KR101691189B1 - Heating and cooling system using geothermal pipe - Google Patents

Abstract

According to the present invention, a cooling and heating system comprises: a geothermal pipe having an outer pipe vertically stood and having a hollow pipe shape of which the lower end is blocked to be buried in the ground and having an inner pipe of which an outer surface is spaced from the inner surface of the outer pipe, inserted into the outer pipe and having a plurality of through-holes formed on the lower side of the inner pipe in order to enable outdoor air supplied between the outer pipe and the inner pipe to pass through the through-hole to be discharged through the inner space of the inner pipe; a supply pipe connected to the upper end of the inner pipe to guide a flow of the air discharged through the inner pipe; a blower fan mounted in the supply pipe to generate the flow of the air inside the supply pipe; a heat storage unit having a heat storage housing having a chamber structure of which the inner space is separated from the outside, heat storage stone filled inside the heat storage housing, an intake pipe arranged inside the heat storage housing and receiving the air from the supply pipe, and an exhaust pipe arranged inside the heat storage pipe to enable the air supplied to an intake pipe to be introduced via the heat storage stone; and an air supply pipe supplying the air introduced to the exhaust pipe to an indoor space of a building structure.

Description

TECHNICAL FIELD The present invention relates to a heating and cooling system using geothermal pipes,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a cooling and heating system for cooling and heating a room using a geothermal pipe, and more particularly, to a cooling and heating system having improved heat and cold storage efficiency.

The environmental pollution caused by the use of fossil fuels in the modern industrial society is getting worse and the fossil fuels are inevitably exhausted in the near future due to the limitation of the reserves. Therefore, the development and distribution of alternative energy resources that can replace existing fossil fuels while continuing to prevent environmental pollution are continuing.

Renewable energy such as solar energy, wind and geothermal, and new energy technologies such as hydrogen fuel cells have long been an alternative energy source. Geothermal energy is the energy generated by the decay of the radioactive elements of the Earth's crust / mantle and the release of the earth's inner heat. Geothermal energy is classified into deep geothermal resources using geothermal resources at depths of several kilometers underground and deep geothermal resources using a constant temperature during the year within 300m underground.

The recent geothermal heating and cooling system using the above-mentioned geothermal energy is a system in which cooling and heating is operated by a geothermal heat that keeps a constant temperature throughout the year by burping a pipe containing refrigerant in the ground. In Korea, the temperature of the ground is maintained at about 5 ~ 25 ℃. In summer, the heat is transferred to a pipe buried in the underground, and the cool air is cooled again by using the cooler ground temperature. In winter, the cold air in the room is moved to the underground pipe, and the indoor air is converted into hot air using the temperature of the ground which is warmer than the ground.

However, in the conventional geothermal heating and cooling system, the pipe is buried in the ground and the heat or cool air transmitted through the pipe is supplied to the heat pump to heat or cool the room. The internal structure is complicated, There is a disadvantage that commercialization is limited.

In addition, since the conventional geothermal heating and cooling system only transmits hot air and cold air, it does not have a function of purifying the indoor air by being built in the system itself. Therefore, there is another disadvantage that a separate air purifier is additionally required.

KR 20-0357888 Y1

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above problems, and it is an object of the present invention to provide an air conditioner capable of cooling and heating using geothermal heat, And it is an object of the present invention to provide a cooling / heating system having a simple structure, light weight, and improved heat storage performance.

In order to accomplish the above object, the present invention provides an air conditioning and heating system comprising: an outer pipe vertically erected and formed in the shape of a hollow tube with a lower end closed; and an outer pipe inserted into the outer pipe, A geothermal pipe which is composed of an inner pipe spaced apart from an inner surface of the pipe and having a plurality of through holes at a lower side thereof and through which outer air supplied between the outer pipe and the inner pipe passes through the through hole and is discharged through an inner space of the inner pipe; A supply pipe connected to an upper end of the inner pipe to guide a flow of air discharged through the inner pipe; A blowing fan mounted on the supply pipe for generating an air flow in the supply pipe; The present invention relates to a heat storage material for a solar cell, comprising: a regenerative housing having a chamber structure in which an inner space is isolated from the outside; a regenerative stone filled in the regenerative housing; And an exhaust pipe arranged in the heat storage housing so as to allow the air to pass therethrough without allowing the regenerative stone to pass therethrough, A heat storage unit configured to flow into the exhaust pipe; And an air supply pipe for supplying the air introduced into the exhaust pipe to the inside of the building structure.

The bottom surface of the outer pipe is formed in an inclined corn shape so that the middle portion is the lowest, so that a certain amount of condensed water is collected.

The bottom surface of the inner pipe is spaced a certain distance from the bottom surface of the outer pipe.

The inner pipe is made of polyethylene and the outer pipe is made of an aluminum alloy.

And a heat exchanger or a heat pump that is installed in the supply pipe and has an inner flow path through which groundwater flows, and uses the ground water as a heat exchange medium to change the temperature of the air in the supply pipe.

And a waste heat recovery pipe for returning air in the building structure to the supply pipe.

The intake tube is arranged on the lower side of the internal space of the regenerative housing, and the exhaust pipe is arranged on the upper side of the internal space of the regenerative housing.

The heat storage housing includes a step of constructing a wall to surround the excavated part side, a step of constructing a bottom plate on the bottom surface of the excavated part, a step of filling a space surrounded by the wall and the bottom plate with a regenerative stone, And placing the concrete on the upper plate so that the wire mesh is embedded, thereby constructing the upper plate.

A heat insulating layer is provided on the inner surface of the wall, the upper surface of the bottom plate, and the bottom surface of the upper plate.

The geothermal pipe is arranged to pass through the heat storage housing.

The wall of the heat storage housing is inclined in a direction in which the inner space becomes narrower toward the upper side, and one end in the longitudinal direction of the heat supply housing is positioned above the inner space of the heat storage housing.

Wherein one end of the air supply pipe in its lengthwise direction is provided with an expansion part having a cross-

The exhaust pipe is mounted so as to cover the inlet of the expansion portion.

By using the geothermal pipe according to the present invention, it is possible to cool and heat by utilizing the geothermal heat, and it is possible to increase the cooling and heating efficiency by supplying the underground heat or cool air directly to the room, It is possible to supply it to the room afterwards.

1 is a schematic view of an air-conditioning system according to the present invention.
2 and 3 are an exploded perspective view and a cross-sectional view of a geothermal pipe included in the cooling / heating system according to the present invention.
4 to 10 sequentially illustrate the construction of the heat storage unit included in the heating and cooling system according to the present invention.
11 is a schematic view of a second embodiment of the cooling / heating system according to the present invention.
12 shows a structure of a heat storage unit and an air supply pipe included in the third embodiment of the cooling and heating system according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic view of a cooling / heating system according to the present invention, and FIGS. 2 and 3 are an exploded perspective view and a sectional view of a geothermal pipe included in the cooling / heating system according to the present invention.

The cooling / heating system according to the present invention is an air conditioning system for heating and cooling the interior of a building using geothermal heat. The outdoor air is directly heated or cooled in an air-to-air manner to the inside of a building structure, There is one of the biggest features of the configuration in that efficiency can be achieved.

That is, the cooling and heating system according to the present invention includes a geothermal pipe 100 for collecting geothermal heat, a heat storage unit 200 for collecting and accumulating geothermal heat, and an air supply unit for supplying air discharged from the geothermal heat pipe 100 to the heat storage unit 200 And a supply pipe 600 for supplying the air in the storage unit 200 to the interior of the building structure. The geothermal pipe 100 is vertically erected and formed into a hollow tube with its lower end closed A plurality of through holes 122 are formed in the lower portion of the outer pipe 110 and the outer pipe 110 is inserted into the outer pipe 110, And a pipe (120).

When the geothermal pipe 100 is constructed of the double pipe structure, that is, the outer pipe 110 and the inner pipe 120, the outside air supplied from the outside is lowered between the outer pipe 110 and the inner pipe 120 Heat exchange with the geothermal heat is performed and the secondary heat exchanges with the geothermal heat through the through hole 122 formed in the lower end of the inner pipe 120 through the inner space of the inner pipe 120 to improve the heat exchange rate with the geothermal heat Can be obtained.

In this case, when the temperature of the underground is higher than the temperature of the ground, such as winter, since the temperature of the underground is less than that of the ground, the outside air passes through the geothermal pipe 100 and is heated so that it can be used for heating. If the underground temperature is lower than the ground temperature, the outside air passes through the geothermal pipe 100 and is coolly cooled to be usable for cooling.

As described above, the heated air passing through the geothermal pipe 100 can be directly used for heating because it is higher in temperature than outdoor outdoor air in the winter season. However, since the geothermal pipe 100 And a heat storage unit 200 for storing the warm air of the heated air while passing through the heat storage unit 200. The heat storage unit 200 includes a heat storage housing 210 having a chamber structure isolated from the outside and a regenerative stone 240 filled in the regenerative housing 210, (220) formed in the heat storage housing (210) so as to allow air to pass therethrough and to receive air from the supply pipe (300) And an exhaust pipe (230) which is made of a structure capable of passing through the heat storage housing (210) and arranged in the heat storage housing (210). The exhaust pipe 230 is provided with a supply damper 310 for controlling an air flow rate and a flow rate.

The air supplied to the intake pipe 220 through the supply pipe 300 fills the interior of the heat storage housing 210. When the internal pressure of the heat storage housing 210 rises above a reference value, Air is discharged to the inside of the building structure through the exhaust pipe 230 and the air supply pipe 600. At this time, the regenerative stone 240 filled in the regenerative housing 210 is heated while being in contact with the air introduced into the regenerative housing 210. Since the regenerative stone 240 has a property of storing heat energy for a certain period of time, When heat is not required, heat energy is accumulated. When indoor heating is required, a large amount of accumulated heat energy is released, thereby achieving a higher heating effect. It is preferable that the regenerative stone 240 is selected as natural stone so that harmful components are not included in the air discharged into the room.

At this time, the outside air flows into the supply pipe 300 through the geothermal pipe 100, and the air flowing into the supply pipe 300 flows smoothly through the air gap of the regenerative stone 240, A blowing fan 400 for generating an air flow inside the supply pipe 300 should be mounted.

The intake pipe 220 and the exhaust pipe 230 may be arranged in any pattern if they are spaced apart with the regenerative stone 240 interposed therebetween. However, when the intake pipe 220 is installed on the exhaust pipe 230, 220 may contain foreign substances, the foreign substances may be introduced into the intake pipe 220, thereby deteriorating the quality of the air supplied to the interior of the intake pipe 220. Therefore, the intake pipe 220 may be arranged on the lower side of the internal space of the regenerative housing 210, and the exhaust pipe 230 may be arranged on the upper side of the internal space of the regenerative housing 210.

When a difference between the external temperature of the ground and the ground temperature is greater than a reference value, dew is formed in the geothermal pipe 100 while the outside air passes through the geothermal pipe 100. When the dew is accumulated in a certain amount, Condensation water is filled in the lower side of the pipe 110. As described above, the bottom surface of the inner pipe 120 should be spaced a certain distance from the bottom surface of the outer pipe 110 so that condensation water can be filled at a certain level below the outer pipe 110.

When the condensed water is filled in the lower portion of the outer pipe 110 as described above, when the outside air introduced into the space between the outer pipe 110 and the inner pipe 120 contains dust or foreign matter, the lowered outside air passes through the through hole 122 The dust or foreign matter falls into the condensed water in the process of switching the flow direction of the water, and only clean air passes through the inside space of the internal pipe 120.

In other words, if the condensed water is filled in the lower side of the outer pipe 110, the purifying function for purifying the outside air can be performed. Thus, the indoor air of the building structure can be provided with clean air. The air passing through the inside space of the inner pipe 120 is physically filtered once again through the regenerative stone 240 so that the air supplied to the interior of the building structure can be cleaned cleanly .

On the other hand, if the level of the condensed water filled in the lower side of the outer pipe 110 becomes higher than the height of the through hole 122, the flow of the outside air can not be normally performed. Therefore, when the condensed water level rises above the reference value, It is desirable to mount a submerged pump equipped with the automatic level detecting sensor in the inner pipe 120 to maintain the level of the condensed water. The underwater pump level sensor may be connected to a monitoring system for management so that an administrator can check the level of the water level.

When the dew is formed on the inner surface of the inner pipe 120 when the dew is formed due to the temperature difference between the outside air and the ground, the humidity of the air passing through the inner space of the inner pipe 120 may be very high. Therefore, in the cooling / heating system according to the present invention, the inner pipe 120 is made of synthetic resin so that the dew is not formed in the inner pipe 120 but can be formed only in the outer pipe 110, It is preferable to be made of a metal having high thermal conductivity so as to be able to pass through the surface. At this time, both the inner pipe 120 and the outer pipe 110 should be excellent in water resistance and chemical resistance. The inner pipe 120 is made of polyethylene, and the outer pipe 110 minimizes the heat loss of the soil layer It is preferable to be made of an aluminum alloy which can be delivered while being supplied.

When the cooling / heating system according to the present invention is used for cooling, the air passing through the geothermal pipe 100 is cooled to have a temperature lower than that of the outside air by a certain level, but the outside air is very hot, The outside air may not be cooled down cool enough to feel cool even if the outside air passes through the geothermal pipe 100. Therefore, the heating / cooling system according to the present invention may further include a heat exchanger 500 or a heat pump (not shown) for exchanging heat between the air in the supply pipe 300 and the groundwater so that the air passing through the geothermal pipe 100 may be further cooled. May be additionally provided.

The heat exchanger 500 is provided with an internal flow passage through which the groundwater pumped by the pump 510 flows. The heat exchanger 500 exchanges heat between the air passing through the geothermal pipe 100 and the groundwater, so that the air can be cooled more coolly. At this time, the heat exchanger 500 can be manufactured in any structure as long as it can perform heat exchange between the air passing through the geothermal pipe 100 and the groundwater.

On the other hand, the air inside the building structure must be discharged to the outside by the amount of air discharged into the interior of the building structure through the air supply pipe 600. Since the indoor air is heated or cooled to a certain level, The indoor air is warmer than the outside air in winter, and if the indoor air is directly discharged to the outside, the heat energy is wasted.

Therefore, it is preferable that the air-conditioning system according to the present invention is configured not to discharge the air discharged outdoors to the atmosphere, but to recover the air to the supply pipe 300 so that the warm air or the cold air of the indoor air can be reused. That is, the heating / cooling system according to the present invention may further include a waste heat recovery pipe 700 for returning the air in the building structure to the supply pipe 300. At this time, the waste heat recovery pipe 700 is provided with a recovery damper 710 for controlling an air flow rate.

When the waste heat recovery pipe 700 is provided, the air in the interior of the building is once again passed through the heat storage unit 200, so that it is heated more warmly in winter and cooler in summer, Effect can be obtained.

4 to 10 sequentially show a construction process of the heat storage unit 200 included in the heating and cooling system according to the present invention.

It is preferable that the heat storage housing 210 included in the heating and cooling system according to the present invention is made of concrete so as to be rigid enough to be filled with a large amount of regenerated stone 240 therein and to be easily manufactured on site.

In order to manufacture the heat storage housing 210, a wall body 212 is firstly installed to surround the excavated part side as shown in FIG. 4, and a geothermal heat is generated in the excavation space surrounded by the wall 212 as shown in FIG. The bottom plate 214, the intake pipe 220, and the exhaust pipe 230 are installed as shown in FIGS. 6 and 7 after the pipe 100 is disposed.

8, the space surrounded by the wall body 212 and the bottom plate 214 is filled with the regenerative stone 240, and the space between the wall body 212 and the bottom plate 214 is filled with the heat accumulating stone 240, The top plate 250 and the wire mesh 260 are placed on the regenerated stone 240 and then the top plate 250 is placed so that the wire mesh 260 is embedded as shown in FIG. The concrete is poured into the cavity 216.

In the heat storage housing 210 manufactured in this manner, the inner space filled with the regenerative stone 240 is completely isolated from the outside, so that the heat energy stored in the regenerative stone 240 is not easily released to the outside. At this time, a heat insulating layer (not shown) is additionally provided on the inner surface of the wall body 212, the upper surface of the bottom plate 214 and the bottom surface of the upper plates 250 and 216, It may be constructed.

11 is a schematic view of a second embodiment of the cooling / heating system according to the present invention.

The cooling and heating system according to the present invention may include a waste heat recovery tank 800 for transferring thermal energy to the outside air flowing into the geothermal pipe 100 so that the outside air can be preheated to a certain extent and then supplied to the geothermal pipe 100 have. If the outside air is preheated by the waste heat recovery tank 800 and then supplied to the geothermal pipe 100, even if the outside air temperature is very low, the air supplied to the supply pipe 300 can be heated above the reference value, The effect of improving the efficiency can be obtained.

The heating and cooling system according to the present invention generates hot air using heated air while passing through the geothermal pipe 100 so that the heat storage unit 200 can store very high heat, A heat pump may be additionally provided. At this time, the heat pump is applied to a conventional geothermal heating / cooling system in various structures, and thus detailed description of the internal structure and operating principle of the heat pump will be omitted.

12 shows the structure of the heat storage unit 200 and the air supply pipe 600 included in the third embodiment of the cooling / heating system according to the present invention.

1 to 11, when the heat storage housing 210 is formed in a rectangular parallelepiped shape and the intake pipe 220 and the exhaust pipe 230 are installed at one corner, the heat storage housing 210 The air located at one corner (upper right corner in FIG. 1) of the heat storage housing 210 in the air supplied to the inside of the heat storage housing 210 can not flow smoothly into the exhaust pipe 230. If the air inside the heat storage housing 210 is not introduced into the exhaust pipe 230, the utilization of the regenerated stone 240 may be reduced.

The heating and cooling system according to the present invention can maximize the utilization of the regenerated stone material 240 filled in the heat storage housing 210 such that the air supplied to the interior of the heat storage housing 210 through the intake pipe 220 is exhausted through the exhaust pipe The wall 212 of the heat storage housing 210 is inclined in a direction in which the inner space becomes narrower toward the upper side so that the heat storage pipe 600 can be introduced into the heat storage housing 210, As shown in FIG.

12, the one end of the air supply pipe 600 is provided with an expanded portion 610 having a larger cross-sectional area as it goes downward. The outer surface of the annular portion 610 is connected to the heat storage housing 210 As shown in FIG.

When the expanding unit 600 is provided with the expansion unit 610 at the end of the funnel 600 in the shape that the funnel is turned upside down by the heat storage housing 210 as described above, the air supplied through the intake pipe 220 is exhausted to the exhaust pipe 230 So that it is advantageous that all the thermal storage stones 240 can be utilized, that is, the cooling and heating efficiency can be increased.

At this time, the exhaust pipe 230 is installed so as to cover the inlet of the expansion pipe portion 610, and the regenerative stone 240 can not flow into the exhaust pipe 230, but only air flows into the exhaust pipe 230.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the present invention is not limited to the disclosed exemplary embodiments. It will also be appreciated that many modifications and variations will be apparent to those skilled in the art without departing from the scope of the invention.

100: geothermal pipe 110: outer pipe
120: inner pipe 122: through hole
200: heat storage unit 210: heat storage housing
212: wall 214: bottom plate
216: upper plate 220: intake pipe
230: exhaust pipe 240: regenerated stone
250: top plate 260: wire mesh
300: supply pipe 400: blowing fan
500: Heat exchanger 600: Supply pipe
700: waste heat recovery pipe 800: waste heat recovery tank

Claims (12)

And an outer pipe 110 inserted into the outer pipe 110 and spaced apart from an inner surface of the outer pipe 110, And an inner pipe 120 having a plurality of through holes 122 formed on a lower side thereof so that outside air supplied to the space between the outer pipe 110 and the inner pipe 120 passes through the through hole 122, 120) through the inner space of the geothermal pipe (100);
A supply pipe 300 connected to an upper end of the inner pipe 120 to guide the flow of the air discharged through the inner pipe 120;
A blowing fan 400 installed in the supply pipe 300 to generate an air flow in the supply pipe 300;
The present invention relates to a heat storage stones 240 that are filled in a heat storage housing 210 and a heat storage housing 210 in which the heat storage stones 240 can not pass, (220) for receiving air from the supply pipe (300) and arranged in the regenerative housing (210), and a structure in which the regenerative stone (240) can not pass and air can pass through And an exhaust pipe 230 arranged in the heat storage housing 210 so that the air supplied to the intake pipe 220 flows into the exhaust pipe 230 through the regenerative stone 240 200);
An air supply pipe (600) for supplying the air introduced into the exhaust pipe (230) to the interior of the building structure;
And the air-conditioning system comprises:
The method according to claim 1,
Wherein a bottom surface of the outer pipe (110) is formed in an inclined corn shape so that a center portion thereof is lowest, so that a predetermined amount of condensed water is collected.
The method of claim 2,
Wherein a bottom surface of the inner pipe (120) is spaced a certain distance from a bottom surface of the outer pipe (110).
The method according to claim 1,
Wherein the inner pipe (120) is made of polyethylene, and the outer pipe (110) is made of an aluminum alloy.
The method according to claim 1,
The apparatus further includes a heat exchanger (500) or a heat pump which is provided with an internal flow passage through which the ground water flows, and uses the ground water as a heat exchange medium to change the temperature of air in the supply pipe (300) Air conditioning system.
The method according to claim 1,
Further comprising a waste heat recovery pipe (700) for returning air in the building structure to the supply pipe (300).
Claim 1
Wherein the intake pipe (220) is arranged on the lower side of the internal space of the regenerative housing (210), and the exhaust pipe (230) is arranged on the upper side of the internal space of the regenerative housing (210).
The method according to claim 1,
The heat accumulating housing 210 includes a step of constructing the wall 212 to surround the excavation site side and a step of constructing the bottom plate 214 on the bottom surface of the excavation site, Installing the top plate 250 and the wire mesh 260 after filling the space enclosed with the regenerated stone 240 into the space surrounded by the top plate 250 and the wire mesh 260, And the upper plate (250) and the lower plate (216) are installed.
The method of claim 8,
Wherein a heat insulating layer is provided on an inner surface of the wall body (212), an upper surface of the bottom plate (214), and a bottom surface of the upper plates (250) and (216).
The method of claim 8,
Wherein the geothermal pipe (100) is arranged to pass through the heat storage housing (210).
The method of claim 8,
The wall 212 is inclined in a direction in which the inner space becomes narrower toward the upper side of the thermal storage housing 210 and one end in the longitudinal direction of the heat supply pipe 600 is positioned above the inner space of the thermal storage housing 210 And the air-conditioning system.
The method of claim 11,
The air supply pipe 600 is provided at one longitudinal end thereof with an expanded portion 610 having a larger cross-
Wherein the exhaust pipe (230) is mounted so as to cover the inlet of the expansion pipe (610).

Images