Ground source heat pump unit utilizing terrestrial heat

Abstract

The invention relates to a ground source heat pump unit utilizing terrestrial heat applied to the technical field related to heat pump units, through the arrangement of a connector protection unit, on one hand, the connector of a heat exchange coil pipe can be protected and cannot make direct contact with soil, and the possibility of leakage at the connector is reduced; the water seepage monitoring unit and the fixed-point monitoring unit which are arranged in the joint protection unit in a matched mode can obviously distinguish whether the heat exchange coil pipe seeps water from the upper portion or the lower portion, and according to the water seepage condition of the lower pipe connecting position, leaked water can be concentrated to fall to a monitoring ring firstly, so that a pressure sensor in the monitoring ring is triggered; compared with large-area excavation and maintenance in the prior art, the fixed-point excavation and maintenance method has the advantages that the maintenance difficulty is greatly reduced, the maintenance efficiency is improved, and the maintenance cost investment is reduced.

Description

Technical Field

[0001] The present invention relates to a soil source heat pump unit, and in particular to a soil source heat pump unit utilizing geothermal energy and applied in the technical field related to heat pump units. Background Art

[0002] The ground source heat pump system is a heat pump technology that has gradually emerged with the emergence of global energy crises and environmental problems. It is a heat pump air conditioning system that transfers shallow ground energy to high-level energy by inputting a small amount of high-level energy. From an energy perspective, it utilizes the heat in the soil (groundwater) at room temperature, which is an inexhaustible renewable energy source. It provides a free and efficient energy storage source for the air conditioning system.

[0003] In the pure water circulation geothermal and auxiliary heat pump air conditioning system disclosed in Chinese patent CN102213469B and the combined deep geothermal heat pump system disclosed in Chinese patent CN105716328A, the disc heat exchanger used for heat exchange with the underground is generally buried underground. Due to the humid environment underground, leakage is prone to occur at the interface after long-term use, affecting the heat exchange efficiency. The buried depth of the disc heat exchanger is even as deep as 30 to 100 meters, and it is difficult to confirm the leakage point. Large-scale excavation is often required for maintenance, especially at the interface below the heat exchange coil, which is deeper underground. The difficulty of excavation and maintenance will be significantly greater than that above, resulting in great difficulty in maintenance, low efficiency, and high maintenance cost. Summary of the invention

[0004] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that when a leakage point occurs, it is difficult to locate the point, resulting in the need for large-scale excavation and repair, which makes the repair difficult, inefficient, and has high maintenance costs.

[0005] In order to solve the above problems, the present invention provides a soil source heat pump unit utilizing geothermal energy, comprising a heat pump with a monitoring center and a heat exchange coil buried underground, the heat pump comprising an evaporator, a compressor connected to the evaporator, a condenser and a four-way valve, the liquid inlets of the evaporator and the compressor are connected to the four-way valve through a main pipeline, the four-way valve and the heat exchange coil, the evaporator discharge port and the heat exchange coil, and the condenser discharge port and the heat exchange coil are connected through secondary pipelines, and electromagnetic valves are installed on the secondary pipelines connected to the discharge ports of the evaporator and the condenser, and the exhaust port of the evaporator is connected to the compressor through a branch pipeline; The heat exchange coil includes multiple vertical pipes, multiple upper bend sections respectively fixedly connected between the upper ends of two adjacent vertical pipes, and multiple lower bend sections respectively fixedly connected between the lower ends of two adjacent vertical pipes. The multiple lower bend sections and the upper bend sections are staggered with each other. The outer cover of the heat exchange coil is provided with a joint protection unit. The joint protection unit includes an upper liquid guide cover whose fixed cover is arranged outside the multiple upper bend sections, a lower liquid receiving cover whose fixed cover is arranged outside the multiple lower bend sections, and a liquid guide pipe fixedly connected between the upper liquid guide cover and the lower liquid receiving cover. A water seepage monitoring unit is installed inside the lower liquid receiving cover, and a fixed-point monitoring unit is also arranged at the lower bend section. The fixed-point monitoring unit and the water seepage monitoring unit are both connected to the signal of the monitoring center.

[0006] In the above-mentioned soil source heat pump unit utilizing geothermal energy, by setting up a fixed-point monitoring unit and a water seepage monitoring unit, it can be clearly distinguished whether the heat exchange coil is leaking from the top or the bottom, and in the case of leakage from the bottom, the leakage point can also be located, so that fixed-point excavation and maintenance can be carried out. Compared with the large-area excavation and maintenance of the prior art, the difficulty of maintenance is greatly reduced, while the maintenance efficiency is improved and the investment in maintenance costs is reduced.

[0007] As a further improvement of the present application, the lower end of the upper liquid guiding cover is a conical structure, and the lowest point of the upper liquid guiding cover is offset from the lower bend section. The liquid guiding tube is wrapped with an outer protective layer, and the upper and lower ends of the outer protective layer are fixedly connected to the upper liquid guiding cover and the lower liquid receiving cover respectively.

[0008] As a further improvement of the present application, the water seepage monitoring unit includes a laser transmitter and a laser receiver respectively installed on the left and right inner walls of the lower liquid receiving cover and a sensing block installed at the bottom of the lower liquid receiving cover, and the sensing block is located directly below the liquid guiding tube.

[0009] As a further improvement of the present application, the sensing block includes a lining plate fixedly connected to the bottom of the lower liquid receiving cover and a liquid absorbing layer fixedly connected to the upper end of the lining plate, and the laser beam emitted by the laser transmitter intersects with the liquid absorbing layer.

[0010] As a further improvement of the present application, the sides of the upper liquid guiding hood and the lower liquid receiving hood are provided with a plurality of sealing doors corresponding to the bending parts of the heat exchange coil, and the upper liquid guiding hood and the lower liquid receiving hood are both hard and transparent structures.

[0011] As a further improvement and supplement to the present application, the fixed-point monitoring unit includes a horizontal support rod fixedly connected to two adjacent vertical pipes, a vertical support rod fixedly connected to the lower end of the horizontal support rod, and a monitoring ring mounted on the middle part of the lower bend section, and the monitoring ring is fixedly connected to the vertical support rod.

[0012] As a further improvement and supplement to the present application, the monitoring ring includes an outer ring cover, an inner magnetic ring located inside the outer ring cover, and a pressure sensor installed at the inner bottom end of the outer ring cover. The left and right outer edges of the inner magnetic ring are in contact with the inner wall of the outer ring cover. The pressure sensor is connected to the monitoring center signal. The outer ring cover includes a fixed magnetic half ring fixedly connected to the vertical support rod and a liquid collecting half ring fixedly connected to the lower end of the fixed magnetic half ring. A drainage hole is opened at the outer end of the liquid collecting half ring, and the lower edge of the drainage hole is flush with the bottom edge of the outer ring cover.

[0013] As a further improvement and supplement to the present application, the inner magnetic ring and the outer ring cover are arranged non-coaxially, the left and right inner walls of the top of the fixed magnetic half ring are fixedly inlaid with magnetic strips, and the left and right outer ends of the inner magnetic ring are respectively adsorbed to the two magnetic strips.

[0014] As a further improvement and supplement to the present application, the thickness of the outer ring of the liquid gathering half ring is greater than the thickness of the fixed magnetic half ring, the edge of the inner ring of the liquid gathering half ring is an outward-expanding U-shaped structure, and the middle part of the U-shape is straight, and when the inner magnetic ring is adsorbed to the magnetic strip, the lower end of the inner magnetic ring is located inside the liquid gathering half ring, and the upper surface of the inner magnetic ring and the left and right inner walls of the liquid gathering half ring form a receiving groove.

[0015] As another improvement of the present application, the liquid-absorbing layer includes a transparent protective cover and a water-sensitive interlayer fixedly embedded in the transparent protective cover, a double U-shaped hole is opened at the upper end of the transparent protective cover, the positive U-shaped part of the double U-shaped hole is filled with liquid-absorbing cotton, the upper port of the double U-shaped hole is coaxial with the liquid guide tube, the edge of the lower port of the double U-shaped hole is in contact with the water-sensitive interlayer, the water-sensitive interlayer is water-absorbing color-changing ink, and the laser beam of the laser transmitter intersects with the water-sensitive interlayer.

[0016] In summary, by setting up the joint protection unit, on the one hand, the joints of the heat exchange coil can be protected so that they will not directly contact the soil, reducing the possibility of leakage at the interface; on the other hand, in conjunction with the water seepage monitoring unit and the fixed-point monitoring unit set in the joint protection unit, it can clearly distinguish whether the heat exchange coil is leaking from the top or the bottom, and in the case of water seepage at the lower pipe connection, the leaked water will be concentrated and fall on the monitoring ring first, so that the pressure sensor inside is triggered, and then the leakage point is located, so that fixed-point excavation and maintenance can be carried out. Compared with the large-area excavation and maintenance of the existing technology, the difficulty of maintenance is greatly reduced, while the maintenance efficiency is improved and the investment in maintenance costs is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the distribution of a heat pump unit in the first embodiment of the present application; Figure 2 This is a schematic diagram of the principle of the first implementation mode of the present application; Figure 3 This is a front view of a heat exchange coil with a joint protection unit according to a first embodiment of the present application; Figure 4This is a front schematic diagram of a joint protection unit according to a first embodiment of the present application; Figure 5 This is a three-dimensional schematic diagram of a fixed-point monitoring unit according to a first embodiment of the present application; Figure 6 A three-dimensional diagram of a monitoring ring according to a first embodiment of the present application; Figure 7 This is a front view of the monitoring ring when there is no leakage in the heat exchange coil according to the first embodiment of the present application; Figure 8 This is a front view of the monitoring ring after leakage occurs in the heat exchange coil of the first embodiment of the present application; Fig. 9 A side cross-sectional view of a monitoring ring according to a first embodiment of the present application; Fig.10 This is a side cross-sectional view of the monitoring ring after leakage occurs in the heat exchange coil in the first embodiment of the present application; Fig.11 This is a cross-sectional view of a sensing block according to a second embodiment of the present application.

[0018] Description of the numbers in the figure: 1 heat exchange coil, 101 lower bend section, 102 upper bend section, 2 heat pump, 21 evaporator, 22 compressor, 23 condenser, 24 four-way valve, 31 upper liquid guide cover, 32 liquid guide pipe, 33 lower liquid cover, 301 outer protective layer, 41 horizontal support rod, 42 vertical support rod, 5 monitoring ring, 51 outer ring cover, 52 inner magnetic ring, 53 pressure sensor, 511 liquid collecting half ring, 512 fixed magnetic half ring, 501 drainage hole, 502 magnetic strip, 601 laser transmitter, 602 laser receiver, 71 lining plate, 72 liquid absorption layer, 721 transparent protective cover, 722 water-sensitive interlayer, 701 double U-shaped hole, 702 liquid absorption cotton. DETAILED DESCRIPTION

[0019] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0020] The first implementation method: Figure 1-2A soil source heat pump unit utilizing geothermal energy is shown, comprising a heat pump 2 with a monitoring center and a heat exchange coil 1 buried underground, wherein the heat pump 2 is connected to a terminal device, and the heat pump 2 comprises an evaporator 21, a compressor 22 connected to the evaporator 21, a condenser 23 and a four-way valve 24, the liquid inlets of the evaporator 21 and the compressor 22 are connected to the four-way valve 24 through a main pipeline, the four-way valve 24 and the heat exchange coil 1, the liquid discharge port of the evaporator 21 and the heat exchange coil 1, and the liquid discharge port of the condenser 23 and the heat exchange coil 1 are connected through secondary pipelines, and electromagnetic valves are installed on the secondary pipelines connected to the liquid discharge ports of the evaporator 21 and the condenser 23, and the exhaust port of the evaporator 21 and the compressor 22 are connected through a branch pipeline; In this embodiment, taking the use of the heat pump unit as an air conditioner as an example, the terminal device is an air pump that can exchange air with the indoor room according to actual needs. The indoor air can be sucked into the heat pump 2 and exchange heat with the water in the heat exchange coil 1, and cold air or hot air can be discharged to achieve cooling or heating.

[0021] The heat pump unit can also be used as a water heater. In this case, the terminal equipment can be a water pump and a water tank for storing water. The water pump draws water into the heat pump 2 and exchanges heat with the water in the heat exchange coil 1, and discharges cold water or hot water to achieve cooling or heating.

[0022] It is worth noting that, during specific implementation, the specific selection of the terminal device can be set by those skilled in the art according to actual needs.

[0023] like Figure 2 In the cooling mode of this embodiment: the heat exchange coil 1 is connected to the condenser 23 through the four-way valve 24. At this time, the water in the pipe of the heat exchange coil 1 absorbs the coldness of the ground to form geothermal cold water, and enters the condenser 23 along the four-way valve 24. At this time, the condenser 23 can absorb the hot air in the room through the air pump, and the hot air and the geothermal cold water perform heat exchange, so that the temperature of the hot air is reduced and becomes cold air to be discharged into the room, so as to realize the cooling by using geothermal resources; In the heating mode of this embodiment: the heat exchange coil 1 is connected to the evaporator 21 through the four-way valve 24. At this time, the water in the pipe of the heat exchange coil 1 absorbs the heat from the ground to form geothermal hot water, and flows into the evaporator 21. At this time, the evaporator 21 can absorb the cold air in the room through the air pump, and exchange heat with the geothermal hot water to increase the air temperature, and then continue to discharge it into the compressor 22, compress it to form high-temperature gas and discharge it into the room to achieve heating.

[0024] It is worth noting that the compressor 22 in the heating mode is used as an auxiliary to further increase the temperature of the air that has absorbed the heat in the geothermal hot water, thereby making the heating faster and more effective. During specific implementation, the compressor 22 can be selectively set according to actual needs.

[0025] like Figure 3 The heat exchange coil 1 includes a plurality of vertical pipes, a plurality of upper curved sections 102 respectively fixedly connected between the upper ends of two adjacent vertical pipes, and a plurality of lower curved sections 101 respectively fixedly connected between the lower ends of two adjacent vertical pipes. The plurality of lower curved sections 101 and the upper curved sections 102 are staggered with each other. The outer cover of the heat exchange coil 1 is provided with a joint protection unit. The joint protection unit includes an upper liquid guide cover 31 fixedly provided outside the plurality of upper curved sections 102, a lower liquid receiving cover 33 fixedly provided outside the plurality of lower curved sections 101, and a liquid guide pipe 32 fixedly connected between the upper liquid guide cover 31 and the lower liquid receiving cover 33. A water seepage monitoring unit is installed inside the lower liquid receiving cover 33. A fixed-point monitoring unit is also provided at the lower curved section 101. Both the fixed-point monitoring unit and the water seepage monitoring unit are connected to the monitoring center signal.

[0026] like Figure 4 The lower end of the upper liquid guiding cover 31 is a conical structure, and the lowest point of the upper liquid guiding cover 31 is offset from the lower curved section 101. The liquid guiding tube 32 is wrapped with an outer protective layer 301. The upper and lower ends of the outer protective layer 301 are respectively fixedly connected to the upper liquid guiding cover 31 and the lower liquid receiving cover 33. The water seepage monitoring unit includes a laser transmitter 601 and a laser receiver 602 respectively installed on the left and right inner walls of the lower liquid receiving cover 33, and a sensing block installed at the bottom of the lower liquid receiving cover 33. The sensing block is located directly below the liquid guiding tube 32. The sensing block includes a lining plate 71 fixedly connected to the bottom of the lower liquid receiving cover 33 and a liquid absorbing layer 72 fixedly connected to the upper end of the lining plate 71. The surface of the liquid absorbing layer 72 is coated with water-discoloring ink. The laser beam emitted by the laser transmitter 601 intersects with the liquid absorbing layer 72.

[0027] When water seeps from above, the water will fall down along the conical surface and the liquid guide tube 32 and directly fall on the liquid absorption layer 72, making it gradually transparent. At this time, the laser beam emitted by the laser transmitter 601 can pass through the liquid absorption layer 72, so that the laser receiver 602 can receive the laser signal.

[0028] In addition, the outer surface of the end portion where the vertical pipe is connected to the upper curved section 102 is coated with water-discoloring ink, so that the corresponding position can change color after water seeps from the upper side, which is convenient for reminding the staff. The upper liquid guiding cover 31 and the lower liquid receiving cover 33 are provided with multiple sealing doors corresponding to the bending parts of the heat exchange coil 1 respectively on the side. The upper liquid guiding cover 31 and the lower liquid receiving cover 33 are both hard transparent structures. When it is determined that leakage occurs above, excavation can be carried out at the corresponding position of the sealing door in the middle of the upper liquid guiding cover 31, and then the sealing door can be opened, and a micro camera can be sent into the upper liquid guiding cover 31 through the sealing door to obtain internal image information. According to the discolored position of the pipeline in the obtained image information, the leakage position is determined, and then excavation continues to be carried out towards the leakage position, and then the corresponding sealing door is opened for maintenance.

[0029] like Figure 5-6The fixed-point monitoring unit includes a horizontal support rod 41 fixedly connected to two adjacent vertical pipes, a vertical support rod 42 fixedly connected to the lower end of the horizontal support rod 41, and a monitoring ring 5 sleeved on the middle part of the lower bend section 101. The monitoring ring 5 is fixedly connected to the vertical support rod 42. The monitoring ring 5 includes an outer ring cover 51, an inner magnetic ring 52 located inside the outer ring cover 51, and a pressure sensor 53 installed at the inner bottom end of the outer ring cover 51. The left and right outer edges of the inner magnetic ring 52 are in contact with the inner wall of the outer ring cover 51. The pressure sensor 53 is connected to the monitoring center signal. The outer ring cover 51 includes a fixed magnetic half ring 512 fixedly connected to the vertical support rod 42 and a liquid collecting half ring 511 fixedly connected to the lower end of the fixed magnetic half ring 512. A drainage hole 501 is drilled at the outer end of the liquid collecting half ring 511. The lower edge of the mouth of the drainage hole 501 is flush with the bottom edge of the outer ring cover 51. Figure 7 and Fig. 9 The inner magnetic ring 52 is not coaxially arranged with the outer ring cover 51 , and the left and right inner walls of the top of the fixed magnetic half ring 512 are fixedly inlaid with magnetic strips 502 , and the left and right outer ends of the inner magnetic ring 52 are respectively adsorbed to the two magnetic strips 502 .

[0030] like Figure 8 When leakage occurs at the lower pipe interface, the seeping water moves along the lower curved section 101 to the middle of its lower end and then flows downward and falls into the receiving groove. As the amount of seepage increases, the downward force on the inner magnetic ring 52 increases. When it is greater than the adsorption force between the inner magnetic ring 52 and the magnetic strip 502, it will fall and squeeze the pressure sensor 53, causing the pressure sensor 53 to generate force data first, such as Fig.10 Then, part of the seeped water may overflow along the edge of the receiving groove, and part of it may overflow along the drainage hole 501 and fall on the lower liquid receiving cover 33. As more and more water seeps out, the liquid level will gradually move up to the liquid absorption layer 72, thereby causing the transparency there to change, so that the laser receiver 602 will receive the optical signal data. Based on the changes in the data on the pressure sensor 53 and the laser receiver 602, the monitoring center can determine that a leak occurs at the pipe interface below, and can locate the leak according to the data changes of the pressure sensor 53, and directly excavate, thereby effectively reducing the excavation area and amplitude, reducing the difficulty and cost of maintenance, and improving maintenance efficiency.

[0031] The thickness of the outer ring of the liquid collecting half ring 511 is greater than that of the fixed magnetic half ring 512. The edge of the inner ring of the liquid collecting half ring 511 is an outward-expanding U-shaped structure, and the middle part of the U-shape is straight, so that the volume of the subsequent receiving groove is relatively large and can receive more water, so that the inner magnetic ring 52 can be sufficiently separated from the magnetic strip 502. When the inner magnetic ring 52 is adsorbed with the magnetic strip 502, the lower end of the inner magnetic ring 52 is located inside the liquid collecting half ring 511, and the upper surface of the inner magnetic ring 52 and the left and right inner walls of the liquid collecting half ring 511 form a receiving groove for receiving water seeping out from the connection between the corresponding lower bend section 101 and the vertical pipe, thereby increasing the force on the inner magnetic ring 52 so that it can be separated from the adsorption of the magnetic strip 502 and trigger the pressure sensor 53.

[0032] In summary, by setting the joint protection unit, on the one hand, the joints of the heat exchange coil 1 can be protected so that they will not directly contact the soil, reducing the possibility of leakage at the interface. On the other hand, in conjunction with the water seepage monitoring unit and the fixed-point monitoring unit set in the joint protection unit, it can clearly distinguish whether the heat exchange coil 1 is seeping from the top or the bottom, and in the case of water seepage at the lower pipe connection, the leaked water will be concentrated and fall on the monitoring ring 5 first, so that the pressure sensor 53 inside is triggered, and then the leakage point is located, so that fixed-point excavation and maintenance can be carried out. Compared with the large-area excavation and maintenance of the prior art, the difficulty of maintenance is greatly reduced, while the maintenance efficiency is improved and the investment in maintenance costs is reduced.

[0033] The second implementation method: Based on the first embodiment, this embodiment further improves the liquid absorption layer 72, and the rest of the parts remain the same as the first embodiment.

[0034] Fig.11 As shown, the liquid-absorbing layer 72 includes a transparent protective cover 721 and a water-sensitive interlayer 722 fixedly embedded in the transparent protective cover 721. A double U-shaped hole 701 is bored at the upper end of the transparent protective cover 721. The positive U-shaped part of the double U-shaped hole 701 is filled with liquid-absorbing cotton 702. The upper end of the double U-shaped hole 701 is coaxial with the liquid guide tube 32, and the edge of the lower end of the double U-shaped hole 701 is in contact with the water-sensitive interlayer 722. The water-sensitive interlayer 722 is a water-absorbing color-changing ink, and the laser beam of the laser transmitter 601 intersects with the water-sensitive interlayer 722. Through the coordinated arrangement of the double U-shaped hole 701 and the liquid-absorbing cotton 702, the water-sensitive interlayer 722 can be prevented from directly contacting the air in the lower liquid-receiving cover 33, so that its color is not easily changed due to air humidity, and then the water-sensitive interlayer 722 is protected without affecting the passage of water in the double U-shaped hole 701, so that the result of water seepage monitoring in this embodiment is more accurate.

[0035] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A soil source heat pump unit utilizing geothermal energy, characterized in that: The heat pump (2) comprises a heat pump having a monitoring center and a heat exchange coil (1) buried underground. The heat pump (2) comprises an evaporator (21), a compressor (22) connected to the evaporator (21), a condenser (23) and a four-way valve (24). The liquid inlets of the evaporator (21) and the compressor (22) are connected to the four-way valve (24) via a main pipeline. The four-way valve (24) and the heat exchange coil (1), the liquid discharge port of the evaporator (21) and the heat exchange coil (1), and the liquid discharge port of the condenser (23) and the heat exchange coil (1) are connected via secondary pipelines. Solenoid valves are installed on the secondary pipelines connected to the liquid discharge ports of the evaporator (21) and the condenser (23). The exhaust port of the evaporator (21) and the compressor (22) are connected via a branch pipeline. The heat exchange coil (1) comprises a plurality of vertical pipes, a plurality of upper curved sections (102) respectively fixedly connected between the upper ends of two adjacent vertical pipes, and a plurality of lower curved sections (101) respectively fixedly connected between the lower ends of two adjacent vertical pipes. The plurality of lower curved sections (101) and the upper curved sections (102) are mutually offset. The outer cover of the heat exchange coil (1) is provided with a joint protection unit. The joint protection unit comprises an upper liquid guide cover (31) whose cover is fixedly arranged outside the plurality of upper curved sections (102), a lower liquid receiving cover (33) whose cover is fixedly arranged outside the plurality of lower curved sections (101), and a liquid guide pipe (32) fixedly connected between the upper liquid guide cover (31) and the lower liquid receiving cover (33). A water seepage monitoring unit is installed inside the lower liquid receiving cover (33). A fixed-point monitoring unit is also provided at the lower curved section (101). Both the fixed-point monitoring unit and the water seepage monitoring unit are connected to a monitoring center signal.

2. A ground source heat pump unit utilizing geothermal energy according to claim 1, characterized in that: The lower end of the upper liquid guiding cover (31) is a conical structure, and the lowest point of the upper liquid guiding cover (31) and the lower curved section (101) are offset from each other. The liquid guiding tube (32) is wrapped with an outer protective layer (301), and the upper and lower ends of the outer protective layer (301) are fixedly connected to the upper liquid guiding cover (31) and the lower liquid receiving cover (33) respectively.

3. The ground source heat pump unit utilizing geothermal energy according to claim 1, characterized in that: The water seepage monitoring unit comprises a laser transmitter (601) and a laser receiver (602) respectively mounted on the left and right inner walls of the lower liquid receiving cover (33), and a sensing block mounted on the bottom of the lower liquid receiving cover (33), wherein the sensing block is located directly below the liquid guiding tube (32).

4. A ground source heat pump unit utilizing geothermal energy according to claim 3, characterized in that: The sensing block comprises a lining plate (71) fixedly connected to the bottom of the lower liquid receiving cover (33) and a liquid absorbing layer (72) fixedly connected to the upper end of the lining plate (71), and the laser beam emitted by the laser emitter (601) intersects with the liquid absorbing layer (72).

5. The ground source heat pump unit utilizing geothermal energy according to claim 1, characterized in that: The upper liquid-conducting cover (31) and the lower liquid-receiving cover (33) are both provided with a plurality of sealing doors corresponding to the bending parts of the heat exchange coil (1), and the upper liquid-conducting cover (31) and the lower liquid-receiving cover (33) are both hard and transparent structures.

6. The ground source heat pump unit utilizing geothermal energy according to claim 1, characterized in that: The fixed-point monitoring unit comprises a horizontal support rod (41) fixedly connected to two adjacent vertical pipes, a vertical support rod (42) fixedly connected to the lower end of the horizontal support rod (41), and a monitoring ring (5) sleeved on the middle part of the lower bend section (101), wherein the monitoring ring (5) is fixedly connected to the vertical support rod (42).

7. A ground source heat pump unit utilizing geothermal energy according to claim 6, characterized in that: The monitoring ring (5) comprises an outer ring cover (51), an inner magnetic ring (52) located inside the outer ring cover (51), and a pressure sensor (53) installed at the inner bottom end of the outer ring cover (51), the left and right outer edges of the inner magnetic ring (52) are in contact with the inner wall of the outer ring cover (51), the pressure sensor (53) is connected to the monitoring center signal, the outer ring cover (51) comprises a fixed magnetic half ring (512) fixedly connected to the vertical support rod (42) and a liquid collecting half ring (511) fixedly connected to the lower end of the fixed magnetic half ring (512), the outer end of the liquid collecting half ring (511) is drilled with a drainage hole (501), and the lower edge of the drainage hole (501) is flush with the bottom edge of the outer ring cover (51).

8. The ground source heat pump unit utilizing geothermal energy according to claim 7, characterized in that: The inner magnetic ring (52) is arranged non-coaxially with the outer ring cover (51), the left and right inner walls of the top of the fixed magnetic half ring (512) are fixedly inlaid with magnetic strips (502), and the left and right outer ends of the inner magnetic ring (52) are respectively attracted to the two magnetic strips (502).

9. The ground source heat pump unit utilizing geothermal energy according to claim 7, characterized in that: The thickness of the outer ring of the liquid collecting half ring (511) is greater than the thickness of the fixed magnet half ring (512); the edge of the inner ring of the liquid collecting half ring (511) is an outwardly expanded U-shaped structure, and the middle part of the U-shape is straight; when the inner magnetic ring (52) and the magnetic strip (502) are adsorbed, the lower end of the inner magnetic ring (52) is located inside the liquid collecting half ring (511), and the upper surface of the inner magnetic ring (52) and the left and right inner walls of the liquid collecting half ring (511) form a receiving groove.

10. The ground source heat pump unit utilizing geothermal energy according to claim 4, characterized in that: The liquid absorbing layer (72) comprises a transparent protective cover (721) and a water-sensitive interlayer (722) fixedly embedded in the transparent protective cover (721); a double U-shaped hole (701) is bored at the upper end of the transparent protective cover (721); the positive U-shaped portion of the double U-shaped hole (701) is filled with liquid absorbing cotton (702); the upper end of the double U-shaped hole (701) is coaxial with the liquid guiding tube (32); the edge of the lower end of the double U-shaped hole (701) is in contact with the water-sensitive interlayer (722); the water-sensitive interlayer (722) is water-absorbing color-changing ink, and the laser beam of the laser transmitter (601) intersects with the water-sensitive interlayer (722).

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