An assembled buried pipe ground source heat pump system

Abstract

The present invention belongs to the technical field of ground source heat pumps and relates to an assembled buried pipe ground source heat pump system, which includes: a heated house, a ground source heat pump, and buried pipes. The buried pipes are composed of multiple buried modules that are exactly the same in shape and size and are stacked up and down, enabling the manufacturer to pre-produce standardized buried modules, and users only need to purchase different numbers of buried modules according to their respective different needs to meet the different heating requirements of different users. The present invention makes the production of buried pipes standardized and the use of the ground source heat pump system convenient, saves production and installation costs, reduces production and use prices, and is more conducive to the application and popularization of the ground source heat pump system.

Description

Technical Field

[0001] The present invention belongs to the technical field of ground source heat pumps and relates to an assembled buried pipe ground source heat pump system. Background Art

[0002] A ground source heat pump system is a closed-loop ground source heat pump system that utilizes the heat in underground rock and soil. It realizes heat transfer between the system and the ground by circulating liquid flowing in a closed underground buried pipe. Due to the energy-saving and environmental protection characteristics of the ground source heat pump, more and more units and families tend to use the ground source heat pump system for heating and cooling.

[0003] However, although different scales of residential and public buildings tend to use ground source heat pumps, the different heat demands lead to different heat supply demands for the buried pipes of the ground source heat pump. The existing production method of buried pipes is to produce them in the factory according to the design and then transport them to the site for in-well burial. Due to different user demands, it is necessary to produce one for each household, which in turn causes high production costs and transportation costs, seriously affecting the application and popularization of the ground source heat pump system. Therefore, an assembled, unified, and standard buried pipe is needed to meet the common use of users with different scales and different heating demands. Summary of the Invention

[0004] The technical solution adopted by the present invention to solve the technical problems is: an assembled buried pipe ground source heat pump system, including: a heated house, a ground source heat pump, and buried pipes. The buried pipes transfer the ground source heat energy to the heated house through the ground source heat pump for heating or cooling. The buried pipes in the geothermal well are composed of a plurality of identical buried modules stacked one above the other in sequence. The buried module is a cylindrical box body. Inside the box body of the buried module, there are a water inlet pipeline and a water return pipeline. The water inlet of the water inlet pipeline and the water outlet of the water return pipeline are respectively fixed upward on the upper surface of the box body of the buried module, and the water outlet of the water inlet pipeline and the water inlet of the water return pipeline are respectively fixed downward on the lower surface of the box body of the buried module. The advantage of stacking one above the other is that the number of buried modules needed can be selected according to the calculated heat supply demand of the user. Therefore, on the premise of pre-production in the factory, the buried modules can be selected for use at any time, or the manufacturer only produces a limited number of types and sizes of buried modules according to the demand size, and the user can select and use them according to the demand and the specific environment. Therefore, it makes production standardized, convenient to use, saves costs, reduces prices, and is more conducive to the application and popularization of the ground source heat pump system;

[0005] The water inlet of the water inlet pipe and the water outlet of the water return pipe are respectively in the shape of upward convex conical frustums with the same shape, equal size, and the same horizontal height. The water outlet of the water inlet pipe and the water inlet of the water return pipe are respectively in the shape of upward concave conical frustums with the same shape, equal size, and the same horizontal height. The convex conical frustum and the concave conical frustum have the same shape, equal size and are mutually matched; the convex conical frustum and the concave conical frustum are matched to facilitate the up-and-down docking during installation. Since the taper is the same, the accuracy and tightness of the docking are ensured, so that gluing or sealing is not required after docking, and more cumbersome docking and sealing operations in narrow and deep geothermal wells are avoided;

[0006] The water inlet of the water inlet pipe and the water outlet of the water inlet pipe are on the same vertical line of the same buried module. The water inlet of the water return pipe and the water outlet of the water return pipe are on the same vertical line of the same buried module; the box body of the buried module, the water inlet pipe and the water return pipe are all made of heat-conducting materials. The box body of the buried module is filled with phase change heat storage materials to fill the space between the outer walls of the water inlet pipe, the water return pipe and the inner wall of the box body;

[0007] When the buried modules are stacked one above the other in sequence, the water outlet of the water inlet pipe of the adjacent upper buried module is docked with the water inlet of the water inlet pipe of the adjacent lower buried module through the mutually matched concave conical frustum and convex conical frustum, and the water inlet of the water return pipe of the adjacent upper buried module is docked with the water outlet of the water return pipe of the adjacent lower buried module through the mutually matched concave conical frustum and convex conical frustum; the water outlet of the water inlet pipe of the lowermost buried module is docked with the water inlet of the water return pipe of the lowermost buried module through a return water docking pipe, and the water inlet of the water inlet pipe of the uppermost buried module and the water outlet of the water return pipe of the uppermost buried module are docked to the ground source heat pump.

[0008] Preferably, the water inlet pipe and the water return pipe are spirally and evenly distributed in the semi-cylinder of the buried module where their respective pipe orifices are located; the water inlet pipe and the water return pipe are each spirally distributed, so that the water inlet pipe and the water return pipe use the same type of parts, which can reduce production costs.

[0009] Preferably, the water inlet pipe is spirally and evenly distributed in the cylinder of the buried module and is close to the inner side wall of the buried module, and the water return pipe passes through the central axis of the cylinder of the buried module; the water inlet pipe is spirally arranged and distributed on the periphery with a better heat absorption and release effect, so that the water inlet pipe fully exchanges heat with the phase change heat storage materials near the outer periphery of the box body, and has a better geothermal utilization rate. The heat-conducting medium in the water return pipe has been fully heat-exchanged and can be used as long as it is returned to the ground source heat pump.

[0010] Preferably, a filling port is provided on the upper surface of the buried module, and a detachable upper cover is provided on the filling port; the filling port facilitates the filling of phase change heat storage materials in the factory or even on site, so it is more convenient.

[0011] Preferably, the water inlet of the water inlet pipeline and the water outlet of the water return pipeline are located on the same diameter of the upper surface of the buried module and are symmetrically distributed around the center of the circle; the water inlet of the water inlet pipeline and the water outlet of the water return pipeline are arranged opposite to each other, reducing the mutual heat absorption and release between the inlet water and the return water and affecting the efficiency of geothermal utilization.

[0012] Preferably, a lifting ring is pin-connected to the upper surface of the buried module, and the axis of the pin connection is located within the upper surface of the buried module; the lifting ring facilitates hoisting and alignment installation in the geothermal well.

[0013] Preferably, a protective sleeve is buckled from bottom to top at the bottom of the lowermost buried module to protect the water return pipe inside; the protective sleeve is used to protect the water return pipe to prevent damage to the water return pipe during the extrusion of the bottom layer and the burial process.

[0014] Preferably, the heating terminals in the heated house include: a convection radiator, a geothermal coil, and a capillary tube.

[0015] Preferably, a first valve is provided on the pipeline between the heated house and the ground source heat pump, a second valve is provided on the pipeline between the ground source heat pump and the buried pipe, and the ground source heat pump system further includes an air-cooled heat pump unit, and the air-cooled heat pump unit is connected to the pipeline between the heated house and the ground source heat pump after passing through a third valve; by controlling the opening and closing of the valves, different heating modes such as the ground source heat pump heating the heated house alone, the ground source heat pump and the air-cooled heat pump unit heating the heated house together, and the ground source heat pump heating the air-cooled heat pump unit alone can be controlled, so it has better adaptability.

[0016] Preferably, a rubber sealing ring is provided between the convex conical frustum and the concave conical frustum when they are butted up and down; the rubber sealing ring can prevent water leakage in case of improper butting between the concave conical frustum and the convex conical frustum.

[0017] The beneficial effects of the present invention are:

[0018] The present invention is composed of multiple buried modules with exactly the same shape and size stacked up and down, enabling the manufacturer to produce standardized buried modules in advance, and users only need to purchase different numbers of buried modules according to their respective different needs to meet the different heating requirements of different users. Therefore, the present invention makes the production of buried pipes standardized and the use of ground source heat pump systems convenient, saving production and installation costs, reducing production and use prices, and being more conducive to the application and popularization of ground source heat pump systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of an assembled buried pipe ground source heat pump system;

[0020] Figure 2It is a schematic diagram of the underground laying of buried pipes in a geothermal well;

[0021] Figure 3 is Figure 2 partial enlarged view in the direction A of;

[0022] Figure 4 It is a schematic diagram of the same mode of the water inlet pipeline and the water return pipeline;

[0023] Figure 5 It is a schematic diagram of different modes of the water inlet pipeline and the water return pipeline.

[0024] In the figure, 1, heated house; 2, ground source heat pump; 3, buried pipe; 4, geothermal well; 5, buried module; 6, water inlet pipeline; 7, water return pipeline; 8, convex frustum cone shape; 9, concave frustum cone shape; 10, phase change heat storage material; 11, return water docking pipe; 12, filling port; 13, upper cover; 14, lifting ring; 15, protective sleeve; 16, first valve; 17, second valve; 18, air-cooled heat pump unit; 19, third valve. Specific embodiments

[0025] Next, the relevant technologies in the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] Refer to Figures 1 to 5 , an assembled buried pipe ground source heat pump system, including: a heated house 1, a ground source heat pump 2, and a buried pipe 3. The buried pipe 3 transfers the geothermal energy to the heated house 1 through the ground source heat pump 2 for heating or cooling. The buried pipe 3 in the geothermal well 4 is composed of a plurality of identical buried modules 5 stacked one above the other in sequence. The buried module 5 is a cylindrical box body. Inside the box body of the buried module 5, there are a water inlet pipeline 6 and a water return pipeline 7. The water inlet of the water inlet pipeline 6 and the water outlet of the water return pipeline 7 are respectively fixed upward on the upper surface of the box body of the buried module 5, and the water outlet of the water inlet pipeline 6 and the water inlet of the water return pipeline 7 are respectively fixed downward on the lower surface of the box body of the buried module 5; The advantage of stacking one above the other is that the number of buried modules 5 required can be selected according to the calculated heat supply demand of the user. Therefore, on the premise of pre-production by the manufacturer, the buried modules 5 can be selected for use at any time, or the manufacturer only produces a limited number of types and sizes of buried modules 5 according to the size of the demand. The user can select and use according to the demand and the specific environment. Therefore, it makes the production standardized, the use convenient, saves costs, reduces prices, and is more conducive to the application and popularization of the ground source heat pump system;

[0027] The water inlet of the water inlet pipe 6 and the water outlet of the water return pipe 7 are respectively in the shape of a convex conical frustum 8 that is upwardly convex, with the same shape, equal size, and the same horizontal height. The water outlet of the water inlet pipe 6 and the water inlet of the water return pipe 7 are respectively in the shape of a concave conical frustum 9 that is upwardly concave, with the same shape, equal size, and the same horizontal height. The convex conical frustum 8 and the concave conical frustum 9 have the same shape, equal size and are mutually matched; the cooperation of the convex conical frustum 8 and the concave conical frustum 9 facilitates the up-and-down docking during installation. Since the taper is the same, the accuracy and sealing performance of the docking are ensured, so that the docking is free from gluing or sealing, and the more cumbersome docking and sealing operations in the narrow and deep geothermal well 4 are avoided;

[0028] The water inlet of the water inlet pipe 6 and the water outlet of the water inlet pipe 6 are on the same vertical line of the same buried module 5. The water inlet of the water return pipe 7 and the water outlet of the water return pipe 7 are on the same vertical line of the same buried module 5; the box body of the buried module 5, the water inlet pipe 6, and the water return pipe 7 are all made of heat-conducting materials. The box body of the buried module 5 is filled with a phase change heat storage material 10 to fill the space between the outer walls of the water inlet pipe 6, the water return pipe 7 and the inner wall of the box body;

[0029] When the buried modules 5 are stacked one above the other in sequence, the water outlet of the water inlet pipe 6 of the adjacent upper buried module 5 is docked with the water inlet of the water inlet pipe 6 of the adjacent lower buried module 5 through the mutually matched concave conical frustum 9 and convex conical frustum 8. The water inlet of the water return pipe 7 of the adjacent upper buried module 5 is docked with the water outlet of the water return pipe 7 of the adjacent lower buried module 5 through the mutually matched concave conical frustum 9 and convex conical frustum 8; the water outlet of the water inlet pipe 6 of the lowermost buried module 5 is docked with the water inlet of the water return pipe 7 of the lowermost buried module 5 through a return water connection pipe 11. The water inlet of the water inlet pipe 6 of the uppermost buried module 5 and the water outlet of the water return pipe 7 of the uppermost buried module 5 are docked to the ground source heat pump 2.

[0030] Further, the water inlet pipe 6 and the water return pipe 7 are spirally and evenly distributed in the semi-cylinder of the buried module 5 where their respective pipe orifices are located; the spiral distribution of the water inlet pipe 6 and the water return pipe 7 respectively enables the water inlet pipe 6 and the water return pipe 7 to use the same type of components, which can reduce production costs.

[0031] Further, the water inlet pipe 6 is spirally and evenly distributed in the cylinder of the buried module 5 and is close to the inner side wall of the buried module 5, and the water return pipe 7 passes through the central axis of the cylinder of the buried module 5; the water inlet pipe 6 is spirally arranged and distributed on the periphery, which has a better heat absorption and release effect, enabling the water inlet pipe 6 to fully exchange heat with the phase change heat storage material 10 near the outer periphery of the box body, and having a better geothermal utilization rate. The heat-conducting medium in the water return pipe 7 has already undergone sufficient heat exchange and only needs to be returned to the ground source heat pump 2 for use.

[0032] Furthermore, a filling port 12 is provided on the upper surface of the buried module 5, and a detachable upper cover 13 is provided on the filling port 12; the filling port 12 facilitates the filling of the phase change heat storage material 10 in the factory or even on site, thus being more convenient.

[0033] Furthermore, the water inlet of the water inlet pipeline 6 and the water outlet of the water return pipeline 7 are located on the same diameter of the upper surface of the buried module 5 and are symmetrically distributed around the center of the circle; the water inlet of the water inlet pipeline 6 and the water outlet of the water return pipeline 7 are arranged opposite to each other, reducing the mutual heat absorption and release between the inlet water and the return water and affecting the efficiency of geothermal utilization.

[0034] Furthermore, a lifting ring 14 is pin-connected to the upper surface of the buried module 5, and the axis of the pin connection is located within the upper surface of the buried module 5; the lifting ring 14 facilitates hoisting and alignment installation in the geothermal well 4.

[0035] Furthermore, a protective sleeve 15 is buckled from bottom to top at the bottom of the lowermost buried module 5 to protect the return water connection pipe 11 therein; the protective sleeve 15 is used to protect the return water connection pipe 11 to prevent damage to the return water connection pipe 11 during the extrusion of the lowermost layer and the burying process.

[0036] Furthermore, the heated ends in the heated house 1 include: a convection radiator, a geothermal coil, and a capillary tube.

[0037] Furthermore, a first valve 16 is provided on the pipeline between the heated house 1 and the ground source heat pump 2, a second valve 17 is provided on the pipeline between the ground source heat pump 2 and the ground heat exchanger 3, and the ground source heat pump system further includes an air-cooled heat pump unit 18, and the air-cooled heat pump unit 18 is connected to the pipeline between the heated house 1 and the ground source heat pump 2 after passing through a third valve 19; by controlling the opening and closing of the valves, different heating modes such as the ground source heat pump 2 independently heating the heated house 1, the ground source heat pump 2 and the air-cooled heat pump unit 18 jointly heating the heated house 1, and the ground source heat pump 2 independently heating the air-cooled heat pump unit 18 can be controlled, so it has better adaptability.

[0038] Furthermore, a rubber sealing ring is provided between the convex conical frustum 8 and the concave conical frustum 9 when they are docked up and down; the rubber sealing ring can prevent water leakage in case of improper docking between the concave conical frustum 9 and the convex conical frustum 8.

[0039] In summary, the present invention is composed of splitting the buried pipes into multiple buried modules with exactly the same shape and size and stacking them up and down, enabling the manufacturer to pre-produce standardized buried modules, and users only need to purchase different quantities of buried modules according to their respective different needs to meet the different heating requirements of different users. The present invention standardizes the production of buried pipes, facilitates the use of the ground source heat pump system, saves the production and installation costs, reduces the production and use prices, and is more conducive to the application and popularization of the ground source heat pump system. Therefore, the present invention has a broad application prospect.

[0040] It should be emphasized that the above are only the preferred embodiments of the present invention, and there is no any form of limitation to the present invention. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An assembled buried pipe ground source heat pump system, comprising: A heated house (1), a ground source heat pump (2), and a buried pipe (3). The buried pipe (3) transfers the ground source heat energy to the heated house (1) through the ground source heat pump (2) for heating or cooling. It is characterized in that the buried pipe (3) in the geothermal well (4) is composed of a plurality of identical buried modules (5) stacked vertically in sequence. The buried module (5) is a cylindrical box body. Inside the box body of the buried module (5), there are a water inlet pipe (6) and a water return pipe (7). The water inlet of the water inlet pipe (6) and the water outlet of the water return pipe (7) are respectively fixed upward on the upper surface of the box body of the buried module (5) with the water outlets facing up. The water outlet of the water inlet pipe (6) and the water inlet of the water return pipe (7) are respectively fixed downward on the lower surface of the box body of the buried module (5) with the water outlets facing down; The water inlet of the water inlet pipe (6) and the water outlet of the water return pipe (7) are respectively in the shape of upward convex conical frustums (8) with the same shape, the same size, and the same horizontal height. The water outlet of the water inlet pipe (6) and the water inlet of the water return pipe (7) are respectively in the shape of upward concave conical frustums (9) with the same shape, the same size, and the same horizontal height. The convex conical frustum (8) and the concave conical frustum (9) have the same shape, the same size, and are mutually matched; The water inlet of the water inlet pipe (6) and the water outlet of the water inlet pipe (6) are on the same vertical line of the same buried module (5). The water inlet of the water return pipe (7) and the water outlet of the water return pipe (7) are on the same vertical line of the same buried module (5); The box body of the buried module (5), the water inlet pipe (6), and the water return pipe (7) are all made of heat-conducting materials. The box body of the buried module (5) is filled with a phase change heat storage material (10) to fill the space between the outer walls of the water inlet pipe (6), the outer wall of the water return pipe (7), and the inner wall of the box body; When the buried modules (5) are stacked vertically in sequence, the water outlet of the water inlet pipe (6) of the adjacent upper buried module (5) is docked with the water inlet of the water inlet pipe (6) of the adjacent lower buried module (5) through the mutually matched concave conical frustum (9) and convex conical frustum (8). The water inlet of the water return pipe (7) of the adjacent upper buried module (5) is docked with the water outlet of the water return pipe (7) of the adjacent lower buried module (5) through the mutually matched concave conical frustum (9) and convex conical frustum (8). The water outlet of the water inlet pipe (6) of the lowermost buried module (5) is docked with the water inlet of the water return pipe (7) of the lowermost buried module (5) through a water return docking pipe (11). The water inlet of the water inlet pipe (6) of the uppermost buried module (5) and the water outlet of the water return pipe (7) of the uppermost buried module (5) are docked to the ground source heat pump (2).

2. The assembled buried tube ground source heat pump system according to claim 1, wherein, The water inlet pipe (6) and the water return pipe (7) are spirally and evenly distributed in the semi-cylinder of the buried module (5) where their respective pipe orifices are located.

3. An assembled buried pipe ground source heat pump system according to claim 1, characterized in that, The water inlet pipe (6) is spirally and evenly distributed in the cylinder of the buried module (5) and is close to the inner side wall of the buried module (5). The water return pipe (7) passes through the central axis of the cylinder of the buried module (5).

4. A prefabricated buried pipe ground source heat pump system according to claim 1, characterized in that, The upper surface of the buried module (5) is provided with a filling port (12), and a detachable upper cover (13) is provided on the filling port (12).

5. A prefabricated buried pipe ground source heat pump system according to claim 1, characterized in that, The water inlet of the water inlet pipeline (6) and the water outlet of the water return pipeline (7) are located on the same diameter of the upper surface of the buried module (5) and are symmetrically distributed around the center of the circle.

6. A prefabricated buried pipe ground source heat pump system according to claim 1, characterized in that, A lifting ring (14) is pin-connected to the upper surface of the buried module (5), and the axis of the pin connection is located within the upper surface of the buried module (5).

7. The assembled buried pipe ground source heat pump system according to claim 1, characterized in that, A protective sleeve (15) is buckled from bottom to top at the bottom of the lowermost buried module (5) to protect the return water docking pipe (11) therein.

8. The assembled buried pipe ground source heat pump system according to claim 1, wherein, The heat receiving ends in the heat receiving house (1) include: a convection radiator, a geothermal coil, and a capillary tube.

9. The assembled buried pipe ground source heat pump system according to claim 1, wherein, A first valve (16) is provided on the pipeline between the heat receiving house (1) and the ground source heat pump (2), a second valve (17) is provided on the pipeline between the ground source heat pump (2) and the ground buried pipe (3), the ground source heat pump system further includes an air-cooled heat pump unit (18), and the air-cooled heat pump unit (18) is connected to the pipeline between the heat receiving house (1) and the ground source heat pump (2) through a third valve (19).

10. The assembled buried pipe ground source heat pump system according to claim 1, characterized in that, When the convex frustum (8) and the concave frustum (9) are docked up and down, a rubber sealing ring is provided in the middle.

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