A type of one-piece injection molded square inner four-way electrofusion double U-bend for ground source heat pumps
The square inner four-way electrofusion double U-bend, which is integrally injection molded, solves the welding defects and difficulty of running it into the well of traditional ground source heat pump bends, and achieves high efficiency in running into the well and heat exchange performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LUAN ZHONGCAI PIPELINE TECH CO LTD
- Filing Date
- 2025-09-12
- Publication Date
- 2026-07-31
AI Technical Summary
Traditional ground source heat pump elbows are prone to defects such as incomplete welding, over-welding, and cold material. The circular structure has high frictional resistance in vertical deep wells and lacks flow guidance design, which leads to water, gas and slag accumulation in the well, increasing the difficulty of going down into the well and the risk of blockage.
The square-shaped internal four-way electrofusion double U-bend, which is integrally injection molded, includes a four-way double U-bend and a single-cavity double U-bend. It uses an intermediate insert design made of engineering plastic or metal materials, and the internal holes are in a specific shape. It avoids welding defects by electrofusion connection and injection molding. The square structure is designed with smooth transition grooves to facilitate well lowering and impurity settling.
It effectively avoids welding defects, reduces well running resistance, improves construction efficiency, increases flow rate, reduces water flow resistance, improves heat exchange efficiency, and prevents pipeline blockage.
Smart Images
Figure CN224579968U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of ground source heat pump technology, specifically relating to an integrated injection-molded square inner four-way electrofusion double U-bend for ground source heat pumps. Background Technology
[0002] Ground source heat pumps primarily utilize underground soil as a heat or cold source, circulating the heat transfer medium, typically water or antifreeze, through buried PE pipes for heat exchange. Electrofusion double U-bends are commonly used and critical components for connecting PE ground source heat pump pipes. They are mainly used for reversing connections in the bottom pipe sections of vertical buried ground source heat pump systems, and are suitable for central air conditioning and heating systems in office buildings, residential communities, hospitals, and other buildings.
[0003] Traditional ground source heat pump elbows use an upper and lower welding process, which is prone to defects such as incomplete welding, over-welding, and cold material during the welding process, resulting in insufficient joint strength. Traditional elbows are mostly circular structures, and when lowered into vertical deep wells, the frictional resistance between the circular outer surface and the well wall is relatively large. In addition, the bottom and sides lack flow guiding design, which can easily lead to the accumulation of water, gas, mud, and slag in the well, increasing the difficulty of lowering the well, and may even cause jamming or blockage, affecting the construction progress. To solve these problems, we propose an integrated injection-molded square inner four-way electrofusion double U elbow for ground source heat pumps. Summary of the Invention
[0004] The purpose of this utility model is to provide an integrated injection-molded square inner four-way electrofusion double U-bend for ground source heat pumps, which can avoid the leakage and risks caused by incomplete welding, over-welding, cold material, and hot throwing of products at the traditional upper and lower welding joints. It is more conducive to drainage, ventilation, mud removal, and slag removal in wells, reduces resistance, improves efficiency, reduces water flow resistance, increases flow rate, improves heat exchange efficiency, facilitates the sedimentation of impurities in water, and prevents and reduces pipeline blockage.
[0005] The specific technical solution adopted by this utility model is as follows: A one-piece injection-molded square internal four-way electrofusion double U-bend for ground source heat pumps includes a four-way double U-bend and a single-cavity double U-bend. The four-way double U-bend includes four first electrofusion sleeves, a first square electrofusion double U-bend body, and a first intermediate insert. The single-cavity double U-bend includes four second electrofusion sleeves, a second square electrofusion double U-bend body, and four second intermediate inserts.
[0006] In a preferred embodiment, one end of each of the four first electrofusion sleeves is connected to the PE ground source heat pump pipe via electrofusion socket connection, and the other end of each of the four first electrofusion sleeves is connected to the four sockets at the head of the first square electrofusion double U-bend main body product via electrofusion socket connection.
[0007] In a preferred embodiment, one end of each of the four second electrofusion sleeves is connected to the PE ground source heat pump pipe via electrofusion socket, and the other end of each of the four second electrofusion sleeves is connected to the four sockets at the head of the second square electrofusion double U-bend main body product via electrofusion socket.
[0008] In a preferred embodiment, the internal holes of the first intermediate insert are arranged in an X-shaped linear matrix array, with multiple waist-shaped holes arranged and placed inside the four-way double U-bend, and then plastic-coated.
[0009] In a preferred embodiment, the internal holes of the second intermediate insert are arranged in a rectangular linear matrix array, with multiple waist-shaped holes arranged and placed inside the single-cavity double U-bend, and then plastic-coated.
[0010] In a preferred embodiment, the materials of the first intermediate insert and the second intermediate insert include engineering plastics and metal materials, including POM, stainless steel, and aluminum alloy.
[0011] The technical effects achieved by this utility model are as follows: The product is injection molded in one piece, which can avoid the leakage and risks caused by traditional upper and lower welding joints, such as incomplete welding, over-welding, cold material, and hot throwing of the product.
[0012] Compared to the traditional circular structure, the square structure is more conducive to the product being lowered into the well in vertical deep well conditions. At the same time, the square product has smooth transition grooves on the bottom and sides, which is more conducive to drainage, ventilation, mud removal and slag removal when lowering into the well, reducing resistance and improving efficiency. Compared to the traditional dual-chamber structure with two inlets and two outlets, this four-way connection is a single-chamber structure. The specific number of inlets and outlets can be selected by the customer. At the same time, the single-chamber structure has a large capacity, reduces water flow resistance, increases flow rate, improves heat exchange efficiency, and is conducive to the sedimentation of impurities in the water, preventing and reducing pipe blockage. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of an integrally injection-molded square inner four-way electrofusion double U-bend for a ground source heat pump according to this utility model. Figure 2 This is a schematic diagram of a four-way double U-bend for a ground source heat pump, which is an integrally injection-molded square inner four-way electrofusion double U-bend according to this utility model. Figure 3 This is a schematic diagram of a single-cavity double U-bend of a square internal four-way electrofusion double U-bend for a ground source heat pump, which is an integrally injection molded square internal four-way electrofusion double U-bend of this utility model.
[0014] In the figure: 1. Four-way double U-bend, 2. Single-cavity double U-bend, 3. First electrofusion sleeve, 4. First square electrofusion double U-bend body, 5. First intermediate insert, 6. Second electrofusion sleeve, 7. Second square electrofusion double U-bend body, 8. Second intermediate insert. Detailed Implementation
[0015] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.
[0016] Please see Figure 1-3 As shown, this utility model provides an integrated injection-molded square internal four-way electrofusion double U-bend for ground source heat pumps, including a four-way double U-bend 1 and a single-cavity double U-bend 2. The four-way double U-bend 1 includes four first electrofusion sleeves 3, a first square electrofusion double U-bend body 4, and a first intermediate insert 5. The single-cavity double U-bend 2 includes four second electrofusion sleeves 6, a second square electrofusion double U-bend body 7, and four second intermediate inserts 8.
[0017] One end of each of the four first electrofusion sleeves 3 is connected to the PE ground source heat pump pipe by electrofusion socket, and the other end of each of the four first electrofusion sleeves 3 is connected to the four sockets at the head of the first square electrofusion double U-bend body 4 by electrofusion socket.
[0018] One end of each of the four second electrofusion sleeves 6 is connected to the PE ground source heat pump pipe by electrofusion socket, and the other end of each of the four second electrofusion sleeves 6 is connected to the four sockets at the head of the second square electrofusion double U-bend body 7 by electrofusion socket.
[0019] The internal holes of the first intermediate insert 5 are arranged in an X-shaped linear matrix array, with multiple waist-shaped holes, and are placed inside the four-way double U-bend 1 and molded with plastic.
[0020] The internal holes of the second intermediate insert 8 are arranged in a rectangular linear matrix array, with multiple waist-shaped holes, and are placed inside the single-cavity double U-bend 2 and molded with plastic.
[0021] The materials of the first intermediate insert 5 and the second intermediate insert 8 include engineering plastics and metal materials, including POM, stainless steel and aluminum alloy.
[0022] In this invention, the product is integrally injection molded, which can avoid the leakage and risks caused by incomplete welding, over-welding, cold material, and hot throwing of the product at the traditional upper and lower welding joints.
[0023] Compared to the traditional circular structure, the square structure is more conducive to the product being lowered into the well in vertical deep well conditions. At the same time, the square product has smooth transition grooves on the bottom and sides, which is more conducive to drainage, ventilation, mud removal and slag removal when lowering into the well, reducing resistance and improving efficiency. Compared to the traditional dual-chamber structure with two inlets and two outlets, this four-way connection is a single-chamber structure. The specific number of inlets and outlets can be selected by the customer. At the same time, the single-chamber structure has a large capacity, reduces water flow resistance, increases flow rate, improves heat exchange efficiency, and is conducive to the sedimentation of impurities in the water, preventing and reducing pipe blockage.
[0024] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.
Claims
1. An integrally injection-molded square inner four-way electric fusion double-U bend for a ground source heat pump, characterized by: The four-way double U-bend (1) and the single-cavity double U-bend (2) are included. The four-way double U-bend (1) includes four first electrofusion sleeves (3), a first square electrofusion double U-bend body (4), and a first intermediate insert (5). The single-cavity double U-bend (2) includes four second electrofusion sleeves (6), a second square electrofusion double U-bend body (7), and four second intermediate inserts (8).
2. The integrally injection molded square cross-section four-way electric fusion double-U bend for a ground source heat pump according to claim 1, characterized in that: One end of each of the four first electrofusion sleeves (3) is connected to the PE ground source heat pump pipe by electrofusion socket, and the other end of each of the four first electrofusion sleeves (3) is connected to the four sockets at the head of the first square electrofusion double U-bend body (4) by electrofusion socket.
3. The integrally injection molded square cross-section four-way electric fusion double-U bend for ground source heat pump of claim 1, wherein: One end of each of the four second electrofusion sleeves (6) is connected to the PE ground source heat pump pipe by electrofusion socket, and the other end of each of the four second electrofusion sleeves (6) is connected to the four sockets at the head of the second square electrofusion double U-bend body (7) by electrofusion socket.
4. The integrally injection molded square cross-section four-way electric fusion double-U bend for ground source heat pump of claim 1, wherein: The internal holes of the first intermediate insert (5) are arranged in an X-shaped linear matrix array, with multiple waist-shaped holes arranged and placed inside the four-way double U-bend (1) and molded with plastic.
5. The integrally injection molded square cross-section four-way electric fusion double U-bend for ground source heat pump of claim 1, wherein: The second intermediate insert (8) has a total of square-shaped linear matrix array of internal holes, with multiple waist-shaped holes arranged and placed inside the single-cavity double U-bend (2) and molded with plastic.
6. The integrally injection molded square cross-section four-way electric fusion double U-bend for ground source heat pump of claim 1, wherein: The materials of the first intermediate insert (5) and the second intermediate insert (8) include engineering plastics and metal materials, including POM, stainless steel and aluminum alloy.