KR101189079B1 - Geothermal exchanging pile - Google Patents

Abstract

The present invention relates to a ground heat exchange pile, wherein the ground heat exchange pile according to the present invention is installed in a first body made of concrete, and the upper body and the lower end are inserted into the first body so as to open the inflow heat exchange fluid is in communication. A first hollow pipe including a first heat exchange pipe having a pipe and a discharge pipe; And a second body made of concrete and an inlet pipe and an outlet pipe having an upper end opened and inserted into the second body and communicating with a heat exchange fluid, and a connection pipe formed between a lower end of the inlet pipe and an outlet pipe. And a second hollow pipe including a second heat exchange pipe, wherein the inlet pipe and the outlet pipe of the first hollow pipe and the second hollow pipe are coupled in a longitudinal direction so as to communicate with each other, and the second hollow pipe is the lowermost part. Characterized in that, by using the ground heat exchange pile according to the present invention, the first body and the second body of the ground heat exchange pile and at the same time to minimize the distance between the first heat exchange pipe and the second heat exchange pipe and the ground Since the heat is smoothly transferred by the concrete constituting the body, the heat of the ground is efficiently conducted to the heat transfer fluid. Since the conductivity is improved, the performance of the heat exchanger coupled to the ground heat exchange pile is improved.

Description

Ground heat exchange stakes {GEOTHERMAL EXCHANGING PILE}

The present invention is a pile for underground heat exchange, more specifically, by inserting the heat exchange pipe into the pile that is the foundation of the building, it is not necessary to provide a separate site to install the ground heat exchanger, it can be installed in a narrow place In addition, the present invention relates to a ground heat exchange pile having an improved thermal conductivity in which ground heat is transferred to a heat exchange fluid by shortening a distance from the ground.

As an environmentally friendly energy to replace fossil fuels, solar heat or wind power is used, and recently, a method of cooling and heating a building using underground heat, which maintains a constant temperature all year round, has been spotlighted. As such, among the underground heat exchangers that convert underground heat into effective energy, the vertically sealed underground heat exchanger is provided with a U-shaped tube heat exchange pipe in a bore hole formed by drilling the ground, and the heat exchange fluid that transfers underground heat is circulated. Be sure to After the heat exchange pipe is inserted into the borehole, bentonite or cement grout is filled to allow ground heat to be conducted to the heat exchange fluid through the grout material. The grout material used in the underground heat exchanger is constructed for the purpose of preventing thermal short-circuit between the heat exchange fluid flowing in the heat exchange pipe and the ground and preventing groundwater contamination. However, in this case, the building construction process is in progress, and the process of drilling the borehole and laying the heat exchange pipe has to be carried out separately. Therefore, a site for constructing the underground heat exchanger is required and a separate process time is required. There is this.

Conventionally, in order to solve this problem, as shown in Figure 1, by embedding the heat exchange pipes 22, 24 in the pile 10, which is the foundation of the building 3, the heat exchange pipes 22, 24) to secure a site for burial. In this case, however, in order for the heat of the ground 1 to be transferred to the heat exchange pipes 22 and 24, the ground heat must pass through the grout material G inside the pile 10 after passing through the pile 10. Since heat is transferred to the heat exchange pipes 22 and 24 embedded in (G), there is a problem in that the efficiency of the ground heat transfer to the heat exchange fluid flowing through the heat exchange pipes 22 and 24 rapidly decreases. In addition, since the heat exchange pipes 22 and 24 are respectively inserted and installed separately from the pile 10 after the grout material G is first introduced, between the heat exchange pipes 22 and 24 and the grout material G. As bubbles are formed in the thermal short circuit, the thermal conductivity of the underground heat exchange apparatus 5 is lowered.

Therefore, in recent years, there is a need for a ground heat exchange pile coupled to the ground heat exchanger so that ground heat can be smoothly transferred to the heat exchange fluid without having to secure a separate site.

The problem to be solved by the present invention is to provide a pile for ground heat exchange that geothermal heat is smoothly transferred to the heat exchange fluid by minimizing the distance between the heat exchange pipe and the ground while being used as a pile that is the foundation of the building.

The present invention, in order to solve the above problems, the first heat exchanger pipe is provided with a first body made of concrete, the inlet pipe and the discharge pipe is inserted into the first body so that the upper end and the lower end is opened to communicate the heat exchange fluid A first hollow pipe comprising a; And

A second body made of concrete and an inlet pipe and an outlet pipe having an upper end opened and inserted into the second body and communicating with a heat exchange fluid, and a connection pipe formed between a lower end of the inlet pipe and an outlet pipe are provided. A second hollow tube including a second heat exchange pipe,

The inlet pipe and the outlet pipe of the first hollow pipe and the second hollow pipe are coupled to each other in the longitudinal direction in communication with each other, the second hollow pipe provides a ground for heat exchange, characterized in that located at the bottom.

According to one embodiment of the invention, the connection pipe of the second hollow pipe, it is preferable that the curvature is formed in the connection portion between the inlet pipe and the discharge pipe.

In addition, the ground heat exchange pile further comprises a connector coupled between the first heat exchange pipe and the second heat exchange pipe,

Preferably, the connector includes a pipe coupling part coupled to the first heat exchange pipe and the second heat exchange pipe and a packing part protruding between both ends of the pipe coupling part so that the heat exchange fluid does not flow out.

Here, the pipe fastening portion of the connector includes an inlet through which the heat exchange fluid flows in, and an outlet through which the heat exchange fluid flows in and is located opposite to the inlet.

The first heat exchange pipe or the second heat exchange pipe is inserted into the inlet,

The outlet is preferably inserted into the first heat exchange pipe or the second heat exchange pipe.

In addition, the pipe fastening portion, the inlet fastening pipe is formed with the inlet and the discharge pipe is formed with the discharge fastening pipe formed with the outlet,

The packing part includes a pair of packing material fastened to each of the inflow fastening pipe and the discharge fastening pipe,

It is preferable that a flexible bending pipe is connected between the inflow fastening pipe and the discharge fastening pipe.

In addition, the end portion of the first hollow pipe and the second hollow pipe to which the connector is coupled, it is preferable that the packing seating groove is formed in which the packing portion of the connector is coupled.

In addition, the ground heat exchange stake is provided with a plurality of the first hollow pipe coupled in the longitudinal direction,

Between the first heat exchange pipe of the first hollow pipe, a connector including a pipe fastening portion coupled in communication between the first heat exchange pipe and a packing portion protruding between both ends of the pipe fastening portion so that the heat exchange fluid does not flow It is preferable to combine.

In addition, the pipe fastening portion of the connector includes an inlet through which the heat exchange fluid is introduced, and an outlet through which the heat exchange fluid is introduced and is disposed opposite to the inlet.

The first heat exchange pipe is inserted into the inlet,

The outlet is preferably inserted into the first heat exchange pipe.

Here, the pipe fastening portion, the inlet fastening pipe is formed with the inlet and the discharge pipe is formed with the discharge fastening pipe formed with the outlet,

The packing part includes a pair of packing material fastened to each of the inflow fastening pipe and the discharge fastening pipe,

It is preferable that a flexible bending pipe is connected between the inflow fastening pipe and the discharge fastening pipe.

In addition, it is preferable that a packing seating groove is formed at the end of the first hollow pipe to which the connector is coupled to which the packing part of the connector is coupled.

According to the present invention, it is possible to supply environmentally friendly energy that can reduce the amount of fossil fuel used. In addition, the ground heat exchange pile is used as a foundation of a building and at the same time, since the heat exchange fluid moves in the first body and the second body to exchange ground heat, it is possible to install on a narrow site and exchange ground heat. The time taken to construct the construction is shortened. In addition, the ground heat is efficient because the heat transfer is smoothly performed by the concrete constituting the first body and the second body of the ground heat exchange pile while minimizing the distance between the first heat exchange pipe and the second heat exchange pipe and the ground. As the heat conduction fluid is conducted to the heat transfer fluid, the heat conductivity is improved, thereby improving the performance of the heat exchanger coupled to the ground heat exchange pile.

1 is a cross-sectional view of the underground heat exchanger used in the general pile construction method.
2 is a cross-sectional view of the ground heat exchange pile according to an embodiment of the present invention mounted on the ground.
3 is a perspective view of a pile for underground heat exchange according to various embodiments of the present invention.
Figure 4 is a plan view of the ground heat exchange pile according to various embodiments of the present invention.
Figure 5 is an enlarged cross-sectional view of the pile for underground heat exchange according to various embodiments of the present invention.

Hereinafter, the present invention will be described in more detail with reference to preferred embodiments. It will be apparent to those skilled in the art, however, that these examples are provided to further illustrate the present invention, and the scope of the present invention is not limited thereto.

Since the ground heat exchange pile according to the present invention is integrally formed with the pile which is the foundation of the building, it can be constructed even in a narrow place, and the gap between the ground and the heat exchange pipe is installed because the heat exchange pipe is inserted into the body of the pile. By minimizing the heat transfer efficiency of the geothermal heat can be maximized. Here, the ground heat exchange pile may be used in various construction methods, but in the present specification, the ground heat exchange pile constructed in the ground by the embedded pile construction method will be described in order to help understanding. However, the construction method of the ground heat exchange pile according to the present invention is not limited to the embedded pile method.

In the embedded pile method, the ground is pre-excavated to a predetermined depth, the grout material such as cement paste is injected, and the ground heat exchange pile is inserted and fixed to the ground. That is, the ground heat exchange pile according to the present invention including the first hollow pipe 100 and the second hollow pipe 200, as shown in Figure 2, by applying to the embedded pile method, and the ground and heat transfer fluid By minimizing the gap between the geothermal heat can be transferred to the heat transfer fluid efficiency can be maximized, by using the geothermal heat can be converted into energy-friendly energy in the city with high energy consumption. As a grout material used here, it is preferable to use a thing with high thermal conductivity like a cement type grout material. That is, the ground heat can be easily transferred to the heat exchange fluid by using the grout material which can easily transfer the ground heat between the ground and the ground heat exchange pile according to the present invention. In addition, since the first heat exchange pipe 120 and the second heat exchange pipe 220 are in close contact with the first body 110 and the second body 210, respectively, thermal short circuits can be prevented from occurring due to voids. This is improved.

2 is a cross-sectional view of the ground heat exchange pile according to an embodiment of the present invention mounted on the ground.

The apparatus 5 for operating the air-conditioning function using the ground heat can reduce the amount of greenhouse gases generated during the heating and cooling, since the ground heat can replace the fossil fuel. Such a device 5 is air-conditioned by using the ground which is maintained at a constant temperature throughout the year between 50 and 200 m underground. The geothermal heating and cooling system absorbs or releases necessary heat energy through the geothermal heat exchange pile serving as a heat exchanger, and operates the air conditioning system of the building 3 by using a heat exchanger 5 installed on the ground.

The ground heat exchange pile of the present invention used as a foundation of such an air-conditioning system and a building is inserted into and installed in the first body 110 so as to open the first body 110 made of concrete and the upper and lower ends thereof. A first hollow pipe 100 including a first heat exchange pipe 120 provided with an inflow pipe 122 and a discharge pipe 124 communicating therewith; And

The second body 210 made of concrete, the inlet pipe 222 and the discharge pipe 224 and the inlet pipe 222 having an upper end opened to be inserted into the second body 210 and the heat exchange fluid is in communication with each other And a second hollow pipe 200 including a second heat exchange pipe 220 having a connection pipe 226 formed between the lower end of the discharge pipe 224 and

The inlet pipes 122 and 222 and the outlet pipes 124 and 224 of the first hollow pipe 100 and the second hollow pipe 200 are respectively inlet pipes 122 and 222 and outlet pipes 124 and 224. ) Is coupled in the longitudinal direction so as to communicate with each other, the second hollow tube 200 is characterized in that located at the bottom.

The first hollow pipe 100 and the second hollow pipe 200 according to the present invention are fastened in the longitudinal direction, such that the second heat exchange pipe 220 inserted into the second hollow pipe 200 is the first hollow pipe 100. Communication with the first heat exchange pipe (120). Therefore, the first heat exchange pipe 120 and the second heat exchange pipe 220 are combined to form a U-shaped tube as a whole. Therefore, the heat exchange fluid in the inlet pipe 122 of the first heat exchange pipe 120 passes through the inlet pipe 222, the connection pipe 226, and the discharge pipe 224 of the second heat exchange pipe 220 sequentially. The ground heat is transferred to the building through which the heating and cooling operation is performed through the discharge pipe 124 of the first heat exchange pipe 120.

3 is a perspective view of a ground heat exchange pile according to various embodiments of the present invention, and FIG. 4 is a plan view of a ground heat exchange pile according to various embodiments of the present invention.

In the ground heat exchange pile according to an embodiment of the present invention, as shown in FIG. 3, a plurality of first hollow pipes 100 are provided, and the second hollow pipe 200 is disposed at the bottom of the ground heat exchange pile. The first hollow pipe 100 and the second hollow pipe 200 are fastened to be disposed. That is, by fastening the plurality of first hollow pipes 100 in the direction of gravity on one second hollow pipe 200, the depth at which the pile for underground heat exchange is mounted can be adjusted. That is, since geothermal heat is generally maintained at a constant temperature between 50m to 200m underground, it determines the depth of excavation of the ground according to the amount of energy required, according to the depth of the ground where the ground heat exchange pile is to be installed. By adjusting the number, the total length of the ground heat exchange piles can be adjusted.

Here, the second heat exchange pipe 220 of the second hollow pipe 200 may be formed in a U shape by having a straight connection pipe 226, as shown in FIG. 3A, as shown in FIG. 3B. Likewise, by providing a curved connection pipe 226 ', vortices can be prevented from occurring when the heat exchange liquid sequentially moves from the inlet pipe 222' to the connection pipe 226 'and the discharge pipe 224'. have. In addition, the curvature of the connection pipe 226 ′ may be selected in a shape that allows the heat exchange liquid to pass smoothly according to the physical properties of the heat exchange liquid. In addition, the connection pipes 226 ″ and 226 ′ ″ of the second heat exchange pipes 220 ″ and 220 ′ ″ may be provided in a straight line as shown in the plan view of FIG. 4A, and illustrated in FIG. 4B. As described above, a horizontal curvature may be formed in the connection pipe 226 ′ ″ according to the curvature of the second body 210 so that the distance from the ground is constant.

5 is an enlarged cross-sectional view of a pile for underground heat exchange according to various embodiments of the present invention. Here, the connector is illustrated as an example of being coupled between the first hollow tube and the second hollow tube, the connector is also coupled to the same as shown in Figure 5 between the adjacent first hollow tube.

Ground heat exchange pile according to the present invention, the coupling 300 is coupled between the first heat exchange pipe 120 and the second heat exchange pipe 220, or between the adjacent first heat exchange pipe 120 is stacked in the direction of gravity More). The connector 300 includes a pipe fastening part 320 and a packing part 330, the pipe fastening part 320 is coupled to communicate with the first heat exchange pipe 120 or the second heat exchange pipe 220, The packing part 330 is a ring-shaped packing respectively coupled to upper and lower surfaces of the packing seating portion 332 and the packing seating portion 332 which protrude between both ends of the pipe fastening portion 320 so that heat exchange fluid does not flow out. Ash 334. The connector 300 is connected to the ground heat exchange in the same manner regardless of whether it is coupled between the first heat exchange pipe 120 and the second heat exchange pipe 220 or between the first heat exchange pipe 120 at an adjacent position. The same can be applied in the pile. That is, since the ends of the first heat exchange pipe 120 and the second heat exchange pipe 220 to which the connector 300 is applied have the same shape, the connector 300 having the same shape is respectively irrespective of the type of the heat exchange pipe to be coupled. It can be easily coupled to the heat exchange pipe of.

Here, the packing seating grooves 130 and 230 in which the packing part 330 of the connector 300 is formed may be formed at ends of the first hollow pipe 100 and the second hollow pipe 200 on which the connector 300 is mounted. Can be. That is, since the packing portion 330 is inserted into the packing seating grooves 130 and 230, the insertion position of the connector 300 can be more easily confirmed, and the heat exchange fluid is transferred to the outside of the ground heat exchange pile. It can prevent the loss. In particular, among the shape of the connector 300 to be described later, the connector (300 ″, 300 ″ divided into the inflow fastening pipe 321 ″, 321 ′ ″ and the discharge fastening pipe 323 ″, 323 ′ ″) ') In the packing seating grooves 130 and 230, the packing part 330 is seated, so that even if the heat exchange pipe is offset, the packing seating grooves (130, 230) supports the packing part 330 in the connector 300 Is firmly coupled to the first heat exchange pipe 120 and the second heat exchange pipe 220.

In the ground heat exchange pile according to the present invention, a plurality of first hollow pipes (100) and second hollow pipes (200) between the first (300, 300 ', 300' ', 300' '') by installing a connector The heat exchange fluid circulated in the heat exchange pipe 120 and the second heat exchange pipe 220 is not lost to the outside. The connectors 300, 300 ', 300 ", 300' ", as shown in Figs. 5A and 5B, are integral with the pipe fastening portions 320 and 320 ', and are shown in Figs. 5C and 5D. As shown, the pipe fastening part 320 '', 320 '' 'is divided into the inflow fastening pipes 321' ', 321' '' and the discharge fastening pipes 323 '', 323 '' '. Bending tubes 340 '' and 340 '' 'are formed between the pipes 321' 'and 321' '' and the discharge fastening pipes 323 '' and 323 '' '. Here, the connector 300, 300 ′, 300 ″, 300 ′ ″ may be commonly connected to the first heat exchange pipe 120 or the first coupling pipes 320, 320 ′, 320 ″, 320 ′ ″. The inner circumferential surface of the two heat exchange pipes 220 and the inner circumferential surface of the pipe fastening part 320 are formed to coincide. Accordingly, the flow of the heat exchange fluid passing through the first heat exchange pipe 120 or the second heat exchange pipe 220 passes similarly when passing through the connector 300, 300 ′, 300 ″, 300 ′ ″. .

As shown in FIG. 5A, the connector 300 in which the pipe fastening part 320 is integrally formed may be inclined toward both inner surfaces of the outer circumferential surface of the pipe fastening part 320. In addition, as shown in FIG. 5B, one end of the pipe fastening part 320 ′ is formed to be inclined toward the inner circumferential surface, and the other end of the pipe fastening part 320 ′ is formed to be inclined toward the outer circumferential surface. Here, the inlet 322 'is provided at one end of the pipe fastening portion 320' whose inner circumferential surface is inclined toward the outer circumferential surface, and the outlet 324 'is formed of the pipe fastening portion 320' whose outer circumferential surface is inclined toward the inner circumferential surface. It is provided at the other end. That is, the surface in contact with the first heat exchange pipe 120 or the second heat exchange pipe 220 is inclined toward the flow direction of the heat exchange fluid, thereby minimizing the loss of heat exchange fluid to the outside while passing through the connector 300. can do. 5B illustrates the inlet pipes 122 and 222 into the first heat exchange pipe 120 and the second heat exchange pipe 220. In the case of the discharge pipes 124 and 224, the heat exchange fluid moves from the bottom up. Therefore, the connector is mounted opposite to the connector 300 'shown in FIG. 5B.

When stacking the first hollow pipe 100 and the second hollow pipe 200 to form a pile for underground heat exchange, the first hollow pipe 100 and the second hollow pipe 200 within the effective error range of the process The stacking positions are arranged to be offset, or the first heat exchange pipe 120 or the second heat exchange pipe 220 is inserted into the first hollow pipe 100 and the second hollow pipe 200 within an effective error range. It can be formed to deviate from. As such, when the positions of the first heat exchange pipe 120 and the second heat exchange pipe 220 are displaced within an error range during the lamination process or the initial manufacturing process, the pipe fastening unit 320 ″ as shown in FIGS. 5C and 5D. , 320 ''') are divided into inflow pipes (321'',321''') and discharge pipes (323 '', 323 ''') and inflow pipes (321'',323'''). And fittings 300 " and 310 ", in which bending pipes 340 " and 340 "" Therefore, even if the first heat exchange pipe 120 or the second heat exchange pipe 220 is provided at a position that is displaced, the heat exchange fluid can smoothly pass through the connector 300 ″, 300 ′ ″. Therefore, as shown in FIG. 5C, the connector 300 ″ is formed such that the outer circumferential surfaces of the ends of the inflow fastening pipe 321 ″ and the discharge fastening pipe 323 ″ are inclined toward the inner circumferential surface, and the inflow fastening pipe ( 321 ″ and a bending pipe 340 ″ are connected between the discharge fastening pipe 323 ″. In addition, as shown in Figure 5d, the end of the inflow fastening pipe 321 '''is formed such that the inner peripheral surface is inclined toward the outer peripheral surface, the end of the discharge fastening pipe 323''' so that the outer peripheral surface is inclined toward the inner peripheral surface. The connector 300 may be formed. At this time, an inlet 322 '''through which the heat exchange fluid is introduced is located at the end of the inlet conduit tube 321''', and an outlet 324 'at which the heat exchange fluid is discharged at the end of the outlet conduit tube 323'''.'') Is preferred. That is, the surface in contact with the first heat exchange pipe 120 or the second heat exchange pipe 220 is inclined toward the flow direction of the heat exchange fluid, so that the heat exchange fluid passes through the connector 300 ″, 300 ″ ″. The loss to the outside can be minimized. Here, Figure 5d shows the inlet pipes 122, 222 to the first heat exchange pipe 120 and the second heat exchange pipe 220, in the case of the discharge pipe 124, 224 to move the heat exchange fluid from the bottom up Therefore, the connector is mounted opposite to the connector 300 '''shown in FIG. 5D.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100: the first hollow pipe 110: the first body
120: first heat exchange pipe 130, 230: packing seating groove
200: second hollow tube 210: second body
220: second heat exchange pipe 226: connection pipe
300: connector 340: bending tube
122, 222, 222 ', 222'': inlet pipe
124, 224, 224 ', 224'': exhaust pipe
320, 320 ', 320'',320''': Pipe joint
321 '', 321 ''': Inflow Tube
322, 322 ', 322'',322''': inlet
323 '', 323 ''': exhaust pipe
324, 324 ', 324'',324''': outlet
330, 330 ', 330'',330''': Packing Part
332, 332 ', 332'',332''': packing seat
334, 334 ', 334'',334''': packing material

Claims (10)

A first hollow pipe including a first body made of concrete and a first heat exchange pipe inserted into the first body to open the upper end and the lower end and having an inlet pipe and a discharge pipe communicating with the heat exchange fluid; And
A second body made of concrete and an inlet pipe and an outlet pipe having an upper end opened and inserted into the second body and communicating with a heat exchange fluid, and a connection pipe formed between a lower end of the inlet pipe and an outlet pipe are provided. A second hollow tube including a second heat exchange pipe,
Inlet pipe and outlet pipe of the first hollow pipe and the second hollow pipe is coupled to each other in the longitudinal direction to communicate with each other, the second hollow pipe is characterized in that the bottom is located at the bottom. The method of claim 1,
The connecting pipe of the second hollow pipe, the ground heat exchange pile, characterized in that the curvature is formed in the connection portion between the inlet pipe and the discharge pipe. The method of claim 1,
The ground heat exchange pile further includes a connector coupled between the first heat exchange pipe and the second heat exchange pipe,
The connector includes a pipe fastening portion coupled to the first heat exchange pipe and the second heat exchange pipe in communication with each other, and a packing part protruding between both ends of the pipe fastening portion so that the heat exchange fluid does not flow out. Dragon stakes. The method of claim 3,
The pipe fastening portion of the connector includes an inlet through which the heat exchange fluid flows in, and an outlet through which the heat exchange fluid flows in and is located opposite to the inlet.
The first heat exchange pipe or the second heat exchange pipe is inserted into the inlet,
The outlet, the ground heat exchange pile, characterized in that inserted into the first heat exchange pipe or the second heat exchange pipe. The method of claim 4, wherein
The pipe fastening part is provided with an inlet fastening pipe having the inlet and an outlet pipe having an outlet fastening pipe having the outlet formed therein,
The packing part includes a pair of packing material fastened to each of the inflow fastening pipe and the discharge fastening pipe,
The ground heat exchange pile, characterized in that the flexible bending pipe is connected between the inlet and the outlet fastening pipe. The method of claim 3,
The end of the first hollow pipe and the second hollow pipe to which the connector is coupled, the ground heat exchange pile, characterized in that the packing seating groove is formed is coupled to the packing portion of the connector. The method of claim 1,
The ground heat exchange pile is provided with a plurality of the first hollow pipe coupled in the longitudinal direction,
Between the first heat exchange pipe of the first hollow pipe, a connector including a pipe fastening portion coupled in communication between the first heat exchange pipe and a packing portion protruding between both ends of the pipe fastening portion so that the heat exchange fluid does not flow Ground heat exchange pile, characterized in that coupled. The method of claim 7, wherein
The pipe fastening portion of the connector includes an inlet through which the heat exchange fluid flows in, and an outlet through which the heat exchange fluid flows in and is located opposite to the inlet.
The first heat exchange pipe is inserted into the inlet,
The outlet, the ground heat exchange pile, characterized in that inserted into the first heat exchange pipe. 9. The method of claim 8,
The pipe fastening part is provided with an inlet fastening pipe having the inlet and an outlet pipe having an outlet fastening pipe having the outlet formed therein,
The packing part includes a pair of packing material fastened to each of the inflow fastening pipe and the discharge fastening pipe,
The ground heat exchange pile, characterized in that the flexible bending pipe is connected between the inlet and the outlet fastening pipe. The method of claim 7, wherein
The end of the first hollow pipe to which the connector is coupled, the ground heat exchange pile, characterized in that the packing seating groove is formed is coupled to the packing portion of the connector.

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