Heat exchange device used in shallow geothermal heat exchange system
By designing a preheater and a multi-module heat exchanger in the shallow geothermal exchange system, the problems of single heating and low efficiency are solved, realizing multi-form heating and efficient heat exchange, meeting the needs of domestic hot water supply, and improving the applicability and efficiency of the system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HEBEI XUHUI CONSTRUCTION ENGINEERING CO LTD
- Filing Date
- 2026-02-24
- Publication Date
- 2026-05-12
AI Technical Summary
Existing shallow geothermal exchange systems have limited heating options due to their single heat exchange device, which cannot meet the demand for hot water in winter. The buried pipes have low heat exchange efficiency, and the temperature of some shallow soil and rock masses is low with small temperature differences, resulting in limited geothermal exchange application capabilities.
Design a heat exchange device comprising a preheater, a hot water supply module, a heating module, and a hot air module. Improve the heat exchange capacity of buried pipes through return water preheating, staged heat exchange, and multi-form heating. Set up an adjustable heating module to connect each module to optimize heat energy utilization.
It enables multiple forms of heating, improves the heat exchange efficiency and temperature difference of buried pipes, meets the demand for domestic hot water supply, and enhances the applicability and heat exchange effect of the system.
Smart Images
Figure CN122015171A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of geothermal heat exchange technology, specifically to a heat exchange device for use in shallow geothermal exchange systems. Background Technology
[0002] Geothermal exchange systems are the core component of geothermal utilization. The core involves exchanging heat with soil, groundwater, or surface water through underground heat exchange devices. This, combined with equipment such as heat pumps, enables building heating, cooling, and hot water supply. The background technology covers its development history, working principles, system types, key technologies, and existing challenges. Shallow geothermal exchange systems are one type of geothermal exchange system development and utilization technology. Specifically, they refer to systems that utilize the low-grade heat energy of shallow soil, groundwater, and surface water within 200 meters below the surface, with temperatures typically between 10–25℃. This heat is then combined with heat exchange devices and heat pump units to achieve building heating, cooling, and domestic hot water supply.
[0003] Existing shallow geothermal exchange systems typically absorb shallow geothermal energy through buried pipes, then use compressors to compress and increase the temperature and heat source quality, thereby exchanging heat with underfloor heating systems and raising the temperature of the working medium to the required heating level. However, these heat exchange devices offer only one heating method, generally only providing heat to underfloor heating systems and failing to meet the demand for hot water in winter. Residents still need to use other heating devices to boil water. Furthermore, the temperature of some shallow soil and rock layers is low, resulting in a small temperature difference between the soil and the return water from the heat exchange device, leading to low heat exchange efficiency of the buried pipes and limited geothermal exchange application capabilities. Summary of the Invention
[0004] The technical problem to be solved by the present invention is to provide a heat exchange device for a shallow geothermal exchange system, which is equipped with a preheater to preheat the water supply to the buried pipe through the return water, thereby reducing the working pressure of the compressor and lowering the return water temperature, thereby improving the heat exchange capacity of the buried pipe. It is also equipped with a hot water supply module, a heating module and a hot air module to perform graded heat exchange and multi-form heating.
[0005] To solve the above-mentioned technical problems, the technical solution provided by the present invention is as follows: A heat exchange device for a shallow geothermal exchange system includes a heat exchanger, which contains a heating chamber, a warming chamber, and a hot air chamber, and a preheating chamber on one side. The heating chamber is equipped with a hot water supply module, the heating chamber is equipped with a heating module, the hot air chamber is equipped with a hot air module, the preheating chamber is equipped with a preheating module, and the top of the heat exchanger is equipped with an adjustable heating module. The regulating heating module includes a first heating pipe, a second heating pipe, a third heating pipe, and a preheating pipe. The hot water supply module, the heating module, the hot air module, and the preheating module are connected to each other through the regulating heating module.
[0006] Furthermore, the hot water supply module includes a heating heat exchanger and an insulated water tank. The heating heat exchanger is located above the insulated water tank and its top is connected to the regulating heating module. Its bottom is connected to the top of the insulated water tank through a connecting pipe. A water supply pipe is provided on one side of the heating heat exchanger, and a hot water pipe is provided on one side of the insulated water tank. Cold water is sent to the heating heat exchanger through the water supply pipe, and after heat exchange, it enters the insulated water tank through the connecting pipe for storage and is discharged through the hot water pipe.
[0007] Furthermore, one end of the first heating pipe is connected to the heat input end of the heat exchanger, and the other end is connected to the output end of the compressor, while the heat output end of the heat exchanger is connected to the second heating pipe.
[0008] Furthermore, a first-stage bypass pipe is provided between the first heating pipe and the second heating pipe, and a first heating valve is provided on the first-stage bypass pipe, and a first-stage bypass valve is provided on the first-stage bypass pipe.
[0009] Furthermore, it also includes a recovery heating component, including a return water pump installed between the heating heat exchanger and the insulated water tank. The return water pump has a pumping pipe at its input end and a water supply pipe at its output end. The other end of the pumping pipe is connected to the bottom of the insulated water tank, and the other end of the water supply pipe is connected to the bottom of the heating heat exchanger.
[0010] Furthermore, the bottom of the insulated water tank is provided with a stirring assembly, including a stirring rod erected in the insulated water tank, a stirring blade on the stirring rod, and a driven turntable at the bottom. The driven turntable is rotatably mounted on the bottom wall of the insulated water tank. A stirring motor is provided below the insulated water tank, and an active turntable magnetically coupled to the driven turntable is provided on the drive shaft of the stirring motor.
[0011] Furthermore, the heating module includes a heating heat exchanger, the heat input end of which is connected to the second heating pipe, and the heat output end of which is connected to the third heating pipe. A secondary bypass pipe is provided between the second heating pipe and the third heating pipe, a secondary bypass valve is provided on the secondary bypass pipe, and a second heating valve is provided on the second heating pipe.
[0012] Furthermore, the hot air module includes a heat exchange coil vertically installed in the hot air chamber, a horizontally arranged air guide baffle in the hot air chamber, a filter vertically arranged between the air guide baffle and the bottom of the hot air chamber, an exhaust fan installed at the top of the hot air chamber, an air inlet window on one side corresponding to the filter, and an air distribution plate vertically arranged between the other side and the air guide baffle.
[0013] Furthermore, the input end of the heat exchange coil is connected to the third heating pipe, and the output end is connected to the preheating module through the preheating pipe. A three-stage bypass pipe is provided between the third heating pipe and the preheating pipe, and a three-stage bypass valve is provided on the three-stage bypass pipe. A third heating valve is provided on the third heating pipe.
[0014] The advantages of this invention compared to the prior art are: 1. This invention is equipped with a preheating module, which can preheat the water supply to the underground pipe by controlling the return water temperature. This reduces the working pressure of the compressor and further lowers the return water temperature, making the temperature even lower after the return water enters the underground pipe under reduced pressure. This increases the temperature difference between the return water in the underground pipe and the shallow geothermal environment, thereby increasing the heat exchange efficiency and total heat exchange, making it more convenient and efficient to use. 2. The present invention is equipped with a hot water supply module, a heating module and a hot air module, and the compressed high-temperature hot water is supplied and heat exchanged to each module in sequence. Through the heat energy quality and temperature requirements of the three, a gradient heating area is formed, realizing multi-level efficient heat exchange of high-temperature hot water, which is more convenient to use, and the heat energy quality loss during the heat exchange process is small, and the heat exchange effect is better. 3. This invention is equipped with a hot water supply module, a heating module, and a hot air module. The hot water supply module provides domestic hot water; the heating module provides hot water for underfloor heating and radiators; and the hot air module provides warm air, thus providing heating to users from multiple directions. The heating functions are more diverse and richer, and the use is more convenient. 4. This invention is equipped with a preheating module, which can preheat the water supply of the buried pipe, increase the temperature of the water supply to the required temperature level, facilitate the compressor to compress and heat up, and is suitable for some shallow rock and soil bodies with lower temperature, thus having greater applicability. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 .
[0016] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 .
[0017] Figure 3 This is a schematic diagram of the internal structure of the present invention.
[0018] Figure 4 This is a schematic diagram of the structure of the heating adjustment module of the present invention.
[0019] Figure 5 This is a schematic diagram of the preheating module of the present invention.
[0020] Figure 6 This is a schematic diagram of the hot water supply module of the present invention.
[0021] Figure 7 This is a cross-sectional schematic diagram of the insulated water tank of the present invention.
[0022] Figure 8 This is a schematic diagram of the hot air module of the present invention.
[0023] As shown in the figure: 1. Heat exchanger; 11. Heating chamber; 12. Heating room; 13. Hot air chamber; 131. Air guide baffle; 132. Air collection pipe; 14. Inspection door; 2. Preheating chamber; 3. Hot water supply module; 31. Heating heat exchanger; 32. Insulated water tank; 33. Recovering heating component; 331. Return water pump; 332. Water extraction pipe; 333. Water supply pipe; 34. Stirring component; 341. Stirring motor; 342. Active turntable; 343. Driven turntable; 344. Stirring rod; 345. Stirring blade; 35. Connecting pipe; 36. Water supply pipe; 37. Hot water pipe; 4. Heating module; 41. Heating heat exchanger; 42. Heating inlet pipe. 43. Heating outlet pipe; 5. Hot air module; 51. Heat exchange coil; 52. Air inlet window; 53. Filter; 54. Air distribution plate; 55. Exhaust fan; 6. Preheating module; 61. Preheater; 62. Buried heat exchange pipe; 63. Warm water pipe; 7. Regulating heating module; 71. First heating pipe; 711. First heating valve; 72. Second heating pipe; 721. Second heating valve; 73. Third heating pipe; 731. Third heating valve; 74. Preheating pipe; 75. Return pipe; 76. First-stage bypass pipe; 761. First-stage bypass valve; 77. Second-stage bypass pipe; 771. Second-stage bypass valve; 78. Third-stage bypass pipe; 781. Third-stage bypass valve. Detailed Implementation
[0024] The present invention will now be described in further detail with reference to the accompanying drawings.
[0025] Combined with appendix Figure 1 Appendix Figure 2 Appendix Figure 3 As shown, a heat exchange device for a shallow geothermal exchange system includes a heat exchanger 1. Within the heat exchanger 1, a heating chamber 11, a heating chamber 12, and a hot air chamber 13 are arranged sequentially from back to front. A preheating chamber 2 is located at the rear. The heating chamber 11 contains a hot water supply module 3 connected to a water system. The heating chamber 12 contains a heating module 4 (including water for heating equipment such as radiators) connected to the underfloor heating system. The hot air chamber 13 contains a hot air module 5 connected to a ventilation system. The preheating chamber 2 contains a preheating module 6 and a hot water supply module. 3. The heating module 4, hot air module 5 and preheating module 6 are connected to each other through the regulating heating module 7 installed on the heat exchanger 1. The preheating module 6 is connected to the compressor and the underground pipe through the regulating heating module 7. A horizontal air guide baffle 131 is installed in the hot air chamber 13, and an air collection pipe 132 is installed at the front top. The rear side of the air guide baffle 131 is fitted with the side wall of the hot air chamber 13 with a gap (the hot air chamber 13 is divided into a U-shaped air duct by the air guide baffle 131). The heating chamber 11, heating chamber 12 and hot air chamber 13 are each equipped with an inspection door 14.
[0026] As described above, the buried pipes are arranged in a shallow geothermal environment and exchange heat with the surrounding environment through temperature difference, raising the internal water temperature to 10-15℃. The water is then transported to the preheating module 6 for preheating, where the water temperature rises to 25℃. After being pressurized by the compressor, the water temperature increases to 80-90℃. The water is then transported to the hot water supply module 3 via the regulating heating module 7, where heat exchange further increases the domestic water temperature, providing hot water for bathing, etc. After leaving the hot water supply module 3, the water temperature drops to 60-70℃ and is then transported to the heating module 4 via the regulating heating module 7, where it exchanges heat with the underfloor heating water, providing 55-65℃ of heat to the underfloor heating and other heating equipment, thus providing heating for the underfloor heating system. The equipment provides heating. After leaving the heating module 4, the water supply temperature drops to 40-50℃. It is then regulated by the heating module 7 and sent to the hot air module 5 for heat exchange with the indoor air supply, thus providing warm air of about 30℃ to the room. After leaving the hot air module 5, the water supply temperature drops to about 30℃. It is then regulated by the heating module 7 and sent to the preheating module 6 as a heat source to heat the unpressurized underground pipe water supply, raising the temperature of the underground pipe water supply. After its own temperature drops further, it is depressurized as return water and sent back to the underground pipe. After depressurization, the return water temperature drops to below -10℃ (antifreeze is added to the underground pipe water supply), thereby increasing the temperature difference with the shallow geothermal environment and improving the total heat exchange and heat exchange effect.
[0027] Combined with appendix Figure 3 Appendix Figure 4 Appendix Figure 5 Appendix Figure 6 As shown, the hot water supply module 3 includes a heating heat exchanger 31 and an insulated water tank 32. The heating heat exchanger 31 is located above the insulated water tank 32 and its top is connected to the regulating heating module 7. Its bottom is connected to the top of the insulated water tank 32 through a connecting pipe 35. A water supply pipe 36 is provided on one side of the heating heat exchanger 31, and a hot water pipe 37 is provided on one side of the insulated water tank 32. A heat recovery assembly 33 is provided between the heating heat exchanger 31 and the insulated water tank 32, and a stirring assembly 34 is provided at the bottom of the insulated water tank 32. Temperature sensors are respectively provided inside the insulated water tank 32, on the water supply pipe 36, the connecting pipe 35, and the hot water pipe 37 to measure the water temperature.
[0028] Combined with appendix Figure 4 Appendix Figure 6 As shown, the recovery heating component 33 includes a return water pump 331 installed on the top of the insulated water tank 32. The return water pump 331 has a water pumping pipe 332 at its input end and a water supply pipe 333 at its output end. The other end of the water pumping pipe 332 is connected to the bottom of the insulated water tank 32, and the other end of the water supply pipe 333 is connected to the bottom of the heating heat exchanger 31.
[0029] Combined with appendix Figure 5 Appendix Figure 7As shown, the stirring assembly 34 includes a stirring rod 344 erected in the insulated water tank 32, a stirring blade 345 on the stirring rod 344, and a driven turntable 343 at the bottom. The driven turntable 343 is rotatably mounted on the bottom wall of the insulated water tank 32. A stirring motor 341 is located below the insulated water tank 32, and an active turntable 342 magnetically coupled to the driven turntable 343 is mounted on the drive shaft of the stirring motor 341.
[0030] In the above description, the water system supplies cold water, which is then sent to the heat exchanger 31 via the water supply pipe 36. After heat exchange, the water temperature rises and enters the insulated water tank 32 via the connecting pipe 35 for storage. During this process, the stirring motor 341 starts, driving the stirring rod 344 to rotate, and the stirring blade 345 stirs the hot water in the insulated water tank 32 to prevent the hot water in the insulated water tank 32 from stratifying and causing uneven temperature, thus improving the accuracy of temperature detection. The temperature of the hot water in the insulated water tank 32 is controlled within a certain range by setting the system. When there is sufficient hot water in the insulated water tank 32, the water supply pipe 36 stops supplying water, reducing the need for adjustment. When the heat exchange pressure of the heating module 7 is reduced and hot water is needed, the hot water in the insulated water tank 32 is discharged through the hot water pipe 37 to supply hot water, and the water supply pipe 36 starts to supply water to replenish the hot water in the insulated water tank 32. When the temperature of the hot water in the insulated water tank 32 is insufficient, the return water pump 331 is turned on to draw out the water in the insulated water tank 32 and send it to the heating heat exchanger 31 for heat exchange. After heating, the hot water re-enters the insulated water tank 32 through the connecting pipe 35 and mixes with the hot water in the insulated water tank 32 through the stirring component 34, so that the temperature of the hot water in the insulated water tank 32 is controlled within a certain range.
[0031] Combined with appendix Figure 4 Appendix Figure 5 As shown, the heating module 4 includes a heating heat exchanger 41, which is equipped with a heating inlet pipe 42 and a heating outlet pipe 43, and is connected to the heating water system through the heating inlet pipe 42 and the heating outlet pipe 43.
[0032] As described above, water for heating equipment such as underfloor heating is sent into the heating heat exchanger 41 through the heating inlet pipe 42. After heat exchange and temperature increase, the water leaves through the heating outlet pipe 43, thus providing heat for the underfloor heating equipment.
[0033] Combined with appendix Figure 3 Appendix Figure 8 As shown, the hot air module 5 includes a heat exchange coil 51 erected in the hot air chamber 13, a filter 53 erected between the air guide baffle 131 and the bottom of the hot air chamber 13, and an exhaust fan 55 installed in the air collection pipe 132. An air inlet window 52 is provided on the front side of the hot air chamber 13 corresponding to the filter 53, and an air distribution plate 54 is erected on the rear side between the air guide baffle 131 and the air distribution plate 54.
[0034] As described above, after the exhaust fan 55 is turned on, cold air enters the hot air chamber 13 through the air inlet 52 and is filtered by the filter 53 to remove dust (reducing dust collection in the heat exchange coil 51 and improving heat exchange efficiency). It then exchanges heat through the heat exchange coil 51 to form hot air. After the airflow is stabilized by the air distribution plate 54, it exchanges heat again through the heat exchange coil 51 and is collected by the air collection pipe 132 before being sent into the room by the exhaust fan 55 to supply warm air.
[0035] Combined with appendix Figure 3 Appendix Figure 5 As shown, the preheating module 6 includes a preheater 61, on which a buried heat exchange pipe 62 and a warm water pipe 63 are provided. The other end of the buried heat exchange pipe 62 is connected to the output end of the buried pipe, and the other end of the warm water pipe 63 is connected to the input end of the compressor.
[0036] As described above, the water supplied in the buried pipe is sent to the preheating module 6 through the buried heat exchange pipe 62 for preheating, and then sent to the compressor through the warm water pipe 63 for pressurization, thereby reducing the compressor's working pressure.
[0037] Combined with appendix Figure 3 Appendix Figure 4 As shown, the regulating heating module 7 includes a first heating pipe 71, a second heating pipe 72, a third heating pipe 73, a preheating pipe 74, and a return pipe 75. One end of the first heating pipe 71 is connected to the compressor output, and the other end is connected to the input of the heating heat exchanger 31. One end of the second heating pipe 72 is connected to the output of the heating heat exchanger 31, and the other end is connected to the top input of the heating heat exchanger 41. One end of the third heating pipe 73 is connected to the top output of the heating heat exchanger 41, and the other end is connected to the input of the heat exchange coil 51. One end of the preheating pipe 74 is connected to the output of the heat exchange coil 51, and the other end is connected to the top input of the preheater 61. One end of the return pipe 75 is connected to the top output of the preheater 61, and the other end is connected to the underground pipe manifold. A bypass pipe 76 is provided with... The system includes a first heating valve 711, a second heating valve 721 on the second heating pipe 72, a third heating valve 731 on the third heating pipe 73, a primary bypass pipe 76 between the first heating pipe 71 and the second heating pipe 72, a secondary bypass pipe 77 between the second heating pipe 72 and the third heating pipe 73, and a tertiary bypass pipe 78 between the third heating pipe 73 and the preheating pipe 74. The primary bypass pipe 76 is equipped with a primary bypass valve 761 that controls the first heating valve 711 in the reverse direction, the secondary bypass pipe 77 is equipped with a secondary bypass valve 771 that controls the second heating valve 721 in the reverse direction, and the tertiary bypass pipe 78 is equipped with a tertiary bypass valve 781 that controls the third heating valve 731 in the reverse direction. Temperature sensors are installed on each pipe.
[0038] In the above description, after being pressurized by the compressor, the hot water flows into the heating heat exchanger 31 through the first heating pipe 71 for heat exchange, and then flows into the heating heat exchanger 41 through the second heating pipe 72 for heat exchange, and then flows into the heat exchange coil 51 through the third heating pipe 73 for heat exchange with the air, and then flows to the preheater 61 through the preheating pipe 74 for heat exchange with the water supplied in the buried pipe, and finally returns to the buried pipe through the return pipe 75 for heat exchange with the shallow geothermal environment; during the process, when the heat demand of the heating heat exchanger 31 is low (the hot water in the insulated water tank 32 is sufficient), the opening degree of the first heating valve 711 decreases or closes, and the opening degree of the first-stage bypass valve 761 increases, so that some hot water directly enters the second heating pipe 72 through the first-stage bypass pipe 76. Inside, the heating heat exchanger 41 is heated; and when the underfloor heating stops or the temperature is lowered, the heating heat exchanger 41 requires less heat, the opening of the second heating valve 721 decreases or closes, and the opening of the secondary bypass valve 771 increases, so that some hot water flows directly into the third heating pipe 73 through the secondary bypass pipe 77 to heat the hot air module 5; after the hot air module 5 stops or reduces its air supply, the demand for heat decreases, so the opening of the third heating valve 731 decreases or closes, and the opening of the tertiary bypass valve 781 increases, so that some hot water flows directly into the preheating pipe 74 through the tertiary bypass pipe 78. At the same time, the total flow rate is controlled by the return water temperature of the preheating pipe 74. Each valve is an electric valve whose opening is controlled by a corresponding temperature sensor.
[0039] In specific implementations of this invention, the contents not described in detail in this specification are existing technologies known to those skilled in the art.
[0040] The working principle of this invention: The buried pipe is arranged in a relatively constant shallow geothermal environment, and exchanges heat with the surrounding environment through temperature difference, raising the internal water temperature to 10-15℃. The water is then transported to the preheating module 6 for preheating, where the water temperature rises to 25℃. After being pressurized by the compressor, the water temperature is raised to 80-90℃. The water is then transported to the hot water supply module 3 via the heating module 7, where heat exchange further increases the domestic water temperature, providing hot water for bathing, etc. After leaving the hot water supply module 3, the water temperature drops to 60-70℃. The water is then transported to the heating module 4 via the heating module 7, where it exchanges heat with the underfloor heating water, providing 55-65℃ of heat to the underfloor heating system for heating. After leaving the heating module 4, the water temperature drops to 40-50℃. Furthermore, by adjusting the heating module 7, the hot air is delivered to the hot air module 5 for heat exchange with the indoor air supply, thereby providing warm air of about 30°C to the room. After leaving the hot air module 5, the water supply temperature drops to about 30°C and is then delivered to the preheating module 6 as a heat source to heat the unpressurized underground pipe water supply, increasing the temperature of the underground pipe water supply. After its own temperature further decreases, it is depressurized as return water and delivered back to the underground pipe. After depressurization, the return water temperature drops to below -10°C (antifreeze is added to the underground pipe water supply), thereby increasing the temperature difference with the shallow geothermal environment, improving the total heat exchange and heat exchange effect. At the same time, by adjusting the heating module 7, the hot water distribution and flow direction are controlled to achieve multi-stage heat exchange. Through hot water supply, underfloor heating equipment heating, and warm air supply, multiple forms of heating are achieved to improve comfort.
[0041] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.
[0042] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.
Claims
1. A heat exchange device for a shallow geothermal exchange system, comprising a heat exchanger (1), wherein the heat exchanger (1) is provided with a heating chamber (11), a heating chamber (12) and a hot air chamber (13), and a preheating chamber (2) is provided on one side, characterized in that: The heating chamber (11) is equipped with a hot water supply module (3), the heating chamber (12) is equipped with a heating module (4), the hot air chamber (13) is equipped with a hot air module (5), the preheating chamber (2) is equipped with a preheating module (6), and the heat exchanger (1) is equipped with an adjustable heating module (7). The regulating heating module (7) includes a first heating pipe (71), a second heating pipe (72), a third heating pipe (73) and a preheating pipe (74). The hot water supply module (3), the heating module (4), the hot air module (5) and the preheating module (6) are connected to each other through the regulating heating module (7).
2. A heat exchange device for a shallow geothermal exchange system according to claim 1, characterized in that: The hot water supply module (3) includes a heating heat exchanger (31) and an insulated water tank (32). The heating heat exchanger (31) is located above the insulated water tank (32) and its top is connected to the regulating heating module (7). Its bottom is connected to the top of the insulated water tank (32) through a connecting pipe (35). A water supply pipe (36) is provided on one side of the heating heat exchanger (31), and a hot water pipe (37) is provided on one side of the insulated water tank (32). Cold water is sent to the heating heat exchanger (31) through the water supply pipe (36) for heat exchange, and then enters the insulated water tank (32) through the connecting pipe (35) for storage, and is discharged through the hot water pipe (37).
3. A heat exchange device for a shallow geothermal exchange system according to claim 2, characterized in that: One end of the first heating pipe (71) is connected to the heat input end of the heating heat exchanger (31), and the other end is connected to the output end of the compressor. The heat output end of the heating heat exchanger (31) is connected to the second heating pipe (72).
4. A heat exchange device for a shallow geothermal exchange system according to claim 3, characterized in that: A first-stage bypass pipe (76) is provided between the first heating pipe (71) and the second heating pipe (72), and a first heating valve (711) is provided on the first-stage bypass pipe (76), and a first-stage bypass valve (761) is provided on the first-stage bypass pipe (76).
5. A heat exchange device for a shallow geothermal exchange system according to claim 2, characterized in that: It also includes a recovery heating component (33), including a return water pump (331) set between the heating heat exchanger (31) and the insulated water tank (32). The return water pump (331) has a water pump pipe (332) at its input end and a water supply pipe (333) at its output end. The other end of the water pump pipe (332) is connected to the bottom of the insulated water tank (32), and the other end of the water supply pipe (333) is connected to the bottom of the heating heat exchanger (31).
6. A heat exchange device for a shallow geothermal exchange system according to claim 2, characterized in that: The bottom of the insulated water tank (32) is provided with a stirring assembly (34), including a stirring rod (344) erected in the insulated water tank (32), a stirring blade (345) on the stirring rod (344), and a driven turntable (343) at the bottom. The driven turntable (343) is rotatably mounted on the bottom wall of the insulated water tank (32). A stirring motor (341) is provided below the insulated water tank (32), and an active turntable (342) magnetically coupled to the driven turntable (343) is provided on the drive shaft of the stirring motor (341).
7. A heat exchange device for a shallow geothermal exchange system according to claim 1, characterized in that: The heating module (4) includes a heating heat exchanger (41), the heat input end of the heating heat exchanger (41) is connected to the second heating pipe (72), the heat output end is connected to the third heating pipe (73), and a secondary bypass pipe (77) is provided between the second heating pipe (72) and the third heating pipe (73). A secondary bypass valve (771) is provided on the secondary bypass pipe (77), and a second heating valve (721) is provided on the second heating pipe (72).
8. A heat exchange device for a shallow geothermal exchange system according to claim 1, characterized in that: The hot air module (5) includes a heat exchange coil (51) erected in the hot air chamber (13), a horizontal air guide baffle (131) in the hot air chamber (13), a filter (53) erected between the air guide baffle (131) and the bottom of the hot air chamber (13), an exhaust fan (55) at the top of the hot air chamber (13), an air inlet window (52) on one side corresponding to the filter (53), and an air distribution plate (54) erected between the other side and the air guide baffle (131).
9. A heat exchange device for a shallow geothermal exchange system according to claim 8, characterized in that: The input end of the heat exchange coil (51) is connected to the third heating pipe (73), and the output end is connected to the preheating module (6) through the preheating pipe (74). A three-stage bypass pipe (78) is provided between the third heating pipe (73) and the preheating pipe (74), and a three-stage bypass valve (781) is provided on the three-stage bypass pipe (78). A third heating valve (731) is provided on the third heating pipe (73).