Heat exchange tube, heat exchange device, cascade unit, combined cooling and heating system, and control method

By setting the heat exchange body and turbulence section on the outer circumference of the heat exchange tube, the heat exchange area is increased and the flow boundary layer is broken, thus solving the problem of low heat transfer efficiency of bare tube and realizing efficient heat transfer.

WO2026118616A1 Publication Date: 2026-06-11GREE ELECTRIC APPLIANCE INC OF ZHUHAI
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
GREE ELECTRIC APPLIANCE INC OF ZHUHAI
Filing Date
2025-09-15
Publication Date
2026-06-11

AI Technical Summary

⚠Technical Problem

When the existing heat exchange tubes are bare tubes, a stable flow boundary layer of thickness is easily generated, resulting in low heat transfer efficiency.

⚗Method used

Multiple first heat exchange structures are arranged on the outer circumferential surface of the heat exchange tube, including heat exchange main body and turbulence section connected at an angle, to increase the heat exchange area, and to disturb the flow of the second working fluid through the turbulence section, thereby destroying the flow boundary layer and promoting turbulent motion.

🎯Benefits of technology

This improved the heat transfer coefficient and efficiency of the heat exchange tubes, enabling efficient heat transfer between the first and second working fluids and reducing heat transfer distance and heat loss.

✦ Generated by Eureka AI based on patent content.

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Abstract

A heat exchange tube (11), a heat exchange device (1), a cascade unit, a combined cooling and heating system, and a control method. The heat exchange tube (11) comprises a tube body (111) and first heat exchange structures. A first channel for accommodating a first working medium is provided in the tube body (111). The number of first heat exchange structures is greater than one, and the plurality of first heat exchange structures are arranged on the outer peripheral surface of the tube body (111) and make contact with a second working medium for heat exchange. The first heat exchange structures each comprise a heat exchange main body (112) and a flow-disturbing portion (113) which are connected at an angle.
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