Pipe-in-pipe type ground source heat pump system

Abstract

The utility model provides a pipe-in-pipe type ground source heat pump system, relates to the ground source heat pump field, the pipe-in-pipe type ground source heat pump system comprises an outer pipe, an inner pipe, a diversion device and a plurality of flow choking devices, the inner side of the outer pipe is coaxially provided with the inner pipe, the outer pipe and the inner pipe are connected through a plurality of reinforcing ribs, the diversion device is installed on the outer pipe and the inner pipe, and the flow choking devices are installed on the outer pipe and the inner pipe. According to the pipe-in-pipe type ground source heat pump system, the first spoiler and the second spoiler are continuously impacted by liquid, so that the purpose of reducing the speed of the liquid when the liquid moves downwards is achieved; and the staying time of the liquid in the gap between the outer pipe and the inner pipe is prolonged, heat exchange between the liquid in the gap between the outer pipe and the inner pipe and the outside of the outer pipe is facilitated, heat transfer is facilitated, and the heat dissipation effect is improved to a certain extent.

Description

Technical Field

[0001] The utility model relates to the field of ground source heat pumps, in particular to a pipe-in-pipe type ground source heat pump system. Background Art

[0002] Geothermal heat pump system, also known as ground source heat pump, uses ground source energy (soil, groundwater, surface water, low-temperature geothermal water and tail water) as the cooling source for heat pump cooling in summer and the low-temperature heat source for heating in winter. It is also a system that realizes heating, cooling and domestic hot water.

[0003] It is used to replace the traditional mode of using refrigerators and boilers for air conditioning, heating and heat supply. It is an effective way to improve the urban atmospheric environment and save energy. It is also a new development direction for the utilization of domestic ground source energy.

[0004] When the existing geothermal heat pump is in use, in order to reduce the diameter of the well, reduce the energy consumption of the well, and improve the utilization rate of the well, the pipeline is generally designed to be a pipe-in-pipe type, wherein the inner cavity cross-sectional area of ​​the outer pipe is large, and the inner cavity cross-sectional area of ​​the inner pipe is small. When the pipe-in-pipe with this structure is in use, the liquid moves downward from the gap between the outer pipe and the inner pipe. In this process, heat can be dissipated. When the liquid flows to the lowest end, the liquid flows out of the inner pipe, and energy is transmitted under the action of the guide device. However, when the pipe-in-pipe with this structure is in use, since the liquid relies on its own gravity and water pressure to move faster when moving downward from the gap between the outer pipe and the inner pipe, the liquid stays in the gap between the outer pipe and the inner pipe for a shorter time, so there is a problem of poor heat dissipation effect.

[0005] Therefore, it is necessary to provide a new tube-in-tube ground source heat pump system to solve the above technical problems. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a pipe-in-pipe ground source heat pump system.

[0007] The tube-in-tube ground source heat pump system provided by the utility model comprises an outer tube, an inner tube, a flow guide device and a plurality of flow blocking devices, the inner tube is coaxially arranged inside the outer tube, the outer tube and the inner tube are connected by a plurality of reinforcing ribs, the flow guide device is installed on the outer tube and the inner tube, and the plurality of flow blocking devices are respectively installed at a plurality of gaps formed by the outer tube, the inner tube and the plurality of reinforcing ribs;

[0008] The baffle device includes a mounting frame, which is fixedly mounted on the outer tube and the inner tube, and two sides of the mounting frame are in contact with two adjacent reinforcing ribs, and the mounting frame is fixedly connected to the inner wall of the inner tube close to multiple rows of first baffles, and the mounting frame is fixedly connected to the inner wall of the outer tube close to multiple rows of second baffles, and the bottom ends of the first baffles and the second baffles are both upward arc-shaped portions.

[0009] Preferably, the ends of the first spoiler plate and the second spoiler plate away from the inner wall of the mounting frame are both arranged to be inclined upward.

[0010] Preferably, multiple first spoilers in two adjacent rows of first spoilers are staggered, multiple second spoilers in two adjacent rows of second spoilers are staggered, and multiple rows of first spoilers and multiple rows of second spoilers on the mounting frame are staggered in the vertical direction.

[0011] Preferably, the bottom of the outer tube is connected to a bottom cone via a snap-fit ​​device, a sealing gasket is fixedly installed on the top of the bottom cone, and the inner cavity of the bottom cone is connected to the inner cavity of the outer tube and the inner cavity of the inner tube.

[0012] Preferably, the snap-fit ​​device includes a connecting frame, a first ring and a plurality of movable components, the connecting frame is fixedly sleeved on the outer tube, the connecting frame is threadedly sleeved with the first ring, and the connecting frame is movably sleeved with the second ring, the first ring is movably connected to the second ring, the bottom of the second ring is fixedly connected with a plurality of inclined blocks 1, the plurality of movable components are respectively movably arranged in a plurality of through holes opened in the connecting frame, and the plurality of inclined blocks 1 are arranged corresponding to the plurality of movable components.

[0013] Preferably, a connecting block is fixedly connected to the inner wall of the second ring, and one end of the connecting block away from the second ring is movably arranged in a groove formed on the outer surface of the connecting frame.

[0014] Preferably, the movable component includes an inclined block 2 and an elastic member, the inclined block 2 is movably inserted into a through hole opened in the connecting frame, the inclined surface of the inclined block 2 fits with the inclined surface of the inclined block 1, and the elastic member is connected to the inclined block 2.

[0015] Preferably, the elastic member includes a top plate and a spring, the bottom of the top plate is fixedly connected to the top of the second inclined block, and the two ends of the spring are respectively fixedly connected to the inner wall of the connecting frame and the side wall of the top plate.

[0016] Preferably, a heat-insulating plate is fixedly connected to the inner wall of the inner tube, and the heat-insulating plate has an internal vacuum structure.

[0017] Preferably, the flow guiding device includes a port, a heat exchanger and a compressor, the port is connected to the outer tube, the port is connected to the output end of the pump, the first outlet of the heat exchanger is connected to the pump, the first inlet of the heat exchanger is connected to the inner tube, and the second inlet of the heat exchanger is connected to the output end of the compressor.

[0018] Compared with the related art, the pipe-in-pipe ground source heat pump system provided by the utility model has the following beneficial effects:

[0019] When the liquid enters the gap between the outer tube, the inner tube and the plurality of connecting ribs, the liquid will hit the first baffle and the second baffle when flowing downward, thereby achieving the effect of flow blocking and reducing the flow speed of the fluid. In addition, in the present device, the plurality of first baffles in two adjacent rows of first baffles are staggered, and the plurality of second baffles in two adjacent rows of second baffles are staggered. Therefore, after the liquid hits the first baffle, it continues to move downward after slowing down, and hits the first baffle in the next row when moving downward. Similarly, after the liquid hits the second baffle, it continues to move downward after slowing down, and hits the second baffle in the next row when moving downward, thereby achieving the purpose of continuous deceleration. Through the continuous impact of the liquid, the present device prolongs the time that the liquid stays in the gap between the outer tube and the inner tube, which facilitates the heat exchange between the liquid in the gap between the outer tube and the inner tube and the outside of the outer tube, facilitates the heat transfer, and improves the heat dissipation effect to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of a tube-in-tube ground source heat pump system provided by the utility model;

[0021] Figure 2 for Figure 1 A schematic diagram of a partial top view of the structure shown;

[0022] Figure 3 for Figure 2 The structural schematic diagram of the flow blocking device shown;

[0023] Figure 4 for Figure 3 A schematic structural diagram of a partial side view of the flow blocking device shown;

[0024] Figure 5 for Figure 1 A schematic cross-sectional view of the structure shown;

[0025] Figure 6 for Figure 5 The structural schematic diagram of A shown;

[0026] Figure 7 for Figure 3 A schematic structural diagram of the first spoiler is shown.

[0027] Numbers in the figure: 1. outer tube; 2. inner tube; 3. connecting rib; 4. mounting frame; 5. first spoiler; 6. second spoiler; 7. arc-shaped portion; 8. insulation plate; 9. connecting frame; 10. first ring; 11. second ring; 12. connecting block; 13. inclined block one; 14. inclined block two; 15. spring; 16. top plate; 17. bottom cone; 18. port; 19. pump; 20. heat exchanger; 21. first outlet; 22. first inlet; 23. second inlet; 24. compressor; 25. sealing gasket. DETAILED DESCRIPTION

[0028] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0029] Please refer to Figure 1-Figure 7 ,in, Figure 1 A schematic diagram of the structure of a tube-in-tube ground source heat pump system provided by the utility model; Figure 2 for Figure 1 A schematic diagram of a partial top view of the structure shown; Figure 3 for Figure 2 The structural schematic diagram of the flow blocking device shown; Figure 4 for Figure 3 A schematic structural diagram of a partial side view of the flow blocking device shown; Figure 5 for Figure 1 A schematic cross-sectional view of the structure shown; Figure 6 for Figure 5 The structural schematic diagram of A shown; Figure 7 for Figure 3 A schematic structural diagram of the first spoiler is shown.

[0030] In the specific implementation process, Figure 1-Figure 7As shown, it includes an outer tube 1, an inner tube 2, a flow guide device and a plurality of flow blocking devices. The inner tube 2 is coaxially arranged inside the outer tube 1. The outer tube 1 and the inner tube 2 are connected by a plurality of reinforcing ribs. The flow guide device is installed on the outer tube 1 and the inner tube 2. The plurality of flow blocking devices are respectively installed at a plurality of gaps formed by the outer tube 1, the inner tube 2 and the plurality of reinforcing ribs. The flow blocking device includes a mounting frame 4. The mounting frame 4 is fixedly installed on the outer tube 1 and the inner tube 2, and the two sides of the mounting frame 4 are in contact with two adjacent reinforcing ribs. The mounting frame 4 is fixedly connected to the inner wall of the inner tube 2. A plurality of rows of first spoilers 5 are fixedly connected to the inner wall of the mounting frame 4 close to the outer tube 1, and the bottom ends of the first spoilers 5 and the second spoilers 6 are both upward arc-shaped portions 7, and the ends of the first spoilers 5 and the second spoilers 6 away from the inner wall of the mounting frame 4 are both arranged in an upward inclination, and the plurality of first spoilers 5 in the two adjacent rows of first spoilers 5 are arranged in a staggered manner, and the plurality of second spoilers 6 in the two adjacent rows of second spoilers 6 are arranged in a staggered manner, and the plurality of rows of first spoilers 5 and the plurality of rows of second spoilers 6 on the mounting frame 4 are arranged in a vertical direction. The inner wall of the inner tube 2 is fixedly connected with an insulation board 8, and the insulation board 8 is an internal vacuum structure. When the liquid enters the gap between the outer tube 1, the inner tube 2 and the plurality of connecting ribs 3, it will hit the first baffle 5 and the second baffle 6 when the liquid flows downward, thereby achieving the effect of blocking the flow and reducing the flow speed of the fluid. In addition, in the device, the plurality of first baffles 5 in the two adjacent rows of first baffles 5 are staggered, and the plurality of second baffles 6 in the two adjacent rows of second baffles 6 are staggered, so the liquid hits After the liquid hits the first baffle plate 5, it continues to move downward after slowing down, and hits the first baffle plate 5 in the next row when moving downward. Similarly, after the liquid hits the second baffle plate 6, it continues to move downward after slowing down, and hits the second baffle plate 6 in the next row when moving downward, so as to achieve the purpose of continuous deceleration. The device prolongs the time that the liquid stays in the gap between the outer tube 1 and the inner tube 2 through the continuous impact of the liquid, so that the liquid in the gap between the outer tube 1 and the inner tube 2 can exchange heat with the outside of the outer tube 1, which is convenient for heat transfer and improves the heat dissipation effect to a certain extent.

[0031] The bottom of the outer tube 1 is connected with a bottom cone 17 through a snap-fit ​​device, and a sealing gasket 25 is fixedly installed on the top of the bottom cone 17. The sealing gasket 25 can be made of rubber material. The bottom cone 17 can also be fixedly connected to the outer tube 1, and the specific method can be selected according to the specific usage. The inner cavity of the bottom cone 17 is connected with the inner cavity of the outer tube 1 and the inner cavity of the inner tube 2. The snap-fit ​​device includes a connecting frame 9, a first sleeve 10 and a plurality of movable components. The connecting frame 9 is fixedly sleeved on the outer tube 1, and the first sleeve 10 is threadedly sleeved on the connecting frame 9, and the second sleeve 11 is movably sleeved on the connecting frame 9. The first sleeve 10 is rotatably connected to the second sleeve 11, and the bottom of the second sleeve 11 is fixedly connected with a plurality of inclined blocks 13, and the plurality of movable components are respectively movably arranged in the plurality of through holes opened in the connecting frame 9. The plurality of inclined blocks 13 are arranged correspondingly to the plurality of movable components. A connecting block 12 is connected, and one end of the connecting block 12 away from the second ring 11 is movably arranged in a groove provided on the outer surface of the connecting frame 9. The movable component includes an inclined block 2 14 and an elastic member. The inclined block 2 14 is movably inserted into the through hole provided in the connecting frame 9. The inclined surface of the inclined block 2 14 fits the inclined surface of the inclined block 1 13. The elastic member is connected to the inclined block 2 14. The elastic member includes a top plate 16 and a spring 15. The bottom of the top plate 16 is fixedly connected to the top of the inclined block 2 14. The two ends of the spring 15 are respectively fixedly connected to the inner wall of the connecting frame 9 and the side wall of the top plate 16. When the bottom cone 17 is disassembled, the first ring 10 can be rotated, and the first ring 10 moves upward while rotating, thereby driving the inclined block 1 13 to move upward through the second ring 11. The inclined block 2 14 moves in a direction away from the bottom cone 17 under the action of the spring 15, so as to facilitate the disassembly of the bottom cone 17.

[0032] The flow guide device includes a port 18, a heat exchanger 20 and a compressor 24. The port is connected to the outer pipe 1, and the port is connected to the output end of the pump 19. The first outlet 21 of the heat exchanger 20 is connected to the pump 19, the first inlet 22 of the heat exchanger 20 is connected to the inner pipe 2, and the second inlet 23 of the heat exchanger 20 is connected to the output end of the compressor 24. The heat exchanger 20 plays a key role in the ground source heat pump system and is mainly responsible for the transfer of heat. The pump 19 is responsible for promoting the circulation of liquid in the pipeline in the ground source heat pump system. The operation of the compressor 24 enables the liquid to circulate, thereby realizing continuous transfer and conversion of heat. The conduction here is the conventional existing technology of the ground source heat pump, and no excessive elaboration will be given here.

[0033] The working principle of the utility model is as follows: when the device is used, the liquid enters the gap between the outer tube 1, the inner tube 2 and the plurality of connecting ribs 3, and when the liquid flows downward, it will hit the first baffle plate 5 and the second baffle plate 6, thereby achieving the effect of blocking the flow, so that the flow speed of the fluid is reduced. In addition, in the device, the plurality of first baffle plates 5 in the two adjacent rows of first baffle plates 5 are staggered, and the plurality of second baffle plates 6 in the two adjacent rows of second baffle plates 6 are staggered. Therefore, after the liquid hits the first baffle plate 5, it slows down and continues to move downward. When moving downward, it will hit the first baffle plate 5 in the next row. Similarly, it can be known that the liquid hits the first baffle plate 5. After hitting the second spoiler 6, it continues to move downward after slowing down, and will hit the second spoiler 6 in the next row when moving downward, so as to achieve the purpose of continuous deceleration. In addition, the bottom ends of the first spoiler 5 and the second spoiler 6 are both upward arc-shaped parts, so the flowing liquid is easy to form a vortex at the bottom ends of the first spoiler 5 and the second spoiler 6, so that the speed is further reduced. Through the continuous impact of the liquid speed, the time that the liquid stays in the gap between the outer tube 1 and the inner tube 2 is prolonged, which is convenient for the liquid in the gap between the outer tube 1 and the inner tube 2 to exchange heat with the outside of the outer tube 1, which is convenient for heat transfer and, to a certain extent, improves the heat dissipation effect.

[0034] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0035] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A pipe-in-pipe ground source heat pump system, characterized in that: The invention comprises an outer tube (1), an inner tube (2), a flow guide device and a plurality of flow blocking devices, wherein the inner tube (2) is coaxially arranged inside the outer tube (1), the outer tube (1) and the inner tube (2) are connected via a plurality of reinforcing ribs, the flow guide device is installed on the outer tube (1) and the inner tube (2), and the plurality of flow blocking devices are respectively installed at a plurality of gaps formed by the outer tube (1), the inner tube (2) and the plurality of reinforcing ribs; The flow-blocking device comprises a mounting frame (4), wherein the mounting frame (4) is fixedly mounted on the outer tube (1) and the inner tube (2), and two sides of the mounting frame (4) are in contact with two adjacent reinforcing ribs, a plurality of rows of first flow-blocking plates (5) are fixedly connected to the inner wall of the mounting frame (4) close to the inner tube (2), and a plurality of rows of second flow-blocking plates (6) are fixedly connected to the inner wall of the mounting frame (4) close to the outer tube (1), and the bottom ends of the first flow-blocking plates (5) and the bottom ends of the second flow-blocking plates (6) are both upwardly curved portions (7).

2. The pipe-in-pipe ground source heat pump system according to claim 1, characterized in that: The ends of the first spoiler plate (5) and the second spoiler plate (6) away from the inner wall of the mounting frame (4) are both arranged to be inclined upward.

3. The pipe-in-pipe ground source heat pump system according to claim 2, characterized in that: The plurality of first spoiler plates (5) in two adjacent rows of first spoiler plates (5) are arranged in a staggered manner, the plurality of second spoiler plates (6) in two adjacent rows of second spoiler plates (6) are arranged in a staggered manner, and the plurality of rows of first spoiler plates (5) and the plurality of rows of second spoiler plates (6) on the mounting frame (4) are arranged in a staggered manner in the vertical direction.

4. The pipe-in-pipe ground source heat pump system according to claim 1, characterized in that: The bottom of the outer tube (1) is connected to a bottom cone (17) via a snap-fit ​​device, a sealing gasket (25) is fixedly mounted on the top of the bottom cone (17), and the inner cavity of the bottom cone (17) is in communication with the inner cavity of the outer tube (1) and the inner cavity of the inner tube (2).

5. The pipe-in-pipe ground source heat pump system according to claim 4, characterized in that: The buckle device comprises a connecting frame (9), a first sleeve ring (10) and a plurality of movable components, wherein the connecting frame (9) is fixedly sleeved on the outer tube (1), the first sleeve ring (10) is threadedly sleeved on the connecting frame (9), and a second sleeve ring (11) is movably sleeved on the connecting frame (9), the first sleeve ring (10) and the second sleeve ring (11) are movably connected, a plurality of inclined blocks (13) are fixedly connected to the bottom of the second sleeve ring (11), and the plurality of movable components are movably arranged in a plurality of through holes opened in the connecting frame (9), and the plurality of inclined blocks (13) are arranged correspondingly to the plurality of movable components.

6. The pipe-in-pipe ground source heat pump system according to claim 5, characterized in that: A connecting block (12) is fixedly connected to the inner wall of the second sleeve ring (11), and one end of the connecting block (12) away from the second sleeve ring (11) is movably arranged in a groove formed on the outer surface of the connecting frame (9).

7. The pipe-in-pipe ground source heat pump system according to claim 6, characterized in that: The movable assembly comprises a second inclined block (14) and an elastic member. The second inclined block (14) is movably inserted into a through hole provided in the connecting frame (9). The inclined surface of the second inclined block (14) fits the inclined surface of the first inclined block (13). The elastic member is connected to the second inclined block (14).

8. The pipe-in-pipe ground source heat pump system according to claim 7, characterized in that: The elastic member comprises a top plate (16) and a spring (15); the bottom of the top plate (16) is fixedly connected to the top of the second inclined block (14); and the two ends of the spring (15) are respectively fixedly connected to the inner wall of the connecting frame (9) and the side wall of the top plate (16).

9. The pipe-in-pipe ground source heat pump system according to claim 1, characterized in that: A heat preservation plate (8) is fixedly connected to the inner wall of the inner tube (2), and the heat preservation plate (8) has an internal vacuum structure.

10. The pipe-in-pipe ground source heat pump system according to claim 1, characterized in that: The flow guiding device comprises a port (18), a heat exchanger (20) and a compressor (24); the port (18) is connected to the outer tube (1), the port (18) is connected to the output end of a pump (19), a first outlet (21) of the heat exchanger (20) is connected to the pump (19), a first inlet (22) of the heat exchanger (20) is connected to the inner tube (2), and a second inlet (23) of the heat exchanger (20) is connected to the output end of the compressor (24).

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