JPH022363Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Field of industrial application] This invention is a device that can be used to warm up the local parts of the body,
This invention relates to a small portable far-infrared hand warmer suitable for heating affected areas of the body to obtain physical medical effects.

[Conventional technology]

Heat generation means for conventional hand warmers include rapid combustion methods using oxygen, liquid fuels such as benzine and alcohol, or solid fuels such as hand warmer ash, and slow combustion methods using chemical agents. There is a method of generating reaction heat through chemical reactions. All of these systems use oxygen in the air to increase fuel efficiency and heat generation efficiency per unit weight.

There are also electric heating types, but since all of the energy to generate heat must be supplied from batteries etc., they are heavier and heavier than systems that use chemical reaction heat using oxygen. The heat generation efficiency is poor, making it unsuitable for use as a portable pocket warmer.

However, in skin diving and other underwater work, combustion type hand warmers that consume oxygen cannot be used, and electric hand warmers that use batteries are desired.

In an electric hand warmer, a limited energy source, such as a battery, is used to continuously apply extremely small amounts of electricity to the heating wire for as long as possible, and the extremely small amount of heat generated there warms the body. It is necessary to use it efficiently.

In other words, like a traditional hand warmer, the generated heat is stored together with the heated air in highly heat-retaining clothing, and the stored heat is transmitted to the body through the air and clothing. Heating is not practical because the heat transfer efficiency is too low.

Furthermore, in the electric heating type, when the area of the heat generating part is increased, localized high temperature points are not generated as in the combustion type, and therefore it is not suitable for using heated air for heat transfer.

[Problem that the invention attempts to solve]

From the above-mentioned viewpoint, a pocket warmer has been proposed that efficiently warms the body by converting electrothermally generated heat into far infrared rays.

In a pocket warmer that uses far infrared rays, a flat heating element with resistance wire arranged flatly is used to heat a far infrared ray emitting film that emits far infrared rays, and one side of the far infrared rays emitting film, for example, the front, is heated. Used for bodies that require

However, a heated far-infrared ray emitting film not only emits far-infrared rays in the direction that requires heating;
It also emits far-infrared rays in the opposite direction.

Furthermore, the planar heating element itself also emits infrared rays, and the direction of the radiation is also toward the surface opposite to the direction in which the far-infrared ray emitting film is located, which requires heating.

The infrared rays emitted from this far infrared ray emitting film and the planar heating element in directions other than those required heat members in that direction that do not require heating, resulting in far infrared ray conversion efficiency that is used to heat the body, etc. It is causing a decline in

[Means for solving problems]

In the present invention, there is provided a flat heating element in which a heating wire is supported flatly on an insulating substrate, a far infrared ray emitting film facing the flat heating element and heated conductively, and a far infrared ray emitting film facing the far infrared ray emitting film. The above-mentioned problem can be solved by housing a heat insulating material that insulates the back side of the flat heating element from the front side in a bag-like covering and providing an infrared reflective film between the flat heating element and the insulating material. has been resolved.

〔Example〕

1 to 3 show one embodiment of the present invention, FIG. 1 is a perspective view seen from the back side which is the outside to the human body during use, and FIG.
It is a perspective view seen from the front side facing a human body.

The planar heating element 1 is housed in a bag-like covering 3 with a heat insulating material 2 overlaid on the back side.

An aluminum foil film is adhered to the surface of the relatively thick sponge-like heat insulating material 2 on the side of the flat heating element 1 to form an infrared reflective film 4.

A far-infrared radiation film 5 is provided on the front surface of the flat heating element 1.

The front sheet 3a of the bag-like covering 3 is made of a flexible, transparent synthetic resin sheet, and the back sheet 3b is made of a flexible, opaque synthetic resin sheet. Periphery 3 of sheets 3a, 3b
c, 3d, 3e, and 3f are heat-sealed into a bag shape.

As shown in FIG. 3, the planar heating element 1 includes a foil-like resistance wire 6 laminated in close contact with an insulating substrate 1a.
Furthermore, an insulating thin film 1b is tightly laminated on the resistance wire 6, and a far-infrared radiation film 5 is further applied thereon.

In the far-infrared radiation film 5, when the flat heating element 1 is heated by electricity supplied from a power source such as a battery, the Zeal heat generated in the flat heating element 1 is thermally conductively interposed through the insulating thin film 1b. Heat.

The far-infrared radiation film 5 emits infrared rays in an amount corresponding to the heating temperature from both sides of the film surface toward the front and the back.

The far infrared rays emitted in the front direction pass through the transparent front sheet 3a and heat the local parts of the body that are exposed to the front surface.

The wavelength of the infrared rays emitted from the far infrared radiation film 5 is far infrared rays of 2 μm to 10 μm, and the far infrared rays of this wavelength are directly absorbed by the skin and subcutaneous part of the human body.
Warms the human body directly.

This far-infrared heating does not directly heat the air, so no heat is lost through the air, and the thermal efficiency of warming the human body is extremely high.

The heat insulating material 2 provided on the back surface of the planar heating element 1 adiabatically holds the planar heating element 1, thereby increasing the heat storage effect of the planar heating element 1 and attempting to obtain a high thermal equilibrium temperature. When the planar heating element 1 reaches thermal equilibrium at a high temperature, the far-infrared radiation film 5 is heated to a high temperature to increase the amount of far-infrared radiation.

On the other hand, both insulating sheets 1a and 1b of the flat heating element 1
is thin and highly transparent, and the line width W and line pitch P of the foil film-like resistance wire 6 are almost equal, and the area occupied by the resistance wire 6 is approximately 50%. Approximately 50% of the area of the flat heating element 1 is transparent.

As a result, approximately 50% of the far infrared rays emitted from the far infrared ray emitting film 5 toward the rear side are emitted toward the heat insulating material 2 through the planar heating element 1.

Furthermore, the resistance wire 6 itself emits infrared rays, and this infrared ray is also radiated toward the heat insulating material 2 side.

In the conventional far-infrared hand warmer, as described above, far-infrared rays and infrared rays emitted from the flat heating element 1 side to the heat insulating material 2 side are absorbed on the surface of the heat insulating material 2, and heat the heat insulating material 2.

This heating by infrared rays is applied to the insulating material 2 according to the amount of absorbed infrared rays, regardless of the temperature of the insulating material 2.
The amount of thermal energy generated by heating the heat insulating material 2 with this infrared rays reduces the amount of far infrared rays emitted from the front side of the far infrared radiation film 5.

In other words, when the power applied to the planar heating element 1 is constant, the power at the thermal equilibrium point is the radiant energy of far infrared rays in the front direction, the radiant energy in the back direction, and the heat conductive heating of the surrounding air and objects. To increase the amount of far infrared rays in the front direction, the amount of heat radiated thermally,
Also, the amount of infrared rays absorbed in the back direction should be reduced as much as possible.

Regarding the infrared rays absorbed in the back direction, the conventional thermally conductive heat insulating material 2 has no effect of blocking energy from the infrared rays.

In the embodiment of the present invention, an infrared reflective film 4 is provided on the surface of the heat insulating material 2 in contact with the planar heating element 1 by pasting a metal foil film, for example, an aluminum stretched foil film. Infrared reflective film 4
The far infrared rays and infrared rays emitted in this direction are reflected in the direction of the radiation source.

A substance that easily emits infrared rays or the like is also a substance that easily absorbs infrared rays of the same wavelength. Therefore, the reflected infrared light emitted by itself is mainly absorbed by its emitting surface.

In this way, the far infrared rays and infrared rays emitted to the back side are less likely to be absorbed by other substances, and are substantially equivalent to no radiation.As a result, the far infrared rays and infrared rays emitted to the back side The thermal equilibrium point of the infrared radiation film 5 is raised to increase the amount of far infrared rays radiated to the front side.

[Other Examples]

The infrared reflecting film 4 may be provided as a vapor-deposited aluminum film on the surface of the heat insulating material 2.

The infrared reflecting film 4 can be formed by attaching a metal foil film, for example, an aluminum stretched foil film, to the back surface of the flat heating element 1, or by pasting a metal foil film, for example, an aluminum evaporation film. It may be provided.

[Effect of idea]

As described above, according to the present invention, even if the electric power supplied to the planar heating element 1 is extremely small, there is little heat dissipation due to thermal conduction, and energy loss due to infrared radiation toward the back side is minimized. A high thermal equilibrium temperature is obtained for the flat heating element 1 and the far-infrared radiation film 4, and most of the energy radiation related to the thermal equilibrium is radiated in the front direction as far-infrared rays, thereby achieving far-infrared conversion efficiency with high energy utilization efficiency. Obtainable.

This converts the power supplied from a power source with limited capacity, such as a battery, into far infrared rays that are easily absorbed by the body, and provides it to the body without wasting it.
An electric hand warmer that can warm the body for a long time is provided using a small capacity dry cell battery, a small rechargeable battery, or the like.

Furthermore, the hand warmer according to the present invention is not limited to being used as a general hand warmer, but can also be used for physical therapy that involves infrared heating of local parts of the body, or for keeping or heating articles warm.

Furthermore, since the hand warmer according to the present invention is an electric heating type that does not use oxygen, it can be used, for example, when working underwater.
It can be used under a wetsuit.

[Brief explanation of the drawing]

The figure shows an embodiment of the present invention.
2 is a partially cutaway perspective view seen from the back, FIG. 2 is a partially cutaway perspective view seen from the front, and FIG. 3 is a sectional view taken along the line -- in FIG. 1. 1...Flat heating element, 1a...Insulating substrate, 1b
... Insulating film, 2 ... Heat insulating material, 3 ... Bag-like covering, 3a ... Front sheet, 3b ... Back sheet, 3c, 3d, 3e, 3f ... Periphery, 4 ... Infrared reflective film, 5... Far-infrared emitting film, 6... Resistance wire.

Claims (1)

[Claims for Utility Model Registration] (1) A flat heating element in which two insulating transparent films are brought into close contact with each other, and a linear electric heating element is supported flatly between the two transparent films. , supported on a film surface on one front side of the flat heating element,
Infrared rays are emitted from the electric heating element through a far-infrared radiation film that is conductively heated by the electric heating element, and a portion of the transparent film that is provided facing the film surface on the other back side of the flat heating element and in which the transparent films are in close contact with each other. , an infrared reflective film that reflects and irradiates the far infrared rays emitting film on the front side, an insulating material provided on the back side of the infrared reflective film to insulate heat transfer toward the back side, and a transparent front side, A far-infrared hand warmer comprising: a bag-like covering body containing the above-mentioned items; (2) The far-infrared hand warmer according to claim (1), wherein the infrared reflective film is a metal foil adhered to the inner surface of a heat insulating material that insulates the back side of the flat heating element. (3) The far-infrared hand warmer according to claim (2), wherein the infrared reflecting film is an aluminum foil film. (4) The far-infrared hand warmer according to claim (1), wherein the infrared reflecting film is a vapor-deposited metal film provided on the back surface of the flat heating element. (5) The far-infrared hand warmer according to claim (4), wherein the infrared reflecting film is a vapor-deposited aluminum film.