance according to day and night operating conditions. This leads to a mismatch in cold energy transfer, resulting in cold energy loss or overcooling, making it difficult to achieve efficient storage and utilization of cold energy.

Method used

Design a radiation refrigeration and cold storage device based on phase change volume change self-regulation. By adjusting the volume change of the phase change material, the height of the sealed cavity is adaptively adjusted, the interface contact state is changed, and the cold transfer is regulated.

Benefits of technology

It achieves adaptive storage and release of cooling capacity, improves the day-night mismatch problem, and enhances the efficiency of cooling capacity utilization. It has the advantages of simple structure, reliable operation, and zero energy consumption, and is suitable for scenarios such as passive cooling in buildings.

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Abstract

The invention discloses a radiation refrigeration cold storage device based on phase change and volume change self-regulation, relates to the technical field of sky radiation refrigeration, and solves the problem that controllable storage and efficient utilization of cooling capacity are difficult to realize by a traditional direct contact type structure. The device comprises a radiation refrigeration plate, a phase change cold storage unit and a heat preservation layer. The phase change cold storage unit is located in the heat preservation layer and located below the radiation refrigeration plate. The phase change cold storage unit comprises a sealing cavity and a phase change material filled in the sealing cavity; in the phase change process, along with the volume change of the phase change material, the height of the sealing cavity can be adjusted in a self-adaptive mode, the sealing cavity moves towards the upper surface of the radiation refrigeration plate, and therefore the contact state between the sealing cavity and the radiation refrigeration plate is changed. The contact thermal resistance is adjusted and controlled in a self-adaptive mode through phase change and volume change, adjustment of the radiation refrigeration capacity under different working conditions is achieved, and therefore the utilization efficiency of the refrigeration capacity is improved, and the problem that day and night refrigeration is not matched is solved.
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