JP2020012084A - Latent heat storage material composition, and heater - Google Patents

Latent heat storage material composition, and heater Download PDF

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JP2020012084A
JP2020012084A JP2018136856A JP2018136856A JP2020012084A JP 2020012084 A JP2020012084 A JP 2020012084A JP 2018136856 A JP2018136856 A JP 2018136856A JP 2018136856 A JP2018136856 A JP 2018136856A JP 2020012084 A JP2020012084 A JP 2020012084A
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heat storage
storage material
latent heat
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洸平 中村
Kohei Nakamura
洸平 中村
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Toho Gas Co Ltd
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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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/40—Solar thermal energy, e.g. solar towers
    • 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
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/14—Thermal energy storage
    • 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
    • Y02E70/00—Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin

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Abstract

To provide a latent heat storage material composition capable of effectively storing heat even when heat storage is conducted by a heat source based on sunlight, and a heater for heating by using latent heat release of the latent heat storage material composition.SOLUTION: A latent heat storage material composition 1 is manufactured by blending a latent heat storage material 10 conducting heat storage or heat release and an admixture 20 for modifying state or physical property of the latent heat storage material 10. The latent heat storage material 10 is sodium acetate trihydrate, the admixture 20 is a coloring agent 21 having a dye generating coloration promoting absorption of sunlight as a first admixture, in which the coloring agent 21 is dispersed in a molten liquid of the sodium acetate trihydrate when the latent heat storage material composition 1 is at a liquid phase state, and the coloring agent 21 is dispersed between particles of the sodium acetate trihydrate and whole latent heat storage material composition 1 has coloration of black by the coloring agent 21 when the latent heat storage material composition 1 is at a solid state.SELECTED DRAWING: Figure 1

Description

本発明は、相変化に伴う潜熱の出入りを利用して、蓄熱またはその放熱を行う潜熱蓄熱材に、この潜熱蓄熱材の状態を調整する添加物を配合した潜熱蓄熱材組成物、及びこの潜熱蓄熱材組成物を用いた採暖用具に関する。詳しくは、例えば、自然災害に伴う避難所生活で使用される災害時用採暖用具や、主に屋外活動で使用されるアウトドア用採暖マット等に挙げられる採暖用具に関する。   The present invention provides a latent heat storage material composition in which an additive that adjusts the state of the latent heat storage material is added to a latent heat storage material that performs heat storage or heat release by utilizing the ingress and egress of latent heat accompanying a phase change, and a latent heat storage material. The present invention relates to a warming tool using a heat storage material composition. More specifically, the present invention relates to, for example, a warming-up tool used in evacuation shelter accompanying a natural disaster, and a warming-up tool mentioned in an outdoor warming mat used mainly in outdoor activities.

潜熱蓄熱材（PCM：Phase Change Material）は、相変化に伴う潜熱の出入りを利用して蓄熱することができる物性を有しており、外部から供給される熱をこの潜熱蓄熱材に蓄熱し、蓄えた熱を必要に応じて取り出すことで、エネルギが無駄なく有効に活用できる。その活用例の一つとして、太陽光を熱源に蓄熱する蓄熱材が、特許文献１に開示されている。   Latent heat storage material (PCM: Phase Change Material) has the property of being able to store heat using the ingress and egress of latent heat accompanying a phase change, and stores heat supplied from the outside in this latent heat storage material. By extracting the stored heat as needed, energy can be effectively used without waste. Patent Document 1 discloses a heat storage material that stores sunlight in a heat source as one of the utilization examples.

特許文献１は、蓄熱材を内包した包装材を、樹脂で成形された板厚の収納カバー内に、空気層を設けた状態で収容された蓄熱部材であり、収納カバーのうち、空気層の周りは透明であるが、配置された包装材の位置に対応する外表面側には、黒色の塗料膜が被覆されている。特許文献１では、黒色の塗料膜は、収納カバーを通じて、太陽光を吸収し易くする目的で設けられ、太陽光による熱の蓄熱材への熱伝導が促され、蓄熱材の蓄熱効率が高まるとされている。   Patent Literature 1 is a heat storage member in which a packaging material including a heat storage material is housed in a state in which an air layer is provided in a storage cover having a thickness formed of resin, and of the storage cover, Although the periphery is transparent, the outer surface side corresponding to the position of the arranged packaging material is covered with a black paint film. In Patent Literature 1, the black paint film is provided for the purpose of facilitating the absorption of sunlight through the storage cover, and heat conduction by the sunlight to the heat storage material is promoted, and the heat storage efficiency of the heat storage material increases. Have been.

実用新案登録第３１５９１５０号公報Utility Model Registration No. 3159150

しかしながら、特許文献１では、太陽光は、黒色の塗料膜に吸収されて、吸収された光は、収納カバー本体を加熱するものの、太陽光は、包装材を介して、この収納カバーの内面に接触した蓄熱材全体の表層部分のみに伝熱するだけで、内包されている蓄熱材全体の深部まで十分に伝熱していない虞がある。そのため、蓄熱材全体が融解して、十分な熱量になるまで潜熱を蓄えるのに必要な時間が、長くなってしまう問題があるほか、蓄熱材を太陽光に晒す時間が短い場合や、日射量が少ない条件下の場合には、蓄熱材全体の表層部分だけで、蓄えた潜熱が放熱されることになり、蓄熱材全体において、蓄熱・放熱性能が十分に活かされない問題があった。   However, in Patent Literature 1, although sunlight is absorbed by a black paint film and the absorbed light heats the storage cover main body, the sunlight is applied to the inner surface of the storage cover via a packaging material. There is a possibility that heat is transferred only to the surface layer of the entire heat storage material in contact with it, and the heat is not sufficiently transferred to the deep portion of the entire heat storage material contained therein. As a result, the time required to store the latent heat until the heat storage material as a whole melts and reaches a sufficient amount of heat increases, and in addition, the time required to expose the heat storage material to sunlight is short, When the condition is small, the stored latent heat is radiated only in the surface layer of the entire heat storage material, and there is a problem that the heat storage / radiation performance is not fully utilized in the entire heat storage material.

特に、例えば、自然災害に伴う避難所生活で使用される災害時用の採暖用具をはじめ、キャンプ等の屋外で使用されるアウトドア向けの採暖マット等で、蓄熱材から放つ熱が利用される製品では、特許文献１の技術は、蓄熱材において、蓄熱を完了するまでに長時間を要してしまうばかりか、内包した蓄熱材全体の表層部分だけからの放熱になっているため、暖に必要な熱を、より長い時間、供給し続けることができない。   In particular, for example, products that use heat released from heat storage materials, such as warming tools for disasters used in evacuation shelters following natural disasters, as well as outdoor warming mats used outdoors such as camps Then, the technique of Patent Document 1 requires not only a long time to complete the heat storage in the heat storage material, but also heat dissipation from only the surface layer portion of the entire heat storage material contained therein. Heat cannot be supplied for a longer time.

本発明は、上記問題点を解決するためになされたものであり、太陽光に基づく熱源で蓄熱を行う場合でも、熱を効率良く蓄えることができる潜熱蓄熱材組成物を提供することと、このような潜熱蓄熱材組成物の潜熱放熱を利用して暖を取るための採暖用具を提供することを目的とする。   The present invention has been made to solve the above problems, and even when performing heat storage with a heat source based on sunlight, to provide a latent heat storage material composition that can efficiently store heat, and It is an object of the present invention to provide a warming tool for taking warmth using the latent heat radiation of such a latent heat storage material composition.

上記目的を達成するために、本発明に係る潜熱蓄熱材組成物は、以下の構成を有する。
（１）相変化に伴う潜熱の出入りを利用して、蓄熱またはその放熱を行う潜熱蓄熱材に、該潜熱蓄熱材の状態または物性を調整する添加物を配合してなる潜熱蓄熱材組成物において、前記潜熱蓄熱材は、無機塩水和物であり、前記添加物は、第１の添加物として、太陽光の吸収を促す色に呈色する色素を有した着色剤であること、当該潜熱蓄熱材組成物が液相状態にある場合に、前記着色剤は、前記無機塩水和物の融液に分散され、当該潜熱蓄熱材組成物が固相状態にある場合には、前記着色剤は、前記無機塩水和物の粒子間に分散されて、当該潜熱蓄熱材組成物全体が、前記着色剤により前記色に呈色されていること、を特徴とする。
（２）（１）に記載する潜熱蓄熱材組成物において、前記着色剤は、炭素を主成分とした炭素色素であること、を特徴とする。
（３）（２）に記載する潜熱蓄熱材組成物において、当該潜熱蓄熱材組成物全体の重量に占める前記着色剤の配合比率は、０ｗｔ％より大きく、１ｗｔ％以下の範囲内であること、を特徴とする。
（４）（１）乃至（３）のいずれか１つに記載する潜熱蓄熱材組成物において、前記第１の添加物とは別の前記添加物で、第２の添加物として、当該潜熱蓄熱材組成物の融解温度を調整する融点調整剤が配合され、前記融点調整剤は、糖アルコール類に属する物質を少なくとも含んでおり、前記無機塩水和物との溶解により、負の溶解熱を発生する物性を有すること、を特徴とする。
（５）（４）に記載する潜熱蓄熱材組成物において、糖アルコール類に属する物質は、エリスリトール（Ｃ４Ｈ１０Ｏ４）、キシリトール（Ｃ５Ｈ１２Ｏ５）、またはマンニトール（Ｃ６Ｈ１４Ｏ６）のうち、少なくともいずれか一つを含むものであること、を特徴とする。
（６）（５）に記載する潜熱蓄熱材組成物において、糖アルコール類に属する物質は、エリスリトール（Ｃ４Ｈ１０Ｏ４）であること、を特徴とする。
（７）（１）乃至（６）のいずれか１つに記載する潜熱蓄熱材組成物において、前記第１の添加物とは別の前記添加物で、第３の添加物として、融液状態にある前記無機塩水和物に対し、結晶化の誘起を促す過冷却防止剤が配合されていること、または、金属片が加えられていること、を特徴とする。
（８）（７）に記載する潜熱蓄熱材組成物において、前記過冷却防止剤は、リン酸水素二ナトリウム（Ｎａ２ＨＰＯ４）であること、を特徴とする。
（９）（１）乃至（８）のいずれか１つに記載する潜熱蓄熱材組成物において、前記無機塩水和物は、酢酸塩または硫酸塩のいずれかを、少なくとも一方含んでなること、を特徴とする。
（１０）（９）に記載する潜熱蓄熱材組成物において、前記酢酸塩は、酢酸ナトリウム三水和物（ＣＨ３ＣＯＯＮａ・３Ｈ２Ｏ）であること、を特徴とする。
（１１）（９）または（１０）に記載する潜熱蓄熱材組成物において、当該潜熱蓄熱材組成物は、融解温度を３０〜５８℃の範囲内に調整した物性であること、を特徴とする。 In order to achieve the above object, a latent heat storage material composition according to the present invention has the following configuration.
(1) A latent heat storage material composition in which an additive for adjusting the state or physical properties of the latent heat storage material is blended with a latent heat storage material that performs heat storage or heat dissipation by utilizing the inflow and outflow of latent heat accompanying the phase change. The latent heat storage material is an inorganic salt hydrate, and the additive is, as a first additive, a colorant having a pigment that exhibits a color that promotes absorption of sunlight, When the material composition is in a liquid phase, the colorant is dispersed in a melt of the inorganic salt hydrate, and when the latent heat storage material composition is in a solid phase, the colorant is The latent heat storage material composition is dispersed between the particles of the inorganic salt hydrate, and the entirety of the latent heat storage material composition is colored in the color by the colorant.
(2) In the latent heat storage material composition described in (1), the colorant is a carbon pigment containing carbon as a main component.
(3) In the latent heat storage material composition described in (2), the blending ratio of the coloring agent in the total weight of the latent heat storage material composition is greater than 0 wt% and is within 1 wt% or less; It is characterized by.
(4) In the latent heat storage material composition according to any one of (1) to (3), the latent heat storage material is a second additive that is different from the first additive. A melting point adjusting agent for adjusting the melting temperature of the material composition is blended, and the melting point adjusting agent contains at least a substance belonging to sugar alcohols, and generates a negative heat of melting upon dissolution with the inorganic salt hydrate. Having the following physical properties:
(5) In the latent heat storage material composition described in (4), the substance belonging to sugar alcohols is erythritol (C 4 H 10 O 4 ), xylitol (C 5 H 12 O 5 ), or mannitol (C 6 H). 14 O 6 ).
(6) The latent heat storage material composition described in (5), wherein the substance belonging to the sugar alcohol is erythritol (C 4 H 10 O 4 ).
(7) The latent heat storage material composition according to any one of (1) to (6), wherein the additive is different from the first additive and is in a molten state as a third additive. Wherein the inorganic salt hydrate is mixed with a supercooling inhibitor which promotes the induction of crystallization, or a metal piece is added.
(8) The latent heat storage material composition described in (7), wherein the supercooling inhibitor is disodium hydrogen phosphate (Na 2 HPO 4 ).
(9) The latent heat storage material composition according to any one of (1) to (8), wherein the inorganic salt hydrate comprises at least one of an acetate and a sulfate. Features.
(10) In the latent heat storage material composition described in (9), the acetate is sodium acetate trihydrate (CH 3 COONa.3H 2 O).
(11) The latent heat storage material composition according to (9) or (10), wherein the latent heat storage material composition has physical properties in which a melting temperature is adjusted within a range of 30 to 58 ° C. .

また、上記目的を達成するために、本発明に係る採暖用具は、以下の構成を有する。
（１２）暖を取るための採暖用具において、マット状の袋体であるマット状容器と、相変化に伴う潜熱の出入りを利用して蓄熱または放熱を行う潜熱蓄熱材に、該潜熱蓄熱材の物性を調整する添加物を配合してなる潜熱蓄熱材組成物と、を有し、前記潜熱蓄熱材組成物は、前記マット状容器に設けられ、太陽光に基づく熱源、または当該潜熱蓄熱材組成物を融解温度以上に加熱可能な熱源によって蓄熱し、蓄えた潜熱の放熱により、前記マット状容器及びその周囲を暖めること、前記潜熱蓄熱材組成物は、（１）乃至（１１）のいずれか１つに記載する潜熱蓄熱材組成物であること、を特徴とする。 Moreover, in order to achieve the above object, a warming tool according to the present invention has the following configuration.
(12) In a warming device for taking warmth, the latent heat storage material is stored in a mat-shaped container, which is a mat-shaped bag, and a latent heat storage material that stores or dissipates heat by utilizing the ingress and egress of latent heat accompanying a phase change. A latent heat storage material composition containing an additive for adjusting physical properties, wherein the latent heat storage material composition is provided in the mat-like container, and is a heat source based on sunlight, or the latent heat storage material composition. The mat-shaped container and its surroundings are heated by radiating the stored latent heat by radiating the stored latent heat, and the latent heat storage material composition is any one of (1) to (11). It is a latent heat storage material composition described in any one of the above.

上記構成を有する本発明の潜熱蓄熱材組成物、及び採暖用具の作用・効果について説明する。
（１）相変化に伴う潜熱の出入りを利用して、蓄熱またはその放熱を行う潜熱蓄熱材に、該潜熱蓄熱材の状態または物性を調整する添加物を配合してなる潜熱蓄熱材組成物において、潜熱蓄熱材は、無機塩水和物であり、添加物は、第１の添加物として、太陽光の吸収を促す色に呈色する色素を有した着色剤であること、当該潜熱蓄熱材組成物が液相状態にある場合に、着色剤は、無機塩水和物の融液に分散され、当該潜熱蓄熱材組成物が固相状態にある場合には、着色剤は、無機塩水和物の粒子間に分散されて、当該潜熱蓄熱材組成物全体が、着色剤により前記色に呈色されていること、を特徴とする。 The operation and effect of the latent heat storage material composition of the present invention having the above-described configuration and the heating device will be described.
(1) A latent heat storage material composition in which an additive for adjusting the state or physical properties of the latent heat storage material is blended with a latent heat storage material that performs heat storage or heat dissipation by utilizing the inflow and outflow of latent heat accompanying the phase change. The latent heat storage material is an inorganic salt hydrate, and the additive is a colorant having a pigment that exhibits a color that promotes the absorption of sunlight as a first additive; When the substance is in the liquid phase, the colorant is dispersed in the melt of the inorganic salt hydrate, and when the latent heat storage material composition is in the solid state, the colorant is formed of the inorganic salt hydrate. The entirety of the latent heat storage material composition is dispersed between the particles and is colored in the color by a colorant.

この特徴により、着色剤で呈色された本発明の潜熱蓄熱材組成物では、太陽光からの吸光が促進されるため、本発明の潜熱蓄熱材組成物への吸光量が、着色剤を含有していない潜熱蓄熱材組成物の吸光量より多くなる。そのため、太陽光による熱が、本発明の潜熱蓄熱材組成物に効率良く吸収されて、本発明の潜熱蓄熱材組成物の吸熱量が、より多くなり、黒色に着色していない蓄熱材を収容する収納カバーだけに、黒色の塗料膜を施した特許文献１の技術に比べても、本発明の潜熱蓄熱材組成物の吸熱量は、より確実に多くなる。   Due to this feature, in the latent heat storage material composition of the present invention colored with a colorant, the absorption from sunlight is promoted, so that the amount of light absorbed by the latent heat storage material composition of the present invention contains the colorant. It becomes larger than the absorbance of the latent heat storage material composition that is not used. Therefore, heat from sunlight is efficiently absorbed by the latent heat storage material composition of the present invention, and the amount of heat absorbed by the latent heat storage material composition of the present invention is increased, and the heat storage material that is not colored black is accommodated. The amount of heat absorbed by the latent heat storage material composition of the present invention increases more reliably than in the technique of Patent Document 1 in which a black paint film is applied only to the storage cover to be used.

従って、本発明に係る潜熱蓄熱材組成物によれば、太陽光に基づく熱源で蓄熱を行う場合でも、熱を効率良く蓄えることができる、という優れた効果を奏する。   Therefore, the latent heat storage material composition according to the present invention has an excellent effect that heat can be efficiently stored even when heat is stored using a heat source based on sunlight.

（２）に記載する潜熱蓄熱材組成物において、着色剤は、炭素を主成分とした炭素色素であること、を特徴とする。この特徴により、着色剤の主成分である炭素は、伝熱性が比較的高い物性であるため、着色剤自体が、本発明の潜熱蓄熱材組成物において、蓄熱速度や放熱速度の向上に寄与する。 In the latent heat storage material composition described in (2), the colorant is a carbon pigment containing carbon as a main component. Due to this feature, carbon, which is the main component of the colorant, has relatively high heat transfer properties, so the colorant itself contributes to the improvement in heat storage rate and heat release rate in the latent heat storage material composition of the present invention. .

（３）に記載する潜熱蓄熱材組成物において、当該潜熱蓄熱材組成物全体の重量に占める着色剤の配合比率は、０ｗｔ％より大きく、１ｗｔ％以下の範囲内であること、を特徴とする。この特徴により、本発明の潜熱蓄熱材組成物全体を、着色剤の色素の色（例えば、黒色、黒色に限りなく似た茶褐色等の濃色）に一様に着色するのに、十分足り得る。また、このような配合比率で着色剤が配合されていれば、本発明の潜熱蓄熱材組成物における融解温度や蓄熱量に対し、阻害要因となる悪影響を、着色剤によって及ぼすこともない。 In the latent heat storage material composition described in (3), the blending ratio of the coloring agent in the total weight of the latent heat storage material composition is larger than 0 wt% and is in the range of 1 wt% or less. . This feature is sufficient to uniformly color the entire latent heat storage material composition of the present invention to the color of the coloring agent of the coloring agent (for example, dark color such as black or brownish brown which is not limited to black). . Further, if the coloring agent is blended in such a blending ratio, the coloring agent does not exert an adverse effect on the melting temperature or the amount of heat stored in the latent heat storage material composition of the present invention.

（４）に記載する潜熱蓄熱材組成物において、第１の添加物とは別の添加物で、第２の添加物として、当該潜熱蓄熱材組成物の融解温度を調整する融点調整剤が配合され、融点調整剤は、糖アルコール類に属する物質を少なくとも含んでおり、無機塩水和物との溶解により、負の溶解熱を発生する物性を有すること、を特徴とする。この特徴により、本発明の潜熱蓄熱材組成物の融解温度を調整できると共に、本発明の潜熱蓄熱材組成物の粘度が増大し、潜熱蓄熱材や着色剤との密度差に起因した潜熱蓄熱材と着色剤との分離や、過冷却防止剤等、他の添加物も含めて、本発明の潜熱蓄熱材組成物の構成成分同士の分離を防止することができる。そのため、本発明の潜熱蓄熱材組成物の構成成分間の不均一化が発生しないため、本発明の潜熱蓄熱材組成物は、化学的に安定した蓄熱材となり得る。 In the latent heat storage material composition described in (4), a melting point regulator for adjusting a melting temperature of the latent heat storage material composition is added as a second additive, which is different from the first additive. The melting point adjusting agent contains at least a substance belonging to sugar alcohols, and has a property of generating a negative heat of solution when dissolved with an inorganic salt hydrate. By this feature, the melting temperature of the latent heat storage material composition of the present invention can be adjusted, the viscosity of the latent heat storage material composition of the present invention increases, and the latent heat storage material caused by the density difference between the latent heat storage material and the coloring agent. Separation of the components of the latent heat storage material composition of the present invention can be prevented, including separation of the latent heat storage material composition from the coloring agent and other additives such as a supercooling inhibitor. Therefore, the latent heat storage material composition of the present invention can be a chemically stable heat storage material because non-uniformity between the components of the latent heat storage material composition of the present invention does not occur.

（５）に記載する潜熱蓄熱材組成物において、糖アルコール類に属する物質は、エリスリトール（Ｃ４Ｈ１０Ｏ４）、キシリトール（Ｃ５Ｈ１２Ｏ５）、またはマンニトール（Ｃ６Ｈ１４Ｏ６）のうち、少なくともいずれか一つを含むものであること、を特徴とする。また、（６）に記載する潜熱蓄熱材組成物において、糖アルコール類に属する物質は、エリスリトール（Ｃ４Ｈ１０Ｏ４）であること、を特徴とする。この特徴により、このような種の融点調整剤が潜熱蓄熱材に加わることで、潜熱蓄熱材の融点を大幅に調整できると共に、融点調整剤自体も蓄熱性能を具備しているため、融点調整剤が配合されても、例えば、約３５０ｋＪ／Ｌ等という、大きな蓄熱量を得ることができる。 In the latent heat storage material composition described in (5), the substance belonging to sugar alcohols is erythritol (C 4 H 10 O 4 ), xylitol (C 5 H 12 O 5 ), or mannitol (C 6 H 14 O 6). ) Includes at least one of them. Further, in the latent heat storage material composition described in (6), the substance belonging to sugar alcohols is erythritol (C 4 H 10 O 4 ). By this feature, by adding such kind of melting point adjusting agent to the latent heat storage material, the melting point of the latent heat storage material can be largely adjusted, and the melting point adjusting agent itself has heat storage performance. , A large amount of heat storage, for example, about 350 kJ / L can be obtained.

（７），（８）に記載する潜熱蓄熱材組成物において、第１の添加物と第２の添加物とは別の添加物で、第３の添加物として、例えば、リン酸水素二ナトリウム（Ｎａ２ＨＰＯ４）等に挙げられるような、融液状態にある無機塩水和物に対し、結晶化の誘起を促す過冷却防止剤が配合されていること、または、金属片が加えられていること、を特徴とする。この特徴により、本発明の潜熱蓄熱材組成物の主成分である潜熱蓄熱材が、例えば、酢酸ナトリウム三水和物等のように、過冷却現象が顕著に生じ易いとされる無機塩水和物であっても、過冷却現象の発現を防止、または解除することができる。 (7) In the latent heat storage material composition described in (8), the first additive and the second additive are different additives, and the third additive is, for example, disodium hydrogen phosphate (Na 2 HPO 4 ) or the like, a supercooling inhibitor that promotes the induction of crystallization is mixed with the inorganic salt hydrate in a molten state, or a metal piece is added. Be characterized. Due to this feature, the latent heat storage material, which is the main component of the latent heat storage material composition of the present invention, is an inorganic salt hydrate which is considered to have a remarkable supercooling phenomenon, such as sodium acetate trihydrate. However, the occurrence of the supercooling phenomenon can be prevented or canceled.

（９），（１０）に記載する潜熱蓄熱材組成物において、無機塩水和物は、例えば、酢酸ナトリウム三水和物（ＣＨ３ＣＯＯＮａ・３Ｈ２Ｏ）等の酢酸塩、または、例えば、硫酸ナトリウム十水和物（Ｎａ２ＳＯ４・１０Ｈ２Ｏ）等の硫酸塩のいずれかを、少なくとも一方含んでなること、を特徴とする。この特徴により、体積当たりの潜熱の蓄熱量について、一例とする酢酸ナトリウム三水和物単体での潜熱の蓄熱量は、４００ｋＪ／Ｌ近傍と、無機塩水和物系の潜熱蓄熱材の中でも、大きい。そのため、例示した酢酸ナトリウム三水和物を主成分とする本発明の潜熱蓄熱材組成物は、蓄熱できる潜熱の蓄熱量を、３００ｋＪ／Ｌ超えも可能になる程、大容量の熱を蓄えることができ、それを放熱する蓄放熱性能を具備することができるため、蓄熱材の物性として優れている。 In the latent heat storage material compositions described in (9) and (10), the inorganic salt hydrate is, for example, an acetate such as sodium acetate trihydrate (CH 3 COONa · 3H 2 O), or, for example, sulfuric acid. It is characterized by comprising at least one of sulfates such as sodium decahydrate (Na 2 SO 4 .10H 2 O). With this feature, the latent heat storage amount per unit volume of the latent heat per unit volume of sodium acetate trihydrate alone is about 400 kJ / L, which is the largest among the latent heat storage materials based on inorganic salt hydrate. . Therefore, the latent heat storage material composition of the present invention containing the exemplified sodium acetate trihydrate as a main component can store a large amount of heat so that the amount of latent heat that can be stored can exceed 300 kJ / L. The heat storage material has excellent heat storage and heat dissipation performance for radiating the heat.

（１１）に記載する潜熱蓄熱材組成物において、当該潜熱蓄熱材組成物は、融解温度を３０〜５８℃の範囲内に調整した物性であること、を特徴とする。この特徴により、例えば、自然災害に伴う避難所生活で使用される災害時用の採暖用具や、キャンプ等の屋外で使用されるアウトドア向けの採暖マット等の採暖用具で、本発明の潜熱蓄熱材組成物が用いられ、人が、本発明の潜熱蓄熱材組成物の放熱によって暖を取る場合に、採暖用具使用者の低温やけどを防ぎつつ、採暖用具を利用する寝床内等の特定場所やその周辺を、例えば、３０〜４０℃程の快適な温度に保つことができる。 The latent heat storage material composition described in (11) is characterized in that the latent heat storage material composition has physical properties whose melting temperature is adjusted within a range of 30 to 58 ° C. Due to this feature, for example, the heat storage device for disasters used in evacuation shelters following natural disasters, or a heating device such as a heating mat for outdoor use outdoors such as camping, the latent heat storage material of the present invention When the composition is used and a person warms up by radiating the heat of the latent heat storage material composition of the present invention, while preventing low-temperature burns of the user of the warming-up tool, a specific place such as in a bed using the heating-up tool and the like. The surrounding area can be maintained at a comfortable temperature of, for example, about 30 to 40 ° C.

（１２）暖を取るための採暖用具において、マット状の袋体であるマット状容器と、相変化に伴う潜熱の出入りを利用して蓄熱または放熱を行う潜熱蓄熱材に、該潜熱蓄熱材の物性を調整する添加物を配合してなる潜熱蓄熱材組成物と、を有し、潜熱蓄熱材組成物は、マット状容器に設けられ、太陽光に基づく熱源、または当該潜熱蓄熱材組成物を融解温度以上に加熱可能な熱源によって蓄熱し、蓄えた潜熱の放熱により、マット状容器及びその周囲を暖めること、潜熱蓄熱材組成物は、（１）乃至（１１）のいずれか１つに記載する潜熱蓄熱材組成物であること、を特徴とする。この特徴により、例えば、自然災害に伴い、避難先において、電力やガス等のエネルギを確保できない場合等に、仮設の寝床に本発明の採暖用具を使用すれば、主として太陽光等による熱源で潜熱蓄熱材組成物に蓄熱し、その潜熱蓄熱材組成物の放熱により、寝床自体やその周りを暖めることができるため、就寝時に避難先での寒さを解消することができる。また、本発明の採暖用具は、ホットカーペットや湯たんぽと同じような使い方で、避難先等で使用することができるため、本発明の採暖用具の周辺を含めて暖かくなり、避難先等での寒さは解消され得る。特に、本発明の採暖用具は、災害時において避難生活の場で使用する場合に、生活の質の向上に貢献することができる。 (12) In a warming device for taking warmth, the latent heat storage material is stored in a mat-shaped container, which is a mat-shaped bag, and a latent heat storage material that stores or dissipates heat by utilizing the ingress and egress of latent heat accompanying a phase change. A latent heat storage material composition containing an additive for adjusting physical properties, and the latent heat storage material composition is provided in a mat-shaped container, and a heat source based on sunlight, or the latent heat storage material composition. The method according to any one of (1) to (11), wherein heat is stored by a heat source that can be heated to a temperature equal to or higher than the melting temperature, and the mat-shaped container and its surroundings are heated by radiating the stored latent heat. A latent heat storage material composition. Due to this feature, for example, when energy such as electric power or gas cannot be secured at an evacuation site due to a natural disaster, if the heating device of the present invention is used for a temporary bed, latent heat is mainly generated by a heat source such as sunlight. Heat is stored in the heat storage material composition, and the bed itself and its surroundings can be warmed by the heat release of the latent heat storage material composition, so that the cold at the evacuation site at bedtime can be eliminated. In addition, since the warming device of the present invention can be used in an evacuation place or the like in the same manner as a hot carpet or a hot water bottle, it becomes warm including the vicinity of the warming device of the present invention, and becomes cold in an evacuation place and the like. Can be eliminated. In particular, the warming tool of the present invention can contribute to improving the quality of life when used in a place of evacuation life during a disaster.

実施形態に係る潜熱蓄熱材組成物の構成成分を示す模式図である。It is a schematic diagram which shows the component of the latent heat storage material composition which concerns on embodiment. 実施形態の潜熱蓄熱材組成物に含有した着色剤の効果を確認する実験で、着色剤有無別のサンプルを対比して観察した様子を示す模式図であり、（ａ）は、直射日光を浴びたサンプル上面の様子を示す平面図、（ｂ）は、（ａ）中、Ａ−Ａ矢視断面、Ｂ−Ｂ矢視断面を、それぞれ示す。It is a schematic diagram which shows the mode which observed the state which contrasted the sample by the presence or absence of a coloring agent in the experiment which confirms the effect of the coloring agent contained in the latent heat storage material composition of embodiment, and (a) is exposed to direct sunlight. FIG. 2B is a plan view showing the state of the sample upper surface, and FIG. 2B is a cross-sectional view taken along line AA and BB in FIG. 検証実験の結果を、蓄熱材温度と時間との関係で示したグラフである。It is the graph which showed the result of the verification experiment by the relationship between heat storage material temperature and time. 本実施形態の災害時用マットとその使い方を示す説明図である。It is explanatory drawing which shows the mat for disasters of this embodiment, and its usage.

以下、本発明に係る潜熱蓄熱材組成物、及び採暖用具について、実施形態を図面に基づいて詳細に説明する。本発明に係る採暖用具は、本実施形態では、自然災害に伴う避難所生活で使用される災害時用の採暖用具（災害時用マット）であり、本発明に係る潜熱蓄熱材組成物は、この災害時用マットに具備される蓄熱材である。   Hereinafter, embodiments of a latent heat storage material composition and a warming device according to the present invention will be described in detail with reference to the drawings. In the present embodiment, the warming device according to the present invention is a warming device for disaster (mat for disaster) used in shelter life accompanying a natural disaster, and the latent heat storage material composition according to the present invention includes: It is a heat storage material provided in this disaster mat.

はじめに、災害時用マットの仕様と使い方について、図４を用いて説明する。図４は、本実施形態の災害時用マットとその使い方を示す説明図である。図４に示すように、本実施形態の災害時用マット５０は、マット状の袋体であるマット状容器５１の袋内に、後述する潜熱蓄熱材組成物１を封入してなり、太陽光等による熱源に潜熱蓄熱材組成物１を晒して蓄熱し、潜熱蓄熱材組成物１からの放熱によって、マット状容器５１及びその周囲を暖めて、暖を取る採暖用具である。この災害時用マット５０は、折り畳み可能に構成され、図４に例示する災害時用の段ボールベッド５２等、災害時に避難所で設けられるベッドと同じサイズになっている。マット状容器５１は、表面が透明で太陽光を透過する樹脂材料によって、形成されている。   First, the specification and usage of the disaster mat will be described with reference to FIG. FIG. 4 is an explanatory diagram showing a disaster mat according to the present embodiment and how to use the mat. As shown in FIG. 4, the disaster mat 50 of the present embodiment is obtained by enclosing a latent heat storage material composition 1 described later in a bag of a mat-shaped container 51 which is a mat-shaped bag, and The latent heat storage material composition 1 is exposed to a heat source such as the above to store heat, and the heat from the latent heat storage material composition 1 is used to heat the mat-shaped container 51 and its surroundings to warm up. The disaster mat 50 is configured to be foldable and has the same size as a bed provided at an evacuation site at the time of disaster, such as a cardboard bed 52 at the time of disaster illustrated in FIG. The mat-shaped container 51 is formed of a resin material having a transparent surface and transmitting sunlight.

なお、図４に図示はされていないが、断熱材が、マット状容器５１の下面５１ｂに積層して配置されていると、潜熱蓄熱材組成物１から放つ熱が、マット状容器５１の下面５１ｂ側から放出するのを抑制することができる。そのため、暖を取りたいマット状容器５１の上面５１ａ側への放熱を、より効果的に行うことができる。   Although not shown in FIG. 4, if the heat insulating material is disposed on the lower surface 51 b of the mat-shaped container 51, the heat released from the latent heat storage material composition 1 will be applied to the lower surface of the mat-shaped container 51. Release from the 51b side can be suppressed. Therefore, heat can be more effectively dissipated to the upper surface 51a side of the mat-shaped container 51 for which warming is desired.

潜熱蓄熱材組成物１は、災害時用マット５０の使用者に低温やけどを起こさないよう、寝床となる災害時用マット５０周辺の温度を、概ね３０〜４０℃の範囲内で保つことを可能とした材料を選択して使用される。災害時用マット５０を構成する潜熱蓄熱材組成物１は、後に詳述する潜熱蓄熱材組成物１である。   The latent heat storage material composition 1 can keep the temperature around the disaster mat 50 serving as a bed within a range of approximately 30 to 40 ° C. so that the user of the disaster mat 50 does not suffer low-temperature burns. The selected material is used. The latent heat storage material composition 1 constituting the disaster mat 50 is a latent heat storage material composition 1 described in detail later.

次に、災害時用マット５０の使い方について説明する。災害時用マット５０は、暖を必要とする場合に使用される。使用にあたりまず、図４（ａ）に示すように、日中、屋外で、若しくは日当たりのよい屋内で、布団を天日干しするように、災害時用マット５０を直射日光に晒して、太陽光の熱を、災害時用マット５０内の潜熱蓄熱材組成物１に蓄熱する。蓄熱後、図４（ｂ）に示すように、災害時用マット５０を、段ボールベッド５２の上に載せる。   Next, how to use the disaster mat 50 will be described. The disaster mat 50 is used when warming is required. In use, first, as shown in FIG. 4A, the disaster mat 50 is exposed to direct sunlight so that the futon is dried in the sun during the day, outdoors, or in a sunny room. The heat is stored in the latent heat storage material composition 1 in the disaster mat 50. After the heat storage, the disaster mat 50 is placed on the cardboard bed 52 as shown in FIG.

具体的には、土台となる段ボールベッド５２の上に敷く板状の段ボール上に、災害時用マット５０を載置する場合や、この板状の段ボールとの間に、災害時用マット５０を挟み込む場合等である。次いで、図４（ｃ）に示すように、避難者は、災害時用マット５０の上に布団５３を敷いて寝る。これにより、日中の間に、潜熱蓄熱材組成物１に蓄熱された熱が、潜熱蓄熱材組成物１から放たれて、例えば、快適な寝床内温度とされる３４℃前後に、寝床内を暖めることができる。放熱後、潜熱蓄熱材組成物１が、前述したように、太陽光等の熱により、再び蓄熱されると、災害時用マット５０は、繰り返し使用することができる。   Specifically, when the disaster mat 50 is placed on a plate-shaped cardboard laid on a cardboard bed 52 serving as a base, or when the disaster mat 50 is placed between the cardboard and the plate-shaped cardboard. This is the case when the object is sandwiched. Next, as shown in FIG. 4 (c), the evacuees sleep on a futon 53 on the disaster mat 50. Thus, during the daytime, the heat stored in the latent heat storage material composition 1 is released from the latent heat storage material composition 1 to warm the bed, for example, to around 34 ° C., which is a comfortable bed temperature. be able to. After the heat is dissipated, as described above, when the latent heat storage material composition 1 stores heat again by heat such as sunlight, the disaster mat 50 can be used repeatedly.

次に、潜熱蓄熱材組成物について、詳述する。図１は、実施形態に係る潜熱蓄熱材組成物の構成成分を示す模式図である。図１に示すように、潜熱蓄熱材組成物１は、無機塩水和物である潜熱蓄熱材１０を主成分に、この潜熱蓄熱材１０の状態または物性を調整する添加物２０を、実施形態では３種（着色剤２１、融点調整剤２２、過冷却防止剤２３）配合してなり、融解温度３０〜５８℃に調整された物性である。潜熱蓄熱材１０は、酢酸塩、または硫酸塩の少なくともいずれかを含有した無機塩水和物であり、相変化に伴う潜熱の出入りを利用して、蓄熱またはその放熱を行う。   Next, the latent heat storage material composition will be described in detail. Drawing 1 is a mimetic diagram showing constituent components of a latent heat storage material constituent concerning an embodiment. As shown in FIG. 1, the latent heat storage material composition 1 has a latent heat storage material 10 which is an inorganic salt hydrate as a main component, and an additive 20 for adjusting the state or physical properties of the latent heat storage material 10. It has three physical properties (colorant 21, melting point regulator 22, and supercooling inhibitor 23), and has physical properties adjusted to a melting temperature of 30 to 58 ° C. The latent heat storage material 10 is an inorganic salt hydrate containing at least one of an acetate and a sulfate. The latent heat storage material 10 stores or radiates heat by utilizing the entrance and exit of latent heat accompanying a phase change.

３種の添加物２０のうち、第１の添加物は、太陽光の吸収を促す色（例えば、黒色、黒色に限りなく似た茶褐色等の濃色）に呈色する色素を有した着色剤２１である。また、着色剤２１とは別の添加物２０である第２の添加物は、当該潜熱蓄熱材組成物１の融解温度を調整する融点調整剤２２である。また、着色剤２１、融点調整剤２２とは別の添加物２０である第３の添加物は、融液状態にある無機塩水和物（潜熱蓄熱材１０）に対し、結晶化の誘起を促す過冷却防止剤２３である。潜熱蓄熱材組成物１が液相状態にある場合に、着色剤２１は、潜熱蓄熱材１０の融液に分散され、潜熱蓄熱材組成物１が固相状態にある場合には、着色剤２１は、潜熱蓄熱材１０の粒子間に分散されて、潜熱蓄熱材組成物１全体が、着色剤２１により黒色に呈色されている。   Among the three types of additives 20, the first additive is a colorant having a pigment that exhibits a color that promotes the absorption of sunlight (for example, black, or a dark color such as brownish brown similar to black). 21. Further, a second additive, which is an additive 20 different from the colorant 21, is a melting point regulator 22 for adjusting the melting temperature of the latent heat storage material composition 1. Further, the third additive, which is an additive 20 different from the coloring agent 21 and the melting point regulator 22, promotes the induction of crystallization of the inorganic salt hydrate (latent heat storage material 10) in a molten state. It is a supercooling inhibitor 23. When the latent heat storage material composition 1 is in the liquid phase, the colorant 21 is dispersed in the melt of the latent heat storage material 10, and when the latent heat storage material composition 1 is in the solid phase, the colorant 21 is dispersed. Are dispersed between the particles of the latent heat storage material 10, and the entire latent heat storage material composition 1 is colored black by the colorant 21.

具体的に説明する。潜熱蓄熱材１０は、実施形態では、酢酸塩の一種である酢酸ナトリウム三水和物（ＣＨ３ＣＯＯＮａ・３Ｈ２Ｏ）である。酢酸ナトリウム三水和物単体の物性は、水和数３、分子量［ｇ／ｍｏｌ］１３６．０８、融点約５８℃、融点より低い温度では、水に易溶な固体の物質である。 This will be specifically described. In the embodiment, the latent heat storage material 10 is sodium acetate trihydrate (CH 3 COONa · 3H 2 O), which is a kind of acetate. The physical properties of sodium acetate trihydrate alone are a hydrate number 3, a molecular weight [g / mol] of 136.08, a melting point of about 58 ° C., and a solid substance that is easily soluble in water at a temperature lower than the melting point.

なお、無機塩水和物からなる潜熱蓄熱材１０は、酢酸ナトリウム三水和物以外にも、例えば、硫酸塩の一種である硫酸ナトリウム十水和物（Ｎａ２ＳＯ４・１０Ｈ２Ｏ）とする第１の場合や、酢酸ナトリウム三水和物と硫酸ナトリウム十水和物との混合物とする第２の場合等、二種以上含む混合物、または混晶を主成分とした蓄熱材であっても良い。硫酸ナトリウム十水和物単体の物性は、水和数１０、分子量［ｇ／ｍｏｌ］３２２．２１、融点３２．３８℃、融点より低い温度では、水に可溶な固体の物質である。但し、第１の場合、硫酸ナトリウム十水和物単体の融点３２．３８℃が、所望とする潜熱蓄熱材組成物１の融解温度３０〜５８℃の下限付近であるため、潜熱蓄熱材組成物の使途が制限されることもある。 The latent heat storage material 10 composed of an inorganic salt hydrate is, for example, sodium sulfate decahydrate (Na 2 SO 4 .10H 2 O), which is a kind of sulfate, in addition to sodium acetate trihydrate. In the first case, the second case in which a mixture of sodium acetate trihydrate and sodium sulfate decahydrate is used, a mixture containing two or more kinds, or a heat storage material mainly containing a mixed crystal. good. The physical properties of sodium sulfate decahydrate alone are a solid substance soluble in water at a hydration number of 10, a molecular weight [g / mol] of 322.21, a melting point of 32.38 ° C., and a temperature lower than the melting point. However, in the first case, since the melting point of sodium sulfate decahydrate alone is 32.38 ° C., which is near the lower limit of the desired melting temperature of the latent heat storage material composition 1 of 30 to 58 ° C., the latent heat storage material composition In some cases, the use of is restricted.

着色剤２１は、炭素を主成分とした液体状の炭素色素で、潜熱蓄熱材１０（酢酸ナトリウム三水和物）をはじめ、後述する糖アルコール類の物質である融点調整剤２２や、過冷却防止剤２３と化学反応しない性状を有した物質である。また、この着色剤２１は、非危険物かつ無毒であり、安全性が高く、耐熱性にも優れ、直射日光に晒される使用環境下でも、劣化せず安定した状態で着色できる色素である。なお、着色剤２１は、本実施形態のような液体状の色素以外に、粉末状の色素でも良く、潜熱蓄熱材組成物１全体を着色できる色素であれば、その性状は特に限定されるものではない。   The coloring agent 21 is a liquid carbon pigment containing carbon as a main component. The coloring agent 21 includes a latent heat storage material 10 (sodium acetate trihydrate), a melting point regulator 22 which is a substance of a sugar alcohol described later, and a supercooling agent. It is a substance having the property of not chemically reacting with the inhibitor 23. The coloring agent 21 is a non-dangerous substance, non-toxic, highly safe, excellent in heat resistance, and can be colored in a stable state without deterioration even in a use environment exposed to direct sunlight. The colorant 21 may be a powdery dye other than the liquid dye as in the present embodiment, and its properties are not particularly limited as long as the dye can color the entire latent heat storage material composition 1. is not.

また、着色剤２１は、潜熱蓄熱材１０と異なり、蓄熱特性を具備していないため、１．０ｗｔ％以下の範囲内で添加されている。着色剤２１の添加量が、この範囲内であれば、着色剤２１を添加した潜熱蓄熱材組成物１は、同体積で比べても、潜熱蓄熱材１０単体の蓄熱量より大幅に低下するのを抑制できる。加えて、着色剤２１が、このような添加量で潜熱蓄熱材組成物１に配合されていれば、潜熱蓄熱材組成物１全体を、着色剤２１の色素の色である黒色に一様に着色するのに、十分足り得るからである。   Unlike the latent heat storage material 10, the colorant 21 does not have heat storage characteristics, and thus is added within a range of 1.0 wt% or less. When the amount of the colorant 21 added is within this range, the latent heat storage material composition 1 to which the colorant 21 is added is significantly lower than the heat storage amount of the latent heat storage material 10 alone even when compared with the same volume. Can be suppressed. In addition, if the colorant 21 is added to the latent heat storage material composition 1 in such an added amount, the entire latent heat storage material composition 1 is uniformly colored black, which is the color of the pigment of the colorant 21. This is because it is enough for coloring.

融点調整剤２２は、主として食品添加物に用いられている糖アルコール類に属する物質を少なくとも含み、潜熱蓄熱材１０との溶解により、負の溶解熱を発生する物性を有する物質である。糖アルコールは、アルドースやケトースのカルボニル基を還元して生成する糖の一種であり、水と溶解する。融点調整剤２２は、このような糖アルコール類に属するエリスリトール（Ｃ４Ｈ１０Ｏ４）、キシリトール（Ｃ５Ｈ１２Ｏ５）、またはマンニトール（Ｃ６Ｈ１４Ｏ６）のうち、少なくともいずれか一つを含むものであり、実施形態では、エリスリトールである。 The melting point modifier 22 is a substance having at least a substance belonging to sugar alcohols mainly used in food additives, and having a property of generating negative heat of dissolution by dissolution with the latent heat storage material 10. Sugar alcohol is a type of sugar generated by reducing the carbonyl group of aldose or ketose, and dissolves in water. The melting point regulator 22 is at least one of erythritol (C 4 H 10 O 4 ), xylitol (C 5 H 12 O 5 ), and mannitol (C 6 H 14 O 6 ) belonging to such sugar alcohols. In one embodiment, it is erythritol.

ここで、上述した「負の溶解熱を発生する物性を有する物質」の定義について、説明する。前述したように、潜熱蓄熱材組成物１は、酢酸ナトリウム三水和物からなる潜熱蓄熱材１０を主成分に、融点調整剤２２を配合してなる。融点調整剤２２が潜熱蓄熱材１０に溶解するとき、この融点調整剤２２において、外部から熱を吸収して吸熱反応が生じるものを、本実施形態に係る潜熱蓄熱材組成物１では、「負の溶解熱を発生する物性を有する物質」と定義している。   Here, the definition of the above-mentioned "substance having a property of generating heat of dissolution" will be described. As described above, the latent heat storage material composition 1 is composed of the latent heat storage material 10 made of sodium acetate trihydrate as a main component and the melting point regulator 22 blended therein. When the melting point adjusting agent 22 is dissolved in the latent heat storage material 10, the melting point adjusting agent 22 that absorbs heat from the outside and causes an endothermic reaction is referred to as “negative” in the latent heat storage material composition 1 according to the present embodiment. Substance having the property of generating heat of dissolution of

なお、「負の溶解熱を発生する物性を有する物質」には、先に例示したエリスリトールやキシリトール、マンニトールのほかに、例えば、ソルビトール（Ｃ６Ｈ１４Ｏ６）、ラクチトール（Ｃ１２Ｈ２４Ｏ１１）等の「糖アルコール類に属する物質」がある。また、塩化カルシウム六水和物（ＣａＣｌ２・６Ｈ２Ｏ）、塩化マグネシウム六水和物（ＭｇＣｌ２・６Ｈ２Ｏ）、塩化カリウム（ＫＣｌ）、塩化ナトリウム（ＮａＣｌ）等の「塩化物に属する物質」がある。また、上述の「糖アルコール類に属する物質」に該当する物質のうち、少なくとも一種以上を含む場合や、上述の「塩化物に属する物質」に該当する物質のうち、少なくとも一種以上含む場合も該当する。さらに、上述の「糖アルコール類に属する物質」に該当する物質のいずれかと、上述の「塩化物に属する物質」に該当する物質のいずれかとの混合物もある。 In addition, in addition to erythritol, xylitol, and mannitol exemplified above, for example, sorbitol (C 6 H 14 O 6 ), lactitol (C 12 H 24 O) 11 )) "Substances belonging to sugar alcohols". In addition, it belongs to “chloride such as calcium chloride hexahydrate (CaCl 2 .6H 2 O), magnesium chloride hexahydrate (MgCl 2 .6H 2 O), potassium chloride (KCl), and sodium chloride (NaCl). There are substances. In addition, a case where at least one of the substances corresponding to the above-mentioned “substances belonging to sugar alcohols” is included, and a case where at least one of the substances corresponding to the above-mentioned “substances belonging to chloride” is included are also applicable. I do. Furthermore, there is also a mixture of any of the above-mentioned substances belonging to “sugar alcohols” and any of the above-mentioned “substances belonging to chloride”.

潜熱蓄熱材組成物１では、前述したように、主成分である潜熱蓄熱材１０が、酢酸ナトリウム三水和物である。酢酸ナトリウム三水和物は、無機塩水和物系の潜熱蓄熱材の中でも、特に過冷却現象を顕著に生じ易い物性であり、過冷却現象を防ぐため、潜熱蓄熱材組成物１には、過冷却防止剤２３が配合されている。過冷却防止剤２３は、本実施形態では、リン酸水素二ナトリウム（Ｎａ２ＨＰＯ４）である。なお、このような過冷却防止剤２３を添加する代わりに、潜熱蓄熱材組成物１中に金属片を加え、使用者が、この金属片への押圧や、曲げ等の外的な操作を行うことにより、潜熱蓄熱材組成物１の過冷却現象を解除する場合もある。さらに、主成分である潜熱蓄熱材を構成する無機塩水和物の種類によって、過冷却防止剤や金属片を加えない場合もある。 In the latent heat storage material composition 1, as described above, the latent heat storage material 10 as a main component is sodium acetate trihydrate. Sodium acetate trihydrate is one of the inorganic salt hydrate-based latent heat storage materials, which has a property that a supercooling phenomenon is particularly easily caused. In order to prevent the supercooling phenomenon, the latent heat storage material composition 1 A cooling inhibitor 23 is included. In the present embodiment, the supercooling inhibitor 23 is disodium hydrogen phosphate (Na 2 HPO 4 ). Instead of adding such a supercooling inhibitor 23, a metal piece is added to the latent heat storage material composition 1, and the user performs an external operation such as pressing or bending the metal piece. Thereby, the supercooling phenomenon of the latent heat storage material composition 1 may be canceled. Further, depending on the type of the inorganic salt hydrate constituting the latent heat storage material as the main component, the supercooling inhibitor or the metal piece may not be added in some cases.

次に、本出願人は、直射日光に晒した潜熱蓄熱材組成物１に対し、太陽光による吸光を実際に確認するための検証実験を行い、検証実験を通じて、着色剤２１の役割に有意性があることを確認した。図２は、実施形態の潜熱蓄熱材組成物に含有した着色剤の効果を確認する実験で、着色剤有無別のサンプルを対比して観察した様子を示す模式図であり、（ａ）は、直射日光を浴びたサンプル上面の様子を示す平面図、（ｂ）は、（ａ）中、Ａ−Ａ矢視断面、Ｂ−Ｂ矢視断面を、それぞれ示す。図２に示すように、検証実験は、着色剤２１を添加した潜熱蓄熱材組成物１を用いた実施例に係る試料（第１サンプル３１）と、着色剤２１を添加していない潜熱蓄熱材組成物２を用いた比較例に係る試料（第２サンプル３２）を対比した実験である。   Next, the applicant conducted a verification experiment for actually confirming the absorption of sunlight by the latent heat storage material composition 1 exposed to direct sunlight, and through the verification experiment, the significance of the role of the colorant 21 was confirmed. Confirmed that there is. FIG. 2 is a schematic diagram showing an experiment for confirming the effect of the coloring agent contained in the latent heat storage material composition of the embodiment, and showing a state in which samples with and without the coloring agent are compared and observed. FIG. 2B is a plan view showing the state of the upper surface of the sample exposed to direct sunlight, and FIG. 2B is a sectional view taken along line AA and BB in FIG. As shown in FIG. 2, in the verification experiment, a sample (first sample 31) using the latent heat storage material composition 1 to which the colorant 21 was added and a latent heat storage material to which the colorant 21 was not added were used. This is an experiment comparing a sample (second sample 32) according to a comparative example using composition 2.

＜潜熱蓄熱材組成物の仕様＞
・比較例では、潜熱蓄熱材１０（酢酸ナトリウム三水和物）を１４０ｇと、融点調整剤２２（エリスリトール）を６０ｇと、過冷却防止剤２３（リン酸水素二ナトリウム）を３ｇとした割合で秤取して混合することにより、潜熱蓄熱材組成物２（総重量２０３ｇ）を生成した。この潜熱蓄熱材組成物２は、それ自体の色として、白色を呈している。
・実施例では、潜熱蓄熱材組成物２の組成に基づいた上で、さらに黒色の着色剤２１（植物炭素色素を水に分散させた液体着色料）を２ｇ加えて、潜熱蓄熱材１０と、融点調整剤２２と、過冷却防止剤２３と、着色剤２１とを混合することにより、潜熱蓄熱材組成物１（総重量２０５ｇ）を生成した。この潜熱蓄熱材組成物１は、着色剤２１により黒色を呈している。
・潜熱蓄熱材組成物の融解温度；実施例の潜熱蓄熱材組成物１、比較例の潜熱蓄熱材組成物２とも、約４０℃付近に調整
・潜熱蓄熱材組成物の蓄熱量；潜熱蓄熱材組成物１，２とも、約３５０ｋＪ／Ｌ <Specification of latent heat storage material composition>
In the comparative example, at a ratio of 140 g of the latent heat storage material 10 (sodium acetate trihydrate), 60 g of the melting point regulator 22 (erythritol), and 3 g of the supercooling inhibitor 23 (disodium hydrogen phosphate). By weighing and mixing, a latent heat storage material composition 2 (total weight 203 g) was produced. The latent heat storage material composition 2 has a white color as its own color.
In the example, based on the composition of the latent heat storage material composition 2, 2 g of a black colorant 21 (a liquid colorant in which a vegetable carbon pigment is dispersed in water) is further added, and the latent heat storage material 10 By mixing the melting point regulator 22, the supercooling inhibitor 23, and the colorant 21, a latent heat storage material composition 1 (total weight 205 g) was produced. The latent heat storage material composition 1 has a black color due to the colorant 21.
The melting temperature of the latent heat storage material composition; the temperature of both the latent heat storage material composition 1 of the example and the latent heat storage material composition 2 of the comparative example was adjusted to about 40 ° C .; the amount of heat storage of the latent heat storage material composition; About 350 kJ / L for both compositions 1 and 2

＜サンプルの作製＞
図２に示すように、第１サンプル３１の作製には、太陽光を透過可能な充填袋３０として、無色透明で無延伸ポリプロピレンフィルム（CPP：Cast polypropylene films）製の袋が、入れ子のように、２枚重ねの態様で用いられ、凝固した潜熱蓄熱材組成物１の内部でエアポケットが生じないよう、一度融解させた液相状態の潜熱蓄熱材組成物１を内側の袋に充填した後、この潜熱蓄熱材組成物１を袋内で凝固させた。次いで、真空脱気シーラにより、潜熱蓄熱材組成物１を充填した内側の袋内を吸引し、収縮した袋が潜熱蓄熱材組成物１と密着した状態になるまで、袋内を脱気すると同時に、この袋の開口を完全に封止した。さらに、潜熱蓄熱材組成物１を封入した内側の袋を、外側の袋に収容した後、真空脱気シーラにより、外側の袋内を吸引し、収縮した外側の袋が潜熱蓄熱材組成物１を封入した内側の袋と密着した状態になるまで、外側の袋内を脱気すると同時に、この袋の開口を完全に封止した。かくして、第１サンプル３１を作製した。第２サンプル３２についても、第１サンプル３１と同じ要領で作製した。 <Preparation of sample>
As shown in FIG. 2, in the preparation of the first sample 31, a bag made of a colorless and transparent unstretched polypropylene film (CPP: Cast polypropylene films) is used as a filled bag 30 that can transmit sunlight, like a nest. After filling the latent heat storage material composition 1 in a liquid state once melted into an inner bag so that air pockets are not generated inside the solidified latent heat storage material composition 1 which is used in a two-ply mode. This latent heat storage material composition 1 was solidified in a bag. Next, the inside of the bag filled with the latent heat storage material composition 1 is sucked by a vacuum degassing sealer, and the inside of the bag is degassed until the contracted bag comes into close contact with the latent heat storage material composition 1. The opening of this bag was completely sealed. Further, after the inner bag enclosing the latent heat storage material composition 1 is accommodated in the outer bag, the inside of the outer bag is sucked by a vacuum degassing sealer, and the contracted outer bag becomes the latent heat storage material composition 1. The inside of the outer bag was evacuated until the inside of the bag was in close contact with the inner bag, and the opening of the bag was completely sealed. Thus, a first sample 31 was produced. The second sample 32 was also manufactured in the same manner as the first sample 31.

＜実験実施日＞
・日時；２０１８年５月２５日 午前１０時〜午後５時
・天候；晴れ <Experiment date>
・ Date; May 25, 2018, 10:00 am to 5:00 pm ・ Weather; sunny

＜実験方法＞
・舗装されていない土壌の地面ＧＬに、この地面ＧＬからの熱の影響を受け難い段ボール製の敷物（図示省略）を敷き、直射日光がそれぞれ均等に照射される条件の下、敷物の上に、図２に示すように、第１サンプル３１と第２サンプル３２とを並置すると共に、３種の熱電対と電気的に接続したデータ記録装置（データロガー）を、直射日光が当たらないよう段ボール製の覆い物を被せた状態で、設置した。第１の熱電対は、第１サンプル３１の下面３１ｂに接着され、第１の熱電対により、第１サンプル３１の潜熱蓄熱材組成物１の温度を測定し、その測定値をデータロガーに記録した。第２の熱電対は、第２サンプル３２の下面３２ｂに接着され、第２の熱電対により、第２サンプル３２の潜熱蓄熱材組成物２の温度を測定し、その測定値をデータロガーに記録した。気温測定用の第３の熱電対は、データロガーを被せた覆い物内の気温を測定し、その測定値をデータロガーに記録した。
・第１サンプル３１側の温度測定値と、第２サンプル３２側の温度測定値とを比較して、潜熱蓄熱材組成物１と潜熱蓄熱材組成物２に対し、吸光に差異があるか否かを、外観観察と共に確認した。 <Experiment method>
・ A corrugated cardboard rug (not shown) that is not easily affected by the heat from the ground GL is laid on the ground GL of the unpaved soil, and the rug is placed on the rug under the condition that each of the direct sunlight is uniformly irradiated. As shown in FIG. 2, the first sample 31 and the second sample 32 are juxtaposed, and a data recording device (data logger) electrically connected to three kinds of thermocouples is placed on a corrugated cardboard so as not to be exposed to direct sunlight. It was installed in a state where it was covered with a metal cover. The first thermocouple is adhered to the lower surface 31b of the first sample 31, measures the temperature of the latent heat storage material composition 1 of the first sample 31 with the first thermocouple, and records the measured value on a data logger. did. The second thermocouple is adhered to the lower surface 32b of the second sample 32, measures the temperature of the latent heat storage material composition 2 of the second sample 32 with the second thermocouple, and records the measured value on a data logger. did. A third thermocouple for temperature measurement measured the temperature inside the covering covered with the data logger and recorded the measured value on the data logger.
By comparing the temperature measurement value on the first sample 31 side and the temperature measurement value on the second sample 32 side, whether or not there is a difference in absorption between the latent heat storage material composition 1 and the latent heat storage material composition 2 This was confirmed together with the appearance observation.

＜実験結果＞
図３は、検証実験の結果を、蓄熱材温度と時間との関係で示したグラフである。図３に示すように、融解時間帯Ｉでは、潜熱蓄熱材組成物１を用いた第１サンプル３１と、潜熱蓄熱材組成物２を用いた第２サンプル３２の双方とも、直射日光による加熱で、潜熱蓄熱材組成物１，２の融解が４０℃付近で開始されたことにより、潜熱蓄熱材組成物１，２で温度が一定になる挙動が観測された。またこのとき、着色剤２１を含有した潜熱蓄熱材組成物１で、融解に要した時間は、着色剤２１を含有していない潜熱蓄熱材組成物２で、融解に要した時間に比べて、短かった。 <Experimental results>
FIG. 3 is a graph showing the results of the verification experiment in relation to the temperature of the heat storage material and time. As shown in FIG. 3, in the melting time zone I, both the first sample 31 using the latent heat storage material composition 1 and the second sample 32 using the latent heat storage material composition 2 were heated by direct sunlight. Since the melting of the latent heat storage material compositions 1 and 2 was started at around 40 ° C., a behavior in which the temperature of the latent heat storage material compositions 1 and 2 became constant was observed. Also, at this time, the time required for melting in the latent heat storage material composition 1 containing the colorant 21 was shorter than the time required for melting in the latent heat storage material composition 2 not containing the colorant 21. It was short.

また、吸熱時間帯ＩＩでは、特に日中の温度が高くなる時間帯で、第１サンプル３１側での温度測定値が、第２サンプル３２側での温度測定値に比べ、１０℃程高くなっており、第１サンプル３１側の潜熱蓄熱材組成物１で、太陽光の照射により吸熱される熱量が、より多くなっていることが観察された。凝固時間帯ＩＩＩになると、潜熱蓄熱材組成物１，２の温度は、融解温度に近い約４０℃を超えて低くなり、第１サンプル３１と第２サンプル３２の双方とも、潜熱蓄熱材組成物１，２は、液相から固相への相変化を起こし、凝固し始めた。   Further, in the endothermic time zone II, the temperature measurement value on the first sample 31 side is higher by about 10 ° C. than the temperature measurement value on the second sample 32 side, especially in a time zone when the daytime temperature is high. It was observed that in the latent heat storage material composition 1 on the first sample 31 side, the amount of heat absorbed by the irradiation of sunlight was larger. In the solidification time zone III, the temperature of the latent heat storage material compositions 1 and 2 becomes lower than about 40 ° C., which is close to the melting temperature, and both the first sample 31 and the second sample 32 use the latent heat storage material composition. Sample Nos. 1 and 2 caused a phase change from a liquid phase to a solid phase, and started to solidify.

＜考察＞
第１サンプル３１に用いた潜熱蓄熱材組成物１は、第２サンプル３２に用いた潜熱蓄熱材組成物２と、着色剤２１の添加の有無以外の点で、共通する仕様になっている。他方、融解時間帯Ｉにおいて、潜熱蓄熱材組成物１で融解に要した時間が、潜熱蓄熱材組成物２で融解に要した時間より短かったことや、吸熱時間帯ＩＩにおいて、第１サンプル３１側の温度測定値が、第２サンプル３２側の温度測定値に比べて１０℃程高くなったことは、潜熱蓄熱材組成物１に着色剤２１が添加されているためと考えられる。 <Discussion>
The latent heat storage material composition 1 used for the first sample 31 has the same specifications as the latent heat storage material composition 2 used for the second sample 32 except for the presence or absence of the coloring agent 21. On the other hand, in the melting time zone I, the time required for melting in the latent heat storage material composition 1 was shorter than the time required for melting in the latent heat storage material composition 2, and in the heat absorption time zone II, the first sample 31 The temperature measurement value on the side of the second sample 32 is higher by about 10 ° C. than the temperature measurement value on the side of the second sample 32, which is presumably because the colorant 21 is added to the latent heat storage material composition 1.

すなわち、第１サンプル３１は、直射日光の照射を最も受ける上面３１ａを主に、太陽光により照射され、充填袋３０内の潜熱蓄熱材組成物１も、照射された太陽光によって熱を吸収する。このとき、潜熱蓄熱材組成物１には、着色剤２１が含有されているため、着色剤２１により、太陽光が、潜熱蓄熱材組成物１に効率良く吸収され、潜熱蓄熱材組成物１への吸光量が、着色剤２１を含有していない潜熱蓄熱材組成物２の吸光量より多くなる。そのため、太陽光による熱が、潜熱蓄熱材組成物１に効率良く吸収され、潜熱蓄熱材組成物１への吸熱量が、潜熱蓄熱材組成物２の吸熱量より、多くなったものと推察される。   That is, the first sample 31 is mainly irradiated with sunlight on the upper surface 31a which is most exposed to direct sunlight, and the latent heat storage material composition 1 in the filling bag 30 also absorbs heat by the irradiated sunlight. . At this time, since the latent heat storage material composition 1 contains the colorant 21, sunlight is efficiently absorbed by the latent heat storage material composition 1 by the colorant 21 and is transferred to the latent heat storage material composition 1. Is larger than the absorbance of the latent heat storage material composition 2 which does not contain the colorant 21. Therefore, it is inferred that the heat due to sunlight was efficiently absorbed by the latent heat storage material composition 1 and the amount of heat absorbed by the latent heat storage material composition 1 was larger than the amount of heat absorbed by the latent heat storage material composition 2. You.

特に、着色剤２１により、潜熱蓄熱材組成物１への吸光量が多くなっていることによって、融解時間帯Ｉにおける潜熱蓄熱材組成物１の融解時間が、より短くなり、顕熱による潜熱蓄熱材組成物１の温度の立ち上りが、着色剤２１を含有していない潜熱蓄熱材組成物２に比べ、急峻になるばかりか、温度ピークも１０℃程高くなったものと考えられる。   In particular, since the amount of light absorbed by the latent heat storage material composition 1 by the colorant 21 is increased, the melting time of the latent heat storage material composition 1 in the melting time zone I becomes shorter, and the latent heat storage by sensible heat is performed. It is considered that the temperature rise of the material composition 1 became steeper than that of the latent heat storage material composition 2 containing no coloring agent 21, and the temperature peak also increased by about 10 ° C.

次に、本実施形態の潜熱蓄熱材組成物１の作用・効果について説明する。本実施形態の潜熱蓄熱材組成物１は、相変化に伴う潜熱の出入りを利用して、蓄熱またはその放熱を行う潜熱蓄熱材１０に、該潜熱蓄熱材１０の状態または物性を調整する３種の添加物２０を配合してなる潜熱蓄熱材組成物において、潜熱蓄熱材１０は、酢酸ナトリウム三水和物であり、添加物２０は、第１の添加物として、太陽光の吸収を促す色に呈色する色素を有した着色剤２１であること、当該潜熱蓄熱材組成物１が液相状態にある場合に、着色剤２１は、潜熱蓄熱材１０の融液に分散され、当該潜熱蓄熱材組成物１が固相状態にある場合には、着色剤２１は、潜熱蓄熱材１０の粒子間に分散されて、当該潜熱蓄熱材組成物１全体が、着色剤２１により黒色に呈色されていること、を特徴とする。   Next, the operation and effect of the latent heat storage material composition 1 of the present embodiment will be described. The latent heat storage material composition 1 of the present embodiment uses three types of latent heat storage materials 10 that perform heat storage or heat release by utilizing the entrance and exit of latent heat due to a phase change, and adjust the state or physical properties of the latent heat storage material 10. In the latent heat storage material composition containing the additive 20 of the formula (1), the latent heat storage material 10 is sodium acetate trihydrate, and the additive 20 has a color that promotes absorption of sunlight as a first additive. When the latent heat storage material composition 1 is in a liquid phase state, the colorant 21 is dispersed in a melt of the latent heat storage material 10 and the latent heat storage material is dispersed. When the material composition 1 is in the solid state, the colorant 21 is dispersed between the particles of the latent heat storage material 10, and the entire latent heat storage material composition 1 is colored black by the colorant 21. Is characterized.

この特徴により、黒色に呈色した潜熱蓄熱材組成物１には、太陽光からの吸光が促進されるため、潜熱蓄熱材組成物１への吸光量が、着色剤２１を含有していない潜熱蓄熱材組成物２の吸光量より多くなる。そのため、太陽光による熱が、潜熱蓄熱材組成物１に効率良く吸収され、潜熱蓄熱材組成物１への吸熱量が、潜熱蓄熱材組成物２の吸熱量より多くなるのに加え、黒色に着色していない蓄熱材を収容する収納カバーだけに、黒色の塗料膜を施した特許文献１の技術に比べても、黒色に呈色した潜熱蓄熱材組成物１の吸熱量は、より確実に多くなる。また、着色剤２１を含有していない潜熱蓄熱材組成物２に比べて、潜熱蓄熱材組成物１の融解時間が、より短くなり、顕熱による潜熱蓄熱材組成物１の温度の立ち上りは、急峻になり、温度ピークも１０℃程高くすることができる。   Due to this feature, the latent heat storage material composition 1 which is colored black promotes the absorption of sunlight, so that the amount of light absorbed by the latent heat storage material composition 1 is reduced by the latent heat containing no colorant 21. It becomes larger than the amount of light absorbed by the heat storage material composition 2. Therefore, the heat from sunlight is efficiently absorbed by the latent heat storage material composition 1, and the amount of heat absorbed by the latent heat storage material composition 1 becomes larger than the amount of heat absorbed by the latent heat storage material composition 2. The heat absorption of the black-colored latent heat storage material composition 1 is more reliable than the technique of Patent Document 1 in which only the storage cover that stores the uncolored heat storage material is provided with a black paint film. More. Further, as compared with the latent heat storage material composition 2 not containing the coloring agent 21, the melting time of the latent heat storage material composition 1 is shorter, and the rise of the temperature of the latent heat storage material composition 1 by sensible heat is as follows. It becomes steep and the temperature peak can be raised by about 10 ° C.

従って、本実施形態の潜熱蓄熱材組成物１によれば、太陽光に基づく熱源で蓄熱を行う場合でも、熱を効率良く蓄えることができる、という優れた効果を奏する。   Therefore, according to the latent heat storage material composition 1 of the present embodiment, there is an excellent effect that heat can be efficiently stored even when heat is stored by a heat source based on sunlight.

また、本実施形態の潜熱蓄熱材組成物１では、着色剤２１は、炭素を主成分とした炭素色素であること、を特徴とする。この特徴により、着色剤２１の主成分である炭素は、伝熱性が比較的高い物性であるため、着色剤２１自体が、潜熱蓄熱材組成物１において、蓄熱速度や放熱速度の向上に寄与する。加えて、曇天などの影響で太陽光を熱源とすることが困難な状況下にあり、たとえ温水などの代替熱源を使用する場合でも、蓄熱に要する時間を短縮することができる。   Further, the latent heat storage material composition 1 of the present embodiment is characterized in that the colorant 21 is a carbon pigment containing carbon as a main component. Due to this feature, carbon, which is the main component of the colorant 21, has relatively high heat transfer properties, so the colorant 21 itself contributes to the improvement of the heat storage rate and the heat release rate in the latent heat storage material composition 1. . In addition, under circumstances where it is difficult to use sunlight as a heat source due to the effects of cloudy weather or the like, even when an alternative heat source such as hot water is used, the time required for heat storage can be reduced.

また、本実施形態の潜熱蓄熱材組成物１では、当該潜熱蓄熱材組成物１全体の重量に占める着色剤２１の配合比率は、０ｗｔ％より大きく、１ｗｔ％以下の範囲内であること、を特徴とする。この特徴により、潜熱蓄熱材組成物１全体を、着色剤２１の色素の色である黒色に一様に着色するのに、十分足り得る。また、このような配合比率で着色剤２１が配合されていれば、潜熱蓄熱材組成物１における融解温度や蓄熱量に対し、阻害要因となる悪影響を、着色剤２１によって及ぼすこともない。   Further, in the latent heat storage material composition 1 of the present embodiment, the blending ratio of the coloring agent 21 in the total weight of the latent heat storage material composition 1 is larger than 0 wt% and within 1 wt% or less. Features. With this feature, it is sufficient to uniformly color the entire latent heat storage material composition 1 to black, which is the color of the pigment of the colorant 21. Further, if the colorant 21 is blended at such a blending ratio, the colorant 21 does not exert an adverse effect on the melting temperature and the heat storage amount of the latent heat storage material composition 1 as an obstructive factor.

また、本実施形態の潜熱蓄熱材組成物１では、第２の添加物として、当該潜熱蓄熱材組成物１の融解温度を調整する融点調整剤２２が配合され、融点調整剤２２は、糖アルコール類に属する物質を少なくとも含んでおり、酢酸ナトリウム三水和物との溶解により、負の溶解熱を発生する物性を有すること、糖アルコール類に属する物質は、エリスリトール（Ｃ４Ｈ１０Ｏ４）であること、を特徴とする。この特徴により、潜熱蓄熱材組成物１の融解温度を調整できると共に、潜熱蓄熱材組成物１の粘度が増大し、潜熱蓄熱材１０と着色剤２１との密度差に起因した潜熱蓄熱材１０と着色剤２１との分離や、過冷却防止剤２３も含めて、潜熱蓄熱材組成物１の構成成分同士の分離を防止することができる。そのため、潜熱蓄熱材組成物１の構成成分間の不均一化が発生しないため、潜熱蓄熱材組成物１は、化学的に安定した蓄熱材となり得る。しかも、融点調整剤２２が潜熱蓄熱材１０に加わることで、潜熱蓄熱材１０の融点を大幅に調整できると共に、融点調整剤２２自体も蓄熱性能を具備しているため、融点調整剤２２が配合されても、約３５０ｋＪ／Ｌという、大きな蓄熱量を得ることができる。 Further, in the latent heat storage material composition 1 of the present embodiment, a melting point regulator 22 for adjusting the melting temperature of the latent heat storage material composition 1 is blended as a second additive, and the melting point regulator 22 is a sugar alcohol. At least contains a substance belonging to the class, and has the property of generating a negative heat of solution upon dissolution with sodium acetate trihydrate. The substance belonging to the sugar alcohols is erythritol (C 4 H 10 O 4 ) Is characterized by the following. With this feature, the melting temperature of the latent heat storage material composition 1 can be adjusted, the viscosity of the latent heat storage material composition 1 increases, and the latent heat storage material 10 due to the density difference between the latent heat storage material 10 and the colorant 21 can be adjusted. Separation from the colorant 21 and separation of the components of the latent heat storage material composition 1 can be prevented, including the supercooling inhibitor 23. Therefore, since non-uniformity does not occur between the constituent components of the latent heat storage material composition 1, the latent heat storage material composition 1 can be a chemically stable heat storage material. In addition, the melting point modifier 22 is added to the latent heat storage material 10, so that the melting point of the latent heat storage material 10 can be greatly adjusted. In addition, the melting point regulator 22 itself has heat storage performance. Even so, a large heat storage amount of about 350 kJ / L can be obtained.

また、本実施形態の潜熱蓄熱材組成物１では、第３の添加物として、例えば、リン酸水素二ナトリウム（Ｎａ２ＨＰＯ４）等に挙げられるような、融液状態にある酢酸ナトリウム三水和物に対し、結晶化の誘起を促す過冷却防止剤２３が配合されていること、を特徴とする。この特徴により、過冷却現象が顕著に生じ易いとされる酢酸ナトリウム三水和物（潜熱蓄熱材１０）でも、過冷却現象の発現を防ぐことができる。 In the latent heat storage material composition 1 of the present embodiment, as a third additive, for example, sodium acetate trihydrate in a molten state, such as disodium hydrogen phosphate (Na 2 HPO 4 ), etc. It is characterized in that a supercooling inhibitor 23 that promotes the induction of crystallization is blended with the Japanese product. Due to this feature, even if sodium acetate trihydrate (latent heat storage material 10), which is supposed to cause the supercooling phenomenon remarkably, it is possible to prevent the occurrence of the supercooling phenomenon.

また、本実施形態の潜熱蓄熱材組成物１では、無機塩水和物は、酢酸ナトリウム三水和物（ＣＨ３ＣＯＯＮａ・３Ｈ２Ｏ）あること、を特徴とする。この特徴により、体積当たりの潜熱の蓄熱量について、酢酸ナトリウム三水和物単体での潜熱の蓄熱量は、４００ｋＪ／Ｌ近傍と、無機塩水和物系の潜熱蓄熱材の中でも、大きい。そのため、酢酸ナトリウム三水和物を主成分とする潜熱蓄熱材組成物１は、蓄熱できる潜熱の蓄熱量を、３００ｋＪ／Ｌ超えも可能になる程、大容量の熱を蓄えることができ、それを放熱する蓄放熱性能を具備することができるため、蓄熱材の物性として優れている。しかも、酢酸ナトリウム三水和物単体の融点は５８℃であるため、潜熱蓄熱材組成物１の融解温度を、３０〜５８℃付近の温度帯域に調整する場合に、融点調整剤２２を配合すれば、融解温度の調整を容易に行うことができる。 Further, the latent heat storage material composition 1 of the present embodiment is characterized in that the inorganic salt hydrate is sodium acetate trihydrate (CH 3 COONa · 3H 2 O). Due to this characteristic, the latent heat storage amount per unit volume of sodium acetate trihydrate alone is about 400 kJ / L, which is the largest among latent heat storage materials based on inorganic salt hydrate. Therefore, the latent heat storage material composition 1 containing sodium acetate trihydrate as a main component can store a large amount of heat so that the amount of latent heat that can be stored can exceed 300 kJ / L. The heat storage material is excellent in physical properties because it can have heat storage and heat dissipation performance for heat dissipation. In addition, since the melting point of sodium acetate trihydrate alone is 58 ° C., when adjusting the melting temperature of the latent heat storage material composition 1 to a temperature range of about 30 to 58 ° C., the melting point modifier 22 must be added. If this is the case, the melting temperature can be easily adjusted.

また、本実施形態の潜熱蓄熱材組成物１では、当該潜熱蓄熱材組成物１は、融解温度を３０〜５８℃の範囲内に調整した物性であること、を特徴とする。この特徴により、例えば、災害時用マット５０等のような採暖用具を利用して、人が、潜熱蓄熱材組成物１の放熱によって暖を取る場合に、採暖用具使用者の低温やけどを防ぎつつ、採暖用具を利用する寝床内等の特定場所やその周辺を、快適な温度に保つことができる。特に、例示した災害時用マット５０の上に布団５３を敷いて、人が寝たとき、寝床内の温度を３０℃〜４０℃に保つことができる。   Further, the latent heat storage material composition 1 of the present embodiment is characterized in that the latent heat storage material composition 1 has physical properties whose melting temperature is adjusted within a range of 30 to 58 ° C. With this feature, for example, when a person uses a warming device such as a disaster mat 50 to take warmth by radiating the heat of the latent heat storage material composition 1, the user can prevent low-temperature burns of the user of the warming device. In addition, it is possible to maintain a comfortable temperature in a specific place such as in a bed using the warming tool and the surrounding area. In particular, the futon 53 is laid on the illustrated disaster mat 50, and when a person sleeps, the temperature in the bed can be kept at 30C to 40C.

また、本実施形態の災害時用マット５０は、暖を取るための採暖用具において、マット状の袋体であるマット状容器５１と、相変化に伴う潜熱の出入りを利用して蓄熱または放熱を行う潜熱蓄熱材１０に、該潜熱蓄熱材１０の物性を調整する３種の添加物２０（着色剤２１、融点調整剤２２、過冷却防止剤２３）を配合してなる潜熱蓄熱材組成物１と、を有し、潜熱蓄熱材組成物１は、マット状容器５１に設けられ、太陽光に基づく熱源、または当該潜熱蓄熱材組成物１を融解温度以上に加熱可能な熱源によって蓄熱し、蓄えた潜熱の放熱により、マット状容器５１及びその周囲を暖めること、潜熱蓄熱材組成物１は、前述した潜熱蓄熱材組成物１であること、を特徴とする。   In addition, the disaster mat 50 of the present embodiment is a heating device for taking warmth, and uses a mat-shaped container 51 which is a mat-shaped bag and heat storage or heat radiation by utilizing the entrance and exit of latent heat due to a phase change. A latent heat storage material composition 1 in which three kinds of additives 20 (colorant 21, melting point regulator 22, and supercooling inhibitor 23) for adjusting the physical properties of the latent heat storage material 10 are mixed with the latent heat storage material 10 to be performed. The latent heat storage material composition 1 is provided in the mat-shaped container 51 and stores heat by a heat source based on sunlight or a heat source capable of heating the latent heat storage material composition 1 to a melting temperature or higher. The latent heat storage material composition 1 is the latent heat storage material composition 1 described above, in which the mat-shaped container 51 and its surroundings are warmed by the release of the latent heat.

この特徴により、自然災害に伴い、避難先において、電力やガス等のエネルギを確保できない場合に、仮設の寝床に災害時用マット５０を使用すれば、潜熱蓄熱材組成物１の放熱により、寝床自体やその周りを暖めることができるため、就寝時に避難先での寒さを解消することができる。また、災害時用マット５０は、ホットカーペットや湯たんぽと同じような使い方で、避難先で使用することができるため、災害時用マット５０の周辺を含めて暖かくなり、避難先での寒さは解消され得る。ひいては、災害時用マット５０は、災害時における避難生活の質の向上に貢献することができる。   According to this feature, when energy such as electric power or gas cannot be secured at an evacuation site due to a natural disaster, if the disaster mat 50 is used for a temporary bed, the heat of the latent heat storage material composition 1 releases heat to the bed. Because it and the surroundings can be warmed, it is possible to eliminate the cold at the evacuation site at bedtime. In addition, since the disaster mat 50 can be used in an evacuation area in the same manner as a hot carpet or a hot water bottle, the area including the area around the disaster mat 50 becomes warm and the cold at the evacuation area is eliminated. Can be done. Consequently, the disaster mat 50 can contribute to improving the quality of evacuation life during a disaster.

さらに、潜熱蓄熱材組成物１に着色剤２１が含有されていることから、日中、災害時用マット５０を日光に晒して、潜熱蓄熱材組成物１に蓄熱しておくときに、潜熱蓄熱材組成物１への伝熱速度が、着色剤２１を含有していない潜熱蓄熱材組成物２に比べて速く、災害時用マット５０の使い勝手は良好である。また、災害時用マット５０は、マット状容器５１に封入した潜熱蓄熱材組成物１全体の深部からも、蓄えた熱を放熱することができているため、暖に必要な熱を、より長い時間、供給し続けることができる。   Further, since the colorant 21 is contained in the latent heat storage material composition 1, when the disaster mat 50 is exposed to sunlight during the day to store heat in the latent heat storage material composition 1, the latent heat storage material 1 is used. The heat transfer rate to the material composition 1 is higher than that of the latent heat storage material composition 2 containing no coloring agent 21, and the usability of the disaster mat 50 is good. Further, since the disaster mat 50 can radiate the stored heat even from the deep part of the entire latent heat storage material composition 1 sealed in the mat-shaped container 51, the heat required for warming is longer. Time, can continue to supply.

以上において、本発明を実施形態に即して説明したが、本発明は上記実施形態に限定されるものではなく、その要旨を逸脱しない範囲で、適宜変更して適用できる。   In the above, the present invention has been described with reference to the embodiments. However, the present invention is not limited to the above embodiments, and can be appropriately modified and applied without departing from the gist thereof.

例えば、実施形態では、採暖用具を、自然災害に伴う避難所生活で使用される災害時用マット５０としたが、採暖用具は、例えば、キャンプ等の屋外で使用されるアウトドア向けの採暖マット等のように、本発明の潜熱蓄熱材組成物からの放熱を利用して暖を取る製品であれば、実施形態に限定されず、何でも良い。   For example, in the embodiment, the warming tool is a disaster mat 50 used in evacuation shelter accompanying a natural disaster, but the warming tool is, for example, an outdoor warm mat used outdoors such as a camp. The product is not limited to the embodiment as long as it warms by utilizing heat radiation from the latent heat storage material composition of the present invention as described above, and may be anything.

１ 潜熱蓄熱材組成物
１０ 潜熱蓄熱材
２０ 添加物
２１ 着色剤（添加物、第１の添加物）
２２ 融点調整剤（添加物、第２の添加物）
２３ 過冷却防止剤（添加物、第３の添加物）
５０ 災害時用マット（採暖用具）
５１ マット状容器 DESCRIPTION OF SYMBOLS 1 Latent heat storage material composition 10 Latent heat storage material 20 Additive 21 Colorant (additive, first additive)
22 Melting point modifier (additive, second additive)
23 Supercooling inhibitor (additive, third additive)
50 Disaster mats (heating tools)
51 Matte container

Claims (12)

相変化に伴う潜熱の出入りを利用して、蓄熱またはその放熱を行う潜熱蓄熱材に、該潜熱蓄熱材の状態または物性を調整する添加物を配合してなる潜熱蓄熱材組成物において、
前記潜熱蓄熱材は、無機塩水和物であり、前記添加物は、第１の添加物として、太陽光の吸収を促す色に呈色する色素を有した着色剤であること、
当該潜熱蓄熱材組成物が液相状態にある場合に、前記着色剤は、前記無機塩水和物の融液に分散され、当該潜熱蓄熱材組成物が固相状態にある場合には、前記着色剤は、前記無機塩水和物の粒子間に分散されて、当該潜熱蓄熱材組成物全体が、前記着色剤により前記色に呈色されていること、
を特徴とする潜熱蓄熱材組成物。 A latent heat storage material composition comprising an additive that adjusts the state or physical properties of the latent heat storage material to a latent heat storage material that performs heat storage or heat dissipation by utilizing the entrance and exit of the latent heat associated with the phase change,
The latent heat storage material is an inorganic salt hydrate, and the additive is, as a first additive, a colorant having a pigment that exhibits a color that promotes absorption of sunlight.
When the latent heat storage material composition is in a liquid phase, the colorant is dispersed in a melt of the inorganic salt hydrate, and when the latent heat storage material composition is in a solid state, the colorant is dispersed. The agent is dispersed between particles of the inorganic salt hydrate, and the entire latent heat storage material composition is colored in the color by the colorant,
A latent heat storage material composition comprising: 請求項１に記載する潜熱蓄熱材組成物において、
前記着色剤は、炭素を主成分とした炭素色素であること、
を特徴とする潜熱蓄熱材組成物。 The latent heat storage material composition according to claim 1,
The colorant is a carbon pigment containing carbon as a main component,
A latent heat storage material composition comprising: 請求項２に記載する潜熱蓄熱材組成物において、
当該潜熱蓄熱材組成物全体の重量に占める前記着色剤の配合比率は、０ｗｔ％より大きく、１ｗｔ％以下の範囲内であること、
を特徴とする潜熱蓄熱材組成物。 The latent heat storage material composition according to claim 2,
The compounding ratio of the coloring agent in the total weight of the latent heat storage material composition is greater than 0 wt% and within a range of 1 wt% or less;
A latent heat storage material composition comprising: 請求項１乃至請求項３のいずれか１つに記載する潜熱蓄熱材組成物において、
前記第１の添加物とは別の前記添加物で、第２の添加物として、当該潜熱蓄熱材組成物の融解温度を調整する融点調整剤が配合され、
前記融点調整剤は、糖アルコール類に属する物質を少なくとも含んでおり、前記無機塩水和物との溶解により、負の溶解熱を発生する物性を有すること、
を特徴とする潜熱蓄熱材組成物。 The latent heat storage material composition according to any one of claims 1 to 3,
A melting point regulator for adjusting the melting temperature of the latent heat storage material composition, as the second additive, the additive being different from the first additive;
The melting point modifier contains at least a substance belonging to sugar alcohols, and has a property of generating a negative heat of solution by dissolution with the inorganic salt hydrate.
A latent heat storage material composition comprising: 請求項４に記載する潜熱蓄熱材組成物において、
糖アルコール類に属する物質は、エリスリトール（Ｃ４Ｈ１０Ｏ４）、キシリトール（Ｃ５Ｈ１２Ｏ５）、またはマンニトール（Ｃ６Ｈ１４Ｏ６）のうち、少なくともいずれか一つを含むものであること、
を特徴とする潜熱蓄熱材組成物。 The latent heat storage material composition according to claim 4,
The substance belonging to sugar alcohols contains at least one of erythritol (C 4 H 10 O 4 ), xylitol (C 5 H 12 O 5 ), and mannitol (C 6 H 14 O 6 ). ,
A latent heat storage material composition comprising: 請求項５に記載する潜熱蓄熱材組成物において、
糖アルコール類に属する物質は、エリスリトール（Ｃ４Ｈ１０Ｏ４）であること、
を特徴とする潜熱蓄熱材組成物。 The latent heat storage material composition according to claim 5,
The substance belonging to sugar alcohols is erythritol (C 4 H 10 O 4 ),
A latent heat storage material composition comprising: 請求項１乃至請求項６のいずれか１つに記載する潜熱蓄熱材組成物において、
前記第１の添加物とは別の前記添加物で、第３の添加物として、融液状態にある前記無機塩水和物に対し、結晶化の誘起を促す過冷却防止剤が配合されていること、または、金属片が加えられていること、
を特徴とする潜熱蓄熱材組成物。 The latent heat storage material composition according to any one of claims 1 to 6,
A supercooling inhibitor that promotes the induction of crystallization with respect to the inorganic salt hydrate in a molten state is blended as a third additive, which is another additive different from the first additive. Or that a piece of metal has been added,
A latent heat storage material composition comprising: 請求項７に記載する潜熱蓄熱材組成物において、
前記過冷却防止剤は、リン酸水素二ナトリウム（Ｎａ２ＨＰＯ４）であること、
を特徴とする潜熱蓄熱材組成物。 The latent heat storage material composition according to claim 7,
The supercooling inhibitor is disodium hydrogen phosphate (Na 2 HPO 4 );
A latent heat storage material composition comprising: 請求項１乃至請求項８のいずれか１つに記載する潜熱蓄熱材組成物において、
前記無機塩水和物は、酢酸塩または硫酸塩のいずれかを、少なくとも一方含んでなること、
を特徴とする潜熱蓄熱材組成物。 The latent heat storage material composition according to any one of claims 1 to 8,
The inorganic salt hydrate comprises at least one of an acetate or a sulfate,
A latent heat storage material composition comprising: 請求項９に記載する潜熱蓄熱材組成物において、
前記酢酸塩は、酢酸ナトリウム三水和物（ＣＨ３ＣＯＯＮａ・３Ｈ２Ｏ）であること、
を特徴とする潜熱蓄熱材組成物。 The latent heat storage material composition according to claim 9,
The acetate is sodium acetate trihydrate (CH 3 COONa · 3H 2 O);
A latent heat storage material composition comprising: 請求項９または請求項１０に記載する潜熱蓄熱材組成物において、
当該潜熱蓄熱材組成物は、融解温度を３０〜５８℃の範囲内に調整した物性であること、
を特徴とする潜熱蓄熱材組成物。 The latent heat storage material composition according to claim 9 or claim 10,
The latent heat storage material composition has physical properties in which a melting temperature is adjusted within a range of 30 to 58 ° C,
A latent heat storage material composition comprising: 暖を取るための採暖用具において、
マット状の袋体であるマット状容器と、
相変化に伴う潜熱の出入りを利用して蓄熱または放熱を行う潜熱蓄熱材に、該潜熱蓄熱材の物性を調整する添加物を配合してなる潜熱蓄熱材組成物と、を有し、
前記潜熱蓄熱材組成物は、前記マット状容器に設けられ、太陽光に基づく熱源、または当該潜熱蓄熱材組成物を融解温度以上に加熱可能な熱源によって蓄熱し、蓄えた潜熱の放熱により、前記マット状容器及びその周囲を暖めること、
前記潜熱蓄熱材組成物は、請求項１乃至請求項１１のいずれか１つに記載する潜熱蓄熱材組成物であること、
を特徴とする採暖用具。 In warming tool to take warmth,
A mat-shaped container that is a mat-shaped bag,
Latent heat storage material that performs heat storage or heat radiation utilizing the ingress and egress of latent heat associated with the phase change, and a latent heat storage material composition obtained by blending an additive that adjusts the properties of the latent heat storage material,
The latent heat storage material composition is provided in the mat-shaped container, stores heat by a heat source based on sunlight, or a heat source capable of heating the latent heat storage material composition to a melting temperature or higher, and radiates the stored latent heat. Heating the mat-shaped container and its surroundings,
The latent heat storage material composition is the latent heat storage material composition according to any one of claims 1 to 11,
A warming tool characterized by the following.
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JP2021109896A (en) * 2020-01-08 2021-08-02 東邦瓦斯株式会社 Latent heat storage material composition
JP2021173510A (en) * 2020-04-30 2021-11-01 東邦瓦斯株式会社 Warming instrument heat storage method
JP2022022810A (en) * 2020-07-07 2022-02-07 東邦瓦斯株式会社 Heating tool and heating tool heat storage method
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JP7142137B1 (en) * 2021-11-09 2022-09-26 東邦瓦斯株式会社 Warming tool heat storage device and warming tool heat storage pedestal
JP7157986B1 (en) 2021-11-09 2022-10-21 東邦瓦斯株式会社 Light collecting unit and light collecting device

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