Ecological environment sample preservation box based on phase change material temperature control

By employing a double-layer phase change material temperature control design and a high-efficiency insulation structure in the ecological environment sample preservation box, the problems of uncontrollable temperature and dependence on external energy in the sample preservation box are solved, enabling long-term constant temperature preservation without external power supply, and improving the portability and environmental friendliness of the equipment.

CN122402935APending Publication Date: 2026-07-17SHANDONG UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SHANDONG UNIV
Filing Date
2026-04-27
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing ecological environment sample preservation boxes have shortcomings such as uncontrollable temperature, poor stability, reliance on external energy, and bulky equipment, making it difficult to meet the sample preservation needs under long-term conditions without external power.

Method used

It adopts a dual-layer temperature control design based on phase change materials, and uses cold storage modules with different phase change temperatures (4℃ and 20℃) to form a multi-level gradient temperature control structure. Combined with a high-efficiency insulation structure and modular design, it can achieve constant temperature storage without external power supply.

Benefits of technology

It achieves stable control of sample temperature under varying external temperature conditions, extends the heat preservation time, and is lightweight and environmentally friendly, making it suitable for field and emergency conditions, and avoiding the risks of sample overfreezing and temperature runaway.

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Abstract

This invention discloses an environmental sample preservation box based on phase change material (PCM) temperature control. The box includes a body with an inner liner and a sample holding chamber inside. The outer side of the inner liner is covered by a first PCM cold storage module, and the outer side of the sample holding chamber is covered by a second PCM cold storage module. This invention is applicable to the field of environmental sample preservation technology. It utilizes PCM cold storage for cooling, maintaining a constant temperature without any external power supply. This breaks through the dependence of traditional cold storage boxes on electricity, achieving truly passive operation, and is particularly suitable for field and emergency conditions. By setting two PCM layers with different melting points, it creatively transforms a large external temperature difference into a relatively stable internal temperature difference. The outer PCM module absorbs environmental thermal shock, while the inner PCM module precisely controls the sample temperature, achieving multi-level gradient temperature control. The PCM cold storage materials are integrated in a standard modular form, facilitating filling and replacement. The number of cold storage modules can be freely combined according to different transportation durations to meet different insulation time requirements.
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