KR20170052119A - Hot and cool water supply apparatus using geothermal - Google Patents

Abstract

The present invention relates to a cold / hot water supplying apparatus using geothermal heat, and more particularly, to a cold / hot water supplying apparatus using geothermal heat, Even if a heat exchanger for heating or cooling is not installed as in the prior art, it is possible to perform heat exchange using geothermal heat by the pressure change in the heat exchange casing, so that a low-temperature or high- The present invention relates to a cold / hot water supply apparatus using a geothermal heat recoverable.
The cold and hot water supply device using geothermal according to the present invention comprises: a heat exchange casing embedded in an inner wall of a tunnel drilled to a predetermined depth in the ground, the interior of which is sealed; A fluid supply pipe whose one end is disposed on an inner upper side of the heat exchange casing so that fluid can be transferred from the outside into the heat exchange casing; A fluid discharge pipe having one end disposed on an inner lower side of the heat exchange casing so that the fluid having undergone heat exchange through the geothermal heat inside the heat exchange casing can be transferred to the outside; A fluid pumping means for pumping the fluid to be supplied to the fluid supply pipe so that the fluid having undergone heat exchange through the geothermal heat can be recovered through the fluid discharge pipe when the fluid is filled in the heat exchange casing; .

Description

TECHNICAL FIELD [0001] The present invention relates to a hot and cold water supply apparatus using a geothermal heat exchanger,

The present invention relates to a cold / hot water supplying apparatus using geothermal heat, and more particularly, to a cold / hot water supplying apparatus using geothermal heat, Even if a heat exchanger for heating or cooling is not installed as in the prior art, it is possible to perform heat exchange using geothermal heat by the pressure change in the heat exchange casing, so that the required low temperature or high temperature fluid The present invention relates to a cold / hot water supply apparatus using a geothermal heat recoverable.

Geothermal [geothermal; geothermy] refers to the amount of heat that flows from the inside of the earth to the outside through the surface, and in particular, the geothermal heat is emitted from the entire surface of the earth to the outside. The amount of geothermal heat varies widely from region to region, but the average value is 10-6 cal / ㎡ · sec. The outflow of geothermal heat is by heat conduction, gas, hot water and volcanic eruptions.

Geothermal energy is used for power generation in places where there is a large amount of crustal heat flux (such as New Zealand, Italy, and Japan), and it is quite advantageous to use the geothermal heat appropriately from the environmental viewpoint. There is little carbon dioxide emissions and little pollutants. Geothermal heat can be used in various forms such as direct heating, power generation, heating and cooling through heat pumps, and heat for manufacturing.

Meanwhile, in the geothermal heat exchange system, a tube is buried in a basement, a heat exchange pipe is inserted therein, and a pump is connected to an upper end of the heat exchange pipe, that is, a heat exchange pipe exposed to the ground. A heat exchanger (a boiler pipe or an evaporator for cooling) is installed at an end of the heat exchange pipe. Therefore, the heat exchange pipe embedded in the inner surface of the tube maintains a constant temperature by heat exchange with the temperature of the ground, and maintains a low temperature in the summer when the temperature of the ground is high and a high temperature in the winter when the temperature of the ground is low.

Referring to FIG. 1, in the conventional technology disclosed in Korean Patent No. 10-1172656 entitled 'Open Geothermal Exchanging System (100)', a casing 120 is inserted into the vessel 110 and a groundwater inlet is formed at the lower portion thereof. A groundwater pump 130 which is inserted into the casing 120 to pump groundwater, a groundwater supply pipe 140 which supplies groundwater pumped by the water pump 130 to the heat exchanger 150, And a return pipe 160 for returning the groundwater exchanged in the vessel 150 to the inside of the casing. The return pipe 160 is disposed in a space between the wall of the vessel 110 and the casing 120 The bent portion 161 is inserted into the casing 120 near the groundwater inlet of the casing 120 and the end of the return pipe 160 is directed toward the upper portion of the casing 120, Inside A sludge is easily removed, sludge is prevented from rising, clogging of the heart pump is prevented, and life of the heart pump is prolonged.

However, according to the conventional technology as described above, it is possible to reduce the sludge by allowing the groundwater to flow smoothly. However, such an arrangement is an open type geothermal exchange system in which groundwater flows into the casing 120, There is a problem that sludge may be generated and a separate treatment facility for removing sludge is provided and the construction is complicated and since the heart pump must be installed exactly as in the past in order to pump the ground water, In addition, there is a problem that additional replacement cost may be incurred depending on the lifetime of the heart pump, and the energy saving effect is lowered due to excessive operating power cost to pump the ground water.

It is an object of the present invention to solve the above problems and it is an object of the present invention to provide an apparatus and a method for installing a groundwater pumping pump for pumping groundwater by using a natural convection phenomenon, And to provide a cold / hot water supply device using geothermal heat that is economical and economical and maximizes heat exchange efficiency.

It is a further object of the present invention to provide a method and apparatus for removing a sludge such as a conventional open type heat exchange system because it is possible to perform heat exchange through a geothermal heat while not directly contacting groundwater as in an open geothermal exchange system, The present invention also provides a cold / hot water supply device using geothermal heat sources.

In order to accomplish the above object, a geothermal heat exchange system according to the present invention comprises: a heat exchange casing embedded in a hearth drilled at a predetermined depth in the earth and sealed inside; A fluid supply pipe whose one end is disposed on an inner upper side of the heat exchange casing so that fluid can be transferred from the outside into the heat exchange casing; A fluid discharge pipe having one end disposed on an inner lower side of the heat exchange casing so that the fluid having undergone heat exchange through the geothermal heat inside the heat exchange casing can be transferred to the outside; A fluid pumping means for pumping the fluid to be supplied to the fluid supply pipe so that the fluid having undergone heat exchange through the geothermal heat can be recovered through the fluid discharge pipe when the fluid is filled in the heat exchange casing; .

Also, the geothermal heat exchange system according to the present invention comprises: a heat exchange casing embedded in a hearth drilled at a predetermined depth in the ground and having an inside sealed; A fluid supply pipe whose one end is disposed at an inner lower side of the heat exchange casing so that fluid can be transferred from the outside into the heat exchange casing; A fluid discharge pipe having one end disposed on an inner upper side of the heat exchange casing so that the fluid heat exchanged through the geothermal heat inside the heat exchange casing can be transferred to the outside; A fluid pumping means for pumping the fluid to be supplied to the fluid supply pipe so that the fluid having undergone heat exchange through the geothermal heat can be recovered through the fluid discharge pipe when the fluid is filled in the heat exchange casing; .

Also, the geothermal heat exchange system according to the present invention comprises: a heat exchange casing embedded in a hearth drilled at a predetermined depth in the ground and having an inside sealed; A first supply pipe whose one end is disposed on the upper inner side of the heat exchange casing so that the fluid can be transferred from the outside to the inside of the heat exchange casing, and a second supply pipe whose one end is disposed on the inner lower side of the heat exchange casing. and; A first discharge pipe whose one end is disposed at an inner lower side of the heat exchange casing so that the fluid having undergone heat exchange through the geothermal heat inside the heat exchange casing can be transferred to the outside, and a second discharge pipe having one end disposed at an inner upper side of the heat exchange casing, A fluid discharge pipe configured to include a discharge pipe; Fluid pumping means for pumping the fluid to be supplied to the fluid supply pipe so that the fluid having undergone heat exchange through the geothermal heat can be recovered through the fluid discharge pipe when the fluid is filled in the heat exchange casing; A supply valve operable to selectively supply the fluid through the first supply pipe or the second supply pipe and a discharge valve operable to selectively discharge the heat transfer fluid through the first discharge pipe or the second discharge pipe A channel connection valve configured by: A control unit for controlling the operation of the flow path connection valve so that a flow path is connected from the first supply pipe to the first discharge pipe or a flow path is connected from the second supply pipe to the second discharge pipe; .

In addition, in the geothermal heat exchange system according to the present invention, a waterproof layer having a predetermined height is installed on the inner bottom surface of the well, and the heat exchange casing is formed such that the upper part is closed and the lower part is opened, And the inside is sealed.

According to the construction as described above, the geothermal heat exchange system according to the present invention adopts a method capable of heat exchange through the geothermal heat by using the natural convection phenomenon even if the groundwater pumping pump for pumping groundwater is not installed. , It is advantageous in that the operation cost is low and it is very economical and the heat exchange efficiency can be maximized.

Also, since the geothermal heat exchange system according to the present invention can perform heat exchange through the geothermal heat without directly contacting groundwater as in an open geothermal exchange system, a sludge removal operation such as a conventional open type heat exchange system is not required separately, It has advantages in terms of conservation of groundwater environment.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an open type geothermal exchange system according to a conventional example; FIG.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method and apparatus for supplying cold and hot water using geothermal heat.
3 is a cross-sectional view illustrating a geothermal-based cold / hot water supply apparatus according to a second embodiment of the present invention.
FIG. 4 and FIG. 5 are operational states conceptually showing the operation of the cold / hot water supply device using geothermal heat according to the third embodiment of the present invention. FIG.

First, the cold / hot water supplying apparatus using the geothermal heat of the present invention may be composed of the first embodiment, the second embodiment and the third embodiment.

Hereinafter, a cold / hot water supplying apparatus using geothermal heat according to a first embodiment of the present invention (hereinafter referred to as "cold / hot water supplying apparatus") will be described in detail with reference to the embodiments shown in the drawings.

2 is a cross-sectional view showing a geothermal-based cold / hot water supplying apparatus 1 according to a first embodiment of the present invention.

Referring to FIG. 2, the cold / hot water supply device 1 is configured to heat-exchange fluids stored at a high temperature from the ground when the temperature is high as in the summer, and includes a heat exchange casing 11, a fluid supply pipe 12, (13), and fluid pumping means (14).

The heat exchange casing (11) is embedded in the inner tube (1 a) which is perforated to a certain depth in the ground so as to reach the underground where there is almost no change in temperature. The heat exchange casing 11 may be used as a pipe made of PVC or a pipe made of a metal having good corrosion resistance so that corrosion does not easily occur.

In addition, it is preferable that the heat exchange casing (11) has an internal hermetic structure so that the fluid can be circulated therein.

A waterproof layer 1b having a predetermined height is provided on the inner bottom surface of the tube 1a and the heat exchange casing 11 is formed to have a closed top and open bottom so that the bottom is seated on the waterproof layer 1b The inside is sealed.

That is, the heat exchange casing 11 can be easily manufactured and used in the form of a hollow tube, and is provided with an upper cover 11a that can be opened and closed at an upper end thereof to block contaminants from entering the ground, The waterproof layer 1b closes the lower part and closes the inside of the waterproof layer 1b.

In this case, when the heat exchange casing 11 is embedded in the tube 1a, a separate adhesive member may be attached between the lower end portion and the waterproof layer 1b so that the inside of the heat exchange casing 11 can be tightly sealed will be.

The waterproofing layer 1b may be constructed by placing concrete so that the lower end of the heat exchange casing 11 can be stably installed. In the waterproofing layer 1b, groundwater, So that the fluid can be heat-exchanged through the groundwater maintaining the normal temperature.

The fluid supply pipe (12) is configured such that the fluid can be transferred from the outside to the inside of the heat exchange casing (11), and one end is disposed on the upper inner side of the heat exchange casing (11) So that it can be connected to a supply line for supplying fluid from the outside.

The fluid supply pipe 12 may be fixed or supported on the upper cover 11a of the heat exchange casing 11 through a fastening member and the fluid supply pipe 12 may be formed in a hollow tube shape So that the fluid supplied from the outside to the inside of the heat exchange casing 11 can be supplied to the upper side of the inner space of the heat exchange casing 11.

The fluid discharge pipe (13) is configured such that a fluid having undergone heat exchange through geothermal heat in the heat exchange casing (11) can be transferred to the outside, and one end portion is disposed on the lower inner side of the heat exchange casing (11) Can be connected to a discharge line that can be extended outward to recover and store the fluid.

The fluid discharge pipe 13 is formed to have a long hollow pipe shape like the fluid supply pipe 12 so that the fluid that has undergone heat exchange inside the heat exchange casing 11 is discharged to the lower side of the inner space of the heat exchange casing 11 .

The fluid pumping means 14 is configured such that fluid transferred from the external supply line to the inside of the heat exchange casing 11 can be recovered to the external discharge line through the fluid discharge pipe 13.

That is, when the high-temperature fluid is filled in the heat exchange casing 11, the fluid pumping means 14 can recover the fluid having undergone the heat exchange through the geothermal heat through the fluid discharge pipe 13 .

At this time, the fluid pumping means 14 may be configured by a pump installed on the discharge line such that fluid is supplied from the outside through the fluid supply pipe 12. The fluid pumping means 14, that is, the pump, is configured differently from a method of pumping up fluid in a casing where heat exchange is performed through a heart pump, as in the prior art, Since the fluid stored in the outside is only pumped and supplied to the inside of the heat exchange casing 11, the fluid does not easily break down. In particular, as in the conventional art, The pump is not clogged due to the high temperature, and the maintenance is very convenient.

As described above, the fluid supply pipe 12 and the fluid discharge pipe 13 are preferably disposed such that one end of each of the fluid supply pipe 12 and the fluid discharge pipe 13 is disposed at the upper side and the lower side of the heat exchange casing 11, However, the cold / hot water supply device 1 of the present invention having the above-described configuration produces the following operational effects.

2, a fluid at a high temperature, for example, about 20 ° C, is supplied to the upper side of the inner space of the heat exchange casing 11 through the fluid supply pipe 12 and filled in the heat exchange casing 11 The fluid in the high temperature state filled in the internal space of the heat exchange casing 11 is cooled to room temperature by a room temperature geothermal heat such as groundwater of an aquifer maintaining a normal temperature condition, for example, about 15 캜 (占 폚) Heat exchange is performed at a near temperature and at the same time, the higher temperature fluid moves to the upper side due to the natural convection due to the temperature difference within the heat exchange casing (11), and the lower temperature fluid moves toward the lower side.

Therefore, the high-temperature fluid introduced into the heat exchange casing 11 through the fluid supply pipe 12 is heat-exchanged through the geothermal heat in the low temperature state of about 17 캜 (占 폚).

In addition, since the internal space of the heat exchange casing 11 is in a hermetically closed state, when the fluid is continuously supplied by continuing the operation of the fluid pumping means 14, the phenomenon that the air expands in the internal space of the heat exchange casing 11 The fluid stored in the heat exchange casing 11 at a temperature lower than the inner temperature of the heat exchange casing 11 is discharged to the outside through the fluid discharge pipe 13, . ≪ / RTI >

As described above, the cold / hot water supplying apparatus 1 according to the present invention does not have a complicated structure as in the prior art, but when the temperature of the ground is high as in summer, high temperature fluid can be heat- It is possible to increase the efficiency of heat exchange by the geothermal heat, and the groundwater in the aquifers is not contaminated, which is advantageous in terms of preserving the groundwater environment, and the installation cost and operation cost for constructing the heat exchange system through the geothermal heat is very low So that an economical effect is generated.

Hereinafter, a cold / hot water supplying apparatus using geothermal heat according to a second embodiment of the present invention (hereinafter referred to as "cold / hot water supplying apparatus") will be described. For convenience of explanation, Are denoted by the same reference numerals, and redundant description may be omitted.

3 is a sectional view showing a geothermal-based cold / hot water supply device 2 according to a second embodiment of the present invention.

Referring to FIG. 3, the cold / hot water supply device 2 is configured to heat-exchange fluids stored at low temperature from the ground when the temperature is low, such as in winter, and includes a heat exchange casing 11, a fluid supply pipe 12, (13), and fluid pumping means (14).

The cold / hot water supply device 2 is constituted of a heat exchange casing 21 and a fluid pumping means 24 in the same manner as in the first embodiment, and the heat exchange casing 21 is connected to the inner bottom surface of the inner space 1a When the lower portion is seated on the installed waterproof layer 1b, the inside is closed.

It is preferable that one end of each of the fluid supply pipe 22 and the fluid discharge pipe 23 is disposed on the upper side and the lower side of the heat exchange casing 11 so as to have a predetermined height difference therebetween. One end of the fluid supply pipe 22 is disposed on the lower inner side of the heat exchange casing 21 and one end of the fluid discharge pipe 23 is disposed on the upper inner side of the heat exchange casing 21.

That is, the cold / hot water supply device 2 has a symmetrical structure with the cold / hot water supply device 1 according to the first embodiment, and the arrangement structure of the fluid supply pipe 12 and the fluid discharge pipe 13 is It is characterized by the opposite structure.

With the above-described configuration, the cold / hot water supply device 2 according to the second embodiment of the present invention produces the following operational effects.

3, a low-temperature state, for example, about 10 ° C, is supplied to the lower side of the inner space of the heat exchange casing 21 through the fluid supply pipe 22 and filled in the heat exchange casing 21 The fluid in the low temperature state filled in the internal space of the heat exchange casing 21 is cooled to room temperature by a room temperature geothermal heat such as groundwater of an aquifer maintaining a normal temperature condition, for example, about 15 캜 (占 폚) The operation of the fluid pumping means 24 is performed in a state in which the fluid is filled in the space inside the heat exchange casing 21 beyond the height of one end of the fluid discharge pipe 23, The pressure is applied to the fluid filled in the heat exchange casing 21 as in the case of the cold / hot water supply device 1 of the first embodiment. At this time, the pressure in the inside of the heat exchange casing 21 So that the fluid stored in the room temperature state can be recovered to the outside through the fluid discharge pipe (23).

That is, in the cold / hot water supply device 2 according to the second embodiment of the present invention, the low-temperature fluid supplied to the inside of the heat exchange casing 21 through the fluid supply pipe 22 passes through geothermal heat, So that it can be recovered after the heat exchange is performed.

On the other hand, the fluid transferred to the inside of the heat exchange casing 11 can be used as cold water or hot water required for cooling and heating by directly exchanging domestic water used for an index water having a good water quality or a general household, It is not necessary to perform the operation such as circulating the heat exchange medium by means of the heat pump or the like, so that the operation cost is not greatly increased, and the facility cost can be reduced, resulting in a very economical effect.

Hereinafter, a cold / hot water supply device (hereinafter referred to as "cold / hot water supply device") using geothermal heat according to a third embodiment of the present invention will be described. For convenience of explanation, In the embodiment, the same components as those of the same component are denoted by the same reference numerals, and the redundant description may be omitted.

4 and 5 are operation state diagrams conceptually showing the operation of the cold / hot water supply device 3 using geothermal heat according to the third embodiment of the present invention.

Referring to FIGS. 4 and 5, the cold / hot water supply device 3 is configured to allow the cold / hot water supply devices 1 and 2 according to the first and second embodiments to be configured at the same time, And includes a casing 31, a fluid supply pipe 32, a fluid discharge pipe 33, a fluid pumping means 34, a flow passage connecting valve 35 and a control unit 36.

First, the heat exchange casing 31 may be configured in the same manner as the first and second embodiments.

The fluid supply pipe 32 may be configured to transfer fluid from the outside to the inside of the heat exchange casing 31 and may include a first supply pipe 32a and a second supply pipe 32b.

One end of the first supply pipe 32a is disposed on the upper side of the inside of the heat exchange casing 31 and the other end of the first supply pipe 32a passes through the upper end of the heat exchange casing 31, Can be connected to the supply line.

One end of the second supply pipe 32a may be disposed on the lower inner side of the heat exchange casing 31 and the other end may be connected to the supply line, as opposed to the first supply pipe 32a.

The fluid discharge pipe 33 is configured such that the fluid having undergone heat exchange through the geothermal heat inside the heat exchange casing 31 can be transferred to the outside and includes a first discharge pipe 33a and a second discharge pipe 33b .

One end of the first discharge pipe 33a is disposed on the lower inner side of the heat exchange casing 31 and the other end of the first discharge pipe 33a extends through the upper end of the heat exchange casing 31 to be disposed outside, Lt; RTI ID = 0.0 > a < / RTI >

In addition, one end of the second discharge pipe 33b may be disposed on the upper inner side of the heat exchange casing 31, and the other end may be connected to the discharge line.

As described above, the cold / hot water supply device 3 is provided such that each pair of supply pipes and discharge pipes are arranged at a predetermined height difference in the heat exchange casing 31, Operation effects can be generated in the same manner, which will be described in more detail through the following constitution.

On the other hand, the cold / hot water supply device 3 according to the third embodiment of the present invention is connected to the fluid supply pipe 32 and the fluid discharge pipe 33 via the flow path connection valve 35 and the control unit 36, .

The flow path connection valve 35 is connected to a supply valve 35a operated to selectively supply the fluid through the first supply pipe 32a or the second supply pipe 32b, And a discharge valve 35b operated to be selectively discharged through the second discharge pipe 33a or the second discharge pipe 33b.

The control unit 36 controls the flow path connection valve 35 such that the supply valve 35a and the discharge valve 35b are opened to allow fluid to be supplied into the heat exchange casing 31 through the fluid supply pipe 32. [ And controls each operation.

In this case, when the control unit 36 desires to heat-exchange the fluid stored at a high temperature on the ground through the geothermal heat as in the first embodiment, the first discharge pipe 33a So that the flow path is connected.

That is, when the temperature of the ground is high as in the summer, the control unit 36 controls the supply valve 35a such that high temperature fluid can be supplied to the upper side of the heat exchange casing 31 through the first supply pipe 32a And is controlled to be connected to the first supply pipe 32a.

The control unit 36 controls the discharge valve 35b to be connected to the first discharge pipe 35a while the supply valve 35a is connected to the first supply pipe 32a, So that the fluid can be recovered to the outside discharge line.

Therefore, when the fluid is supplied from the external supply line to the inside of the heat exchange casing 31 via the fluid pumping means 34, the cold / hot water supply device 3 can supply the fluid at the upper side of the heat exchange casing 31 And the fluid can be recovered from the lower side, the same operation and effect as the cold / hot water supply device 1 according to the first embodiment can be generated.

In the meantime, when the control unit 36 intends to heat-exchange the fluid stored at low temperature on the ground through the geothermal heat as in the second embodiment, the second discharge pipe 33b So that the flow path can be connected.

In such a case, the controller 36 controls the supply valve 35a so that low-temperature fluid can be supplied to the lower side of the heat exchange casing 31 through the second supply pipe 32b when the temperature of the ground is low, Is controlled to be connected to the second supply pipe 32b and controls the discharge valve 35b to be connected to the second discharge pipe 35b so that fluid is discharged from the upper side of the heat exchange casing 31 to the outside discharge line 35b, .

Therefore, when the fluid is transferred from the external supply line to the inside of the heat exchange casing 31 through the fluid pumping means 34, the cold / hot water supply device 3 supplies the fluid to the lower side of the heat exchange casing 31 And the fluid can be recovered from the upper side, so that the same operational effect as that of the cold / hot water supply device 2 according to the second embodiment can be generated.

That is, through the above-described configuration, the cold / hot water supply device 3 can be easily controlled in the outside environment through the simple control of the control unit 36 even in the summer when the outdoor temperature is high and in winter when the temperature is low, Thus, it is possible to construct a heat exchange system using a geothermal system in which an operation mode can be selected.

The cold and hot water supply device using the geothermal heat described above and shown in the drawings is only one embodiment for carrying out the present invention and should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is defined only by the matters set forth in the following claims, and the embodiments improved and changed without departing from the gist of the present invention are obvious to those having ordinary skill in the art to which the present invention belongs It will be understood that the invention is not limited thereto.

1a Groundwater 1b Waterproof layer
1,2,3 Cold and hot water supply device 11,21,31 Heat exchange casing
12, 22, 32 Fluid supply line 13, 23, 33 Fluid discharge line
14, 24, 34 fluid pumping means 35 flow connection valve
36 control unit

Claims (4)

A heat exchange casing embedded in the interior of the conduit drilled at a certain depth in the earth and having an inside sealed;
A fluid supply pipe whose one end is disposed on an inner upper side of the heat exchange casing so that fluid can be transferred from the outside into the heat exchange casing;
A fluid discharge pipe having one end disposed on an inner lower side of the heat exchange casing so that the fluid having undergone heat exchange through the geothermal heat inside the heat exchange casing can be transferred to the outside;
A fluid pumping means for pumping the fluid to be supplied to the fluid supply pipe so that the fluid having undergone heat exchange through the geothermal heat can be recovered through the fluid discharge pipe when the fluid is filled in the heat exchange casing; The hot and cold water supply device comprising: A heat exchange casing embedded in the interior of the conduit drilled at a certain depth in the earth and having an inside sealed;
A fluid supply pipe whose one end is disposed at an inner lower side of the heat exchange casing so that fluid can be transferred from the outside into the heat exchange casing;
A fluid discharge pipe having one end disposed on an inner upper side of the heat exchange casing so that the fluid heat exchanged through the geothermal heat inside the heat exchange casing can be transferred to the outside;
A fluid pumping means for pumping the fluid to be supplied to the fluid supply pipe so that the fluid having undergone heat exchange through the geothermal heat can be recovered through the fluid discharge pipe when the fluid is filled in the heat exchange casing; The hot and cold water supply device comprising: A heat exchange casing embedded in the interior of the conduit drilled at a certain depth in the earth and having an inside sealed;
A first supply pipe whose one end is disposed on the upper inner side of the heat exchange casing so that the fluid can be transferred from the outside to the inside of the heat exchange casing, and a second supply pipe whose one end is disposed on the inner lower side of the heat exchange casing. and;
A first discharge pipe whose one end is disposed at an inner lower side of the heat exchange casing so that the fluid having undergone heat exchange through the geothermal heat inside the heat exchange casing can be transferred to the outside, and a second discharge pipe having one end disposed at an inner upper side of the heat exchange casing, A fluid discharge pipe configured to include a discharge pipe;
Fluid pumping means for pumping the fluid to be supplied to the fluid supply pipe so that the fluid having undergone heat exchange through the geothermal heat can be recovered through the fluid discharge pipe when the fluid is filled in the heat exchange casing;
A supply valve operated to allow the fluid to be selectively supplied through the first supply pipe or the second supply pipe, and a discharge valve operated to allow the fluid to be selectively discharged through the first discharge pipe or the second discharge pipe A channel connection valve configured;
A control unit for controlling the operation of the flow path connection valve so that a flow path is connected from the first supply pipe to the first discharge pipe or a flow path is connected from the second supply pipe to the second discharge pipe; The hot and cold water supply device comprising: 4. The method according to any one of claims 1 to 3,
A waterproof layer having a predetermined height is provided on an inner bottom surface of the vessel,
Wherein the heat exchange casing is formed so that the upper part is closed and the lower part is opened so that the inside is sealed when the lower part is seated in the waterproof layer.

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