A ground source heat pump energy pile
By combining the design of double-layer pile cylinders and spiral heat exchange tubes, the problem of insufficient heat exchange area of existing ground source heat pump energy piles is solved, achieving more efficient heat exchange and saving construction costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG ZHENGDA PIPE PILE CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-06-26
AI Technical Summary
The existing ground source heat pump energy piles have limited heat exchange area, which affects heat exchange efficiency.
The system adopts a double-layer pile structure, with a cavity formed between the outer and inner piles. The combination design of inner and outer spiral heat exchange tubes and heat exchange plates increases the heat exchange area and efficiency.
By using both inner and outer piles for heat exchange with the soil, the heat exchange area and efficiency are significantly improved, reducing the cost of underground drilling construction.
Smart Images
Figure CN224415410U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of ground source heat pump energy piles, and in particular to a ground source heat pump energy pile. Background Technology
[0002] Geothermal piles are prefabricated components that integrate a heat exchange system into the pile foundation of a building. They achieve heating and cooling functions by exchanging heat with the surrounding soil through pre-embedded pipes. Their core structure includes prefabricated concrete or steel pipe piles with U-shaped, spiral, or other heat exchange pipes inside, using circulating water as a medium to transfer geothermal energy. Compared to traditional ground source heat pump systems, geothermal piles can reduce underground drilling costs by 30%-50% and save underground space.
[0003] However, existing ground source heat pump energy piles can only exchange heat through the outer surface of the energy pile, resulting in a limited heat exchange area and affecting heat exchange efficiency.
[0004] Therefore, it is essential to invent a ground source heat pump energy pile that can increase the heat exchange area. Utility Model Content
[0005] To solve the above-mentioned technical problems, the present invention provides a ground source heat pump energy pile with the following technical solution: a ground source heat pump energy pile, comprising an outer pile cylinder and an inner pile cylinder, wherein: the outer pile cylinder is coaxially sleeved and fixedly installed outside the inner pile cylinder, and a cavity is formed between the outer pile cylinder and the inner pile cylinder, and a heat exchange structure is fixedly installed in the cavity;
[0006] The heat exchange structure includes an outer spiral heat exchange tube and an inner spiral heat exchange tube. The outer spiral heat exchange tube is closely attached to the inner wall of the outer pile tube and is fixedly connected to the inner wall of the outer pile tube. The inner spiral heat exchange tube is sleeved on the outer wall of the inner pile tube and is fixedly connected to the outer wall of the inner pile tube.
[0007] The bottom end of the outer spiral heat exchange tube is fixedly connected to the bottom end of the inner spiral heat exchange tube;
[0008] The top end of the external spiral heat exchange tube is fixedly installed with a liquid inlet pipe, and the other end of the liquid inlet pipe extends out of the cavity;
[0009] A liquid outlet pipe is fixedly installed at the top end of the inner spiral heat exchange tube, and the other end of the liquid outlet pipe extends out of the cavity.
[0010] Several heat exchange fins are uniformly fixedly installed on the outer surface of the outer pile cylinder.
[0011] Several heat exchange fins are uniformly fixedly installed on the inner surface of the inner pile cylinder.
[0012] A plurality of heat exchange plates are uniformly and fixedly installed between the outer spiral heat exchange tube and the inner spiral heat exchange tube, and the heat exchange plates are fixedly connected to the outer pile tube and the inner pile tube.
[0013] The outer pile tube, inner pile tube, cavity, outer spiral heat exchange tube, inner spiral heat exchange tube, liquid inlet pipe, liquid outlet pipe, heat exchange plate one, heat exchange plate two and heat exchange plate three are all treated with anti-corrosion measures.
[0014] Compared with the prior art, the advantages of this utility model are:
[0015] The overall design of this utility model enables heat exchange not only from the outer surface of the outer pile cylinder but also from the inner surface of the inner pile cylinder, thereby greatly increasing the heat exchange area and heat exchange efficiency. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0017] Figure 2 This is a partial cross-sectional view of the outer pile tube structure of this utility model.
[0018] Figure 3 This is a schematic diagram of the structure of the outer spiral heat exchanger tube and the inner spiral heat exchanger tube of this utility model.
[0019] In the picture:
[0020] 1. Outer pile tube, 2. Inner pile tube, 3. Cavity, 4. Outer spiral heat exchange tube, 5. Inlet pipe, 6. Outlet pipe, 7. Heat exchange plate one, 8. Heat exchange plate two, 9. Heat exchange plate three, 10. Detailed Implementation
[0021] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.
[0022] In the description of the embodiments, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of the utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in the present utility model based on the specific circumstances.
[0023] The present invention will be further described below with reference to the accompanying drawings:
[0024] Example
[0025] Reference Figure 1-3 A ground source heat pump energy pile includes an outer pile cylinder 1 and an inner pile cylinder 2, wherein: the outer pile cylinder 1 is coaxially sleeved and fixedly installed outside the inner pile cylinder 2, and a cavity 3 is formed between the outer pile cylinder 1 and the inner pile cylinder 2. A heat exchange structure is fixedly installed in the cavity 3. Through the setting of this structure, when pre-buried underground, the heat exchange structure can be protected by the outer pile cylinder 1 and the inner pile cylinder 2. At the same time, after pre-buried, the outer surface of the outer pile cylinder 1 and the inner surface of the inner pile cylinder 2 can both contact the soil, thereby increasing the heat exchange area of the heat exchange structure.
[0026] Specifically, the heat exchange structure includes an outer spiral heat exchange tube 4 and an inner spiral heat exchange tube 5. The outer spiral heat exchange tube 4 is closely attached to the inner wall of the outer pile cylinder 1 so that the outer spiral heat exchange tube 4 can exchange heat with the soil through the outer pile cylinder 1 and is fixedly connected to the inner wall of the outer pile cylinder 1. The inner spiral heat exchange tube 5 is sleeved on the outer wall of the inner pile cylinder 2 so that the inner spiral heat exchange tube 5 can exchange heat with the soil through the inner pile cylinder 2 and is fixedly connected to the outer wall of the inner pile cylinder 2.
[0027] Specifically, the bottom end of the outer spiral heat exchange tube 4 is fixedly connected to the bottom end of the inner spiral heat exchange tube 5 so that the heat exchange medium can flow in the outer spiral heat exchange tube 4 and the inner spiral heat exchange tube 5.
[0028] Specifically, an inlet pipe 6 is fixedly installed at the top of the outer spiral heat exchange tube 4, and the other end of the inlet pipe 6 extends out of the cavity 3 so that the required heat exchange medium can be injected into the outer spiral heat exchange tube 4 through the inlet pipe 6 to exchange heat with the soil.
[0029] Specifically, an outlet pipe 7 is fixedly installed at the top of the inner spiral heat exchange tube 5. The other end of the outlet pipe 7 extends out of the cavity 3 so that the heat exchange medium injected into the outer spiral heat exchange tube 4 can enter the inner spiral heat exchange tube 5 to continue to exchange heat with the soil, and finally be discharged through the outlet pipe 7.
[0030] Specifically, several heat exchange plates 9 are uniformly fixed on the outer surface of the outer pile cylinder 1. The heat exchange plates 9 are T-shaped to increase the contact area with the soil and improve the locking ability with the soil, thereby ensuring the stability of the whole after pre-embedding.
[0031] Specifically, several heat exchange plates 310 are uniformly fixedly installed on the inner surface of the inner pile cylinder 2. The heat exchange plates 310 are T-shaped to increase the contact area with the soil and improve the locking ability with the soil, thereby ensuring the overall stability after pre-embedding.
[0032] Specifically, several heat exchange plates 8 are uniformly fixedly installed between the outer spiral heat exchange tube 4 and the inner spiral heat exchange tube 5. The heat exchange plates 8 are fixedly connected to the outer pile tube 1 and the inner pile tube 2, so as to increase the contact area between the outer spiral heat exchange tube 4 and the inner spiral heat exchange tube 5 and the outer pile tube 1 and the inner pile tube 2 through the heat exchange plates 8, and at the same time improve the stability and strength between the outer spiral heat exchange tube 4 and the inner spiral heat exchange tube 5 and the outer pile tube 1 and the inner pile tube 2.
[0033] Specifically, the outer pile tube 1, inner pile tube 2, cavity 3, outer spiral heat exchange tube 4, inner spiral heat exchange tube 5, liquid inlet pipe 6, liquid outlet pipe 7, heat exchange plate 1 8, heat exchange plate 2 9, and heat exchange plate 3 10 are all treated with anti-corrosion measures.
[0034] Corrosion protection uses existing technologies, such as organic coatings like paint and resin, or by electroplating, hot-dip galvanizing, or other methods to cover the surface with corrosion-resistant metal layers like zinc and chromium.
[0035] In this embodiment, when in use, the local source heat pump energy pile is pre-buried underground, and soil or concrete is filled in the inner pile cylinder 2 so that the inner surface of the inner pile cylinder 2 can contact the soil for heat exchange, or heat exchange can be achieved through the contact between concrete and soil.
[0036] Here, we take the soil filling in the inner pile tube 2 as an example:
[0037] Then, the required heat exchange medium is injected into the outer spiral heat exchange tube 4 through the liquid inlet pipe 6. At this time, the heat exchange medium exchanges heat with the soil through the outer pile tube 1. When the heat exchange medium flows into the inner spiral heat exchange tube 5, the heat exchange medium continues to exchange heat with the soil through the inner pile tube 2. Finally, the heat exchange medium flows out through the liquid outlet pipe 7.
[0038] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.
Claims
1. A ground source heat pump energy pile, characterized in that: It includes an outer pile tube (1) and an inner pile tube (2), wherein: the outer pile tube (1) is coaxially sleeved and fixedly installed outside the inner pile tube (2), and a cavity (3) is formed between the outer pile tube (1) and the inner pile tube (2), and a heat exchange structure is fixedly installed in the cavity (3); The heat exchange structure includes an outer spiral heat exchange tube (4) and an inner spiral heat exchange tube (5). The outer spiral heat exchange tube (4) is closely attached to the inner wall of the outer pile tube (1) and is fixedly connected to the inner wall of the outer pile tube (1). The inner spiral heat exchange tube (5) is sleeved on the outer wall of the inner pile tube (2) and is fixedly connected to the outer wall of the inner pile tube (2). The bottom end of the outer spiral heat exchange tube (4) is fixedly connected to the bottom end of the inner spiral heat exchange tube (5); The top end of the external spiral heat exchange tube (4) is fixedly installed with a liquid inlet pipe (6), and the other end of the liquid inlet pipe (6) extends out from the cavity (3); The top end of the inner spiral heat exchange tube (5) is fixedly installed with a liquid outlet pipe (7), and the other end of the liquid outlet pipe (7) extends out from the cavity (3).
2. The ground source heat pump energy pile as described in claim 1, characterized in that: Several heat exchange plates (9) are uniformly fixedly installed on the outer surface of the outer pile tube (1).
3. The ground source heat pump energy pile as described in claim 1, characterized in that: Several heat exchange plates (10) are uniformly fixedly installed on the inner surface of the inner pile cylinder (2).
4. A ground source heat pump energy pile as described in claim 1, characterized in that: A number of heat exchange plates (8) are uniformly fixed between the outer spiral heat exchange tube (4) and the inner spiral heat exchange tube (5), and the heat exchange plates (8) are fixedly connected to the outer pile tube (1) and the inner pile tube (2).
5. A ground source heat pump energy pile as described in claim 1, characterized in that: The outer pile tube (1), inner pile tube (2), cavity (3), outer spiral heat exchange tube (4), inner spiral heat exchange tube (5), liquid inlet pipe (6) and liquid outlet pipe (7) are all treated with anti-corrosion measures.