Geothermal upper protection heat exchange unit and geothermal exchange water flow structure comprising same

Abstract

According to the upper protection heat exchange unit for terrestrial heat and the terrestrial heat exchange water flow structure comprising the same, the upper protection heat exchange unit for terrestrial heat comprises an upper protection hole shell component, a pumping pipeline component and an upper protection hole detachable cover component, the pumping conduit member is connected to the upper protective hole removable cover member and a deep well pump is connected to the pumping conduit member such that when the upper protective hole removable cover member is separated from the upper protective hole housing member, the deep well pump is connected to the pumping conduit member. The pumping pipe member connected with the upper protection hole detachable cover member and the deep well pump connected with the pumping pipe member can be integrally separated from the upper protection hole shell member together with the upper protection hole detachable cover member. Therefore, the deep-well pump has the advantage that the deep-well pump can be easily accessed to replace and maintain the deep-well pump installed inside the underground well.

Description

Technical Field

[0001] The invention relates to a geothermal upper protection heat exchange unit and a geothermal heat exchange water flow structure comprising the geothermal upper protection heat exchange unit. Background Art

[0002] In a geothermal heat exchange system that uses geothermal heat to provide heating, cooling, hot water, and the like to a demand source, an upper protection hole for geothermal heat is protrudingly provided above an underground well formed underground.

[0003] As an example of such an upper protection hole for geothermal heat, Korean Patent No. 10-1238454 (registration date: February 22, 2013, invention title: Sealed upper protection hole return cap device for open underground heat exchanger) and the like can be cited.

[0004] However, according to the existing geothermal upper protection hole, when trying to access the deep well pump to replace or repair the deep well pump installed in the underground well, the entire geothermal upper protection hole must be disassembled to access the deep well pump. Therefore, there is a problem of difficulty in accessing the deep well pump.

[0005] Furthermore, in the existing geothermal heat exchange system, no solution has been proposed for treating the geothermal heat exchange water when overflow occurs in one of the plurality of underground wells when the geothermal heat exchange water flows through the plurality of underground wells drilled.

[0006] In addition, in the existing geothermal heat exchange system, when a plurality of underground wells are installed, each of the underground wells must be connected to a supply header or a return header. Therefore, there is a problem that not only the pipelines for connecting each underground well and the supply header or the return header become complicated, but also a large amount of construction costs are required. Summary of the invention

[0007] Technical issues

[0008] An object of the present invention is to provide a geothermal upper protection heat exchange unit and a geothermal exchange water flow structure including the geothermal upper protection heat exchange unit, which is easy to access a deep well pump to replace or repair the deep well pump set in an underground well.

[0009] Another object of the present invention is to provide an upper protective heat exchange unit for geothermal energy, and a geothermal exchange water flow structure including the upper protective heat exchange unit for geothermal energy, which allows geothermal exchange water seeping from at least one of the multiple underground wells to flow to other underground wells among the multiple underground wells.

[0010] Another object of the present invention is to provide a geothermal upper protection heat exchange unit and a geothermal exchange water flow structure including the geothermal upper protection heat exchange unit, which forms a natural water level difference of groundwater in each underground well by adjusting the return amount of geothermal exchange water returning to each of the multiple underground wells, thereby generating seepage in a part of each underground well and recharge in other parts of each underground well, thereby activating the flow of underground aquifers and improving the heat exchange efficiency of each underground well without discharging groundwater.

[0011] Another object of the present invention is to provide a geothermal upper protection heat exchange unit and a geothermal exchange water flow structure including the geothermal upper protection heat exchange unit, which can connect multiple underground wells to the supply header or return header through a simple structure.

[0012] Means of solving the problem

[0013] According to one aspect of the present invention, an upper protection heat exchange unit for geothermal energy includes: an upper protection hole shell member, which is installed on an underground well formed underground and its upper part is exposed to the ground; a pumping pipe member, which is connected to a deep well pump inserted into the interior of the underground well, so that the geothermal exchange water pumped by the deep well pump is discharged to the outside of the underground well; and an upper protection hole detachable cover member, which is detachably connected to the upper part of the upper protection hole shell member and can cover the upper protection hole shell member, and is connected to the upper protection hole detachable cover member through the pumping pipe member, and the deep well pump is connected to the pumping pipe member, so that when the upper protection hole detachable cover member is separated from the upper protection hole shell member, the pumping pipe member connected to the upper protection hole detachable cover member and the deep well pump connected to the pumping pipe member can be separated from the upper protection hole shell member as a whole together with the upper protection hole detachable cover member.

[0014] According to one aspect of the present invention, a geothermal exchange water flow structure includes: a first underground well module, which is connected to a first geothermal upper protective heat exchange unit on a first underground well formed underground; a second underground well module, which is connected to a second geothermal upper protective heat exchange unit on a second underground well formed at a predetermined interval from the first underground well underground, and is separated from the first underground well module by a predetermined interval; a demand source return pipe, which allows geothermal exchange water to return from the return water header on the demand source side to the first underground well module and the second underground well module side; a first return amount automatic proportional control valve, which is arranged in the demand source return pipe flowing to the first underground well module, and is used to adjust the return water from the return water header to the first underground well module. The return amount of the geothermal exchange water of an underground well module; a second return amount automatic proportional control valve, arranged in the demand source return pipe flowing to the second underground well module, for adjusting the return amount of the geothermal exchange water flowing from the return water manifold to the second underground well module; a control unit, which can control the first return amount automatic proportional control valve and the second return amount automatic proportional control valve; and a seepage reinjection well pipe component, which is used to connect the first underground well module and the second underground well module, so that the return amount is adjusted by the control unit so that the geothermal exchange water seeping from one of the first underground well module and the second underground well module flows into the interior of the other of the first underground well module and the second underground well module.

[0015] According to another aspect of the present invention, a geothermal exchange water flow structure includes: a first underground well module, which is connected to a first geothermal upper protective heat exchange unit on a first underground well formed underground; a plurality of second underground well modules, which are respectively connected to second geothermal upper protective heat exchange units on a plurality of second underground wells formed at a predetermined interval from the first underground well underground, and are separated from the first underground well module by a predetermined interval; a demand source supply pipeline, which allows geothermal exchange water to flow from the first underground well module and the second underground well module to the demand source side; a demand source return pipeline, which allows the geothermal exchange water to flow from the demand source side to the first underground well module and the second underground well module side; and a side balancing pipe member, which connects a plurality of the second underground well modules and the demand source return pipeline, so that the geothermal exchange water flowing through the demand source return pipeline can flow through, and the geothermal exchange water is distributed to each of the second underground well modules and flows.

[0016] According to another aspect of the present invention, the geothermal exchange water flow structure includes: a plurality of first underground well modules, each of which is connected to a first geothermal upper protective heat exchange unit on a plurality of first underground wells formed underground; a plurality of second underground well modules, each of which is connected to a second geothermal upper protective heat exchange unit on a plurality of second underground wells formed at a predetermined interval from the first underground wells underground, and is separated from the first underground well modules by a predetermined interval; a demand source supply pipeline, which allows geothermal exchange water to flow from the first underground well module and the second underground well module to the demand source side; a demand source return pipeline, which allows the geothermal exchange water to flow from the demand source side to the first underground well module and the second underground well module side; and a balancing pipe component, which connects the plurality of first underground well modules or the plurality of second underground well modules to the demand source return pipeline, so that the geothermal exchange water flowing through the demand source return pipeline can flow through, and distributes the geothermal exchange water to each of the first underground well modules or each of the second underground well modules and flows.

[0017] Effects of the Invention

[0018] According to one aspect of the present invention, a geothermal upper protection heat exchange unit and a geothermal exchange water flow structure including the geothermal upper protection heat exchange unit, the geothermal upper protection heat exchange unit includes: an upper protection hole shell component, a pumping pipe component, and an upper protection hole detachable cover component, through which the pumping pipe component is connected to the upper protection hole detachable cover component, and a deep well pump is connected to the pumping pipe component. When the upper protection hole detachable cover component is separated from the upper protection hole shell component, the pumping pipe component connected to the upper protection hole detachable cover component and the deep well pump connected to the pumping pipe component can be separated from the upper protection hole shell component as a whole together with the upper protection hole detachable cover component, thereby having the effect of easily accessing the deep well pump to replace and repair the deep well pump arranged inside the underground well.

[0019] According to another aspect of the present invention, the geothermal upper protective heat exchange unit and the geothermal exchange water flow structure including the geothermal upper protective heat exchange unit, through the geothermal exchange water flow structure, include: a first underground well module, a second underground well module, and a seepage reinjection well pipe component, so that the geothermal exchange water seeping from at least one of the multiple underground wells can flow to other underground wells among the multiple underground wells, thereby having the effect that the geothermal exchange water seeping from at least one of the multiple underground wells can be reinjected into other underground wells among the multiple underground wells.

[0020] According to the geothermal upper protection heat exchange unit and the geothermal exchange water flow structure including the geothermal upper protection heat exchange unit on the other side of the present invention, in the geothermal exchange water flow structure, the demand source supply pipe extended from the first discharge pipe member and the second discharge pipe member respectively constituting the first underground well module and the second underground well module are merged to form a single pipe and extended to the supply header side and connected to the supply header, and the demand source return pipe is extended from the return water header to the first underground well module and the second underground well module in the form of a single pipe, and then branches near the first underground well module and the second underground well module, so that the geothermal exchange water flows back to the first underground well module and the second underground well module respectively, thereby having the effect of connecting multiple underground wells to the supply header or the return water header through a simple structure, thereby greatly reducing the construction cost for the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 1 is a vertical cross-sectional view showing a state in which the geothermal upper protection heat exchange unit according to the first embodiment of the present invention is applied.

[0022] Figure 2 yes Figure 1 Enlarged view of part A.

[0023] Figure 3 yes Figure 1 Magnified view of part B.

[0024] Figure 4 is a diagram showing a geothermal heat exchange water flow structure according to a first embodiment of the present invention.

[0025] Figure 5 is a cross-sectional view showing the structure of a float valve constituting a geothermal heat exchange water flow structure according to a first embodiment of the present invention.

[0026] Figure 6 is a diagram showing a geothermal heat exchange water flow structure according to a second embodiment of the present invention.

[0027] Figure 7 yes Figure 5 Magnified view of part C.

[0028] Figure 8 FIG. 1 is a top view of a portion of a geothermal heat exchange water flow structure according to a second embodiment of the present invention.

[0029] Fig. 9 FIG. 1 is a top view of a portion of a geothermal heat exchange water flow structure according to a third embodiment of the present invention.

[0030] Fig.10FIG. 4 is a top view of a portion of a geothermal heat exchange water flow structure according to a fourth embodiment of the present invention.

[0031] Fig.11 It is an enlarged view of a part of a geothermal heat exchange water flow structure according to a fifth embodiment of the present invention.

[0032] Fig.12 It is an enlarged view of a part of the geothermal heat exchange water flow structure according to the sixth embodiment of the present invention. DETAILED DESCRIPTION

[0033] Best Mode for Carrying Out the Invention

[0034] Hereinafter, a geothermal upper protection heat exchange unit and a geothermal heat exchange water flow structure including the geothermal upper protection heat exchange unit according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0035] Figure 1 1 is a vertical cross-sectional view showing a state in which the geothermal upper protection heat exchange unit according to the first embodiment of the present invention is applied. Figure 2 yes Figure 1 Enlarged view of part A. Figure 3 yes Figure 1 Magnified view of part B. Figure 4 is a diagram showing a geothermal heat exchange water flow structure according to a first embodiment of the present invention. Figure 5 is a cross-sectional view showing the structure of a float valve constituting a geothermal heat exchange water flow structure according to a first embodiment of the present invention.

[0036] Also refer to Figures 1 to 5 According to the geothermal upper protection heat exchange unit 100 of the present embodiment, the upper protection hole shell component 110 , the pumping pipe component 130 , and the upper protection hole detachable cover component 120 .

[0037] In addition, the geothermal upper protection heat exchange unit 100 further includes: a discharge pipe component 140 , a discharge return check valve 141 , an upper protection hole inner tube 146 , and a contraction and expansion buffer component 115 .

[0038] The upper protection hole housing member 110 is installed on the underground well 10 formed underground, with its upper portion exposed to the ground and its interior formed in a hollow cylindrical shape.

[0039] The underground well 10 includes an underground well inner pipe 20 therein. The inner pipe 20 is provided to penetrate the underground well 10 at a predetermined interval from an inner wall of the underground well 10 .

[0040] The underground well inner pipe 20 is made of polyvinyl chloride (PVC) or the like, and has a hollow cylindrical shape inside. A plurality of holes are opened at the lower part thereof, and geothermal exchange water at the lower part of the underground well 10 can flow into the interior of the underground well inner pipe 20 through the holes.

[0041] A deep well pump 40 connected to a pumping pipe body 131 described later is provided inside the underground well inner pipe 20 so that the geothermal exchange water in the underground well 10 flows in and rises.

[0042] The upper protection hole detachable cover member 120 is detachably connected to the upper portion of the upper protection hole housing member 110 , can cover the upper protection hole housing member 110 , and includes a detachable cover body 121 and a pumping pipe fixing body 122 .

[0043] The detachable cover 121 is detachably connected to the upper portion of the upper protection hole housing member 110 to cover the upper portion of the upper protection hole housing member 110 .

[0044] The pumping pipe fixing body 122 is formed at a lower portion of the detachable cover 121 for connecting the pumping pipe member 130 to the detachable cover 121 .

[0045] The pumping pipe fixing body 122 is formed in a plate shape, and the entirety thereof crosses the inner lower portion of the detachable cover body 121 to divide the detachable cover body 121 .

[0046] The pumping pipe component 130 is connected to the deep well pump 40 which is arranged to be inserted into the underground well 10, so that the geothermal exchange water pumped by the deep well pump 40 is discharged to the outside of the underground well 10, and includes: the pumping pipe body 131, the pumping pipe bend 132, and the pumping pipe through-body 133.

[0047] The pumping pipe body 131 is in a shape extending a predetermined length from the deep well pump 40 to the removable cover body 121, and is extended to the central part or the lower part of the underground well inner pipe 20. The deep well pump 40 is connected to the lower part of the pumping pipe body, and the upper part is extended to the pumping pipe fixed body 122.

[0048] The pumping pipe bent body 132 extends from the pumping pipe main body 131 to penetrate the pumping pipe fixed body 122 and protrude above the pumping pipe fixed body 122, and the portion penetrating a portion of the pumping pipe fixed body 122 is bent into an inverted U shape, and its terminal end penetrates another portion of the pumping pipe fixed body 122 again.

[0049] The pumping pipe penetration body 133 is extended from the pumping pipe bent body 132 of the pump, and is formed to protrude a predetermined length toward the lower space of the pumping pipe fixing body 122 , and is parallel to the pumping pipe main body 131 .

[0050] When constructed as described above, the pumping pipe member 130 is connected to the upper protection hole removable cover member 120, and the deep well pump 40 is connected to the pumping pipe member 130, so that when the upper protection hole removable cover member 120 is separated from the upper protection hole shell member 110, the pumping pipe member 130 connected to the upper protection hole removable cover member 120 and the deep well pump 40 connected to the pumping pipe member 130 can be separated from the upper protection hole shell member 110 as a whole together with the upper protection hole removable cover member 120, so that the deep well pump 40 can be easily accessed to replace and repair the deep well pump 40 arranged inside the underground well 10.

[0051] The discharge pipe component 140 is extended along the interior of the upper protection hole shell component 110 to the upper part of the upper protection hole shell component 110, so that it can be detachably connected to the pumping pipe through-body 133, and the lower part of the discharge pipe component 140 protrudes toward the external space of the upper protection hole shell component 110, so that the geothermal exchange water pumped by the deep well pump 40 through the pumping pipe component 130 is discharged to the outside of the upper protection hole shell component 110 to be supplied to the demand source.

[0052] The discharge backflow check valve 141 is installed on the discharge pipe member 140 to prevent the geothermal heat exchange water flowing through the discharge pipe member 140 from flowing back to the pumping pipe member 130 .

[0053] Through the discharge backflow check valve 141, the geothermal exchange water only flows outward from the pumping pipe component 130, and will not flow back from the outside to the pumping pipe component 130 side, thereby stopping the deep well pump 40 to replace and repair the pump 40. Moreover, even if the upper protection hole removable cover component 120 and the pumping pipe component 130 are separated from the upper protection hole shell component 110, the geothermal exchange water will not arbitrarily flow back from the outside to the pumping pipe component 130 side.

[0054] The upper protection hole inner tube 146 is configured to penetrate the upper protection hole shell component 110 in a manner separated from the inner wall of the upper protection hole shell component 110 by a predetermined interval, and the pumping pipeline body 131 penetrates along the interior of the upper protection hole inner tube, and the lower end of the upper protection hole inner tube is separated from the underground well inner tube 20 by a predetermined interval.

[0055] The discharge duct member 140 is disposed between the outer surface of the upper protection hole inner tube 146 and the inner surface of the upper protection hole housing member 110 .

[0056] The shrinkage and expansion buffering member 115 connects the underground well pipe 20 and the upper protection hole inner pipe 146 which are separated from each other, wherein, in order to buffer the shrinkage and expansion of the underground well pipe 20 according to the temperature change of the geothermal exchange water, its length can be changed according to the change in the interval between the underground well pipe 20 and the upper protection hole inner pipe 146.

[0057] The shrinkage and expansion buffer member 115 may be formed in a bellows shape, or may be in a pipe shape having elasticity such as silicone rubber.

[0058] When the temperature of the geothermal exchange water increases relatively, the underground well pipe 20 expands relatively, and the length of the underground well pipe 20 increases relatively. At this time, the length of the shrinkage and expansion buffer component 115 decreases by an amount equivalent to the increase in the underground well pipe 20. When the temperature of the geothermal exchange water decreases relatively, the underground well pipe 20 shrinks relatively, and the length of the underground well pipe 20 decreases relatively. At this time, the length of the shrinkage and expansion buffer component 115 increases by an amount equivalent to the shortening of the underground well pipe 20. Therefore, the shrinkage and expansion of the underground well pipe 20 can be buffered according to the temperature change of the geothermal exchange water.

[0059] Specifically, the shrinkage and expansion buffer member 115 is formed into a bellows shape. As the temperature of the geothermal exchange water changes, the underground well pipe 20 shrinks and expands, and the interval between the underground well pipe 20 and the upper protection hole inner pipe 146 changes. At this time, while each fold of the shrinkage and expansion buffer member 115 becomes narrower or spaced apart from each other, the length of the shrinkage and expansion buffer member 115 changes, thereby buffering the expansion and contraction of the underground well pipe 20 according to the temperature change of the geothermal exchange water.

[0060] The insertion pipe 30 is extended at the lower end of the upper protection hole inner pipe 146, and the outer diameter of the insertion pipe 30 is formed to be relatively smaller than the inner diameter of the underground well inner pipe 20. The insertion pipe 30 is inserted into the underground well inner pipe 20, but the insertion pipe 30 is not connected to the underground well inner pipe 20, that is, it remains unconnected. In addition, the upper end of the shrinkage and expansion buffer member 115 is connected in a manner surrounding the lower periphery of the upper protection hole inner pipe 146, and the lower end of the shrinkage and expansion buffer member 115 surrounds the upper periphery of the underground well inner pipe 20. In this state, as the underground well pipe 20 shrinks and expands according to the temperature change of the geothermal exchange water, when the length of the shrinkage and expansion buffer member 115 changes, the inserted pipe 30 rises while remaining inserted into the interior of the underground well pipe 20. Therefore, even if the interval between the upper protection hole inner pipe 146 and the underground well pipe 20 changes, the central axes of the upper protection hole inner pipe 146 and the underground well pipe 20 can remain consistent, and the geothermal exchange water can flow smoothly.

[0061] In addition, a return water inflow pipe 142 is formed at a lower portion of the upper protection hole housing member 110 , and the return water inflow pipe is formed at a position relatively lower than the discharge pipe member 140 by a predetermined height.

[0062] The return water inflow pipe 142 is a pipe that allows the geothermal heat exchange water returning from the demand source to flow into the interior of the upper protection hole housing member 110 .

[0063] The geothermal exchange water flowing in through the return water side inflow pipe 142 falls through the space between the outer surface of the shrinkage and expansion buffer component 115 and the inner surface of the upper protective hole shell component 110, and flows through the space between the inner surface of the underground well 10 and the outer surface of the underground well inner pipe 20 to exchange heat with the ground, and then flows into the interior of the underground well inner pipe 20 through the perforations at the lower part of the underground well inner pipe 20, is lifted by the deep well pump 40, and is supplied to the demand source through the pumping pipe component 130 and the discharge pipe component 140.

[0064] In this embodiment, a blocking wall member 105 is further formed at the lower portion of the upper protection hole shell member 110 for blocking the discharge pipe member 140 and the return water side inflow pipe 142 to prevent the geothermal exchange water flowing into the interior of the upper protection hole shell member 110 through the return water side inflow pipe 142 from rising arbitrarily toward the discharge pipe member 140 side.

[0065] The blocking wall member 105 is formed in a plate shape and completely blocks the discharge pipe member 140 and the return water inflow pipe 142 .

[0066] The barrier wall member 105 is also provided with a barrier wall hole 106, to which another pressure regulating pipe (not shown) is connected, and an on-off valve (not shown) is provided on the upper portion of the pressure regulating pipe. Thus, whether the geothermal exchange water on the lower side of the barrier wall member 105 flows to the pressure regulating pipe and the flow rate can be adjusted through the pressure regulating pipe according to the opening and closing of the on-off valve. Thus, the pressure in the lower space of the barrier wall member 105 can be easily adjusted from the outside.

[0067] Reference numeral 145 denotes an inner tube extension tube, which is extended from the lower portion of the upper protection hole inner tube 146 to one side, penetrates the upper protection hole housing member 110 , and protrudes to the outside of the upper protection hole housing member 110 .

[0068] The inner tube extension tube 145 can be connected to the seepage water reinjection well pipe component 153 described later.

[0069] The inner pipe extension pipe 145 is formed in the upper protection hole housing member 110 at a relatively higher position than the return water inflow pipe 142 .

[0070] Hereinafter, the operation of the geothermal upper protection heat exchange unit 100 according to the present embodiment will be described with reference to the drawings.

[0071] The geothermal exchange water that flows back from the demand source and flows in through the return water side inflow pipe 142 falls through the space between the outer surface of the shrinkage and expansion buffer member 115 and the inner surface of the upper protective hole shell member 110, and exchanges heat with the underground while flowing through the space between the inner surface of the underground well 10 and the outer surface of the underground well inner pipe 20, and then flows into the interior of the underground well inner pipe 20 through the perforations at the lower part of the underground well inner pipe 20.

[0072] As described above, the geothermal exchange water flowing into the underground well inner pipe 20 is lifted by the deep well pump 40 , flows through the pumping pipe member 130 and the discharge pipe member 140 , and is supplied to the demand source.

[0073] In addition, according to the geothermal exchange water flow structure 150 of this embodiment, it includes: a first underground well module 190, a second underground well module 195, a demand source return pipe 152, a first return flow automatic proportional control valve 156, a second return flow automatic proportional control valve 157, a control unit 158, and the seepage recharge well pipe component 153.

[0074] The first underground well module 190 is a form in which the first geothermal upper protection heat exchange unit 100 is connected to the first underground well 10 formed underground.

[0075] The second underground well module 195 is formed in a state where a second geothermal upper protection heat exchange unit 1100 is connected to a second underground well formed at a predetermined interval from the first underground well 10 underground, and is spaced a predetermined interval from the first underground well module 190 .

[0076] The first underground well 10 and the second underground well are both identical to the underground well 10, and the underground wells 10 are formed at locations spaced apart from each other.

[0077] The first geothermal upper protection heat exchange unit 100 and the second geothermal upper protection heat exchange unit 1100 are the same as the geothermal upper protection heat exchange unit 100 , and are respectively disposed on the first underground well 10 and the second underground well 10 .

[0078] Of course, the first underground well module 190 and the second underground well module 195 are not only applicable to the first underground well inner tube 20 and the second underground well inner tube 20 corresponding to the underground well inner tube 20 respectively, but also to the first deep well pump 40 and the second deep well pump corresponding to the deep well pump 40 respectively.

[0079] Next, "first" and "second" are further added in front of each component of the first geothermal upper protection heat exchange unit 100 and the second geothermal upper protection heat exchange unit 1100. This component constitutes the geothermal upper protection heat exchange unit 100 and is the same as the component without "first" and "second".

[0080] For example, both the first upper protection hole housing member 110 and the second upper protection hole housing member 1110 have the same structure as the upper protection hole housing member 110 .

[0081] The demand source return pipe 152 allows the geothermal exchange water to flow back from the return water header (not shown) on the demand source side to the first underground well module 190 and the second underground well module 195 .

[0082] The first return flow automatic proportional control valve 156 is disposed in the demand source return flow pipeline 152 flowing to the first underground well module 190 , and is used to adjust the return flow of the geothermal exchange water flowing from the return water manifold to the first underground well module 190 .

[0083] The second return flow automatic proportional control valve 157 is arranged in the demand source return flow pipeline 152 flowing to the second underground well module 195, and is used to adjust the return flow of the geothermal exchange water flowing from the return water manifold to the second underground well module 195.

[0084] The control unit 158 ​​may control the first reflux volume automatic proportional control valve 156 and the second reflux volume automatic proportional control valve 157 .

[0085] The seepage recharge well pipe component 153 is used to connect the first underground well module 190 and the second underground well module 195, so that the recharge volume can be adjusted by the control unit 158, so that the geothermal exchange water seeping from one of the first underground well module 190 and the second underground well module 195 can flow into the interior of the other of the first underground well module 190 and the second underground well module 195.

[0086] The geothermal exchange water diversion flowing from the return water manifold on the demand source side through the demand source return pipe 152 can flow back to the first underground well module 190 and the second underground well module 195 after passing through the first return volume automatic proportional control valve 156 and the second return volume automatic proportional control valve 157 respectively.

[0087] By constructing as described above, each return amount of the geothermal exchange water returned to the first underground well module 190 and the second underground well module 195 respectively installed in the plurality of underground wells can be controlled by the control unit 158, and thus, the return amount of the geothermal exchange water in one of the first underground well module 190 and the second underground well module 195 respectively installed in each of the underground wells can be intentionally increased relatively, and a height difference of the natural water level of the groundwater is formed in the first underground well module 190 and the second underground well module 195 installed in each of the underground wells, so that seepage occurs in one of the first underground well module 190 and the second underground well module 195 respectively installed in each of the underground wells, and recharge occurs in the other of the first underground well module 190 and the second underground well module 195 installed in each of the underground wells, so that the flow of the underground aquifer can be activated and the heat exchange efficiency of each underground well can be improved without discharging groundwater.

[0088] The first geothermal upper protection heat exchange unit 100 includes: a first upper protection hole shell member 110, which is installed on the first underground well 10 and its upper part is exposed to the ground; a first pumping pipe member 130, which is connected to a first deep well pump 40 configured to be inserted into the interior of the first underground well 10, and is used to discharge the geothermal exchange water pumped by the first deep well pump 40 to the outside of the first underground well 10; a first upper protection hole inner tube 146, which is configured to penetrate the first upper protection hole shell member 110 in a manner separated from the inner wall of the first upper protection hole shell member 110 by a predetermined interval; and a first inner tube extension tube 145, which is extended toward the first upper protection hole inner tube 146 to form a shape protruding to the outside of the first upper protection hole shell member 110.

[0089] In addition, the second geothermal upper protection heat exchange unit 1100 includes: a second upper protection hole shell member 1110, which is installed on the second underground well and its upper part is exposed to the ground; a second pumping pipe member, which is connected to a second deep well pump configured to be inserted into the interior of the second underground well, and is used to discharge the geothermal exchange water pumped by the second deep well pump to the outside of the second underground well; a second upper protection hole inner tube 1146, which is configured to penetrate the second upper protection hole shell member 1110 in a manner separated from the inner wall of the second upper protection hole shell member 1110 by a predetermined interval; and a second inner tube extension tube 1145, which is extended from the second upper protection hole inner tube 1146 and is formed to protrude to the outside of the second upper protection hole shell member 1110.

[0090] The geothermal heat exchange water flow structure 150 according to the present embodiment includes a demand source supply pipe 151 .

[0091] The demand source supply pipe 151 is extended from the first discharge pipe member 140 and the second discharge pipe member 1140 respectively, so that the geothermal exchange water flows to be supplied from the first underground well module 190 and the second underground well module 195 to the supply header (not shown) on the demand source side.

[0092] In this embodiment, the demand source supply pipe 151 extended from the first discharge pipe member 140 and the second discharge pipe member 1140 respectively merges to form a single pipe form, and in this state is extended to the supply header side and connected to the supply header, and the demand source return pipe 152 is extended from the return header to the first underground well module 190 and the second underground well module 190 side in a single pipe form, and then branches to the first underground well module 190 and the second underground well module 195, so that the geothermal exchange water flows to flow back to the first underground well module 190 and the second underground well module 195. In this way, a plurality of the underground wells 10 can be connected to the supply header or the return header through a simple structure, and the construction cost for such connection can be greatly reduced.

[0093] The demand source return pipe 152 branches near the return water collection pipe and leads to the first underground well module 190 and the second underground well module 195 respectively. The first return volume automatic proportional control valve 156 and the second return volume automatic proportional control valve 157 are respectively installed on each branch part of the demand source return pipe 152. Each branch part of the demand source return pipe 152 is respectively connected to the first return water side inflow pipe 142 constituting the first underground well module 190 and the second return water side inflow pipe 1142 constituting the second underground well module 195.

[0094] At this time, the return amount of the geothermal exchange water returning to the first underground well module 190 and the second underground well module 195 is adjusted by the control unit 158, so that the first underground well module 190 and the second underground well module 195 respectively arranged in the underground well induce the height difference of the natural water level of the groundwater, so that water seepage and recharge occur in the first underground well module 190 and the second underground well module 195, which can activate the flow of the underground aquifer and improve the heat exchange efficiency of each underground well without discharging groundwater.

[0095] In this embodiment, the seepage water reinjection well pipe component 153 connects the first inner pipe extension pipe 145 and the second inner pipe extension pipe 1145 .

[0096] The geothermal heat exchange water flow structure 150 according to this embodiment further includes: a first return water side connecting pipe 155 , a first float valve 170 , a second return water side connecting pipe 1155 , and a second float valve 1170 .

[0097] The first return water side connecting pipe 155 is used to connect the lower part of the part which is relatively closer to the location connected with the first inner pipe extension pipe 145 than the center part of the seepage reinjection well pipe component 153 and the upper part of the part of the demand source return pipe 152 which is separated by a predetermined interval from the part connecting the demand source return pipe 152 and the first return water side inflow pipe 142.

[0098] The first float valve 170 is installed between the first return water side connecting pipe 155 and the demand source return pipe 152 , so that the geothermal exchange water flows from the first return water side connecting pipe 155 only to the demand source return pipe 152 side.

[0099] Specifically, the first float valve 170 includes: a first float box 171, which is connected to the first return water side connecting pipe 155 and the demand source return pipe 152 at the same time, and its interior is empty; a first float lower panel 172, which is in the shape of a plate and crosses the lower part of the first float box 171 to divide it; a first float lower side through hole 173, a plurality of which are formed on the first float lower panel 172; a first float upper panel 175, which is in the shape of a plate and crosses the upper part of the first float box 171 to divide it; a first float upper side through hole 176, which passes through the central part of the first float upper panel 175; and a first float 174, which is arranged between the first float lower panel 172 and the first float upper panel 175, and can float on the water surface of the geothermal exchange water.

[0100] The geothermal exchange water seeps out of the first underground well 10 of the first underground well module 190 and overflows through the first inner tube extension pipe 145. When the second underground well module 195 does not seep out the geothermal exchange water, since the first inner tube extension pipe 145 is located at a relatively higher position than the first return water side inflow pipe 142, the geothermal exchange water overflowing from the first upper protection hole shell member 110 inside the first buoyancy box 171 which is located at a relatively lower position than the first inner tube extension pipe 145 flows through the first return water side inflow pipe 142 and the demand side inflow pipe 142. After the source return pipe 152 returns, it flows into the space between the first float upper panel 175 and the first float lower panel 172 through the first float lower side through hole 173, thereby, the first float 174 floats while blocking the first float upper side through hole 176, thereby preventing the first geothermal exchange water from flowing through the first return side connecting pipe 155 to the first float valve 170 side, and the geothermal exchange water seeping out through the first inner tube extension pipe 145 flows through the seepage recharge well pipe component 153 and is recharged to the second underground well module 195 side.

[0101] If the geothermal exchange water does not seep out through the first inner tube extension pipe 145 in the first underground well 10 of the first underground well module 190, the water level of the geothermal exchange water inside the first upper protection hole shell component 110 cannot reach the first return water side inflow pipe 142. When the geothermal exchange water seeps out of the second underground well module 195, the float 174 descends to a state of descending toward the side of the first floating body lower panel 172 to open the first floating body upper through hole 176. Thus, the geothermal exchange water seeping out from the second underground well module 195 and flowing through the seepage reinjection well pipe component 153 flows through the first return water side connecting pipe 155, and then is reinjected into the interior of the first upper protection hole shell component 110 through the first floating body upper through hole 176, the first floating body lower through hole 173, the demand source return pipe 152, and the first return water side inflow pipe 142.

[0102] As described above, when the seepage water reinjection well pipe component 153 is applied, the geothermal exchange water seeping out of at least one of the multiple underground wells 10 can flow to other underground wells among the multiple underground wells 10, and therefore, the geothermal exchange water seeping out of at least one of the multiple underground wells 10 can be reinjected into other underground wells among the multiple underground wells 10.

[0103] The second return water side connecting pipe 1155 is used to connect the lower part of the part which is relatively closer to the location connected with the second inner pipe extension pipe 1145 than the center part of the seepage reinjection well pipe component 153 and the upper part of the part of the demand source return pipe 152 which is separated by a predetermined interval from the part connecting the demand source return pipe 152 and the second return water side inflow pipe 1142.

[0104] The second float valve 1170 is disposed between the second return water side connecting pipe 1155 and the demand source return pipe 152 , so that the geothermal exchange water flows from the second return water side connecting pipe 1155 only to the demand source return pipe 152 side.

[0105] Since the detailed structure of the second float valve 1170 is the same as that of the first float valve 170 , the description of the first float valve 170 will be used instead, and the repeated description will be omitted here.

[0106] Next, the operation of the geothermal heat exchange water flow structure 150 according to the present embodiment will be described with reference to the drawings.

[0107] When no water seepage occurs in the first underground well module 190 and the second underground well module 195, each geothermal exchange water discharged through the first discharge pipe component 140 and the second discharge pipe component 1140 respectively is supplied to the supply manifold side through the demand source supply pipe 151, and then transfers heat to the heating pump (not shown) on the demand side, and then flows through the return water manifold and the demand side return pipe 152, and then flows into the interior of the first underground well module 190 and the second underground well module 195 through the first return water side inflow pipe 142 and the second return water side inflow pipe 1142, thereby the geothermal exchange water circulates.

[0108] When water seepage occurs in the first underground well module 190 and recharge occurs in the second underground well module 195, the geothermal exchange water seeping from the first upper protection hole shell component 110 flows through the first inner tube extension pipe 145 and the seepage recharge well pipe component 153, and then recharges into the interior of the second upper protection hole shell component 1110 through the second return water side connecting pipe 1155, the second float valve 1170, the demand source return pipe 152, and the second return water side inflow pipe 1142.

[0109] At this time, the first float valve 170 blocks the geothermal exchange water from flowing through the first return water side connecting pipe 155, so that the geothermal exchange water seeping out from the first upper protection hole shell component 110 will not flow to the first return water side connecting pipe 155, but can flow to the second underground well module 195 through the seepage recharge well pipe component 153.

[0110] When water seepage occurs in the second underground well module 195 and recharge occurs in the first underground well module 190, the geothermal exchange water seeping out from the second upper protection hole shell component 1110 can flow through the second inner tube extension pipe 1145 and the seepage recharge well pipe component 153, and then recharge into the interior of the first upper protection hole shell component 110 through the first return water side connecting pipe 155, the first float valve 170, the demand source return pipe 152 and the first return water side inflow pipe 142.

[0111] At this time, the second float valve 1170 blocks the geothermal exchange water from flowing through the second return water side connecting pipe 1155, so that the geothermal exchange water seeping out from the second upper protection hole shell component 1110 will not flow to the second return water side connecting pipe 1155, but can flow to the first underground well module 190 side through the seepage recharge well pipe component 153.

[0112] As described above, the geothermal upper protection heat exchange unit 100 includes: the upper protection hole shell component 110, the pumping pipe component 130, and the upper protection hole removable cover component 120, the pumping pipe component 130 is connected to the upper protection hole removable cover component 120, and the deep well pump 40 is connected to the pumping pipe component 130, so that when the upper protection hole removable cover component 120 is separated from the upper protection hole shell component 110, the pumping pipe component 130 connected to the upper protection hole removable cover component 120 and the deep well pump 40 connected to the pumping pipe component 130 can be separated from the upper protection hole shell component 110 as a whole together with the upper protection hole removable cover component 120, so that the deep well pump 40 can be easily accessed to replace and repair the deep well pump 40 arranged inside the underground well 10.

[0113] In addition, since the geothermal exchange water flow structure 150 includes the first underground well module 190, the second underground well module 195, and the seepage reinjection well pipe component 153, the geothermal exchange water seeping from at least one of the multiple underground wells 10 can flow to other underground wells among the multiple underground wells 10, so that the geothermal exchange water seeping from at least one of the multiple underground wells 10 can be reinjected into other underground wells among the multiple underground wells 10.

[0114] In addition, in the geothermal exchange water flow structure 150, the demand source supply pipe 151 extended from the first discharge pipe component 140 and the second discharge pipe component 1140 respectively constituting the first underground well module 190 and the second underground well module 195 respectively merges to form a single tube form and extends to the supply manifold side and is connected to the supply manifold. The demand source return pipe 152 is extended from the return water manifold to the first underground well module 190 and the second underground well module 195 side in a single tube form, and then branches off near the first underground well module 190 and the second underground well module 195, so that the geothermal exchange water flow returns to the first underground well module 190 and the second underground well module 195 respectively. Therefore, a plurality of the underground wells 10 can be connected to the supply manifold or the return water manifold through a simple structure, and the construction cost for the connection can be greatly reduced.

[0115] Specific ways to implement the invention

[0116] Next, the geothermal upper protection heat exchange unit and the geothermal exchange water flow structure including the geothermal upper protection heat exchange unit according to other embodiments of the present invention will be described with reference to the accompanying drawings. When describing, the contents repeated with those described in the above-mentioned first embodiment of the present invention will be replaced by them, and the repeated description is omitted here.

[0117] Figure 6 is a diagram showing a geothermal heat exchange water flow structure according to a second embodiment of the present invention, Figure 7 yes Figure 5 The enlarged view of part C in the middle. Figure 8 FIG. 1 is a top view of a portion of a geothermal heat exchange water flow structure according to a second embodiment of the present invention.

[0118] Also refer to Figures 6 to 8 According to the geothermal exchange water flow structure 250 of this embodiment, it includes: multiple first underground well modules 290, multiple second underground well modules 295, a demand source supply pipeline 251, a demand source return pipeline 252, a first return flow automatic proportional control valve 256, a second return flow automatic proportional control valve 257, a control unit 258 and a balance pipe component 260, 1260.

[0119] The plurality of first underground well modules 290 are in a form in which the first geothermal upper protection heat exchange units 200 are respectively connected to a plurality of first underground wells formed underground.

[0120] The plurality of second underground well modules 295 are formed in a form in which the second geothermal upper protection heat exchange units 1200 and 2200 are respectively connected to the plurality of second underground wells formed at a predetermined interval from the first underground well underground, and are formed at a predetermined interval from the first underground well module 290.

[0121] The balancing pipe components 260, 1260 connect multiple first underground well modules 290 or multiple second underground well modules 295 to the demand source return pipe 252 to allow geothermal exchange water flowing through the demand source return pipe 252 to flow through, and distribute the geothermal exchange water to each first underground well module 290 or each second underground well module 295 and flow.

[0122] The balance pipe member 260, 1260 includes: the other side balance pipe member 260, which is connected to multiple first underground well modules 290; and the one side balance pipe member 1260, which is connected to multiple second underground well modules 295. The specific structure of the one side balance pipe member 1260 is described below. The description of the specific structure of the one side balance pipe member 1260 can be similarly applied to the other side balance pipe member 260, and repeated descriptions will be omitted.

[0123] Specifically, the one-side balancing pipe component 1260 includes: a one-side balancing pipe body 1261 , a one-side balancing pipe inlet pipe 1262 , and a one-side balancing pipe outlet pipe 1263 .

[0124] The one-side balancing tube body 1261 is formed into a hollow tube of a predetermined length, and is perpendicular to the direction of gravity and horizontally arranged on the ground.

[0125] The one-side balancing pipe inflow pipe 1262 is extended from the demand source return pipe 252, and protrudes from the lower part of the one-side balancing pipe body 1261 to be connected to the demand source return pipe 252, so that the geothermal exchange water flowing from the return water manifold through the second return volume automatic proportional control valve 257 and the demand source return pipe 252 can flow into the interior of the one-side balancing pipe body 1261.

[0126] The one side balancing pipe outlet pipes 1263 protrude multiple times from the upper part of the one side balancing pipe body 1261 and are connected to each return water side inflow pipe 1242, 2242 of each second underground well module 295, so that the geothermal exchange water flowing into the one side balancing pipe body 1261 through the one side balancing pipe inflow pipe 1262 can flow out to each second underground well module 295.

[0127] like Figure 7 As shown, each discharge pipe component 1240, 2240 is connected to the demand source supply pipe 251, but in Figure 8 In order to show the connection relationship between each return water side inflow pipe 1242, 2242, the illustration of the demand source supply pipe 251 is omitted.

[0128] After the geothermal heat exchange water flowing through the one-side balance pipe inlet pipe 1262 accumulates inside the one-side balance pipe body 1261 , it can be distributed to each second underground well module 295 through each one-side balance pipe outlet pipe 1263 and flow.

[0129] The balance pipe component 260 , 1260 includes a water level sensing sensor 1264 installed on the balance pipe body 1261 on one side and used for sensing the water level in the balance pipe body 1261 on one side.

[0130] The one-side water level sensing sensor 1264 is connected to the upper part of the one-side balance tube body 1261, and can sense the water level in the one-side balance tube body 1261. As an example, a float valve such as the first float valve shown in the first embodiment can be proposed.

[0131] As described above, the geothermal exchange water flow structure 250 includes: a plurality of the first underground well modules 290, a plurality of the second underground well modules 295, the demand source supply pipeline 251, the demand source return pipeline 252, the first return volume automatic proportional control valve 256, the second return volume automatic proportional control valve 257, the control unit 258, and the balance pipe components 260 and 1260. Therefore, the geothermal exchange water flowing through the demand source return pipeline 252 can be distributed to each second underground well module 295 and flow after passing through the balance pipe components 260 and 1260. Thus, a plurality of underground wells can be connected to the return water manifold through a simpler structure, which can greatly reduce the construction cost for such connection.

[0132] Here, when the balance pipe members 260, 1260 are omitted, the underground well module may be constructed as a single unit. For example, when the other side balance pipe member 260 is omitted, the first underground well module 290 may be constructed as a single unit.

[0133] Hereinafter, the geothermal upper protection heat exchange unit and the geothermal exchange water flow structure including the geothermal upper protection heat exchange unit according to the third embodiment of the present invention will be described with reference to the accompanying drawings. When describing, the description repeated with the contents recorded in the first and second embodiments of the present invention will be replaced by them and the description will be omitted.

[0134] Fig. 9 FIG. 1 is a top view of a portion of a geothermal heat exchange water flow structure according to a third embodiment of the present invention.

[0135] Reference Fig. 9 According to the geothermal exchange water flow structure 350 of this embodiment, it includes: a first underground well module, multiple second underground well modules, a demand source supply pipeline, a demand source return pipeline, a side balance pipe component 1360, and a seepage water reinjection well pipe component 353.

[0136] In addition, the geothermal heat exchange water flow structure 350 also includes a one-side seepage balance connecting pipe 1355.

[0137] The seepage water reinjection well pipe member 353 is used to connect the first underground well module and the second underground well module, so that the geothermal exchange water seeping from the first underground well module flows into the interior of the second underground well module.

[0138] The seepage water reinjection well pipe component 353 connects the inner pipe extension pipe of the first underground well module and the one side seepage water balance connecting pipe 1355.

[0139] The one-side seepage balance connecting pipe 1355 connects the portion of the seepage recharge well pipe component 353 that is relatively close to the multiple second underground well modules and the one-side balance pipe component 1360, so that at least a portion of the geothermal exchange water that seeps out from the first underground well module and flows through the seepage recharge well pipe component 353 flows into the one-side balance pipe component 1360.

[0140] The one-side seepage balancing connecting pipe 1355 can connect the lower part of the seepage reinjection well pipe component 353 and the upper part of the one-side balancing pipe body 1361 constituting the one-side balancing pipe component 1360 .

[0141] When the one side water level sensing sensor 1364 constituting the one side balance pipe component 1360 is a float valve such as the first float valve proposed in the above-mentioned first embodiment, the one side seepage balance connecting pipe 1355 can be connected to the upper part of the one side balance pipe body 1361 through the one side water level sensing sensor 1364.

[0142] In addition, the geothermal exchange water flow structure 350 further includes a side module connecting pipe 354 formed between each of the second underground well modules and capable of allowing the geothermal exchange water to flow between each of the second underground well modules.

[0143] The one-side module connecting pipe 354 is formed between each of the second underground well modules, enabling the geothermal exchange water to flow between each of the second underground well modules.

[0144] Specifically, the one side module connecting pipe 354 connects each second inner tube extension pipe of multiple second geothermal upper protection heat exchange units 1300, 2300, and multiple second geothermal upper protection heat exchange units 1300, 2300 constitute each second underground well module, and the one side module connecting pipe is connected to the seepage recharge well pipe component 353.

[0145] In addition, the geothermal heat exchange water flow structure 350 also includes a seepage balance connecting pipe 355 on the other side.

[0146] The other-side seepage balance connecting pipe 355 can connect the portion of the seepage reinjection well pipe component 353 that is relatively close to the first underground well module and the first return water side inflow pipe 342 that constitutes the first underground well module.

[0147] When water seepage occurs in at least one of each of the second underground well modules, the seeped geothermal exchange water can flow into the first underground well module through the one side module connecting pipe 354, the seepage recharge well pipe component 353, the other side seepage balance connecting pipe 355, and the first return side inflow pipe 342. When water seepage occurs in the first underground well module, the seeped geothermal exchange water flows into each of the second underground well modules through the seepage recharge well pipe component 353, the one side seepage balance connecting pipe 1355, and the one side balance pipe component 1360.

[0148] Hereinafter, a geothermal upper protection heat exchange unit and a geothermal exchange water flow structure including the geothermal upper protection heat exchange unit according to a fourth embodiment of the present invention will be described with reference to the accompanying drawings. When describing, descriptions repeated with the contents described in the first to third embodiments of the present invention will be replaced by them and the descriptions will be omitted.

[0149] Fig.10 FIG. 4 is a top view of a portion of a geothermal heat exchange water flow structure according to a fourth embodiment of the present invention.

[0150] Reference Fig.10 According to the geothermal exchange water flow structure 450 of this embodiment, it includes: multiple first underground well modules, multiple second underground well modules, demand source supply pipelines, demand source return pipelines, one side balance pipe component 1460, and the other side balance pipe component 460.

[0151] The other-side balancing pipe member 460 connects a plurality of the first underground well modules and the demand source return pipe, so that the geothermal exchange water flowing through the demand source return pipe flows through and distributes the geothermal exchange water to each of the first underground well modules and flows.

[0152] The other-side balancing pipe component 460 includes: a other-side balancing pipe body 461 , a other-side balancing pipe inflow pipe 462 , and a other-side balancing pipe outlet pipe 463 .

[0153] The other-side balancing tube body 461 is formed in a hollow tube shape with a predetermined length, and is perpendicular to the direction of gravity and horizontally arranged on the ground.

[0154] The other side balancing pipe inflow pipe 462 is extended from the demand source return pipe, protrudes from the lower part of the other side balancing pipe body 461 and is connected to the demand source return pipe, so that the geothermal exchange water flowing from the return water manifold through the demand source return pipe flows into the interior of the other side balancing pipe body 461.

[0155] The other side balance pipe outlet pipes 463 protrude multiple times from the upper part of the other side balance pipe body 461 and are connected to each return water side inflow pipe of each first underground well module, so that the geothermal exchange water flowing into the other side balance pipe body 461 through the other side balance pipe inflow pipe 462 can flow out to each first underground well module.

[0156] In addition, the geothermal heat exchange water flow structure 450 includes a seepage water reinjection well pipe component 453.

[0157] The seepage water reinjection well pipe component 453 is used to connect the first underground well module and the second underground well module, so that the geothermal exchange water seeping from one of the first underground well module and the second underground well module flows into the interior of the other of the first underground well module and the second underground well module.

[0158] The geothermal heat exchange water flow structure 450 also includes a seepage balance connecting pipe 455 on the other side.

[0159] The other side seepage balance connecting pipe 455 connects the portion of the seepage recharge well pipe component 453 that is relatively close to the first underground well module and the other side balance pipe component 460, so that at least a portion of the geothermal exchange water that seeps out from the second underground well module and flows through the seepage recharge well pipe component 453 flows into the other side balance pipe component 460.

[0160] The other-side seepage balancing connecting pipe 455 can connect the lower portion of the seepage reinjection well pipe component 453 and the upper portion of the other-side balancing pipe body 461 constituting the other-side balancing pipe component 460 .

[0161] In addition, the geothermal exchange water flow structure 450 also includes another side module connecting pipe 456 formed between each of the first underground well modules and capable of allowing the geothermal exchange water to flow between each of the first underground well modules.

[0162] The other side module connecting pipe 456 is connected to each first inner tube extension pipe of multiple first geothermal upper protection heat exchange units 400, 3400, and multiple first geothermal upper protection heat exchange units 400, 3400 constitute each first underground well module. The other side module connecting pipe is connected to the seepage recharge well pipe component 453.

[0163] When water seepage occurs in at least one of each of the first underground well modules, the seeped geothermal exchange water can flow into the second underground well module through the other side module connecting pipe 456, the seepage recharge well pipe component 453, the one side seepage balance connecting pipe 1455, and the one side balance pipe component 1460. When water seepage occurs in the second underground well module, the seeped geothermal exchange water flows through the seepage recharge well pipe component 453, the other side seepage balance connecting pipe 455, and the other side balance pipe component 460, and then flows to the demand source supply pipe.

[0164] Fig.11 It is a partial enlarged view of the geothermal heat exchange water flow structure according to the fifth embodiment of the present invention.

[0165] Reference Fig.11 In this embodiment, the upper part of the underground well inner tube 20 is inserted into the lower part of the upper protection hole inner tube 546, and a sliding gasket 516 is provided between the upper protection hole inner tube 546 and the underground well inner tube 20.

[0166] The sliding gasket 516 is fixed to one of the upper protection hole inner tube 546 and the underground well inner tube 20, and can move in a state of engagement with the other of the upper protection hole inner tube 546 and the underground well inner tube 20 and in a state of contact with the surface of the other of the upper protection hole inner tube 546 and the underground well inner tube 20. It is made of elastic materials such as rubber and silicone, thereby preventing geothermal exchange water from leaking through the gap between the upper protection hole inner tube 546 and the underground well inner tube 20.

[0167] The underground well inner tube 20 is made of polyvinyl chloride or the like, and its length changes as it shrinks and relaxes with temperature changes. Even if the underground well inner tube 20 shrinks and relaxes as described above, since the sliding gasket 516 is fixed to one of the upper protection hole inner tube 546 and the underground well inner tube 20, while being engaged with the other of the upper protection hole inner tube 546 and the underground well inner tube 20, it elastically deforms on the surface of the other of the upper protection hole inner tube 546 and the underground well inner tube 20 while maintaining a pressed contact state, thereby allowing the sliding gasket 516 to block the gap between the upper protection hole inner tube 546 and the underground well inner tube 20 to prevent the geothermal exchange water from leaking freely through the gap between the upper protection hole inner tube 546 and the underground well inner tube 20.

[0168] Fig.12 It is a partial enlarged view of the geothermal heat exchange water flow structure according to the sixth embodiment of the present invention.

[0169] Reference Fig.12According to the geothermal upper protection heat exchange unit of this embodiment, it includes: an upper protection hole detachable cover member 620, a double cover member 625, an external inflow blocking member 680, and an internal outflow blocking member 685.

[0170] The upper protection hole detachable cover member 620 includes a detachable cover body 621 and a pumping pipe fixing body 622 .

[0171] The double cover member 625 is coupled to the upper portion of the removable cover body 621 to seal the inside of the underground well 10 from the outside, thereby allowing air to flow through the double cover member 625 but preventing water from flowing.

[0172] Specifically, the double cover component 625 includes: a double cover body 627, used to cover the open upper end of the removable cover body 621; a double cover upper extension body 626, which extends a predetermined height above the double cover body 627 and has a hollow interior; and a double upper cover 628, used to cover the open upper end of the double cover upper extension body 626.

[0173] The double cover 627 and the removable cover 621 may be connected by a connecting device such as bolts.

[0174] The external inflow blocking member 680 allows external air to flow into the interior of the double cover member 625 , but blocks external contaminated water from flowing into the interior of the double cover member 625 .

[0175] Specifically, the external inflow blocking member 680 includes: an external inflow pipe 1681 , an external inflow blocking body 681 , an external inflow blocking lifting body 684 , an external inflow blocking locking body 683 , and an external inflow hole forming panel 682 .

[0176] The external inflow pipe 1681 is formed to be longer with a predetermined length, and one end thereof passes through the side wall of the double cover upper extension body 626 and is connected to the outside, so as to introduce the external air and make it flow.

[0177] The external inflow blocking body 681 is arranged inside the double cover upper extension body 626 and is formed in a tube shape connected in the upper and lower directions of the double cover upper extension body 626, and its lower end is connected to the other side end of the external inflow pipe 1681. The external air flowing through the external inflow pipe 1681 flows in from the lower end and flows out from the upper end, thereby allowing the external air to be introduced into the interior of the double cover upper extension body 626.

[0178] The external inflow blocking lifting body 684 can be raised and lowered inside the external inflow blocking body 681, is formed into a sphere, and is made of plastic or the like, so it can float on the surface of the external polluted water.

[0179] The external inflow blocking locking body 683 is formed at the upper end of the external inflow blocking body 681 and is formed to have a diameter smaller than the diameter of the external inflow blocking body 681, so that the external inflow blocking lifting body 684 floating along the inside of the external inflow blocking body 681 is stuck, closing the opened upper end of the external inflow blocking body 681.

[0180] The external inflow hole forming panel 682 is formed as a panel that divides the lower space of the external inflow blocking body 681 across, and is formed with an external inflow hole that is relatively smaller than the external inflow blocking lifting body 684 for the external air to flow, but the external inflow blocking lifting body 684 is stuck to prevent the external inflow blocking lifting body 684 from arbitrarily detaching from the outside of the external inflow blocking body 681.

[0181] Normally, when the double cover structure 625 is not immersed, the external inflow blocking lifting body 684 sinks to the lower part of the external inflow blocking body 681 and remains stuck in the external inflow hole forming panel 682, and the external air is introduced through the external inflow pipe 1681. The external air can flow through the external inflow blocking body 681 and then flow into the interior of the double cover structure 625.

[0182] On the other hand, in an emergency situation where the double cover structure 625 is submerged by a flood or the like, the external contaminated water will flow in through the external inflow pipe 1681, and the external contaminated water will accumulate inside the external inflow blocking body 681. Therefore, the external inflow blocking lifting body 684 will also rise to the upper part of the external inflow blocking body 681, so that the external inflow blocking lifting body 684 will be stuck by the external inflow blocking locking body 683 to close the upper end of the external inflow blocking body 681, thereby preventing the external contaminated water that flows in through the external inflow pipe 1681 and accumulates inside the external inflow blocking body 681 from flowing into the interior of the double cover structure 625.

[0183] By setting the external inflow blocking member 680, normally when the double cover member 625 is not immersed, the external air flows into the interior of the double cover member 625 through the external inflow blocking member 680, while when the double cover member 625 is immersed, the external contaminated water can be blocked from flowing into the interior of the double cover member 625 by the external inflow blocking member 680.

[0184] The internal outflow blocking member 685 allows the external air flowing into the interior of the double cover upper extension body 626 to flow into the interior of the removable cover body 621 through the external inflow blocking member 680, but blocks the geothermal exchange water accumulated in the interior of the removable cover body 621 from flowing into the interior of the double cover member 625.

[0185] The geothermal exchange water inside the underground well 10 may be filled up due to various reasons, such as changes in the reflux volume during operation. As mentioned above, when the geothermal exchange water accumulates above the upper part of the removable cover body 621, the internal outflow blocking member 685 can prevent the geothermal exchange water from flowing into the interior of the double cover member 625.

[0186] Specifically, the internal outflow blocking component 685 includes: an internal outflow blocking body 686 , an internal outflow lifting body 689 , an internal outflow blocking locking body 688 , and an internal outflow blocking panel 687 .

[0187] The internal outflow blocking body 686 passes through the double cover body 627 and extends to the space above a predetermined height of the double cover body 627, and is formed into a tubular shape connected to the upper extension body 626 of the double cover in the up and down directions, so that the external air flowing into the interior of the upper extension body 626 of the double cover can flow into the interior of the removable cover body 621 through the external inflow blocking member 680.

[0188] The internal outflow blocking lifting body 689 can be raised and lowered inside the internal outflow blocking body 686, is formed as a sphere, is made of plastic or the like, and can float on the surface of the geothermal heat exchange water.

[0189] The internal outflow blocking locking body 688 is formed at the upper end of the internal outflow blocking body 686 and is formed to have a diameter relatively smaller than the diameter of the internal outflow blocking body 686, so that the internal outflow blocking lifting body 689 floating along the inside of the internal outflow blocking body 686 is stuck, thereby closing the opened upper end of the internal outflow blocking body 686.

[0190] The internal outflow blocking panel 687 is formed as a panel that divides the lower space of the internal outflow blocking body 686 and is formed with an internal inflow hole that is relatively smaller than the internal outflow blocking lifting body 689 for the external air to flow, but the internal outflow blocking lifting body 689 is stuck to prevent the internal outflow blocking lifting body 689 from arbitrarily detaching from the outside of the internal outflow blocking body 686.

[0191] An upper end of the external inflow blocking body 681 of the external inflow blocking member 680 is disposed at a relatively higher position than an upper end of the internal outflow blocking body 686 of the internal outflow blocking member 685 .

[0192] Under normal circumstances when the geothermal exchange water does not flow out to the interior of the removable cover body 621, the internal outflow blocking lifting body 689 sinks to the lower part of the internal outflow blocking body 686, thereby remaining stuck in the internal outflow blocking panel 687, and the external air flowing into the double cover upper extension body 626 through the external inflow blocking member 680 can flow into the interior of the removable cover body 621.

[0193] On the other hand, in an emergency situation where the geothermal exchange water flows out to the interior of the removable cover body 621, the geothermal exchange water accumulates in the interior of the internal outflow blocking body 686, so that the internal outflow blocking lifting body 689 is also lifted to the upper part of the internal outflow blocking body 686, and the internal outflow blocking lifting body 689 is stopped by the internal outflow blocking stopping body 688 to close the upper end of the internal outflow blocking body 686, thereby preventing the geothermal exchange water from flowing into the interior of the double cover member 625.

[0194] By providing the internal outflow blocking member 685, under normal circumstances when the geothermal exchange water does not flow out to the interior of the removable cover body 621, the external air can flow into the interior of the removable cover body 621 through the internal outflow blocking member 685, and in an emergency situation when the geothermal exchange water flows out to the interior of the removable cover body 621 and is filled, the internal outflow blocking member 685 can be used to block the geothermal exchange water from flowing into the interior of the double cover member 625. Therefore, when the geothermal exchange water flows into the double cover member 625, it can be prevented that the geothermal exchange water overflows the outside of the geothermal upper protection heat exchange unit and pollutes the surroundings of the geothermal upper protection heat exchange unit, or that the geothermal exchange water overflows to the outside of the geothermal upper protection heat exchange unit in winter and freezes to cause an accident.

[0195] The above diagrams illustrate specific embodiments of the present invention, but it should be understood that a person skilled in the art may make various modifications and variations to the present invention within the scope of the concept and area of ​​the present invention as described in the appended claims. However, it should be clear that these modifications and variations are within the scope of the claims of the present invention.

[0196] Industrial Applicability

[0197] According to the geothermal upper protection heat exchange unit and the geothermal exchange water flow structure including the geothermal upper protection heat exchange unit according to one aspect of the present invention, the deep well pump can be easily accessed to replace and repair the deep well pump installed inside the underground well, and the geothermal exchange water seeping out of at least one of the multiple underground wells can flow to other underground wells among the multiple underground wells. By adjusting the return amounts of the geothermal exchange water respectively returning to the multiple underground wells, a height difference of the natural water level of the groundwater is formed in each underground well, thereby causing water seepage to occur in a part of each underground well and recharge to occur in other parts of each underground well, thereby activating the flow of the underground aquifer. Without discharging groundwater, the heat exchange efficiency of each underground well can be improved, and the multiple underground wells can be connected to the supply header or the return header through a simple structure, so it can be said that it has high industrial practicality.

Claims

1. A geothermal upper protection heat exchange unit, characterized in that: include: An upper protection hole shell member is installed on an underground well formed underground, with its upper portion exposed to the ground; a pumping pipe member connected to a deep well pump inserted into the underground well so that the geothermal exchange water pumped by the deep well pump is discharged to the outside of the underground well; as well as The upper protection hole detachable cover member is detachably connected to the upper part of the upper protection hole shell member and can cover the upper protection hole shell member. The deep well pump is connected to the pumping pipe component by being connected to the upper protective hole removable cover component, so that when the upper protective hole removable cover component is separated from the upper protective hole shell component, the pumping pipe component connected to the upper protective hole removable cover component and the deep well pump connected to the pumping pipe component can be separated from the upper protective hole shell component as a whole together with the upper protective hole removable cover component.

2. The geothermal upper protection heat exchange unit according to claim 1, characterized in that: The upper protection hole detachable cover member comprises: a detachable cover body detachably connected to the upper portion of the upper protection hole shell member to cover the upper portion of the upper protection hole shell member; and a pumping pipe fixing body, formed at the lower part of the removable cover body, for connecting the pumping pipe member to the removable cover body, The pumping pipeline component comprises: A pumping pipeline body extending from the deep well pump to the removable cover by a predetermined length; a pumping pipe bent body extending from the pumping pipe main body to penetrate the pumping pipe fixed body, a portion penetrating a portion of the pumping pipe fixed body being bent, and a terminal portion of the pumping pipe bent body again penetrating another portion of the pumping pipe fixed body; and A pumping conduit passes through the body and extends from the pumping conduit elbow.

3. The geothermal upper protection heat exchange unit according to claim 2, characterized in that: The geothermal upper protection heat exchange unit comprises: a discharge pipe member extending along the interior of the upper protection hole shell member to the upper portion of the upper protection hole shell member so as to be detachably connected to the pumping pipe through-body, the lower portion of the discharge pipe member protruding toward the external space of the upper protection hole shell member so that the geothermal exchange water pumped by the deep well pump and flowing through the pumping pipe member is discharged to the outside of the upper protection hole shell member; and The discharge backflow check valve is installed on the discharge pipe member, and can prevent the geothermal exchange water flowing through the discharge pipe member from flowing back to the pumping pipe member side.

4. The geothermal upper protection heat exchange unit according to claim 2, characterized in that: The underground well includes an underground well inner pipe which penetrates the underground well at a predetermined interval from the inner wall of the underground well. The deep well pump is arranged inside the underground well inner pipe in a form connected to the pumping pipeline body, so that the geothermal exchange water inside the underground well flows in and then rises. The geothermal upper protection heat exchange unit comprises: The upper protection hole inner tube is arranged to penetrate the upper protection hole shell member in a manner spaced apart from the inner wall of the upper protection hole shell member by a predetermined interval, and the pumping pipeline body penetrates along the interior of the upper protection hole inner tube, and the upper protection hole inner tube is arranged spaced apart from the underground well inner tube by a predetermined interval; and A shrinkage and expansion buffering member connects the underground well pipe and the upper protection hole pipe which are separated from each other, wherein, in order to buffer the shrinkage and expansion of the underground well pipe according to the temperature change of the geothermal exchange water, its length can be changed according to the change of the interval between the underground well pipe and the upper protection hole pipe.

5. The geothermal upper protection heat exchange unit according to claim 4, characterized in that: The shrinkage and expansion buffer member is formed into a bellows shape. When the underground well pipe shrinks and expands according to the temperature change of the geothermal exchange water, the interval between the underground well pipe and the upper protection hole inner pipe changes. At this time, while each fold of the shrinkage and expansion buffer member becomes narrower or spaced apart from each other, the length of the shrinkage and expansion buffer member changes, thereby buffering the expansion and contraction of the underground well pipe according to the temperature change of the geothermal exchange water.

6. The geothermal upper protection heat exchange unit according to claim 3, characterized in that: A return water side inflow pipe is formed at the lower part of the upper protection hole shell component, and the return water side inflow pipe is formed at a position relatively lower than the discharge pipe component by a predetermined height. The return water side inflow pipe is a pipe that allows the geothermal exchange water returning from the demand source to flow into the interior of the upper protection hole shell component. A blocking wall component for blocking the discharge pipe component and the return water side inflow pipe is further formed at the lower part of the upper protection hole shell component to prevent the geothermal exchange water flowing into the interior of the upper protection hole shell component through the return water side inflow pipe from rising arbitrarily toward the discharge pipe component side.

7. A geothermal heat exchange water flow structure, characterized in that: include: A first underground well module, in which a first geothermal upper protection heat exchange unit is connected to a first underground well formed underground; A second underground well module is formed in a form in which a second geothermal upper protection heat exchange unit is connected to a second underground well formed at a predetermined interval from the first underground well in the ground, and is separated from the first underground well module by a predetermined interval; A demand source return pipe allows the geothermal exchange water to flow back from the return header on the demand source side to the first underground well module and the second underground well module side; A first return flow automatic proportional control valve, arranged in the demand source return flow pipeline flowing to the first underground well module, for adjusting the return flow of the geothermal exchange water flowing from the return water header to the first underground well module; A second return flow automatic proportional control valve, arranged in the demand source return flow pipeline flowing to the second underground well module, for adjusting the return flow of the geothermal exchange water flowing from the return water header to the second underground well module; A control unit, capable of controlling the first reflux automatic proportional control valve and the second reflux automatic proportional control valve; as well as The seepage water reinjection well pipe component is used to connect the first underground well module and the second underground well module, so that the recirculation volume is adjusted by the control unit so that the geothermal exchange water seeping from one of the first underground well module and the second underground well module flows into the interior of the other of the first underground well module and the second underground well module.

8. The geothermal heat exchange water flow structure according to claim 7, characterized in that: The first geothermal upper protection heat exchange unit comprises: A first upper protection hole housing member, installed on the first underground well, with the upper portion exposed to the ground; a first pumping pipe member connected to a first deep well pump configured to be inserted into the first underground well, and configured to discharge the geothermal exchange water pumped by the first deep well pump to the outside of the first underground well; a first upper protection hole inner tube, which is arranged to penetrate the first upper protection hole shell member at a predetermined interval from an inner wall of the first upper protection hole shell member; and The first inner tube extension tube is extended from the first upper protection hole inner tube and is formed in a shape protruding to the outside of the first upper protection hole shell member. The second geothermal upper protection heat exchange unit comprises: A second upper protection hole shell member, installed on the second underground well, with the upper portion exposed to the ground; a second pumping pipe member connected to a second deep well pump configured to be inserted into the interior of the second underground well, for discharging the geothermal exchange water pumped by the second deep well pump to the outside of the second underground well; a second upper protection hole inner tube, which is arranged to penetrate the second upper protection hole shell member at a predetermined interval from the inner wall of the second upper protection hole shell member; and The second inner tube extension tube is extended from the second upper protection hole inner tube and is formed in a shape protruding to the outside of the second upper protection hole shell member. The seepage water reinjection well pipe component is used to connect the first inner pipe extension pipe and the second inner pipe extension pipe.

9. A geothermal heat exchange water flow structure, characterized in that: include: A first underground well module, in which a first geothermal upper protection heat exchange unit is connected to a first underground well formed underground; A plurality of second underground well modules are formed in a form in which second geothermal upper protection heat exchange units are respectively connected to a plurality of second underground wells formed at a predetermined interval from the first underground well in the ground, and are separated from the first underground well module by a predetermined interval; The demand source supply pipeline allows the geothermal exchange water to flow from the first underground well module and the second underground well module to the demand source side; A demand source return pipe allows the geothermal exchange water to flow from the demand source side to the first underground well module and the second underground well module side; and A one-side balancing pipe component connects a plurality of the second underground well modules and the demand source return pipe to allow the geothermal exchange water flowing through the demand source return pipe to flow through, and distributes the geothermal exchange water to each of the second underground well modules and allows the geothermal exchange water to flow.

10. The geothermal heat exchange water flow structure according to claim 9, characterized in that: The one side balance pipe component comprises: A balancing tube body on one side is formed into a tube shape with a predetermined length and is hollow inside and perpendicular to the direction of gravity; A one-side balancing pipe inflow pipe protrudes from the lower part of the one-side balancing pipe body and is connected to the demand source return pipe, so that the geothermal exchange water flowing through the demand source return pipe can flow into the interior of the one-side balancing pipe body; and A side balance pipe outlet pipe protrudes from the upper part of the side balance pipe body and is connected to each of the second underground well modules, so that the geothermal exchange water flowing into the side balance pipe body through the side balance pipe inlet pipe flows out to each of the second underground well modules. After the geothermal heat exchange water flowing through the one-side balancing pipe inlet pipe is filled inside the one-side balancing pipe body, it can be distributed to each of the second underground well modules through each of the one-side balancing pipe outlet pipes and flow.

11. The geothermal heat exchange water flow structure according to claim 10, characterized in that: The one-side balancing pipe component includes a one-side water level sensing sensor which is installed on the one-side balancing pipe body and is used for sensing the water level in the one-side balancing pipe body.

12. The geothermal heat exchange water flow structure according to claim 9, characterized in that: The geothermal exchange water flow structure includes a seepage water reinjection well pipe component, which is used to connect the first underground well module and the second underground well module so that the geothermal exchange water seeping from the first underground well module flows into the interior of the second underground well module.

13. The geothermal heat exchange water flow structure according to claim 12, characterized in that: The geothermal exchange water flow structure includes a side seepage balance connecting pipe, which connects the seepage recharge well pipe component and the side balance pipe component, so that at least a portion of the geothermal exchange water that seeps out from the first underground well module and flows through the seepage recharge well pipe component flows into the side balance pipe component.

14. The geothermal heat exchange water flow structure according to claim 13, characterized in that: The geothermal exchange water flow structure includes a one-side module connecting pipe, and the one-side module connecting pipe is formed between each of the second underground well modules to enable the geothermal exchange water to flow between each of the second underground well modules.

15. A geothermal heat exchange water flow structure, characterized in that: include: A plurality of first underground well modules, each of which is connected to a first geothermal upper protection heat exchange unit on each of the plurality of first underground wells formed underground; A plurality of second underground well modules are formed in a form in which second geothermal upper protection heat exchange units are respectively connected to a plurality of second underground wells formed at a predetermined interval from the first underground well in the ground, and are separated from the first underground well module by a predetermined interval; The demand source supply pipeline allows the geothermal exchange water to flow from the first underground well module and the second underground well module to the demand source side; A demand source return pipe allows the geothermal exchange water to flow from the demand source side to the first underground well module and the second underground well module side; as well as A balancing pipe component connects the plurality of the first underground well modules or the plurality of the second underground well modules to the demand source return pipeline to allow the geothermal exchange water flowing through the demand source return pipeline to flow through, and distributes the geothermal exchange water to each of the first underground well modules or each of the second underground well modules and allows it to flow.

16. The geothermal heat exchange water flow structure according to claim 15, characterized in that: The geothermal exchange water flow structure includes a seepage water reinjection well pipe component, which is used to connect the first underground well module and the second underground well module, so that the geothermal exchange water seeping from any one of the first underground well module and the second underground well module flows into the interior of the other one of the first underground well module and the second underground well module.

17. The geothermal heat exchange water flow structure according to claim 16, characterized in that: The balance pipe member includes another balance pipe member, and the other balance pipe member connects the plurality of first underground well modules and the demand source return pipe, so that the geothermal exchange water flowing through the demand source return pipe flows through and distributes the geothermal exchange water to each of the first underground well modules and flows. The geothermal exchange water flow structure includes a seepage balance connecting pipe on the other side, which connects the seepage recharge well pipe component and the other side balance pipe component, so that at least a part of the geothermal exchange water that seeps out from the second underground well module and flows through the seepage recharge well pipe component flows into the other side balance pipe component.

18. The geothermal heat exchange water flow structure according to claim 17, characterized in that: The geothermal exchange water flow structure includes another side module connecting pipe, and the another side module connecting pipe is formed between each of the first underground well modules, so that the geothermal exchange water can flow between each of the first underground well modules.

19. The geothermal upper protection heat exchange unit according to claim 1, characterized in that: The upper protection hole detachable cover member comprises: a detachable cover body detachably connected to the upper portion of the upper protection hole shell member to cover the upper portion of the upper protection hole shell member; and a pumping pipe fixing body, formed at the lower part of the removable cover body, for connecting the pumping pipe member to the removable cover body, The geothermal upper protection heat exchange unit comprises: a double cover member coupled to the upper portion of the removable cover body to seal the interior and exterior of the upper protection hole removable cover member; an external inflow blocking member that allows external air to flow into the interior of the double cover member but blocks external contaminated water from flowing into the interior of the double cover member; and The internal outflow blocking member can allow the external air flowing into the interior of the double cover member to flow into the interior of the removable cover body through the external inflow blocking member, but blocks the geothermal exchange water accumulated in the interior of the removable cover body from flowing into the interior of the double cover member.

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