Underground heat exchanger for ground source heat pump unit

By designing an independent circulation pump and modular structure in the downhole heat exchanger, efficient heat exchange between groundwater and heat source water is achieved, solving the problem of low efficiency at the top of the downhole heat exchanger and improving the overall heat exchange efficiency.

CN120799728APending Publication Date: 2025-10-17SICHUAN XINHUILONG ELECTRIC POWER ENGINEERING CO LTD
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Patent Information

Application Number
CN202511193631.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-08-25
Publication Date
2025-10-17

AI Technical Summary

Technical Problem

The top heat exchange efficiency of the existing downhole heat exchanger is low. Groundwater continuously exchanges heat with the heat source water during its upward flow, resulting in a decrease in temperature and poor top efficiency.

Method used

A downhole heat exchanger is designed, which includes a water inlet module, a drainage module, a heat exchange module and a circulation pump. The circulation pump drives groundwater into multiple heat exchange mechanisms to exchange heat with heat source water, and then discharges it through an independent drainage module to ensure that the groundwater temperature in each heat exchange mechanism is basically consistent, maintaining a large temperature difference to improve efficiency.

Benefits of technology

The groundwater is driven into each heat exchange mechanism through an independent circulation pump to ensure a large temperature difference between the groundwater and the heat source water in each heat exchanger, thereby improving the overall heat exchange efficiency of the downhole heat exchanger.

✦ Generated by Eureka AI based on patent content.
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Abstract

The invention provides an underground heat exchanger for a ground source heat pump unit, which belongs to the technical field of ground source heat pumps and comprises a water inlet module, a water drainage module, a heat exchange module, a circulating pump and a heat source water circulation module. The heat exchange module comprises a shell and a heat exchange mechanism arranged in the shell. The number of the heat exchange mechanisms is at least two, and the at least two heat exchange mechanisms are vertically arranged in the shell. One end of the heat exchange mechanism is connected with the water inlet module, and the other end is connected with the drainage module. The circulating pump is arranged in the water inlet module or the water outlet module; the circulating pump is used for driving underground water to enter the heat exchange mechanism from the water inlet module and be drained from the drainage module. The heat source water circulation module is connected with the shell and used for conveying heat source water into the shell and recycling the heat source water in the shell so that the heat source water can flow between the shell and the heat exchange mechanism, and therefore the heat source water exchanges heat with the heat exchange mechanism.
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