Water source heat pump energy supply system

Abstract

The utility model discloses a water source heat pump energy supply system which comprises a surface water taking position, a surface water returning position, a first underground water taking well, a second underground water taking well, a water source heat pump unit, a water taking tank, a first recharge well set and a second recharge well set. A surface water taking cavity and an underground water taking cavity are formed in the water taking tank, and a first three-way switching valve is arranged between the water source side inlet end of the water source heat pump unit and the surface water taking cavity and the underground water taking cavity; a second three-way switching valve is arranged among the water source side outlet end of the water source heat pump unit, the surface water return pipeline and the underground water return pipeline; and the surface water return pipeline is communicated with the first recharge well group and the second recharge well group. According to the water source heat pump energy supply system, surface water and underground water can be switched to supply water to the water source heat pump unit according to the requirements of users, and when the surface water is used for supplying water, heat exchange can be formed between the underground water and the surface water, so that the water inlet temperature of the surface water tends to be stable, and the water source heat pump unit runs stably.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat pumps, and in particular relates to a water source heat pump energy supply system. Background Art

[0002] Water source heat pump units use water as a heat source and are air-conditioning devices that can be used for cooling and heating. The water source for water source heat pumps can be obtained from surface water, groundwater, etc. When surface water is used as a water source, it has the advantage of sufficient water resources, but since surface water can receive sunlight, its temperature fluctuates greatly. When groundwater is used as a water source, it has the advantage of relatively stable temperature, but groundwater has a small reserve and a low groundwater seepage rate. Therefore, for the use of the above two water sources, further research and development can be carried out on the water source acquisition methods for water source heat pumps. Utility Model Content

[0003] In response to the above technical problems, the purpose of the present utility model is to provide a water source heat pump energy supply system that combines groundwater and surface water.

[0004] To achieve the above purpose, the present invention provides the following technical solutions:

[0005] A water source heat pump energy supply system, including a surface water intake point, a surface water return point, a first underground water intake well, a second underground water intake well, and a water source heat pump unit;

[0006] It also includes a water intake tank, a first recharge well group, and a second recharge well group;

[0007] The water intake tank has a surface water intake cavity and a groundwater intake cavity, and the groundwater intake cavity is arranged around the surface water intake cavity. The water source side inlet end of the water source heat pump unit is connected with the surface water intake cavity and the groundwater intake cavity respectively. A first three-way switching valve is provided between the water source side inlet end of the water source heat pump unit and the surface water intake cavity and the groundwater intake cavity.

[0008] The first underground water intake well, the second underground water intake well and the underground water intake cavity are connected;

[0009] The water source side outlet of the water source heat pump unit is connected to the surface water return pipe and the groundwater return pipe, and a second three-way switching valve is provided between the water source side outlet of the water source heat pump unit and the surface water return pipe and the groundwater return pipe;

[0010] The groundwater return pipe is connected to a first return branch and a second return branch. A third three-way switching valve is provided between the groundwater return pipe and the first return branch and the second return branch. The first return branch is connected to the first recharge well group, and the second return branch is connected to the second recharge well group.

[0011] The first recharge well group is arranged around the first underground water well, and the second recharge well group is arranged around the second underground water well.

[0012] As a further embodiment, the first recharge well group includes at least four first recharge wells, the four first recharge wells are respectively distributed around the first water intake well, and the four first recharge wells are respectively connected in parallel with the first water return branch through a first connecting pipe;

[0013] The second recharge well group includes at least four second charging wells, which are respectively distributed around the second water intake well, and the four second charging wells are respectively connected in parallel with the second water return branch through the second connecting pipe.

[0014] As a further embodiment, a first flow control valve and a first flow meter are installed on the first communicating pipe, and the first flow meter forms a signal connection with the first flow control valve;

[0015] A second flow control valve and a second flow meter are installed on the second communicating pipe, and the second flow meter forms a signal connection with the second flow control valve.

[0016] As a further embodiment, the surface water return pipe is installed with a first check valve, and the groundwater return pipe is installed with a second check valve.

[0017] As a further embodiment, the first underground water intake well is connected to a first water intake pipe, the second underground water intake well is connected to a second water intake pipe, the groundwater intake chamber of the water intake tank is connected to a groundwater supply pipe, and a fourth three-way switching valve is arranged between the groundwater supply pipe and the first water intake pipe and the second water intake pipe.

[0018] As a further embodiment, the surface water intake cavity is cylindrical and arranged in the center of the water intake box, and the groundwater intake cavity is annular and surrounds the outer circumference of the surface water intake cavity.

[0019] By adopting the above technical solution, compared with the existing technology, the beneficial effect of the present invention is: the water source heat pump energy supply system can switch surface water and groundwater to supply water to the water source heat pump unit according to user needs, and when surface water is used for water supply, groundwater can form heat exchange with surface water, so that the inlet temperature of the surface water tends to be stable, so that the water source heat pump unit can operate stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the energy supply system of the present utility model;

[0021] Figure 2 This is a schematic diagram of the interior of the water tank in the present utility model;

[0022] The reference numerals in the accompanying drawings represent the following:

[0023] 10. Surface water intake, 11. Surface water return, 12. First underground water well, 13. Second underground water well, 14. Water source heat pump unit, 15. Water intake tank, 16. First recharge well group, 17. Second recharge well group, 18. Surface water intake pump, 19. Surface water intake cavity, 20. Groundwater intake cavity, 21. First three-way switching valve, 22. Water intake main, 23. Water intake pump, 24. First water intake auxiliary pipe, 25. Second water intake auxiliary pipe, 26. Surface water return pipe, 27. Groundwater return pipe, 28. Second three-way switching valve, 29. First Return water branch, 30, second return water branch, 31, third three-way switching valve, 32, first injection well, 33, first connecting pipe, 34, second injection well, 35, second connecting pipe, 36, first flow control valve, 37, first flow meter, 38, second flow control valve, 39, second flow meter, 40, first check valve, 41, second check valve, 42, first water intake pipe, 43, second water intake pipe, 44, groundwater supply pipe, 45, fourth three-way switching valve, 46, reinjection pipe, 47, reinjection water pump, 48, cylinder, 49, support ring, 50, sealing cover. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See Figure 1 、 2 As shown, the water source heat pump energy supply system includes a surface water intake point 10, a surface water return point 11, a first underground water intake well 12, a second underground water intake well 13, a water source heat pump unit 14, a water intake tank 15, a first reinjection well group 16, and a second reinjection well group 17; the surface water intake point 10, the first underground water intake well 12, and the second underground water intake well 13 respectively provide water sources for the water source side of the water source heat pump unit 14, and the water source obtained from the surface water intake point 10 through the surface water intake pump 18 passes through the water source heat pump unit 14 and is discharged from the surface water return point 11; when the water source heat pump draws water from the underground well, the water discharged by the water source heat pump is reinjected into the ground through the reinjection well group.

[0026] The water intake tank 15 has an insulation function. The water intake tank 15 is provided with a surface water intake chamber 19 and a groundwater intake chamber 20. The groundwater intake chamber 20 is arranged around the surface water intake chamber 19. The water source side inlet end of the water source heat pump unit 14 is connected with the surface water intake chamber 19 and the groundwater intake chamber 20 respectively. A first three-way switching valve 21 is provided between the water source side inlet end of the water source heat pump unit 14 and the surface water intake chamber 19 and the groundwater intake chamber 20. Through the first three-way switching valve 21, the surface water intake chamber 19 can be connected with the water source side inlet end of the water source heat pump unit 14, or the groundwater intake chamber 20 can be connected with the water source side inlet end of the water source heat pump unit 14. The water source intake point is selected according to needs.

[0027] The water source side inlet end of the water source heat pump unit 14 is connected to a water intake main pipe 22, on which a water intake pump 23 is installed. The water intake main pipe 22 is also connected to a first water intake auxiliary pipe 24 and a second water intake auxiliary pipe 25. The first three-way switching valve 21 is connected between the water intake main pipe 22, the first water intake auxiliary pipe 24, and the second water intake auxiliary pipe 25, and is used to switch the connection between the water intake main pipe 22 and the first water intake auxiliary pipe 24 or the second water intake auxiliary pipe 25, thereby switching the water intake point of the water source heat pump unit 14; the first water intake auxiliary pipe 24 is connected to the groundwater intake cavity 20, and the second water intake auxiliary pipe 25 is connected to the surface water intake cavity 19.

[0028] Among them, the first underground water intake well 12 and the second underground water intake well 13 are connected to the groundwater intake chamber 20. Groundwater can be delivered into the groundwater intake chamber 20 through the first underground water intake well 12 and the second underground water intake well 13. The groundwater delivery method can be switched between the first underground water intake well 12 and the second underground water intake well 13.

[0029] The water source outlet of the water source heat pump unit 14 is connected to a surface water return pipe 26 and a groundwater return pipe 27. A second three-way switching valve 28 is provided between the water source outlet of the water source heat pump unit 14 and the surface water return pipe 26 and the groundwater return pipe 27. The surface water return pipe 26 is connected to the surface water return point 11. When surface water is used to supply the water source heat pump, the return water from the water source heat pump flows through the surface water return pipe 26 to the surface water return point 11. The groundwater return pipe 27 is used to connect the first and second recharge well groups 16 and 17. When groundwater is used to supply the water source heat pump, the return water from the water source heat pump is recharged to the first and second recharge well groups 16 and 17 through the groundwater return pipe 27. The second three-way switching valve 28 can switch the return water flow of the water source heat pump between the surface water return pipe 26 and the groundwater return pipe 27.

[0030] Among them, the groundwater return pipe 27 is connected to the first return branch 29 and the second return branch 30, and a third three-way switching valve 31 is arranged between the groundwater return pipe 27 and the first return branch 29 and the second return branch 30. The first return branch 29 is connected to the first reinjection well group 16, and the second return branch 30 is connected to the second reinjection well group 17; through the setting of the third three-way switching valve 31, the groundwater return can be switched between the first return branch 29 and the second return branch 30, that is, the groundwater return can be switched between the first reinjection well group 16 and the second reinjection well group 17.

[0031] Among them, the first recharge well group 16 is arranged around the first underground water well 12, and the recharge water in the first recharge well group 16 can penetrate toward the first underground water well 12; the second recharge well group 17 is arranged around the second underground water well 13, and the recharge water in the second recharge well group 17 can penetrate toward the second underground water well 13.

[0032] During use, when it is necessary to use surface water to supply water to the water source heat pump unit 14, the water source side inlet end of the water source heat pump unit 14 can be connected to the surface water intake chamber 19 by switching the first three-way switching valve 21, and the water source side outlet end of the water source heat pump unit 14 can be connected to the surface water return point 11 by switching the second three-way switching valve 28. In this way, the surface water passes through the water source heat pump unit 14 and is discharged into the surface water return point 11; when it is necessary to use groundwater to supply water to the water source heat pump unit 14, the first three-way switching valve 21 and the second three-way switching valve 28 are switched to connect the water source heat pump unit 14 to the surface water return point 11. The water source side inlet end of the unit 14 is connected to the groundwater intake chamber 20, and the water source side outlet end is connected to the groundwater return pipe 27, so that the groundwater is discharged into the ground after passing through the water source heat pump; generally, in summer (winter), the temperature of groundwater is lower (higher) than the temperature of surface water. When surface water is used to supply water to the water source heat pump, the groundwater can be transported to the groundwater intake chamber 20. Since the surface water intake chamber 19 is in the groundwater intake chamber 20, the groundwater and the surface water can form heat exchange to a certain extent, so that the temperature of the surface water supplied to the water source heat pump unit 14 tends to be stable.

[0033] When groundwater is used to supply water to the water source heat unit, for example in summer, the first underground water well 12 is used to supply water to the groundwater intake cavity 20. After passing through the water source heat pump unit 14, the groundwater temperature rises, so that the groundwater can be discharged toward the second recharge well group 17 to increase the groundwater temperature at the second underground water well 13. In this way, when the water source heat pump needs to heat across seasons, it switches to taking water from the second underground water well 13. The obtained water temperature is higher than the temperature in the first underground water well 12, thereby correspondingly increasing the water temperature entering the water source heat pump unit 14. The groundwater temperature discharged from the water source heat pump unit 14 drops, and it is discharged toward the first recharge well group 16 to reduce the groundwater temperature at the first underground location. This water source heat pump energy supply system can switch between surface water and groundwater to supply water to the water source heat pump unit 14 according to user needs. When surface water is used for water supply, groundwater can form heat exchange with surface water, so that the inlet temperature of the surface water tends to be stable, so that the water source heat pump unit 14 can operate stably.

[0034] In some implementations, the first recharge well group 16 includes at least four first recharge wells 32, and the four first recharge wells 32 are respectively distributed around the first water intake well. The four first recharge wells 32 are respectively connected in parallel with the first return water branch 29 through the first connecting pipe 33; through the four first recharge wells 32 distributed around the first water intake well, the return water returning to the first water intake well can be made to infiltrate toward the first water intake well in a more balanced and stable manner.

[0035] In some implementations, the second recharge well group 17 includes at least four second recharge wells 34, which are distributed around the second water intake well. The four second recharge wells 34 are connected in parallel with the second return water branch 30 via second connecting pipes 35. The four second recharge wells 34 distributed around the second water intake well allow the return water flowing back to the second water intake well to infiltrate toward the second water intake well in a more balanced and stable manner.

[0036] In some embodiments, the inner diameters of the four first connecting pipes 33 are the same, and the four first injection wells 32 are at the same distance from the first water intake well. A first flow control valve 36 and a first flow meter 37 are installed on each first connecting pipe 33. The first flow meter 37 forms a signal connection with the first flow control valve 36. The first flow meter 37 monitors the return water flow in the first connecting pipe 33 and, through the control of the first flow control valve 36, makes the return water flow in the four first connecting pipes 33 tend to be consistent, thereby ensuring the stability of the return water toward the first water intake well.

[0037] In some implementations, a second flow control valve 38 and a second flow meter 39 are installed on the second connecting pipe 35, and the second flow meter 39 is signal-connected to the second flow control valve 38. The second flow meter 39 also monitors the return water flow in the second connecting pipe 35. The second flow control valve 38 controls the return water flow in the four second connecting pipes 35 to be consistent, thereby ensuring the stability of the return water flow to the second water intake well.

[0038] In some implementations, the surface water return pipe 26 is installed with a first check valve 40 , and the groundwater return pipe 27 is installed with a second check valve 41 to prevent backflow in the return water branch.

[0039] In some implementations, the first underground water well 12 is connected to a first water intake pipe 42, the second underground water well 13 is connected to a second water intake pipe 43, and the groundwater intake chamber 20 of the water intake tank 15 is connected to a groundwater delivery pipe 44. A fourth three-way switching valve 45 is provided between the groundwater delivery pipe 44 and the first water intake pipe 42 and the second water intake pipe 43. The fourth three-way switching valve 45 can establish communication between the groundwater delivery pipe 44 and the first water intake pipe 42 or the second water intake pipe 43, thereby switching the water intake state from the first water intake well to the second water intake well.

[0040] In some implementations, the groundwater intake chamber 20 is also connected to a recharge pipe 46, on which a recharge water pump 47 is installed. The recharge pipe 46 is connected to the groundwater return pipe 27, so that when the groundwater is used as surface water for heat exchange, the groundwater in the groundwater intake chamber 20 can be circulated and replaced.

[0041] In some implementations, the surface water intake chamber 19 is cylindrical and arranged in the center of the water intake tank 15, while the groundwater intake chamber 20 is annular and surrounds the outer periphery of the surface water intake chamber 19. The main body of the water intake tank 15 is also cylindrical, with a cylinder 48 welded to its center. The surface water intake chamber 19 is formed within the cylinder 48, and the groundwater intake chamber 20 is formed between the outer wall of the cylinder 48 and the inner wall of the water intake tank 15. A support ring 49 with a through hole can be added between the cylinder 48 and the water intake tank 15. The inner ring of the support ring 49 abuts the outer periphery of the cylinder 48, and the outer ring of the support ring 49 abuts the inner wall of the water intake tank 15, thereby enhancing the structural stability of the water intake tank 15. A cover 50 can be installed on the top of the water intake tank 15 for protection.

[0042] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A water source heat pump energy supply system, comprising a surface water intake, a surface water return, a first underground water intake well, a second underground water intake well, and a water source heat pump unit, characterized in that: It also includes a water intake tank, a first recharge well group, and a second recharge well group; The water intake tank has a surface water intake cavity and a groundwater intake cavity, and the groundwater intake cavity is arranged around the surface water intake cavity. The water source side inlet end of the water source heat pump unit is connected with the surface water intake cavity and the groundwater intake cavity respectively. A first three-way switching valve is provided between the water source side inlet end of the water source heat pump unit and the surface water intake cavity and the groundwater intake cavity. The first underground water intake well, the second underground water intake well and the underground water intake cavity are connected; The water source side outlet of the water source heat pump unit is connected to the surface water return pipe and the groundwater return pipe, and a second three-way switching valve is provided between the water source side outlet of the water source heat pump unit and the surface water return pipe and the groundwater return pipe; The groundwater return pipe is connected to a first return branch and a second return branch. A third three-way switching valve is provided between the groundwater return pipe and the first return branch and the second return branch. The first return branch is connected to the first recharge well group, and the second return branch is connected to the second recharge well group. The first recharge well group is arranged around the first underground water well, and the second recharge well group is arranged around the second underground water well.

2. The water source heat pump energy supply system according to claim 1, characterized in that: The first recharge well group includes at least four first recharge wells, which are respectively distributed around the first water intake well and are respectively connected in parallel with the first water return branch through a first connecting pipe; The second recharge well group includes at least four second charging wells, which are respectively distributed around the second water intake well, and the four second charging wells are respectively connected in parallel with the second water return branch through the second connecting pipe.

3. The water source heat pump energy supply system according to claim 1, characterized in that: A first flow control valve and a first flow meter are installed on the first communicating pipe, and the first flow meter forms a signal connection with the first flow control valve; A second flow control valve and a second flow meter are installed on the second communicating pipe, and the second flow meter forms a signal connection with the second flow control valve.

4. The water source heat pump energy supply system according to claim 1, characterized in that: The surface water return pipe is installed with a first check valve, and the groundwater return pipe is installed with a second check valve.

5. The water source heat pump energy supply system according to claim 1, characterized in that: The first underground water intake well is connected to the first water intake pipe, the second underground water intake well is connected to the second water intake pipe, the underground water intake chamber of the water intake tank is connected to the underground water supply pipe, and a fourth three-way switching valve is arranged between the underground water supply pipe and the first water intake pipe and the second water intake pipe.

6. The water source heat pump energy supply system according to claim 1, characterized in that: The surface water intake cavity is cylindrical and arranged in the center of the water intake tank, and the groundwater intake cavity is annular and surrounds the outer periphery of the surface water intake cavity.

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