A freeze-drying system

By combining a dual-mode freeze-drying device with a CO2 refrigerant and hot water circulation system, the problems of high cost, cumbersome operation and high energy consumption of freeze-drying equipment are solved, realizing a high-efficiency and low-cost freeze-drying process, reducing the number of material transfers and the risk of contamination.

CN224498939UActive Publication Date: 2026-07-14ZHEJIANG TONKING NEW ENERGY GRP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
ZHEJIANG TONKING NEW ENERGY GRP
Filing Date
2025-07-22
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

Existing freeze-drying equipment suffers from high equipment costs, cumbersome operation, the need for multiple material transfers which can lead to contamination or damage, and high energy consumption during the defrosting process.

Method used

The equipment employs a dual-mode material freeze-drying system, combining a CO2 refrigerant circulation subsystem and a hot water circulation subsystem. Freezing and drying are achieved through contact heat exchange plates. A cold trap coil refrigerant venting subsystem is added to reduce the heating process of the cold storage and refrigerant. Combined with CO2 energy storage and air energy storage systems, it achieves combined cooling, heating and power.

Benefits of technology

It reduces equipment costs and energy consumption, decreases the number of material transfers, reduces the risk of pollution and damage, and improves production efficiency and effectiveness.

✦ Generated by Eureka AI based on patent content.

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Abstract

This utility model discloses a freeze-drying system with the advantage of adding a CO2 refrigerant circulation subsystem to its dual-mode material freeze-drying equipment. Two sets of pipe valve assemblies are quickly connected to the heat exchange channel of the contact heat exchange plate on the moving material cart within the freeze-drying chamber to control the switching of the heat exchange medium. In freezing mode, the CO2 refrigerant circulation subsystem is connected to the heat exchange channel to freeze the material; in drying mode, the hot water circulation subsystem is connected to the heat exchange channel to dry the material; and in residual removal mode, a blower is connected to the heat exchange channel to remove residual heat exchange medium and replace it with air. Thus, freezing and drying of the material can be completed within the freeze-drying chamber, saving the equipment costs, energy consumption, and time required for external freezing. Furthermore, a cold trap coil refrigerant venting subsystem is added to vent the refrigerant from the cold trap coil before defrosting. During the defrosting process, there is no refrigerant in the cold trap coil, thus reducing energy waste and shortening the defrosting time.
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