Ground source heat pump same-well recharge system

Abstract

The utility model belongs to the field of ground source heat pump recharge, and provides a ground source heat pump same-well recharge system which comprises a water well, a heat pump arranged on one side of the water well and a dip pipe arranged at one end of the heat pump, a telescopic piece is arranged at one end of the recharge pipe, and another dip pipe extending to the position below the water surface in the water well is further arranged in the water well. The telescopic piece comprises a telescopic pipe arranged at one end of the recharge pipe and a sleeve arranged at one end of the telescopic pipe, the telescopic pipe can be arranged in the sleeve in a sliding mode, and the telescopic piece further comprises a sliding rod arranged on the circumferential side face of the sleeve, a fixing rod arranged on the inner side wall of a sliding ring, an inserting groove formed in one side of the sleeve and an inserting rod arranged on one side of the telescopic pipe. According to the ground source heat pump same-well recharge system, a plurality of recharge wells in the prior art do not need to be arranged, the purposes of same-well lifting and recharge are achieved, loss of water resources is prevented, and the effect of automatically cleaning the water wells is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of ground source heat pump reinjection technology, specifically a ground source heat pump in-well reinjection system. Background Technology

[0002] Ground source heat pumps are a technology that utilizes renewable energy. Due to their advantages such as economy, energy saving, and environmental protection, they have been widely used in building heating and cooling systems. In these systems, groundwater is often used as a heat or cold source to provide the required energy. However, after using groundwater as a heat or cold source, this water needs to be reinjected into the ground to maintain the sustainable use of water resources. Current technologies typically use one lift well with two or more reinjection wells of the same depth to achieve the goal of water reinjection at the same layer. This involves a large investment, and during operation, due to reasons such as untimely cleaning of the reinjection wells or failure to reach the same water source layer, the water cannot be 100% reinjected, leading to water loss or even depletion. Improvements are needed.

[0003] To address the problems raised in the background art, those skilled in the art have proposed a ground source heat pump co-well reinjection system. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a ground source heat pump co-injection system to solve the issues raised in the prior art.

[0005] A ground source heat pump reinjection system includes a well, a heat pump located on one side of the well, a suction pipe located at one end of the heat pump, and an extraction device located at one end of the suction pipe. The extraction device is connected to the end of the suction pipe that extends below the water surface in the well. One end of the heat pump is connected to a reinjection pipe, one end of which extends below the water surface in the well and the other end is connected to the heat pump. The portion of the well located between the upper and lower groundwater levels is divided into two water zones by an anti-mixing baffle. The suction port of the extraction device connected to the suction pipe and the end of the reinjection pipe extending into the well are located in the water zones on both sides of the anti-mixing baffle.

[0006] The suction port of the extraction device connected to the extraction pipe is lower than the end of the reinjection pipe that extends into the well. The end of the reinjection pipe that extends into the well is located on the upper groundwater level line, and the suction port of the extraction device is located below the lower groundwater level line of the well. One end of the reinjection pipe is equipped with a telescopic component. Another extraction pipe that extends into the well below the water surface is also provided in the well. The bottom end of the other extraction pipe is connected to an extraction device. The opening and closing state of the extraction device is opposite to that of the extraction device.

[0007] The telescopic component includes a telescopic tube disposed at one end of the reinjection pipe and a sleeve disposed at one end of the telescopic tube. The telescopic tube can be slidably disposed within the sleeve. The telescopic component also includes a sliding rod disposed on the circumferential side of the sleeve, a sliding ring slidably disposed on the outside of the sliding rod, a groove opened on one side of the sleeve, a fixing rod disposed on the inner side wall of the sliding ring, a slot opened on one side of the sleeve, and an insertion rod disposed on one side of the telescopic tube. The insertion rod extends into the slot and is slidably disposed therewith, and one end of the fixing rod is inserted into the insertion rod and fixed therewith.

[0008] Preferably, a return spring is sleeved on the outer side of the slide rod, a limit plate is fixedly connected to one end of the slide rod, and a locking bolt is threadedly connected to the circumferential side of the sleeve. The locking bolt passes through the sliding ring and is threadedly connected to it.

[0009] Preferably, the inlet of the reinjection pipe extends into the water area under the anti-mixing baffle, the suction device on the other suction pipe is activated, the extraction device is turned off, the water area above the anti-mixing baffle is the water intake area, and the water area below the anti-mixing baffle is the reinjection area.

[0010] Preferably, the inlet of the reinjection pipe is located in the water area of ​​the anti-mixing baffle, the suction device on the other suction pipe is closed, the extraction device is started, the water area above the anti-mixing baffle is the reinjection area, and the water area below the anti-mixing baffle is the water intake area.

[0011] Preferably, the suction port of the extraction device connected to the extraction pipe is higher than the end of the reinjection pipe extending into the well. The suction port of the extraction device is located on the upper groundwater level, and the end of the reinjection pipe extending into the well is located below the lower groundwater level of the well. The water area above the anti-mixing baffle is the water intake area, and the water area below the anti-mixing baffle is the reinjection area.

[0012] Preferably, the suction port of the extraction device connected to the extraction pipe is lower than the end of the reinjection pipe extending into the well. The end of the reinjection pipe extending into the well is located on the upper groundwater level line, and the suction port of the extraction device is located below the lower groundwater level line of the well. The water area above the anti-mixing baffle is the reinjection area, and the water area below the anti-mixing baffle is the water intake area.

[0013] Preferably, the suction port of the extraction device connected to the suction pipe is lower than the end of the reinjection pipe that extends into the well. The suction pipe and the reinjection pipe are each equipped with a first solenoid valve, and a connecting pipe is also connected between the suction pipe and the reinjection pipe. An inlet pipe is also connected to the suction pipe above the inlet of the reinjection pipe. The inlet pipe and the connecting pipe are each equipped with a second solenoid valve. The inlet pipe and the extraction device are located above the connecting pipe. The first solenoid valve and the second solenoid valve have opposite opening and closing states.

[0014] Preferably, when the first solenoid valve is closed and the second solenoid valve is open, the water area above the anti-mixing baffle is the water intake area, and the water area below the anti-mixing baffle is the recharge area.

[0015] When the first solenoid valve is open and the second solenoid valve is closed, the water area above the anti-mixing baffle is the recharge area, and the water area below the anti-mixing baffle is the water intake area.

[0016] Preferably, the recharge area is equipped with a sewage pump, a turbid water suction pipe connected to the sewage pump, and a sedimentation tank connected to the turbid water suction pipe, and the bottom of the sedimentation tank is equipped with a filter screen.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. This utility model extracts hot water resources from the water area above the anti-mixing baffle using an extraction device, and supplies them to a heat pump for external heating or cooling. The water resources after the heat is extracted or released are returned to the water area below or above the anti-mixing baffle through a return pipe. This eliminates the need for multiple return wells as in the prior art, saving investment and achieving the purpose of lifting and returning water from the same well, preventing water loss, and achieving the effect of automatically cleaning the water well.

[0019] 2. This utility model, through the inclusion of a telescopic component, allows for real-time adjustment of the reinjection pipe length as needed. This enables the intake and reinjection pipes to be adjusted accordingly based on changes in groundwater level or system operating mode (heating or cooling). This design enhances the system's adaptability, ensuring effective water extraction and reinjection under various conditions.

[0020] 3. This utility model includes an automatic well cleaning function, which helps maintain the cleanliness of the well and reduces maintenance costs and time. Regular automatic cleaning prevents siltation and blockage inside the well, thereby improving the well's permeability and the efficiency of the heat pump system, ensuring the long-term stable operation of the ground source heat pump system. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the second embodiment of the present utility model;

[0023] Figure 3 This is a structural schematic diagram of the third embodiment of the present utility model.

[0024] Figure 4 for Figure 3 Enlarged view of the structure at point A in the middle;

[0025] Figure 5 This is a cross-sectional view of the sleeve in this utility model;

[0026] Figure 6 for Figure 5 Enlarged view of the structure at point B in the middle;

[0027] Figure 7 This is a schematic diagram of the structure of the fourth embodiment of the present utility model;

[0028] In the picture:

[0029] 10. Well; 11. Upper groundwater level; 12. Lower groundwater level; 15. Anti-mixing baffle; 16. Water intake area; 18. Recharge area; 20. Suction pipe; 30. Extraction equipment; 31. Suction port; 41. Suction device; 50. Recharge pipe; 60. Connecting pipe; 70. Inlet pipe; 80. First solenoid valve; 81. Second solenoid valve; 90. Telescopic component; 91. Telescopic pipe; 92. Sleeve; 93. Slide rod; 931. Return spring; 932. Limiting plate; 94. Sliding ring; 95. Channel; 96. Fixing rod; 97. Slot; 98. Insert rod; 99. Locking bolt. Detailed Implementation

[0030] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0031] Example 1: As shown in the attached document Figure 1 As shown: This utility model provides a ground source heat pump reinjection system, including a water well 10, a heat pump set on one side of the water well 10, a suction pipe 20 set at one end of the heat pump, and an extraction device 30 set at one end of the suction pipe 20. The extraction device 30 is connected to the end of the suction pipe 20 that extends below the water surface in the water well 10. A reinjection pipe 50 is connected to one end of the heat pump. One end of the reinjection pipe 50 extends below the water surface in the water well 10 and the other end is connected to the heat pump. The part of the water well 10 between the upper groundwater level 11 and the lower groundwater level 12 is divided into two water zones set at different heights by a water-blocking baffle 15. The extraction device 30 can be a water pump, a self-priming pump, or a clean water pump, etc. In this embodiment, the suction port 31 of the extraction device 30 connected to the extraction pipe 20 is higher than the end of the reinjection pipe 50 that extends into the well 10. The suction port 31 of the extraction device 30 is located on the upper groundwater line 11, and the end of the reinjection pipe 50 that extends into the well 10 is located below the lower groundwater line 12 of the well 10. The water area above the anti-mixing baffle 15 is the water intake area 16, and the water area below the anti-mixing baffle 15 is the reinjection area 18. At this time, the ground source heat pump co-well reinjection system is suitable for the heating mode.

[0032] In use, the hot water resources in the water area above the anti-mixing baffle 15 are extracted by the extraction device 30 and supplied to the heat pump for external heating. The cooled water resources are returned to the water area below the anti-mixing baffle 15 through the return pipe 50. There is no need to set up multiple return wells as in the existing technology, saving investment. This achieves the purpose of lifting and returning water from the same well, preventing water loss and achieving the effect of automatically cleaning the water well 10.

[0033] Example 2: Figure 2 As shown, the structure of this embodiment is roughly the same as that of the first embodiment, except that: in this embodiment, the water inlet 31 of the extraction device 30 connected to the extraction pipe 20 is lower than the end of the reinjection pipe 50 that extends into the well 10. The end of the reinjection pipe 50 that extends into the well 10 is located on the upper groundwater line 11, and the water inlet 31 of the extraction device 30 is located below the lower groundwater line 12 of the well 10. The water area above the anti-mixing baffle 15 is the reinjection area 18, and the water area below the anti-mixing baffle 15 is the water intake area 16. At this time, the ground source heat pump co-well reinjection system is suitable for cooling mode.

[0034] In use, the cold water resources in the water area below the anti-mixing baffle 15 are extracted by the extraction device 30 and supplied to the heat pump for external cooling. The heated water resources are returned to the water area above the anti-mixing baffle 15 through the return pipe 50. There is no need to set up multiple return wells as in the existing technology, saving investment. This achieves the purpose of lifting and returning water from the same well, preventing water loss and achieving the effect of automatically cleaning the water well 10.

[0035] In specific implementation, the extraction pipe 20 and the reinjection pipe 50 in the above embodiments can be pipes with adjustable lengths, so as to adjust the position of their bottom ends in the water area according to the situation, thereby meeting the needs of the same water well 10 to adapt to different modes of heating and cooling.

[0036] Example 3: Figure 3-6As shown, the structure of this embodiment is roughly the same as that of the second embodiment, except that: in this embodiment, one end of the reinjection pipe 50 is provided with a telescopic member 90, and another suction pipe 20 extending below the water surface in the well 10 is also provided inside the well 10. The bottom end of the other suction pipe 20 is connected to a suction device 41. In heating mode, the pipe opening of the reinjection pipe 50 extends into the water area under the anti-mixing baffle 15, the suction device 41 on the other suction pipe 20 is activated, and the extraction device 30 is closed. At this time, the water area above the anti-mixing baffle 15 is the water intake area 16, and the water area below the anti-mixing baffle 15 is the reinjection area 18. In cooling mode, the pipe opening of the reinjection pipe 50 is located in the water area above the anti-mixing baffle 15, the suction device 41 on the other suction pipe 20 is closed, and the extraction device 30 is activated. At this time, the water area above the anti-mixing baffle 15 is the reinjection area 18, and the water area below the anti-mixing baffle 15 is the water intake area 16. This ground source heat pump reinjection system is suitable for single-well single-heat pump heating and cooling modes, and the two extraction devices can serve as backups for each other.

[0037] Preferably, the telescopic component 90 includes a telescopic tube 91 disposed at one end of the reinjection pipe 50 and a sleeve 92 disposed at one end of the telescopic tube 91. The telescopic tube 91 can be slidably disposed within the sleeve 92. The telescopic component 90 also includes a sliding rod 93 disposed on the peripheral side of the sleeve 92, a sliding ring 94 slidably disposed on the outer side of the sliding rod 93, a channel 95 opened on one side of the sleeve 92, a fixing rod 96 disposed on the inner side wall of the sliding ring 94, a slot 97 opened on one side of the sleeve 92, and a slot 97 disposed on the telescopic tube 91. 1. The insertion rod 98 on one side extends into the slot 97 and slides therewith. One end of the fixing rod 96 is inserted into the insertion rod 98 and fixed therewith. When in use, when it is necessary to adjust the length of the re-irrigation pipe 50, the sliding ring 94 is pulled. The sliding ring 94 drives the fixing rod 96 to move, thereby adjusting the insertion rod 98 and the telescopic pipe 91, ultimately realizing the telescopic adjustment of the telescopic pipe 91. Since one end of the telescopic pipe 91 is connected to the re-irrigation pipe 50, the telescopic adjustment function of the re-irrigation pipe 50 is finally realized.

[0038] Specifically, a return spring 931 is sleeved on the outer side of the slide rod 93. The return spring 931 is used to drive the sliding ring 94 to reset. One end of the slide rod 93 is fixedly connected to a limit plate 932. The limit plate 932 is used to limit the sliding ring 94 to prevent it from falling off. A locking bolt 99 is threadedly connected to the circumferential side of the sleeve 92. The locking bolt 99 passes through the sliding ring 94 and is threadedly connected to it. The locking bolt 99 is used to lock and fix the telescopic tube 91 after it has been adjusted to a specified length.

[0039] In specific implementation, the length of the reinjection pipe 50 is adjusted as needed. During adjustment, the sliding ring 94 is pulled, and the sliding ring 94 drives the fixed rod 96 to move, thereby adjusting the insertion rod 98 and the telescopic pipe 91 to achieve the telescopic adjustment of the telescopic pipe 91. Since one end of the telescopic pipe 91 is connected to the reinjection pipe 50, the telescopic adjustment function of the reinjection pipe 50 is finally realized. After the adjustment is completed, the sliding plate is locked and fixed by the locking bolt 99, thereby fixing and locking the telescopic pipe 91. Then it can be used. When in use, the geothermal heat pump reinjection system also includes a self-priming pump located outside the water well 10 and a row of sand pipes connected to the self-priming pump and extending its end to the anti-mixing baffle 15 to pump the mud and sand settled on the baffle to the outside of the well for discharge. In practice, the ground source heat pump reinjection system also includes a sewage pump located in the reinjection area 18, a turbid water suction pipe connected to the sewage pump, and a sedimentation tank connected to the turbid water suction pipe. The bottom of the sedimentation tank is equipped with a filter screen to improve the anti-clogging ability of the well 10 and enhance the permeability of the reinjection water, thereby achieving the purpose of fully extracting and utilizing the heat of groundwater resources, saving operating costs and maintenance expenses, and extending its service life.

[0040] Example 4: As shown in the figure, this example has a structure that is largely the same as the second example, except that: in this example, the extraction pipe 20 and the reinjection pipe 50 are respectively equipped with a first solenoid valve 80, and a connecting pipe 60 is also provided between the extraction pipe 20 and the reinjection pipe 50. A water inlet pipe 70 is also connected to the extraction pipe 20 above the inlet of the reinjection pipe 50. The water inlet pipe 70 and the connecting pipe 60 are respectively equipped with a second solenoid valve 81. The water inlet pipe 70 and the extraction device 30 are located above the connecting pipe 60. In use, when in heating mode... When the first solenoid valve 80 on the suction pipe 20 and the return pipe 50 is closed, the second solenoid valve 81 on the connecting pipe 60 and the inlet pipe 70 is opened. At this time, the water area above the anti-mixing baffle 15 is the water intake area 16, and the water area below the anti-mixing baffle 15 is the return area 18. When the cooling mode is used, the first solenoid valve 80 on the suction pipe 20 and the return pipe 50 is opened, and the second solenoid valve 81 on the inlet pipe 70 and the connecting pipe 60 is closed. At this time, the water area above the anti-mixing baffle 15 is the return area 18, and the water area below the anti-mixing baffle 15 is the water intake area 16.

[0041] The embodiments of this utility model are given for the purpose of illustration and description. Although embodiments of this utility model have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the utility model. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this utility model.

[0042] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. "A plurality of" means two or more, unless otherwise explicitly specified.

[0043] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0044] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0045] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0046] The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0047] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A ground source heat pump reinjection system, characterized in that: The device includes a water well (10), a heat pump located on one side of the water well (10), a suction pipe (20) located at one end of the heat pump, and an extraction device (30) located at one end of the suction pipe (20). The extraction device (30) is connected to the end of the suction pipe (20) that extends below the water surface in the water well (10). A reinjection pipe (50) is connected to one end of the heat pump. One end of the reinjection pipe (50) extends below the water surface in the water well (10), and the other end is connected to the heat pump. The part of the water well (10) located between the upper groundwater line (11) and the lower groundwater line (12) is divided into two water zones set up above and below by a water-blocking baffle (15). The suction port (31) of the extraction device (30) connected to the suction pipe (20) and the end of the reinjection pipe (50) that extends into the water well (10) are respectively located in the water zones on both sides of the water-blocking baffle (15). The suction port (31) of the extraction device (30) connected to the suction pipe (20) is lower than the end of the reinjection pipe (50) that extends into the well (10). The end of the reinjection pipe (50) that extends into the well (10) is located on the upper groundwater level (11). The suction port (31) of the extraction device (30) is located below the lower groundwater level (12) of the well (10). One end of the reinjection pipe (50) is provided with a telescopic component (90). Another suction pipe (20) extending into the well (10) below the water surface is also provided in the well (10). The bottom end of the other suction pipe (20) is connected to a suction device (41). The opening and closing state of the suction device (41) is opposite to that of the extraction device (30). The telescopic component (90) includes a telescopic tube (91) disposed at one end of the reinjection pipe (50) and a sleeve (92) disposed at one end of the telescopic tube (91). The telescopic tube (91) can be slidably disposed within the sleeve (92). The telescopic component (90) also includes a sliding rod (93) disposed on the periphery of the sleeve (92), a sliding ring (94) slidably disposed on the outside of the sliding rod (93), a channel (95) opened on one side of the sleeve (92), a fixing rod (96) disposed on the inner side wall of the sliding ring (94), a slot (97) opened on one side of the sleeve (92), and an insertion rod (98) disposed on one side of the telescopic tube (91). The insertion rod (98) extends into the slot (97) and is slidably disposed therewith. One end of the fixing rod (96) is inserted into the insertion rod (98) and is fixed therewith.

2. The ground source heat pump reinjection system as described in claim 1, characterized in that: A return spring (931) is sleeved on the outside of the slide rod (93). A limit plate (932) is fixedly connected to one end of the slide rod (93). A locking bolt (99) is threadedly connected to the circumferential side of the sleeve (92). The locking bolt (99) passes through the sliding ring (94) and is threadedly connected to it.

3. The ground source heat pump reinjection system as described in claim 2, characterized in that: The inlet of the recharge pipe (50) extends into the water area under the anti-mixing baffle (15), the suction device (41) on the other suction pipe (20) is activated, the extraction device (30) is turned off, the water area above the anti-mixing baffle (15) is the water intake area (16), and the water area below the anti-mixing baffle (15) is the recharge area (18).

4. The ground source heat pump reinjection system as described in claim 2, characterized in that: The inlet of the recharge pipe (50) is located in the water area on the anti-mixing baffle (15). The suction device (41) on the other suction pipe (20) is closed, and the extraction device (30) is started. The water area above the anti-mixing baffle (15) is the recharge area (18), and the water area below the anti-mixing baffle (15) is the water intake area (16).

5. The ground source heat pump reinjection system as described in claim 1, characterized in that: The suction port (31) of the extraction device (30) connected to the extraction pipe (20) is higher than the end of the reinjection pipe (50) that extends into the well (10). The suction port (31) of the extraction device (30) is located on the upper groundwater line (11). The end of the reinjection pipe (50) that extends into the well (10) is located below the lower groundwater line (12) of the well (10). The water area above the anti-mixing baffle (15) is the water intake area (16), and the water area below the anti-mixing baffle (15) is the reinjection area (18).

6. The ground source heat pump reinjection system as described in claim 1, characterized in that: The suction port (31) of the extraction device (30) connected to the extraction pipe (20) is lower than the end of the reinjection pipe (50) that extends into the well (10). The end of the reinjection pipe (50) that extends into the well (10) is located on the upper groundwater line (11). The suction port (31) of the extraction device (30) is located below the lower groundwater line (12) of the well (10). The water area above the anti-mixing baffle (15) is the reinjection area (18), and the water area below the anti-mixing baffle (15) is the water intake area (16).

7. The ground source heat pump reinjection system as described in claim 1, characterized in that: The suction port (31) of the extraction device (30) connected to the suction pipe (20) is lower than the end of the reinjection pipe (50) that extends into the well (10). The suction pipe (20) and the reinjection pipe (50) are respectively equipped with a first solenoid valve (80), and a connecting pipe (60) is also connected between the suction pipe (20) and the reinjection pipe (50). A water inlet pipe (70) is also connected to the suction pipe (20) above the pipe opening of the reinjection pipe (50). The water inlet pipe (70) and the connecting pipe (60) are respectively equipped with a second solenoid valve (81). The water inlet pipe (70) and the extraction device (30) are located above the connecting pipe (60). The first solenoid valve (80) and the second solenoid valve (81) have opposite opening and closing states.

8. The ground source heat pump reinjection system as described in claim 7, characterized in that: When the first solenoid valve (80) is closed and the second solenoid valve (81) is open, the water area above the anti-mixing baffle (15) is the water intake area (16), and the water area below the anti-mixing baffle (15) is the recharge area (18). When the first solenoid valve (80) is open and the second solenoid valve (81) is closed, the water area above the anti-mixing baffle (15) is the recharge area (18), and the water area below the anti-mixing baffle (15) is the water intake area (16).

9. The ground source heat pump reinjection system as described in claim 8, characterized in that: The recharge area (18) is equipped with a sewage pump, a turbid water suction pipe connected to the sewage pump, and a sedimentation tank connected to the turbid water suction pipe. The bottom of the sedimentation tank is equipped with a filter screen.

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