JP6909338B1 - Heating equipment and heating equipment heat storage method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress uneven heat storage and store heat with high efficiency in a heat collecting tool using a heat storage material. SOLUTION: A latent heat storage material composition 21 containing a colorant 25 colored in a color that promotes absorption of sunlight and capable of storing heat in an overcooled state, and a sealing portion 111 that seals the front surface and the back surface thereof. It has a mat-like container 11 in which a heat storage material encapsulation portion 117 for encapsulating the latent heat storage material composition 21 is formed, and at least the surface thereof is made of a resin material capable of transmitting sunlight, and the mat-like container 11 is sealed. Of the boundary 119 between the portion 111 and the heat storage material sealing portion 117, the non-linear portion 119a is provided in an arc shape, and the colored portion 121 colored in a color that promotes the absorption of sunlight along the boundary 119. Is provided. [Selection diagram] Fig. 1

Description

The present invention relates to a heat collecting tool and a heat storage method using a heat storage material.

For example, as shown in FIG. 11, Patent Document 1 describes a latent heat storage material 110 containing a colorant having a pigment that develops a color that promotes absorption of sunlight (for example, black), and has a transparent surface and sunlight. The heat collecting tool 100 enclosed in a mat-shaped container 101 formed of a resin material that permeates the heat is disclosed.

Japanese Unexamined Patent Publication No. 2020-12804

In the heating tool 100 described in Patent Document 1, the edge portion of the mat-shaped container 101 is sealed by the sealing portion 103, so that the heat storage material sealing portion 105 for sealing the latent heat storage material 110 is formed in a square shape. In such a heating tool 100, the corners Q of the heat storage material sealing portion 105 form a right angle, the latent heat storage material 110 does not sufficiently reach the corners Q, and the thickness near the corners Q is about half the thickness of the central portion R. there were. Further, the vicinity of the boundary 120 between the seal portion 103 and the latent heat storage material 110 may also be thinner than the central portion R. Therefore, in the heating tool 100, the color tone near the corner portion Q and the boundary 120 was lighter than the color tone of the central portion R. Due to this color unevenness, the latent heat storage material 110 near the corner portion Q and the boundary 120 was more difficult to store heat than the latent heat storage material 110 at the central portion R. Therefore, the conventional heating tool 100 has room for improving the heat storage unevenness.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a technique for suppressing heat storage unevenness and storing heat with high efficiency in a heat collecting tool using a heat storage material.

The heating tool according to one aspect of the present invention contains (1) a colorant colored in a color that promotes absorption of sunlight, and seals a heat storage material capable of storing heat in an overcooled state and a front surface and a back surface. The seal portion forms a heat storage material encapsulation portion for encapsulating the heat storage material, and has at least a mat-like container whose surface is made of a resin material capable of transmitting sunlight. Of the boundary between the seal portion and the heat storage material encapsulation portion, a non-linear portion is provided in an arc shape, and at least the surface is colored in a color that promotes absorption of sunlight along the boundary. It is characterized in that a part is provided.

In the heating tool having the above configuration, the thickness near the boundary can be made closer to the thickness of the central portion by forming the non-linear portion of the boundary between the heat storage material sealing portion and the sealing portion into an arc shape. As a result, the heat collecting tool has a color that promotes the absorption of sunlight up to the vicinity of the boundary by the latent heat storage material enclosed in the transparent mat-shaped container, and the heat storage unevenness due to the difference in color is reduced. Further, in the mat-like container, at least the surface formed of the transparent material is provided with a colored portion colored in a color that promotes the absorption of sunlight along the boundary, so that the color tone near the boundary colored by the heat storage material can be obtained. Even if it is thinner than the central part, the absorption of sunlight into the heat storage material near the boundary can be supplemented by the colored part. As described above, according to the heat collecting tool having the above configuration, heat can be uniformly stored in the heat storage material enclosed in the mat-shaped container, so that uneven heat storage can be suppressed and heat can be stored with high efficiency.

(2) In the heat collecting tool according to (1), the heat storage material can store heat depending on the overcooled state, and is sealed in the heat storage material sealing portion together with the heat storage material to release the overcooling state. The seal portion includes a member, an outer peripheral seal portion provided along the outer shape of the mat-shaped container, and a crease seal portion forming a crease of the mat-shaped container, and the heat storage material encapsulation portion includes a member. , It is preferable that the outer peripheral seal portion and the crease seal portion are continuously provided.

In the heating tool having the above configuration, since the heat storage material sealing portion is continuously provided by the outer peripheral sealing portion and the crease sealing portion, it is stable when the heating tool is folded or when the folded heating tools are stacked. Sex can be secured.

(3) In the heating tool according to (2), the mat-shaped container has a front surface and a back surface formed of a resin material capable of transmitting sunlight, has a square outer shape, and the outer peripheral seal portion has a square shape. The plurality of crease sealing portions are provided in a square shape along the outer shape of the mat-shaped container, and the plurality of crease sealing portions are provided perpendicular to the opposite first and second sides of the outer peripheral sealing portion, and are provided with the first side. It is preferable that the second side is alternately connected to each other and is provided up to the middle between the first side and the second side.

The heating tool having the above configuration is folded along a plurality of crease seal portions provided perpendicular to the first side and the second side of the outer peripheral seal portion facing each other. Since the plurality of crease seal portions are alternately connected to the first side and the second side, the heat storage material encapsulation portion is provided in a meandering manner. Since a plurality of crease seal portions are provided up to the middle between the first side and the second side, the heat storage material of the crease is not biased to either the first side or the second side, and the folded state is maintained. Stabilize. Since the front and back surfaces of the mat-shaped container of the heating tool are transparent, sunlight penetrates the entire heat storage material even when it is folded. Therefore, the heat collecting tool having the above configuration can stably and efficiently store heat.

(4) The method for storing heat of a heating tool according to any one of (1) to (3), wherein the heating tool is placed at a predetermined position for heating the ingredients of Sorakka. It is characterized by storing heat in a heat storage material.

In the heat storage method of the heat collecting tool having the above configuration, the sunlight collected at the predetermined position by the solar accca is efficiently absorbed by the heat storage material at the boundary of the heat collecting tool, so that the heat storage efficiency can be improved while suppressing the heat storage unevenness.

(5) The heat storage method for storing heat storage equipment according to (2) or (3), wherein the heat storage equipment is placed in a folded state at a predetermined position for heating the ingredients of Sorakkakka. It is characterized by storing heat in the material.

In the heat storage method of the heating tool having the above configuration, since the heating device is folded and placed at a predetermined position of the solar bacca in a state where the total height is raised, the amount of sunlight collected by the solar vacca is increased as compared with the case where the heating device is laid flat without folding. Therefore, according to the heat storage tool heat storage method having the above configuration, it is possible to improve the heat storage efficiency when the heat storage tool is stored with the solar bacca.

According to the present invention, in a heat collecting tool using a heat storage material, it is possible to realize a technique for suppressing heat storage unevenness and storing heat with high efficiency.

It is a top view of a mat for a disaster. It is an enlarged cross-sectional view of part A of FIG. It is a figure explaining the use example of the mat for a disaster. It is a figure which shows typically the constituent components of the heat storage material composition used for the mat for disasters shown in FIG. It is a figure explaining the heat storage method of the mat for a disaster. It is a figure explaining the mounting position of the button battery type thermometer in a heat storage performance test. It is a table which shows the performance test condition. It is a graph which shows the performance test result. It is a figure which shows the modification of the heat storage tool heat storage method. It is a figure which shows the modification of the heat storage tool heat storage method. It is a top view of the conventional heating equipment.

Hereinafter, an embodiment using a heat storage tool and a heat storage tool that stores heat in the heat storage material of the heat storage tool will be described in detail with reference to the attached drawings. This embodiment discloses, for example, a heat collecting mat used at the time of a natural disaster, and a heat storage method for storing heat in a heat storage material of the heat collecting mat.

<About mats for disasters>
FIG. 1 is a diagram showing a disaster mat 1. The disaster mat 1 of the present embodiment is a disaster mat for warming up. In the disaster mat 1, the latent heat storage material composition 21 and the metal piece 31 are sealed in a mat-shaped container 11 made of a mat-shaped transparent bag body. The disaster mat 1 is an example of a “warming tool”. The latent heat storage material composition 21 is an example of a “heat storage material”. The metal piece 31 is an example of the “supercooling release member”.

As the latent heat storage material composition 21, a material having a performance of keeping the temperature around the mat 1 for a disaster such as in a bed at 30 ° C to 40 ° C is used. If the temperature around the disaster mat 1 such as in the bed is kept at 30 ° C to 40 ° C, the user is less likely to cause low-temperature burns even if he / she directly touches the disaster mat 1. The disaster mat 1 may be about the size of a hot water bottle or an electric pad, or it may be large enough to cover the bed. By applying the disaster mat 1 to your favorite parts such as your legs, abdomen, and lower body, you can warm those parts.

The latent heat storage material composition 21 is a mixture containing the latent heat storage material as a main component. The latent heat storage material composition 21 is blended with a colorant colored in a color that promotes the absorption of sunlight, and is colored in a color that promotes the absorption of sunlight. In the present embodiment, the colorant colored in black is added, and the latent heat storage material composition 21 is colored in black.

When the latent heat storage material composition 21 begins to undergo a phase change from a liquid to a solid, the latent heat associated with solidification is released from the latent heat storage material to the surroundings, and the temperature rises to the melting point of the set latent heat storage material. The temperature of the latent heat storage material composition 21 decreases when the phase change from liquid to solid is completed.

The latent heat storage material of the latent heat storage material composition 21 has a supercooling function. The supercooling function is a function of developing a supercooled state in which when the melt of the latent heat storage material is cooled, it does not solidify at a temperature lower than the solidification temperature and maintains a liquid state. In the disaster mat 1, the metal piece 31 is operated from the outside of the mat-shaped container 11 to release the supercooled state of the latent heat storage material. The size and number of the metal pieces 31 can be arbitrarily set within a range that does not affect the performance of the latent heat storage material 23. Considering the operability and cost of the metal piece 31, it is preferable to provide one metal piece 31 with a size that can be operated by hand in the disaster mat 1. The latent heat storage material composition 21 will be described later.

In the mat-shaped container 11, a heat storage material sealing portion 117 for sealing the latent heat storage material composition 21 is formed by a sealing portion 111 that seals the front surface and the back surface. The seal portion 111 includes an outer peripheral seal portion 112 provided along the outer shape of the mat-shaped container 11, and a first fold seal portion 113A and a second fold seal portion 113B that form creases. The disaster mat 1 can be folded in three in a bellows shape along the first fold seal portion 113A and the second fold seal portion 113B.

At the boundary 119 between the sealing portion 111 and the heat storage material sealing portion 117, the non-linear portion 119a is formed in an arc shape, and the latent heat storage material composition 21 is uniformly distributed over the entire boundary 119. The outer peripheral seal portion 112 is provided along the outer shape of the square mat-shaped container 11, and a pair of long sides 112a and 112b and a pair of short sides 112c and 112d are connected via the corner portion 112e. The corner portion 112e is provided in an arc shape. Further, the seal portion 111 is provided with a connecting portion 114 in which the first fold seal portion 113A and the second fold seal portion 113B are connected to the outer peripheral seal portion 112 in an arc shape.

The radius of curvature of the corner portion 112e and the connecting portion 114 is preferably set in the range of 1% or more and 10% or less of the length of any one side of the square mat-shaped container 11. This is because the latent heat storage material composition 21 is circulated from the straight portion 119b of the boundary 119 to the non-straight portion 119a so as to be sufficiently spread over the entire boundary 119.

In the present embodiment, the corner portion 112e and the connecting portion 114 form a non-linear portion 119a. The pair of long sides 112a and 112b is an example of "opposing the first side and the second side". The first fold seal portion 113A and the second crease seal portion 113B are examples of a "crease seal portion" and a "plurality of crease seal portions".

The heat storage material sealing portion 117 is provided meandering by the first fold sealing portion 113A and the second fold sealing portion 113B.

That is, the first fold seal portion 113A and the second fold seal portion 113B are provided perpendicular to the pair of long sides 112a and 112b. As a result, the heat storage material encapsulation portion 117 is divided into three in the longitudinal direction, and is divided into a first division portion 117A, a second division portion 117B, and a third division portion 117C.

The first fold seal portion 113A and the second fold seal portion 113B are alternately connected to a pair of long sides 112a and 112b. That is, the first fold seal portion 113A has one end 113a connected to the long side 112a and the other end 113b not connected to the long side 112b. As a result, the first division portion 117A and the second division portion 117B communicate with each other via the first communication portion 117D provided between the first fold seal portion 113A and the long side 112b. One end 113a of the second fold seal portion 113B is connected to the long side 112b, and the other end 113b is not connected to the long side 112a. As a result, the second division portion 117B and the third division portion 117C communicate with each other via the second communication portion 117E provided between the second fold seal portion 113B and the long side 112a.

The first fold seal portion 113A and the second fold seal portion 113B are provided up to the middle of the pair of long sides 112a and 112b, respectively. As a result, when the disaster mat 1 is folded by the first fold seal portion 113A and the second fold seal portion 113B, the first communication portion 117D and the second communication portion 117E are arranged at diagonal positions. Therefore, it is easy to stabilize the folded state of the mat 1 for disasters.

The first fold seal portion 113A and the second fold seal portion 113B have a width W1 of the first division portion 117A, a width W2 of the first communication portion 117D, a width W3 of the second division portion 117B, and a second communication portion 117E. The width W4 and the width W5 of the third division portion 117C are provided so as to have a constant width. Therefore, the heat storage material sealing portion 117 is continuously provided by the outer peripheral seal portion 112, the first fold seal portion 113A, and the second fold seal portion 113B in a continuous manner. As a result, it is possible to ensure stability when the disaster mat 1 is folded or when the folded disaster mat 1 is stacked.

In the first fold seal portion 113A and the second fold seal portion 113B, the tip surface 113c of the other end 113b is formed in an arc shape, and the latent heat storage material composition 21 is formed around the tip surface 113c. The object 21 is easy to flow.

FIG. 2 is an enlarged cross-sectional view of part A of FIG. In the mat-shaped container 11, the transparent first resin sheet 11A forming the front surface and the transparent second resin sheet 11B forming the back surface are sealed by the sealing portion 111, whereby the first resin sheet 11A and the second resin sheet 11A are sealed. A heat storage material sealing portion 117 is formed between the 11B and the heat storage material. As the sealing method of the sealing portion 111, any one of high frequency welding, heat welding, and ultrasonic welding is desirable. The front surface and the back surface are formed of the resin material in consideration of heat resistance, weather resistance, and reactivity with the latent heat storage material composition 21. The material of the mat-shaped container 11 is, for example, PVC (polyvinyl chloride), PP (polypropylene), PE (polyethylene), PET (polyethylene terephthalate).

As described above, in the disaster mat 1, both the front surface and the back surface second of the mat-shaped container 11 are formed of a resin material capable of transmitting sunlight, so that sunlight can be emitted even in a folded state. It is directly absorbed by the latent heat storage material composition 21 by penetrating from the uppermost surface to the lowermost surface or passing through the first and second communication portions 117D and 117E which are folds. Further, since the front surface and the back surface are formed of a transparent material, it is easy to find the metal piece 31 in the latent heat storage material composition 21 colored in black.

Since the non-linear portion 119a of the boundary 119 is formed in an arc shape, the latent heat storage material composition 21 wraps around the non-linear portion 119a of the boundary 119 from the linear portion 119b of the boundary 119 during the liquid phase. Can flow. Therefore, the latent heat storage material composition 21 spreads the first transparent sheet 11A and the second transparent sheet 11B to the vicinity of the boundary 119 and spreads over the entire heat storage material encapsulation portion 117 to increase the thickness near the boundary 119. The thickness of the central portion S can be approached.

However, it is physically impossible to make the thickness of the latent heat storage material composition 21 sealed in the heat storage material sealing portion 117 completely the same up to the boundary 119.

Therefore, in the disaster mat 1, a colored portion 121 colored in a color (black in the present embodiment) that promotes absorption of sunlight is formed in a predetermined range W11 from the boundary 119 to the heat storage material sealing portion 117 side. .. The predetermined range W11 is a range that covers a region where the thickness of the latent heat storage material composition 21 sealed in the heat storage material sealing portion 117 changes in the vicinity of the boundary 119. As a method of coloring the coloring portion 121, the mat-shaped container 11 itself may be colored, or the latent heat storage material composition 21 may be sealed in the mat-shaped container 11 and then colored. Further, for example, an adhesive tape having a color such as black that promotes absorption of sunlight may be attached to the mat-shaped container 11 to provide the coloring portion 121. Further, for example, the coloring portion 121 may be provided by applying a gradation such that the brightness of the black on the boundary 119 side is lowered and the brightness is increased in proportion to the increase in the thickness of the latent heat storage material composition 21.

The colored portion 121 is formed along the boundary 119 between the first resin sheet 11A forming the front surface and the second resin sheet 11B forming the back surface. The colored portion 121 may be formed on only one of the front surface and the back surface, but by forming the coloring portion 121 on both sides, the first fold seal portion 113A and the second fold seal portion 113B are folded by either mountain fold or valley fold. Also, the colored portion 121 can be directed toward the sun, and the heat storage defect due to the thickness of the heat storage material near the boundary 119 can be improved. Further, even when the sunlight transmitted through the disaster mat 1 is reflected and the disaster mat 1 is retransmitted, the sunlight can be collected near the boundary 119 by the coloring portion 121.

The disaster mat 1 may be provided with a display portion indicating the heat storage state of the latent heat storage material composition 21 on the surface of the mat-shaped container 11. The display unit is, for example, a sticker or a sheet that allows the surface temperature level of a general-purpose product to be confirmed by color, and may be attached to the surface of the mat-shaped container 11. The temperature of the mat-shaped container 11 is substantially the same as that of the latent heat storage material composition 21 of the contents. Therefore, the heat storage state of the latent heat storage material can be confirmed from the display state of the display unit. The display unit may be formed by coloring the mat-shaped container 11 with a paint, dye, or the like that allows the surface temperature level of a general-purpose product to be confirmed by color.

<Examples of using mats for disasters>
FIG. 3 is a diagram showing a usage example of the mat 1 for disasters. The disaster mat 1 is used when warmth is required. The disaster mat 1 is used, for example, in a disaster shelter in winter when the heating equipment is not perfect.

In use, first, as shown in FIG. 3A, heat is stored in the latent heat storage material composition 21 of the mat 1 for disasters by using Sorakka 51. The heat storage method of the disaster mat 1 will be described later. Even if the heat storage is completed, the latent heat storage material composition 21 maintains the supercooling function until the metal piece 31 is operated, and does not dissipate heat.

As shown in FIG. 3B, in the disaster mat 1 that stores heat in the latent heat storage material composition 21, for example, the user operates the metal piece 31 from the outside of the mat-shaped container 11 before going to bed to generate latent heat. The supercooled state of the heat storage material 23 is released. As a result, the latent heat storage material 23 of the mat 1 for disasters begins to dissipate heat. For example, the disaster mat 1 is placed between the mattress 13 laid on the cardboard bed 12 and the comforter 14, and the heat released from the latent heat storage material 23 warms the inside of the bed. The inside of the bed is heated to around 34 ° C., which is a comfortable bed temperature, for example.

Since the supercooled state of the disaster mat 1 can be released by operating the metal piece 31, the user can start heat dissipation to the latent heat storage material at any time, not only before going to bed.

The disaster mat 1 not only warms the inside of the bed, but also hits the user's feet and abdomen as shown in FIG. 3 (c) to locally localize the part where the user needs warming. Can be warmed up. As described above, the disaster mat 1 can be used repeatedly by absorbing energy such as sunlight again in the latent heat storage material after heat dissipation and storing the heat.

As described above, the disaster mat 1 of the present embodiment can be used repeatedly by efficiently collecting the energy of sunlight by using the solar bacca 51 and storing the heat in the latent heat storage material composition 21 without using a power source. Therefore, the mat 1 for disasters can be expected to improve the evacuation environment by appropriately warming the bedding and the like to smoothly guide the person to fall asleep even in the evacuation shelter where the heating equipment is not perfect in winter.

<Latent heat storage material composition>
FIG. 4 is a schematic view showing the constituent components of the latent heat storage material composition 21. The latent heat storage material composition 21 is, for example, the latent heat storage material composition disclosed in JP-A-2020-12084. Briefly, the latent heat storage material composition 21 contains the latent heat storage material 23 which is an inorganic salt hydrate as a main component, and the additive 28 for adjusting the state or physical properties of the latent heat storage material 23 is 2 in the present embodiment. It is a physical property prepared by blending seeds (melting point adjusting agent 24, coloring agent 25) and adjusted to a melting temperature of 30 to 58 ° C. The latent heat storage material 23 is an inorganic salt hydrate containing at least one of an acetate or a sulfate, and heat storage or heat dissipation thereof is performed by utilizing the inflow and outflow of latent heat accompanying a phase change.

Of the two types of additives 28, the first additive is a colorant having a pigment that develops a color that promotes absorption of sunlight (for example, black, a dark color such as brown that is infinitely similar to black). 25. The second additive, which is an additive 28 different from the colorant 25, is a melting point adjusting agent 24 that adjusts the melting temperature of the latent heat storage material composition 21. The latent heat storage material 23 of the present embodiment 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 solid substance that is easily soluble in water at a hydration number of 3, a molecular weight [g / mol] of 136.08, a melting point of about 58 ° C., and a temperature lower than the melting point.

The melting point adjusting agent 24 is a substance that contains at least a substance belonging to sugar alcohols mainly used as a food additive and has a physical property of generating negative heat of dissolution by dissolution with the latent heat storage material 23. In the present embodiment, the “substance having physical properties that generate negative heat of fusion” means that when the melting point adjusting agent 24 dissolves in the latent heat storage material 23, the melting point adjusting agent 24 absorbs heat from the outside and absorbs heat. Defined as a reaction occurring.

In the present embodiment, glycerin, which can serve as both a melting point depressant and a thickener, is used as the melting point adjusting agent 24. Glycerin is added to sodium acetate trihydrate having a melting point of about 58 ° C. in the range of 10 wt% or more and 30 wt% or less. Within this range, the latent heat storage material composition 21 to which glycerin is added can adjust the melting point to about 40 ° C., and the hardness at the time of solidification is relaxed to a softness that can be deformed according to an external force. Instead of glycerin, a melting point regulator and a thickener may be individually blended in the latent heat storage material 23.

The colorant 25 is a liquid carbon dye containing carbon as a main component, and is a substance having a property of not chemically reacting with the melting point adjusting agent 24 including the latent heat storage material 23. Further, the colorant 25 is a non-hazardous substance, non-toxic, highly safe, has excellent heat resistance, and is a dye that can be colored in a stable state without deterioration even in a use environment exposed to direct sunlight. The colorant 25 may be a powdery dye in addition to the liquid dye as in the present embodiment, and its properties are particularly limited as long as it is a dye that can color the entire latent heat storage material composition 21. is not it.

Unlike the latent heat storage material 23, the colorant 25 does not have heat storage characteristics, and therefore is added in a range of more than 0 wt% and 1 wt% or less. If the amount of the colorant 25 added is within this range, the latent heat storage material composition 21 to which the colorant 25 is added is significantly lower than the heat storage amount of the latent heat storage material 23 alone, even when compared in the same volume. Can be suppressed. In addition, if the colorant 25 is blended in the latent heat storage material composition 21 in such an added amount, the entire latent heat storage material composition 21 is uniformly colored black, which is the color of the pigment of the colorant 25. This is because it can be sufficiently colored.

When the latent heat storage material composition 21 is in a liquid phase state, the colorant 25 is dispersed in the melt of the latent heat storage material 23. On the other hand, when the latent heat storage material composition 21 is in the solid phase state, the colorant 25 is dispersed in the crystal grain boundaries of the latent heat storage material 23. Therefore, the latent heat storage material composition 21 is always colored black by the colorant 25. In the disaster mat 1 in which the latent heat storage material composition 21 is sealed in the mat-shaped container 11, the front surface and the back surface are colored black by the latent heat storage material composition 21, but in the thin portion, the surface is colored black. Since the amount of the colorant 25 dispersed is reduced, the hue becomes lighter and approaches gray.

<About heat storage method>
FIG. 5 is a diagram illustrating a heat storage method. As shown in FIG. 5A, for example, by folding the first fold seal portion 113A of the disaster mat 1 in a mountain fold and folding the second fold seal portion 113B in a valley fold, the disaster mat 1 is made into a bellows shape. Fold.

In the disaster mat 1, the first fold seal portion 113A and the second fold seal portion 113B are formed up to the middle between the long sides 112a and the long sides 112b of the outer peripheral seal portions 112, respectively, so that the heat storage material is enclosed. The first communication section 117D and the second communication section 117E for communicating the first to third divided sections 117A to 117C of the section 117 are provided. The thickness of the first communication portion 117D and the second communication portion 117E becomes thicker than that of the first fold seal portion 113A and the second fold seal portion 113B by encapsulating the latent heat storage material composition 21.

The first fold seal portion 113A and the second fold seal portion 113B are alternately connected to the long side 112a and the long side 112b. Therefore, when the disaster mat 1 is folded, the thick first communication portion 117D and the second communication portion 117E are arranged at diagonal positions and are not biased to either one of the long sides 112a and 112b. Therefore, the disaster mat 1 is stably folded in a state where the first division portion 117A, the second division portion 117B, and the third division portion 117C are stacked vertically without spreading in a fan shape. In the folded disaster mat 1, the contact area between the first divided portion 117A, the second divided portion 117B, and the third divided portion 117C becomes wider, and the heat transfer efficiency becomes higher.

As shown in FIG. 5B, the folded disaster mat 1 is stacked on another folded disaster mat 1 and placed in a transparent bag 61. A group of disaster mats placed in the transparent bag 61 is arranged at a predetermined position 52 of the solar bacca 51. The transparent bag 61 may be a transparent box or the like as long as it is a container made of a resin material capable of transmitting sunlight.

Sorakka 51 is a commercially available product that is relatively easy to obtain. Therefore, for example, the Sorakukka 51 can be stockpiled and handed to the disaster victim as a set of the disaster mat 1 and the Sorakukka 51 in the event of a disaster. In addition, Sorakka 51 is convenient because it can also be used for cooking foodstuffs.

The Sorakka 51 is formed by assembling a cardboard 53. Therefore, the Sorakka 51 can be folded into a small size and stored when not in use, and is less likely to get in the way in, for example, an evacuation shelter where the living space is limited. In addition, since the corrugated cardboard Sorakka 51 is lightweight, anyone can easily handle it.

The solar backer 51 includes a plurality of panel portions 55 so as to surround the predetermined position 52. The panel portion 55 has a three-dimensional orientation with respect to the predetermined position 52 so that the energy of the sunlight can be efficiently collected at the predetermined position 52 without changing the direction of the solar backer 51 according to the position and altitude of the sun. The direction is different. The shapes, positions, and orientations of the plurality of panel portions 55 may be different from those of the present embodiment.

In each panel portion 55, the inner surface 55a located on the inner side (predetermined position 52 side) is formed of a glossy mirror surface. For example, the inner surface 55a is formed by sticking a thin aluminum sheet 54 on the surface of the cardboard 53. As a result, the solar bacca 51 has a high reflection efficiency of sunlight at each panel portion 55, and can efficiently collect sunlight at a predetermined position 52. The surface of the predetermined position 52 may also be formed with a glossy mirror surface. According to this, the sunlight transmitted through the disaster mat group 1 is reflected at the predetermined position 52, and it is possible to pass through the disaster mat group 1 again and store heat in the latent heat storage material 23.

The Sorakka 51 is installed outdoors or indoors in a sunny place, for example, with the predetermined position 52 on which the disaster mat 1 is arranged facing south. At this time, it is advisable to fix the sorakukka 51 so that the sorakukka 51 does not fall down due to wind or the like. The sunlight not only directly irradiates the disaster mat 1 arranged at the predetermined position 52, but also reflects off the inner surface 55a of the panel portion 55 and indirectly irradiates the disaster mat 1.

The inner surface 55a of the panel portion 55 is formed of a glossy mirror surface. Therefore, the sunlight reaches the disaster mat group 1 group without losing almost any energy when reflected by the inner surface 55a. Therefore, the disaster mat group 1 can obtain the same energy as the sunlight directly hitting from the sunlight reflected on the inner surface 55a.

The disaster mat 1 is a black-colored latent heat storage material composition 21 enclosed in a transparent mat-like container 11, and has a black surface. Therefore, the disaster mat 1 can easily collect the energy of sunlight directly.

The sunlight that hits the disaster mat 1 passes through the transparent mat-shaped container 11 and enters the latent heat storage material composition 21. The latent heat storage material 23, which is the main component of the latent heat storage material composition 21, is colorless and transparent like water at room temperature. The black colorant 25 is widely dispersed in the liquid latent heat storage material 23. Therefore, the sunlight transmitted through the uppermost surface of the mat-shaped container 11 is absorbed by the colorant 25 dispersed in the latent heat storage material 23, and travels between the latent heat storage materials 23. The latent heat storage material 23 absorbs the energy of sunlight and stores heat.

The total height of the disaster mat 1 is increased by folding the bellows. The front surface and the back surface of the mat-shaped container 11 of the disaster mat 1 are made of a transparent material. Therefore, for example, the sunlight transmitted through the surface of the first division portion 117A sequentially passes through the first division portion 117A, the second division portion 117B, and the third division portion 117C, and the energy is absorbed by the latent heat storage material 23. .. Further, the sunlight transmitted in the vicinity of the first communication portion 117D and the second communication portion 117E also passes through the second division portion 117B, the third division portion 117C, and the like, and the energy is absorbed by the latent heat storage material 23. Further, the sunlight reflected from the predetermined position 52 sequentially retransmits the third divided portion 117C, the second divided portion 117B, and the first divided portion 117A, and the latent heat storage material 23 absorbs the energy. Therefore, by arranging the folded disaster mat 1 in the sorakukka 51, the distance through which the sunlight collected by the sorakukka 51 passes through the disaster mat 1 becomes longer, and the latent heat storage material 23 of the disaster mat 1 becomes available. Heat can be stored efficiently. The total height of the disaster mat 1 is further increased by stacking it on another disaster mat 1, so that this effect becomes more remarkable.

In the disaster mat 1, since the non-linear portion 119a (corner portion 112e, connecting portion 114) of the boundary 119 is formed in an arc shape, the latent heat storage material composition 21 has a non-linear portion 119a of the boundary 119. It is widespread enough. Therefore, the thickness in the vicinity of the boundary 119 is brought closer to the central portion S of the first to third divided portions 117A to 117C, and the hue near the boundary 119 becomes darker and closer to black. Therefore, in the disaster mat 1, the latent heat storage material composition 21 near the boundary 119 can store heat to the same extent as the latent heat storage material composition 21 in the central portion S, and uneven heat storage is suppressed.

Even if the color tone near the boundary 119 is lighter than that of the central portion S, in the disaster mat 1, the black colored portion 121 is formed along the boundary 119, so that the energy of sunlight passes through the colored portion 121. It is collected near the boundary 119. In the disaster mat 1, the latent heat storage material 23 near the boundary 119 absorbs the energy of sunlight collected by the coloring portion 121 and stores heat. Therefore, in the disaster mat 1, the latent heat storage material composition 21 near the boundary 119 stores heat to the same extent as the latent heat storage material composition 21 in the central portion S of the first to third divided portions 117A to 117C, and heat is stored. Unevenness is suppressed.

The area of the disaster mat 1 that comes into direct contact with the air is reduced by folding or stacking the mats 1 in a bellows manner. Therefore, the heat dissipation loss during heat storage of the disaster mat 1 is reduced. Further, the disaster mat 1 is not only the energy of sunlight, but also the heat energy transferred between the first to third divided portions 117A to 117C and between the stacked other disaster mats 1. The heat can be stored in the latent heat storage material composition 21. Therefore, the heat storage time of the disaster mat 1 is shortened by storing heat in the folded state.

By adjusting the installation position and orientation of the Sorakka 51 according to the position and altitude of the sun, it is possible to efficiently irradiate a group of mats for disasters with sunlight. According to this, in the disaster mat group 1, the latent heat storage material 23 continues to efficiently absorb the energy of sunlight, and the heat storage time is shortened.

In the Sorakka 51, the orientation of the inner surface 55a of the panel portion 55 is three-dimensionally different from the predetermined position 52. Therefore, after the user installs the Sorakka 51 in the south direction, it is necessary to change the direction of the Sorakka 51 according to the movement or altitude of the sun until the heat storage of the latent heat storage material is completed. The mat 1 can store heat in the latent heat storage material 23. That is, since the disaster mat 1 only needs to store heat up to a temperature exceeding the melting point of the latent heat storage material 23, it is not necessary to diligently change the orientation of the sorakukka 51 as in the case of cooking foodstuffs.

When the heat storage of the disaster mat 1 is completed, the user removes the disaster mat 1 group from the sorakukka 51, and folds and puts away the sorakukka 51. The disaster mat 1 that has completed heat storage is stored in a storage place in a folded state as it is. The disaster mat 1 becomes compact when folded and does not get in the way during storage.

The disaster mat 1 uniformly stores heat in the entire latent heat storage material composition 21. Therefore, the latent heat storage material composition 21 near the boundary 119 does not start heat dissipation until the metal piece 31 is operated.

For example, when the disaster mat 1 that stores heat during the day is used to warm the bed or the like at night, the user unfolds the folded disaster mat 1 and operates the metal piece 31. When the metal piece 31 is operated, the disaster mat 1 releases the supercooling of the latent heat storage material 23 and starts heat dissipation. In the disaster mat 1, the heat storage material sealing portion 117 has a communication portion 117. Therefore, if one metal piece 31 is operated, the supercooled state of the latent heat storage material composition 21 is gradually released, and in the event of a disaster. Heat can be dissipated from the entire mat 1.

When the heat is stored again in the disaster mat 1 used in this way, the user reassembles the solar accca 51 and stores the heat in the used disaster mat 1 in the same manner as described above. For example, even if the Sorakka 51 is repeatedly used in an evacuation site and damaged, since it is made of cardboard 53, anyone can easily repair it with an adhesive tape or the like. Further, by using a commercially available product for the sorakukka 51, it is easy to replace the damaged sorakukka 51 with another sorakukka 51.

<About heat storage performance evaluation test>
A test for evaluating the heat storage performance of the disaster mat 1 will be described. For the test, a disaster mat 1 having a square outer shape of 210 mm in length, 300 mm in width, and 10 mm in thickness was used. In the mat-shaped container 11 of the mat 1 for disasters, a non-linear portion 119a (corner portion 112e and connecting portion 114) of the sealing portion 111 is formed in an arc shape having a radius of curvature of 20 mm. The latent heat storage material composition 21 was colored black by adding 1 wt% of a liquid carbon dye to _{sodium acetate trihydrate (CH 3} COONa · 3H _{2 O).} Further, glycerin was added to sodium acetate trihydrate in the range of 10 wt% or more and 30 wt% or less to adjust the melting point of the latent heat storage material composition 21 to 45 ° C.

FIG. 6 is a diagram illustrating a mounting position of a button battery type thermometer (hereinafter abbreviated as “thermometer”) in a heat storage performance test. As shown in FIGS. 6A and 6B, the first thermometer T1 is attached to the surface SA1 of the first division portion 117A, and the second thermometer T2 is attached to the second thermometer T2 with respect to the disaster mat 1 to be evaluated. It was attached to the back surface SB2 of the division portion 117B, and the third thermometer T3 was attached to the front surface SC1 of the third division portion 117C. As shown in FIG. 6C, the temperature of the front surface SA1 of the first division 117A is measured using the first thermometer T1, and the back surface SA2 and the back surface SA2 of the first division 117A are measured using the second thermometer T2. The temperature of the back surface SB2 of the two divisions 117B was measured, and the temperatures of the surface SC1 of the second division 117B and the surface SC1 of the third division 117C were measured using the third thermometer T3. For the first to third thermometers T1 to T3, a button battery type ultra-compact temperature data logger "Super Thermocron" manufactured by KN Laboratory was used.

FIG. 7 is a table showing performance test conditions. As the Sorakka 51, a mirror-finished inner surface 55a was used. As the solar furnace 51, "cardboard solar cooker Ver.9.3" manufactured by Kyowa Cardboard Co., Ltd. was used. In the test, on a sunny day, the bellows-folded disaster mat 1 was placed in a transparent bag 61 and placed at a predetermined position 52 of the saw racker 51, and the saw racker 51 was placed on a concrete-covered ground facing south. ..

The initial temperature of the disaster mat 1 at the start of the test was 22 ° C. The test started at 10:30 and finished heat storage at 13:45, 3 hours and 15 minutes later. The average outside air temperature during heat storage was 23 ° C., the average humidity was 21% RH, and the average amount of solar radiation was 760 W / m ² . After the heat storage was completed, the mat 1 for disaster was naturally cooled in a folded state. When the temperature of each measurement point measured by the first to third thermometers T1 to T3 dropped to 32 ° C., the metal piece 31 of the disaster mat 1 was operated to start heat dissipation. In the test, the temperature at each measurement point was measured using the first to third thermometers T1 to T3 from the start of heat storage to the heat dissipation.

FIG. 8 is a graph showing the performance test results. The left vertical axis of FIG. 8 shows temperature (° C.) and humidity (% RH), the right vertical axis shows the amount of solar radiation (W / m ² ), and the horizontal axis shows time. The temperature of each measurement point of the disaster mat 1 reaches the melting point of 45 ° C. (see the reference line M in the figure) of the latent heat storage material composition 21 within 1 hour and 9 minutes after the heat storage starts at 10:30. did. The temperature at each measurement point rose to about 70 ° C. and became stable. As shown in the shaded area P2 in the figure, the latent heat storage material composition 21 at each measurement point stores heat in a region exceeding the melting point (reference line M). At the end of heat storage, the temperature at each measurement point is almost the same. From this, it was demonstrated that heat can be stored in the latent heat storage material composition 21 even when the disaster mat 1 is folded.

In the disaster mat 1, the temperature rise rate of the back surface SB2 of the second division portion 117B was large after the start of heat storage. This is the sunlight transmitted through the front surface SA1 of the first division portion 117A, the sunlight reflected at the predetermined position 52 and transmitted through the back surface SC2 of the third division portion 117C, and reflected by the panel portion 55 of the solar panel 51. It is probable that the sunlight transmitted through the 1st and 2nd communication portions 117D and 117E was transmitted through the surface SB2 of the 2nd division portion 118B, and the latent heat storage material 23 around the surface SB2 absorbed a large amount of solar energy. Further, it is considered that the second division portion 117B is sandwiched between the first division portion 117A and the third division portion 117C, and heat dissipation loss is unlikely to occur.

It should be noted that the heat storage time of the disaster mat 1 was shorter when the heat was stored in the folded state than when the heat was stored in the unfolded state. It is considered that this is because the first to third divided portions 117A to 117C absorb heat energy due to heat transfer and store heat by folding.

When the disaster mat 1 for which heat storage was completed was cooled at room temperature while being folded, the temperature at each measurement point dropped to 32 ° C. about 1 hour and 20 minutes after the heat storage was completed. The rate of temperature change during cooling at each measurement point was about the same. If there is uneven heat storage, heat dissipation is started from the place where the heat storage is poor before operating the metal piece 31. However, in this test, heat dissipation was not started at any measurement point until the metal piece 31 was operated. From this, it is demonstrated that in the disaster mat 1, the latent heat storage material composition 21 near the boundary 119 stores heat to the same extent as the latent heat storage material composition 21 near the central portion S, and the heat storage unevenness is suppressed. Was done.

As shown in P3 in the figure, when the disaster mat 1 naturally cooled to 32 ° C. was spread and the metal piece 31 was operated, the temperature at each measurement point rose to the melting point. The rate of change in temperature rise after the start of heat dissipation at each measurement point was about the same. From this, it was demonstrated that the supercooled state of the latent heat storage material composition 21 can be uniformly released even if only one metal piece 31 enclosed in the mat-shaped container 11 is operated.

At each measurement point, when the temperature rises to the melting point, the temperature gradually drops due to heat dissipation. The rate of temperature decrease after reaching the melting point at each measurement point is about the same. From this, it was demonstrated that the mat 1 for disaster has no uneven heat storage and the latent heat storage material composition 21 dissipates heat uniformly.

As described above, in the disaster mat 1 of the present embodiment, of the boundary 119 between the heat storage material sealing portion 117 and the sealing portion 111, the non-linear portion 119a is formed into an arc shape, so that the vicinity of the boundary 119 is formed. Is brought closer to the thickness of the central portion S of the first to third divided portions 117A to 117C. As a result, the mat 1 for disasters becomes a color (black) that promotes absorption of sunlight up to the vicinity of the boundary 119 by the latent heat storage material composition 21 enclosed in the transparent mat-like container 11, and heat storage due to the difference in hue. Unevenness is reduced. Further, the mat-shaped container 11 is provided with a colored portion 121 colored in a color that promotes absorption of sunlight along a boundary 119 on at least a surface (first transparent sheet 11A) formed of a transparent material. Even when the shade near the boundary 119 colored by the latent heat storage material composition 21 is lighter than the central portion S of the first to third divided portions 117A to 117C, the sunlight to the latent heat storage material composition 21 near the boundary 119 is emitted. Absorption can be complemented by the coloring section 121. As described above, according to the disaster mat 1 of the present embodiment, heat can be uniformly stored in the latent heat storage material composition 21 enclosed in the mat-shaped container 11, so that uneven heat storage can be suppressed and heat can be stored with high efficiency. can do.

The present invention is not limited to the above embodiment, and can be appropriately modified without departing from the gist thereof. For example, instead of the metal piece 31, an anticooling agent may be blended in the latent heat storage material 23. The anti-supercooling agent is, for example, anhydrous disodium hydrogen phosphate (Na ₂ HPO ₄ ).

For example, in the embodiment, the heating tool is a disaster mat 1 used in a shelter life due to a natural disaster, but the heating tool is, for example, an outdoor heating mat used outdoors such as camping. As long as it is a product that warms up by utilizing heat radiation from the latent heat storage material composition 21 of the present invention, it is not limited to the embodiment and may be anything.

If the metal piece 31 can be found from the outside of the mat-shaped container 11, the front surface may be formed of a transparent material and the back surface may be formed of a non-transparent material. However, as in the above embodiment, by forming both the front surface and the back surface with a resin material that allows sunlight to pass through, even if the mat 1 for disasters is folded, the latent heat storage material composition enclosed in the mat-shaped container 11 Sunlight can be transmitted to the entire object 21.

The latent heat storage material composition 21 may not store heat in a supercooled state. In this case, the metal piece 31 may be omitted. However, as in the above embodiment, if the latent heat storage material composition 21 can store heat in the supercooled state and the supercooled state can be released by the metal piece 31, the heat storage mat 1 for disasters can be stored at an arbitrary timing. Heat dissipation can be started.

The mat-shaped container 111 may have a shape other than a square shape such as a circle or a polygon. However, the square shape of the mat-shaped container makes it easier to stabilize the folded state.

The radius of curvature of the non-linear portion 119a may not be set in the range of 1% or more and 10% or less of the length of any one side of the mat-shaped container 11. However, with such a configuration, the non-linear portion 119a can be formed into a gentle arc shape. As a result, the latent heat storage material composition 21 can be easily distributed over the entire boundary 119 including the non-linear portion 119a, the thickness near the boundary 119 is brought close to the thickness of the central portion S, and the color of the heat storage material sealing portion 117 is changed to the sun. The color (black) that promotes the absorption of light can be made uniform, and uneven heat storage can be suppressed.

The heat storage material sealing portion 117 does not have to be continuously provided. However, as in the above embodiment, when the heat storage material sealing portion 117 is continuously provided by the outer peripheral sealing portion 112 and the first and second fold sealing portions 113A and 113B, the mat 1 for disaster is folded. Alternatively, stability when the folded disaster mats 1 are stacked can be ensured.

The first fold seal portion 113A and the second fold seal portion 113B may not be provided. However, by providing the first fold seal portion 113A and the second fold seal portion 113B as in the above embodiment, the mat 1 for disaster can be easily folded. Further, the number of crease seal portions may be 1 or 3 or more depending on the size and folding method of the disaster mat 1. Further, the crease seal portion does not have to be provided in parallel.

The first fold seal portion 113A and the second fold seal portion 113B may be connected to the long sides 112a and 112b of the outer peripheral seal portion 112, respectively. However, as in the above embodiment, one end 113a of the first fold seal portion 113A and the second fold seal portion 113B is connected to the outer peripheral seal portion 112, and the other end 113b is not connected to the outer peripheral seal portion 112. The supercooled state of the entire latent heat storage material composition 21 can be released by one metal piece 31. As a result, the number of metal pieces 31 can be reduced and the cost can be reduced.

The first fold seal portion 113A and the second fold seal 113B may be connected only to the long sides 112a, and may not be connected to the opposite long sides 112a and 112b alternately. Further, the first fold seal portion 113A and the second fold seal portion 113B may exceed the middle of the long sides 112a and 112b facing each other. However, as in the above embodiment, the first fold seal portion 113A and the second fold seal 113B are alternately connected to the long sides 112a and 112b, and are provided up to the middle of the long sides 112a and 112b to provide the mat 1 for disaster. The latent heat storage material composition 21 at the fold is not biased to either the long side 112a or 112b, and the folded state is stable. Since the front surface and the back surface of the mat-shaped container 11 of the disaster mat 1 are transparent, sunlight permeates the entire latent heat storage material composition 21 even in the folded state. Therefore, according to the disaster mat 1 of the above embodiment, heat can be stored stably and efficiently.

The disaster mat 1 may be installed in the Sorakka 51 in an unfolded state to store heat. In this case as well, the sunlight collected by the solar accca 51 at the predetermined position 52 is efficiently absorbed by the latent heat storage material composition 21 near the boundary 119 of the mat 1 for disasters, so that the heat storage efficiency can be improved while suppressing the heat storage unevenness. Can be improved.

Instead of putting the folded disaster mat 1 in the transparent bag 61, the folded mat 1 may be placed at a predetermined position 52 of the saw racker 51 to store heat. However, as in the above embodiment, the disaster mat 1 is put in the transparent bag 61 and an air layer is formed around the disaster mat 1, so that the disaster mat 1 is cooled by the outside air during heat storage. Can be suppressed.

For example, as shown in FIG. 9, by directly arranging the folded disaster mat 1 at a predetermined position 52 of the saw racker 51 and putting the saw rack 51 together in the transparent bag 71, the disaster mat 1 and the transparent bag 71 can be combined. An air layer 72 may be formed between the two. The transparent bags 61 and 71 may be used to form a double air layer around the disaster mat 1.

For example, as shown in FIG. 10, a folded disaster mat 1 is arranged at a predetermined position 52 of the assembled Sorakkakka 51, and the panel opening of the Sorakkakka 51 is formed by a sheet 91 made of a transparent material such as a food wrap film. By covering it, an air layer may be formed around the mat 1 for disasters. The disaster mat 1 may be placed in the transparent bag 61, and the panel opening of the solar bacca 51 may be covered with the sheet 91. In this way, by forming an air layer on the outside of the folded disaster mat 1 to prevent convection on the surface of the disaster mat 1 due to wind or the like, the disaster mat 1 can be used during heat storage. Heat is not easily taken away from the outside air, and heat can be stored efficiently.

The inner surface 55a of the solar backer 51 shown in FIG. 5B may not be formed of a glossy mirror surface. For example, the inner surface 55a may be formed with a matte mirror surface. However, since the inner surface 55a is a mirror surface, the reflectance of sunlight can be increased and the heat storage efficiency can be improved.

The Sorakka 51 may be made of a material other than corrugated cardboard, such as metal. However, by using a corrugated cardboard saw rack, the saw rack 51 is lightweight and inexpensive. The Sorakka 51 does not have to be an assembly type. However, by using the assembling type Sorakka 51, storage or stockpiling becomes easy.

1 Disaster mat (an example of warming equipment)
11 Mat-shaped container 21 Latent heat storage material composition (example of heat storage material)
111 Seal part 117 Heat storage material sealing part 119 Boundary 121 Colored part

Claims (5)

A heat storage material that contains a colorant that promotes the absorption of sunlight and can store heat in a supercooled state.
A mat-like container in which a heat storage material encapsulation portion for encapsulating the heat storage material is formed by a sealing portion that seals the front surface and the back surface, and at least the surface is made of a resin material capable of transmitting sunlight.
Have,
The mat-shaped container is
Of the boundary between the seal portion and the heat storage material encapsulation portion, a non-linear portion is provided in an arc shape.
At least the surface is provided with a colored portion colored in a color that promotes absorption of sunlight along the boundary.
A warming tool that features. In the heating device according to claim 1,
The heat storage material can store heat depending on the supercooled state.
It has a supercooling release member that is sealed in the heat storage material sealing portion together with the heat storage material and releases the supercooled state.
The sealing portion includes an outer peripheral sealing portion provided along the outer shape of the mat-shaped container and a crease sealing portion forming a crease of the mat-shaped container.
The heat storage material sealing portion is continuously provided by the outer peripheral seal portion and the crease seal portion.
A warming tool that features. In the heating device according to claim 2,
The mat-shaped container has a front surface and a back surface made of a resin material capable of transmitting sunlight, and has a square outer shape.
The outer peripheral seal portion is provided in a square shape along the outer shape of the mat-shaped container.
The crease seal portion is a plurality of crease seal portions provided perpendicular to the first side and the second side of the outer peripheral seal portion facing each other.
The plurality of crease seal portions are
The first side and the second side are connected alternately ,
A warming tool that features. A method for storing heat of a heating tool according to any one of claims 1 to 3, wherein the heat collecting tool stores heat.
By arranging the heat collecting tool at a predetermined position for heating the ingredients of Sorakka, heat is stored in the heat storage material.
A heat storage method for heating equipment. A method for storing heat of a heating tool according to claim 2 or 3, wherein the heat collecting tool stores heat.
To store heat in the heat storage material by arranging the heating tool in a folded state at a predetermined position for heating the ingredients of Sorakka.
A heat storage method for heating equipment.

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