Ground source heat pump U-shaped connecting head with underground temperature detection function and installation method

Abstract

The application provides a ground source heat pump U-shaped connecting head with underground temperature detection function and a mounting method. The U-shaped connecting head comprises a conical hollow base, a U-shaped pipe joint and a probe type temperature sensor arranged in the hollow base, a control line protection pipe joint is arranged on the upper end surface of the conical hollow base, the probe type temperature sensor is arranged at the position corresponding to the control line protection pipe joint through a spring launching device, the probe end of the probe type temperature sensor is vertically downward, and a hard tip is arranged on the probe end of the temperature sensor; a stress protection cover is arranged on the part of the hollow base shell opposite to the probe hard tip, and the stress protection cover is separated from the hollow base shell under the action of external force. The temperature sensor is sent into the underground together with the base when the well is drilled, and the temperature sensor is pushed into the soil through the spring launching device, so that the accurate measurement of the underground temperature is realized, and the underground energy source is effectively utilized for a long time.

Description

Technical Field

[0001] This invention relates to the field of ground source heat pump technology, and in particular to a ground source heat pump U-shaped connector with underground temperature detection function and its installation method. Background Technology

[0002] The key feature of ground source heat pump technology is that it uses shallow soil as a heat source and cold source, storing heat in the soil or extracting heat from the soil to drive the heat pump for cooling or heating. To reduce the land area required for heat storage, ground source heat pumps typically use vertical buried pipes for heat exchange with the soil. To ensure the long-term stable operation of ground source heat pumps, it is necessary to effectively and accurately monitor soil temperature, calculate the soil's heat storage capacity, and thus formulate effective ground source heat pump operation strategies. Currently, ground source heat pump technology is widely used in my country, making a significant contribution to energy conservation. However, it also faces many problems, the primary one being the balance of heating and cooling loads. The varying duration of use in winter and summer leads to uneven heat storage and extraction from the soil, resulting in soil temperature imbalances, poor energy efficiency of the ground source heat pump, or even its unusability, ultimately shortening the lifespan of underground energy.

[0003] my country spans 49° of latitude from north to south, a significant geographical range. Most of the country lies in the North Temperate Zone, while some areas in the south are in the subtropical zone, resulting in substantial temperature differences between the north and south. The basic principle of ground source heat pump technology is to extract heat from the ground in winter, then transfer the cooled energy from the surface back underground for storage. In summer, the cooled energy is extracted again, and the heated energy from the surface is transferred back underground for use in winter. However, in southern my country, winters are short and hot, resulting in less extracted heat; summers require more cooling energy, and the stored heat is also relatively abundant. Prolonged operation inevitably leads to excessively high underground temperatures, reducing cooling efficiency. In the north, the opposite is true: less underground heat results in reduced heating efficiency. Therefore, accurately monitoring underground soil temperature to provide data support for balancing underground heating and cooling loads is currently the core issue for effectively ensuring the performance of ground source heat pumps and the long-term effective utilization of underground energy.

[0004] For the most widely used vertical buried pipe ground source heat pumps, the burial depth typically reaches 100-120 mm. How to install the sensor in the deep hole while ensuring construction quality and preventing damage to the sensor during construction is currently a major challenge for ground source heat pumps. The common method currently used is to bind the temperature sensor to a U-shaped pipe and press it down together with the U-shaped pipe. This method increases the resistance of the pipe installation, and the friction between the sensor and the borehole wall easily damages the sensor; once damaged, it cannot be repaired. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention provides a ground source heat pump U-shaped connector with underground temperature detection function and an installation method. This invention can simply and effectively lower the temperature monitoring device into the underground borehole without adding extra construction materials and procedures, while ensuring construction quality, so as to provide data support for balancing underground heating and cooling loads.

[0006] To achieve the above-mentioned technical objectives, the present invention provides a ground source heat pump U-shaped connector with underground temperature detection function. The connector structure includes a conical hollow base and a U-shaped pipe joint placed inside the hollow base. An elastic launching device and a probe-type temperature sensor are provided inside the conical hollow base. A control line protection pipe joint is provided on the upper end face of the conical hollow base. The probe-type temperature sensor is installed at the position corresponding to the control line protection pipe joint through the spring launching device, and the probe end of the probe-type temperature sensor is vertically downward, with a hard tip at the probe end. A force-bearing protective cover is provided on the hollow base shell facing the hard tip of the probe. The force-bearing protective cover separates from the hollow base shell under the action of external force, and a hole matching the probe-type temperature sensor is formed on the hollow base.

[0007] The spring launching device includes an upper force plate, a lower force plate, and a launching spring. The upper force plate is fixed to one end of the control line protection tube connector near the hollow base. The upper and lower force plates are connected by a fusible pull wire. The launching spring is compressed and placed between the upper and lower force plates, with its upper and lower ends connected to the upper and lower force plates respectively. Both ends of the fusible pull wire are provided with energized wires, which are led out through the control line protection tube connector. The probe-type temperature sensor is installed on the lower force plate, and its signal line is led out through the control line protection tube connector. When the fusible pull wire is energized and disconnected, the launching spring springs open, causing the probe-type temperature sensor to push the force protection cover vertically downward and extend out of the hollow base.

[0008] The preferred technical solution of the present invention is as follows: an insulating head is provided at both ends of the fuse pull wire, and the insulating heads at both ends of the fuse pull wire are fixed at the center positions of the upper force plate and the lower force plate, respectively, and the fuse pull wire is straightened after fixing; two current-carrying wires pass through the insulating heads and are connected to the fuse pull wire.

[0009] A preferred technical solution of the present invention is as follows: the edge of the stress-bearing protective cover is connected to the outer shell of the hollow base by a point break line; or one side of the stress-bearing protective cover is hinged to the outer shell of the hollow base, and the other side is snapped into the outer shell of the hollow base; or the stress-bearing protective cover is provided with multiple break lines that are easy to fall off when subjected to force from the inside out, and the stress-bearing protective cover is provided with an outward protrusion angle along the break lines, so that it is easy to fall off when subjected to force.

[0010] The preferred technical solution of the present invention is as follows: one or two U-shaped pipe joints are provided, and a buried pipe joint matching and connected to the pipe opening of the U-shaped pipe joint is provided on the upper end face of the hollow base. Both pipe openings of each U-shaped pipe joint are provided with buried pipe joints; the control line protection pipe joint is staggered from the buried pipe joints, and a top pipe groove is provided at the center of the upper end face of the hollow base.

[0011] The preferred technical solution of the present invention is as follows: the probe-type temperature sensor is provided with two signal lines and a power supply line. The power supply line is connected to the energized conductor at the upper end of the fuse pull line, and the power supply line is connected in parallel with the fuse pull line. Before the fuse pull line melts, the probe-type temperature sensor is short-circuited in parallel.

[0012] The preferred technical solution of the present invention is as follows: the hollow base is a plastic base, and the rigid tip is a conical metal tip; the area of ​​the force-bearing protective cover is larger than the cross-section of the probe of the probe-type temperature sensor but smaller than the cross-section of the body of the probe-type temperature sensor; a force-bearing groove is provided at the position of the force-bearing protective cover opposite the conical tip to prevent the conical head from sliding; and after the force-bearing protective cover falls off or breaks, the probe of the probe-type temperature sensor extends out of the hollow base.

[0013] The preferred technical solution of the present invention is that the hard tip and the sensor probe are an integral structure or a separate structure. When the hard tip and the probe are separate structures, the hard tip and the probe are fixedly bonded together.

[0014] The preferred technical solution of the present invention is as follows: the fuse pull wire is made of solder wire or low current fuse, and is externally wrapped with or not wrapped with nylon wire. When energized, the fuse pull wire heats up and melts completely.

[0015] The present invention also provides an installation method for a ground source heat pump U-shaped connector with underground temperature detection function as described in any one of claims 1 to 8, wherein the ground source heat pump U-shaped connector with underground temperature detection function is used for end connection of the vertical buried pipe of the ground source heat pump, and the specific steps are as follows:

[0016] S1 inserts the assembled ground source heat pump U-shaped connector with underground temperature detection function into the buried hole during well drilling and pipe laying.

[0017] S2 connects the ground source heat pump vertical buried pipe to the buried pipe joint of the U-shaped connector, installs the control line protection pipe at the control line protection pipe joint, and leads the two energized wires and the signal line of the probe-type temperature sensor out to the ground through the control line protection pipe;

[0018] S3 connects the two energized wires leading out from the bottom to the power supply, ensuring that the current carrying capacity is greater than the maximum current of the fuse pull wire, causing the fuse pull wire to break. This activates the spring of the spring launching device, which then launches the probe of the probe-type temperature sensor inside the base through the hollow base and inserts it into the soil, thereby achieving accurate measurement of the underground soil temperature.

[0019] The preferred technical solution of the present invention is as follows: in step S3, the spring launching device is detected by measuring the resistance at both ends of the wire; and when the fuse pull wire is disconnected, the probe temperature sensor will be powered on and the signal of the probe temperature sensor will be output to the external control terminal through the signal line.

[0020] This invention includes a U-shaped head, a temperature acquisition unit, and a transmitting device. The U-shaped head includes a conical hollow base and a U-shaped tube head placed on the base. The temperature acquisition unit and the transmitting device are also installed inside the base and positioned among the multiple tube heads, without affecting the tube head connection. The temperature acquisition unit is a temperature sensor. The transmitting device is a compression spring, which is compressed under the action of a fusible pull wire and extends to emit light from the temperature sensor when the fusible pull wire breaks. The fusible pull wire can be a solder wire or other fusible wire that meets the tensile strength requirements, or it can be a low-current fuse that can automatically melt under high current. To increase the strength of the fuse, nylon wire can be wrapped around the fuse, which can also burn through during the fuse's heating process. An insulating block is directly installed between the fusible pull wire and the transmitting spring's force plate to prevent short circuits between the force spring and the fusible pull wire. The fused power-carrying wire is shared with the power supply line of the temperature sensor. The temperature sensor is only powered on and works after the fused wire is broken. This ensures that the temperature sensor only works after it enters the soil, and the working signal of the temperature sensor can be used to determine whether the fused wire is broken.

[0021] This invention combines a temperature sensor with an existing U-shaped head, and sends the U-shaped head and temperature sensor underground during well drilling and pipe laying. The temperature sensor is then pushed into the soil by a spring-launching device, thereby achieving accurate measurement of underground temperature. This provides data support for balancing underground heating and cooling loads, which is beneficial for ensuring the effectiveness of ground source heat pumps and the long-term effective utilization of underground energy. Attached Figure Description

[0022] Figure 1 This is a front cross-sectional view of the present invention;

[0023] Figure 2 This is a top view of the present invention;

[0024] Figure 3 This is a schematic diagram showing that the fuse wire of the present invention has not been disconnected;

[0025] Figure 4This is an enlarged schematic diagram of the elastic launching device in this invention;

[0026] Figure 5 This is a schematic diagram showing the probe of the temperature sensor extending out of the hollow base after the fusible cable breaks in this invention.

[0027] Figure 6 This is a schematic diagram of the stress protection cover in the embodiment;

[0028] Figure 7 This is a magnified schematic diagram of the stress state of the stress-bearing protective cover.

[0029] In the diagram: 1—Hollow base, 100—Buried pipe connector, 101—Pipe top groove, 2—U-shaped pipe connector, 3—Control line protection pipe connector, 4—Elastic launching device, 400—Upper force plate, 401—Lower force plate, 402—Launch spring, 403—Fuse pull wire, 404—Electrified wire, 405—Insulated head, 5—Probe-type temperature sensor, 500—Probe, 501—Hard tip, 502—Signal line, 503—Power supply line, 6—Force protection cover, 600—Force groove. Detailed Implementation

[0030] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples. Figures 1 to 5 All accompanying drawings are simplified versions of embodiments and are intended only to clearly and concisely illustrate the embodiments of the present invention. The technical solutions shown in the drawings below are specific solutions of embodiments of the present invention and are not intended to limit the scope of the claimed invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0031] In the description of this invention, it should be understood that the terms "upper," "lower," "inner," "outer," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are used only for the convenience of describing this invention and 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, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] The embodiment provides a ground source heat pump U-shaped connector with underground temperature detection function, such as Figures 1 to 7As shown, the device includes a conical hollow base 1 and a U-shaped pipe connector 2 placed inside the hollow base 1. The hollow base 1 is a plastic base. An elastic transmitting device 4 and a probe-type temperature sensor 5 are installed inside the conical hollow base 1. Two buried pipe connectors 100 and one control line protection pipe connector 3 are located on the upper surface of the hollow base 1. The two buried pipe connectors 100 and the control line protection pipe connector 3 are arranged in an equilateral triangle on the upper surface of the hollow base 1 to avoid the influence of the U-shaped pipe on the temperature sensor and transmitting device, and to prevent damage to the temperature sensor during pipe jacking construction. A pipe jacking groove 101 is provided in the middle of the upper surface of the hollow base 1. The probe-type temperature sensor 5 is installed at the corresponding control line protection tube connector 3 via the spring launching device 4, and the probe end of the probe-type temperature sensor 5 is vertically downward. A hard tip 501 is provided at the end of the probe 500 of the probe-type temperature sensor 5. The hard tip 501 and the sensor probe 500 are an integral structure or a separate structure. When the hard tip 501 and the probe 500 are separate structures, the hard tip 501 and the probe 500 are fixedly bonded together.

[0033] The embodiment provides a ground source heat pump U-shaped connector with underground temperature detection function, such as Figures 1 to 7 As shown, a force-bearing protective cover 6 is provided on the portion of the hollow base 1's outer shell facing the rigid tip 501 of the probe 500. Under external force, the force-bearing protective cover 6 separates from the hollow base 1's outer shell, forming a hole on the hollow base 1 that matches the probe 500 of the probe-type temperature sensor 5. The edge of the force-bearing protective cover 6 is connected to the hollow base 1's outer shell via a point-break line; or one side of the force-bearing protective cover 6 is hinged to the outer shell of the hollow base 1, and the other side is snapped into the outer shell of the hollow base 1; or the force-bearing protective cover 6 is provided with multiple break lines that are easy to detach when subjected to force from the inside out, and the force-bearing protective cover 6 has an outward protrusion angle along the break lines. Figure 6 and Figure 7 As shown, in this embodiment, the stress-bearing protective cover 6 is fixed to the hollow base 1 by a connecting buckle. The stress-bearing protective cover 6 is designed with outward cracking grooves. The principle is that each small plate divided by the cracking grooves converges at the cracking grooves, not on the same plane, and tilts outward at a certain angle (1° in this embodiment). The area of ​​the stress-bearing protective cover 6 is larger than the cross-section of the probe 500 of the probe-type temperature sensor 5, but smaller than the cross-section of the body of the probe-type temperature sensor 5. A stress groove 600 is provided at the position of the stress-bearing protective cover 6 directly opposite the conical tip. The hard tip 501 is a conical metal tip. When the U-shaped head is lowered into the tube, the external force compresses the stress-bearing protective cover 6, and the cracking grooves are compressed and closed. After the U-shaped head is installed in place, the spring launching device launches, and the hard tip 501 of the sensor probe impacts the stress-bearing cover plate from the inside, causing the stress-bearing protective cover 6 to crack, so that the probe 500 of the probe-type temperature sensor 5 can extend out of the hollow base 1 and insert into the ground.

[0034] The embodiment provides a ground source heat pump U-shaped connector with underground temperature detection function, such as Figures 3 to 5 As shown, the spring launching device 4 includes an upper force plate 400, a lower force plate 401, and a launching spring 402. The upper force plate 400 is fixed to one end of the control line protection tube connector 3 near the hollow base 1. The upper force plate 400 and the lower force plate 401 are connected by a fusible pull wire 403. The launching spring 402 is compressed and placed between the upper force plate 400 and the lower force plate 400, with its upper and lower ends connected to the upper force plate 400 and the lower force plate 401, respectively. Both ends of the fusible pull wire 403 are provided with energized wires 404, and the two energized wires 404 are led out through the control line protection tube connector 3. The probe-type temperature sensor 5 is installed on the lower force plate 400, and its signal line is led out through the control line protection tube connector 3. When the fusible pull wire 403 is energized and disconnected, the launching spring 402 springs open, causing the probe-type temperature sensor 5 to push the force protection cover 6 vertically downward and extend it out of the hollow base 1. Insulating heads 405 are provided at both ends of the fuse pull wire 403. The insulating heads 404 at both ends of the fuse pull wire 403 are fixed at the center positions of the upper force plate 400 and the lower force plate 401, respectively, and the fuse pull wire 403 is straightened after fixing. Two energized wires 404 pass through the insulating heads 405 and are connected to the fuse pull wire 403. The probe-type temperature sensor 5 is provided with two signal lines 502 and a power supply line 503. The power supply line 503 is connected to the energized wire at the upper end of the fuse pull wire 403, and the power supply line 503 is connected in parallel with the fuse pull wire 403. Before the fuse pull wire 403 melts, it short-circuits the probe-type temperature sensor 5 in parallel. The fuse pull wire 403 is made of solder wire or low-current fuse, with or without nylon wire wrapped around it. When energized, the fuse pull wire 403 heats up and melts completely.

[0035] This embodiment provides an installation method for a U-shaped connector for a ground source heat pump with underground temperature detection function. The U-shaped connector with underground temperature detection function is used for the end connection of the vertical buried pipe of the ground source heat pump. The specific steps are as follows:

[0036] S1 inserts its assembled U-shaped ground source heat pump connector with underground temperature detection function into the buried hole during well drilling and pipe laying; the method of burying the U-shaped ground source heat pump connector into the hole is the same as the existing installation method of the U-shaped ground source heat pump connector.

[0037] S2 connects the ground source heat pump vertical buried pipe to the buried pipe joint of the U-shaped connector, installs the control line protection pipe at the control line protection pipe joint, and leads the two energized wires and the signal line of the probe-type temperature sensor out to the ground through the control line protection pipe;

[0038] S3 connects the two conductive wires leading out from the bottom to the power supply, ensuring that the current carrying capacity is greater than the maximum current of the fuse pull wire, causing the fuse pull wire to break, thereby releasing the compressed launch spring 402 of the spring launch device 4. The launch spring springs open, pushing the probe-type temperature sensor 5 downward. The probe 500 of the probe-type temperature sensor 5 has a hard tip at its end. At the intersection of the hard tip's launch trajectory and the wall of the hollow base 1, a stress protection cover 6 is set. This cover can be achieved by designing and engraving outward stress lines on the base, making it integrally formed with the base; or it can be made as a separate piece. The cover plate, engraved with stress lines, is fastened to the base with clips. The effect is that when pressed from the outside in, the cover plate is squeezed tightly along the stress lines, and when pressed from the inside out, the cover plate is crushed along the stress lines. The conical tip of the probe-type temperature sensor 5 pierces the stress-bearing protective cover 6 and is inserted into the soil, thereby achieving accurate measurement of the underground soil temperature. The resistance at both ends of the measuring wire is used to detect whether the spring-launching device is firing. When the fuse pull wire is disconnected, the probe-type temperature sensor will be powered on and output the signal of the probe-type temperature sensor to the external control terminal through the signal line.

[0039] The ground source heat pump U-shaped head with underground temperature detection function described in this embodiment of the invention combines a temperature sensor with an existing U-shaped head. The temperature sensor is installed inside the base of the U-shaped head. During well drilling and pipe laying, the U-shaped head and temperature sensor are sent underground together, avoiding damage to the temperature sensor during pipe jacking. After the U-shaped head is installed, the temperature sensor inside the U-shaped head is emitted by ground power, allowing the temperature sensor probe to insert into the soil, thereby achieving accurate measurement of underground temperature. This provides data support for balancing underground heating and cooling loads, which is beneficial for ensuring the effectiveness of the ground source heat pump and the long-term effective utilization of underground energy.

[0040] The above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions also fall within the scope of the present invention, and the patent protection scope of the present invention should be defined by the claims.

Claims

1. A U-shaped connector for a ground source heat pump with underground temperature detection function, the connector comprising a conical hollow base (1) and a U-shaped pipe joint (2) placed inside the hollow base (1), characterized in that: An elastic launching device (4) and a probe-type temperature sensor (5) are provided inside a conical hollow base (1). A control line protection tube connector (3) is provided on the upper end face of the conical hollow base (1). The probe-type temperature sensor (5) is installed at the position corresponding to the control line protection tube connector (3) through the elastic launching device (4). The probe end of the probe-type temperature sensor (5) is vertically downward, and a hard tip (501) is provided at the end of the probe (500) of the probe-type temperature sensor (5). A force-bearing protective cover (6) is provided on the part of the hollow base (1) shell facing the hard tip (501) of the probe (500). The force-bearing protective cover (6) is separated from the hollow base (1) shell under the action of external force, and a hole matching the probe-type temperature sensor (5) is formed on the hollow base (1). The elastic launching device (4) includes an upper force plate (400), a lower force plate (401), and a launching spring (402). The upper force plate (400) is fixed to one end of the control line protection tube connector (3) near the hollow base (1). The upper force plate (400) and the lower force plate (401) are connected by a fusible pull wire (403). The launching spring (402) is compressed and placed between the upper force plate (400) and the lower force plate (401), with its upper and lower ends respectively connected to the upper force plate (400) and the lower force plate (401). 401) Connection, the two ends of the fuse pull wire (403) are respectively provided with energized wires (404), and the two energized wires (404) are led out through the control line protection tube connector (3); the probe-type temperature sensor (5) is installed on the lower force plate (401), and its signal line is led out through the control line protection tube connector (3). When the fuse pull wire (403) is energized and disconnected, the launching spring (402) springs open and drives the probe-type temperature sensor (5) to push the force protection cover (6) vertically downward and extend out of the hollow base (1).

2. The ground source heat pump U-shaped connector with underground temperature detection function according to claim 1, characterized in that: Insulating heads (405) are provided at both ends of the fuse pull wire (403). The insulating heads (405) at both ends of the fuse pull wire (403) are fixed at the center positions of the upper force plate (400) and the lower force plate (401), respectively. The fuse pull wire (403) is straightened after being fixed. Two current-carrying wires (404) pass through the insulating heads (405) and are connected to the fuse pull wire (403).

3. A ground source heat pump U-shaped connector with underground temperature detection function according to claim 1 or 2, characterized in that: The edge of the stress-bearing protective cover (6) is connected to the outer shell of the hollow base (1) by a point break line; or one side of the stress-bearing protective cover (6) is hinged to the outer shell of the hollow base (1), and the other side is snapped to the outer shell of the hollow base (1); or multiple break lines are provided on the stress-bearing protective cover (6) that are easy to fall off when subjected to force from the inside out, and the stress-bearing protective cover (6) is provided with an outward protrusion angle along the break lines.

4. A ground source heat pump U-shaped connector with underground temperature detection function according to claim 1 or 2, characterized in that: The U-shaped pipe joint (2) is provided with one or two, and a buried pipe joint (100) matching and connected to the pipe opening of the U-shaped pipe joint (2) is provided on the upper end face of the hollow base (1). Both pipe openings of each U-shaped pipe joint (2) are provided with buried pipe joints (100); the control line protection pipe joint (3) is staggered from the buried pipe joint (100), and a top pipe groove (101) is provided at the center of the upper end face of the hollow base (1).

5. A ground source heat pump U-shaped connector with underground temperature detection function according to claim 1 or 2, characterized in that: The probe-type temperature sensor (5) is provided with two signal lines (502) and a power supply line (503). The power supply line (503) is connected to the energized conductor at the upper end of the fuse pull wire (403), and the power supply line (503) is connected in parallel with the fuse pull wire (403). Before the fuse pull wire (403) melts, it short-circuits the probe-type temperature sensor (5) in parallel.

6. A ground source heat pump U-shaped connector with underground temperature detection function according to claim 1 or 2, characterized in that: The hollow base (1) is a plastic base, and the hard tip (501) is a conical metal tip. The area of ​​the force protection cover (6) is larger than the cross-section of the probe (500) of the probe-type temperature sensor (5) and smaller than the cross-section of the body of the probe-type temperature sensor (5). A force groove (600) is provided on the force protection cover (6) directly opposite the conical tip. After the force protection cover (6) falls off or breaks, the probe (500) of the probe-type temperature sensor (5) extends out of the hollow base (1).

7. A ground source heat pump U-shaped connector with underground temperature detection function according to claim 1 or 2, characterized in that: The hard tip (501) and the sensor probe (500) are either an integral structure or separate structures. When the hard tip (501) and the probe (500) are separate structures, the hard tip (501) and the probe (500) are fixedly bonded together.

8. A ground source heat pump U-shaped connector with underground temperature detection function according to claim 1 or 2, characterized in that: The fuse pull wire (403) is made of solder wire or low current fuse, with or without nylon wire wrapped around it. When energized, the fuse pull wire (403) heats up and melts completely.

9. A method for installing a U-shaped connector for a ground source heat pump with underground temperature detection function as described in any one of claims 1 to 8, wherein the U-shaped connector for a ground source heat pump with underground temperature detection function is used for end connection of a vertical buried pipe of a ground source heat pump, characterized in that... The specific steps are as follows: S1 will insert the assembled U-shaped connector of the ground source heat pump with underground temperature detection function into the buried hole during well drilling and pipe laying. S2 connects the ground source heat pump vertical buried pipe to the buried pipe joint of the U-shaped connector, installs the control line protection pipe at the control line protection pipe joint, and leads the two energized wires and the signal line of the probe-type temperature sensor out to the ground through the control line protection pipe; S3 connects the two energized wires leading out of the ground to the power source, ensuring that the current carrying capacity is greater than the maximum current of the fuse pull wire, causing the fuse pull wire to break. This activates the launch spring of the elastic launch device, which then launches the probe of the probe-type temperature sensor inside the base through the hollow base and inserts it into the soil, thereby achieving accurate measurement of the underground soil temperature.

10. The installation method of a ground source heat pump U-shaped connector with underground temperature detection function according to claim 9, characterized in that: In step S3, the resistance at both ends of the wire is measured to detect whether the elastic emission device is firing; and when the fuse is broken, the probe temperature sensor will be powered on and the signal of the probe temperature sensor will be output to the external control terminal through the signal line.

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