Single-well heat exchange water ground source heat pump system

Abstract

The utility model provides a single well heat exchange water ground source heat pump system which comprises a heat pump unit, one end of the heat pump unit is connected to a user side, the other end of the heat pump unit is connected with a heat exchanger through a circulating pump, and the other end of the heat exchanger is provided with a water inlet pipe and a water return pipe. A partition plate is arranged in the tube well and divides the tube well into a water inlet cavity and a water outlet cavity, a plurality of water inlet holes communicated with the water inlet cavity are formed in the side wall of the tube well, a water pump is arranged in the water inlet cavity, a water outlet of the water pump is connected with a water inlet pipe, and a plurality of water outlet holes communicated with the water outlet cavity are further formed in the side wall of the tube well. According to the single-well heat exchange water ground source heat pump system, underground water in the tube well water inlet cavity is conveyed to the heat pump unit through the water pump, water subjected to heat exchange is drained into the underground water through the drainage hole of the tube well drainage cavity, the water ground source heat pump system is simple in structure and convenient and fast to construct, and the heat exchange efficiency of a water ground source heat pump is high.

Description

Technical Field

[0001] The utility model relates to the technical field of water-source heat pumps, in particular to a single-well hot water-exchanging ground-source heat pump system. Background Art

[0002] The water-source heat pump system is an efficient and energy-saving air-conditioning system that can provide both heating and cooling by using shallow underground geothermal resources (also known as geothermal energy, including groundwater, soil or surface water, etc.). The system realizes the transfer of low-temperature heat energy to high-temperature heat energy by inputting a small amount of electrical energy. The geothermal energy is used as the heat source for heat pump heating in winter and the cold source for air conditioning in summer. The unit consumes 1KW of energy and obtains more than 4-5KW of cold / heat. The energy comes from underground energy. The system does not emit any waste gas, wastewater, or waste residue to the outside world. It is an ideal "green air conditioner" and can be widely used in office buildings, hotels, schools, dormitories, hospitals, restaurants, shopping malls, villas, residences and other fields. The water-source heat pump overcomes the deficiency of frosting of the outdoor heat exchanger of the air-source heat pump in winter, and has high operating reliability and heating efficiency. It has been widely used in China in recent years and can be widely used in office buildings, hotels, schools, dormitories, hospitals, restaurants, shopping malls, villas, residences and other fields.

[0003] However, the existing water-source heat pump system has a complex structure and is inconvenient to construct. This solution aims to solve this technical problem. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides a single-well water-exchange water ground-source heat pump system, in which the groundwater in the water inlet cavity of the pipe well is transported to the heat exchanger through a water pump and finally utilized by a heat pump unit, and the water after heat exchange is discharged into the groundwater through the drainage hole in the drainage cavity of the pipe well. The water-source heat pump system has a simple structure, is convenient and quick to construct, and has a high heat exchange efficiency.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a single-well hot water exchange ground source heat pump system, comprising a heat pump unit, one end of which is connected to the user end, the other end of which is connected to a heat exchanger through a circulating pump, and the other end of which is respectively provided with a water inlet pipe and a water return pipe;

[0006] It also includes a pipe well buried in the groundwater layer, wherein a partition is arranged in the pipe well, and the partition separates the pipe well into a water inlet chamber and a drainage chamber. The side wall of the pipe well is provided with a plurality of water inlet holes connected with the water inlet chamber, a water pump is arranged in the water inlet chamber, and the water outlet of the water pump is connected with the water inlet pipe. The side wall of the pipe well is also provided with a plurality of drainage holes connected with the drainage chamber, and the return pipe is connected with the drainage chamber.

[0007] The bottom end of the pipe well is provided with a bottom plate, and the top end of the pipe well is provided with a top cover.

[0008] The water inlet pipe is arranged through the top cover, and the water return pipe penetrates the side wall of the pipe well and is communicated with the drainage cavity.

[0009] A plurality of connecting pipes are arranged in the water inlet cavity, one end of the plurality of connecting pipes passes through the partition plate and is connected with the drainage cavity, and the other ends of the plurality of connecting pipes are connected with the return pipe.

[0010] The water inlet pipe is provided with a sand removal and filtering device.

[0011] The outer side of the water inlet hole and the outer side of the drain hole are both covered with filter screens.

[0012] An upper sealing plate and a lower sealing plate are respectively arranged in the water inlet cavity, the other ends of the plurality of connecting pipes are arranged through the lower sealing plate, the upper sealing plate and the lower sealing plate form a distribution cavity, and the return pipe is connected to the distribution cavity.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] (1) A water inlet cavity and a drainage cavity are provided in the pipe well. The water inlet pipe of the heat exchanger is connected to the water inlet cavity, and the water outlet pipe is connected to the drainage cavity. The civil construction of the water-source heat pump system can be completed by burying the pipe well once. The structure of the water-source heat pump system is simpler and the construction is more convenient and quicker.

[0015] (2) The water inlet cavity is provided with a plurality of water inlet holes, and the water discharge cavity is provided with a plurality of water discharge holes. The groundwater source on the upper part of the partition is transported to the heat exchanger through the water inlet holes by a water pump, and the water is discharged to the groundwater source under the partition through the water discharge holes to exchange heat with the groundwater. The partition separates the water inlet and the water discharge. The arrangement of the water inlet and the water discharge holes makes the heat exchange efficiency of the single-well hot water exchange ground source heat pump system higher;

[0016] (3) The water inlet pipe and the water return pipe are interconnected closed pipes, which, on the one hand, avoid groundwater contamination. On the other hand, since the water inlet and water return of the heat exchanger are the same, and the drainage hole is located below the water inlet hole, part of the groundwater discharged from the drainage hole can be discharged again through the water inlet hole by the water pump, thus avoiding the groundwater loss caused by the groundwater discharged from the drainage hole overflowing to the ground, and the applicability of the heat pump system is stronger;

[0017] (4) A number of connecting pipes are arranged in the water inlet chamber, one end of which passes through the partition and is connected to the drainage chamber, and the other end of which is connected to the return pipe. By arranging the connecting pipes in the water inlet chamber, the burial construction of the pipe well is more convenient and safer, and the maintenance of the connecting pipes is easier. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is a schematic diagram of the overall structure of the utility model.

[0019] Figure 2 This utility model Figure 1 Schematic diagram of the local enlarged structure of part A.

[0020] Figure 3 It is a schematic diagram of the internal structure of the pipe well in Example 1 of the utility model.

[0021] Figure 4 It is a schematic diagram of the internal structure of the pipe well in the second embodiment of the utility model.

[0022] Among them, in the figure: 1. heat pump unit; 11. circulation pump; 2. heat exchanger; 21. water inlet pipe; 22. return pipe; 3. pipe well; 31. water inlet chamber; 32. drainage chamber; 33. water inlet hole; 34. drainage hole; 35. bottom plate; 36. top cover; 37. filter screen; 4. partition; 5. water pump; 6. connecting pipe; 7. sand removal and filtering device; 8. upper sealing plate; 9. lower sealing plate. DETAILED DESCRIPTION

[0023] In order to more clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods.

[0024] Example 1: See Figure 1-Figure 3 A single-well hot water ground source heat pump system comprises a heat pump unit 1, one end of the heat pump unit 1 is connected to a user end, the other end of the heat pump unit 1 is connected to a heat exchanger 2 through a circulating pump 11, and the other end of the heat exchanger 2 is respectively provided with a water inlet pipe 21 and a water return pipe 22;

[0025] It also includes a pipe well 3 buried in the groundwater layer, with a partition 4 arranged in the pipe well 3, the partition 4 divides the pipe well 3 into a water inlet chamber 31 and a drainage chamber 32, a side wall of the pipe well 3 is provided with a plurality of water inlet holes 33 connected with the water inlet chamber 31, a water pump 5 is arranged in the water inlet chamber 31, the water outlet of the water pump 5 is connected with the water inlet pipe 21, a side wall of the pipe well 3 is also provided with a plurality of drainage holes 34 connected with the drainage chamber 32, and the return pipe 22 is connected with the drainage chamber 32.

[0026] A bottom plate 35 is provided at the bottom end of the pipe well 3 , and a top cover 36 is provided at the top end of the pipe well 3 .

[0027] The water inlet pipe 21 is disposed through the top cover 36 , and the water return pipe 22 penetrates the side wall of the pipe well 3 and is communicated with the drainage cavity 32 .

[0028] A plurality of connecting pipes 6 are arranged in the water inlet cavity 31 , one end of the plurality of connecting pipes 6 passes through the partition plate 4 and is connected with the water discharge cavity 32 , and the other end of the plurality of connecting pipes 6 is connected with the water return pipe 22 .

[0029] The water inlet pipe 21 is provided with a sand removal filter device 7 , wherein the sand removal filter device 7 is a cyclone sand removal filter, and the sand removal filter device 7 is used to remove the silt in the groundwater.

[0030] The outside of the water inlet hole 33 and the outside of the drainage hole 34 are both covered with a filter screen 37, and large particles of impurities in the groundwater are removed through the filter screen 37.

[0031] The water inlet pipe 21 and the water return pipe 22 are formed by interconnected closed pipes, thereby preventing groundwater from being polluted and lost on the ground.

[0032] In this embodiment, the water inlet chamber 31 and the drainage chamber 32 are made of two sections of plastic pipes separated by a partition 4. The outer diameter of the partition 4 is the same as the outer diameter of the plastic pipe. The water inlet chamber 31 and the drainage chamber 32 are combined together by arranging a pipe straight joint on the outer side of the partition 4 and firmly bonding them with glue. The bottom plate 35 and the top cover 36 are both realized by existing technologies and will not be described in detail here.

[0033] The specific working process of this utility model:

[0034] After the drilling rig is used to dig a hole underground, the installed pipe well 3 is placed in the hole, and the pipe well 3 is connected to the heat pump unit 1 and the sand removal filter device 7 respectively. After the water pump 5 is started, the groundwater enters the water inlet chamber 31 through the filter screen 37 and the water inlet hole 33 in turn. The water pump 5 transports the groundwater in the water inlet chamber 31 to the sand removal filter device 7 for filtration, and then the groundwater enters the heat exchanger 2 for heat exchange. Finally, the water after heat exchange is transported to the heat pump unit 1 through the circulation pump 11 and finally used by the user end. The water after heat exchange in the heat exchanger 2 is pumped into the drainage chamber 32 through the return pipe 22. The water is discharged from the return pipe 22 of the drainage chamber 32 and discharged into the groundwater below the partition 4 after passing through the filter screen 37. Part of the discharged groundwater can also re-enter the water inlet chamber 31 through the water inlet hole on the upper part of the partition 4 after completing the heat exchange underground. Through the constant groundwater temperature, an efficient and energy-saving air-conditioning system that can provide both heating and cooling is completed. The system realizes the transfer of low-temperature heat energy to high-temperature heat energy by inputting a small amount of electric energy. The ground energy is used as a heat source for heat pump heating in winter and a cold source for air conditioning in summer. The working process and principle of the remaining structures in this embodiment are the same as those in the prior art and will not be described in detail here.

[0035] Since the water inlet chamber 31 and the drainage chamber 32 are provided in the pipe well 3, the water inlet pipe 21 of the heat exchanger 2 is connected to the water inlet chamber 31, and the water return pipe 22 is connected to the drainage chamber 32, the civil construction of the water-ground source heat pump system can be completed by burying the pipe well 3 once, and the structure of the water-ground source heat pump system is simpler, and the construction is more convenient and quicker;

[0036] The water inlet cavity 31 is provided with a plurality of water inlet holes 33, and the water discharge cavity 32 is provided with a plurality of water discharge holes 34. The groundwater source on the upper part of the partition 4 is transported to the heat exchanger 2 through the water inlet holes 33 by the water pump 5, and the water is discharged to the groundwater source under the partition 4 through the water discharge holes 34 to exchange heat with the groundwater. The partition 4 separates the water inlet and the water discharge. The water inlet holes 33 and the water discharge holes 34 are provided to make the heat exchange efficiency of the water-source heat pump system higher.

[0037] The water inlet pipe 21 and the water return pipe 22 are mutually connected closed pipes, which on the one hand avoid the pollution of groundwater, and on the other hand, because the water inlet and water return volumes of the heat exchanger 2 are the same, the drainage hole 34 is located below the water inlet hole 33, and part of the groundwater discharged from the drainage hole 34 can be discharged again through the water inlet hole 33 by the water pump 5, avoiding the groundwater loss caused by the groundwater discharged from the drainage hole 34 overflowing to the ground, and the applicability of the heat pump system is stronger.

[0038] Example 2: Based on Example 1, see Figure 4 A plurality of connecting pipes 6 are arranged in the water inlet cavity 31 , one end of the plurality of connecting pipes 6 passes through the partition plate 4 and is connected with the drainage cavity 32 , and the other ends of the plurality of connecting pipes 6 are connected with the return pipe 22 .

[0039] An upper sealing plate 8 and a lower sealing plate 9 are respectively provided in the water inlet chamber 31, and the other ends of several connecting pipes 6 are arranged through the lower sealing plate 9. The upper sealing plate 8 and the lower sealing plate 9 form a distribution chamber, and the return pipe 22 is connected to the distribution chamber. Specifically, incoming water can penetrate into the distribution chamber from the side of the pipe well 3, or can penetrate into the distribution chamber from the top cover 36 and the upper sealing plate 9 in turn. The water in the return pipe is distributed to the connecting pipe 6 through the distribution chamber, and then discharged from the connecting pipe 6 to the drainage chamber 32, and finally discharged to the groundwater under the partition 4 through the drainage hole 34.

[0040] Since a plurality of connecting pipes 6 are arranged in the water inlet chamber 31, one end of the connecting pipe 6 passes through the partition 4 and is connected with the drainage chamber 32, and the other end of the connecting pipe 6 is connected with the return pipe 22. By arranging the connecting pipe 6 in the water inlet chamber 31, damage to the return pipe 22 caused by stratum changes is avoided, making the buried construction of the pipe well 3 more convenient and safe, and the maintenance of the connecting pipe 6 is easier.

[0041] Technical features not described in the present invention can be achieved through or by adopting existing technologies, and will not be elaborated here. Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. A single-well hot water exchange ground source heat pump system, comprising a heat pump unit (1), one end of the heat pump unit (1) being connected to a user end, characterized in that: The other end of the heat pump unit (1) is connected to a heat exchanger (2) via a circulation pump (11), and the other end of the heat exchanger (2) is respectively provided with a water inlet pipe (21) and a water return pipe (22); It also comprises a pipe well (3) buried in the groundwater layer, wherein a partition (4) is arranged in the pipe well (3), and the partition (4) divides the pipe well (3) into a water inlet chamber (31) and a water discharge chamber (32); a side wall of the pipe well (3) is provided with a plurality of water inlet holes (33) connected to the water inlet chamber (31); a water pump (5) is arranged in the water inlet chamber (31), and a water outlet of the water pump (5) is connected to the water inlet pipe (21); a side wall of the pipe well (3) is provided with a plurality of water discharge holes (34) connected to the water discharge chamber (32); and the water return pipe (22) is connected to the water discharge chamber (32).

2. The single well water exchange ground source heat pump system according to claim 1, characterized in that: A bottom plate (35) is provided at the bottom end of the pipe well (3), and a top cover (36) is provided at the top end of the pipe well (3).

3. The single well water exchange ground source heat pump system according to claim 2, characterized in that: The water inlet pipe (21) is disposed through the top cover (36), and the water return pipe (22) penetrates the side wall of the pipe well (3) and is in communication with the drainage cavity (32).

4. The single-well hot water exchange ground source heat pump system according to claim 2, characterized in that: A plurality of connecting pipes (6) are arranged in the water inlet cavity (31), one end of each of the connecting pipes (6) passes through the partition plate (4) and is in communication with the water discharge cavity (32), and the other ends of each of the connecting pipes (6) are in communication with the water return pipe (22).

5. The single-well hot water exchange ground source heat pump system according to claim 1, characterized in that: The water inlet pipe (21) is provided with a sand removal and filtering device (7).

6. The single-well hot water exchange ground source heat pump system according to claim 2, characterized in that: The outer side of the water inlet hole (33) and the outer side of the drainage hole (34) are both covered with a filter screen (37).

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