JP6062498B1 - Temperature control equipment for agricultural facilities - Google Patents

Temperature control equipment for agricultural facilities Download PDF

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JP6062498B1
JP6062498B1 JP2015130914A JP2015130914A JP6062498B1 JP 6062498 B1 JP6062498 B1 JP 6062498B1 JP 2015130914 A JP2015130914 A JP 2015130914A JP 2015130914 A JP2015130914 A JP 2015130914A JP 6062498 B1 JP6062498 B1 JP 6062498B1
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side circuit
heat exchanger
radiator
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高杉　真司
真司 高杉
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ジオシステム株式会社
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    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
    • Y02P60/14—Measures for saving energy, e.g. in green houses

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Abstract

【課題】日光により温められたハウス内の熱を地中内に一時的に蓄熱し、状況に応じて地中に蓄えた熱をハウス内に戻すことにより、効率的に熱エネルギーを利用することができる農業栽培施設の温度調節装置を提供する。【解決手段】蓄熱用の第１循環路６とは別に、蓄熱層４に蓄熱された熱をハウス２内に戻す第２循環路８を備え、熱源側回路８１と利用側回路８４との間に中間回路８２（ヒートポンプユニット）を設け、地中熱とヒートポンプユニットとを組み合わせたハイブリッド熱源を用いて農業栽培施設の温度調節する。【選択図】図１[PROBLEMS] To efficiently use heat energy by temporarily storing heat in a house warmed by sunlight into the ground and returning the heat stored in the ground to the house depending on the situation. A temperature control device for an agricultural cultivation facility that can be used. In addition to the first circulation path 6 for heat storage, a second circulation path 8 for returning the heat stored in the heat storage layer 4 into the house 2 is provided. Is provided with an intermediate circuit 82 (heat pump unit), and the temperature of the agricultural cultivation facility is adjusted using a hybrid heat source in which underground heat and a heat pump unit are combined. [Selection] Figure 1

Description

本発明は、農業栽培施設の温度調節装置に関し、さらに詳しく言えば、昼間にハウス内で温められた熱を地中に蓄熱し、夜間に蓄熱した熱を用いてハウス内を温める地中熱熱交換装置に関する。   The present invention relates to a temperature control device for an agricultural cultivation facility, and more specifically, heat stored in the house in the daytime is stored in the ground, and the heat in the house is heated using the heat stored in the nighttime. It relates to an exchange device.

農業用ハウスは、栽培する農作物に応じてハウス内の温度を一定に保つ必要があるため、冷暖房機器を使ってハウス内を調温している。しかしながら、冷暖房機器には主に電力や火力を用いるため、その運用コストが嵩む。   The agricultural house needs to keep the temperature in the house constant according to the crop to be cultivated, so the temperature in the house is adjusted using air conditioning equipment. However, since electric power and thermal power are mainly used for air-conditioning equipment, the operation cost increases.

そこで、近年では年間を通して安定した地中熱を利用してハウス内を温める地中熱熱交換装置が注目されている。その一例として、例えば特許文献１には、ハウス内の空気を取り込む吸気用パイプと、空気を吐き出す排気用パイプと、地中に埋設される熱交換パイプとを備え、吸気パイプから取り込んだ空気を、熱交換パイプにて地中熱と熱交換したのち、排気パイプからハウス内に排気するようになっている。   Therefore, in recent years, a geothermal heat exchange device that warms the house using stable geothermal heat throughout the year has attracted attention. As an example, for example, Patent Document 1 includes an intake pipe that takes in air in a house, an exhaust pipe that discharges air, and a heat exchange pipe that is buried in the ground. After exchanging heat with underground heat in the heat exchange pipe, the exhaust pipe is exhausted into the house.

これによれば、送風ファンの電力のみで地中熱により調温された一定温度の空気をハウス内に吹き出すことができ、常に安定した室内温度を得ることができる。しかしながら、特許文献１に記載の方法では、室温を地中熱温度よりも高くすることはできず、さらに温度を高くしたい場合には、暖房機器を必要とする。   According to this, it is possible to blow out the air having a constant temperature adjusted by the underground heat only by the electric power of the blower fan into the house, and always obtain a stable indoor temperature. However, in the method described in Patent Document 1, the room temperature cannot be made higher than the underground heat temperature, and when it is desired to further increase the temperature, a heating device is required.

他方において、農業用のハウスは、日中の日照時間が短い冬場であっても、天候がよいとハウス内の気温が３０℃を越えることがあり、ハウス内の温度が上がり過ぎた場合には、窓を開けて熱を外に逃がしている。したがって、昼間は、温められたハウス内の空気を外に捨てており、逆に、夜間は暖房機器を用いてハウス内の温度を上げているため、熱効率が悪い。
On the other hand, if the house is used for agriculture, even in winter when the daylight hours are short, the temperature inside the house may exceed 30 ° C if the weather is good, and the house temperature is too high. , Open the window and let the heat out. Therefore, the heated air in the house is thrown out during the daytime, and conversely, since the temperature in the house is raised using the heating device at night, the heat efficiency is poor.

特開２００５−９４４８６号公報JP 2005-94486 A

そこで、本発明の課題は、ハウス内で太陽光で温められた熱を地中内に一時的に蓄えたのち、その蓄えた熱を必要に応じてハウス内に戻すことにより、より効率的に熱エネルギーを利用することができる農業栽培施設の温度調節装置を提供することにある。   Therefore, the problem of the present invention is that the heat heated by sunlight in the house is temporarily stored in the ground, and then the stored heat is returned to the house as needed, thereby more efficiently. It is providing the temperature control apparatus of the agricultural cultivation facility which can utilize a thermal energy.

上述した課題を解決するため、本発明は、採光部を有する農業用のハウス内に配置される放熱器と熱源とを含み、上記ハウス内の温度が所定の設定温度以下になった場合に、上記熱源が有する熱を上記放熱器より上記ハウス内に放熱する農業栽培施設の温度調節装置において、
上記ハウス内に配置される採熱器と、地中に掘削された地中熱熱交換井と、上記地中熱熱交換井内に配置される主熱交換器と、上記採熱器と上記主熱交換器との間で所定の熱媒体を循環させる第１循環路と、上記放熱器と上記主熱交換器との間で所定の熱媒体を循環させる第２循環路とを備え、上記採熱器には、熱媒体流入側の第１端管と熱媒体流出側の第２端管との間に可撓性を有する複数本のパイプを並列的に接続してなる面状熱交換器が用いられ、上記第２循環路は、上記主熱交換器を含む熱源側回路と、上記放熱器を含む利用側回路と、上記熱源側回路と上記利用側回路とを熱的に接続する中間回路とを備え、上記利用側回路には、上記採熱器および開閉弁を含む分岐回路が上記放熱器に対して並列に接続されており、上記開閉弁の開時に上記採熱器に熱媒体が供給され、上記採熱器より上記利用側回路内の熱媒体が有する熱が上記ハウス内に放熱されることを特徴としている。
In order to solve the above-described problem, the present invention includes a radiator and a heat source arranged in an agricultural house having a daylighting unit, and when the temperature in the house is equal to or lower than a predetermined set temperature, In the temperature control device of an agricultural cultivation facility that radiates the heat of the heat source from the radiator to the house,
A heat collector disposed in the house, a geothermal heat exchange well excavated in the ground, a main heat exchanger disposed in the geothermal heat exchange well, the heat collector and the main heat exchanger It includes a first circulation path for circulating a predetermined heat medium between the heat exchanger and a second circulation path for circulating a predetermined heat medium between the radiator and the main heat exchanger, the adoption The heat exchanger has a planar heat exchanger in which a plurality of flexible pipes are connected in parallel between a first end pipe on the heat medium inflow side and a second end pipe on the heat medium outflow side. And the second circulation path includes a heat source side circuit including the main heat exchanger, a use side circuit including the radiator, and an intermediate for thermally connecting the heat source side circuit and the use side circuit. A branch circuit including the heat collector and the on-off valve is connected in parallel to the radiator, and the use-side circuit includes: Sometimes the heat medium is supplied to the Tonetsu device, heat of the heat medium of the use side in the circuit than the Tonetsu device is characterized in that heat is radiated into the house.

本発明において好ましくは、上記中間回路として、上記熱源側回路に対して凝縮器として作用する第１副熱交換器、上記利用側回路に対して蒸発器として作用する第２副熱交換器および冷媒圧縮機を含むヒートポンプユニットが用いられる。Preferably, in the present invention, as the intermediate circuit, a first sub heat exchanger that acts as a condenser for the heat source side circuit, a second sub heat exchanger that acts as an evaporator for the use side circuit, and a refrigerant A heat pump unit including a compressor is used.

本発明によれば、昼間に日光で温められたハウス内の熱を地中の蓄熱層に蓄熱し、ハウス内が冷える夜間に地中に蓄熱された熱をハウス内に還元することにより、より安価なコストでハウス内を温めることができる。さらには、ヒートポンプユニットを利用してハイブリッドで加熱することにより、より効率的に加熱することができる。   According to the present invention, the heat in the house warmed by sunlight in the daytime is stored in the heat storage layer in the ground, and the heat stored in the ground at night when the house cools down is reduced in the house. The house can be warmed at a low cost. Furthermore, it can heat more efficiently by heating with a hybrid using a heat pump unit.

本発明の一実施形態に係る農業栽培施設の温度調節装置の構成を示す模式図。The schematic diagram which shows the structure of the temperature control apparatus of the agricultural cultivation facility which concerns on one Embodiment of this invention. 上記地中熱熱交換装置の採熱器の構造を模式的に示した模式図。The schematic diagram which showed typically the structure of the heat collecting device of the said underground heat exchanger. （ａ）上記採熱器を農業用ハウスの側壁に沿って配置した状態の模式図，（ｂ）上記採熱器を高設栽培用の台座の脚部に沿って配置した状態の模式図。(A) The schematic diagram of the state which has arrange | positioned the said heat collector along the side wall of the agricultural house, (b) The schematic diagram of the state which has arrange | positioned the said heat collector along the leg part of the base for elevated cultivation. 昼間の蓄熱運転時の動きを示す模式図。The schematic diagram which shows the movement at the time of the heat storage driving | operation of daytime. 夜間の放熱運転時の動きを示す模式図。The schematic diagram which shows the movement at the time of night heat radiation driving | operation.

次に、本発明の実施形態について、図１〜図５を参照して説明するが、本発明はこれに限定されない。   Next, although embodiment of this invention is described with reference to FIGS. 1-5, this invention is not limited to this.

図１に示すように、本発明の温度調節装置１は、農業用ハウス２（以下、単にハウス２とする）内に設置される採熱器３と、地中内に設けられた蓄熱層内４に埋設される第１熱交換器５（主熱交換器）と、第１採熱器３と第１熱交換器５との間で所定の熱媒体を循環させる第１循環路６と、温度調節装置１の運転を制御する制御部１０とを備えている。
As shown in FIG. 1, the temperature regulating device 1 of the present invention, agricultural houses 2 (hereinafter, simply referred to as House 2) and Tonetsu device 3 is installed in, thermal storage layer which is provided in the ground A first heat exchanger 5 (main heat exchanger) embedded in the inside 4, and a first circulation path 6 for circulating a predetermined heat medium between the first heat collector 3 and the first heat exchanger 5, And a control unit 10 that controls the operation of the temperature control device 1.

この実施形態において、ハウス２は、図３に示すように、金属パイプ製の支柱フレーム２１をアーチ状に折り曲げ、所定の間隔をもって地面に垂直となるように差し込んだのち、ビニールシート２２を被せることにより直方ドーム状に形成されている。ハウス２２には、ハウス２内の温度を計測する室温センサ２３が設置されている。   In this embodiment, the house 2, as shown in FIG. 3, bends a metal pipe column frame 21 into an arch shape, inserts it so as to be perpendicular to the ground at a predetermined interval, and then covers the vinyl sheet 22. Is formed in a rectangular dome shape. The house 22 is provided with a room temperature sensor 23 for measuring the temperature in the house 2.

この実施形態において、ハウス２は、いわゆるビニールハウスであるが、例えば樹脂パネルや木造などの家屋状であってもよく、屋内栽培型農業ハウスであれば、ビニールハウス以外の態様も本発明に含まれる。   In this embodiment, the house 2 is a so-called plastic house, but may be a house shape such as a resin panel or a wooden structure. For example, an aspect other than the plastic house is also included in the present invention as long as it is an indoor cultivated agricultural house. It is.

図２を併せて参照して、採熱器３は、熱媒体流入側の第１端管３１と熱媒体流出側の第２端管３２との間に、可撓性を有する複数本のポリエチレン製の細パイプ３３を並列的に接続してなる面状熱交換器（カーペット状熱交換器）からなる。   Referring also to FIG. 2, the heat collector 3 includes a plurality of polyethylene having flexibility between the first end pipe 31 on the heat medium inflow side and the second end pipe 32 on the heat medium outflow side. It consists of a planar heat exchanger (carpet-like heat exchanger) formed by connecting thin pipes 33 made in parallel.

この実施形態において、採熱器３には、パイプ３３をシート状に束ねておくための梁部３４が設けられている。この種のカーペット状熱交換器の一例としては、ダイカポリマー社製の商品名「Ｇ−カーペット」が好適に用いられるが、これ以外であってもよい。   In this embodiment, the heat collector 3 is provided with a beam portion 34 for bundling the pipes 33 in a sheet shape. As an example of this type of carpet-like heat exchanger, trade name “G-carpet” manufactured by Daika Polymer Co., Ltd. is preferably used, but other than this may be used.

図３（ａ）を参照して、採熱器３は、ハウス２の側壁２２１に沿って縦置き状に立て掛けられている。採熱器３を立て掛けるに当たっては、図示しない支柱を地面からほぼ立てておき、そこに固定紐などを用いて、採熱器３を括り付けることで取り付けられる。   With reference to FIG. 3A, the heat collector 3 is stood in a vertically placed manner along the side wall 221 of the house 2. When leaning the heat collector 3, a post (not shown) is almost stood from the ground, and the heat collector 3 is attached thereto by using a fixed string or the like.

また別の方法として、ハウス２内に設けられた畝２４と畝２４の間に支柱を立てて、そこに採熱器３を立設してもよい。このように採熱器３は、畝２４に対して日光の照射を遮るような場所でなければ、その設置位置は任意に設定可能である。   As another method, a support column may be set up between the eaves 24 and 24 provided in the house 2, and the heat collector 3 may be erect there. Thus, if the heat collector 3 is not a place that blocks the irradiation of sunlight with respect to the eaves 24, its installation position can be arbitrarily set.

さらに別の態様としては、図３（ｂ）に示すように、このハウス２には、高設栽培用の台座２５が設置されており、台座２５の脚部２５１に沿って採熱器３が立て掛けられている。これによれば、農作物への日光を遮ることなく、熱を効率的に回収することができる。   As another aspect, as shown in FIG. 3 (b), a pedestal 25 for elevated cultivation is installed in the house 2, and the heat collector 3 is disposed along the legs 251 of the pedestal 25. It is leaned against. According to this, heat can be efficiently recovered without blocking the sunlight on the crops.

蓄熱層４は、地表面Ｇから所定の深さに掘削された掘削穴であって、その内部には、砕石や砂利、目砂などの充填材４１が充填されている。蓄熱層４の形状や深さなどは、仕様に応じて任意に変更されてよい。また、蓄熱層４の設置場所は、省スペースの観点からハウス２の下に設置することが好ましいが、ハウス２の外の地下に設けてもよい。   The heat storage layer 4 is an excavation hole excavated to a predetermined depth from the ground surface G, and the inside thereof is filled with a filler 41 such as crushed stone, gravel, or sand. The shape, depth, and the like of the heat storage layer 4 may be arbitrarily changed according to specifications. Moreover, although the installation place of the heat storage layer 4 is preferably installed under the house 2 from the viewpoint of space saving, it may be provided in the basement outside the house 2.

さらには、また、充填材４１は、蓄熱層４の蓄熱効率を高める蓄熱材として砂などが充填されているが、例えば水などを満たしてもよく、充填材４１の仕様についても、蓄熱層４の蓄熱能力や使用する第１熱交換器５の仕様に応じて任意に変更されてよい。   Furthermore, although the filler 41 is filled with sand or the like as a heat storage material that enhances the heat storage efficiency of the heat storage layer 4, for example, it may be filled with water or the like. The heat storage capacity of the first heat exchanger 5 and the specifications of the first heat exchanger 5 to be used may be arbitrarily changed.

第１循環路６は、採熱器３と第１熱交換器５とを直列で接続する第１循環パイプ６１と、第１循環パイプ６１内を流れる熱媒体を一方向に向かって循環させる第１循環ポンプ６２と、第１循環路６を開閉する第１開閉弁６３と、第１循環路６内を流れる熱媒体の温度を測定する第１温度センサ６４とを備えている。   The first circulation path 6 is a first circulation pipe 61 that connects the heat collector 3 and the first heat exchanger 5 in series, and a first circulation path that circulates the heat medium flowing in the first circulation pipe 61 in one direction. 1 circulation pump 62, the 1st on-off valve 63 which opens and closes the 1st circulation path 6, and the 1st temperature sensor 64 which measures the temperature of the heat medium which flows through the inside of the 1st circulation path 6 are provided.

ハウス２内にはさらに、採熱器３とは別に放熱器７が設置されている。放熱器７は、いわゆるラジエターであって、内部に図示しないラジエターファンを備えている。放熱器７も制御部１０によって制御される。
A heat radiator 7 is further installed in the house 2 separately from the heat collector 3. The radiator 7 is a so-called radiator, and includes a radiator fan (not shown) inside. The radiator 7 is also controlled by the control unit 10.

放熱器７は、第１循環路６とは別に第１熱交換器５との間で所定の熱媒体を循環させる第２循環路８に接続されている。この実施形態において、第１循環路６および第２循環路８内を流れる熱媒体としては、水に不凍液（プロピレングリコールなど）を混ぜた循環液が用いられるが、熱媒体は液体であれば種類は選ばない。   The radiator 7 is connected to the second circulation path 8 that circulates a predetermined heat medium between the first heat exchanger 5 and the first circulation path 6. In this embodiment, as the heat medium flowing in the first circulation path 6 and the second circulation path 8, a circulation liquid in which an antifreeze liquid (such as propylene glycol) is mixed with water is used. Is not chosen.

第２循環路８は、第１熱交換器５を含む熱源側回路としての熱源側回路８１と、放熱器７を含む利用側回路８４と、熱源側回路８１と利用側回路８４とを熱的に接続する中間回路８２とを備えている。   The second circulation path 8 thermally connects the heat source side circuit 81 as the heat source side circuit including the first heat exchanger 5, the use side circuit 84 including the radiator 7, the heat source side circuit 81 and the use side circuit 84. And an intermediate circuit 82 connected thereto.

熱源側回路８１は、第１熱交換器５と放熱器７とに接続される閉ループ回路であって、その一部には、第２循環ポンプ８１１と第２開閉弁８１２と、熱源側回路８１内を流れる熱媒の温度を計測する第２温度センサ８１３とが設けられている。第２循環ポンプ８１１、第２開閉弁８１２も制御部１０によって運転が制御される。
The heat source side circuit 81 is a closed loop circuit connected to the first heat exchanger 5 and the radiator 7, and includes a second circulation pump 811, a second on-off valve 812, and a heat source side circuit 81. A second temperature sensor 813 for measuring the temperature of the heat medium flowing inside is provided. Second circulation pump 811, driven by the second on-off valve 812 also controls unit 10 is controlled.

中間回路８２は、熱源側回路８１に対して凝縮器として作用する第１副熱交換器８３と、利用側回路８４に対して蒸発器として作用する第２副熱交換器８５と、冷媒圧縮機８２１とを含むヒートポンプユニットからなる。   The intermediate circuit 82 includes a first sub heat exchanger 83 that acts as a condenser for the heat source side circuit 81, a second sub heat exchanger 85 that acts as an evaporator for the use side circuit 84, and a refrigerant compressor. 821 and a heat pump unit.

中間回路８２は、冷媒ガスが流れる閉ループ回路８２４にコンプレッサ８２１を備えた冷凍サイクル回路であって、低温の熱源（この例では地中熱）から熱を吸収して、高温の熱源を加熱するヒートポンプユニットである。中間回路８２には、第３温度センサ８２３が設けられている。コンプレッサ８２１も制御部１０によって運転が制御される。
The intermediate circuit 82 is a refrigeration cycle circuit provided with a compressor 821 in a closed loop circuit 824 through which refrigerant gas flows, and a heat pump that absorbs heat from a low-temperature heat source (in this example, underground heat) and heats the high-temperature heat source Is a unit. The intermediate circuit 82 is provided with a third temperature sensor 823. Compressor 821 also operation is controlled by the control unit 10.

この実施形態において、中間回路８２は、熱源側回路８１を流れる熱媒体と中間回路８２内を流れる熱媒体とを第１副熱交換器８３で熱交換したのち、冷凍サイクルによって加熱し、第２副熱交換器８５でさらに熱交換するが、ヒートポンプユニットに代えて電気式や石油燃焼式の加熱装置が用いられてもよい。   In this embodiment, the intermediate circuit 82 exchanges heat between the heat medium flowing in the heat source side circuit 81 and the heat medium flowing in the intermediate circuit 82 by the first sub heat exchanger 83, and then heats the second medium by the refrigeration cycle. Although the heat exchange is further performed by the auxiliary heat exchanger 85, an electric or oil combustion type heating device may be used instead of the heat pump unit.

この実施形態において、第１熱交換器５は、１台の第１熱交換器５に第１循環パイプ６１と熱源側回路８１の両方が接続されているが、第１熱交換器５を２台用意し、一方を第１循環パイプ６１に接続し、他方を熱源側回路８１に接続し、両方を蓄熱層４に埋設してもよい。   In this embodiment, the first heat exchanger 5 includes both the first circulation pipe 61 and the heat source side circuit 81 connected to one first heat exchanger 5. A stand may be prepared, one connected to the first circulation pipe 61, the other connected to the heat source side circuit 81, and both may be embedded in the heat storage layer 4.

利用側回路８４は、第２副熱交換器８５と放熱器７とを接続する閉ループ回路８４１を有し、閉ループ回路８４１には、第３ポンプ８４２と第３開閉弁８４３とを備えている。利用側回路８４にはさらに、放熱器７に対して採熱器３および第１開閉弁６３を含む分岐回路８４４が並列に接続されている。
The use side circuit 84 includes a closed loop circuit 841 that connects the second auxiliary heat exchanger 85 and the radiator 7 , and the closed loop circuit 841 includes a third pump 842 and a third on-off valve 843. Further, a branch circuit 844 including the heat collector 3 and the first opening / closing valve 63 is connected in parallel to the use side circuit 84.

これによれば、第１開閉弁６３を開とし、第３開閉弁８４３を閉として、第３ポンプ８４２を駆動することにより、採熱器３に利用側回路８４の熱媒体が供給され、採熱器３より利用側回路内の熱媒体が有する熱をハウス２内に放熱することもできる。
According to this, the first on-off valve 63 is opened, the third on-off valve 843 is closed, and the third pump 842 is driven, whereby the heat medium of the utilization side circuit 84 is supplied to the heat collecting device 3 and collected. The heat of the heat medium in the utilization side circuit from the heater 3 can be radiated into the house 2.

次に、図４を参照しながら、まず、昼間の蓄熱運転時における運転手順の一例を説明する。まず、制御部１０は、室温センサ２３を用いてハウス３内の温度（Ｔ１）を計測し、さらに第１温度センサ６４を用いて第１循環路６内を流れる熱媒体の温度（Ｔ２）を測定する。   Next, with reference to FIG. 4, first, an example of an operation procedure during daytime heat storage operation will be described. First, the control unit 10 measures the temperature (T1) in the house 3 using the room temperature sensor 23, and further uses the first temperature sensor 64 to determine the temperature (T2) of the heat medium flowing in the first circulation path 6. taking measurement.

次に、制御部１０は、室温センサ２３の測定値（Ｔ１）と第１温度センサ６４の測定値（Ｔ２）が所定の温度差以上（Ｔ１−Ｔ２≧Ｔａ、例えばＴａ＝５℃）であると判断した場合、まず、第２開閉弁８１２が「閉」、第２循環ポンプ８１１が「ＯＦＦ」であることを確認したのち、第１開閉弁６３を「開」、第１循環ポンプ６２を「ＯＮ」とする。
Next, the control unit 10 determines that the measured value (T1) of the room temperature sensor 23 and the measured value (T2) of the first temperature sensor 64 are equal to or greater than a predetermined temperature difference (T1−T2 ≧ Ta, for example, Ta = 5 ° C.). First, after confirming that the second on-off valve 812 is “closed” and the second circulation pump 811 is “OFF”, the first on-off valve 63 is “open” and the first circulation pump 62 is turned on. Set to “ON”.

これにより、熱媒体が、採熱器３→第１循環路６→第１熱交換器５→第１循環路６→採熱器３の順に一方向に流れることにより、ハウス２内の熱が採熱器３から第１熱交換器５に移動し、第１熱交換器５から蓄熱層４に蓄熱される。   As a result, the heat medium flows in one direction in the order of the heat collector 3 → the first circulation path 6 → the first heat exchanger 5 → the first circulation path 6 → the heat harvester 3, so that the heat in the house 2 is increased. It moves to the 1st heat exchanger 5 from the heat collecting device 3, and is stored in the heat storage layer 4 from the 1st heat exchanger 5.

制御部１０は、第１温度センサ２３の測定値（Ｔ１）と第１温度センサ６４の測定値（Ｔ２）が所定の温度範囲内であると判断した場合には、蓄熱層４への蓄熱が十分行われたと判断して、第１開閉弁６３を「閉」、第１循環ポンプ６２を「ＯＦＦ」として蓄熱運転を停止する。なお、制御部１０は、図示しないタイマーにより設定時間に応じて蓄熱運転を行ってもよい。
Control unit 10, when the measured value of the first temperature sensor 23 (T1) and the measured value of the first temperature sensor 6 4 (T2) is determined to be within a predetermined temperature range, the heat storage in the heat storage layer 4 Therefore, the first on-off valve 63 is closed and the first circulation pump 62 is turned off to stop the heat storage operation. In addition, the control part 10 may perform heat storage driving | operation according to setting time with the timer which is not shown in figure.

次に、制御部１０は、ハウス２内の温度が所定の設定温度まで冷えると、蓄熱した熱をハウス２内に戻す放熱運転が行われる。   Next, when the temperature in the house 2 cools to a predetermined set temperature, the control unit 10 performs a heat radiation operation for returning the stored heat into the house 2.

図５に示すように、制御部１０は、まず、第１開閉弁６３を「閉」、第１循環ポンプ６２を「ＯＦＦ」となっていることを確認したのち、室温センサ２３の測定値（Ｔ１）が所定の設定温度以下であると判断した場合には、第２開閉弁８１２を「開」、第２循環ポンプ８１１を「ＯＮ」、さらに第３ポンプ８４２を「ＯＮ」、第３開閉弁８４３を「開」とし、さらに放熱器７の図示しないラジエターファンをＯＮとする。
As shown in FIG. 5 , the control unit 10 first confirms that the first on-off valve 63 is “closed” and the first circulation pump 62 is “OFF”, and then the measured value of the room temperature sensor 23 ( When it is determined that T1) is equal to or lower than the predetermined set temperature, the second on-off valve 812 is “open”, the second circulation pump 811 is “ON”, the third pump 842 is “ON”, and the third on-off The valve 843 is set to “open”, and a radiator fan (not shown) of the radiator 7 is turned ON.

さらに制御部１０は、中間回路８２のコンプレッサー８２１を「ＯＮ」とし、第１副熱交換器８３で温められた冷媒をヒートポンプにより加熱したのち、第２副熱交換器８５にて利用側回路８４内を流れる熱媒体と熱交換する。これによれば、地中熱とヒートポンプによるハイブリッド運転により、地中熱を有効的に利用して、ハウス２内を暖房することができる。   Further, the control unit 10 sets the compressor 821 of the intermediate circuit 82 to “ON”, heats the refrigerant warmed by the first sub heat exchanger 83 by a heat pump, and then uses the second sub heat exchanger 85 to use the use side circuit 84. Heat exchange with the heat medium flowing inside. According to this, the inside of the house 2 can be heated by effectively using the underground heat by the hybrid operation using the underground heat and the heat pump.

これによれば、蓄熱層４で蓄熱された熱は、第１熱交換器５→熱源側回路８１→第１副熱交換器８３（凝縮器）→中間回路８２→第２副熱交換器８５（放熱器）→利用側回路８４→放熱器７の順路を経てハウス２内に戻される。   According to this, the heat stored in the heat storage layer 4 is converted into the first heat exchanger 5 → the heat source side circuit 81 → the first sub heat exchanger 83 (condenser) → the intermediate circuit 82 → the second sub heat exchanger 85. (Radiator) → use side circuit 84 → the radiator 7 is returned to the house 2 through a normal path.

また、第１開閉弁６３を「開」、第３開閉弁８４３を「閉」として、第３ポンプ８４２を「ＯＮ」すれば、採熱器３に利用側回路８４の熱媒体が供給され、採熱器３より利用側回路内の熱媒体が有する熱をハウス２内に放熱することもできる。

Further, when the first on-off valve 63 is “open”, the third on-off valve 843 is “closed”, and the third pump 842 is “ON”, the heat medium of the utilization side circuit 84 is supplied to the heat collector 3, The heat of the heat medium in the utilization side circuit can be radiated from the heat collector 3 into the house 2.

この実施形態において、蓄熱運転時は昼間行われ、放熱運転時は夜間に行う場合について例示したが、曇天や降雪時などの昼間でも気温が上がらない場合には、地中熱を用いた放熱運転を行ってもよい。   In this embodiment, the case where the heat storage operation is performed in the daytime and the heat dissipation operation is performed at night is exemplified, but if the temperature does not rise even in the daytime such as cloudy weather or snowfall, the heat radiation operation using the underground heat is performed. May be performed.

本発明によれば、昼間日光により温められたハウス内の熱を蓄熱層に蓄熱し、ハウス内が冷える夜間に地中に蓄熱された熱をハウス内に還元することにより、より安価なコストでハウス内を温めることができる。さらには、ヒートポンプユニットを利用してハイブリッドで加熱することにより、より効率的に加熱することができる。   According to the present invention, the heat in the house heated by daylight is stored in the heat storage layer, and the heat stored in the ground at night when the house cools down is returned to the house at a lower cost. The house can be warmed. Furthermore, it can heat more efficiently by heating with a hybrid using a heat pump unit.

１ 地中熱熱交換装置
２ 農業用ハウス
３ 採熱器
４ 蓄熱層
５ 第１熱交換器（主熱交換器）
６ 第１循環路
７ 放熱器
８ 第２循環路
８１ 熱源側回路
８２ 中間回路（ヒートポンプユニット）
８３ 第１副熱交換器
８４ 利用側回路
８５ 第２副熱交換器 DESCRIPTION OF SYMBOLS 1 Geothermal heat exchanger 2 Agricultural house 3 Heat collector 4 Thermal storage layer 5 1st heat exchanger (main heat exchanger)
6 First circulation path 7 Radiator 8 Second circulation path 81 Heat source side circuit 82 Intermediate circuit (heat pump unit)
83 1st sub heat exchanger 84 Use side circuit 85 2nd sub heat exchanger

Claims (2)

採光部を有する農業用のハウス内に配置される放熱器と熱源とを含み、上記ハウス内の温度が所定の設定温度以下になった場合に、上記熱源が有する熱を上記放熱器より上記ハウス内に放熱する農業栽培施設の温度調節装置において、
上記ハウス内に配置される採熱器と、地中に掘削された地中熱熱交換井と、上記地中熱熱交換井内に配置される主熱交換器と、上記採熱器と上記主熱交換器との間で所定の熱媒体を循環させる第１循環路と、上記放熱器と上記主熱交換器との間で所定の熱媒体を循環させる第２循環路とを備え、
上記採熱器には、熱媒体流入側の第１端管と熱媒体流出側の第２端管との間に可撓性を有する複数本のパイプを並列的に接続してなる面状熱交換器が用いられ、
上記第２循環路は、上記主熱交換器を含む熱源側回路と、上記放熱器を含む利用側回路と、上記熱源側回路と上記利用側回路とを熱的に接続する中間回路とを備え、上記利用側回路には、上記採熱器および開閉弁を含む分岐回路が上記放熱器に対して並列に接続されており、上記開閉弁の開時に上記採熱器に熱媒体が供給され、上記採熱器より上記利用側回路内の熱媒体が有する熱が上記ハウス内に放熱されることを特徴とする農業栽培施設の温度調節装置。 Including a radiator and a heat source disposed in an agricultural house having a daylighting unit, and when the temperature in the house is equal to or lower than a predetermined set temperature, the heat that the heat source has from the radiator In the temperature control device of agricultural cultivation facility that radiates heat inside,
A heat collector disposed in the house, a geothermal heat exchange well excavated in the ground, a main heat exchanger disposed in the geothermal heat exchange well, the heat collector and the main heat exchanger A first circulation path for circulating a predetermined heat medium between the heat exchanger and a second circulation path for circulating a predetermined heat medium between the radiator and the main heat exchanger;
In the heat collector, planar heat formed by connecting a plurality of flexible pipes in parallel between a first end pipe on the heat medium inflow side and a second end pipe on the heat medium outflow side. An exchanger is used,
The second circulation path includes a heat source side circuit including the main heat exchanger, a use side circuit including the heat radiator, and an intermediate circuit that thermally connects the heat source side circuit and the use side circuit. The branch circuit including the heat collector and the open / close valve is connected in parallel to the radiator, and a heat medium is supplied to the heat collector when the open / close valve is opened. A temperature control device for an agricultural cultivation facility, wherein heat of the heat medium in the use side circuit is radiated into the house from the heat collector. 上記中間回路として、上記熱源側回路に対して凝縮器として作用する第１副熱交換器、上記利用側回路に対して蒸発器として作用する第２副熱交換器および冷媒圧縮機を含むヒートポンプユニットが用いられることを特徴とする請求項１に記載の農業栽培施設の温度調節装置。 A heat pump unit including a first sub heat exchanger that acts as a condenser for the heat source side circuit, a second sub heat exchanger that acts as an evaporator for the use side circuit, and a refrigerant compressor as the intermediate circuit temperature regulating device for agricultural cultivation facilities according to claim 1, characterized in that it is used.
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