A heat exchange well depth detection device for a ground source heat pump

Abstract

The present invention discloses a heat exchange well depth detection device for a ground source heat pump, which relates to the technical field of heat exchange well depth detection. A winding roller is fixedly sleeved on a rotating shaft, and a locking assembly for unidirectionally locking the rotating shaft is installed on a U-shaped switching frame. A flexible tube is wound on the winding roller, an inflation assembly for inflating the inside of the flexible tube is installed on a support frame, a falling cylinder is fixed at the lower end of the flexible tube, and an extension support assembly is installed between a turning frame and the falling cylinder. During the inflation of the flexible tube by the inflation assembly of the present invention, pressurized air can enter the inside of the central cylinder and be dispersed into a plurality of radial tubes and a pushing cylinder, so that the pushing cylinder can push the turning frame to rotate. Under the action of the extension support assembly, the extension frame can extend relative to the falling cylinder and abut against the inner wall of the heat exchange well, effectively ensuring the stable position of the falling cylinder and preventing it from shaking, and significantly improving the accuracy of the depth detection of the heat exchange well.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchange well depth detection, and specifically to a heat exchange well depth detection device for a ground source heat pump. Background Technique

[0002] A ground source heat pump is an efficient energy-saving and environmental protection air conditioning system that can both heat and cool using shallow geothermal resources underground. By inputting a small amount of electrical energy, the ground source heat pump can transfer energy from a low-temperature heat source to a high-temperature heat source. In winter, it "extracts" the heat from the soil, raises the temperature, and supplies it to the indoor for heating; in summer, it "extracts" the heat from the indoor and releases it into the soil, and can ensure the balance of the underground temperature throughout the year.

[0003] When detecting the depth of the heat exchange well of a ground source heat pump, the existing depth detection device drops a lead block into the heat exchange well through a rope, and measures the depth of the heat exchange well by the length of the rope laid. However, during the depth detection process, it is very easy to cause the rope to tilt and shake. At the same time, the stability of the lead block inside the heat exchange well is poor, and it is also easy to generate large shaking, resulting in inaccurate depth detection results of the heat exchange well. In view of the above technical defects of the prior art, for this reason, a heat exchange well depth detection device for a ground source heat pump is provided to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a heat exchange well depth detection device for a ground source heat pump to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A heat exchange well depth detection device for a ground source heat pump comprises a support frame, a circular hole is opened on the support frame, a rotating shaft is rotatably mounted on the support frame, a hand crank is fixed to the end of the rotating shaft, a winding roller is fixedly sleeved on the rotating shaft, a U-shaped switching frame is slidably mounted on the support frame, a locking assembly for one-way locking of the rotating shaft is installed on the U-shaped switching frame, a flexible tube is wound on the winding roller, an inflation assembly for inflating the inside of the flexible tube is installed on the support frame, the flexible tube passes through the center of the circular hole, a fixed sleeve sleeved on the flexible tube is fixed on the support frame, and the fixed sleeve A limit assembly for laterally clamping the flexible tube is installed on the tube, a sinker is fixed at the lower end of the flexible tube, an ultrasonic generator is installed on the sinker, an ultrasonic receiver corresponding to the ultrasonic generator is fixed on the edge of the circular hole, a central tube connected to the flexible tube is fixed in the sinker, a plurality of radial tubes are installed on the central tube, a push tube is sealingly and slidingly sleeved on the radial tube, a plurality of bogies corresponding to the push tubes are rotatably installed on the side wall of the sinker, a torsion spring is connected between the bogie and the sinker, and an extension support assembly is installed between the bogie and the sinker.

[0007] As an improved solution of the present invention: the limiting assembly includes a plurality of rotating frames rotatably mounted on the side wall of the fixed sleeve, and a guide wheel abutting against the side wall of the flexible tube is rotatably mounted on the lower end of the rotating frame.

[0008] As an improved solution of the present invention: the limiting assembly also includes a lifting sleeve threadedly sleeved on the fixed sleeve, the lifting sleeve is rotatably mounted with a threaded sleeve, the support frame is rotatably mounted with a rotating sleeve, the rotating sleeve is slidably sleeved on the threaded sleeve, and the lifting sleeve abuts against the rotating frame.

[0009] As an improved solution of the present invention: the side wall of the threaded sleeve is fixed with an inner wall slidably embedded in the rotating sleeve, a screwing wheel is rotatably mounted on the support frame, and a pulley mechanism is transmission-connected between the screwing wheel and the threaded sleeve.

[0010] As an improved solution of the present invention: the extension support assembly includes an extension frame slidably mounted on the bogie, a traction frame is hinged between the extension frame and the sinking tube, and the end of the push tube is provided with an inclined surface abutting against the bogie.

[0011] As an improved solution of the present invention: the extension support assembly also includes a sleeve disc fixedly sleeved on the push tube, a spring ring is fixed between the sleeve disc and the inner wall of the sinking tube, a sliding plate is fixed on the sleeve disc, and a clamping assembly for limiting the sliding plate is installed on the sinking tube.

[0012] As an improved solution of the present invention: The clamping component includes an extension plate fixed to the inner wall of the falling cylinder. A triangular insertion block is vertically and slidably installed on the extension plate. A first pushing spring is fixed between the triangular insertion block and the extension plate. A V-groove adapted for insertion of the triangular insertion block is formed on the sliding plate.

[0013] As an improved solution of the present invention: The locking component includes a first check disk and a second check disk coaxially fixed to the rotating shaft. A plurality of first wedge grooves are circumferentially and evenly formed on the first check disk. A plurality of second wedge grooves are circumferentially and evenly formed on the second check disk. A first wedge tooth and a second wedge block are respectively slidably installed at both ends of the U-shaped switching frame. The first wedge tooth is in clamping fit with the first wedge groove, and the second wedge block is in clamping fit with the second wedge groove. A second pushing spring is fixedly connected between the first wedge tooth and the U-shaped switching frame and between the second wedge block and the U-shaped switching frame.

[0014] As an improved solution of the present invention: The inflation component includes an air pump fixed to the support frame. The air outlet of the air pump is connected to a valve. An intake pipe is installed on the valve. An intake pipe communicating with the flexible pipe is installed inside the rotating shaft and the winding roller. The part of the intake pipe located inside the rotating shaft is coaxially arranged with the rotating shaft. The intake pipe is communicated with the intake pipe through a rotary joint.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] Through the arranged limiting component, the present invention can laterally support the flexible pipe, enabling the flexible pipe to extend vertically into the heat exchange well. The downward movement and transportation of the flexible pipe are more stable. By injecting air into the flexible pipe, the flexible pipe can be straightened during transportation, effectively reducing the shaking of the flexible pipe, effectively improving the stability of the depth detection of the heat exchange well, and effectively improving the accuracy of the depth detection.

[0017] During the inflation of the flexible pipe by the inflation component of the present invention, the pressurized air can enter the central cylinder and be dispersed into multiple radial pipes and the pushing cylinders, enabling the pushing cylinders to push the steering frame to rotate. Under the action of the extension support component, the extension frame can extend relative to the falling cylinder and abut against the inner wall of the heat exchange well, effectively ensuring the stable position of the falling cylinder, preventing it from shaking, and significantly improving the accuracy of the depth detection of the heat exchange well. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the present invention;

[0019] Figure 2 is of the present invention Figure 1 an enlarged schematic view of part A in;

[0020] Figure 3 is of the present invention Figure 1Structural schematic diagram from a certain perspective;

[0021] Figure 4 Schematic connection diagram of components such as the winding roller, rotating shaft, air inlet pipe, and flexible pipe in the present invention;

[0022] Figure 5 Schematic connection diagram of the rotating shaft, U-shaped switching frame, and locking component in the present invention;

[0023] Figure 6 Schematic connection diagram of wedge tooth I, wedge block II, thrust spring II, and U-shaped switching frame in the present invention;

[0024] Figure 7 Structural schematic diagram of the limit component in the present invention;

[0025] Figure 8 Partial structural schematic diagram of the present invention;

[0026] Figure 9 Schematic connection diagram of the bogie, thrust cylinder, and extension support component in the present invention;

[0027] Figure 10 Schematic connection diagram of components such as the thrust cylinder, sleeve disc, and sliding plate in the present invention.

[0028] In the figure: 1 - support frame, 2 - round hole, 3 - winding roller, 4 - air pump, 5 - valve, 6 - air inlet pipe, 7 - flexible pipe, 8 - dropping cylinder, 9 - ultrasonic generator, 10 - ultrasonic receiver, 11 - guide wheel, 12 - lifting sleeve, 13 - hand crank, 14 - screwing wheel, 15 - pulley mechanism, 16 - extension frame, 17 - elbow pipe, 18 - check disk I, 19 - wedge tooth I, 20 - check disk II, 21 - rotating shaft, 22 - U-shaped switching frame, 23 - thrust spring I, 24 - rotary joint, 25 - rotating frame, 26 - triangular plug, 27 - wedge groove I, 28 - wedge block II, 29 - wedge groove II, 30 - rotating sleeve, 31 - clamping strip, 32 - threaded sleeve, 33 - thrust spring II, 34 - fixed sleeve, 35 - central cylinder, 36 - sliding plate, 37 - thrust cylinder, 38 - bogie, 39 - traction frame, 40 - extension plate, 41 - inclined plane, 42 - spring coil, 43 - sleeve disc, 44 - radial pipe, 45 - V groove, 46 - torsion spring. Specific embodiments

[0029] The technical solutions of the present invention will be further described in detail below in conjunction with specific embodiments:

[0030] First embodiment: Please refer to the appendix Figure 1 - appendix Figure 10A heat exchange well depth detection device for a ground source heat pump comprises a support frame 1, a circular hole 2 is opened on the support frame 1, a rotating shaft 21 is rotatably installed on the support frame 1, a hand crank 13 is fixed to the end of the rotating shaft 21, a winding roller 3 is fixedly sleeved on the rotating shaft 21, a U-shaped switching frame 22 is slidably installed on the support frame 1, a locking component for one-way locking of the rotating shaft 21 is installed on the U-shaped switching frame 22, a flexible tube 7 is wound on the winding roller 3, an inflation component for inflating the inside of the flexible tube 7 is installed on the support frame 1, the flexible tube 7 passes through the center of the circular hole 2, a fixed sleeve 34 sleeved on the flexible tube 7 is fixed on the support frame 1, and a fixed sleeve 34 is fixed on the fixed sleeve 34 A limit assembly for laterally clamping the flexible tube 7 is installed, a drop tube 8 is fixed at the lower end of the flexible tube 7, an ultrasonic generator 9 is installed on the drop tube 8, an ultrasonic receiver 10 corresponding to the ultrasonic generator 9 is fixed on the edge of the circular hole 2, a central tube 35 connected to the flexible tube 7 is fixed in the drop tube 8, a plurality of radial tubes 44 are installed on the central tube 35, a push tube 37 is sealingly and slidingly sleeved on the radial tube 44, a plurality of bogies 38 corresponding to the push tubes 37 are rotatably installed on the side wall of the drop tube 8, a torsion spring 46 is connected between the bogie 38 and the drop tube 8, and an extension support assembly is installed between the bogie 38 and the drop tube 8.

[0031] When the depth of the heat exchange well of the ground source heat pump is detected by using this device, the circular hole 2 is placed opposite to the wellhead of the heat exchange well, and the rotating shaft 21 is driven to rotate by shaking the hand crank 13. The rotating shaft 21 drives the winding roller 3 to rotate to release the flexible pipe 7 wound thereon, so that the drop tube 8 enters the heat exchange well under the traction of the flexible pipe 7, the ultrasonic generator 9 emits ultrasonic waves, and the ultrasonic receiver 10 receives the ultrasonic signal. The ultrasonic signal is analyzed by an external processor electrically connected to the ultrasonic receiver 10 to obtain the depth of the heat exchange well.

[0032] The position limiting assembly of the device includes a plurality of rotating frames 25 rotatably mounted on the side wall of the fixed sleeve 34, and a guide wheel 11 abutting against the side wall of the flexible tube 7 is rotatably mounted on the lower end of the rotating frame 25. The position limiting assembly also includes a lifting sleeve 12 threadedly sleeved on the fixed sleeve 34, and a threaded sleeve 32 is rotatably mounted on the lifting sleeve 12. A rotating sleeve 30 is rotatably mounted on the support frame 1, and the rotating sleeve 30 is slidably sleeved on the threaded sleeve 32, and the lifting sleeve 12 abuts against the rotating frame 25. A clamping strip 31 slidably embedded in the inner wall of the rotating sleeve 30 is fixed to the side wall of the threaded sleeve 32, and a screwing wheel 14 is rotatably mounted on the support frame 1, and a pulley mechanism 15 is transmission-connected between the screwing wheel 14 and the threaded sleeve 32.

[0033] With the above settings, the selection knob 14 can drive the rotation of the rotating sleeve 30 through the pulley mechanism 15. The rotating sleeve 30 drives the threaded sleeve 32 to rotate through the clamping strip 31. Under the action of the thread of the fixed sleeve 34, the threaded sleeve 32 drives the lifting sleeve 12 to move vertically downward. At this time, the lifting sleeve 12 pushes against the rotating frame 25, and multiple rotating frames 25 respectively drive the guide wheels 11 thereon to move towards the flexible tube 7, so that the guide wheels 11 are in contact with the internally inflated flexible tube 7, playing a role in limiting and guiding the laying and downward movement process of the flexible tube 7, and ensuring the stable downward movement of the flexible tube 7 together with the falling cylinder 8.

[0034] In addition, the extension support assembly includes an extension frame 16 slidably mounted on the bogie 38. There is a traction frame 39 hinged between the extension frame 16 and the falling cylinder 8. The end of the pushing cylinder 37 is provided with an inclined surface 41 in contact with the bogie 38. The extension support assembly further includes a disc 43 fixedly sleeved on the pushing cylinder 37. A spring ring 42 is fixed between the disc 43 and the inner wall of the falling cylinder 8. A sliding plate 36 is fixed on the disc 43, and a clamping assembly for limiting the sliding plate 36 is installed on the falling cylinder 8.

[0035] Specifically, the clamping assembly includes an extension plate 40 fixed on the inner wall of the falling cylinder 8. A triangular plug 26 is vertically slidably mounted on the extension plate 40. A pushing spring I 23 is fixed between the triangular plug 26 and the extension plate 40. The sliding plate 36 is provided with a V-groove 45 adapted to be inserted with the triangular plug 26.

[0036] Based on the above settings, during the process of the inflation assembly filling air into the flexible tube 7, the air enters the inner part of the central tube 35 and then disperses into each radial tube 44. After the flexible tube 7 is filled with air and the internal air pressure reaches a certain value, the air pushes the pushing cylinder 37 to slide relative to the radial tube 44, and the sliding plate 36 slides relative to the triangular plug 26, that is, the triangular plug 26 is not clamped in the V-groove 45. Before the pushing cylinder 37 slides relative to the radial tube 44, due to the triangular plug 26 being stably clamped in the V-groove 45 under the pushing action of the pushing spring I 23, a temporary stable locking effect on the pushing cylinder 37 is achieved, ensuring that the bogie 38 will rotate only after the flexible tube 7 is filled with air, avoiding the premature rotation of the bogie 38 and its contact with the inner wall of the heat exchange well, and ensuring the smooth downward movement of the falling cylinder 8 into the heat exchange well.

[0037] During the process of the pushing cylinder 37 sliding relative to the radial pipe 44, the pushing cylinder 37 pushes the bogie 38 to rotate, so that the distance between the end of the bogie 38 and the falling cylinder 8 is enlarged. At the same time, under the traction of the traction frame 39, while the extension frame 16 rotates with the bogie 38, the extension frame 16 also slides relative to the bogie 38, further increasing the distance between the extension frame 16 and the falling cylinder 8, ensuring that the extension frame 16 can stably abut against the inner wall of the heat exchange well and quickly and stably position the falling cylinder 8, effectively ensuring the stability and accuracy of the depth detection of the heat exchange well.

[0038] Second Embodiment: Please refer to the attached Figure 1 - attached Figure 10 , on the basis of the first embodiment, in addition, the locking assembly includes a check disk I 18 and a check disk II 20 coaxially fixed on the rotating shaft 21. A plurality of wedge grooves I 27 are circumferentially and uniformly formed on the check disk I 18, and a plurality of wedge grooves II 29 are circumferentially and uniformly formed on the check disk II 20. Wedge teeth I 19 and wedge blocks II 28 are respectively and slidably installed at both ends of the U-shaped switching frame 22. The wedge surfaces of the wedge teeth I 19 and the wedge blocks II 28 face in opposite directions. The wedge teeth I 19 are in snap-fit connection with the wedge grooves I 27, the wedge blocks II 28 are in snap-fit connection with the wedge grooves II 29, and thrust springs II 33 are fixedly connected between the wedge teeth I 19 and the wedge blocks II 28 and the U-shaped switching frame 22.

[0039] Through the structural setting of the above-mentioned locking assembly, when the winding roller 3 pays out the flexible pipe 7, by sliding the U-shaped switching frame 22, the wedge teeth I 19 are switched to be in snap-fit connection with the wedge grooves I 27. At this time, the wedge blocks II 28 are in a separated state from the wedge grooves II 29. At this time, the winding roller 3 can only rotate clockwise to pay out the flexible pipe 7, and the winding roller 3 cannot rotate in the reverse direction, ensuring that the flexible pipe 7 drives the falling cylinder 8 to move down stably. When it is necessary to wind up the flexible pipe 7, by sliding the U-shaped switching frame 22, the wedge blocks II 28 are switched to be in snap-fit connection with the wedge grooves II 29. At this time, the wedge teeth I 19 are in a separated state from the wedge grooves I 27, that is, at this time, the winding roller 3 can only rotate counterclockwise to wind up the flexible pipe 7, ensuring that the flexible pipe 7 can be stably wound around the winding roller 3. The above switching operation is simple and convenient, greatly ensuring the stability of the payout and winding of the flexible pipe 7.

[0040] The inflation assembly of the present device includes an air pump 4 fixed on the support frame 1. The air outlet of the air pump 4 is connected to a valve 5. An air inlet pipe 6 is installed on the valve 5. An air inlet pipe 6 communicating with the flexible pipe 7 is installed inside the rotating shaft 21 and the winding roller 3. The part of the air inlet pipe 6 located inside the rotating shaft 21 is coaxially arranged with the rotating shaft 21, and the air inlet pipe 6 is communicated with the air inlet pipe 6 through a rotary joint 24.

[0041] Through the above settings, the compressed air generated by the air pump 4 can enter the elbow pipe 17 through the air inlet pipe 6, thereby achieving the inflation effect of the flexible pipe 7, ensuring that the flexible pipe 7 entering the heat exchange well is in a straightened state due to being filled with compressed air inside, well overcoming the defects that the existing ropes are prone to shaking and twisting, effectively improving the stability of the downward movement of the dropping cylinder 8, and enhancing the depth detection accuracy of the heat exchange well.

[0042] In summary, through the arranged limiting component, the present invention can laterally support the flexible pipe 7, enabling the flexible pipe 7 to extend into the heat exchange well along the vertical direction, and the downward transportation of the flexible pipe 7 is more stable. By injecting air into the flexible pipe 7, the flexible pipe 7 can be straightened during transportation, effectively reducing the shaking of the flexible pipe 7, effectively improving the depth detection stability of the heat exchange well, and effectively enhancing the depth detection accuracy. During the inflation of the flexible pipe 7 by the inflation component of the present invention, the pressurized air can enter the central cylinder 35 and be dispersed into a plurality of radial pipes 44 and the pushing cylinder 37, enabling the pushing cylinder 37 to drive the bogie 38 to rotate. Under the action of the extension support component, the extension frame 16 can extend relative to the dropping cylinder 8 and abut against the inner wall of the heat exchange well, effectively ensuring the position stability of the dropping cylinder 8, preventing it from shaking, and significantly enhancing the depth detection accuracy of the heat exchange well.

Claims

1. A heat exchange well depth detection device for a ground source heat pump, comprising a support frame (1), a circular hole (2) is formed on the support frame (1), a rotating shaft (21) is rotatably mounted on the support frame (1), a hand crank (13) is fixed to the end of the rotating shaft (21), a winding roller (3) is fixedly sleeved on the rotating shaft (21), characterized in that: A U-shaped switching frame (22) is slidably mounted on the support frame (1), a locking assembly for unidirectionally locking the rotating shaft (21) is mounted on the U-shaped switching frame (22), a flexible tube (7) is wound on the winding roller (3), an inflation assembly for inflating the inside of the flexible tube (7) is mounted on the support frame (1), the flexible tube (7) passes through the center of the circular hole (2), a fixed sleeve (34) sleeved on the flexible tube (7) is fixed on the support frame (1), and the A stopper assembly for laterally clamping the flexible tube (7) is mounted on the fixed sleeve (34); a drop tube (8) is fixed at the lower end of the flexible tube (7); an ultrasonic generator (9) is mounted on the drop tube (8); an ultrasonic receiver (10) corresponding to the ultrasonic generator (9) is fixed at the edge of the circular hole (2); a central tube (35) connected to the flexible tube (7) is fixed in the drop tube (8); a plurality of radial tubes (44) are mounted on the central tube (35); A push tube (37) is sealed and slidably sleeved on the radial tube (44); a plurality of bogies (38) corresponding to the push tubes (37) are rotatably mounted on the side wall of the sinking tube (8); a torsion spring (46) is connected between the bogie (38) and the sinking tube (8); an extension support assembly is installed between the bogie (38) and the sinking tube (8); the extension support assembly includes an extension frame (16) slidably mounted on the bogie (38); the extension frame (16) is connected to the sinking tube (8); A traction frame (39) is hinged between the sinking tube (8), an end of the push tube (37) is provided with an inclined surface (41) abutting against the bogie (38), the extension support assembly further comprises a sleeve (43) fixedly sleeved on the push tube (37), a spring ring (42) is fixed between the sleeve (43) and the inner wall of the sinking tube (8), a sliding plate (36) is fixed on the sleeve (43), and a clamping assembly for limiting the sliding plate (36) is installed on the sinking tube (8).

2. A heat exchange well depth detection device for a ground source heat pump according to claim 1, characterized in that: The limiting assembly comprises a plurality of rotating frames (25) rotatably mounted on the side wall of the fixed sleeve (34), and a guide wheel (11) is rotatably mounted on the lower end of the rotating frame (25) and abuts against the side wall of the flexible tube (7).

3. A heat exchange well depth detection device for a ground source heat pump according to claim 2, characterized in that: The limiting assembly further comprises a lifting sleeve (12) threadedly sleeved on the fixed sleeve (34), a threaded sleeve (32) being rotatably mounted on the lifting sleeve (12), a rotating sleeve (30) being rotatably mounted on the support frame (1), the rotating sleeve (30) being slidably sleeved on the threaded sleeve (32), and the lifting sleeve (12) being in abutment with the rotating frame (25).

4. A heat exchange well depth detection device for a ground source heat pump according to claim 3, characterized in that: A clamping strip (31) slidably embedded in the inner wall of the rotating sleeve (30) is fixed to the side wall of the threaded sleeve (32), a screwing wheel (14) is rotatably mounted on the support frame (1), and a pulley mechanism (15) is transmission-connected between the screwing wheel (14) and the threaded sleeve (32).

5. The heat exchange well depth detection device for a ground source heat pump according to claim 1, characterized in that: The clamping assembly comprises an extension plate (40) fixed to the inner wall of the falling tube (8), a triangular plug block (26) being vertically slidably mounted on the extension plate (40), a push spring I (23) being fixed between the triangular plug block (26) and the extension plate (40), and a V-groove (45) being plug-fitted with the triangular plug block (26) being provided on the sliding plate (36).

6. A heat exchange well depth detection device for a ground source heat pump according to claim 1, characterized in that: The locking assembly comprises a check plate I (18) and a check plate II (20) coaxially fixed on the rotating shaft (21); a plurality of wedge grooves I (27) are uniformly formed on the check plate I (18) in an annular direction; a plurality of wedge grooves II (29) are uniformly formed on the check plate II (20) in an annular direction; wedge teeth I (19) and wedge blocks II (28) are slidably mounted on both ends of the U-shaped switching frame (22); the wedge teeth I (19) are snap-fitted with the wedge grooves I (27); the wedge blocks II (28) are snap-fitted with the wedge grooves II (29); and push springs II (33) are fixedly connected between the wedge teeth I (19) and the wedge blocks II (28) and the U-shaped switching frame (22).

7. The heat exchange well depth detection device for a ground source heat pump according to claim 1, characterized in that: The inflation assembly comprises an air pump (4) fixed on a support frame (1); an air outlet of the air pump (4) is connected to a valve (5); an air inlet pipe (6) is mounted on the valve (5); an air inlet pipe (6) connected to a flexible pipe (7) is mounted inside the rotating shaft (21) and the winding roller (3); a portion of the air inlet pipe (6) located inside the rotating shaft (21) is coaxially arranged with the rotating shaft (21); and the air inlet pipe (6) is connected to the air inlet pipe (6) via a rotating joint (24).

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