JPS6251399B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a heat storage device used for body warming.

Structure of conventional example and its problems As shown in FIG.
It was filled with a nucleating agent 3, a thickening agent 4, a good thermal conductive substance 5, and the like. Here, the role of the thickener 4 was to uniformly disperse and retain the nucleating agent 3 and the good heat conductive substance 5 in the heat storage material 2 for a long time. However, in the above configuration, the specific gravity of the commonly used nucleating agent 3 and good thermal conductive material 5 is greater than the specific gravity of the heat storage material 2, so if heat storage and heat release are repeatedly used, the substantial effect of the thickener 4 decreases. Eventually, the nucleating agent 3 and the good heat conductive material 5 would settle down and separate, causing a problem in that heat could not be released smoothly. This means that during heat dissipation, the crystals of the heat storage material 2 grow with the nucleating agent 3 as the core, but as mentioned above, when the nucleating agent 3 settles and separates, the crystals of the heat storage material 2 are more concentrated in that area. heat storage material 2 to container 1.
This is due to the fact that the entire outer surface of the container 1 cannot be effectively used as a heat transfer surface when heat is transferred to the outer surface. Also,
When the heat storage material 2 completes heat dissipation, it becomes a very strong lumpy material, so when considering the point of body warming, it restricts the movement of the body, and in some cases, it has the problem of damaging the container 1 due to external stress. Ta.

Purpose of the invention The present invention solves such conventional problems,
The objective is to obtain a heat storage component that has flexibility and can smoothly release heat.

Structure of the Invention In order to achieve this object, the present invention includes a heat storage material that receives and receives heat through repeated solidification and melting, and a medium that is incompatible with the heat storage material and generates almost non-volatility, inside a flexible container. , a heat storage material porous sheet containing at least a nucleating agent among a nucleating agent, a thickening agent, and a good thermal conductive substance and easily impregnated with the heat storage material; and a parent medium into which the heat transfer medium is easily impregnated. A nucleating agent is interposed between the laminated sheets.

With this structure, the nucleating agent, thickener if necessary, good thermal conductive substance, etc. can be reliably retained for a long period of time, and the medium-impregnated porous sheet can prevent the crystals of the heat storage material. It has the effect of subdividing and imparting slippage.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. In Fig. 2, a heat storage material 2 such as sodium acetate trihydrate (m.p 58°C) is placed in a flexible container 1 such as thin-walled polyethylene, and the heat storage material 2 is a heat storage material that is easy to impregnate. As the porous sheet 6, for example, Cellpore W-01 (trade name, manufactured by Sekisui Chemical KK), as the medium 7, for example, liquid paraffin, and as the media-philic porous sheet 8 that can be easily impregnated with the medium 7, for example, It stores Cellpore NW-01 (trade name, manufactured by Sekisui Chemical KK). Also,
A nucleating agent 3 such as sodium pyrophosphate decahydrate is held between the laminated layers of the heat storage material porous sheet 6 and the media-philic porous sheet 8. Note that the same members as in FIG. 1 are given the same numbers.

In the above configuration, heat storage is performed by heat supplied from the outer wall of the container 1, and the heat storage material 2 changes from solid to liquid. Subsequently, the heat radiated is sensible heat and latent heat of fusion released when the heat storage material 2 returns from liquid to solid, and is generated between the heat storage material porous sheet 6 and the medium-philic porous sheet 8. Crystallization begins using the intervening nucleating agent 3 as a core. At this time, the heat storage material 2 is large because the nucleating agent 3 is dispersed in the container 1 and the heat storage material 2 cannot penetrate into the media-philic porous sheet 8 impregnated with the medium 7. It does not become a strong crystal (solid). The melt (liquid) of the heat storage material 2 is divided by the media-philic porous sheet 8, crystallized, and efficiently releases sensible heat and latent heat of fusion. Moreover, the crystals of the heat storage material 2 in contact with the media-philic porous sheet 8 slide against external stresses such as load and bending, resulting in good flexibility at low temperatures. Furthermore, in the pinprick resistance test, since the heat storage material porous sheet 6 holds most of the heat storage material 2, leakage can be minimized.

Although the above example shows the case where only the nucleating agent 3 is held between the laminated sheets, if necessary, a thickener such as sodium polyacrylate can be used to further prevent liquid leakage. . Additionally, a material with good thermal conductivity such as graphite powder may be used to adjust the heat dissipation rate. In particular, graphite has high thermal conductivity, enables smooth heat storage and radiation, and has slipperiness, which further improves the slippage of the crystal planes described above.

Further, in the present invention, as shown in the examples, the heat storage material porous sheet 6 and the medium-philic porous sheet 8 are used by laminating each other, but the present invention is not limited to this. Furthermore, the laminated material is not limited to a sheet form, but may be a finely ground filler form.

Effect of the invention According to the heat storage body of the present invention, the following effects can be obtained.

(1) Nucleating agents, thickeners, good thermal conductive substances, etc. can be reliably held between the fiber sheets for a long period of time, allowing for stable heat storage and radiation.

(2) The parent heat transfer medium fiber sheet can fragment the crystals of the heat storage material at low temperatures and at the same time provide flexibility to improve the sliding between the crystals.

(3) Since the heat storage material fiber sheet attracts and retains most of the heat storage material, it is pinprick resistant and leakage can be minimized, improving safety.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional heat storage component, and FIG. 2 is a sectional view of a heat storage component showing an embodiment of the present invention. 2... Heat storage material, 3... Nucleating agent, 6... Heat storage material fiber sheet, 7... Heat transfer medium, 8... Heat transfer medium fiber sheet.

Claims (1)

[Claims] 1 Inside the flexible container, a heat storage material that transfers and receives heat through repeated solidification and melting, a medium that is incompatible with the heat storage material and is almost non-volatile, a nucleating agent, a thickener, and a heat generating agent. A heat storage material porous sheet that contains at least a nucleating agent among conductive substances and that is easily impregnated with the heat storage material and a media-philic porous sheet that is easily impregnated with the medium are laminated, and the laminated layer is provided. A heat storage device comprising at least a nucleating agent interposed between sheets.