JPH0346683Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a heating element structure for heating using the heat of hydration reaction of quicklime.

(Prior Art) Conventionally, methods and devices for heating food and drinks using the heat of hydration reaction of quicklime are well known. Methods for supplying water include direct immersion in water or injecting water, or a method in which a bag or container with water sealed in advance is built in and the reaction is started by puncturing it with a pin. There is.

Specifically, Utility Model Application Publication No. 55-28436, Utility Model Application Publication
59-159569, Japanese Utility Model Application Publication No. 59-162825, Japanese Utility Model Application Publication No. 59-162828, Japanese Utility Model Application Publication No. 60-94130, etc. disclose heating devices that heat food and drink through the hydration reaction of quicklime. Introduced.

(Problem to be solved) However, with the above-mentioned method of injecting water or supplying water using a water bag, it is difficult to uniformly supply water to the entire quicklime, and unreacted quicklime remains. There is. In particular, when the quicklime has a complicated structure, a large amount of unreacted quicklime remains, resulting in the problem that the food, drink, etc. to be heated does not reach the target temperature.

(Means for Solving the Problems) The inventors of the present invention have studied the above-mentioned problems and devised a method in which quicklime reacts uniformly.

That is, in the present invention, a binder mainly composed of quicklime is placed between two film layers glued together in a bag shape, and a resin film that is melted by the heat of the heating element is formed inside the film layer. This heating element structure is made by attaching a plurality of water-containing pouches arranged at regular intervals and adhering a heat insulating sheet to the outside of one of the film layers.

The present invention will be described below with reference to the drawings.

Among the film layers of the present invention, the film layer 1 in contact with the object to be heated is preferably one with excellent thermal conductivity, and metal foil such as aluminum foil, or a laminate of metal foil and resin film is used. Materials with excellent heat resistance and not easily torn are preferred; specifically, polyester, nylon,
Examples include films such as polypropylene.

The water-containing pouch 3 of the present invention does not need to be particularly limited in shape, but it must contain water in a stoichiometric ratio necessary for hydrating the exothermic agent whose main component is quicklime, and in which a plurality of pouches are arranged. It is also true.

The pouch 3 shown in Fig. 1 is an example in which a plurality of recesses are arranged in a thermoplastic resin film such as polyethylene, and after filling water, a resin sheet such as polyethylene is further attached to contain water. It shows.

Fig. 2 shows an example of a cylindrical structure, and Fig. 3 shows an example of a wavy structure containing water, but the shape is not particularly limited, and it is possible to use a plurality of independent pouches containing water. It's good to have.

The quicklime used in the present invention is preferably in the form of fine granules or powder and has a high hydration rate; for example, lime that heats up to over 100°C within 1 minute after contacting water is particularly preferred.

The quicklime is filled uniformly in the form of a sheet as shown in Fig. 1, but when the heating element structure of the present invention is used in an upright position, there is a risk that the quicklime will be unevenly distributed.
By tightening with a fastener 5 made of resin or fiber as shown in the figure, it can be used in any location.

The heat insulating sheet used in this invention is indispensable in order to efficiently utilize the heat generated by the hydration reaction of quicklime without dissipating it, and to make it possible to hold it in the hand when it generates heat. A heat insulating sheet made of urethane, styrene foam, ethylene foam, inorganic sponge, etc. is suitable. Attachment to the film layer is carried out using an adhesive, hot-heat adhesive, double-sided tape, or the like.

(Effect of the invention) The heating element structure of the invention can continue the hydration reaction one after another by tearing or crushing some of the water-filled sachets with a pin, Also, since it is sheet-like and deformable, it can be used to heat canned foods and bag-shaped foods and drinks. or,
In the heating element structure of the present invention, the reaction occurs throughout without leaving any unreacted quicklime, so the temperature can be raised efficiently.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a heating element structure showing an embodiment of the present invention, and FIGS. 2 and 3 are plan views of water-containing pouches having different shapes. In the figure: 1 is a film layer, 2 is quicklime, 3 is a water-containing pouch, 4 is a film layer, 5 is a stopper, and 6 is a heat insulating sheet.

Claims (1)

[Scope of utility model registration request] A heating agent mainly composed of quicklime 2 is placed between two film layers 1 and 4 adhered in a bag shape, and a resin film is formed inside the film layer which is melted by the heat of the heating element. A heat generating element structure in which a plurality of water-containing pouches 3 are arranged and attached at regular intervals, and a heat insulating sheet 6 is adhered to the outside of one of the film layers.