JPH0814428B2 - Geothermal heat extraction device - Google Patents

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a geothermal heat extraction device which can be used for cooling in summer, heating in winter, and snow removal by using geothermal heat.

2. Description of the Related Art Conventionally, the use of geothermal heat has been about 15
An air pipe that allows air to pass through is installed in the groundwater at ℃, and the air is cooled or warmed to the temperature of the groundwater while passing through the air pipe.

[0002]

Problems to be solved by the present invention are that conventional geothermal heat is used to cool or warm air by the temperature of groundwater while passing through an air pipe installed in groundwater. Cooling, warming effect is low, air
The drawback is that if the volume of groundwater around the pipe is not increased, the temperature of the groundwater near the airpipe will rise or fall due to the air passing through the airpipe, reducing the cooling or warming effect. was there.

In view of the above-mentioned conventional drawbacks, the present invention has been made.
A geothermal heat extraction device that can keep the temperature of groundwater constant at all times without increasing the volume of circulation of groundwater, can always obtain cooling or warming at a constant temperature, and can also use groundwater as well water. It is intended to be provided.

The above and other objects and novel characteristics of the present invention will be read in the following description with reference to the accompanying drawings.
It will be more completely clear. However, the drawings are for explanation only and do not limit the scope of the present invention.

[0005]

In order to achieve the above object, the present invention has an upper end located at or near the ground,
A geothermal heat extraction tank whose bottom end is buried in the ground to a depth where geothermal heat can be taken out, a pumping pipe capable of pumping groundwater penetrating the geothermal heat extraction tank, and a granite filled in the geothermal heat extraction tank. , A heat medium such as sesame stone,
An air supply device for supplying air from the lower end of the geothermal heat extraction tank, and a heat storage tank having a larger diameter than the geothermal heat extraction tank buried in the ground so that the upper end is located on the ground or near the ground. A communication pipe that communicates the lower end of the heat storage tank with the upper end of the geothermal extraction tank, an exhaust duct attached so as to communicate with the upper end of the heat storage tank, and a penetrating inside of the heat storage tank. A ground heat extraction device is constituted by a heat storage tank pumping pipe capable of pumping ground water to be stored and a heat storage medium such as boulders filled in the heat storage tank.

[0006]

In the geothermal heat extraction device configured as described above, the air supplied to the lower part of the geothermal heat extraction tank by the air supply device passes through the geothermal heat extraction tank filled with the heat medium and is cooled or warmed while being heated. Flow through the communication pipe from the upper part, flow into the heat storage and extraction tank at the lower position, and are stored in the heat storage and extraction tank.

The cooled or warmed air stored in the heat storage tank is discharged to the outside through the discharge duct.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the embodiments shown in the drawings.

In the first embodiment of the present invention shown in FIGS. 1 to 3, reference numeral 1 denotes a boring formed by boring in the ground where the upper end is located on the ground and the lower end is deep enough to take out geothermal heat. -
The geothermal heat extraction tank is buried in the ring hole 2. The geothermal heat extraction tank 1 has, for example, a diameter of 25 cm and a length of 1100 cm, and both ends thereof are closed plates 1.
What is formed by carbon steel pipes for piping sealed by a and 1b is used.

Reference numeral 3 denotes a pumping pipe which penetrates the inside of the geothermal heat extraction tank 1 and can pump groundwater at a lower position of the geothermal heat extraction tank 1. The pumping pipe 3 has a diameter of
For example, a pump having a diameter of 2 centimeters is used and is connected to the pumping pump 4 on the ground.

Reference numeral 5 is a heat medium such as granite or sesame filled in the geothermal heat extraction tank 1. The heat medium 5 has a relatively small size.

Reference numeral 6 denotes an air supply device for supplying air from the lower end of the geothermal heat extraction tank 1 to the inside.
Has one end communicated with the lower end of the geothermal extraction tank 1,
The other end of the air supply pipe 7 is projected to the ground along the geothermal heat extraction tank 1, the check valve 8 is installed in the above-ground part of the air supply pipe 7, and the air supply pipe 7 is provided. And a blower 9 attached to the end of the. In the winter, the air blown by the blower 9 may be air warmed by wind power generation.

Reference numeral 10 denotes a heat storage tank having a diameter larger than that of the geothermal heat extraction tank 1 buried in a boring hole 11 formed by boring in the ground so that the upper end is located in the ground near the ground. The heat storage tank 10 is, for example, a steel pipe having a diameter of 100 cm and a length of 450 cm, which is sealed at both ends by closing plates 10a and 10b.

Reference numeral 12 is a communication pipe that connects the lower end of the heat storage tank 10 and the upper end of the geothermal heat extraction tank 1.

Reference numeral 13 denotes an exhaust duct connected to an indoor air-blowing device 14 mounted so as to communicate with the upper end portion of the heat storage tank 10. The exhaust duct 13 has a pressure inside the heat storage tank 10. An automatic pressure switch 15 and a pressure gauge 16 are provided for discharging outside when the value exceeds a predetermined value.

Reference numeral 17 denotes a heat storage pump for penetrating the inside of the heat storage tank 10 and capable of pumping groundwater at a lower position of the heat storage tank 10.
7 has a diameter of 2 cm, for example,
It is connected to the heat storage pump 18 on the ground.

Reference numeral 19 denotes a heat storage medium such as boulders filled in the heat storage tank 10. The heat storage medium 19 is the heat medium 5
Larger size is used.

Reference numeral 20 denotes a temperature-measuring heat-sensitive pipe mounted on the heat-storage tank 10 for measuring the temperature in the heat-storage tank 10. The temperature-measuring heat-sensitive pipe 20 has a temperature sensor 21 for measuring the temperature. Installed.

The geothermal heat take-out device 22 having the above structure supplies air from the lower part of the geothermal heat take-out tank 1 by the air supply device 6.

The air supplied into the geothermal heat extraction tank 1 passes through the heat medium 5 and rises while being cooled or warmed. The rising air passes through the communication pipe 12 and enters the inside of the heat storage tank 10 from the lower part thereof,
It can be stored in 0. In this case, the heat storage medium 19 in the heat storage tank 10 is stored while being cooled or warmed, and when the inside of the heat storage tank 10 reaches a predetermined pressure or more, the exhaust duct 13
It is released to the outside by the automatic pressure switch 15 of.

When used, the air blower 14 in the room is turned on so that the cooled or warmed air in the heat storage tank 10 passes through the discharge duct 13 and the air blower 14 is turned on. More blown out.

By pumping groundwater with the pumping pump 4, the heat medium 5 in the geothermal extraction tank 1 can be cooled or warmed with groundwater via the pumping pipe 3, and the heat pumping pump 18 can be used. By pumping the groundwater, the heat storage medium 19 in the heat storage tank 10 can be cooled or warmed by the groundwater via the heat storage tank pumping pipe 17 and adjusted.

[0023]

Different Embodiments of the Present Invention Next, different embodiments of the present invention shown in FIGS. 4 to 7 will be described. In describing these different embodiments of the present invention, the first embodiment of the present invention will be described.
The same components as those of the embodiment are denoted by the same reference numerals, and overlapping description will be omitted.

The second embodiment of the present invention shown in FIGS. 4 and 5 is mainly different from the first embodiment of the present invention in that it has a heat storage medium 19 and a backup pipe 17 for a heat storage tank. The heat storage tank 23 is installed in the ground, one end is connected to the communication pipe 12, and the other end is connected to the lower part of the heat storage tank 23. The communication pipe 25, the upper portion of the preliminary heat storage tank 23 and the heat storage tank 10 are communicated with each other, and the preliminary heat storage tank 23
Check valve 2 that allows only the flow from the tank to the heat storage tank 10
The geothermal heat extraction device 22A configured as described above can be stored in the preliminary heat storage tank 23 when a larger amount of air is supplied than that discharged through the discharge duct 13 in that the connection pipe 27 provided with 6 is installed. If the air discharged from the discharge duct 13 is larger than that supplied from the communication pipe 12, the air in the preliminary heat storage tank 23 is connected to the connection pipe 27.
Is supplied to the heat storage tank 10. A copper pipe 23a having a high thermal conductivity is used in the lower portion of the preliminary heat storage tank 23 so that the geothermal heat can be efficiently taken out.

The third embodiment of the present invention shown in FIGS. 6 and 7 is mainly different from the first embodiment of the present invention in that
In the point that the pumping pipe 3 and the pumping pipe 17 for the heat storage tank are connected to the pumping pump 4 through the switching valve 28, the geothermal heat extraction device 22B configured as described above is also the same as the first embodiment of the present invention. Similar effects can be obtained.

When the present invention is used only for cooling, by burying a geothermal extraction tank or a heat storage tank in the clay layer silt layer from the top soil to the underground 4 matles to 10 metres, 8 ° C. to 9 ° C. The low temperature of can be collected.

Further, when the present invention is used only for heating, the geothermal extraction tank and the heat storage tank descend from the underground 10 mitres and thereafter toward the depth by 1 ° C. for each mate.
As the temperature rises, it is better to dig it down to the temperature you want to take out and bury it.

[0028]

As is apparent from the above description, the following effects can be obtained in the present invention.

(1) A geothermal heat extraction tank whose upper end is located at or near the ground and whose lower end is buried in the ground to a depth where geothermal heat can be taken out, and groundwater which penetrates through this geothermal heat extraction tank is pumped. A pumping pipe that can be used, a heat medium such as granite or sesame stone filled in the geothermal extraction tank, an air supply device that supplies air from the lower end of the geothermal extraction tank to the ground or the upper end. A heat storage tank having a larger diameter than the geothermal extraction tank buried in the ground so as to be located near the ground, and a communication pipe connecting the lower end of the heat storage tank and the upper end of the geothermal extraction tank, A discharge duct mounted so as to communicate with the upper end of the heat storage tank, a pump pipe for a heat storage tank capable of pumping groundwater penetrating through the heat storage tank, and the heat storage tank The air discharged from the exhaust duct is the same as the humidity of the air supplied by the air supply device, as it is composed of a heat storage medium such as boulders filled in. It can be surely prevented.

(2) Since the air cooled or warmed by passing through the geothermal heat extraction tank by the above (1) is stored in the heat storage tank, the temperature of the air discharged from the discharge duct is always kept constant. be able to.

(3) According to the above (1), the air passing through the geothermal extraction tank can be efficiently brought to the groundwater temperature by the heat medium.

(4) According to the above (1), the groundwater pumped up by the pumping pipe can be used as well water, and the temperature in the geothermal extraction tank can be detected or the heat medium can be efficiently brought to the groundwater temperature.

(5) According to the above (1), the air that has been supplied into the heat storage tank and has passed through the geothermal heat extraction tank is stored in the heat storage medium, and the temperature change can be efficiently prevented.

(6) According to the second aspect, the same effects as the above (1) to (5) can be obtained.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a first embodiment of the present invention.

FIG. 2 is an explanatory view of a geothermal heat extraction tank.

FIG. 3 is an explanatory view of a heat storage tank.

4 and 5 are explanatory views showing a second embodiment of the present invention.

6 and 7 are explanatory views showing a third embodiment of the present invention.

[Explanation of symbols]

1: Geothermal extraction tank, 2: Boring hole, 3: Pumping pipe, 4: Pumping pump, 5: Heat medium, 6: Air supply device, 7: Air supply pipe, 8: Check valve, 9: Blower, 10: heat storage tank, 11: boring hole, 12: communication pipe, 13: discharge duct, 14: air-blowing device, 15: automatic pressure switch, 1
6: Pressure gauge, 17: Pumping pipe for heat storage tank, 1
8: Heat storage pump, 19: Heat storage medium,
20: temperature measurement heat sensitive pipe, 21: temperature sensor,
22, 22A, 22B: Geothermal heat extraction device, 23: Preliminary heat storage tank, 24: Pressure valve, 25: Preliminary communication pipe, 26: Check valve, 27: Connection pipe, 28: Switching valve.

Claims (2)

[Claims] 1. A geothermal heat extraction tank having an upper end located at or near the ground and a lower end buried in the ground to a depth where geothermal heat can be taken out, and pumping groundwater penetrating through the geothermal heat extraction tank. Pumping pipe, a heat medium such as granite or sesame stone filled in the geothermal extraction tank, an air supply device for supplying air from the lower end of the geothermal extraction tank to the ground or the ground. A heat storage tank having a diameter larger than that of the geothermal extraction tank buried in the ground so as to be located in the vicinity, a communication pipe that connects the lower end of the thermal storage tank and the upper end of the geothermal extraction tank, and A discharge duct attached so as to communicate with the upper end of the heat storage tank, and a heat storage tank pumping pipe capable of pumping groundwater penetrating the heat storage tank,
A geothermal heat extraction device comprising a heat storage medium such as boulders filled in the heat storage tank. 2. A geothermal heat extraction tank having an upper end located at or near the ground and a lower end buried in the ground to a depth capable of extracting geothermal heat, and pumping groundwater penetrating through the geothermal heat extraction tank. Pumping pipe, a heat medium such as granite or sesame stone filled in the geothermal extraction tank, an air supply device for supplying air from the lower end of the geothermal extraction tank to the ground or the ground. A heat storage tank having a diameter larger than that of the geothermal extraction tank buried in the ground so as to be located in the vicinity, and a communication pipe that connects the lower end of the thermal storage tank and the upper end of the geothermal extraction tank, and A discharge duct attached so as to communicate with the upper end of the heat storage tank, and a heat storage tank pumping pipe capable of pumping groundwater penetrating through the heat storage tank,
A heat storage medium such as boulders filled in the heat storage tank, and a reserve heat storage tank having a larger diameter than the geothermal extraction tank buried in the ground so that the upper end is located on the ground or near the ground, A backup communication pipe that opens at a predetermined pressure or more and that connects the lower end of the preliminary heat storage tank and the communication pipe, and the storage connection that connects the upper end of the preliminary heat storage tank and the upper end of the heat storage tank. A geothermal heat extraction device comprising: a connection pipe capable of preventing backflow from a heat tank.