Geothermal well heat exchange strengthening auxiliary device

Abstract

The utility model discloses a kind of geothermal well reinforced heat exchange auxiliary devices, it is related to geothermal well heat exchange technical field, specifically a kind of geothermal well reinforced heat exchange auxiliary devices, including geothermal well, the top of the geothermal well is equipped with water pump for pumping, the inside of the geothermal well is equipped with first empty slot, first temperature transmitter for converting geothermal is installed in the first empty slot, heat exchange device for absorbing geothermal is installed in the center position of the first temperature transmitter, contact by first temperature transmitter and ground heat reservoir rock layer, contact by spiral heat exchange tube and first temperature transmitter, heat exchange water is constantly heated, heat exchange time is longer, heat exchange temperature is higher, and scale cleaning assembly in spiral heat exchange tube rolls along with heat exchange water in spiral heat exchange tube, prevent scale blockage from affecting use. After water pump is closed, rebound component makes heat preservation component rebound, outlet is blocked, prevent temperature loss, and use to improve heat exchange efficiency.

Description

Technical Field

[0001] This utility model relates to the field of geothermal well heat exchange technology, specifically to an auxiliary device for enhancing heat exchange in geothermal wells. Background Technology

[0002] Geothermal heating systems can be categorized into direct heating and indirect heating based on how the geothermal flow enters the system. Direct heating involves directly introducing geothermal water into the heating system, while indirect heating involves the geothermal flow transferring heat to the circulating water of the heating system via a heat exchanger, without the geothermal flow directly entering the system. Currently, the traditional method of directly extracting and using geothermal water is gradually being phased out, replaced by "heat extraction without water extraction" technology. "Heat extraction without water extraction" refers to extracting and using the heat energy from the geothermal source without actually extracting the geothermal water itself. This achieves heat source acquisition for the heating system while avoiding problems such as groundwater level fluctuations caused by excessive geothermal water extraction, making it an environmentally friendly geothermal heating technology. Under current conditions, "heat extraction without water extraction" primarily utilizes single-well heat exchange, and the downhole heat exchange device of the geothermal source is a crucial component in this technology. Under normal circumstances, the heat exchange medium from the surface system flows through the pipeline inside the well and reaches the heat exchange device at the bottom of the well to exchange heat with the surrounding hot water layer and rise in temperature. Then, the high-temperature heat exchange medium flows back to the surface system, and plate heat exchangers and other devices are used to collect and utilize the heat in the heat exchange medium.

[0003] Most of the devices currently on the market use steel pipes with low thermal conductivity as the casing material that directly contacts the geothermal reservoir. The structure is simple, the heat transfer coefficient is low, which is not conducive to heat conduction, resulting in low geothermal recovery efficiency, low outlet fluid temperature of the produced well, low thermal energy utilization rate, and the scale formed by the long-term flow of fluid in the casing cannot be cleaned, which is easy to cause blockage. In addition, there are no corresponding insulation measures for the fluid after heat exchange, resulting in serious temperature loss. To address this, we propose a geothermal well enhanced heat exchange auxiliary device. Utility Model Content

[0004] This invention provides an auxiliary device for enhancing heat exchange in geothermal wells, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A geothermal well enhanced heat exchange auxiliary device includes a geothermal well, a water pump for pumping water is installed at the top of the geothermal well, a water pumping pipe is installed at the bottom of the water pump, a first cavity is opened inside the geothermal well, a first temperature transfer device for converting geothermal heat is installed in the first cavity, and a heat exchange device for absorbing geothermal heat is installed at the center of the first temperature transfer device.

[0007] The top of the geothermal well is equipped with a sealing cover for heat preservation, the top of the heat exchange device is equipped with a first heat preservation layer, the top of the first heat preservation layer is equipped with a square heat preservation device, the water pumping pipe passes through the square heat preservation device to reach the interior of the first empty slot, and the square heat preservation device is equipped with a heat preservation device for heat preservation.

[0008] The square heat insulator has a second cavity inside. The heat insulation device includes a heat insulation component and a rebound component. The heat insulation component is installed at the bottom of the second cavity and can open and close after the water pump is started. The rebound component is installed at the top of the second cavity and can push the heat insulation component in parallel to block the water pipe and maintain the water temperature after the water pump is turned off.

[0009] Preferably, the heat exchange device includes a spiral heat exchange tube and a second insulation layer.

[0010] The spiral heat exchange tube is spirally installed at the bottom of the first insulation layer. The outside of the spiral heat exchange tube is in contact with the outside of the first temperature sensor. The second insulation layer is installed at the bottom of the first insulation layer and at the center of the spiral heat exchange tube. The second insulation layer is sleeved on the outside of the pumping pipe.

[0011] Preferably, a heat-insulated water storage tank for storing water after heat exchange is installed at the bottom of the first empty tank, and a second temperature transmitter for heat preservation is sleeved on the outside of the heat-insulated water storage tank. The water pumping pipe extends through the second temperature transmitter and is connected to the heat-insulated water storage tank.

[0012] Preferably, the top of the spiral heat exchange tube passes through the first insulation layer and is equipped with a water inlet for injecting water, and the bottom of the spiral heat exchange tube passes through the second temperature transmitter to reach the insulated water storage tank and is equipped with a water outlet for outputting water. A scale cleaning component for cleaning the spiral heat exchange tube can be placed outside the water inlet, and an opening and closing component for removing the scale cleaning component is installed outside the square insulator.

[0013] Preferably, the insulation component includes a circular sealer, an opener / closer, and a threaded rod.

[0014] A threaded rod is installed on one side of the bottom of the second empty slot. An opening and closing device is rotatably connected to the outside of the threaded rod. A circular sealing device is installed on the side of the opening and closing device near the bottom of the square heat insulator through which the water pipe passes. The size of the circular sealing device is adapted to the size of the opening at the bottom of the square heat insulator through which the water pipe passes.

[0015] Preferably, the rebound assembly includes a connecting plate, a spring, and a spring plate.

[0016] A connecting plate is installed at the top of the second cavity. A spring is fixedly connected to the side of the connecting plate near the circular sealer. The other end of the spring is fixedly connected to one side of the spring plate. The spring plate can contact the circular sealer.

[0017] Preferably, the scale removal component includes a rolling cleaning ball and a cleaning sleeve;

[0018] The rolling cleaning ball is made of rubber and is fitted with a cleaning sleeve. The rolling cleaning ball can enter the spiral heat exchange tube from the water inlet and roll inside the spiral heat exchange tube with the water flow. The cleaning sleeve can contact the inner wall of the spiral heat exchange tube. The rolling cleaning ball can flow out from the water outlet into the heat preservation water storage tank with the water flow.

[0019] Preferably, the opening and closing assembly includes a sealing switch plate and a handle;

[0020] The square heat insulator is equipped with an openable and closable sealing switch plate on its exterior, and the sealing switch plate is equipped with a handle for opening the sealing switch plate.

[0021] This utility model has the following beneficial effects:

[0022] 1. This geothermal well enhanced heat exchange auxiliary device contacts the ground thermal storage rock layer through a first temperature transmitter, and then contacts the first temperature transmitter through a spiral heat exchange tube. The hot water continuously heats up as it spirals downward from the spiral heat exchange tube, increasing the flow time of the hot water, thus extending the heat exchange time and resulting in a higher heat exchange temperature. It is also less prone to loss. Furthermore, a scale removal component can be placed inside the spiral heat exchange tube and rolls inside the tube with the hot water to clean the scale inside the tube, preventing scale blockage from affecting its use.

[0023] 2. This geothermal well enhanced heat exchange auxiliary device uses a water pump to generate pressure, which creates centrifugal force to open the insulation component. The insulation component then contacts the rebound component, allowing the hot water to be extracted. When the water pump is turned off, the rebound component causes the insulation component to spring back, blocking the opening at the bottom of the square insulator through which the water pipe is drawn, thus preventing heat loss. Furthermore, a second sensor is installed on the outside of the insulated water storage tank used to store the water after heat exchange, which can further increase the temperature of the water after heat exchange and improve the heat exchange efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the top structure of the present invention;

[0026] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0027] Figure 4 This is an enlarged structural schematic diagram of point A of this utility model;

[0028] Figure 5 This is a schematic diagram of the internal structure of this utility model;

[0029] Figure 6 This is a schematic diagram of the internal cross-section of the present invention;

[0030] Figure 7 This is an enlarged structural schematic diagram of section B of this utility model.

[0031] In the diagram: 1. Geothermal well; 101. Insulation device; 102. Heat exchange device; 2. Sealing cover; 3. First insulation layer; 4. Square insulator; 5. Pumping pipe; 6. First temperature transmitter; 7. Inlet; 8. Water pump; 9. Spiral heat exchange tube; 10. First empty slot; 11. Outlet; 12. Insulated water storage tank; 13. Second temperature transmitter; 14. Second insulation layer; 15. Rolling cleaning ball; 16. Cleaning sleeve; 17. Sealing switch plate; 18. Handle; 19. Second empty slot; 20. Circular sealer; 21. Opening and closing device; 22. Threaded rod; 23. Connecting plate; 24. Spring; 25. Spring plate. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Please see Figures 1 to 7 An auxiliary device for enhancing heat exchange in a geothermal well includes a geothermal well 1, a water pump 8 for pumping water installed at the top of the geothermal well 1, and a water pumping pipe 5 installed at the bottom of the water pump 8. The geothermal well 1 has a first cavity 10 inside, and a first temperature transfer device 6 for converting geothermal energy is installed in the first cavity 10. A heat exchange device 102 for absorbing geothermal energy is installed at the center of the first temperature transfer device 6. The first temperature transfer device 6 is installed inside the geothermal well 1 and is in contact with the surface geothermal reservoir rock layer. The heat exchange device 102 is in contact with the first temperature transfer device 6, and the hot water inside the heat exchange device 102 can be heated. The heat exchange device 102 does not need to be in direct contact with the surface geothermal reservoir rock layer, which is beneficial for the heat transfer device 102 to conduct the temperature of the hot water.

[0034] The top of the geothermal well 1 is equipped with a sealing cover 2 for heat preservation. The top of the heat exchange device 102 is equipped with a first insulation layer 3. A square heat insulator 4 is installed on the top of the first insulation layer 3. The water pumping pipe 5 passes through the square heat insulator 4 and reaches the interior of the first empty slot 10. A heat preservation device 101 for heat preservation is installed inside the square heat insulator 4. The sealing cover 2 can prevent the heat of the hot water from being lost. The heat preservation device 101 inside the square heat insulator 4 can be opened and closed with the opening and closing of the water pump 8, which can effectively keep the hot water warm and prevent the hot water from losing heat when it comes into contact with cold air.

[0035] The square heat exchanger 4 has a second slot 19 inside. The heat exchange device 101 includes a heat exchange component and a rebound component. The heat exchange component is installed at the bottom of the second slot 19 and can open and close after the water pump 8 is started. The rebound component is installed at the top of the second slot 19 and can push the heat exchange component in parallel to block the water pump pipe 5 to maintain the water temperature after the water pump 8 is turned off. When the water pump 8 is turned on, the heat exchange component opens and contacts the rebound component, and the hot water is drawn out by the water pump 8. When the water pump 8 is turned off, the rebound component rebounds and pushes the heat exchange component back to block the opening at the bottom of the square heat exchanger 4 through the water pump pipe 5, preventing the hot water from contacting the cold air and losing heat, thus affecting the heat exchange efficiency.

[0036] Please see Figures 1 to 3 The heat exchange device 102 includes a spiral heat exchange tube 9 and a second insulation layer 14.

[0037] The spiral heat exchange tube 9 is spirally installed at the bottom of the first insulation layer 3. The outside of the spiral heat exchange tube 9 is in contact with the outside of the first temperature transfer device 6. The second insulation layer 14 is installed at the bottom of the first insulation layer 3 and at the center of the spiral heat exchange tube 9. The second insulation layer 14 is sleeved on the outside of the pumping pipe 5. The spiral heat exchange tube 9 spirals downward, and the hot water flows in the spiral heat exchange tube 9 for a longer time, resulting in a longer heat transfer time and a higher temperature of the hot water. The second insulation layer 14 is sleeved on the outside of the pumping pipe 5, so that the temperature of the hot water in the pumping pipe 5 will not be lost when the water pump 8 is turned on, thus improving the heat exchange efficiency.

[0038] Please see Figures 1 to 3 The bottom of the first empty tank 10 is equipped with a heat-insulating water storage tank 12 for storing water after heat exchange. The heat-insulating water storage tank 12 is fitted with a second heat transfer device 13 for heat preservation. The water pumping pipe 5 extends through the second heat transfer device 13 and is connected to the heat-insulating water storage tank 12. After the heat exchange water in the spiral heat exchange tube 9 is heated, it flows into the heat-insulating water storage tank 12 for storage. The second heat transfer device 13 outside the heat-insulating water storage tank 12 can continue to transfer heat to the heat exchange water inside the heat-insulating water storage tank 12, so that the temperature of the heat exchange water continues to rise. The water pumping pipe 5 is connected to the heat-insulating water storage tank 12, and the heat exchange water is pumped out for use through the water pumping pipe 5.

[0039] Please see Figures 1 to 5 The top of the spiral heat exchange tube 9 passes through the first insulation layer 3 and is equipped with a water inlet 7 for injecting water. The bottom of the spiral heat exchange tube 9 passes through the second temperature transmitter 13 and reaches the insulated water storage tank 12, where a water outlet 11 is installed. A scale cleaning component for cleaning the spiral heat exchange tube 9 can be placed outside the water inlet 7. An opening and closing component for removing the scale cleaning component is installed outside the square insulated tank 4. Hot water can enter the spiral heat exchange tube 9 through the water inlet 7 for heat transfer, and then flow into the insulated water storage tank 12 through the water outlet 11 for storage to prevent temperature loss. The scale cleaning component can enter the spiral heat exchange tube 9 through the water inlet 7 along with the hot water to clean the scale on its inner wall. The hot water is then pumped by the water pump 8 to the square insulated tank 4. The scale cleaning component can be removed and replaced through the opening and closing component.

[0040] Please see Figures 1 to 7 The insulation component includes a circular sealer 20, an opener / closer 21, and a threaded rod 22.

[0041] A threaded rod 22 is installed on one side of the bottom of the second empty slot 19. An opening and closing device 21 is rotatably connected to the outside of the threaded rod 22. A circular seal 20 is installed on the side of the opening and closing device 21 near the bottom of the square heat insulator 4 through which the water pipe 5 passes. The size of the circular seal 20 is adapted to the size of the opening at the bottom of the square heat insulator 4 through which the water pipe 5 passes. When the water pump 8 is turned on, pressure is generated to form centrifugal force. The opening and closing device 21 pulls the circular seal 20 into contact with the rebound assembly. When the water pump 8 is turned off, the rebound assembly pushes the circular seal 20 to block the opening at the bottom of the square heat insulator 4 through which the water pipe 5 passes, preventing the loss of hot water temperature.

[0042] Please see Figures 1 to 7 The rebound assembly includes a connecting plate 23, a spring 24, and a spring plate 25.

[0043] A connecting plate 23 is installed at the top of the second empty slot 19. A spring 24 is fixedly connected to the side of the connecting plate 23 near the circular seal 20. The other end of the spring 24 is fixedly connected to the side of the spring plate 25. The spring plate 25 can contact the circular seal 20. When the water pump 8 is turned on, the opening and closing device 21 pulls the circular seal 20 to contact the spring plate 25, and the spring 24 is compressed and contracted. When the water pump 8 is turned off, the compression force on the spring 24 disappears, and the spring 24 rebounds and pushes the circular seal 20 to close, blocking the opening at the bottom of the square heat exchanger 4 through which the water pipe 5 passes. This prevents the hot water from contacting the cold air and causing temperature loss.

[0044] Please see Figures 1 to 4 The scale removal assembly includes a rolling cleaning ball 15 and a cleaning sleeve 16;

[0045] The rolling cleaning ball 15 is made of rubber, and a cleaning sleeve 16 is fitted around its exterior. The rolling cleaning ball 15 can enter the spiral heat exchange tube 9 from the water inlet 7 and roll inside the spiral heat exchange tube 9 with the water flow. The cleaning sleeve 16 can contact the inner wall of the spiral heat exchange tube 9. The rolling cleaning ball 15 can flow out from the water outlet 11 into the heat-insulating water storage tank 12 with the water flow. The interior of the rolling cleaning ball 15 is hollow. The rolling cleaning ball 15 can enter the spiral heat exchange tube 9 from the water inlet 7. Under the impact of the hot water, the rolling cleaning ball 15 impacts inside the spiral heat exchange tube 9. The cleaning sleeve 16 on the outside of the rolling cleaning ball 15 contacts the inner wall of the spiral heat exchange tube 9 to clean the surface scale and prevent scale from accumulating and clogging the spiral heat exchange tube 9, thus affecting heat exchange.

[0046] Please see Figures 1 to 5 The opening and closing assembly includes a sealing switch plate 17 and a handle 18;

[0047] The square heat exchanger 4 is equipped with an openable and closable sealing switch plate 17. The sealing switch plate 17 is equipped with a handle 18 for opening the sealing switch plate 17. The rolling cleaning ball 15 flows into the heat exchange water storage tank 12. When the water pump 8 is turned on, the rolling cleaning ball 15 flows into the square heat exchanger 4 along with the hot water. When the water pump 8 is turned off, the circular seal 20 blocks the opening at the bottom of the square heat exchanger 4 through the water pumping pipe 5. The rolling cleaning ball 15 stays in the second empty slot 19. The sealing switch plate 17 can then be opened through the handle 18 to remove the rolling cleaning ball 15.

[0048] In summary, this geothermal well enhanced heat exchange auxiliary device, during use, firstly injects hot water through the inlet 7. The hot water spirals downwards in the outlet 9, which comes into contact with the first temperature transducer 6, which in turn contacts the surface geothermal reservoir layer. Temperature is transferred to the hot water. Because the hot water flows downwards spirally, it has a longer flow time in the outlet 9, resulting in a longer heating time and a higher temperature, reducing heat loss. The hot water then flows through the outlet 11 into the insulated water storage tank 12 for storage. The second temperature transducer 13 outside the insulated water storage tank 12 continues to transfer heat to the hot water, ensuring its temperature. When scale removal is required inside the outlet 9, a rolling cleaning ball 15 is injected through the inlet 7 simultaneously with the hot water injection. As the hot water flows through the inlet 9, the ball 15 continuously contacts the inner wall of the inlet 9, removing scale. The water then flows into the insulated water storage tank 12. Next, the water pump 8 is activated to generate pressure and centrifugal force, causing the insulation component to open the circular seal 20 and come into contact with the spring plate 25. The spring 24 is compressed and contracts, and the rolling cleaning ball 15 flows through the inlet pipe 5 with the hot water. When the water pump 8 is turned off, the spring 24 rebounds and pushes the spring plate 25, causing the circular seal 20 to cover the opening of the inlet pipe 5 through the square insulated tank 4, thus preventing the hot water stored in the insulated water storage tank 12 from losing its temperature. The rolling cleaning ball 15 falls into the second empty slot 19. At this time, the rolling cleaning ball 15 can be removed by opening the sealing switch plate 17 through the handle 18.

[0049] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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 utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, it 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. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances. Moreover, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0050] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A geothermal well enhanced heat exchange auxiliary device, comprising a geothermal well (1), wherein a water pump (8) for pumping water is installed at the top of the geothermal well (1), and a water pumping pipe (5) is installed at the bottom of the water pump (8), characterized in that: The geothermal well (1) has a first cavity (10) inside, and a first heat transfer device (6) for converting geothermal heat is installed in the first cavity (10). A heat exchange device (102) for absorbing geothermal heat is installed at the center of the first heat transfer device (6). The top of the geothermal well (1) is equipped with a sealing cover (2) for heat preservation, the top of the heat exchange device (102) is equipped with a first heat preservation layer (3), the top of the first heat preservation layer (3) is equipped with a square heat preservation device (4), the water pumping pipe (5) passes through the square heat preservation device (4) to reach the interior of the first empty slot (10), and the square heat preservation device (4) is equipped with a heat preservation device (101) for heat preservation. The square heat insulator (4) has a second slot (19) inside. The heat insulation device (101) includes a heat insulation component and a rebound component. The heat insulation component is installed at the bottom of the second slot (19) and can open and close after the water pump (8) is started. The rebound component is installed at the top of the second slot (19) and can push the heat insulation component in parallel to block the water pump pipe (5) to maintain the water temperature after the water pump (8) is turned off.

2. The geothermal well enhanced heat exchange auxiliary device according to claim 1, characterized in that: The heat exchange device (102) includes a spiral heat exchange tube (9) and a second insulation layer (14). The spiral heat exchange tube (9) is spirally installed at the bottom of the first insulation layer (3). The outside of the spiral heat exchange tube (9) is in contact with the outside of the first temperature transmitter (6). The second insulation layer (14) is installed at the bottom of the first insulation layer (3) and at the center of the spiral heat exchange tube (9). The second insulation layer (14) is sleeved on the outside of the pumping pipe (5).

3. The geothermal well enhanced heat exchange auxiliary device according to claim 2, characterized in that: The bottom of the first empty tank (10) is equipped with a heat-insulating water storage tank (12) for storing water after heat exchange. The heat-insulating water storage tank (12) is fitted with a second heat transfer device (13) for heat preservation. The water pumping pipe (5) extends through the second heat transfer device (13) and connects to the heat-insulating water storage tank (12).

4. The geothermal well enhanced heat exchange auxiliary device according to claim 3, characterized in that: The top of the spiral heat exchange tube (9) passes through the first insulation layer (3) and is equipped with a water inlet (7) for injecting water. The bottom of the spiral heat exchange tube (9) passes through the second heat transfer device (13) and reaches the heat-insulating water storage tank (12) where a water outlet (11) for outputting water is installed. A scale cleaning component for cleaning the spiral heat exchange tube (9) can be placed outside the water inlet (7). An opening and closing component for removing the scale cleaning component is installed outside the square heat insulator (4).

5. The geothermal well enhanced heat exchange auxiliary device according to claim 4, characterized in that: The thermal insulation component includes a circular sealer (20), an opener (21), and a threaded rod (22). A threaded rod (22) is installed on one side of the bottom of the second empty slot (19). An opening and closing device (21) is rotatably connected to the outside of the threaded rod (22). A circular seal (20) is installed on one side of the opening and closing device (21) near the water pumping pipe (5) through the bottom of the square heat insulator (4). The size of the circular seal (20) is adapted to the size of the opening through the bottom of the square heat insulator (4) of the water pumping pipe (5).

6. The geothermal well enhanced heat exchange auxiliary device according to claim 5, characterized in that: The rebound assembly includes a connecting plate (23), a spring (24), and a spring plate (25). A connecting plate (23) is installed at the top of the second slot (19). A spring (24) is fixedly connected to the side of the connecting plate (23) near the circular seal (20). The other end of the spring (24) is fixedly connected to the side of the spring plate (25). The spring plate (25) can contact the circular seal (20).

7. The geothermal well enhanced heat exchange auxiliary device according to claim 6, characterized in that: The scale removal assembly includes a rolling cleaning ball (15) and a cleaning sleeve (16). The rolling cleaning ball (15) is made of rubber. A cleaning sleeve (16) is fitted around the outside of the rolling cleaning ball (15). The rolling cleaning ball (15) can enter the spiral heat exchange tube (9) from the water inlet (7) and roll inside the spiral heat exchange tube (9) with the water flow. The cleaning sleeve (16) can contact the inner wall of the spiral heat exchange tube (9). The rolling cleaning ball (15) can flow out from the water outlet (11) to the heat preservation water storage tank (12) with the water flow.

8. The geothermal well enhanced heat exchange auxiliary device according to claim 7, characterized in that: The opening and closing assembly includes a sealing switch plate (17) and a handle (18). The square heat insulator (4) is equipped with an openable and closable sealing switch plate (17), and the sealing switch plate (17) is equipped with a handle (18) for opening the sealing switch plate (17).

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