JP6087497B2 - Ground heat utilization system using garage - Google Patents

Description

  The present invention relates to a geothermal heat utilization system for securing a sufficient space around a building even in a narrow site building.

  Conventionally, an underground heat exchange device for using underground heat is known (see Patent Document 1).

  This underground heat exchange device is embedded in the underground part of the parking lot site, thereby making the upper ground surface of the geothermal exchange device substantially flat and easily maintaining a work space for maintenance by moving the vehicle. It is what I did.

Japanese Patent No. 4318516

  However, considering the location conditions of buildings such as around urban areas, for example, as in Patent Document 1, it is not always possible to secure a space around the building to the extent that a parking lot can be installed.

  Therefore, for example, when the parking lot is not around because the site is small, it is necessary to secure a space for installing the underground heat exchange device around the building, and the space around the building is unnecessarily occupied. It also leads to things.

  Accordingly, an object of the present invention is to provide a geothermal heat utilization system in which a site of a building is not unnecessarily occupied.

  In order to achieve the above-mentioned object, the underground heat utilization system according to the present invention is provided in the ground below the floor surface of the interstitial part of the garage of the building in order to allow the heat carrier fluid to pass and exchange heat with the ground. An underground passage, an inlet provided in the garage for allowing the heat carrier fluid to flow into the underground passage, and an outlet provided to blow the heat carrier fluid that has passed through the underground passage A geothermal heat utilization device having the above is provided.

  And a heat pump system including an indoor unit installed in a room of the building, an outdoor unit installed in or around the garage, and a refrigerant that circulates between the indoor unit and the outdoor unit. The outflow port may be provided so that the heat carrier fluid blown out from the outlet exchanges heat with the refrigerant passing through the heat exchange unit of the outdoor unit.

  Moreover, the outdoor unit and the outflow port of the heat pump may be provided inside the garage.

  Furthermore, the underground route may be provided so as to mainly pass through the soil part of the garage or the ground part directly below the soil part.

  Moreover, you may provide the opening part for the maintenance of the said underground heat utilization apparatus in the dirt part of the said garage.

  According to the geothermal heat utilization system according to the present invention configured as described above, since the geothermal heat utilization device for exchanging heat with the geothermal heat is provided in the garage of the building, the geothermal heat utilization device is provided around the building. It is not necessary to secure a space for installing the outdoor unit of the air conditioner or the air conditioner, and the site can be used effectively.

It is explanatory drawing which showed typically the building which provided the underground heat utilization system of embodiment which concerns on this invention. It is the perspective view which expanded and displayed the garage of the building of FIG. It is the perspective view which expanded and displayed the heat collecting pipe provided in the dirt part of the garage of FIG. It is the perspective view which showed the outdoor unit provided in the garage of FIG. 1, and showed typically the connection part of the external air intake port and the outflow port of an underground path | route. It is the figure which showed typically the underground heat utilization system of the Example which concerns on this invention.

  Hereinafter, an underground heat utilization system according to an embodiment of the present invention will be described with reference to FIGS.

The ground heat utilization system is for using the ground heat by exchanging heat with the air conditioner 3 as the heat pump provided in the building 1 having the garage 2 and the heat of the air conditioner 3 after exchanging heat with the ground. And a geothermal heat utilization device 6.
<Building>
The building 1 is constructed on a foundation formed by a bottom slab 1b made of reinforced concrete and a side wall 1a erected on the outer edge thereof. Furthermore, as shown in FIG. 1, a garage 2 is formed by a part of the bottom slab 1 b (the garage dirt) and the wall of the building 1 (see FIGS. 1 and 2).

  A garage shutter 2a is provided at the entrance / exit of the garage 2, and when the garage shutter 2a is closed, the inside and outside of the garage 2 are hardly ventilated.

Moreover, the interstitial part 2b of the garage 2 is formed using concrete, various aggregates, etc., and the interstitial part 2b can use what has higher thermal conductivity than the ground part G.
<Ground heat utilization device>
The geothermal heat utilization device 6 is provided in the garage 2 of the building 1, and an underground path 6 a formed in the dirt section 2 b of the garage 2, and an inflow portion for allowing the air in the garage 2 to flow into the underground path 6 a 8 and an outflow portion 9 through which the air that has passed through the underground path 6a and exchanged heat with the underground heat flows out toward the outdoor unit 7 in the garage 2.

Here, the air in the garage 2 passes through the underground path 6a and exchanges heat with the inside of the soil-to-earth part 2b, so that it functions as a heat transfer fluid.
<Underground route>
As shown in FIG. 2, the underground path 6 a includes a substantially annular ring pipe 10 embedded in the dirt portion 2 b of the garage 2, a plurality of connection members 11 provided in the ring pipe 10, and a connection member 11. It has a plurality of U-shaped heat collecting tubes 12 and the like that branch and extend downward. In FIG. 1, the illustration of the connection member 11 is omitted for the convenience of understanding.

  Openings 6b and 6c at both ends of the annular tube 10 are connected to an upright pipe 18 of an inflow portion 8 and an upright tube 21 of an outflow portion 9, which will be described later.

  The annular tube 10 and the heat collecting tube 12 are heat exchangeable inside and outside the tube itself, and are constructed of a tube material such as a steel tube or a vinyl chloride tube. Among these, the heat collecting pipe 12 is covered with a heat exchanging buried pipe as shown in FIG. 3, and can exchange heat with the inside of the dirt portion 2 b of the garage 2 through the heat exchanging buried pipe. .

  In addition, as shown in FIG. 2, an opening 13 for installing the annular tube 10, the heat collecting tube 12, and the like and for maintaining these members is formed in the dirt section 2 b of the garage 2.

  An insertion / removal hole 15 for the heat collection tube 12 is formed at a predetermined interval in the bottom portion 14 of the opening 13 of the dirt portion 2b (see FIG. 1), and the heat collection tube 12 can be inserted and removed. With the heat collecting pipe 12 installed, the air in the garage 2 passing through the inside of the heat collecting pipe 12 is heat-exchanged with the inside of the soil portion 2b of the garage 2 in the ground.

  An annular tube 10 is provided so as to circulate the upper part of each heat collecting tube 12 exposed in the opening 13, and the annular tube 10 and the heat collecting tube 12 are connected in communication by the connecting member 11. The annular tube 10 and the heat collecting tube 12 are detachable from each other and can be disassembled for maintenance.

  In addition, the code | symbol H1 shown in FIG. 3 in the state which installed the heat collection pipe | tube 12 shows the height position exposed in the opening 13 of a garage, and the code | symbol H2 is the height embed | buried under the soil part 2b. Indicates the position. And the code | symbol H3 is a position equivalent to the ground part G1 below the dirt part 2b.

  Moreover, as shown in FIG. 1, the opening 16 of the dirt part 2b is provided with a lid 16 that can be opened and closed so as to be able to withstand the weight of the vehicle M, and the lid 16 is formed in a closed state. A heat insulating material or the like is arbitrarily spread so as to fill a space in the opening 13 of the garage 2.

An opening 17 for maintenance of the underground heat utilization device 6 is formed by the opening 13 and the lid body 16 of the dirt portion 2b.
<Inflow section>
As shown in FIGS. 1 and 2, the inflow portion 8 of the underground heat utilization device 6 includes an upright pipe 18 erected from the floor surface of the dirt section 2 b of the garage 2, and an inflow port provided at the tip of the upright pipe 18. 18a, a suction fan 19 provided at the inlet 18a, a dustproof filter (not shown) provided at the inlet 18a upstream of the suction fan 19, and the like.

  The inflow port 18 a is provided at a substantially central position at a height position in the garage 2. The upstream side and the downstream side of the suction fan 19 are in communication with each other while the rotation of the suction fan 19 is stopped.

  The suction fan 19 is electrically connected to a remote controller 4a for operating the indoor unit 4 provided in the room 5 (not shown), and can be controlled in conjunction with the air conditioner 3 as will be described later. .

The dustproof filter is provided to prevent dust and dirt in the garage 2 from entering the upright pipe 18 at the time of suction (not shown).
<Outflow part>
As shown in FIGS. 2 and 4, the outflow portion 9 of the underground heat utilization device 6 is connected to the opening end 6 c on the downstream side of the annular tube 10 and is erected from the floor surface of the garage 2. A cover portion 22 and the like for guiding the air flowing out from the outlet 21a at the opening end on the downstream side of the standing pipe 21 to the outside air inlet 7a of the outdoor unit 7 in the garage 2 are provided.

  The cover portion 22 covers the space between the outlet 21 a of the upright pipe 21 and the outside air inlet 7 a of the outdoor unit 7. As shown in FIGS. 2 and 4, one end of the cover portion 22 is formed in a cross-sectional shape having substantially the same size as the outlet 21 a of the upright pipe 21, and gradually spreads from there. The other end is formed in a cross-sectional shape that is substantially the same size as the outside air inlet 7 a of the outdoor unit 7.

The air blown from the outlet 21a of the upright pipe 21 after heat exchange in the ground due to the rotation of the fan of the outdoor unit 7 of the air conditioner 3 and the suction fan 19 of the inlet 8 passes through the inner space of the cover 22. It is supplied to the outside air intake port 7a of the outdoor unit 7.
<Air conditioner>
As shown in FIG. 1, the air conditioner 3 includes an indoor unit 4 installed in a room 5 of a building 1, an outdoor unit 7 installed in a garage 2 of the building 1, and the indoor unit 4 and the outdoor unit 7. A circulating refrigerant path 23 (partially omitted) (see FIGS. 2 and 4).

  As shown in FIGS. 2 and 4, the refrigerant path 23 is mainly constituted by refrigerant pipes 24 and 25, and the refrigerant is conveyed through the refrigerant pipes 24 and 25.

  The refrigerant path 23 is connected to the room 5 and the garage 2 through the wall of the building 1, and the indoor unit 4 in the room 5 and the outdoor unit 7 in the garage 2 are connected to each other.

  Therefore, the air conditioner 3 described in the present embodiment has the same configuration as a general heat pump type air conditioner, and as described above, the air conditioner 3 cools and heats the room 5.

  Specifically, the indoor unit 4 of the air conditioner 3 exchanges heat between the refrigerant transferred through the refrigerant tubes 24 and 25 and the air in the room 5. The heat-exchanged refrigerant is heat-exchanged by the outdoor unit 7 with air in the garage 2 or air exchanged with the soil portion 2b (hereinafter abbreviated as temperature-controlled air).

  The cooling and heating of the air conditioner 3 will be described in more detail with reference to FIG.

  At the time of cooling, the gaseous refrigerant flowing into the compressor 26 through the refrigerant pipe 25 is compressed in the compressor 26 to be in a high pressure / high temperature state.

  In this state, the air flows into the heat exchanging unit 27 of the outdoor unit 7 and is heat-exchanged with the air in the garage 2 or the temperature-controlled air taken in from the outdoor air inlet 7a of the outdoor unit 7.

  At this time, the temperature of the refrigerant decreases and becomes liquid, and the temperature of the air in the garage 2 that has passed through the heat exchanging unit 27 or the temperature-controlled air rises and is discharged from the exhaust port 28.

  In addition, although the grill 28a is attached to the exhaust port 28 of the outdoor unit 7, in FIG. 2, it has shown in the removed state for convenience of understanding.

  Subsequently, the liquefied refrigerant is conveyed to the expansion valve 29, and the pressure is lowered at a stroke to be in a low pressure / low temperature state, and is conveyed in the liquid state through the refrigerant pipe 24 to the heat exchanger of the indoor unit 4 in the room 5. The

  On the other hand, as shown in FIG. 1, the indoor unit 4 in the building 1 takes in the air in the room 5 from its intake port, exchanges heat with the refrigerant conveyed to the heat exchanger of the indoor unit 4, and then from the air outlet. Drain into room 5.

  That is, the refrigerant of the air conditioner 3 takes the heat of the air in the room 5 in the indoor unit 4 and evaporates, and the air deprived of the heat blows out as cold air. As a result, the underground heat is used for air conditioning of the room 5.

  On the other hand, during heating, the refrigerant circulates in the opposite direction to that during cooling. That is, a high-pressure and high-temperature gaseous refrigerant is conveyed to the heat exchanger of the indoor unit 4, and the indoor unit 4 takes in the air in the room 5 from the intake port and changes it into hot air and blows it out from the blower port.

  And the refrigerant | coolant which took heat in the heat exchanger of the indoor unit 4 and became a liquid state is conveyed by the expansion valve 29 of the outdoor unit 7 of the garage 2 through the refrigerant pipe 24 shown in FIG. The refrigerant whose pressure is lowered at a stretch by the expansion valve 29 and is in a low pressure / low temperature state is conveyed to the heat exchanging unit 27 of the outdoor unit 7 in a liquid state.

  Subsequently, the refrigerant conveyed to the heat exchanging unit 27 exchanges heat with the air in the garage 2 or the temperature-controlled air taken in from the outside air inlet 7 a of the outdoor unit 7. As a result, the refrigerant becomes a gas and the temperature rises, and the temperature of the air in the garage 2 or the temperature-controlled air that has passed through the heat exchange unit 27 of the outdoor unit 7 is lowered and discharged from the exhaust port 28.

  Further, the gaseous refrigerant flowing into the compressor 26 from the heat exchanging unit 27 of the outdoor unit 7 is compressed in the compressor 26 to be in a high pressure / high temperature state, passes through the refrigerant pipe 25, and the indoor unit of the air conditioner 3. 4 is conveyed. As a result, the underground heat is used for air conditioning of the room 5.

  In addition, a remote controller 4a for operating the air conditioner 3 is provided in the room 5, and settings related to various controls of the geothermal heat utilization device 6 can be performed by the remote controller 4a.

In this setting, interlocking settings such as driving the geothermal air conditioning device 3 and driving the geothermal heat utilization device 6, controlling the amount of rotation of the suction fan 19 in the inflow portion 8 of the geothermal heat utilization device 6, etc. Can be set.
<Operation of underground heat utilization system>
Next, the effect | action of the underground heat utilization system of the building 1 of this Embodiment is demonstrated.

[Heat exchange effect]
The air conditioner 3 is turned on by operating the remote controller 4a of the indoor unit 4 to operate the air conditioner 3, and when the above-mentioned interlocking setting is performed, the suction fan 19 at the inlet 18a of the geothermal heat utilization device 6 is operated. Will operate in conjunction with this.

  Due to the rotation of the fan of the outdoor unit 7 and the suction fan 19 of the inflow part 8, the underground path 6a provided in the dirt part 2b of the garage 2 becomes negative pressure, and the air in the garage 2 is sucked from the inlet 18a. It is transported in the underground route 6a. Further, this air is transferred through the U-shaped heat collecting tube 12. The air sucked during this transfer exchanges heat with the soil portion 2b of the garage 2.

  If the temperature of the air in the garage 2 sucked in is higher than the temperature of the dirt part 2b as in the summer, the heat of the air moves to the dirt part 2b during this transfer, and the temperature of the air is lowered. Air having a temperature lower than that of the air is blown out from the outflow portion 9.

  On the contrary, if the temperature of the air in the garage 2 sucked in is lower than the temperature of the dirt part 2b as in winter, the heat of the dirt part 2b moves to the air during the transfer of the underground path 6a and the temperature rises. Then, air having a temperature higher than that in the garage 2 is blown out from the outflow portion 9.

  The blown air is heat-exchanged with the refrigerant passing through the heat exchanging portion 27 of the outdoor unit 7 in the garage 2 as already described. As a result, the underground heat is used for the air conditioner 3, and the heat is exchanged more efficiently than the outside air outside the building 1 (when the garage shutter is opened) and the air inside the garage 2.

By the way, the temperature of the dirt section 2b of the garage 2 is lower in summer and higher in winter than the temperature of the ground portion G around the building 1 due to leakage heat from the building 1. And since the heat | fever utilization apparatus 6 is provided in this dirt part 2b, it will heat-exchange more efficiently than the case where it provides around the building 1. FIG.
[Operation efficiency of air conditioner]
The garage 2 is not easily affected by the outdoor environment outside the building 1, and the outdoor unit 7 of the air conditioner 3 is provided in the garage 2. A decrease in operating efficiency during cooling operation can be prevented.

  Similarly, the heat collecting pipe 12 of the geothermal heat utilization device 6 is provided in the soil portion 2b, and the floor surface of the garage 2 is not directly exposed to the solar radiation in the summer season or is a part even if it hits. The temperature rise in the dirt section 2b of the garage 2 due to solar radiation in summer is suppressed. Therefore, compared with the case where it is provided around the building 1, it is less affected by solar radiation, has a high heat exchange efficiency, and leads to an improvement in the operation efficiency of the air conditioner 3.

  Further, during the cooling operation of the air conditioner 3, since the cold heat of the air conditioner 3 leaks from the room 5 of the building 1 directly under the garage 2 or the building 1, the air in the garage 2 or the dirt portion 2 b of the garage 2 is provided. The cold heat is recovered by the heat collecting tube 12 or the like of the underground path 6a.

  And since the collect | recovered cold heat is finally collected by the heat exchange part 27 of the outdoor unit 7 in the garage 2 by the geothermal heat utilization apparatus 6, and it is made to heat-exchange with the refrigerant | coolant of the outdoor unit 7, collection | recovery of the leaked cold heat | fever・ Can be reused. Therefore, the air conditioner 3 can be operated more efficiently.

  On the other hand, since the outdoor unit 7 is provided in the garage 2 in the case of the winter season, no radiative cooling occurs when the outdoor unit 7 is installed outside the building 1, and the operation during the heating operation of the air conditioner 3 is performed by radiative cooling. Efficiency is not reduced.

  The height of the winter day is lower than that of summer, and since the solar radiation is likely to hit the dirt section 2b provided with the heat collecting pipe 12 of the underground heat utilization device 6, the temperature easily rises.

  Moreover, since the heat of the air conditioner 3 leaks from the room 5 of the building 1 to the garage 2 or directly under the building 1 during the heating operation of the air conditioner 3, the air provided in the garage 2 or the ground portion 2 b of the garage 2 is provided. This heat is recovered in the middle path 6a.

  And since the collect | recovered warm heat is finally collected by the heat exchange part 27 of the outdoor unit 7 in the garage 2 by the geothermal heat utilization apparatus 6, and it is made to heat-exchange with the refrigerant | coolant of the outdoor unit 7, collection | recovery of the leaked warm heat・ Can be reused. Therefore, the air conditioner 3 can be operated more efficiently.

Immediately after parking in the garage 2, for example, the air in the garage 2 or the soil portion 2 b is heated by the residual heat of the engine of the car M or the electric motor, but the underground heat provided in the garage 2 Such residual heat can be recovered by the utilization device 6.
[Maintenance improvement]
Since the underground heat utilization device 6 and the outdoor unit 7 of the air conditioner 3 are provided in the garage 2, when maintaining them, the dirt portion 2b of the garage 2 can be used as a work space for maintenance.

  Since maintenance work is performed in the garage 2, maintenance can be performed regardless of the outdoor weather conditions (rainfall, snowfall, etc.) of the building 1. Moreover, since the underground heat utilization apparatus 6 and the outdoor unit 7 of the air conditioner 3 are provided in the garage 2, they are not exposed to wind and rain, and dirt is difficult to adhere.

Moreover, since the opening 13 for maintenance of the underground heat utilization apparatus 6 is provided in the dirt part 2b of the garage 2 so that it may face in the garage 2, and it can be opened and closed by the cover body 16, the cover body 16 is removed. Thus, the heat collecting tube 12 and the like in the dirt portion 2b can be easily taken out, and maintenance is easy.
<Effect of geothermal heat utilization system>
Hereinafter, the effect of the underground heat utilization system of the embodiment according to the present invention will be described.

  This ground heat utilization system circulates through the indoor unit 4 installed in the room 5 of the building 1 having the garage 2, the outdoor unit 7 installed in the garage 2 of the building 1, and the indoor unit 4 and the outdoor unit 7. An air conditioner 3 having a refrigerant, and an underground path 6a provided in the ground below the floor surface of the dirt portion 2b of the garage 2 in order to allow the air in the garage 2 to pass through and exchange heat with the dirt portion 2b of the garage 2. The air inlet 18a provided in the garage 2 for allowing the air in the garage 2 to flow into the underground path 6a, and the heat exchange section 27 of the outdoor unit 7 with the air in the garage 2 that has passed through the underground path 6a. Since it has the underground heat utilization apparatus 6 which has the outflow port 21a of the air in the garage 2 provided so that the refrigerant | coolant which has passed can be heat-exchanged, the air conditioner 3 and the garage 2 are For each building 1 It can be provided by installing a geothermal heat system.

  It is not necessary to provide the underground heat utilization device 6 and the outdoor unit 7 of the air conditioner 3 around the building 1, and the site of the building 1 can be effectively utilized without being unnecessarily occupied.

  FIG. 5 is a diagram illustrating another geothermal heat utilization system of the building 1 according to the embodiment.

  The geothermal heat utilization system of the example extends the heat collecting pipe 12 of the geothermal heat utilization device 6 provided in the soil portion 2b in the embodiment downward from the soil portion 2b of the garage 2 and mainly uses the ground portion G1. It differs in the point provided so that it may heat-exchange, and another structure is the same structure as the geothermal heat utilization system of embodiment.

  In other words, the geothermal heat utilization system of the example is the air conditioner 3 already described in the embodiment, and the underground path 6ab provided mainly in the ground portion G1 below the soil portion 2b of the garage 2 and in the garage 2 The underground heat utilization device 6A having an inflow part 8 for allowing the air to flow into the underground path 6ab and an outflow part 9 for allowing the air to flow out from the underground path 6ab. Also in FIG. 5, the illustration of the connection member 11 is omitted for convenience of understanding.

  According to the geothermal heat utilization system of this example, in addition to the operation and effect of the geothermal heat utilization system of the embodiment, the soil portion 2b of the garage 2 performs the same function as a so-called heat insulating material. The heat and heat that are particularly likely to accumulate in the ground portion G1 directly below 2b are efficiently recovered by the heat collecting pipe 12A, and the heat exchange efficiency of the underground heat utilization device 6A is improved. As a result, the operating efficiency of the air conditioner 3 is also increased.

  As described above, the geothermal heat utilization system according to the present invention has been described based on the embodiments and examples. However, the specific configuration is not limited to these embodiments and examples. Design changes and additions are permitted without departing from the spirit of the invention according to each claim of the scope.

  Although the outdoor unit 7 of the air conditioner 3 and the air outlet 21a in the garage 2 are provided in the garage 2 in the embodiment and the examples, they may be provided in the building 1 or its surroundings.

  Here, in the embodiment and the examples, the underground passages 6a and 6ab are provided in the ground below the garage 2 (the interstitial portion 2b and the ground portion G1), and thereby the air in the garage 2 that exchanges heat with the ground. Is blown out to the outside air inlet 7a of the outdoor unit 7 installed in the garage 2, but is not limited to this configuration, and heat exchange is performed with the refrigerant passing through the heat exchanging unit 27 of the outdoor unit 7. Any configuration can be used.

  For example, a liquid refrigerant, a gaseous refrigerant, or the like may be used instead of air as the heat transfer fluid, and the inlet 18a and the outlet 21a in the garage 2 may be connected and circulated.

  In this case, it is necessary to separately provide a heat exchanger or a delivery pump for exchanging heat with the air in the garage 2.

  In particular, when a liquid refrigerant is used, the refrigerant cannot be directly blown out to the outside air inlet 7a of the outdoor unit 7 because the refrigerant is not a gas.

  Therefore, for example, by providing a heat exchanger for exchanging heat between the heat exchange unit 27 of the outdoor unit 7 and the liquid refrigerant that has passed through the underground paths 6a and 6ab, heat exchange using the underground heat is performed. May be. With such a configuration, the heat exchange efficiency is further improved.

  In addition, an extension part is provided in the standing pipe 18 so that the length of the standing pipe 18 of the inflow part 8 standing from the floor surface of the garage 2 can be changed so that the height position of the inlet 18a in the garage 2 can be adjusted. May be.

  By doing in this way, with the garage shutter 2a closed, for example, in the winter season, the air that is warm as much as possible is drawn by sucking warmer air near the ceiling of the garage 2 and exchanging heat with the ground. It is possible to perform heating operation with higher efficiency of the air conditioner 3 by providing it to the three outdoor units 7.

  On the other hand, in the summer, with the garage shutter closed, for example, by setting the height of the suction port closer to the floor of the garage 2, the cooler air can be removed from the outdoor unit of the air conditioner 3. 7, the air conditioning apparatus 3 can be operated with higher efficiency.

  As another configuration, if the soil portion 2b provided with the underground path 6a is made of another material having higher thermal conductivity than the ground portion G1, the cooling and heat leaking from the building 1 can be efficiently guided to the soil portion 2b. It can also be recovered from the underground route 6a.

DESCRIPTION OF SYMBOLS 1 ... Building 2 ... Garage 2b ... Dirt part 2a ... Garage shutter 3 ... Air conditioner (heat pump)
4 ... Indoor unit 4a ... Remote control 5 ... Indoors 6, 6A ... Geothermal heat utilization devices 6a, 6ab ... Underground path 7 ... Outdoor unit 7a ... Outside air intake 8 ... Inflow part 9 ... Outflow part 10 ... Annular pipe 11 ... Connection member 12, 12A ... Heat collecting pipe 15 ... Insertion / removal hole 16 ... Lid 18 ... Standing up Pipe 18a ... Inlet 19 ... Suction fan 21 ... Standing pipe 21a ... Outlet 22 ... Cover portions 24, 25 ... Refrigerant pipe 26 ... Compressor 27 ... Heat Exchange part 28 ... exhaust port 29 ... expansion valve
G1 ... Ground part
M ... car

Claims (6)

An underground path provided in the ground below the floor surface of the dirt section of the garage provided in the building for allowing the heat carrier fluid to pass through and exchanging heat with the ground, and the heat transport fluid into the underground path A ground heat utilization device having an inflow port provided in the garage and an outflow port provided in the garage so that the heat carrier fluid that has passed through the underground path is blown out,
An indoor unit installed in a room of the building, an outdoor unit installed inside the garage, and a heat pump system having a refrigerant circulating through the indoor unit and the outdoor unit, and a heat carrier fluid blown out from the outlet The geothermal heat utilization system, wherein the outflow port is provided so as to exchange heat with a refrigerant passing through a heat exchange part of the outdoor unit.   The ground heat utilization system according to claim 1, wherein a shutter that can be opened and closed is provided at an entrance of the garage.   The ground heat utilization system according to claim 1 or 2, wherein a detachable dustproof filter is provided at the inlet. The geothermal heat utilization system according to any one of claims 1 to 3 , wherein the underground route is provided so as to mainly pass through a dirt portion of the garage. The underground heat utilization system according to any one of claims 1 to 3 , wherein the underground route is provided so as to mainly pass through a ground portion directly below the soil portion of the garage.   The geothermal heat utilization system according to any one of claims 1 to 5, wherein an opening for maintenance of the geothermal heat utilization device is provided in a soil portion of the garage.