A low-temperature defrosting and high-temperature steam direct supply integrated heat pump system

By eliminating the refrigerant switching of the four-way valve and adopting an integrated heat pump system with low-temperature, non-switching defrosting and direct high-temperature steam supply using multiple sets of finned heat exchangers and wound heat exchangers, the problems of defrosting hydraulic shock and lengthy steam generation paths have been solved, achieving efficient defrosting and high-temperature steam supply.

CN122129800APending Publication Date: 2026-06-02GUANGZHOU EURASIAN REFRIGERATION EQUIP MFG
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUANGZHOU EURASIAN REFRIGERATION EQUIP MFG
Filing Date
2025-07-22
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing air source heat pumps suffer from hydraulic shock and heating interruption issues during defrosting in extremely cold regions, and their long steam generation paths make it difficult to meet the high-temperature steam demands of industry.

Method used

The integrated heat pump system adopts low-temperature, non-switching defrosting and high-temperature steam direct supply. By eliminating the refrigerant switching of the four-way valve, it uses multiple sets of finned heat exchangers and wound heat exchangers to achieve defrosting and steam generation, avoiding hydraulic shock and improving heat exchange efficiency.

Benefits of technology

It significantly improves unit lifespan and energy efficiency ratio, shortens defrosting time, enhances heat exchange efficiency, and directly supplies high-temperature steam to meet industrial needs.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses a low-temperature defrosting and high-temperature steam direct-supply integrated heat pump system, which comprises a heating cycle module, a defrosting module and a steam generation module, the heating cycle module is composed of a compressor, a gas-liquid separator, a fin heat exchanger and an expansion valve, and the defrosting module is composed of a defrosting exhaust pipe branch, a defrosting valve and a check valve. By canceling the four-way valve refrigerant switching, the valve hydraulic impact, the compressor oil shortage and the liquid impact risk under the high compression ratio condition are avoided, and the service life of the unit is significantly prolonged. By adopting multiple independent fin heat exchangers, the high-temperature exhaust refrigerant of the compressor is introduced into the single fin heat exchanger to realize directional defrosting during defrosting, the defrosting time is shortened, the heat exchange efficiency is improved, and the system energy efficiency ratio is improved. By arranging the winding heat exchanger, the water supplement is directly generated into high-temperature steam, and the problem of low heat exchange efficiency caused by the long path of the secondary pressure increase of the cascade system or the steam compressor is solved.
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