JPS6377445A - Supercooling type heat accumulator - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to the field of utilizing a reusable heat storage body capable of storing thermal energy in a supercooled state and extracting the stored thermal energy when necessary.

Conventional technology 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 output at a constant temperature. Attempts have been made to use it. However, most of the conventional heat storage bodies have been attempts to use heat storage materials that prevent supercooling.

That is, the heat storage material is of a type that starts releasing heat at the same time as heating (heat storage) is completed. Therefore, it was not possible to dissipate heat when necessary, and its uses were limited. However, recently attempts have been made to utilize the supercooling phenomenon to extract heat from a heat storage material at any time. That is, JP-A-61-
A supercooled heat storage body and a means for destroying supercooling are described in JP-A No. 14283 or Japanese Patent Laid-Open No. 1020-1983.

However, when this supercooled heat storage body is used in a heating device or the like, there are the following problems. That is, the heat storage material is flexible because it is a liquid during heat storage (when supercooled), but when heat is released, it becomes solid and loses its flexibility. This tendency becomes stronger when it becomes solid and the temperature decreases. As a heating device, loss of flexibility is fatal. In order to solve this problem, conventional heat storage materials that prevent supercooling were
As disclosed in Japanese Utility Model Publication No. 276 or Japanese Utility Model Application Publication No. 57-85154, parts of flexible sheets are joined together to form a plurality of small chambers, a heat storage material is sealed in the small chambers, and heat storage material is heated by refraction of the joined portion. Attempts have been made to provide flexibility. However, in the case of a supercooled heat storage body, a means to collapse the supercooling is required in order to extract heat, and this means is described in the above-mentioned Japanese Patent Application Laid-Open No. 61.14283 or Japanese Patent Application Laid-open No. 60-1020. It is necessary to give them a stimulus that makes them feel like they are doing something. This kind of stimulation means was developed in 1988.
It was practically difficult to provide each of the plurality of small chambers described in Japanese Utility Model Publication No. 5154 or Japanese Utility Model Application Publication No. 57-8726. That is, when extracting heat, it is necessary to stimulate each chamber one by one, and the stimulation means itself feels strange to the body.

Problems to be Solved by the Invention The present invention attempts to solve the problems with the heat storage body. In other words, when a heat storage body capable of supercooling is used in a heating device, etc., it can easily store heat, conveniently, easily and reliably destroy the supercooling of the entire device and extract heat.
It is flexible and does not cause discomfort when worn on the body.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention has provided a plurality of small chambers by joining film or tube sheets at appropriate points, and in which the small chambers can be supercooled and changed from liquid to solid by stimulation. A heat storage body that undergoes a phase change and releases latent heat is enclosed, and a capillary body is provided between the small chambers.

Function: Due to the above structure, the present invention can easily and reliably extract heat from the heat storage material, and can provide a flexible heat storage body. That is, the heat storage body has a structure in which a heat storage material that can be supercooled and whose supercooled state is easily destroyed by stimulation is sealed in small chambers, and each small chamber is connected by a capillary body. Since this capillary body is in contact with the heat storage material in each small chamber, the heat storage material is sucked up into the capillary body by capillary phenomenon. That is, the capillary body is impregnated with the heat storage material. Therefore, although the heat storage body is divided into a plurality of small chambers, the heat storage material is substantially continuous throughout the heat storage body. Now, when a stimulus is applied to the stimulation part provided in one of the small chambers of the storage material, supercooling breaks down in this part and the heat storage material begins to change phase without releasing latent heat from liquid to solid.

This supercooling collapse spreads throughout the chamber containing the stimulation area. Then, the supercooling of the heat storage material in the capillary body collapses, and further the supercooling of the heat storage material in the adjacent chamber collapses. In this way, the collapse of supercooling spreads to the entire village of the heat storage body. That is, when the supercooling of the heat storage material in one small chamber collapses, it spreads to the small cells of the entire heat storage material through the capillary body. In order to provide flexibility in the supercooled heat storage body of the present invention, joints are provided in the heat storage body, and even if the heat storage material is distributed into a plurality of small chambers,
The supercooling of the heat storage material in all the small chambers that make up the heat storage body can be destroyed by stimulation at one point.

Examples Examples of the present invention will be described below. FIG. 1 is a plan view of a heat storage body 1 of the present invention, and FIG. 2 is a sectional view. The heat storage body 1 is divided into a plurality of small chambers 4 by joints 3 obtained by heat-sealing appropriate parts of a film or tube 2.

This small chamber 4 is sealed with a heat storage material 5 that can be supercooled, changes its phase from liquid to solid upon stimulation, and releases latent heat. Furthermore, the chambers 4 are interconnected by capillary bodies 6. A stimulation lower is also provided to break up supercooling.

Each element will be explained below. The container 2 is made of a material that is non-reactive and incompatible with the heat storage material 5. The joint can be made by heat-sealing a pair of sheets, by folding one sheet and heat-sealing two sheets (top and bottom), or by heat-sealing appropriate parts such as tubes. can get. In addition to heat fusion bonding, adhesive bonding may also be used. Especially when used in a heating device, an aluminum laminate film is preferable because flexibility is required. The case where two sheets are used will be described below. The small chamber 4 is surrounded by a joint 3, and can have any size and shape depending on the purpose of use. Heat storage material 5 is calcium chloride hexahydrate, sodium sulfate decahydrate, sodium thiosulfate pentahydrate, acetic acid) IJ
It is a hydrated salt type heat storage material such as um trihydrate, and can easily be brought into a supercooled state when heated and cooled to above its melting point. Further, the heat storage material 5 may be mixed with a thickener, a stabilizer, or a thermally conductive substance, if necessary. The capillary body 6 is a fibrous body made of a material that is non-reactive and incompatible with the heat storage material 6, such as natural fibers such as cotton and cellulose, polyester, acrylic,
It is made of a thread-like body made of synthetic fiber such as nylon or aromatic polyamide, a woven or non-woven fabric, a thin metal wire body made of stainless steel, copper, etc., or various open-celled bodies. Heat sealing is performed by sandwiching the capillary body 6 between two seals 2, and after heat sealing, the capillary body 6 is tightly attached and fixed to the container material. The capillary body 6 must be able to withstand the heat during heat sealing, and must not melt and become integral with the sheet 2 material during heat sealing. This is because when the capillary body 6 melts and becomes integrated with the material of the sheet 2, the capillary force is no longer present, and the molten liquid of the heat storage material 5 no longer penetrates, and the collapse of supercooling is interrupted.

For example, when the innermost layer (fusion layer) of the laminate film is made of polyethylene, threads of cotton, polyester, polyamide, etc. are preferable. The position and method of attaching the capillary body are not particularly limited, as long as the chambers can be connected via the joint 3.

The stimulating part 7 is a part that stimulates the heat storage material in a supercooled state. The method of applying stimulation may be the method described in the above-mentioned publication, or it may be a method of providing a capillary body on the outside of the container via a packing and directly applying stimulation to the heat storage material oozing into this part.

A specific example will be shown below.

A thread made of polyester is sandwiched between two aluminum laminate films whose innermost layer is made of polyethylene, and a thread made of polyester is sandwiched as a capillary body, and a joint part with a width of 5 m is provided around a 5 x 5 m square chamber by heat sealing.

For this heat sealing, capillary bodies are arranged in advance so that all the small chambers can be connected to other small chambers at least at one point by the capillary body. This small chamber was filled with 20 grams of sodium acetate trihydrate as a heat storage material, and the other side was sealed under reduced pressure.

In this way, a heat storage body having 4 cells per row and 8 cells in total in 2 rows was created. A stimulus opening was installed in one of the small chambers of this heat storage body, and the plug was sealed with a rubber stopper to prevent the heat storage material from leaking outside. This heat storage body is made of sodium acetate trihydrate, which has a melting point of 58°C.
When the heat storage material was heated to a higher temperature of 80° C. to completely melt and then cooled to room temperature, the heat storage material easily became supercooled.

A stress of 150 to 9 was applied to one of the heating chambers, but since the flow of the heat storage material was extremely limited by the capillary body, the heat storage material did not move to other chambers and cause uneven thickness. Ta. When this supercooled heat storage body was covered with a heat insulating material and the heat storage material was stimulated with a needle through the rubber stopper of the stimulation port, the supercooling collapsed and heat was released from the entire heat storage body. When worn on the human body and used in an atmosphere of 0°C, heat output of 40°C or more was generated on the surface of the human body for about 2 hours. Furthermore, when worn, the device could be easily bent around the joint, providing comfortable heating without any discomfort. Also,
The heat storage-heat release cycle was repeated 100 times without any problem.

Effects of the Invention As described above, the heat storage body of the present invention provides the following effects.

That is, the heat storage body of the present invention is formed from a plurality of small bags filled with a heat storage material, and each pouch is connected by a capillary body containing the heat storage material, so that there is no stimulation port for breaking down the supercooled state. Only one is enough, which simplifies the configuration and eliminates the discomfort caused by the stimulation port when worn on the body. Furthermore, when worn on the human body, the joints connecting the pouches bend and easily follow external stress, so the user hardly feels any discomfort.

Furthermore, since the heat storage material in the small chamber and the heat storage material in the small chamber are connected by a capillary body, even if a large pressure is applied to some of the small chambers, the flow of the heat storage material will be blocked by the capillary body and it will not move to other small chambers. There is no. Therefore, uneven thickness does not occur in the heat storage body.

As described above, according to the structure of the heat storage body of the present invention, the supercooled state can be easily broken down and heat can be taken out, and since the heat storage body has flexibility, it can be made into a heat storage body that does not give a strange feeling.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a heat storage body according to an embodiment of the present invention, and FIG. 2 is a sectional view of the same side. 1... Heat storage body, 2... Sheet, 3...
...joint, 4...small chamber, 5...
Heat storage body, 6... Capillary body, 7... Stimulation port. Agent's name: Patent attorney Toshi Nakao Male Idiot 1 person 1-
舊认讯本DO-KUKURUMUGO COFFEE; 9-F. J--te joint part 6-Kebanoyu body 7-type 1 soukou Fig. 2

Claims (2)

[Claims] (1) A joint obtained by gluing appropriate parts of a film or tube, a plurality of small chambers separated by this joint, and a supercoolable liquid sealed in the small chamber that changes from liquid to solid by stimulation. a heat storage body that changes and releases latent heat; a capillary body that is provided at the joint and extends between the small chambers;
A supercooled heat storage body comprising a stimulation part that collapses the supercooled state of the heat storage material. (2) The supercooled heat storage body according to claim 1, wherein the film is made of a flexible aluminum laminate film.