JP4806260B2 - Geothermal air conditioner - Google Patents

Geothermal air conditioner Download PDF

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JP4806260B2
JP4806260B2 JP2006000398A JP2006000398A JP4806260B2 JP 4806260 B2 JP4806260 B2 JP 4806260B2 JP 2006000398 A JP2006000398 A JP 2006000398A JP 2006000398 A JP2006000398 A JP 2006000398A JP 4806260 B2 JP4806260 B2 JP 4806260B2
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潤一 栗原
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Misawa Homes Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
    • F24T10/00—Geothermal collectors
    • F24T10/10—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/40—Geothermal heat-pumps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/10—Geothermal energy

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  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Other Air-Conditioning Systems (AREA)

Description

本発明は、地熱を室内の空調に利用することができる地熱利用空調装置に関する。 The present invention relates to a geothermal air ChoSo location which can utilize geothermal indoor air conditioning.

外気を室内に取り入れるとともに室内の空気を屋外に排気するような空調の際に、前記外気と屋内の空気との間で熱交換を行うようにした技術の一例として特許文献１に記載のものが知られている。この技術では、外気を室内に取り入れる供給側配管と、室内の空気を屋外に排気する排気側配管とを備え、供給側配管を通る空気と排気側配管を通る空気との間で熱交換を行うようになっている。   As an example of a technique in which heat is exchanged between the outside air and the indoor air during air conditioning in which the outside air is taken into the room and the indoor air is exhausted to the outside, the one described in Patent Document 1 is disclosed. Are known. This technology includes a supply-side pipe that takes outside air into the room and an exhaust-side pipe that exhausts indoor air to the outside, and performs heat exchange between the air that passes through the supply-side pipe and the air that passes through the exhaust-side pipe. It is like that.

また、地熱を利用した空調システムの一例として特許文献２に記載のものが知られている。この技術では、水給送用ポンプが介在された水循環経路に、地中に垂直に埋設された第１パイプの内部空間によって形成される第１内部通路と地上に設置された気水熱交換器の水通路とが含まれ、上記気水熱交換器の空気通路を通過中に上記水通路内の水との間で熱交換を行った空気を建物の空調に利用するようになっている。
特許第３０５９７２８号公報 特許第３４４０３３１号公報 Moreover, the thing of patent document 2 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. 3059728 Japanese Patent No. 3340331

ところで、前記特許文献１に記載の技術では、空調を行う際に外気と屋内の空気との間で熱交換を行うようにしているが、外気と室内の空気との温度差が大きい場合、熱交換されて室内に導入される外気と室内の空気の温度差も比較的大きくなるので、室内の空気を所望の温度に保持するために冷暖房装置が消費するエネルギー（電力等）が大きくなる。
また、特許文献２に記載の技術では、地熱を建物の空調に利用するようになっているが、上記のような外気と屋内の空気との間で熱交換を行うようにした空調には利用されていない。 By the way, in the technique described in Patent Document 1, heat exchange is performed between outside air and indoor air when air conditioning is performed. However, when the temperature difference between outside air and indoor air is large, Since the temperature difference between the outside air exchanged and introduced into the room and the room air becomes relatively large, energy (electric power, etc.) consumed by the air conditioner to keep the room air at a desired temperature is increased.
Moreover, in the technique described in Patent Document 2, geothermal heat is used for air conditioning of a building, but it is used for air conditioning in which heat is exchanged between the outside air and indoor air as described above. It has not been.

本発明は上記事情に鑑みてなされたもので、外気と屋内の空気との間で熱交換を行うようにした空調において、地熱を有効に利用できる地熱利用空調装置を提供することを課題としている。 The present invention has been made in view of the above circumstances, problems in air conditioning which is adapted for heat exchange between the outside air and indoor air, to provide a geothermal air ChoSo location that can be effectively used geothermal It is said.

請求項１に記載の発明は、例えば図１〜図３に示すように、地熱利用空調装置であって、地中に埋設された地中熱交換部１と、この地中熱交換部１と室内との間で熱媒体（例えば水）を循環させる循環経路３と、前記室内に設けられかつ前記循環経路３の途中が接続された熱放熱部２と、熱交換換気装置４とを備え、
前記熱交換換気装置４は、外気を室内に取り入れる供給側配管７と、室内の空気を屋外に排気する排気側配管８と、供給側配管７を通る空気と排気側配管８を通る空気との間で熱交換を行う第１熱交換部９と、
前記循環経路３から分岐して再び該循環経路に至る分岐経路６の途中に接続され、この分岐経路６を通る前記熱媒体と前記供給側配管７を通る空気との間で熱交換を行う第２熱交換部１０とを備え、
前記循環経路３と分岐経路６との分岐部には、切替バルブ５が設けられていることを特徴とする。 The invention according to claim 1 is a geothermal air conditioner, for example, as shown in FIGS. 1 to 3, and includes a ground heat exchange unit 1 buried in the ground, and the ground heat exchange unit 1. A circulation path 3 for circulating a heat medium (for example, water) between the room, a heat radiating unit 2 provided in the room and connected in the middle of the circulation path 3, and a heat exchange ventilator 4;
The heat exchange ventilator 4 includes a supply side pipe 7 for taking outside air into the room, an exhaust side pipe 8 for exhausting indoor air to the outdoors, and air passing through the supply side pipe 7 and air passing through the exhaust side pipe 8. A first heat exchanging unit 9 for exchanging heat between them,
A second branch that branches from the circulation path 3 and is connected in the middle of the branch path 6 that reaches the circulation path again, and performs heat exchange between the heat medium passing through the branch path 6 and the air passing through the supply side pipe 7. 2 heat exchanger 10 and
A switching valve 5 is provided at a branch portion between the circulation path 3 and the branch path 6 .

請求項１に記載の発明によれば、熱交換換気装置４の供給側配管７を通して室内に取り入れる外気と、排気側配管８を通して室内から排気する空気との間で、第１熱交換部９によって熱交換を行う際に、この外気と地熱との間で以下のようにして熱交換を行う。
すなわち、熱媒体が分岐経路６を通って循環し、この循環する熱媒体と前記供給側配管７を通る空気（外気）との間で、第２熱交換部１０によって熱交換を行うことによって、外気と地熱との間で熱媒体を介して熱交換を行う。地熱は１年を通じてほぼ１５℃前後で一定であるので、暖期においては前記室内に供給側配管７を通って取り入れる外気の温度が熱交換によって下降し、冷期においては室内に供給側配管７を通って取り入れる外気が熱交換によって上昇するので、室内に取り入れる外気と室内の空気との温度差を小さくでき、よって、室内の空気を所望の温度に保持するために冷暖房装置が消費するエネルギー（電力等）を地熱を利用して抑えることができる。 According to the first aspect of the present invention, the first heat exchanging unit 9 between the outside air taken into the room through the supply side pipe 7 of the heat exchange ventilator 4 and the air exhausted from the room through the exhaust side pipe 8. When heat exchange is performed, heat exchange is performed between the outside air and geothermal heat as follows.
That is, the heat medium circulates through the branch path 6, and heat exchange is performed by the second heat exchange unit 10 between the circulated heat medium and the air (outside air) passing through the supply side pipe 7, Heat exchange is performed between the outside air and geothermal heat through a heat medium. Since the geothermal heat is constant at about 15 ° C. throughout the year, the temperature of the outside air taken into the room through the supply side pipe 7 during the warm period decreases due to heat exchange, and during the cold period, the supply side pipe 7 Since the outside air taken in through the air rises due to heat exchange, the temperature difference between the outside air taken into the room and the room air can be reduced, and thus the energy consumed by the air conditioning unit to maintain the room air at a desired temperature ( Power) can be suppressed using geothermal heat.

また、例えば図２に示すように、暖期に切替バルブ５を操作して分岐経路６に熱媒体が通らないようにしておくことによって、熱媒体は室内に設けられた熱放出部２と地中熱交換部１との間で循環する。したがって、１５℃程度の地熱を熱放出部２から放出して、室内の温度を下降できるので、室内の空気を所望の温度に保持するために冷房装置が消費するエネルギー（電力）を抑えることができる。
また、切替バルブ５を操作して分岐経路６と循環経路３との双方に熱媒体が通るようにしておくことによって、地熱を熱放出部２から放出するとともに、循環する熱媒体と前記供給側配管７を通る空気（外気）との間で、第２熱交換部１０によって熱交換を行うことによって、外気と地熱との間で熱媒体を介して熱交換を行って、室内に取り入れる外気の温度が下降する。したがって、室内の空気を所望の温度に保持するために冷房装置が消費するエネルギー（電力）を抑えることができる。
地熱は１年を通じてほぼ１５℃前後で一定であるので、冷期に地熱と室内の空気との間で熱交換を行うと、室内を例えば２０℃前後に暖房している場合は室内の温度が下降する恐れがある。そこで、図３に示すように、冷期に切替バルブ５を操作して熱媒体が熱放出部２に向けて循環経路３を通らないようにしておくことによって、分岐経路６を循環する熱媒体と前記供給側配管７を通る空気（外気）との間で、第２熱交換部１０によって熱交換を行うことによって、外気と地熱との間で熱媒体を介して熱交換を行って、室内に取り入れる外気の温度が上昇する。したがって、室内の空気を所望の温度に保持するために冷房装置が消費するエネルギー（電力）を抑えることができる。 Further , for example, as shown in FIG. 2, by operating the switching valve 5 in the warm period so that the heat medium does not pass through the branch path 6, the heat medium is separated from the heat release section 2 provided in the room and the ground. It circulates between the intermediate heat exchanger 1. Therefore, since geothermal heat of about 15 ° C. can be released from the heat release unit 2 and the indoor temperature can be lowered, energy (electric power) consumed by the cooling device to keep the indoor air at a desired temperature can be suppressed. it can.
Further, by operating the switching valve 5 so that the heat medium passes through both the branch path 6 and the circulation path 3, geothermal heat is released from the heat release unit 2 and the circulating heat medium and the supply side By exchanging heat with the air (outside air) passing through the pipe 7 by the second heat exchanging unit 10, heat exchange is performed between the outside air and the geothermal heat via a heat medium, and the outside air to be taken into the room The temperature falls. Therefore, the energy (electric power) consumed by the cooling device to keep the indoor air at a desired temperature can be suppressed.
Since geothermal heat is constant at around 15 ° C throughout the year, if heat is exchanged between geothermal heat and room air during the cold season, the room temperature will increase if the room is heated to around 20 ° C, for example. There is a risk of falling. Therefore, as shown in FIG. 3, by operating the switching valve 5 in the cold season so that the heat medium does not pass through the circulation path 3 toward the heat release unit 2, the heat medium that circulates in the branch path 6. Heat exchange is performed between the outside air and the geothermal heat by performing heat exchange between the air and the air (outside air) passing through the supply side pipe 7 by the second heat exchanging unit 10. The temperature of the outside air taken in increases. Therefore, the energy (electric power) consumed by the cooling device to keep the indoor air at a desired temperature can be suppressed.

本発明によれば、室内に取り入れる外気と室内から排気する空気との間で第１熱交換部によって熱交換を行う際に、この外気と地熱との間で第２熱交換部によって熱交換を行うことによって、室内に取り入れる外気と室内の空気との温度差を小さくでき、よって、室内の空気を所望の温度に保持するために冷暖房装置が消費するエネルギー（電力等）を地熱を利用して抑えることができる。 According to the present invention, when heat exchange is performed between the outside air taken into the room and the air exhausted from the room by the first heat exchange unit, heat exchange is performed between the outside air and the geothermal heat by the second heat exchange unit. By doing so, the temperature difference between the outside air taken into the room and the room air can be reduced, so that the energy (electric power, etc.) consumed by the air-conditioning unit to keep the room air at a desired temperature using geothermal heat Can be suppressed.

以下、図面を参照して本発明の実施の形態について説明する。
図１は、本発明に係る地熱利用空調装置の概略構成を示すものである。この地熱利用空調装置は、地中に埋設された地中熱交換部１と、室内設けられた熱放出部２と、この熱放出部２と前記地中熱交換部１とを接続して、該地中熱交換部１と前記熱放出部２との間で熱媒体を循環させる循環経路３と、熱交換換気装置４とを備えて概略構成されている。 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. This geothermal air-conditioning apparatus connects the underground heat exchange part 1 buried in the ground, the heat release part 2 provided indoors, the heat release part 2 and the underground heat exchange part 1, It is schematically configured to include a circulation path 3 for circulating a heat medium between the underground heat exchange unit 1 and the heat release unit 2 and a heat exchange ventilator 4.

地中熱交換部１は、熱伝導性や耐蝕性、防錆性等に優れた材料、例えばステンレス鋼で形成された円筒状のものであり、その内部には熱媒体としての水が充填されている。また、この地中熱交換部１は、上下に１０ｍ程度の長さを有しており、その埋設深さは、１年を通して地熱温度が１５℃程度という一定温度になる深さ、例えば５〜１０ｍ程度の深さに埋設されている。さらに、地中熱交換部１は、本実施の形態では２本平行離間して埋設されている。なお、地中熱交換部１は必要に応じて３本以上でもよく、また１本でもよい。
そして、この地中熱交換部１，１では、内部の水と地熱とが熱交換されて、該水が約１５℃程度に保持されるようになっている。 The underground heat exchanging section 1 is a cylindrical material formed of a material excellent in thermal conductivity, corrosion resistance, rust prevention, etc., for example, stainless steel, and the inside is filled with water as a heat medium. ing. The underground heat exchanging section 1 has a length of about 10 m above and below, and the embedment depth is a depth at which the geothermal temperature reaches a constant temperature of about 15 ° C. throughout the year, for example, 5 to 5 m. It is buried at a depth of about 10m. Further, in the present embodiment, two underground heat exchanging sections 1 are embedded in parallel with each other. In addition, the number of underground heat exchange parts 1 may be three or more as needed, and may be one.
And in this underground heat exchanging part 1,1, heat | fever exchange of internal water and geothermal heat is carried out, and this water is hold | maintained at about 15 degreeC.

熱放熱部２は、本実施の形態では輻射パネル２であり、建物の室内に設置されている。輻射パネル２はその内部に熱媒体としての水を流す細長いパイプが蛇行して配置されたものであり、表面から輻射熱を放出できるようになっている。このような輻射パネル２は例えば室内の壁や天井に設置されている。   The heat radiation unit 2 is a radiation panel 2 in the present embodiment, and is installed in a room of a building. The radiant panel 2 has a long and narrow pipe that circulates water as a heat medium in a meandering manner, and can radiate radiant heat from the surface. Such a radiation panel 2 is installed on an indoor wall or ceiling, for example.

循環経路３は、熱放出部２と地中熱交換部１とを接続して、該地中熱交換部１と熱放出部２との間で熱媒体を循環させるものであり、地中熱交換部１，１の水放出口に接続された第１供給経路３ａ，３ａと、この供給経路３ａ，３ａに切替バルブ５を介して接続されて、輻射パネル２に熱媒体としての水を供給する第２供給経路３ｂと、輻射パネル２から水を地中熱交換部１，１に戻す帰還経路３ｃとを備えており、帰還経路３ｃは２つに分岐して地中熱交換部１，１の水取込口に接続されている。
また、前記切替バルブ５には分岐経路６が接続されており、この分岐経路６は再び循環経路３の帰還経路３ｃに接続されている。
上記のような循環経路３や分岐経路６は断熱対策が講じられたパイプによって構成されている。また、前記一方の第１供給経路３ａには、他方の第１供給経路３ａが接続されており、一方の第１供給経路３ａの途中には、水給送用のポンプＰが接続されている。 The circulation path 3 connects the heat release part 2 and the underground heat exchange part 1 and circulates the heat medium between the underground heat exchange part 1 and the heat release part 2. The first supply paths 3a, 3a connected to the water discharge ports of the exchange units 1, 1 are connected to the supply paths 3a, 3a via the switching valve 5 to supply water as a heat medium to the radiation panel 2. And a return path 3c for returning water from the radiant panel 2 to the underground heat exchanging units 1 and 1, and the return path 3c is branched into two, and the underground heat exchanging unit 1 and 1 is connected to the water intake.
Further, a branch path 6 is connected to the switching valve 5, and this branch path 6 is again connected to the feedback path 3 c of the circulation path 3.
The circulation path 3 and the branch path 6 as described above are constituted by pipes that are provided with measures against heat insulation. The other first supply path 3a is connected to the one first supply path 3a, and a water feed pump P is connected to the middle of the first supply path 3a. .

前記熱交換換気装置４は、外気の取り入れと室内空気の排出とを行うとともに、取り入れる外気と排出する空気とで熱交換を行うようにした装置であり、外気を室内に取り入れる供給側配管７と、室内の空気を屋外に排気する排気側配管８と、供給側配管７を通る空気と排気側配管８を通る空気との間で熱交換を行う第１熱交換部９と、前記分岐経路６を通る熱媒体としての水と供給側配管７を通る空気（外気）との間で熱交換を行う第２熱交換部１０とを備えている。
供給側配管７は建物の外部の空気を室内に取り入れるために建物の外部から換気ユニット本体１１に連通する外部吸入配管７ａと、この外部吸入配管７ａから吸入された空気を換気ユニット本体１１を介して建物の同一フロアの室内に供給する室内供給配管７ｂとを備えており、室内供給配管７ｂの先端部は前記室内の天井に設けられた図示しない給気グリル等に接続され、この給気グリル等から新鮮な外気（空気）を室内に供給するようになっている。
排気側配管８は、換気ユニット本体１１に設けられた室内吸入口１１ａから吸入された室内の空気を外部に排気するために換気ユニット本体１１から外部まで連通するようにして設けられている。 The heat exchange ventilator 4 is a device that takes in outside air and discharges indoor air, and also performs heat exchange between the outside air to be taken in and the air to be discharged, and a supply side pipe 7 that takes in outside air into the room, A first heat exchanging unit 9 for exchanging heat between the exhaust side pipe 8 for exhausting indoor air to the outdoors, the air passing through the supply side pipe 7 and the air passing through the exhaust side pipe 8, and the branch path 6 And a second heat exchanging unit 10 that exchanges heat between water as a heat medium passing through and air (outside air) passing through the supply side pipe 7.
The supply side pipe 7 has an external suction pipe 7 a communicating with the ventilation unit main body 11 from the outside of the building in order to take air outside the building into the room, and the air sucked from the external suction pipe 7 a through the ventilation unit main body 11. And an indoor supply pipe 7b for supplying air to the room on the same floor of the building. The front end of the indoor supply pipe 7b is connected to an air supply grill (not shown) provided on the ceiling of the room. Etc., fresh outside air (air) is supplied into the room.
The exhaust side pipe 8 is provided so as to communicate from the ventilation unit main body 11 to the outside in order to exhaust the indoor air sucked from the indoor suction port 11a provided in the ventilation unit main body 11 to the outside.

また、換気ユニット本体１１内には、前記第１熱交換部９が設けられている。この第１熱交換部９は、室内側に位置する室内吸入口１１ａから吸入されて外排気側配管８から室外に排出される空気と、室外側に位置する外部吸入配管７ａから吸入されて室内供給配管７ｂから室内に供給される空気との間で、熱交換をするもの、つまり、室外に排出される空気と室内に供給される空気とで内部の空気を直接、混合させることなく、熱の移動のみを行うことができるものである。具体的には、熱伝導率が大きな金属や樹脂等からなるストロー状の極細薄肉円筒管を多数、配列したものである。そして、室外に排出される空気と室内に供給される空気とのいずれか一方をストロー状の円筒管の内部を通過させ、他方をその円筒管の周囲を通過させるような構造のものである。これにより、室外に排出される空気と、室内に供給される空気とで温度差がある場合に温度が高い方の熱が薄肉円筒管を介して温度が低い方に伝わるように形成されている。
前記第２熱交換部１０は、外部吸入配管７ａの外周部に設けられており、この第２熱交換部１０に前記分岐経路６の途中が接続されている。第２熱交換部１０は、例えば第１熱交換部と同様の構成となっている。つまり、分岐経路６を流れる熱媒体としての水と室内に供給される空気とのいずれか一方をストロー状の円筒管の内部を通過させ、他方をその円筒管の周囲を通過させるような構造のものである。これにより、分岐経路６を流れる１５℃程度の水と室内に供給される空気とで温度差がある場合に温度が高い方の熱が薄肉円筒管を介して温度が低い方に伝わるように形成されている。 Further, the first heat exchange unit 9 is provided in the ventilation unit main body 11. The first heat exchanging section 9 is sucked from the indoor suction port 11a located on the indoor side and exhausted to the outside from the outer exhaust side pipe 8, and is sucked from the external suction pipe 7a located on the outdoor side and taken indoors. Heat exchange is performed between the supply pipe 7b and the air supplied to the room, that is, the air discharged outside the room and the air supplied to the room are not directly mixed with the air. Can only be moved. Specifically, a large number of straw-like ultrathin cylindrical tubes made of metal, resin or the like having a high thermal conductivity are arranged. And either one of the air discharged | emitted outside or the air supplied indoors is made to pass through the inside of a straw-shaped cylindrical tube, and the other is made to pass the circumference | surroundings of the cylindrical tube. Thereby, when there is a temperature difference between the air discharged to the outside and the air supplied to the room, the heat having the higher temperature is transmitted to the lower temperature through the thin cylindrical tube. .
The second heat exchange unit 10 is provided on the outer periphery of the external suction pipe 7a, and the second heat exchange unit 10 is connected to the middle of the branch path 6. The second heat exchange unit 10 has the same configuration as the first heat exchange unit, for example. That is, the structure is such that either water as the heat medium flowing through the branch path 6 or air supplied to the room passes through the inside of the straw-shaped cylindrical tube and the other passes through the periphery of the cylindrical tube. Is. As a result, when there is a temperature difference between the water of about 15 ° C. flowing through the branch path 6 and the air supplied to the room, the heat having the higher temperature is transferred to the lower temperature through the thin cylindrical tube. Has been.

次に、上記構成の地熱利用空調装置によって空調を行う方法について図１〜図３を参照して説明する。
図２は暖期における地熱利用空調装置の状態を示している。まず、切替バルブ５を操作して分岐経路６に熱媒体としての水が通らないようにしておく。そして、ポンプＰを作動すると、水が循環経路３を通って輻射パネル２と地中熱交換部１，１との間で循環する。すなわち、地中熱交換部１，１に充填されている水が第１供給経路３ａ，３ａ、切替バルブ５、第２供給経路３ｂを通って輻射パネル２に供給される。この水の温度は約１５℃程度であるので、輻射パネル２から冷熱が輻射されて部屋の温度が下がる。これに伴って水の温度は上昇する。そして、この水が帰還経路３ｃを通って再び地中熱交換部１，１に戻される。地熱は１年を通してほぼ１５℃前後で一定であるので、地中熱交換部１，１に戻された水は地熱との熱交換によって１５℃程度に冷却されてこの温度に保持される。そして、熱媒体としての水を上記のようにして輻射パネル２と地中熱交換部１，１との間で循環させることによって、輻射パネル２から連続的に１５℃程度の冷熱を輻射して、部屋の空気を冷却する。したがって、室内の空気を所望の温度に保持するために冷房装置が消費するエネルギー（電力）を抑えることができる。 Next, a method of performing air conditioning by the geothermal air conditioning apparatus having the above configuration will be described with reference to FIGS.
FIG. 2 shows the state of the geothermal air conditioner in the warm season. First, the switching valve 5 is operated so that water as a heat medium does not pass through the branch path 6. When the pump P is operated, water circulates between the radiation panel 2 and the underground heat exchange units 1 and 1 through the circulation path 3. That is, the water filled in the underground heat exchange units 1 and 1 is supplied to the radiation panel 2 through the first supply paths 3a and 3a, the switching valve 5 and the second supply path 3b. Since the temperature of this water is about 15 ° C., cold heat is radiated from the radiation panel 2 and the temperature of the room is lowered. Along with this, the temperature of water rises. And this water returns to the underground heat exchange parts 1 and 1 again through the return path 3c. Since the geothermal heat is constant at around 15 ° C. throughout the year, the water returned to the underground heat exchanging units 1 and 1 is cooled to about 15 ° C. by heat exchange with the geothermal heat and maintained at this temperature. Then, water as a heat medium is circulated between the radiation panel 2 and the underground heat exchanging units 1 and 1 as described above to continuously radiate cold at about 15 ° C. from the radiation panel 2. Cool the room air. Therefore, the energy (electric power) consumed by the cooling device to keep the indoor air at a desired temperature can be suppressed.

また、前記熱交換換気装置４では、供給側配管７を通して室内に取り入れる外気と、排気側配管８を通して室内から排気する空気との間で、第１熱交換部９によって熱交換を行っているが、前記循環経路３を通る熱媒体としての水の一部を第２熱交換部１０に導いてもよい。この場合、前記切替バルブ５を操作して、水の一部を分岐経路３を通して第２熱交換部１０に導く。そして、この水と供給側配管７を通る空気（外気）との間で、第２熱交換部１０によって熱交換を行うことによって、外気と地熱との間で水を介して熱交換を行う。すると、室内に供給側配管４を通って取り入れる外気の温度が熱交換によって下降するので、室内に取り入れる外気と室内の空気との温度差を小さくでき、よって、室内の空気を所望の温度に保持するために冷暖房装置が消費するエネルギー（電力等）を地熱を利用して抑えることができる。   In the heat exchange ventilator 4, heat exchange is performed by the first heat exchange unit 9 between the outside air taken into the room through the supply side pipe 7 and the air exhausted from the room through the exhaust side pipe 8. A part of water as a heat medium passing through the circulation path 3 may be guided to the second heat exchange unit 10. In this case, the switching valve 5 is operated to guide part of the water to the second heat exchange unit 10 through the branch path 3. Then, heat exchange is performed between the outside air and the geothermal heat through water by performing heat exchange between the water and air (outside air) passing through the supply side pipe 7 by the second heat exchange unit 10. Then, the temperature of the outside air taken into the room through the supply side pipe 4 is lowered by heat exchange, so that the temperature difference between the outside air taken into the room and the room air can be reduced, and thus the room air is kept at a desired temperature. Therefore, the energy (electric power etc.) consumed by the air conditioner can be suppressed using geothermal heat.

図３は冷期における地熱利用空調装置の状態を示している。
上述したように、地熱は１年を通じてほぼ１５℃前後で一定であるので、冷期に地熱と室内の空気との間で熱交換を行うと、つまり輻射パネル２を利用すると暖房している室内の温度が下降する恐れがある。
そこで、冷期では切替バルブ５を操作して熱媒体としての水が熱放出部２に向けて循環経路３の第２循環経路３ｂを通らないようにしておく。そして、ポンプＰを作動すると、水が循環経路３の第１供給経路３ａ、切替バルブ５、分岐経路６を通って、第２熱交換部１０と地中熱交換部１，１との間で循環する。分岐経路６から第２熱交換部１０に送り込まれる水の温度は約１５℃程度であるので、この水と供給側配管７を通る空気（外気（例えば冷期は０℃〜５℃程度）との間で、第２熱交換部１０によって熱交換を行うことによって、外気と地熱との間で水を介して熱交換を行って、室内に取り入れる外気の温度が上昇する。したがって、室内に取り入れる外気と室内の空気との温度差を小さくでき、よって、室内の空気を所望の温度に保持するために暖房装置が消費するエネルギー（電力等）を地熱を利用して抑えることができる。 FIG. 3 shows a state of the geothermal air conditioner in the cold season.
As described above, geothermal heat is constant at around 15 ° C. throughout the year, so that when heat is exchanged between geothermal heat and indoor air in the cold season, that is, when the radiant panel 2 is used, the room is heated. There is a risk that the temperature of the will drop.
Therefore, in the cold season, the switching valve 5 is operated so that water as a heat medium does not pass through the second circulation path 3 b of the circulation path 3 toward the heat release unit 2. When the pump P is activated, water passes between the second heat exchange section 10 and the underground heat exchange sections 1 and 1 through the first supply path 3a of the circulation path 3, the switching valve 5 and the branch path 6. Circulate. Since the temperature of the water sent to the 2nd heat exchange part 10 from the branch path 6 is about 15 degreeC, this water and the air (for example, about 0 degreeC-5 degreeC in the cold season) passing through the supply side piping 7 The heat exchange is performed by the second heat exchange unit 10 between the outside air and the geothermal heat through the water, and the temperature of the outside air taken into the room rises. The temperature difference between the outside air and the room air can be reduced, so that the energy (such as electric power) consumed by the heating device to keep the room air at a desired temperature can be suppressed using geothermal heat.

また、冷期に部屋の温度が例えば１０℃以下の低温となっている場合は、前記輻射パネル２を利用してもよい。この場合、切替バルブ５を操作して水の一部を第２供給経路３ｂに流すようにすると、この水が輻射パネル２に供給される。この水の温度は約１５℃程度であるので、輻射パネル２から１５℃程度の熱が輻射されて部屋の温度が上昇する。そして、部屋の温度が１５℃程度になったら、輻射パネル２の利用を停止する。その後は、暖房装置と熱交換管換気装置４によって部屋の空調を行う。   Further, when the room temperature is a low temperature of, for example, 10 ° C. or less in the cold season, the radiation panel 2 may be used. In this case, when the switching valve 5 is operated so that a part of the water flows through the second supply path 3b, the water is supplied to the radiation panel 2. Since the temperature of this water is about 15 ° C., heat of about 15 ° C. is radiated from the radiation panel 2 and the temperature of the room rises. When the room temperature reaches about 15 ° C., the use of the radiation panel 2 is stopped. Thereafter, the room is air-conditioned by the heating device and the heat exchange tube ventilation device 4.

本発明に係る地熱利用空調装置の一例を示すもので、その概略構成図である。An example of the geothermal utilization air-conditioning apparatus which concerns on this invention is shown, and it is the schematic block diagram. 同、暖期における状態を示す概略構成図である。It is a schematic block diagram which shows the state in a warm season equally. 同、冷期における状態を示す概略構成図である。It is a schematic block diagram which shows the state in a cold season.

符号の説明Explanation of symbols

１ 地中熱交換部
２ 輻射パネル（熱放出部）
３ 循環経路
４ 熱交換換気装置
５ 切替バルブ
６ 分岐経路
７ 供給側配管
８ 排気側配管
９ 第１熱交換部
１０ 第２熱交換部 1 Ground heat exchange part 2 Radiant panel (heat release part)
DESCRIPTION OF SYMBOLS 3 Circulation path 4 Heat exchange ventilator 5 Switching valve 6 Branch path 7 Supply side piping 8 Exhaust side piping 9 1st heat exchange part 10 2nd heat exchange part

Claims (1)

地中に埋設された地中熱交換部と、この地中熱交換部と室内との間で熱媒体を循環させる循環経路と、前記室内に設けられかつ前記循環経路の途中が接続された熱放熱部と、熱交換換気装置とを備え、
前記熱交換換気装置は、外気を室内に取り入れる供給側配管と、室内の空気を屋外に排気する排気側配管と、供給側配管を通る空気と排気側配管を通る空気との間で熱交換を行う第１熱交換部と、
前記循環経路から分岐して再び該循環経路に至る分岐経路の途中に接続され、この分岐経路を通る熱媒体と前記供給側配管を通る空気との間で熱交換を行う第２熱交換部とを備え、
前記循環経路と分岐経路との分岐部には、切替バルブが設けられていることを特徴とする地熱利用空調装置。 A ground heat exchange section buried in the ground, a circulation path for circulating a heat medium between the underground heat exchange section and the room, and heat that is provided in the room and connected in the middle of the circulation path It has a heat radiating part and a heat exchange ventilator,
The heat exchange ventilator exchanges heat between a supply side pipe for taking outside air into a room, an exhaust side pipe for exhausting indoor air to the outdoors, and air passing through the supply side pipe and air passing through the exhaust side pipe. A first heat exchange section to perform;
A second heat exchanging unit that is connected in the middle of a branch path that branches from the circulation path and reaches the circulation path again, and performs heat exchange between the heat medium passing through the branch path and the air passing through the supply-side piping; With
A geothermal air conditioner characterized in that a switching valve is provided at a branch portion between the circulation path and the branch path .
JP2006000398A 2006-01-05 2006-01-05 Geothermal air conditioner Expired - Fee Related JP4806260B2 (en)

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JPS56138636A (en) * 1980-03-31 1981-10-29 Matsushita Seiko Co Ltd Heat exchanging type ventilating device
JPS6454152A (en) * 1987-08-25 1989-03-01 Sapporo Alna Co Ltd Ventilating device for building
JP2001140370A (en) * 1999-11-17 2001-05-22 Daikyo Home Inc Ventilating structure of house
JP2003343884A (en) * 2002-05-29 2003-12-03 Nobuyuki Tomoyasu Circulating type cooling and heating method of building using geothermal power
JP4376023B2 (en) * 2003-09-22 2009-12-02 旭化成ホームズ株式会社 Heat utilization equipment for air conditioning
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