JP2000009352A - Ground heat extractor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively perform cooling and the like using ground heat by connecting an air compressor and a cool-air compression-storage tank to the upstream-side and downstream-side ends of a plurality of ground-heat-extractor pipes, respectively, and blowing cool air in the tank into the room and the like. SOLUTION: A plurality of ground-heat-extractor pipes 1 are buried in the ground 2, connected to one another in series by way of communicating pipes, and filled with a heat medium 4. A cool-air compression storage tank 11 is also buried in the ground 2, and an exhaust pipe 12 connected to the down- stream-side end of the ground-heat-extractor pipes 1 is connected to the tank 11. Ground heat around the ground-heat-extractor pipes 1 is stored in the heat medium 4, and air from the air compressor 9 is stored in an air heat storage tank 25 to be cooled therein, and then introduced through a plurality of ground- heat-extractor pipes 1 and the exhaust pipe 12 to the cool-air-compression storage tank 11 to be stored therein. The stored cool air is blown into the rooms of buildings 14... from air blowers 15... through a cool-air-supply pipe 13 to perform cooling.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a geothermal extraction apparatus which can be used mainly for cooling in summer or the like by using geothermal energy.

[0002]

2. Description of the Related Art Conventionally, a geothermal extraction device that uses geothermal heat for cooling and heating uses a structure for pumping groundwater.

[0003]

The conventional geothermal extraction apparatus has a drawback that it sinks ground and cannot collect geothermal efficiently because it draws groundwater.

The present invention has been made in view of the above-mentioned conventional drawbacks,
Collecting geothermal energy efficiently without pumping groundwater,
It is an object of the present invention to provide a geothermal extraction device that can be put to practical use mainly as heat for cooling.

The above and other objects and novel features of the present invention will become more completely apparent when the following description is read in conjunction with the accompanying drawings. However, the drawings are for explanation only, and do not limit the technical scope of the present invention.

[0006]

In order to achieve the above object, the present invention has a heat medium such as granite or sesame in a buried inside so as to communicate with the ground at a depth at which geothermal can be extracted. A plurality of geothermal extraction pipes, an air compressor connected to an air supply pipe connected to an upstream end of the plurality of geothermal extraction pipes via an air storage tank, and the plurality of geothermal extraction pipes A cold air compression storage tank buried underground connected to an air discharge pipe connected to the downstream end of the pipe, and cold air supply for delivering the cool air in the cold air compression storage tank to an air blower such as a room A geothermal extraction device is constituted by the pipe.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings.

In the first embodiment of the present invention shown in FIGS. 1 to 5, reference numeral 1 denotes a plurality of buried underground 2 at a depth from which geothermal heat can be extracted, and nine in the embodiment of the present invention. For example, a geothermal extraction pipe made of stainless steel or the like having a diameter of 200 millimeters and a length of 5500 millimeters. It is connected in series in a state, and the inside thereof is filled with a heat medium 4 of large to medium crushed crushed stone, such as granite and sesame stone, which is hard and confidential.

Reference numeral 5 denotes a manhole whose opening 7 can be opened and closed by a manhole cover 6 formed in the underground 2 on the upstream side of the nine geothermal extraction pipes 1.
An air compressor 9 for supplying air to an air supply pipe 8 provided with an air storage tank 25 connected to the upstream end of the geothermal extraction pipe 1 is provided, and a ventilation tube 10 is provided in the manhole 5. Is installed.

Reference numeral 11 denotes a large-capacity compressed air storage tank buried in the underground 2 on the downstream side of the nine geothermal extraction pipes 1. A discharge pipe 12 connected to a downstream end of the pipe 1 is connected.

Reference numeral 13 denotes a cool air supply pipe for guiding the cool air in the cool air compression storage tank 11 to air blowers 15, 15, 15 attached to the interiors of the buildings 14, 14, 14, and the like. Vessels 15, 15,
On-off valves 16, 16, 16 are provided in the branch pipes 15a, 15a, 15a closer to 15 respectively.

Reference numeral 17 denotes driving the air compressor 9 when the pressure in the cold air compression storage tank 11 becomes lower than a preset value, and stopping driving the air compressor 9 when the pressure becomes higher. It is an automatic pressure switch.

Reference numeral 18 denotes a pressure gauge for indicating the pressure in the cold air compression storage tank 11. The pressure in the cold air compression storage tank 11 is set to a predetermined numerical value on a pressure introducing pipe 19 to which the pressure gauge 18 is attached. A safety valve 20 is provided for discharging to the outside when it becomes higher.

In the geothermal extraction device 21 having the above-described configuration, the ground heat of about 15 ° C. in the ground around the nine geothermal extraction pipes 1 is stored in the internal heat medium 4 via the geothermal extraction pipes 1. In this state, the air from the air compressor 9 is accumulated in the air accumulation tank 25 and cooled, and passes through the nine geothermal extraction pipes 1 and the discharge pipe 1
2 and stored in a compressed state in the cold air compression storage tank 11. The cool air stored in the cool air compression storage tank 11 is supplied from the cool air supply pipe 13 to the air blower 15,
The air is supplied to the interior of the buildings 14, 14, 14 through 15, 15.

[0015]

Next, different embodiments of the present invention shown in FIGS. 6 to 11 will be described. In addition,
In the description of the different embodiments of the present invention, the same components as those of the first embodiment of the present invention are denoted by the same reference numerals, and duplicate description will be omitted.

In the second embodiment of the present invention shown in FIGS. 6 to 8, the main difference from the first embodiment of the present invention is that the upper end portion is located in the cold air compressed storage tank 11. , A lower end portion of which is buried in the underground 2 of the cold air compression storage tank 11 and has a cylindrical case body 22 having a large number of winding-type through-holes, such as granite or sesame stone filled in the case body 22. A heat storage body 24 composed of a heat medium 23 composed of a hard and confidential large-medium crushed stone, and a discharge pipe 12 formed of a cold air compression storage tank 11
The geothermal extraction device 21 </ b> A thus configured is configured such that the cold air supplied by the heat storage body 24 is kept in the cold air compression storage tank 11 as it is opened in the inside and the lower case body 22 of the heat medium 24. Can be kept efficiently.

The third embodiment of the present invention shown in FIGS. 9 to 11 is different from the second embodiment of the present invention mainly in that a heat storage body projecting downward from a cold air compression storage tank 11 is provided. By using the case body 22A thus formed in that the case body 22A of 24A is sealed, it is possible to reliably prevent groundwater from flowing into the cold air compression storage tank 11 and to increase the level of groundwater. It can be easily installed even in a place.

[0018]

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

(1) A plurality of geothermal extraction pipes having a heat medium, such as granite or sesame stone, embedded therein so as to sequentially communicate with the ground at a depth at which geothermal can be extracted, and the plurality of geothermal extraction pipes An air compressor connected to an air supply pipe connected to an upstream end of the pipe with an air storage tank interposed therebetween, and an air discharge pipe connected to downstream ends of the plurality of geothermal extraction pipes A cold air compression storage tank buried underground and a cold air supply pipe that delivers cold air in the cold air compression storage tank to an air blower such as a room. Geothermal heat can be stored in the heat medium stored in the pipe. Therefore, the air from the air compressor is stored as cold air in the cold air compression storage tank by the heat stored in the air storage tank or heat medium,
It can be supplied to the interior of a building or the like by a cool air supply pipe.

(2) According to the above (1), the air which has passed through the plurality of geothermal extraction pipes and has become cold air is stored in the cold air compression storage tank, so that the air always passes through the plurality of geothermal extraction pipes. The air can be intermittently passed through without performing. Therefore, it is possible to efficiently store the geothermal heat in the portion where the plurality of geothermal extraction pipes are embedded in the heat medium.

(3) According to the above (1), it is only necessary to drive the air compressor, so that the maintenance cost is low and it can be used economically.

(4) According to the second aspect, the same effects as in the above (1) to (3) can be obtained, and the cool air in the cold air compression storage tank can be efficiently maintained by the heat storage body.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view of a first embodiment of the present invention.

FIG. 2 is a plan view of the first embodiment of the present invention.

FIG. 3 is a plan view of a plurality of geothermal extraction pipes.

FIG. 4 is a left side view of FIG. 3;

FIG. 5 is a right side view of FIG. 3;

FIG. 6 is a partially cutaway side view of the second embodiment of the present invention.

FIG. 7 is a sectional view of a cold air compressed storage tank.

FIG. 8 is a partially cutaway plan view of the cold air compressed storage tank.

FIG. 9 is a partially cutaway side view of the third embodiment of the present invention.

FIG. 10 is a sectional view of a cold air compressed storage tank.

FIG. 11 is a partially cutaway plan view of the cold air compressed storage tank.

[Explanation of symbols]

1: Geothermal extraction pipe, 2: Underground, 3: Communication pipe,
4: Heat medium, 5: Manhole, 6: Manhole cover, 7: Opening, 8: Air supply pipe, 9: Air compressor, 10: Ventilation cylinder,
11: cold air compressed storage tank, 12: exhaust pipe, 13: cold air supply pipe, 14: building,
15: air blower, 16: open / close valve,
17: automatic pressure switch, 18: pressure gauge,
19: pressure introduction pipe, 20: safety valve, 2
1, 21A: geothermal extraction device, 22: case body,
23: heat medium, 24: heat storage body, 25: air storage tank.

Claims (2)

[Claims] 1. A plurality of geothermal extraction pipes having a heat medium, such as granite or sesame stone, embedded therein so as to communicate with the ground at a depth at which geothermal can be extracted, and the plurality of geothermal extraction pipes An air compressor connected to the air supply pipe connected to the upstream end of the air storage tank and an air discharge pipe connected to the downstream ends of the plurality of geothermal extraction pipes. A geothermal extraction apparatus comprising: a cold air compression storage tank buried underground connected to the ground; and a cold air supply pipe for delivering cold air in the cold air compression storage tank to an air blower in a room or the like. 2. A plurality of geothermal extraction pipes having a heat medium, such as granite or sesame stone, embedded therein so as to communicate with the ground at a depth at which geothermal can be extracted, and the plurality of geothermal extraction pipes. An air compressor connected to an air supply pipe connected to an upstream end of the cold air compression storage tank buried in the ground downstream of the plurality of geothermal extraction pipes; and A heat storage body in which a heat medium such as granite or sesame is stored inside a case body buried in the ground below the cold air compression storage tank, and One end is connected to the downstream end of the pipe, the other end is an air discharge pipe opened to the cold air compression storage tank and the heat storage body, and the cool air in the cold air compression storage tank to an air blower such as a room. Arrangement A geothermal extraction device comprising: a cold air supply pipe for sending.