JP4936726B2 - Geothermal air conditioning system - Google Patents

Description

The present invention relates to a geothermal heating and cooling BoSo location which can utilize geothermal to room cooling and heating.

The thing of patent document 1 is known as an example of the air-conditioning system using geothermal. In this technology, a water / water heat exchanger installed on the ground and a first internal passage formed by an internal space of a first pipe buried vertically in the ground in a water circulation path in which a water feed pump is interposed The air that has undergone heat exchange with the water in the water passage while passing through the air passage of the air-to-water heat exchanger is used for air conditioning of the building.
Japanese Patent No. 3340331

  By the way, in the technique of the said patent document 1, although the air heat-exchanged through geothermal and water is utilized for the air conditioning of a building, this is constant at about 15 degreeC all over a year. The technology of storing the heat of the outside air in the ground and effectively using it for air conditioning is not disclosed.

The present invention has been made in view of the above circumstances, and heat storage outside air heat in the ground, has an object to provide a geothermal heating and cooling BoSo location that can be effectively used for heating and cooling.

In order to solve the above-mentioned problem, the invention according to claim 1 is a geothermal heating and cooling device ,
A first underground heat storage unit 1 embedded in the ground, a second underground heat storage unit 2 embedded in the ground apart from the first underground heat storage unit 1, and an outdoor air A heat collecting part 3 for collecting heat; and a heat releasing part 4 provided in the room,
In the warm season, a heat medium is circulated between the first underground heat storage unit 1 and the heat collection unit 3, and a heat medium is transferred between the second underground heat storage unit 2 and the heat release unit 4. And circulating a heat medium between the first underground heat storage unit 1 and the heat release unit 4 and between the second underground heat storage unit 2 and the heat collection unit 3 in the cold season. And a circulation means 5 for circulating the heat medium .

Here, the warm season means a period from summer to autumn, and the cold season means a period from winter to spring.
The heat of the outside air includes, for example, the heat of the outside air itself as well as exhaust heat from solar heat, fuel cells, and the like.
Such a geothermal air-conditioning method can be performed using a geothermal air-conditioning apparatus as shown in FIG. This geothermal air-conditioning / heating device includes a first underground heat storage unit 1 and a second underground heat storage unit 2.
Since the geothermal heat is constant at around 15 ° C throughout the year, the low temperature heat stored in the second underground heat storage section 2 does not rise above around 15 ° C. 2 By storing heat (cold heat) of the outside air at a low temperature continuously in the underground heat storage unit 2, cold energy is stored in the second underground heat storage unit at a temperature considerably lower than 15 ° C. even in the warm season.
Moreover, the heat of the high temperature of the warm season stored in the 1st underground heat storage part 1 does not fall from around 15 degreeC, but rather the heat of the high temperature outside air is given to the 1st underground heat storage part 1 in the warm season. By continuously storing heat, warm heat is stored in the first underground heat storage section at a temperature considerably higher than 15 ° C. even in the cold season.

According to the first aspect of the present invention, in the warm period, the heat medium is circulated between the first underground heat storage unit 1 and the heat collection unit 3 to thereby collect the heat in the heat collection unit 3. The heat of the outside air (hot heat) having a high temperature is continuously stored in the first underground heat storage unit 1, and heat is generated between the second underground heat storage unit 2 and the heat collection unit 3 in the cold season. By circulating the medium, the heat (cold heat) of the outside air having a low cold temperature collected by the heat collecting unit is continuously stored in the second underground heat storing unit 2.
And in the warm season, by circulating the heat medium between the second underground heat storage unit 2 and the heat release unit 4, the heat (cold heat) stored in the second underground heat storage unit 2 and the indoor air Exchange heat with Since the second underground heat storage unit 2 stores and holds the heat (cold heat) of the low-temperature outside air in the cold season, heat is released between the low-temperature outside air (cold heat) and the indoor air. By performing heat exchange via the unit 4, the temperature in the room can be lowered, that is, the air can be cooled.
Further, in the cold season, by circulating a heat medium between the first underground heat storage unit 1 and the heat release unit 4, heat (heat) stored in the first underground heat storage unit 1 and indoor air Exchange heat with The first underground heat storage unit 1 stores and holds the heat (hot heat) of the outdoor air having a high temperature during the warm season, so heat is released between the heat (heat) of the high temperature outdoor air and the indoor air. By exchanging heat through the section 4, the indoor temperature can be raised, that is, heating can be performed.

Invention of Claim 2 is the geothermal utilization air-conditioning apparatus of Claim 1 ,
The circulation means 5 connects the first underground heat storage unit 1 and the heat collection unit 3 so that a heat medium can be circulated, and the second underground heat storage unit 2 and the heat release unit 4. A first circulation path 11 (see FIG. 2) for connecting the heat medium in a circulating manner;
The first underground heat storage unit 1 and the heat release unit 4 are connected so that the heat medium can be circulated, and the heat medium can be circulated between the second underground heat storage unit 2 and the heat collection unit 3. A second circulation path 12 to be connected (see FIG. 3),
The first circulation path 11 and the second circulation path 12 can be switched.

According to the second aspect of the present invention, in the warm season, the first circulation path 11 is selected to connect the first underground heat storage unit 1 and the heat collection unit 3 so that the heat medium can circulate. At the same time, the second underground heat storage section 2 and the heat release section 4 are connected so that the heat medium can circulate, so that the heat of the warm air collected by the heat collection section 3 is continuously increased. While storing heat in the 1 underground heat storage part 1, heat exchange is carried out via the heat release part 4 between the heat of the low temperature outside air stored in the 2nd underground heat storage part 2 and indoor air. By doing so, the temperature in the room can be lowered, that is, it can be cooled.
In the cold season, by selecting the second circulation path 12, the first underground heat storage unit 1 and the heat release unit 4 are connected so that the heat medium can circulate, and the second underground heat storage unit 2. And the heat collecting part 3 are connected so that the heat medium can be circulated, and the heat of the outside air having a low cold temperature collected by the heat collecting part 3 is continuously stored in the second underground heat accumulating part 2 In addition, the temperature of the room is raised by performing heat exchange between the heat of the high temperature outside air stored in the first underground heat storage unit 1 and the indoor air via the heat release unit 4. Can be heated.
In this way, by switching between the first circulation path 11 and the second circulation path 12 according to the warm period and the cold period, it is possible to easily and reliably select and perform the cooling and heating.

The invention according to claim 3 is the geothermal air-conditioning apparatus according to claim 1 or 2 ,
The heat releasing part 4 is a radiant panel, and the heat collecting part 3 is a heat collecting panel.

According to the third aspect of the present invention, cold heat can be released from the radiation panel 4 during the warm season, and warm heat can be released during the cold season. Further, the heat collection panel 3 can effectively collect the heat of the outside air.

  According to the present invention, in the warm season, cooling can be performed by performing heat exchange between the low-temperature heat stored in the second underground heat storage section in the ground and the indoor air. In, it can heat by exchanging heat between the high-temperature heat stored in the first underground heat storage section in the ground and indoor air. Therefore, the heat of the outside air can be stored in the ground and used effectively for air conditioning.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows a schematic configuration of a geothermal air-conditioning apparatus according to the present invention. The geothermal utilization cooling / heating apparatus shown in this figure includes a first underground heat storage unit 1 buried in the ground and a second underground heat storage unit 2 buried in the ground apart from the first underground heat storage unit 1. A heat collecting unit 3 installed outside the room, a heat releasing unit 4 installed inside the room, and a circulation means 5.

  The 1st underground heat storage part 1 is comprised by a part of ground (it shows with the dashed-two dotted line in FIG. 1) in which buildings, such as a house, were constructed | assembled. The first underground heat storage unit 1 has a length of about 10 m in the vertical direction, and the depth is a depth at which the geothermal temperature becomes a constant temperature of about 15 ° C. throughout the year, for example, about 5 to 10 m. It has become. In the first underground heat storage section 1, a heat exchange pipe 6 constituting the circulation means 5 is embedded. This heat exchanging pipe 6 is a thin pipe formed of a material excellent in thermal conductivity, corrosion resistance, rust prevention, etc., for example, stainless steel. Although not shown, this thin pipe is the first underground heat storage. In the part 1, it is arranged meandering up and down many times. Therefore, when water as a heat medium passes through the heat exchange pipe 6, when there is a temperature difference between the water and the geothermal heat, the heat having the higher temperature passes through the heat exchange pipe 6. It has come to be transmitted to. Since geothermal heat is constant at around 15 ° C. throughout the year, when water having a temperature higher than around 15 ° C. passes through the heat exchange pipe 6, the heat of the high temperature water is transmitted to the first underground heat storage unit 1. Thus, this heat is stored. In addition, warm heat means the heat of temperature higher than geothermal heat.

The 2nd underground heat storage part 2 is comprised similarly to the 1st underground heat storage part 1, and is embedded at a distance of about 5 meters from the first underground heat storage part 2. Similarly to the first underground heat storage unit 1, the second underground heat storage unit 2 has a length of about 10 m above and below, and its depth is a constant temperature of about 15 ° C. throughout the year. The depth becomes, for example, about 5 to 10 m. In the second underground heat storage unit 2, a heat exchange pipe 7 constituting the circulation means 5 is embedded. The heat exchange pipe 7 has the same configuration as the heat exchange pipe 6.
Therefore, when water as a heat medium passes through the heat exchange pipe 7, when there is a temperature difference between the water and the geothermal heat, the heat having the higher temperature passes through the heat exchange pipe 7. It has come to be transmitted to. Since the geothermal heat is constant at around 15 ° C throughout the year, when water having a temperature lower than around 15 ° C passes through the heat exchange pipe 7, the cold heat of the low temperature water is transmitted to the second underground heat storage section 2. This cold energy is stored. In addition, cold heat means the heat | fever of temperature lower than geothermal heat.

The heat collecting unit 3 includes a heat collecting panel 3. The heat collecting panel 3 can store heat in the water by collecting heat from the sunlight and the outside air and exchanging heat collected by the heat collecting plate with water as a heat medium. Possible thin plate-like panel, for example, installed on the roof of a building. The installation location of the heat collecting panel 3 may be other than the roof, and may be installed directly on the wall or the ground as long as it is a sunny place.
The heat collection panel 3 is connected to a feed pipe 8 that feeds water as a heat medium into the heat collection panel 3 and a feed pipe 9 that feeds water from the heat collection panel 3.

  The heat release part 4 is a radiation panel 4 in the present embodiment, and is installed in a room of a building. The radiant panel 4 is formed by meandering long and narrow pipes through which water as a heat medium flows, and can radiate radiant heat from the surface. Such a radiation panel 4 is installed, for example, on an indoor wall or ceiling.

As shown in FIG. 2, the circulation means 5 circulates water as a heat medium between the first underground heat storage unit 1 and the heat collection unit 3 in the warm season, and the second underground heat storage unit. As shown in FIG. 3, in the cold season, water as a heat medium is circulated between the first underground heat storage unit 1 and the heat discharge unit 4 as shown in FIG. While circulating water, the water as a heat medium is circulated between the 2nd underground heat storage part 2 and the heat collecting part 3, and it is comprised as follows.
That is, first, as shown in FIG. 2, the circulation means 5 connects the first underground heat storage unit 1 and the heat collection unit 3 so that water as a heat medium can be circulated, and the second underground heat storage unit 2. The heat circulation part 4 is connected to the first circulation path 11 so that water as a heat medium can circulate, and as shown in FIG. 3, the first underground heat storage part 1 and the heat release part 4 are connected to the heat medium. And a second circulation path 12 that connects the second underground heat storage unit 2 and the heat collection unit 3 so that water as a heat medium can be circulated. The circulation path 11 and the second circulation path 12 can be switched by switching valves 13 and 14.

The first circulation path 11 includes a first inter-heat storage heat collection section circulation path 11a that connects the first underground heat storage section 1 and the heat collection section 3 so that water as a heat medium can be circulated, and a second underground heat storage section. It is comprised from the circulation path 11b between the 2nd heat storage heat discharge | release parts which connects the part 2 and the heat discharge | release part 4 so that the water as a heat medium can circulate.
The circulation path 11a between the first heat storage and heat collection parts is a delivery pipe 15 connected to the switching valve 13 from the first underground heat storage part 1 via the pump P1 for water supply, and a switching valve 13 to the delivery pipe 15. The feed pipe 8 connected via the pipe, the feed pipe 9, and the return pipe 16 connected to the feed pipe 9 and returning water as a heat medium to the first underground heat storage unit 1. Yes.
The circulation path 11b between the second heat storage and heat release sections is a delivery pipe 17 connected to the switching valve 14 from the second underground heat storage section 2 via the water feed pump P2, and the switching valve 14 is connected to the delivery pipe 17. And a return pipe 19 that is connected to the heat release part 4 and returns water as a heat medium to the second underground heat storage part 2.

The second circulation path 12 includes a first inter-heat storage heat release section circulation path 12a that connects the first underground heat storage section 1 and the heat release section 4 so that water as a heat medium can circulate, and a second underground heat storage section. It is comprised from the circulation path 12b between the 2nd heat storage heat collecting parts which connects the part 2 and the heat collecting part 3 so that the water as a heat medium can circulate.
The circulation path 12a between the first heat storage and heat release parts is a delivery pipe 15 connected to the switching valve 13 from the first underground heat storage part 1 via the pump P1 for water supply, and the switching valve 13 is connected to the delivery pipe 15. And a feed pipe 20 that feeds water as a heat medium to the heat release part 4 and is connected to the heat release part 4 and returns water as a heat medium to the first underground heat storage part 1 It is comprised from the piping 21. FIG. The return pipe 21 partially overlaps the return pipe 16.
The circulation path 12b between the second heat storage and heat collection parts is a delivery pipe 17 connected to the switching valve 14 from the second underground heat storage part 2 via the water feed pump P2, and the switching valve 14 to the delivery pipe 17 And a return pipe 24 connected to the heat collecting part 3 and returning water as a heat medium to the second underground heat storage part 2. The feed pipe 23 partially overlaps the feed pipe 8. The return pipe 24 partially overlaps the return pipe 19.

Next, a method for cooling and heating by the geothermal air conditioning apparatus having the above configuration will be described with reference to FIGS.
FIG. 2 shows a state of the geothermal air-conditioning apparatus in the warm season. First, by operating the switching valves 13 and 14 and selecting the first circulation paths 11a and 11b, the first underground heat storage unit 1 and the heat collection unit 3 are connected so that water as a heat medium can circulate. At the same time, the second underground heat storage unit 2 and the heat release unit 4 are connected so that water as a heat medium can be circulated.
And if the pump P1 is actuated, water will circulate between the 1st underground heat storage part 1 and the heat collecting part 3. FIG. In the heat collecting part 3, heat from sunlight or heat from outside air is collected particularly during the daytime, and this heat is transmitted to the water, and this water passes through the delivery pipe 9 and the return pipe 16 to the first underground heat storage part 1. The heat of water is stored in the first underground heat storage unit 1 by flowing into the first underground heat storage unit 1. That is, heat exchange is performed between the water and the ground of the first underground heat storage unit 1 via the heat exchange pipe 6, and heat is stored in the first underground heat storage unit 1. Then, the water is again sent to the heat collecting section 3 through the delivery pipe 15, the switching valve 13, and the delivery pipe 8. Due to the circulation of water as such a heat medium, the heat of the high temperature outside air is continuously stored and held in the first underground heat storage unit 1.

  On the other hand, when the pump P <b> 2 is operated, water as a heat medium circulates between the second underground heat storage unit 2 and the heat release unit 4. That is, water flows from the second underground heat storage unit 2 into the heat release unit 4 through the delivery pipe 17, the switching valve 14, and the delivery pipe 18. As will be described later, since the heat of the low-temperature outside air is stored and held in the second underground heat storage section 2, the heat of the low-temperature outside air is transmitted to the heat release section 4 by water, By performing heat exchange between the water and indoor air via the heat release part 4, the indoor temperature can be lowered, that is, the air can be cooled. Water from the heat release unit 4 is sent again to the second underground heat storage unit 2 through the return pipe 19. The heat of the low-temperature outdoor air stored in the second underground heat storage unit 2 by the circulation of water as such a heat medium is continuously dissipated as cold from the heat release unit 4 to continuously Therefore, the room can be cooled.

FIG. 3 shows the state of the geothermal air-conditioning apparatus in the cold season. First, by operating the switching valves 13 and 14 and selecting the second circulation paths 12a and 12b, the first underground heat storage unit 1 and the heat release unit 4 are connected so that water as a heat medium can circulate. At the same time, the second underground heat storage section 2 and the heat collection section 3 are connected so that water as a heat medium can be circulated.
And if the pump P2 is actuated, water will circulate between the 2nd underground heat storage part 2 and the heat collecting part 3. FIG. In the heat collecting section 3, the heat (cold heat) of the low temperature outside air is collected by the heat radiation cooling especially at night, and this cold heat is transmitted to the water, and this water passes through the delivery pipe 9 and the return pipe 24 to the second ground. By flowing into the middle heat storage unit 2, cold water is stored in the second underground heat storage unit 2. That is, heat exchange is performed between the water and the ground of the second underground heat storage unit 2 through the heat exchange pipe 7, and cold heat is stored in the second underground heat storage unit 2. Then, the water is again sent to the heat collecting section 3 through the delivery pipe 17, the switching valve 14, and the delivery pipe 23. Due to the circulation of water as such a heat medium, the cold of the outside air having a low temperature is continuously stored and held in the second underground heat storage unit 2.

  On the other hand, when the pump P1 is operated, water as a heat medium circulates between the first underground heat storage unit 1 and the heat release unit 4. That is, water flows from the first underground heat storage unit 1 into the heat release unit 4 through the delivery pipe 15, the switching valve 13, and the delivery pipe 20. As described above, since the heat of the high-temperature outside air is stored and held in the first underground heat storage unit 1, the heat of the high-temperature outside air is transmitted to the heat release unit 4 by water, By performing heat exchange between the water and indoor air via the heat release part 4, the indoor temperature can be raised, that is, the room can be heated. Water from the heat release unit 4 is sent again to the first underground heat storage unit 1 through the return pipe 21. The heat of the high-temperature outdoor air stored in the first underground heat storage unit 1 by the circulation of water as such a heat medium is continuously dissipated as heat from the heat release unit 4 to continuously The room can be heated.

  In this way, by switching between the first circulation path 11 and the second circulation path 12 according to the warm period and the cold period, it is possible to easily and reliably select and perform the cooling and heating.

An example of the geothermal utilization air conditioning apparatus which concerns on this invention is shown, and it is the schematic block diagram. It is a schematic block diagram which shows the state in a warm season equally. It is a schematic block diagram which shows the state in a cold season.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st underground heat storage part 2 2nd underground heat storage part 3 Heat collecting part 4 Radiation panel (heat release part)
5 Circulating means 11 First circulation path 12 Second circulation path 13, 14 Switching valve

Claims (3)

A first underground heat storage section buried in the ground, a second underground heat storage section buried in the ground apart from the first underground heat storage section, and installed outdoors to collect the heat of the outside air A heat collecting part for heating and a heat releasing part provided in the room;
In the warm period, circulating the heat medium between the first underground heat storage unit and the heat collection unit, and circulating the heat medium between the second underground heat storage unit and the heat release unit, Circulation means for circulating the heat medium between the first underground heat storage unit and the heat collection unit and for circulating the heat medium between the second underground heat storage unit and the heat collection unit in the cold season A geothermal air-conditioning / heating device characterized by comprising In the geothermal utilization air conditioning apparatus of Claim 1 ,
The circulation means connects the first underground heat storage section and the heat collection section so that a heat medium can be circulated, and the heat medium can circulate between the second underground heat storage section and the heat release section. A first circulation path connected to
The second underground heat storage section and the heat release section are connected so that a heat medium can be circulated, and the second underground heat storage section and the heat collection section are connected so that the heat medium can be circulated. A circulation path,
The geothermal heat-use air conditioner characterized in that the first circulation path and the second circulation path can be switched. In the geothermal utilization air conditioning apparatus of Claim 1 or 2 ,
The said heat-dissipation part is a radiation panel, The said heat collection part is a heat collection panel, The geothermal utilization cooling / heating apparatus characterized by the above-mentioned.

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