JP2012063032A - Terrestrial heat utilizing system for air-conditioning - Google Patents

Abstract

An air-conditioning geothermal heat utilization device capable of utilizing an existing air-conditioning device with a simple configuration is provided.
An indoor unit 2 installed in a house 1 for exchanging heat with air in a room 11, an outdoor unit 3 for exchanging heat with air taken in from an outside air intake 31, an indoor unit and an outdoor unit It is an air-conditioning ground heat utilization device for using ground heat for an air-conditioning device provided with a refrigerant path 4 circulating through the machine.
And the underground pipe 5 formed in the ground below the house, the suction port 51 for taking in air provided at one end thereof, and the other end of the underground pipe and taking in the outside air of the outdoor unit A discharge port 52 for supplying air to the mouth and a fan 53 for transferring air in the underground pipe are provided.
[Selection] Figure 1

Description

  The present invention relates to a ground heat utilization apparatus for air conditioning for using ground heat for an air conditioner including an outdoor unit that performs heat exchange with air taken in from an outside air intake.

  2. Description of the Related Art Conventionally, air conditioning systems that improve the efficiency of residential air conditioning devices by using geothermal heat and reduce energy consumption such as electricity and gas are known (see Patent Documents 1-3).

  Patent Document 1 discloses a geothermal air conditioning system that allows outside air to pass through an underground tube so that the temperature of the outside air is brought close to the underground temperature, and the outside air that passes through the underground tube is supplied to the interior of a house. A system is disclosed.

  In other words, the underground temperature is lower in the summer than in the outdoor air and high in the winter.Therefore, by taking the outdoor air that has been brought close to the underground temperature indoors, the indoor can be cooled in the summer and indoors in the winter. Can warm up.

  Further, in Patent Documents 2 and 3, a double pipe in which an inner pipe having a lower end is accommodated in an outer pipe having a lower end closed is driven into the ground below the house in a vertical direction, An underground heat-utilizing air conditioning system that takes in and uses underground heat by circulating gas through a pipe and an inner pipe is disclosed.

JP 2003-35433 A Japanese Patent No. 4457571 Japanese Patent Laid-Open No. 2005-9737

  However, since the geothermal air conditioning system disclosed in Patent Document 1 takes outside air directly indoors, it is directly affected when the outside air is contaminated. In addition, since the outside air that has passed through the ground is used as it is, it is difficult to perform air conditioning with stable temperature and humidity.

  Moreover, in the ground heat utilization air conditioning system of patent documents 2 and 3, it is necessary to drive a double pipe | tube toward a perpendicular direction like a pile, and installation takes time and expense. In other words, when trying to secure the required flow path area for the forward path and the return path with the double pipe, the outer diameter of the outer pipe becomes larger than that of the single pipe. is there.

  Therefore, an object of the present invention is to provide a ground heat utilization device for air conditioning that can utilize an existing air conditioning device with a simple configuration.

  In order to achieve the above object, the ground heat utilization device for air conditioning according to the present invention includes an indoor unit installed in a building and performing heat exchange with air in the building, and air and heat taken in from an outside air intake. An air-conditioning geothermal heat utilization device for using geothermal heat to an air-conditioning device comprising an outdoor unit that performs exchange and a path of a heat transfer fluid that circulates between the indoor unit and the outdoor unit. An underground path formed in the ground below or around the building, an inlet for taking in air provided at one end of the underground path, and the other end of the underground path and the outdoor unit It is characterized by comprising a discharge port for supplying air to the outside air intake port and a blower for transferring the air in the underground path.

  Here, it can be set as the structure provided with the cover part which covers between the said discharge port and the external air intake port of the said outdoor unit. Moreover, it is preferable that the said building is a basic heat insulation structure and the said underground route | route is a structure which passes under the said building.

  Furthermore, it can be set as the structure provided with the heat insulation part which covered the ground surface above the said underground path | route with the heat insulating material. The suction port may be provided adjacent to the exhaust port of the outdoor unit.

  The ground heat utilization device for air conditioning of the present invention configured as described above uses a simple underground path in which an inlet is provided at one end and an outlet is provided at the other end, and the underground is transferred. The outside air is supplied to the outside air intake port of the outdoor unit.

  For this reason, it is possible to improve the air-conditioning efficiency using the underground heat even for the existing air-conditioning apparatus. Moreover, since it is not necessary to modify the structure of the outdoor unit of the air conditioner, it can be easily arranged even after the air conditioner is installed.

  Further, by covering the space between the discharge port of the underground route and the outside air intake port of the outdoor unit with the cover portion, it is possible to efficiently send the outside air heat-exchanged in the ground toward the outside air intake port.

  Also, if the building has a basic thermal insulation structure and the underground route passes through it, even if the underground route is buried in the horizontal direction at a shallow position on the ground, It is possible to use geothermal heat at a stable temperature that is not easily affected by temperature.

  Furthermore, even if the underground route is not formed under the building, it is possible to use the underground heat at a stable temperature by covering the ground surface with the heat insulating portion. Further, when the underground route is not provided under the building, it can be easily installed even after construction, and maintenance is facilitated.

  In addition, by providing the underground route suction port adjacent to the outdoor unit exhaust port, it is possible to prevent the exhaust heat or cold heat of the outdoor unit from diffusing to the surroundings and to preserve the surrounding environment.

It is explanatory drawing which showed typically the structure of the ground-heat utilization apparatus for an air conditioning of embodiment of this invention. It is a perspective view explaining the structure around an outdoor unit. It is explanatory drawing which showed typically the structure of the ground heat utilization apparatus for an air conditioning of Example 1. FIG. It is explanatory drawing which showed typically the structure of the ground heat utilization apparatus for an air conditioning of Example 2. FIG. It is explanatory drawing which showed typically the structure of the ground-heat utilization apparatus for an air conditioning of Example 3. FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view schematically showing a configuration in which a ground heat utilization device for air conditioning according to the present embodiment is arranged in a house 1 as a building.

  This house 1 is constructed on a heat insulating foundation 12 so as to have a basic heat insulating structure. And the indoor unit 2 of an air conditioner is installed in the wall of the room | chamber interior 11 shown typically. Further, the indoor unit 2 is connected to the outdoor unit 3 through a refrigerant path 4 piped to the outdoor 13.

  That is, the air conditioner described in the present embodiment is a heat pump type in which the indoor unit 2 that performs heat exchange with the air in the room 11 and the outdoor unit 3 that performs heat exchange with the air in the outdoors 13 are connected by the refrigerant path 4. It is an air conditioner.

  This air conditioner will be described in more detail with reference to FIG. Two refrigerant pipes 41 and 42 are piped in the refrigerant path 4 serving as a path for the heat transfer fluid, and the refrigerant (not shown) is conveyed through the inside.

  This refrigerant is a heat transfer fluid circulated between the indoor unit 2 and the outdoor unit 3, and the transfer direction is reversed during cooling and heating. For example, during cooling, the gaseous refrigerant flowing into the compressor 33 through the refrigerant pipe 42 is compressed in the compressor 33 to be in a high pressure / high temperature state.

  And in that state, it flows into the heat exchanging unit 35 of the outdoor unit 3 and exchanges heat with the outside air taken in from the outside air intake port 31 of the outdoor unit 3. At this time, the temperature of the refrigerant decreases and becomes liquid, and the temperature of the outside air that has passed through the heat exchange unit 35 increases and is discharged from the exhaust port 32.

  Subsequently, the liquefied refrigerant is conveyed to the expansion valve 34, and the pressure is lowered at a stroke to be in a low pressure / low temperature state and is conveyed to the indoor unit 2 through the refrigerant pipe 41 while remaining in a liquid state.

  On the other hand, as shown in FIG. 1, in the indoor unit 2, the air in the room 11 is taken in from the intake port 21 and the air taken in from the blower port 22 is discharged. There is a heat exchanger 23 between the air inlet 21 and the air outlet 22, and low-temperature refrigerant flows into the heat exchanger 23 from the refrigerant pipe 41.

  In the heat exchanger 23 of the indoor unit 2, the refrigerant indirectly touching the air in the room 11 takes the heat in the air, evaporates, and changes into a gas. The air deprived of heat is blown out from the air outlet 22 into the room 11 as cold air.

  In contrast, 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 23 of the indoor unit 2, and the air in the room 11 taken in from the intake port 21 is changed to warm air and blown out from the blower port 22.

  Then, the refrigerant that has been deprived of heat in the heat exchanger 23 and is in a liquid state is conveyed to the expansion valve 34 of the outdoor unit 3 through the refrigerant pipe 41. The refrigerant whose pressure is lowered at a stretch by the expansion valve 34 and is in a low pressure / low temperature state is conveyed to the heat exchanging unit 35 in a liquid state.

  Subsequently, the refrigerant conveyed to the heat exchange unit 35 exchanges heat with the outside air taken in from the outside air intake port 31 of the outdoor unit 3. As a result, the refrigerant becomes a gas and the temperature rises, and the temperature of the outside air that has passed through the heat exchange unit 35 falls and is discharged from the exhaust port 32.

  Further, the gaseous refrigerant flowing into the compressor 33 from the heat exchange unit 35 is compressed in the compressor 33 to be in a high pressure / high temperature state, and is conveyed toward the indoor unit 2 through the refrigerant pipe 42.

  With respect to such an air conditioner, the ground heat utilization device for air conditioning according to the present embodiment is underground as an underground route embedded in the ground G under the heat insulating foundation 12 of the house 1 as shown in FIG. The buried pipe 5, the suction port 51 for taking in outside air provided at one end of the underground pipe 5, the discharge port 52 provided at the other end of the underground pipe 5, and the air in the underground pipe 5 And a fan 53 as a blower for transferring the air.

  This underground pipe 5 is formed with a continuous through passage, and is constructed of a pipe material such as a steel pipe or a vinyl chloride pipe. One end of both ends of the underground pipe 5 that are opened serves as the suction port 51, and the other end serves as the discharge port 52.

  In FIG. 1, the underground pipe 5 rising from the ground G on the left side of the house 1 is bent downward to prevent rainwater from entering, and an inlet 51 is provided at the end thereof.

  The underground pipe 5 extending horizontally below the heat insulating foundation 12 of the house 1 is raised from the ground G on the right side of the house 1 and discharged toward the outside air intake 31 of the outdoor unit 3. An outlet 52 is provided.

  A fan 53 is connected to the opening of the discharge port 52 as shown in FIGS. When the fan 53 is operated, the inside of the underground pipe 5 becomes negative pressure, and the outside air around the suction port 51 is sucked into the suction port 51 and is transferred through the underground pipe 5.

  And if the temperature of the sucked outside air is higher than the temperature in the ground, the heat of the outside air moves into the ground during this transfer, the temperature of the outside air (air) decreases, and the temperature of the outside air around the house 1 is lower. Air is discharged from the discharge port 52.

  On the other hand, if the temperature of the sucked outside air is lower than the underground temperature, the underground heat moves to the outside air during the transfer of the underground pipe 5 and the temperature of the outside air (air) rises. Air having a temperature higher than the outside air is discharged from the discharge port 52.

  In addition, as shown in FIG. 2, the space between the fan 53 and the outside air intake port 31 of the outdoor unit 3 is covered with a cover portion 6. One end of the cover portion 6 is formed in a cross-sectional shape that is substantially the same size as the blower outlet (not shown) of the fan 53, and gradually spreads from there to the other end at the outside air inlet 31. The cross-sectional shape is approximately the same size.

  Then, the air blown out from the fan 53 is supplied to the outside air inlet 31 of the outdoor unit 3 through the inner space of the cover unit 6.

  Next, the operation of the air conditioning ground heat utilization apparatus of the present embodiment will be described.

  The air-conditioning geothermal heat utilization apparatus of the present embodiment configured as described above uses the underground pipe 5 having a simple configuration in which the suction port 51 is provided at one end and the discharge port 52 is provided at the other end. The outside air (air) transferred through the ground is discharged toward the outside air intake 31 of the outdoor unit 3.

  The air discharged through the underground pipe 5 is lower in temperature than the outside air in the summer when the cooling is performed, and higher than the outside air in the winter when the heating is performed.

  For this reason, it is possible to lower the temperature of the refrigerant more efficiently than when heat is exchanged by the heat exchanging unit 35 using the outside air as it is during cooling, and conversely, the temperature of the refrigerant can be raised efficiently during heating. Can do.

  Moreover, since this underground heat utilization device for air conditioning can be installed without modifying the structure of the outdoor unit 3 of the air conditioning device, it can be easily applied even when the air conditioning device is already installed. Can do.

  Furthermore, the cover portion 6 covers the space between the discharge port 52 of the underground pipe 5 and the outside air intake port 31 of the outdoor unit 3 so that the heat exchanged in the ground is mixed with the outside air around the outdoor unit 3. Since it is sent toward the outside air intake port 31 without matching, the underground heat can be used efficiently.

  Moreover, if the house 1 has a basic heat insulating structure built on the heat insulating foundation 12, the underground pipe 5 is laterally moved to a shallow position of the ground G by passing the underground pipe 5 below. Even if it is buried toward the ground, it is difficult to be affected by solar heat and outside air temperature, and it is possible to use geothermal heat at a stable temperature.

  For this reason, the effort and expense for burying underground burial pipe 5 do not become so much, and it can be set as a cheap and efficient ground-heat utilization apparatus for air conditioning.

  Hereinafter, Example 1 of a form different from the above-described embodiment will be described with reference to FIG. The description of the same or equivalent parts as those described in the above embodiment will be given the same reference numerals.

  The underground pipe 5 </ b> A as the underground route described in the first embodiment is raised from the ground G so that the suction port 51 and the discharge port 52 are arranged on the same side of the house 1. .

  That is, in FIG. 3, the underground pipe 5 </ b> A in which the suction port 51 is provided on the ground G on the right side of the house 1 is horizontally extended toward the lower side of the house 1 and is folded back near the center. The deep underground is turned back and is raised again from the ground G on the right side of the house 1, and a discharge port 52 directed to the outside air intake port 31 of the outdoor unit 3 is provided.

  Thus, if it is the structure which provides the suction port 51 and the discharge port 52 in the side part of the same side of the house 1, even if it is a case where an installation place can be ensured only in one side part of the house 1, it is in the ground for air conditioning. A heat utilization device can be installed.

  Further, if the suction port 51 and the discharge port 52 are provided close to each other, maintenance work and the like can be easily performed.

  Other configurations and functions and effects are substantially the same as those in the above-described embodiment, and thus description thereof is omitted.

  Hereinafter, Example 2 of a form different from the above-described embodiment and Example 1 will be described with reference to FIG. The description of the same or equivalent parts as those described in the above embodiment or Example 1 will be given the same reference numerals.

  The underground pipe 5B as an underground route described in the second embodiment is provided with an inlet 51 and an outlet 52 on the same side of the house 1 as in the first embodiment. The position 51 is different from that of the first embodiment.

  In the second embodiment, the suction port 51 of the underground buried pipe 5B is provided adjacent to the exhaust port 32 of the outdoor unit 3. The underground pipe 5B extending horizontally from the suction port 51 toward the lower side of the house 1 is folded back near the center and turned back in the shallow part from the forward path, and again the ground on the right side of the house 1 A discharge port 52 which is started from G and faces the outside air intake port 31 of the outdoor unit 3 is provided.

  Thus, by providing the suction port 51 of the underground pipe 5B adjacent to the exhaust port 32 of the outdoor unit 3, the temperature is increased (during cooling) or decreased from the surrounding outside air used for heat exchange with the refrigerant. It is possible to prevent the air (during heating) from diffusing around. As a result, it is possible to prevent a person in the vicinity from feeling uncomfortable or deteriorating the surrounding environment due to the exhaust heat or cold heat of the outdoor unit 3.

  Other configurations and functions and effects are substantially the same as those of the above-described embodiment or other examples, and thus description thereof is omitted.

  Hereinafter, a third embodiment different from the above-described embodiment and first and second embodiments will be described with reference to FIG. The description of the same or equivalent parts as those described in the embodiment or Examples 1 and 2 will be given with the same reference numerals.

  The underground pipe 5C as the underground route described in the third embodiment is provided with a suction port 51 and a discharge port 52 on the same side of the house 1 as in the first embodiment. The point from which the embedded pipe 5C is extended in the vertical direction is different from the first embodiment.

  As shown in FIG. 5, the underground pipe 5 </ b> C of the third embodiment is provided with a suction port 51 on the ground G around the house 1, extends vertically downward, and is folded back in the deep underground. A discharge port 52 is provided that is turned up vertically and is raised again from the ground G around the house 1 and directed toward the outside air intake 31 of the outdoor unit 3.

  Further, near the surface of the ground G in which the underground pipe 5C is buried, a ground heat insulating portion 71 in which a heat insulating material is spread is provided. Furthermore, a heat insulating material is arranged in a wall shape in the vertical direction, and the underground heat insulating portion 72 is provided.

  By arranging the heat insulating material around the underground pipe 5C in this way, it is possible to prevent solar heat, outside air temperature, etc. from being transmitted to the ground G around the underground pipe 5C, and to stabilize the ground at a stable temperature. Medium heat can be used.

  Furthermore, since the underground heat utilization apparatus for air conditioning according to the third embodiment does not need to extend the underground pipe 5C below the house 1, it can be easily installed even after the house 1 is constructed. Moreover, if it is installed in a place different from the place where the house 1 is constructed, maintenance can be easily performed without modifying the house 1.

  Other configurations and functions and effects are substantially the same as those of the above-described embodiment or other examples, and thus description thereof is omitted.

  Although the best embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment or example, and the design does not depart from the gist of the present invention. Such modifications are included in the present invention.

  For example, in the said embodiment and Example, although the case where it applied with respect to the air conditioner installed in the house 1 was demonstrated, it is not limited to this, The air conditioner installed in buildings other than the house 1 It can also be applied to.

  Moreover, in the said embodiment and Example, although the case where the indoor unit 2 was installed in the room 11 was demonstrated, it is not limited to this, An indoor unit is installed in the underfloor space as indoor, and underfloor air conditioning is carried out. The present invention can also be applied to the outdoor unit 3 when performing.

  Furthermore, in the said embodiment and Example, although the fan 53 was provided adjacent to the discharge port 52 of the underground pipes 5 and 5A-5C, it is not limited to this, The fan 53 is used as the suction port 51. It can also be provided on the side or in the middle of the underground pipe 5.

  Moreover, in the said embodiment, although between the fan 53 and the external air intake port 31 of the outdoor unit 3 was covered with the cover part 6, it is not limited to this, The discharge port 52 is the external air intake port 31. The cover portion 6 may not be provided if the cover portion 6 is disposed in the vicinity.

1 Housing (building)
11 Indoor (indoor)
12 Insulation foundation (basic insulation structure)
13 Outdoor 2 Indoor unit 3 Outdoor unit 31 Outside air intake port 32 Exhaust port 4 Refrigerant route (heat carrier fluid route)
41, 42 Refrigerant pipe 5, 5A-5C Underground pipe (underground route)
51 Inlet port 52 Outlet port 53 Fan (blower)
6 Cover part 71 Ground surface heat insulation part (heat insulation material)
72 Underground insulation (insulation)
G Ground (underground)

Claims (5)

An indoor unit that is installed in the building and exchanges heat with the air in the building, an outdoor unit that exchanges heat with the air taken in from the outside air intake, and heat that circulates between the indoor unit and the outdoor unit An air-conditioning geothermal heat utilization device for using geothermal heat with respect to an air-conditioning device provided with a transport fluid path,
An underground path formed in the ground below or around the building, an inlet for taking in air provided at one end of the underground path, and the other end of the underground path and the outdoor unit A ground heat utilization apparatus for air conditioning comprising an exhaust port for supplying air to an outside air intake port and a blower for transferring air in the underground path.   The geothermal heat utilization apparatus for air conditioning according to claim 1, further comprising a cover portion that covers a space between the discharge port and an outside air intake port of the outdoor unit.   The said building is a basic heat insulation structure, The said underground path | route passes under the said building, The ground-heat utilization apparatus for air conditioning of Claim 1 or 2 characterized by the above-mentioned.   The ground heat utilization apparatus for air conditioning as described in any one of Claims 1 thru | or 3 provided with the heat insulation part which covered the ground surface above the said underground path | route with the heat insulating material.   The ground heat utilization apparatus for air conditioning according to any one of claims 1 to 4, wherein the suction port is provided adjacent to an exhaust port of the outdoor unit.