Buried pipe ground source heat pump system arranged in rectangular array mode

Abstract

The utility model discloses a buried pipe ground source heat pump system arranged in a rectangular array mode, belongs to the field of common building structures, and solves the problem that a heat exchange vertical shaft of an existing buried pipe ground source heat pump system arranged in the rectangular array mode is prone to functional failure. A heat exchange water input end at the top end of the U-shaped buried heat exchange pipe in each hot well is communicated with one end of a respective ground heat exchange water input pipe, and the other end of the respective ground heat exchange water input pipe is communicated with an output end of a circulating water pump (5); heat exchange water output ends at the top ends of the U-shaped buried heat exchange pipes in the hot wells are communicated with respective ground heat exchange water output pipes, and the other ends of the respective ground heat exchange water output pipes are communicated with an input end of a circulating water pump (5); the sum of the length of the ground heat exchange water input pipe connected to the U-shaped buried heat exchange pipe in each hot well and the length of the ground heat exchange water output pipe connected to the U-shaped buried heat exchange pipe in each hot well is equal.

Description

Technical Field

[0001] This utility model relates to a heat pump system, and more particularly to a ground source heat pump system with buried pipes arranged in a rectangular array to achieve balanced heat exchange. Background Technology

[0002] Geothermal resources are a renewable and clean energy source, a thermal energy resource generated from nuclear fission within the Earth. Geothermal is an important non-carbon-based renewable resource with advantages such as local availability, stability and reliability, green and low-carbon characteristics, and economic viability. my country's geothermal resources account for approximately one-sixth of the global total. How to develop geothermal resources and actively build a clean, low-carbon, safe, and efficient geothermal energy utilization system is currently a hot topic. Geothermal resources mainly include shallow geothermal energy, hydrothermal geothermal energy, and hot dry rock geothermal energy. Shallow geothermal energy refers to thermal energy resources located at a certain depth (generally less than 200 meters) below the Earth's surface in soil, rocks, and groundwater, with temperatures below 25℃ (this varies by region). This thermal energy mainly originates from solar radiation and the Earth's gradient warming. The development of shallow geothermal energy primarily utilizes buried pipe ground source heat pump systems. First, sampling wells are drilled on the pre-developed surface. After the geothermal samples pass the testing, array or annular wells are drilled. After the array or annular wells are completed, the... U-shaped buried heat exchange tube bundles are lowered into the drilled hot wells. The ends of the U-shaped buried heat exchange tubes exposed above ground are connected to the water distribution main pipe via fittings. One end of each U-shaped buried heat exchange tube is connected to the inlet water main pipe before heat exchange via fittings, and the other end of each U-shaped buried heat exchange tube is connected to the outlet water main pipe after heat exchange via fittings. The outer ends of the inlet water main pipe before heat exchange and the outer ends of the outlet water main pipe after heat exchange are respectively connected to the heat pump via circulating water pumps. Since the hot water wells are arranged in an array or ring on the ground... The varying distances between the outer ends of the U-shaped buried heat exchange pipes and the heat pump result in a higher circulation frequency of the heat exchange medium in the heat exchange shafts closer to the heat pump. This causes heat exchange overload in the heat exchange shafts closer to the heat pump, directly leading to functional failures such as shaft collapse, leakage, blockage, and cracks. This affects the operational safety of adjacent shafts, and in severe cases, the entire system may fail to achieve its heat exchange output effect, or even cause the entire heat exchange system to shut down. Summary of the Invention

[0003] This invention provides a ground source heat pump system with a rectangular array arrangement for achieving balanced heat exchange, which solves the technical problem that the heat exchange shafts of existing ground source heat pump systems with rectangular array arrangements are prone to functional failure.

[0004] This utility model solves the above technical problems through the following technical solution:

[0005] A rectangular array of buried pipe ground source heat pump systems includes heat wells, a circulating water pump, and a ground source heat pump arranged in a matrix array on the ground. Each heat well has a U-shaped buried heat exchange pipe. The circulating water pump and the ground source heat pump are located on the ground to the left of the array of heat wells. The ground source heat pump is connected to the circulating water pump. The hot water input end of the top of the U-shaped buried heat exchange pipe in each heat well is connected to one end of its respective ground hot water input pipe, and the other end of its respective ground hot water input pipe is connected to the output end of the circulating water pump. The hot water output end of the top of the U-shaped buried heat exchange pipe in each heat well is connected to its respective ground hot water output pipe, and the other end of its respective ground hot water output pipe is connected to the input end of the circulating water pump. The sum of the lengths of the ground hot water input pipes and the ground hot water output pipes connected to the U-shaped buried heat exchange pipes in each heat well is equal.

[0006] The top left corner of the matrix array of hot wells is designated as the top left hot well, the top right corner as the top right hot well, the bottom left corner as the bottom left hot well, and the bottom right corner as the bottom right hot well. A U-shaped buried heat exchange pipe is installed in the top left hot well. A fifth vertical forward ground heat exchange input pipe is connected to the top left hot water inlet of the U-shaped buried heat exchange pipe. The other end of the fifth vertical forward ground heat exchange input pipe is connected to one end of a fourth vertical left ground heat exchange input pipe, the other end of the fourth vertical left ground heat exchange input pipe is connected to one end of a third vertical backward ground heat exchange input pipe, the other end of the third vertical backward ground heat exchange input pipe is connected to a second horizontal right ground heat exchange input pipe, and the other end of the second horizontal right ground heat exchange input pipe is connected to a first vertical forward ground heat exchange input pipe. The other end of the pipe is connected to the outlet of the circulating water pump; at the upper left hot water outlet of the upper left U-shaped buried heat exchange pipe, a sixth vertical backward ground heat exchange output pipe is connected, the other end of the sixth vertical backward ground heat exchange output pipe is connected to the seventh horizontal left ground heat exchange output pipe, the other end of the seventh horizontal left ground heat exchange output pipe is connected to the eighth vertical forward ground heat exchange output pipe, and the other end of the eighth vertical forward ground heat exchange output pipe is connected to the inlet of the circulating water pump; the eighth vertical forward ground heat exchange output pipe, the first vertical forward ground heat exchange input pipe, the second horizontal right ground heat exchange input pipe, the third vertical backward ground heat exchange input pipe, the fourth vertical left ground heat exchange input pipe and the seventh horizontal left ground heat exchange output pipe form a rectangular pipeline for circulating hot water in the upper left heat well, and the length of the fifth vertical forward ground heat exchange input pipe is equal to the length of the sixth vertical backward ground heat exchange output pipe.

[0007] A U-shaped buried heat exchange pipe is installed in the lower right hot well. An eleventh vertical backward hot water inlet pipe is connected to the lower right hot water inlet of the U-shaped buried heat exchange pipe. The other end of the eleventh vertical backward hot water inlet pipe is connected to a tenth horizontal right-facing hot water inlet pipe. The other end of the tenth horizontal right-facing hot water inlet pipe is connected to a ninth vertical forward hot water inlet pipe, and the other end of the ninth vertical forward hot water inlet pipe is connected to the outlet of the circulating water pump. A twelfth vertical forward hot water outlet pipe is connected to the lower right hot water outlet of the U-shaped buried heat exchange pipe. The other end of the twelfth vertical forward hot water outlet pipe is connected to a thirteenth horizontal right-facing hot water outlet pipe, and the other end of the thirteenth horizontal right-facing hot water outlet pipe is connected to a fourteenth vertical... The rear hot water output pipe is connected, and the other end of the fourteenth vertical rear hot water output pipe is connected to the fifteenth horizontal left hot water output pipe. The other end of the fifteenth horizontal left hot water output pipe is connected to the sixteenth vertical forward hot water output pipe. The other end of the sixteenth vertical forward hot water output pipe is connected to the inlet of the circulating water pump. The sixteenth vertical forward hot water output pipe, the ninth vertical forward hot water input pipe, the tenth horizontal right hot water input pipe, the thirteenth horizontal right hot water output pipe, the fourteenth vertical rear hot water output pipe, and the fifteenth horizontal left hot water output pipe form a rectangular pipeline for the surface hot water circulation and transportation of the lower right hot well. The length of the eleventh vertical rear hot water input pipe is equal to the length of the twelfth vertical forward hot water output pipe.

[0008] The geothermal wells of this invention are arranged in a rectangular array with adjacent wells spaced at equal intervals to ensure verticality. The intervals between wells should not be too small, otherwise the geothermal heat exchange effect will be affected. The U-shaped buried heat exchange pipes are made of PE pipes and buried vertically. After the surface hot water delivery pipe is connected to the U-shaped buried heat exchange pipes with U-shaped joints, a pressure test is performed on the connected U-shaped buried heat exchange pipes before they are lowered into the wells. After they are lowered into the wells, a pressure test is performed again to check the airtightness of the buried pipes, further preventing pipe rupture or leakage that could cause hydraulic imbalance and affect heat exchange performance. The U-shaped buried heat exchange pipes are connected in parallel to ensure that the heat transfer of each pipeline does not interfere with each other and is easy to control. The parallel connection of the U-shaped buried heat exchange pipes can improve the risk of thermal short circuits or reduce their impact compared to the series connection. It overcomes the defect of heat exchange overload in some heat exchange wells. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model;

[0010] Figure 2 This is a schematic diagram of the structure of the U-shaped buried heat exchanger pipe 7 of this utility model;

[0011] Figure 3 This is a schematic diagram of the structure of the U-shaped buried heat exchange pipe 7 of this utility model from a top view.

[0012] Figure 4 This is a ground layout diagram of the thermal wells arranged in a matrix array according to this utility model. Detailed Implementation

[0013] The present invention will now be described in detail with reference to the accompanying drawings:

[0014] A rectangular array of buried pipe ground source heat pump systems includes heat wells, a circulating water pump 5, and a ground source heat pump 6 arranged in a matrix array on the ground. Each heat well has a U-shaped buried heat exchange pipe. The circulating water pump 5 and the ground source heat pump 6 are located on the ground to the left of the array of heat wells. The ground source heat pump 6 is connected to the circulating water pump 5. The hot water inlet at the top of the U-shaped buried heat exchange pipe in each heat well is connected to one end of its respective ground hot water inlet pipe, and the other end of its respective ground hot water inlet pipe is connected to the output end of the circulating water pump 5. The hot water outlet at the top of the U-shaped buried heat exchange pipe in each heat well is connected to its respective ground hot water outlet pipe. The other end of each surface hot water outlet pipe is connected to the input end of the circulating water pump 5; the sum of the length of the surface hot water inlet pipe connected to the U-shaped buried heat exchange pipe in each hot well and the length of the surface hot water outlet pipe is equal; for each hot well arranged in a matrix array, the sum of the length of the hot water inlet pipe connected to the output end of the circulating water pump 5 and the length of the hot water outlet pipe connected from the hot well to the input end of the circulating water pump 5 is equal, ensuring that the circulation frequency of the hot water in the U-shaped buried heat exchange pipe in each hot well and the shallow geothermal water 8 in the well is the same, avoiding overload of the heat exchange of the hot wells close to the circulating water pump 5.

[0015] The upper left corner of the matrix array of heat wells is designated as upper left heat well 1, the upper right corner as upper right heat well 2, the lower left corner as lower left heat well 3, and the lower right corner as lower right heat well 4. An upper left U-shaped buried heat exchange pipe 7 is installed in upper left heat well 1. A fifth vertical forward ground heat exchange input pipe 16 is connected to the upper left hot water inlet 10 of the upper left U-shaped buried heat exchange pipe 7. The other end of pipe 6 is connected to one end of the fourth vertical left-facing ground heat exchange input pipe 15. The other end of the fourth vertical left-facing ground heat exchange input pipe 15 is connected to one end of the third vertical rearward ground heat exchange input pipe 14. The other end of the third vertical rearward ground heat exchange input pipe 14 is connected to the second horizontal right-facing ground heat exchange input pipe 13. The other end of the second horizontal right-facing ground heat exchange input pipe 13 is connected to the first vertical forward-facing ground heat exchange input pipe 12. The other end of the first vertical forward-facing ground heat exchange input pipe 12 is connected to the outlet 21 of the circulating water pump 5. On the upper left hot water outlet 11 of the upper left U-shaped buried heat exchange pipe 7, a sixth vertical rearward ground heat exchange output pipe 17 is connected. The other end of the sixth vertical rearward ground heat exchange output pipe 17 is connected to the seventh horizontal left-facing ground heat exchange output pipe 18. The other end of the seventh horizontal left-facing ground heat exchange output pipe 18 is connected to the eighth vertical forward-facing ground heat exchange output pipe 19. The other end of the eighth vertical forward-facing ground heat exchange output pipe 19 is connected to the inlet of the circulating water pump 5. Water inlet 20 is connected; the eighth vertical forward ground heat exchange output pipe 19, the first vertical forward ground heat exchange input pipe 12, the second horizontal right ground heat exchange input pipe 13, the third vertical backward ground heat exchange input pipe 14, the fourth vertical left ground heat exchange input pipe 15 and the seventh horizontal left ground heat exchange output pipe 18 form a rectangular pipeline for circulating hot water in the upper left heat well; the length of the fifth vertical forward ground heat exchange input pipe 16 is equal to the length of the sixth vertical backward ground heat exchange output pipe 17.

[0016] A U-shaped buried heat exchange pipe 25 is installed in the lower right hot well 4. An eleventh vertical backward hot water inlet pipe 24 is connected to the lower right hot water inlet of the U-shaped buried heat exchange pipe 25. The other end of the eleventh vertical backward hot water inlet pipe 24 is connected to a tenth horizontal right-facing hot water inlet pipe 23. The other end of the tenth horizontal right-facing hot water inlet pipe 23 is connected to a ninth vertical forward hot water inlet pipe 22. The other end of the ninth vertical forward hot water inlet pipe 22 is connected to the outlet 21 of the circulating water pump 5. A twelfth vertical forward hot water outlet pipe 26 is connected to the lower right hot water outlet of the U-shaped buried heat exchange pipe 25. The other end of the twelfth vertical forward hot water outlet pipe 26 is connected to a thirteenth horizontal right-facing hot water outlet pipe 27. The other end of the thirteenth horizontal right-facing hot water outlet pipe 27 is connected to a fourteenth vertical... The rear hot water output pipe 28 is connected, and the other end of the fourteenth vertical rear hot water output pipe 28 is connected to the fifteenth horizontal left hot water output pipe 29. The other end of the fifteenth horizontal left hot water output pipe 29 is connected to the sixteenth vertical forward hot water output pipe 30. The other end of the sixteenth vertical forward hot water output pipe 30 is connected to the inlet 20 of the circulating water pump 5. The sixteenth vertical forward hot water output pipe 30, the ninth vertical forward hot water input pipe 22, the tenth horizontal right hot water input pipe 23, the thirteenth horizontal right hot water output pipe 27, the fourteenth vertical rear hot water output pipe 28, and the fifteenth horizontal left hot water output pipe 29 form a rectangular pipeline for circulating hot water on the ground of the lower right hot well. The length of the eleventh vertical rear hot water input pipe 24 is equal to the length of the twelfth vertical forward hot water output pipe 26.

[0017] A method for deploying a rectangular array of buried pipe ground source heat pump systems involves drilling heat wells in a matrix array on the ground. A circulating water pump 5 and a ground source heat pump 6 are installed on the ground to the left of the heat wells in the matrix array. The ground source heat pump 6 is connected to the circulating water pump 5. The upper left corner of the heat wells in the matrix array is designated as the upper left heat well 1, and the lower right corner is designated as the lower right heat well 4. The method is characterized by the following steps:

[0018] Step 1: Place the upper left U-shaped buried heat exchange pipe 7 in the upper left heat well 1, and place the lower right U-shaped buried heat exchange pipe 25 in the lower right heat well 4.

[0019] Step 2: Construct the following pipes separately: First vertical forward ground heat exchange input pipe 12, second horizontal right-facing ground heat exchange input pipe 13, third vertical backward ground heat exchange input pipe 14, fourth vertical left-facing ground heat exchange input pipe 15, fifth vertical forward ground heat exchange input pipe 16, sixth vertical backward ground heat exchange output pipe 17, seventh horizontal left-facing ground heat exchange output pipe 18, and eighth vertical forward ground heat exchange output pipe 19.

[0020] Step 3: Connect the fifth vertical forward ground heat exchanger pipe 16 to the upper left hot water inlet 10 of the upper left U-shaped buried heat exchanger pipe 7. The other end of the fifth vertical forward ground heat exchanger pipe 16 is connected to one end of the fourth vertical left ground heat exchanger pipe 15. The other end of the fourth vertical left ground heat exchanger pipe 15 is connected to one end of the third vertical backward ground heat exchanger pipe 14. The other end of the third vertical backward ground heat exchanger pipe 14 is connected to the second horizontal right ground heat exchanger pipe 13. The other end of the second horizontal right ground heat exchanger pipe 13 is connected to the first vertical forward ground heat exchanger pipe 12. The other end of the first vertical forward ground heat exchanger pipe 12 is connected to the outlet 21 of the circulating water pump 5. Connect the sixth vertical backward ground heat exchanger pipe 16 to the upper left hot water outlet 11 of the upper left U-shaped buried heat exchanger pipe 7. The heat output pipe 17, the other end of the sixth vertical backward ground heat exchange output pipe 17 is connected to the seventh horizontal left ground heat exchange output pipe 18, the other end of the seventh horizontal left ground heat exchange output pipe 18 is connected to the eighth vertical forward ground heat exchange output pipe 19, the other end of the eighth vertical forward ground heat exchange output pipe 19 is connected to the inlet 20 of the circulating water pump 5; the eighth vertical forward ground heat exchange output pipe 19, the first vertical forward ground heat exchange input pipe 12, the second horizontal right ground heat exchange input pipe 13, the third vertical backward ground heat exchange input pipe 14, the fourth vertical left ground heat exchange input pipe 15 and the seventh horizontal left ground heat exchange output pipe 18 form a rectangular pipeline for circulating hot water in the upper left heat well; the length of the fifth vertical forward ground heat exchange input pipe 16 is equal to the length of the sixth vertical backward ground heat exchange output pipe 17;

[0021] Step 4: Construct the following pipes separately: Ninth vertical forward hot water inlet pipe 22, Tenth horizontal rightward hot water inlet pipe 23, Eleventh vertical backward hot water inlet pipe 24, Twelfth vertical forward hot water outlet pipe 26, Thirteenth horizontal rightward hot water outlet pipe 27, Fourteenth vertical backward hot water outlet pipe 28, Fifteenth horizontal leftward hot water outlet pipe 29, and Sixteenth vertical forward hot water outlet pipe 30.

[0022] Step 5: Connect the eleventh vertical backward hot water inlet pipe 24 to the lower right hot water inlet of the lower right U-shaped buried heat exchange pipe 25. Connect the other end of the eleventh vertical backward hot water inlet pipe 24 to the tenth horizontal right hot water inlet pipe 23. The other end of the tenth horizontal right hot water inlet pipe 23 is connected to the ninth vertical forward hot water inlet pipe 22. The other end of the ninth vertical forward hot water inlet pipe 22 is connected to the outlet 21 of the circulating water pump 5. Connect the twelfth vertical forward hot water outlet pipe 26 to the lower right hot water outlet of the lower right U-shaped buried heat exchange pipe 25. Connect the other end of the twelfth vertical forward hot water outlet pipe 26 to the thirteenth horizontal right hot water outlet pipe 27. The other end of the thirteenth horizontal right hot water outlet pipe 27 is connected to the fourteenth vertical backward hot water outlet pipe 28. The other end of the fourteenth vertical backward hot water outlet pipe 28 is connected to the tenth vertical backward hot water outlet pipe 23. The fifth horizontal left-facing hot water output pipe 29 is connected to the sixth horizontal left-facing hot water output pipe 29. The other end of the sixth horizontal forward-facing hot water output pipe 30 is connected to the inlet 20 of the circulating water pump 5. The sixth vertical forward-facing hot water output pipe 30, the ninth vertical forward-facing hot water input pipe 22, the tenth horizontal right-facing hot water input pipe 23, the thirteenth horizontal right-facing hot water output pipe 27, the fourteenth vertical backward-facing hot water output pipe 28, and the fifteenth horizontal left-facing hot water output pipe 29 form the rectangular pipeline for circulating hot water on the ground of the lower right hot well. The rectangular pipeline for circulating hot water on the ground of the lower right hot well is aligned vertically with the rectangular pipeline for circulating hot water on the ground of the upper left hot well. The length of the eleventh vertical backward-facing hot water input pipe 24 is equal to the length of the twelfth vertical forward-facing hot water output pipe 26.

[0023] The arrangement of the input and output pipelines for the hot water exchange connected to the lower left hot well 3, and the arrangement of the input and output pipelines for the hot water exchange connected to the upper right hot well 2, are the same as the arrangement of the input and output pipelines for the upper left hot well 1 and the lower right hot well 4.

[0024] Shallow geothermal water 8 is installed in both the upper left hot well 1 and the lower right hot well 4. Hot water 9 circulates between the circulating water pump 5 and the ground source heat pump 6. The hot water 9 is output from the ground source heat pump 6 and enters the circulating water pump 5. Then it enters the hot well through the hot water input pipeline for heat exchange. After heat exchange, the hot water enters the circulating water pump 5 through the hot water output pipeline and finally enters the ground source heat pump 6, thus completing the entire geothermal heat exchange cycle.

[0025] The hot water 9 flowing from the outlet 21 of the circulating water pump 5 passes sequentially through the first vertical forward ground heat exchange input pipe 12, the second horizontal right ground heat exchange input pipe 13, the third vertical backward ground heat exchange input pipe 14, the fourth vertical left ground heat exchange input pipe 15, the fifth vertical forward ground heat exchange input pipe 16, and the upper left hot water inlet 10, before entering the upper left U-shaped buried heat exchange pipe 7. There, it exchanges heat with the shallow geothermal water 8 in the upper left hot well 1. After the heat exchange, the hot water flows out from the upper left hot water outlet 11 and then sequentially passes through the sixth vertical backward ground heat exchange pipe... The heat exchange output pipe 17, the seventh horizontal left-facing ground heat exchange output pipe 18, and the eighth vertical forward-facing ground heat exchange output pipe 19 enter the inlet 20 of the circulating water pump 5, and then enter the ground source heat pump 6. Since the heat exchange circulation path length of each heat well arranged in a matrix array is basically equal, the heat exchange circulation frequency of each heat well is basically the same, which realizes the uniformity of geothermal heat exchange and avoids the high heat exchange circulation frequency of heat wells closer to the circulating water pump, which would lead to functional failure of the heat exchange shaft and phenomena such as shaft collapse, leakage, blockage, and cracks.

Claims

1. A ground source heat pump system with a rectangular array of buried pipes, comprising heat wells, a circulating water pump (5), and a ground source heat pump (6) arranged in a matrix array on the ground, wherein each heat well is provided with a U-shaped buried heat exchange pipe, the circulating water pump (5) and the ground source heat pump (6) are located on the ground to the left of the array of heat wells, and the ground source heat pump (6) is connected to the circulating water pump (5), characterized in that, The hot water input end of the U-shaped buried heat exchange pipe in each hot well is connected to one end of its respective ground hot water input pipe, and the other end of its respective ground hot water input pipe is connected to the output end of the circulating water pump (5); the hot water output end of the U-shaped buried heat exchange pipe in each hot well is connected to its respective ground hot water output pipe, and the other end of its respective ground hot water output pipe is connected to the input end of the circulating water pump (5); the sum of the length of the respective ground hot water input pipe connected to the U-shaped buried heat exchange pipe in each hot well and the length of its respective ground hot water output pipe are all equal.

2. The ground source heat pump system with a rectangular array arrangement of buried pipes according to claim 1, characterized in that, The upper left corner of the matrix array of hot wells is the upper left hot well (1), the upper right corner of the matrix array of hot wells is the upper right hot well (2), the lower left corner of the matrix array of hot wells is the lower left hot well (3), and the lower right corner of the matrix array of hot wells is the lower right hot well (4); an upper left U-shaped buried heat exchange pipe (7) is installed in the upper left hot well (1), and a fifth vertical forward ground heat exchange input pipe (16) is connected to the upper left hot water inlet (10) of the upper left U-shaped buried heat exchange pipe (7). 6) The other end is connected to one end of the fourth vertical left-facing ground heat exchange input pipe (15), the other end of the fourth vertical left-facing ground heat exchange input pipe (15) is connected to one end of the third vertical rearward ground heat exchange input pipe (14), the other end of the third vertical rearward ground heat exchange input pipe (14) is connected to the second horizontal right-facing ground heat exchange input pipe (13), the other end of the second horizontal right-facing ground heat exchange input pipe (13) is connected to the first vertical forward-facing ground heat exchange input pipe (12), and the other end of the first vertical forward-facing ground heat exchange input pipe (12) is connected to The outlet (21) of the circulating water pump (5) is connected; on the upper left hot water outlet (11) of the upper left U-shaped buried heat exchange pipe (7), a sixth vertical backward ground heat exchange output pipe (17) is connected, the other end of the sixth vertical backward ground heat exchange output pipe (17) is connected to the seventh horizontal left ground heat exchange output pipe (18), the other end of the seventh horizontal left ground heat exchange output pipe (18) is connected to the eighth vertical forward ground heat exchange output pipe (19), and the other end of the eighth vertical forward ground heat exchange output pipe (19) is connected to the outlet (21) of the circulating water pump (5). The inlet (20) is connected; the eighth vertical forward ground heat exchange output pipe (19), the first vertical forward ground heat exchange input pipe (12), the second horizontal right ground heat exchange input pipe (13), the third vertical backward ground heat exchange input pipe (14), the fourth vertical left ground heat exchange input pipe (15) and the seventh horizontal left ground heat exchange output pipe (18) form a rectangular pipeline for circulating hot water in the upper left heat well. The length of the fifth vertical forward ground heat exchange input pipe (16) is equal to the length of the sixth vertical backward ground heat exchange output pipe (17).

3. A ground source heat pump system with a rectangular array arrangement of buried pipes according to claim 2, characterized in that, A right-lower U-shaped buried heat exchange pipe (25) is installed in the right-lower hot well (4). An eleventh vertical backward heat exchange pipe (24) is connected to the right-lower hot water inlet of the right-lower U-shaped buried heat exchange pipe (25). The other end of the eleventh vertical backward heat exchange pipe (24) is connected to the tenth horizontal right-facing hot water inlet pipe (23). The other end of the tenth horizontal right-facing hot water inlet pipe (23) is connected to the ninth vertical forward heat exchange pipe (22). The other end of the ninth vertical forward heat exchange pipe (22) is connected to the outlet (21) of the circulating water pump (5). A twelfth vertical forward heat exchange pipe (26) is connected to the right-lower hot water outlet of the right-lower U-shaped buried heat exchange pipe (25). The other end of the twelfth vertical forward heat exchange pipe (26) is connected to the thirteenth horizontal right-facing hot water outlet pipe (27). The other end of the thirteenth horizontal right-facing hot water outlet pipe (27) is connected to the fourteenth vertical forward heat exchange pipe (28). The rear hot water output pipe (28) is connected, and the other end of the fourteenth vertical rear hot water output pipe (28) is connected to the fifteenth horizontal left hot water output pipe (29). The other end of the fifteenth horizontal left hot water output pipe (29) is connected to the sixteenth vertical forward hot water output pipe (30). The other end of the sixteenth vertical forward hot water output pipe (30) is connected to the inlet (20) of the circulating water pump (5). The sixteenth vertical forward hot water output pipe (30), the ninth vertical forward hot water input pipe (22), the tenth horizontal right hot water input pipe (23), the thirteenth horizontal right hot water output pipe (27), the fourteenth vertical rear hot water output pipe (28), and the fifteenth horizontal left hot water output pipe (29) form a rectangular pipeline for circulating hot water on the ground of the lower right hot well. The length of the eleventh vertical rear hot water input pipe (24) is equal to the length of the twelfth vertical forward hot water output pipe (26).

Images