Layout method of buried pipe ground source heat pump system arranged in rectangular array mode

Abstract

The invention discloses a layout method of 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 a 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] The present invention relates to a heat pump system, and particularly to a layout method of a buried-tube ground source heat pump system with a rectangular array layout for achieving balanced heat exchange. Background Art

[0002] Geothermal resources are a kind of renewable clean energy, which is a kind of heat energy resource generated by nuclear fission inside the earth; geothermal energy is an important non-carbon-based renewable resource, with the advantages of local resources, stable and reliable, green and low-carbon, and economically feasible; the geothermal resources in China account for about 1 / 6 of the total global resources. How to develop geothermal resources and actively build a clean, low-carbon, safe and efficient geothermal energy utilization system is a current hot topic; geothermal resources mainly include shallow geothermal energy, hydrothermal geothermal energy and hot dry rock geothermal energy. Among them, shallow geothermal energy refers to the heat energy resources stored in soil, rock and groundwater within a certain depth range (generally less than 200 meters) below the ground surface, with a temperature lower than 25 °C (varying in different regions). This kind of heat energy mainly comes from solar radiation and the geothermal gradient heating; the development of shallow geothermal energy mainly adopts a buried-tube ground source heat pump system. First, sampling wells are drilled on the pre-developed ground surface. After the geothermal sampling is qualified, array or circular heat wells are drilled. After the drilling of the array or circular heat wells is completed, U-shaped buried heat exchange tube bundles are lowered into the drilled heat wells. The ends of the U-shaped buried heat exchange tubes exposed on the ground are connected together with a distribution water main through connecting pipe fittings. One end of each U-shaped buried heat exchange tube is communicated with the water inlet main before heat exchange through a connecting pipe fitting, and the other end of each U-shaped buried heat exchange tube is communicated with the water outlet main after heat exchange through a connecting pipe fitting. The outer ends of the water inlet main before heat exchange and the water outlet main after heat exchange are respectively connected to a heat pump through a circulating water pump; since each hot water well is arranged in an array or circular shape on the ground, the distances between the outer ends of each U-shaped buried heat exchange tube and the heat pump are different, resulting in a higher circulation frequency of the heat exchange medium in the U-shaped buried heat exchange tubes in the heat exchange shafts closer to the heat pump, causing heat exchange overload in the heat exchange shafts closer to the heat pump, directly leading to functional failure of the heat exchange shafts, such as shaft collapse, water leakage, blockage, cracks, etc., affecting the operation safety of adjacent shafts. In serious cases, the entire system cannot reach the heat exchange output effect, and even the entire heat exchange system stops operating. Summary of the Invention

[0003] The present invention provides a layout method of a buried-tube ground source heat pump system with a rectangular array layout, which solves the technical problem that the heat exchange shafts of the existing buried-tube ground source heat pump system with a rectangular array layout are prone to functional failure.

[0004] The present invention solves the above technical problems through the following technical solutions: A ground-coupled heat pump system with a rectangular array arrangement, comprising heat wells, circulating water pumps and a ground-source heat pump arranged in a matrix array form on the ground. A U-shaped buried heat exchange pipe is provided in each heat well. The circulating water pump and the ground-source heat pump are arranged on the left ground of the heat wells arranged in an array. The ground-source heat pump is connected to the circulating water pump. The heat exchange water input ends at the tops of the U-shaped buried heat exchange pipes in each heat well are connected to one ends of their respective ground heat exchange water input pipes, and the other ends of their respective ground heat exchange water input pipes are connected to the output end of the circulating water pump; the heat exchange water output ends at the tops of the U-shaped buried heat exchange pipes in each heat well are connected to their respective ground heat exchange water output pipes, and the other ends of their respective ground heat exchange water output pipes are connected to the input end of the circulating water pump; the sum of the lengths of their respective ground heat exchange water input pipes and their respective ground heat exchange water output pipes connected to the U-shaped buried heat exchange pipes in each heat well is equal.

[0005] The upper left top corner of the heat wells arranged in a matrix array is the upper left heat well, the upper right top corner of the heat wells arranged in a matrix array is the upper right heat well, the lower left top corner of the heat wells arranged in a matrix array is the lower left heat well, and the lower right top corner of the heat wells arranged in a matrix array is the lower right heat well; an upper left U-shaped buried heat exchange pipe is provided in the upper left heat well. At the upper left heat exchange water input port of the upper left U-shaped buried heat exchange pipe, a fifth vertical forward ground heat exchange input pipe is connected. The other end of the fifth vertical forward ground heat exchange input pipe is connected to one end of a fourth vertical leftward ground heat exchange input pipe. The other end of the fourth vertical leftward 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 rightward ground heat exchange input pipe. The other end of the second horizontal rightward ground heat exchange input pipe is connected to a first vertical forward ground heat exchange input pipe. The other end of the first vertical forward ground heat exchange input pipe is connected to the water outlet of the circulating water pump; at the upper left heat exchange water output port 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 a seventh horizontal leftward ground heat exchange output pipe. The other end of the seventh horizontal leftward ground heat exchange output pipe is connected to an eighth vertical forward ground heat exchange output pipe. The other end of the eighth vertical forward ground heat exchange output pipe is connected to the water 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 rightward ground heat exchange input pipe, the third vertical backward ground heat exchange input pipe, the fourth vertical leftward ground heat exchange input pipe and the seventh horizontal leftward ground heat exchange output pipe form a rectangular pipeline for circulating and transporting the ground heat exchange water of 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.

[0006] In the lower right heat well, a lower right U-shaped buried heat exchange pipe is provided. A eleventh vertical backward heat exchange water input pipe is connected to the lower right heat exchange water input port of the lower right U-shaped buried heat exchange pipe. The other end of the eleventh vertical backward heat exchange water input pipe is connected to a tenth horizontal rightward heat exchange water input pipe. The other end of the tenth horizontal rightward heat exchange water input pipe communicates with a ninth vertical forward heat exchange water input pipe. The other end of the ninth vertical forward heat exchange water input pipe communicates with the water outlet of the circulation water pump; A twelfth vertical forward heat exchange water output pipe is connected to the lower right heat exchange water output port of the lower right U-shaped buried heat exchange pipe. The other end of the twelfth vertical forward heat exchange water output pipe communicates with a thirteenth horizontal rightward heat exchange water output pipe. The other end of the thirteenth horizontal rightward heat exchange water output pipe communicates with a fourteenth vertical backward heat exchange water output pipe. The other end of the fourteenth vertical backward heat exchange water output pipe communicates with a fifteenth horizontal leftward heat exchange water output pipe. The other end of the fifteenth horizontal leftward heat exchange water output pipe communicates with a sixteenth vertical forward heat exchange water output pipe. The other end of the sixteenth vertical forward heat exchange water output pipe communicates with the water inlet of the circulation water pump; The sixteenth vertical forward heat exchange water output pipe, the ninth vertical forward heat exchange water input pipe, the tenth horizontal rightward heat exchange water input pipe, the thirteenth horizontal rightward heat exchange water output pipe, the fourteenth vertical backward heat exchange water output pipe and the fifteenth horizontal leftward heat exchange water output pipe form a rectangular pipeline for circulating and transporting the ground heat exchange water of the lower right heat well. The length of the eleventh vertical backward heat exchange water input pipe is equal to the length of the twelfth vertical forward heat exchange water output pipe.

[0007] A laying method of a ground-source heat pump system with buried pipes arranged in a rectangular array. Heat wells are arranged and drilled in a matrix array form on the ground. A circulation water pump and a ground-source heat pump are arranged on the left side ground of the heat wells arranged in a matrix array. The ground-source heat pump is connected to the circulation water pump. The upper left top corner of the heat wells arranged in a matrix array is the upper left heat well, and the lower right top corner of the heat wells arranged in a matrix array is the lower right heat well; It is characterized by the following steps: Step 1: Arrange the upper left U-shaped buried heat exchange pipe in the upper left heat well, and arrange the lower right U-shaped buried heat exchange pipe in the lower right heat well; Step 2: Manufacture respectively: a first vertical forward ground heat exchange input pipe, a second horizontal rightward ground heat exchange input pipe, a third vertical backward ground heat exchange input pipe, a fourth vertical leftward ground heat exchange input pipe, a fifth vertical forward ground heat exchange input pipe, a sixth vertical backward ground heat exchange output pipe, a seventh horizontal leftward ground heat exchange output pipe, a seventh horizontal leftward ground heat exchange output pipe and an eighth vertical forward ground heat exchange output pipe; Step 3: Connect the fifth vertically forward ground heat exchange input pipe to the upper left heat exchange water input port of the upper left U-shaped buried heat exchange pipe. The other end of the fifth vertically forward ground heat exchange input pipe is connected to one end of the fourth vertically leftward ground heat exchange input pipe. The other end of the fourth vertically leftward ground heat exchange input pipe is connected to one end of the third vertically backward ground heat exchange input pipe. The other end of the third vertically backward ground heat exchange input pipe is connected to the second horizontally rightward ground heat exchange input pipe. The other end of the second horizontally rightward ground heat exchange input pipe is connected to the first vertically forward ground heat exchange input pipe. The other end of the first vertically forward ground heat exchange input pipe is connected to the water outlet of the circulation water pump; connect the sixth vertically backward ground heat exchange output pipe to the upper left heat exchange water output port of the upper left U-shaped buried heat exchange pipe. The other end of the sixth vertically backward ground heat exchange output pipe is connected to the seventh horizontally leftward ground heat exchange output pipe. The other end of the seventh horizontally leftward ground heat exchange output pipe is connected to the eighth vertically forward ground heat exchange output pipe. The other end of the eighth vertically forward ground heat exchange output pipe is connected to the water inlet of the circulation water pump; the eighth vertically forward ground heat exchange output pipe, the first vertically forward ground heat exchange input pipe, the second horizontally rightward ground heat exchange input pipe, the third vertically backward ground heat exchange input pipe, the fourth vertically leftward ground heat exchange input pipe, and the seventh horizontally leftward ground heat exchange output pipe form a rectangular pipeline for circulating and transporting the ground heat exchange water of the upper left heat well. The length of the fifth vertically forward ground heat exchange input pipe is equal to the length of the sixth vertically backward ground heat exchange output pipe; Step 4: Fabricate respectively: the ninth vertically forward heat exchange water input pipe, the tenth horizontally rightward heat exchange water input pipe, the eleventh vertically backward heat exchange water input pipe, the twelfth vertically forward heat exchange water output pipe, the thirteenth horizontally rightward heat exchange water output pipe, the fourteenth vertically backward heat exchange water output pipe, the fifteenth horizontally leftward heat exchange water output pipe, and the sixteenth vertically forward heat exchange water output pipe; Step 5: Connect the eleventh vertical backward heat exchange water input pipe to the lower right heat exchange water input port of the lower right U-shaped buried heat exchange pipe. Connect the other end of the eleventh vertical backward heat exchange water input pipe to the tenth horizontal rightward heat exchange water input pipe. The other end of the tenth horizontal rightward heat exchange water input pipe communicates with the ninth vertical forward heat exchange water input pipe. The other end of the ninth vertical forward heat exchange water input pipe communicates with the water outlet of the circulation pump. Connect the twelfth vertical forward heat exchange water output pipe to the lower right heat exchange water output port of the lower right U-shaped buried heat exchange pipe. The other end of the twelfth vertical forward heat exchange water output pipe communicates with the thirteenth horizontal rightward heat exchange water output pipe. The other end of the thirteenth horizontal rightward heat exchange water output pipe communicates with the fourteenth vertical backward heat exchange water output pipe. The other end of the fourteenth vertical backward heat exchange water output pipe communicates with the fifteenth horizontal leftward heat exchange water output pipe. The other end of the fifteenth horizontal leftward heat exchange water output pipe communicates with the sixteenth vertical forward heat exchange water output pipe. The other end of the sixteenth vertical forward heat exchange water output pipe communicates with the water inlet of the circulation pump. The sixteenth vertical forward heat exchange water output pipe, the ninth vertical forward heat exchange water input pipe, the tenth horizontal rightward heat exchange water input pipe, the thirteenth horizontal rightward heat exchange water output pipe, the fourteenth vertical backward heat exchange water output pipe, and the fifteenth horizontal leftward heat exchange water output pipe form a rectangular pipeline for circulating and transporting the heat exchange water on the ground of the lower right heat well. The rectangular pipeline for circulating and transporting the heat exchange water on the ground of the lower right heat well coincides vertically and is arranged side by side with the rectangular pipeline for circulating and transporting the heat exchange water on the ground of the upper left heat well. The length of the eleventh vertical backward heat exchange water input pipe is equal to the length of the twelfth vertical forward heat exchange water output pipe.

[0008] Shallow geothermal water is provided in both the upper left heat well and the lower right heat well, and heat exchange water circulates between the circulation pump and the ground source heat pump.

[0009] The heat exchange water flowing out from the water outlet of the circulation pump of the circulation pump successively passes through the first vertical forward ground heat exchange input pipe, the second horizontal rightward ground heat exchange input pipe, the third vertical backward ground heat exchange input pipe, the fourth vertical leftward ground heat exchange input pipe, the fifth vertical forward ground heat exchange input pipe, and the upper left heat exchange water input port, and enters the upper left U-shaped buried heat exchange pipe to exchange heat with the shallow geothermal water in the upper left heat well. After heat exchange, the heat exchange water flows out from the upper left heat exchange water output port and then successively passes through the sixth vertical backward ground heat exchange output pipe, the seventh horizontal leftward ground heat exchange output pipe, and the eighth vertical forward ground heat exchange output pipe, and then enters the water inlet of the circulation pump, and then enters the ground source heat pump.

[0010] The geothermal wells of the present invention are arranged in a rectangular array, with adjacent vertical shafts spaced at equal intervals to ensure the verticality of the vertical shafts. The interval between the vertical shafts should not be too small, otherwise it will affect the geothermal heat exchange effect. The U-shaped buried heat exchange pipes are made of PE pipes and buried vertically. After the ground heat exchange water delivery pipe and the U-shaped buried heat exchange pipe are connected with a U-shaped joint, a water pressure test is carried out on the connected U-shaped buried heat exchange pipes before lowering the pipes into the well, and a pressure test is carried out again after the pipes are lowered into the well to check the airtightness of the buried pipes, further avoiding the influence of pipeline rupture or leakage on the heat exchange performance due to hydraulic imbalance. Each U-shaped buried heat exchange pipe is connected in parallel to achieve non-interference in heat transfer between each pipeline and facilitate control. Connecting the U-shaped buried heat exchange pipes in parallel can improve the risk of thermal short-circuit or reduce its influence, and overcome the defect of overheating of some heat exchange vertical shafts. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic structural diagram of the U-shaped buried heat exchange pipe 7 of the present invention; Figure 3 is a schematic structural diagram of the U-shaped buried heat exchange pipe 7 of the present invention in the top view direction; Figure 4 is a ground layout diagram of the heat wells arranged in a matrix array form of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0012] The present invention will be described in detail below with reference to the accompanying drawings: A ground-source heat pump system with buried pipes arranged in a rectangular array includes heat wells arranged in a matrix array form on the ground, a circulating water pump 5, and a ground-source heat pump 6. A U-shaped buried heat exchange pipe is provided in each heat well. The circulating water pump 5 and the ground-source heat pump 6 are arranged on the ground on the left side of the heat wells arranged in an array. The ground-source heat pump 6 is connected to the circulating water pump 5. The heat exchange water input ends at the tops of the U-shaped buried heat exchange pipes in each heat well are connected to one ends of their respective ground heat exchange water input pipes, and the other ends of their respective ground heat exchange water input pipes are connected to the output end of the circulating water pump 5. The heat exchange water output ends at the tops of the U-shaped buried heat exchange pipes in each heat well are connected to their respective ground heat exchange water output pipes, and the other ends of their respective ground heat exchange water output pipes are connected to the input end of the circulating water pump 5. The sum of the lengths of the respective ground heat exchange water input pipes and the respective ground heat exchange water output pipes connected to the U-shaped buried heat exchange pipes in each heat well is equal. For each heat well in the heat wells arranged in a matrix array form, the sum of the length of the heat exchange water input pipeline connected to the output end of the circulating water pump 5 and the length of the heat exchange water output pipeline connected from the heat well to the input end of the circulating water pump 5 is equal, ensuring that the circulation frequency of the heat exchange water in the U-shaped buried heat exchange pipes in each heat well for heat exchange with the shallow geothermal water 8 in the well is the same, and avoiding overheating of the heat wells close to the circulating water pump 5.

[0013] The upper left top corner of the heat well arranged in a matrix array is the upper left heat well 1, the upper right top corner of the heat well arranged in a matrix array is the upper right heat well 2, the lower left top corner of the heat well arranged in a matrix array is the lower left heat well 3, and the lower right top corner of the heat well arranged in a matrix array is the lower right heat well 4; an upper left U-shaped buried heat exchange pipe 7 is arranged in the upper left heat well 1. On the upper left heat exchange water input port 10 of the upper left U-shaped buried heat exchange pipe 7, a fifth vertically forward ground heat exchange input pipe 16 is connected. The other end of the fifth vertically forward ground heat exchange input pipe 16 is communicated with one end of a fourth vertically leftward ground heat exchange input pipe 15. The other end of the fourth vertically leftward ground heat exchange input pipe 15 is communicated with one end of a third vertically backward ground heat exchange input pipe 14. The other end of the third vertically backward ground heat exchange input pipe 14 is communicated with a second horizontally rightward ground heat exchange input pipe 13. The other end of the second horizontally rightward ground heat exchange input pipe 13 is communicated with a first vertically forward ground heat exchange input pipe 12. The other end of the first vertically forward ground heat exchange input pipe 12 is communicated with the water outlet 21 of the circulation water pump 5; on the upper left heat exchange water output port 11 of the upper left U-shaped buried heat exchange pipe 7, a sixth vertically backward ground heat exchange output pipe 17 is connected. The other end of the sixth vertically backward ground heat exchange output pipe 17 is communicated with a seventh horizontally leftward ground heat exchange output pipe 18. The other end of the seventh horizontally leftward ground heat exchange output pipe 18 is communicated with an eighth vertically forward ground heat exchange output pipe 19. The other end of the eighth vertically forward ground heat exchange output pipe 19 is communicated with the water inlet 20 of the circulation water pump 5; the eighth vertically forward ground heat exchange output pipe 19, the first vertically forward ground heat exchange input pipe 12, the second horizontally rightward ground heat exchange input pipe 13, the third vertically backward ground heat exchange input pipe 14, the fourth vertically leftward ground heat exchange input pipe 15 and the seventh horizontally leftward ground heat exchange output pipe 18 form a rectangular pipeline for circulating and transporting the ground heat exchange water of the upper left heat well, and the length of the fifth vertically forward ground heat exchange input pipe 16 is equal to the length of the sixth vertically backward ground heat exchange output pipe 17; In the lower right heat well 4, a lower right U-shaped buried heat exchange pipe 25 is provided. A eleventh vertical backward heat exchange water input pipe 24 is connected to the lower right heat exchange water input port of the lower right U-shaped buried heat exchange pipe 25. The other end of the eleventh vertical backward heat exchange water input pipe 24 is connected to a tenth horizontal rightward heat exchange water input pipe 23. The other end of the tenth horizontal rightward heat exchange water input pipe 23 communicates with a ninth vertical forward heat exchange water input pipe 22. The other end of the ninth vertical forward heat exchange water input pipe 22 communicates with the water outlet 21 of the circulation water pump 5. A twelfth vertical forward heat exchange water output pipe 26 is connected to the lower right heat exchange water output port of the lower right U-shaped buried heat exchange pipe 25. The other end of the twelfth vertical forward heat exchange water output pipe 26 communicates with a thirteenth horizontal rightward heat exchange water output pipe 27. The other end of the thirteenth horizontal rightward heat exchange water output pipe 27 communicates with a fourteenth vertical backward heat exchange water output pipe 28. The other end of the fourteenth vertical backward heat exchange water output pipe 28 communicates with a fifteenth horizontal leftward heat exchange water output pipe 29. The other end of the fifteenth horizontal leftward heat exchange water output pipe 29 communicates with a sixteenth vertical forward heat exchange water output pipe 30. The other end of the sixteenth vertical forward heat exchange water output pipe 30 communicates with the water inlet 20 of the circulation water pump 5. The sixteenth vertical forward heat exchange water output pipe 30, the ninth vertical forward heat exchange water input pipe 22, the tenth horizontal rightward heat exchange water input pipe 23, the thirteenth horizontal rightward heat exchange water output pipe 27, the fourteenth vertical backward heat exchange water output pipe 28 and the fifteenth horizontal leftward heat exchange water output pipe 29 form a rectangular pipeline for circulating and transporting the ground heat exchange water of the lower right heat well. The length of the eleventh vertical backward heat exchange water input pipe 24 is equal to the length of the twelfth vertical forward heat exchange water output pipe 26.

[0014] A laying method of a ground buried pipe ground source heat pump system arranged in a rectangular array. Heat wells are arranged and drilled in a matrix array form on the ground. A circulation water pump 5 and a ground source heat pump 6 are arranged on the left ground of the heat wells arranged in a matrix array. The ground source heat pump 6 is connected to the circulation water pump 5. The upper left top angle of the heat wells arranged in a matrix array is the upper left heat well 1, and the lower right top angle of the heat wells arranged in a matrix array is the lower right heat well 4. It is characterized by the following steps: The first step: Set the upper left U-shaped buried heat exchange pipe 7 in the upper left heat well 1, and set the lower right U-shaped buried heat exchange pipe 25 in the lower right heat well 4. The second step: Manufacture respectively: a first vertical forward ground heat exchange input pipe 12, a second horizontal rightward ground heat exchange input pipe 13, a third vertical backward ground heat exchange input pipe 14, a fourth vertical leftward ground heat exchange input pipe 15, a fifth vertical forward ground heat exchange input pipe 16, a sixth vertical backward ground heat exchange output pipe 17, a seventh horizontal leftward ground heat exchange output pipe 18, a seventh horizontal leftward ground heat exchange output pipe 18 and an eighth vertical forward ground heat exchange output pipe 19. Step 3: Connect the fifth vertically forward ground heat exchange input pipe 16 to the upper left heat exchange water input port 10 of the upper left U-shaped buried heat exchange pipe 7. The other end of the fifth vertically forward ground heat exchange input pipe 16 communicates with one end of the fourth vertically leftward ground heat exchange input pipe 15. The other end of the fourth vertically leftward ground heat exchange input pipe 15 communicates with one end of the third vertically backward ground heat exchange input pipe 14. The other end of the third vertically backward ground heat exchange input pipe 14 communicates with the second horizontally rightward ground heat exchange input pipe 13. The other end of the second horizontally rightward ground heat exchange input pipe 13 communicates with the first vertically forward ground heat exchange input pipe 12. The other end of the first vertically forward ground heat exchange input pipe 12 communicates with the water outlet 21 of the circulation water pump 5. Connect the sixth vertically backward ground heat exchange output pipe 17 to the upper left heat exchange water output port 11 of the upper left U-shaped buried heat exchange pipe 7. The other end of the sixth vertically backward ground heat exchange output pipe 17 communicates with the seventh horizontally leftward ground heat exchange output pipe 18. The other end of the seventh horizontally leftward ground heat exchange output pipe 18 communicates with the eighth vertically forward ground heat exchange output pipe 19. The other end of the eighth vertically forward ground heat exchange output pipe 19 communicates with the water inlet 20 of the circulation water pump 5. The eighth vertically forward ground heat exchange output pipe 19, the first vertically forward ground heat exchange input pipe 12, the second horizontally rightward ground heat exchange input pipe 13, the third vertically backward ground heat exchange input pipe 14, the fourth vertically leftward ground heat exchange input pipe 15, and the seventh horizontally leftward ground heat exchange output pipe 18 form a rectangular pipeline for circulating and transporting the ground heat exchange water of the upper left heat well. The length of the fifth vertically forward ground heat exchange input pipe 16 is equal to the length of the sixth vertically backward ground heat exchange output pipe 17; Step 4: Fabricate respectively: the ninth vertically forward heat exchange water input pipe 22, the tenth horizontally rightward heat exchange water input pipe 23, the eleventh vertically backward heat exchange water input pipe 24, the twelfth vertically forward heat exchange water output pipe 26, the thirteenth horizontally rightward heat exchange water output pipe 27, the fourteenth vertically backward heat exchange water output pipe 28, the fifteenth horizontally leftward heat exchange water output pipe 29, and the sixteenth vertically forward heat exchange water output pipe 30; Step 5: Connect the eleventh vertical backward hot water input pipe 24 to the lower right hot water input port of the lower right U-shaped buried heat exchange pipe 25. Connect the other end of the eleventh vertical backward hot water input pipe 24 to the tenth horizontal rightward hot water input pipe 23. The other end of the tenth horizontal rightward hot water input pipe 23 is connected to the ninth vertical forward hot water input pipe 22, and the other end of the ninth vertical forward hot water input pipe 22 is connected to the water outlet 21 of the circulation pump 5. Connect the twelfth vertical forward hot water output pipe 26 to the lower right hot water output port of the lower right U-shaped buried heat exchange pipe 25. The other end of the twelfth vertical forward hot water output pipe 26 is connected to the thirteenth horizontal rightward hot water output pipe 27. The other end of the thirteenth horizontal rightward hot water output pipe 27 is connected to the fourteenth vertical backward hot water output pipe 28. The other end of the fourteenth vertical backward hot water output pipe 28 is connected to the fifteenth horizontal leftward hot water output pipe 29. The other end of the fifteenth horizontal leftward 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 water inlet 20 of the circulation pump 5. The sixteenth vertical forward hot water output pipe 30, the ninth vertical forward hot water input pipe 22, the tenth horizontal rightward hot water input pipe 23, the thirteenth horizontal rightward hot water output pipe 27, the fourteenth vertical backward hot water output pipe 28, and the fifteenth horizontal leftward hot water output pipe 29 form a rectangular pipeline for circulating and transporting the ground hot water of the lower right hot well. The rectangular pipeline for circulating and transporting the ground hot water of the lower right hot well and the rectangular pipeline for circulating and transporting the ground hot water of the upper left hot well are vertically overlapped and arranged side by side. The length of the eleventh vertical backward hot water input pipe 24 is equal to the length of the twelfth vertical forward hot water output pipe 26; The layout method of the input and output pipelines of the hot water connected to the lower left hot well 3, and the layout method of the input and output pipelines of the hot water connected to the upper right hot well 2 are the same as the layout methods of the input and output pipelines of the upper left hot well 1 and the lower right hot well 4 described above.

[0015] Shallow geothermal water 8 is provided in both the upper left hot well 1 and the lower right hot well 4, and hot water 9 circulates between the circulation pump 5 and the ground source heat pump 6. The hot water 9 is output from the ground source heat pump 6 and then enters the circulation pump 5. Then, it enters the hot well through the hot water input pipeline for heat exchange. The heat-exchanged hot water enters the circulation 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.

[0016] The heat exchange water 9 flowing out from the outlet 21 of the circulating water pump 5 of the circulating water pump successively passes through the first vertically forward ground heat exchange input pipe 12, the second horizontally rightward ground heat exchange input pipe 13, the third vertically backward ground heat exchange input pipe 14, the fourth vertically leftward ground heat exchange input pipe 15, the fifth vertically forward ground heat exchange input pipe 16 and the upper left heat exchange water input port 10, and enters the upper left U-shaped buried ground heat exchange pipe 7, where it exchanges heat with the shallow geothermal water 8 in the upper left heat well 1. After the heat exchange, the heat exchange water flows out from the upper left heat exchange water output port 11, and then successively passes through the sixth vertically backward ground heat exchange output pipe 17, the seventh horizontally leftward ground heat exchange output pipe 18 and the eighth vertically forward ground heat exchange output pipe 19 and then enters the water inlet 20 of the circulating water pump 5, and then enters the ground source heat pump 6; because the heat exchange water circulation path lengths of each heat well arranged in a matrix array form are basically equal, the heat exchange cycle frequencies of each heat well are basically the same, that is, the geothermal heat exchange is made uniform, and it also avoids the occurrence of functional failure of the heat exchange shaft due to the high heat exchange cycle frequency of the heat well closer to the circulating water pump, and phenomena such as shaft collapse, water leakage, blockage, and cracks.

Claims

1. A layout method for a buried pipe ground source heat pump system arranged in a rectangular array. Heat wells are drilled and arranged in a matrix array form on the ground. A circulating water pump (5) and a ground source heat pump (6) are arranged on the left ground of the heat wells arranged in the matrix array. The ground source heat pump (6) is connected to the circulating water pump (5). The upper left vertex angle of the heat wells arranged in the matrix array is the upper left heat well (1), and the lower right vertex angle of the heat wells arranged in the matrix array is the lower right heat well (4); It is characterized in that The following steps: First step: Set the upper left U-shaped buried heat exchange pipe (7) in the upper left heat well (1), and set the lower right U-shaped buried heat exchange pipe (25) in the lower right heat well (4); Second step: Manufacture respectively: the first vertical forward ground heat exchange input pipe (12), the second horizontal rightward ground heat exchange input pipe (13), the third vertical backward ground heat exchange input pipe (14), the fourth vertical leftward ground heat exchange input pipe (15), the fifth vertical forward ground heat exchange input pipe (16), the sixth vertical backward ground heat exchange output pipe (17), the seventh horizontal leftward ground heat exchange output pipe (18), the seventh horizontal leftward ground heat exchange output pipe (18) and the eighth vertical forward ground heat exchange output pipe (19); Third step: Connect the fifth vertical forward ground heat exchange input pipe (16) to the upper left heat exchange water input port (10) of the upper left U-shaped buried heat exchange pipe (7). The other end of the fifth vertical forward ground heat exchange input pipe (16) is communicated with one end of the fourth vertical leftward ground heat exchange input pipe (15). The other end of the fourth vertical leftward ground heat exchange input pipe (15) is communicated with one end of the third vertical backward ground heat exchange input pipe (14). The other end of the third vertical backward ground heat exchange input pipe (14) is communicated with the second horizontal rightward ground heat exchange input pipe (13). The other end of the second horizontal rightward ground heat exchange input pipe (13) is communicated with the first vertical forward ground heat exchange input pipe (12). The other end of the first vertical forward ground heat exchange input pipe (12) is communicated with the water outlet (21) of the circulation water pump (5). Connect the sixth vertical backward ground heat exchange output pipe (17) to the upper left heat exchange water output port (11) of the upper left U-shaped buried heat exchange pipe (7). The other end of the sixth vertical backward ground heat exchange output pipe (17) is communicated with the seventh horizontal leftward ground heat exchange output pipe (18). The other end of the seventh horizontal leftward ground heat exchange output pipe (18) is communicated with 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 communicated with the water inlet (20) of the circulation 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 rightward ground heat exchange input pipe (13), the third vertical backward ground heat exchange input pipe (14), the fourth vertical leftward ground heat exchange input pipe (15) and the seventh horizontal leftward ground heat exchange output pipe (18) form a rectangular pipeline for circulating and transporting the ground heat exchange 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); Fourth step: Manufacture respectively: the ninth vertical forward heat exchange water input pipe (22), the tenth horizontal rightward heat exchange water input pipe (23), the eleventh vertical backward heat exchange water input pipe (24), the twelfth vertical forward heat exchange water output pipe (26), the thirteenth horizontal rightward heat exchange water output pipe (27), the fourteenth vertical backward heat exchange water output pipe (28), the fifteenth horizontal leftward heat exchange water output pipe (29) and the sixteenth vertical forward heat exchange water output pipe (30); Step 5: Connect the eleventh vertical backward hot water input pipe (24) to the lower right hot water input port of the lower right U-shaped buried heat exchange pipe (25). Connect the other end of the eleventh vertical backward hot water input pipe (24) to the tenth horizontal rightward hot water input pipe (23). The other end of the tenth horizontal rightward hot water input pipe (23) communicates with the ninth vertical forward hot water input pipe (22). The other end of the ninth vertical forward hot water input pipe (22) communicates with the water outlet (21) of the circulation pump (5). Connect the twelfth vertical forward hot water output pipe (26) to the lower right hot water output port of the lower right U-shaped buried heat exchange pipe (25). The other end of the twelfth vertical forward hot water output pipe (26) communicates with the thirteenth horizontal rightward hot water output pipe (27). The other end of the thirteenth horizontal rightward hot water output pipe (27) communicates with the fourteenth vertical backward hot water output pipe (28). The other end of the fourteenth vertical backward hot water output pipe (28) communicates with the fifteenth horizontal leftward hot water output pipe (29). The other end of the fifteenth horizontal leftward hot water output pipe (29) communicates with the sixteenth vertical forward hot water output pipe (30). The other end of the sixteenth vertical forward hot water output pipe (30) communicates with the water inlet (20) of the circulation pump (5). The sixteenth vertical forward hot water output pipe (30), the ninth vertical forward hot water input pipe (22), the tenth horizontal rightward hot water input pipe (23), the thirteenth horizontal rightward hot water output pipe (27), the fourteenth vertical backward hot water output pipe (28), and the fifteenth horizontal leftward hot water output pipe (29) form a rectangular pipeline for circulating and transporting the ground hot water exchange of the lower right hot well. The rectangular pipeline for circulating and transporting the ground hot water exchange of the lower right hot well coincides vertically and is arranged side by side with the rectangular pipeline for circulating and transporting the ground hot water exchange of the upper left hot well. The length of the eleventh vertical backward hot water input pipe (24) is equal to the length of the twelfth vertical forward hot water output pipe (26).

2. The layout method of a buried pipe ground source heat pump system arranged in a rectangular array according to claim 1, characterized in that, Shallow geothermal water (8) is provided in both the upper left hot well (1) and the lower right hot well (4). Hot water for heat exchange (9) circulates between the circulation pump (5) and the ground source heat pump (6).

3. The layout method of a buried pipe ground source heat pump system arranged in a rectangular array according to claim 2, characterized in that, The hot water for heat exchange (9) flowing out from the water outlet of the circulation pump (5) of the circulation pump (21) successively passes through the first vertical forward ground heat exchange input pipe (12), the second horizontal rightward ground heat exchange input pipe (13), the third vertical backward ground heat exchange input pipe (14), the fourth vertical leftward ground heat exchange input pipe (15), the fifth vertical forward ground heat exchange input pipe (16), and the upper left hot water input port (10), and enters the upper left U-shaped buried heat exchange pipe (7) to exchange heat with the shallow geothermal water (8) in the upper left hot well (1). After heat exchange, the hot water for heat exchange flows out from the upper left hot water output port (11) and then successively passes through the sixth vertical backward ground heat exchange output pipe (17), the seventh horizontal leftward ground heat exchange output pipe (18), and the eighth vertical forward ground heat exchange output pipe (19) and then enters the water inlet (20) of the circulation pump (5), and then enters the ground source heat pump (6).

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