JPH0747034B2 - Heat storage - Google Patents

Description

The present invention relates to a heat storage / retaining / heating device for a reusable heat storage body capable of storing energy in a supercooled state and taking out stored heat energy when needed. The present invention relates to a heat storage body used as a relatively small device.

Conventional technology Since latent heat storage materials that utilize latent heat have advantages such as a large amount of heat storage per unit weight and the ability to obtain a constant temperature output, cordless clothing warming equipment, warming equipment, and warming equipment. Attempts have been made to use the device.

Problems to be Solved by the Invention However, conventionally, most attempts have been made to use a heat storage material that prevents supercooling. That is, the heat storage material is of a type that starts radiating heat upon completion of heating (heat storage). Therefore, it was not possible to radiate heat when necessary, and the application was limited. However, recently, a method has been tried in which heat is taken out from the heat storage material at any time by utilizing the supercooling phenomenon. That is, Japanese Unexamined Patent Publication (Kokai) No. 61-14283 describes a supercoolable heat storage composition containing a heat storage material and hydroxypropylated guar gum as essential components. In this publication, a method is shown in which a heat storage composition is supercooled in a glass bottle and a seed crystal is added when heat is required, or a pointed metal rod is used as a stimulus to collapse supercooling and take out heat. There is. This method is considered to be effective for large-scale heat storage devices such as in the hot water supply field. However, when it is used in a small heat storage device such as a body warming device, it is always necessary to carry a single crystal, which causes problems such as loss or acquisition of a seed crystal. Also, when using a sharp metal rod, there are problems in terms of portability and safety.
Further, there is a concern that the heat storage material composition that cannot be opened and closed may leak and stain the surrounding area.

Further, Japanese Patent Application Laid-Open No. 61-22194 discloses a thermal energy storage device comprising an energy storage material and a stimulator. This publication shows a method in which a stimulator made of a seed crystal is physically brought into contact with an energy storage material in a supercooled state, and the supercooling is destroyed to extract heat energy. However, this method also has a practical problem when it is used in a small heat storage device. That is, it is necessary to thermally isolate the seed crystal in order to prevent the seed crystal from being melted by being heated (heat storage). However, when the device is small, this thermal isolation is difficult, and even if it is possible, the device is enlarged. In addition, it is difficult to reliably thermally isolate the seed crystal against external stimuli during movement such as carrying and heating under various environments.

The present invention is intended to solve the problems of the heat storage device. That is, when a supercoolable heat storage body is used in a small heat storage device such as a heat collecting device, a heat retaining device, or a heating device, heat can be easily stored, and supercooling can be conveniently and easily collapsed to extract heat. In addition, the heat storage material does not leak and contaminate the surrounding area.

Means for Solving the Problems In order to solve the above problems, the present invention seals a container with a heat storage material that is supercoolable and that changes phase from liquid to solid by stimulation and releases latent heat. A capillary body is provided so as to penetrate the portion so that the heat storage material and the capillary body can come into contact with each other.

Effect of the Invention With the above-described configuration, the present invention supercools the heat storage material sealed in the container, and when the heat storage material impregnated in the capillary body is stimulated, the supercooling collapses.

Example One example of the present invention will be described below. The figure shows the heat storage body of the present invention. This heat storage body is configured to include a container 2 having a lead-out portion 4 filled with a capillary body 3, a heat storage material 6, and an opening / closing mechanism 5 provided at the tip of the capillary body 3. Hereinafter, each element will be described. The container 2 is made of a material that is non-reactive and incompatible with the heat storage material 6. Especially when it is used for a heat collecting device, it is preferable to use an aluminum laminate film because it requires flexibility. The capillary body 3 is a fibrous body made of a material that is non-reactive and incompatible with the heat storage material 6,
It is made of an open-cell body or a combustor having open-cell bodies, and is closely filled inside the outlet 4. In the present embodiment, the opening / closing mechanism 5 is of a cap mounting type, but may be of a screw type so that it can be easily opened and closed. Further, in this embodiment, the space 7 is provided between the opening / closing mechanism 5 and the capillary body 3, but this is not always necessary. However, when the space 7 is not provided, the heat storage material 6 adheres to the opening / closing mechanism 5 and may cause a part of the heat storage material 6 to drop off during opening / closing or to obstruct sealing. Therefore, it is practically preferable to provide the space portion 7. Heat storage material 6 is calcium chloride hexahydrate, sodium sulfate
It is a hydrated salt type latent heat storage material such as decahydrate and sodium acetate trihydrate, and is a mixture of a thickener, a stabilizer, a heat conductive substance and the like as necessary. The heat storage material 6 easily contacts the capillary body 3 and is sucked up by the capillary tube to wet the opposite surface A of the capillary body 3 which is not in contact with the heat storage material 6.

The heat storage body having the above-mentioned configuration is heated (heat storage) in a sealed state by hot water or a heater. When the heat storage material 6 is sufficiently melted and then cooled to room temperature, a supercooled material of the heat storage material 6 is obtained. Although the reason is not clear in this state, the supercooled state does not collapse even if stress is applied to the heat storage body, folded, or applied with pressure. In order to take out the heat, the opening / closing mechanism 5 is opened and the sealed state is broken without contact with the outside,
The surface A of the capillary body 3 is gently stimulated with a thin leaf or a finger. Then, the supercooled state easily collapses and heat can be taken out.

A specific example will be described below.

A polyethylene pipe containing a polyethylene sintered body as a capillary is provided in a 100 mm x 120 mm aluminum laminated container by heat fusion. The polyethylene pipe is made to have a closed structure by a polyethylene cap. 40 g of sodium acetate trihydrate was vacuum-sealed in this container to obtain a heat storage body. A subcooled product can be easily obtained by immersing the heat storage material in 100 ° C hot water for 10 minutes to sufficiently dissolve the heat storage material and then cooling to room temperature. Supercooling did not collapse under any external stimulus in this state. In order to extract heat, the cap of the heat storage material was removed, and the surface of the polyethylene sintered body was gently stimulated with a match rod, and the supercooled state collapsed, and heat could be easily extracted. Hereinafter, the same operation was repeated 100 times, but the same result was obtained.

Effects of the Invention As described above, according to the heat storage body of the present invention, the following effects are obtained.

That is, since the heat storage body of the present invention does not have a seed crystal in the heat storage body, the whole heat storage body can be heated in a sealed state, and a supercooled state can be easily and surely created. Further, since the outside of the container and the heat storage material are separated by the capillary body, the heat storage body is less likely to leak from the container when opened. Further, since the surface of the capillary body is wet with the heat storage material, it is possible to surely collapse the supercooling by only opening the opening / closing mechanism section and gently stimulating the surface of the capillary body when heat is taken out.

Therefore, by using the heat storage body of this configuration, heat can be stored or released easily and safely anywhere.

[Brief description of drawings]

The figure shows a cross section of an embodiment of the heat storage body of the present invention. 2 ... container, 3 ... capillary body, 4 ... outlet, 5 ...
Opening / closing mechanism, 6 ... Heat storage material.

Claims (3)

[Claims] Claim: What is claimed is: 1. A container having an opening / closing mechanism capable of contacting with the outside air is filled with a heat storage material capable of being supercooled and undergoing a phase change from a liquid to a solid by an external stimulus to release latent heat. A heat storage body in which a capillary body is attached to the container so that the other end comes into contact with the heat storage material. 2. The heat storage body according to claim 1, further comprising a space portion between the opening / closing mechanism and the capillary body. 3. The heat storage body according to claim 1, wherein the heat storage container is a flexible container such as a laminated film.