JPH1099363A - Heating pad device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to dispense with special protective machines, such as controllers, for temp. control and to maintain the entire area of a heating surface at a uniform temp. by connecting a power source to a surface heating element dispersed with conductive fillers into a high-polymer matrix and cladding this surface heating element with sheath members. SOLUTION: The heating pad device A is constituted by forming the planar surface heating element 1 consisting the high-polymer matrix dispersed therein with the conductive fillers, such as carbon black, connecting a power source, such as AC power source or DC battery, to the surface heating element 1 by a power source cord 2 and cladding both surfaces of the surface heating element 1 with the sheath members 3. A far IR radiation plate 4 which radiates far IR rays by the heat from the surface heating element 1 is mounted at the front surface of the surface heating element 1. As a result, the wavelength of the electromagnetic waves from the far IR radiation plate and the wavelength of the far IR rays possessed by the body induce a resonance phenomenon and the internal heating of the lesion of the body is effectively executed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating pad device used for efficiently heating an affected part, promoting a sweating action and relieving fatigue.

[0002]

2. Description of the Related Art Conventional heating pad devices include a device utilizing a chemical reaction such as a disposable body warmer and a device utilizing an electric heating wire such as a nichrome wire or an etching heater wire.

The former utilizing the chemical reaction eliminates the need for a power source for heating and has a simple structure, but it cannot control the heating temperature, so that it may become too hot. Therefore, the same temperature could not be maintained for a long time, and it was difficult to use only for instantaneous heating.

[0004] Further, in the case of using the latter heating wires such as a nichrome wire and an etching heater wire, not only a protection device such as a controller for suppressing an unnecessary rise in temperature is required, but also the protection device is broken. If there is an error between the set temperature of the protection device and the actual temperature, there is a risk of abnormal heat generation. Also, even if a large number of heating wires are densely arranged so that there is no temperature difference between the location where the heating wire generates heat and the location where the heating wire is not provided, any portion of the heating surface In this case, it was very difficult to make the same temperature. Also, particularly when the temperature is low, it takes a lot of time for the heating wire to warm up. Also, although the heating wire has a certain degree of flexibility,
It was not possible to cope with a sharp bend, resulting in breakage and limited use of the body.

[0005]

SUMMARY OF THE INVENTION In view of the above situation, the present invention is intended to solve the problem without requiring a special controller or other protective device for temperature control.
In addition, the heating surface can be maintained at a uniform temperature over the entire area, the rising time can be shortened, and further, the heating pad does not cause damage and the use position is not limited. The point is to provide a device.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an electroconductive polymer such as carbon black in a polymer matrix so that a resistance value can be increased or decreased by a temperature change to control an electric current. A heating pad device is formed from a sheet heating element formed by dispersing a conductive filler, a power supply connected to apply a voltage to the sheet heating element, and a jacket member covering the sheet heating element. Configured. Therefore, when a power supply voltage is applied to the sheet heating element, electrons move between the conductive fillers such as carbon black, so that a current flows between the conductive fillers. The above-mentioned energized state is maintained until. Generally, when the temperature is higher than the set temperature, the resistance value increases under a constant voltage condition, the current value decreases according to Ohm's law, the heat generation of the sheet heating element is suppressed, and the temperature is lower than the set temperature. When the voltage is constant, the resistance value decreases under the condition of a constant voltage, the current value increases according to Ohm's law, the heat generation of the sheet heating element is promoted, and a part of the body in contact with the body through the jacket member is warmed. Can be During this heat generation, for example, when a part of the body part in contact with the jacket member rises in temperature from the other part and reaches the set temperature, the part of the planar heating element corresponding to the part is heated. By increasing the resistance value of the portion, the heat generation of the portion of the planar heating element is suppressed, but since the other portions have not yet reached the set temperature, the heating of the planar heating element until the set temperature is reached. Fever is promoted. Moreover, since carbon black is an infinite number of particles of amorphous carbon having a diameter of about 3 to 500 nm, the distance between the particles of carbon black is very small, and the distance that electrons move by applying a voltage is very short. In addition, the energizing time for energizing between carbon black particles can be greatly reduced, and the same temperature can be set at any point on the heating surface of the planar heating element. And uniform heating can be performed. Even if the planar heating element configured as described above is bent, the carbon black is a granular substance, so that the energized state is not prevented between the carbon blacks.

[0007] Since a far-infrared radiation plate that emits far-infrared rays by the heat from the planar heating element is attached to the surface of the planar heating element, the object to be heated, that is, the inside of the body can be heated in a shorter time. can do.

An inorganic material that emits far-infrared rays by the heat from the sheet heating element is printed or kneaded on the surface of the sheet heating element. Heating can be performed in a shorter time, and a configuration that emits far-infrared rays can be provided, but the sheet heating element can be configured to be thinner.

[0009]

FIG. 1 shows a heating pad apparatus A according to the present invention. This heating pad device A has a plate-like planar shape formed by dispersing a conductive filler such as carbon black in a polymer matrix so that the resistance can be increased or decreased by a temperature change to control the current. Heating element 1
And a power cord 2 for connecting the sheet heating element 1 to a power supply such as an AC power supply or a DC battery, and a jacket member 3 covering both surfaces of the sheet heating element 1.
When connecting to the AC power supply, a transformer or the like for lowering the voltage is provided. Further, the DC battery may be composed of a rechargeable secondary battery or a case incorporating a plurality of batteries.

A far-infrared radiating plate 4 for radiating far-infrared rays on the surface of the planar heating element 1 by heat from the planar heating element 1
The wavelength of the electromagnetic wave emitted from the far-infrared radiation plate 4 and the wavelength of the far-infrared ray of the body induce a resonance phenomenon, so that the inside of the object to be heated, that is, the affected part of the body can be effectively heated. And promotes sweating,
Relieving fatigue can be achieved in a short time. The far-infrared radiating plate 4 is formed of ceramic powder or zeolite powder in which a temperature of 39 ° C. or higher and an electromagnetic wave of 6 μm to 20 μm are effectively generated, in a plate shape. Alternatively, the far-infrared radiation plate 4 may be omitted, and an inorganic material that emits far-infrared rays may be printed or kneaded on the surface of the sheet heating element 1 as shown in FIG. In this case, the thickness of the entire heating pad device A can be reduced, and the sheet heating element 1 can be configured to be flexible, so that the use location of the sheet heating element 1 is not limited. There are also benefits that can be done. Alternatively, as shown in FIG. 2, the surface heating element 1 may be attached to one surface of the jacket member 3 for implementation.

As described above, the sheet heating element 1 is made of a composite conductive material in which a conductive filler such as carbon black, graphite, metal powder or the like is dispersed in an electrically insulating polymer matrix. By using conductive fillers such as graphite and metal powder, in the case of a heating pad device using a nichrome wire, there is a time loss until the energized state over the entire length of the nichrome wire, but no time loss The rise time can be shortened, and the same temperature can be maintained at any position on the heat generating surface. FIG. 3 shows particles B such as carbon black constituting the planar heating element 1. This figure shows a case where particles B are present at intervals S, and the shorter the interval S, the faster the speed of electron movement and the faster the current flows, and FIG. FIG. 5 shows a state in which the particles B are arranged in a dense state, and FIG. 5 shows a state in which the particles B are randomly arranged instead of the aligned state as shown in FIGS. The polymer matrix is made of polyethylene glycol, phenol phenol, or the like, and the polymer matrix and the conductive filler are formed as a plate-shaped planar heating element 1 made of a flexible conductive resin with a binder. ing. Then, by changing the concentration of the conductive filler with respect to the polymer matrix, the maximum heat generation temperature of the sheet heating element 1 can be changed. The maximum heat generation temperature is set between 30 ° and 80 °, but may be set to a temperature other than this temperature. The current value when the planar heating element 1 reaches the set temperature is reduced to 25% to 35% as compared with the time when the energization is started, so that power is consumed to compensate for heat dissipation.

FIG. 6 shows the results of a comparative test of the surface temperature of the sheet heating element 1 configured as described above. As a comparison, a heating pad device of a thermostat control system of Company A and a heating pad device of a thermostat control system of Company B were used. As shown in the drawing, the surface temperature was about 55 ° in each case. As shown in the figure, in the case of the sheet heating element 1, as shown by the solid line, when the temperature rapidly rises to about 55 ° C. in about 10 minutes after energization, a constant temperature is maintained thereafter. Shown) and B
By turning on and off the power supply with a thermostat with both companies (indicated by the dashed line), 70 ° C to 55 ° C
The surface temperature changes over a wide range. As described above, the sheet heating element 1 does not greatly deviate from the set temperature as compared with the case where the power is turned on and off by the thermostat. In particular, there is no fear of heating or firing when the temperature rises from the set temperature, and further, it is possible to eliminate the need for a control device such as a thermostat and to maintain a stable temperature.

FIG. 7 shows the power consumption characteristics of the planar heating element 1 configured as described above. As shown in the figure, in the heat generation temperature characteristic a, after the surface temperature has reached about 55 ° (set temperature), the temperature has not been controlled to increase the surface temperature as in the thermostat control method, and the temperature has decreased. Since only the current flows on the surface of the part only,
As shown in the power consumption characteristic b, it is possible to suppress an increase in power consumption. In other words, after reaching a surface temperature of about 55 ° (set temperature), substantially constant power is consumed, and It is possible to save power.

[0014]

According to the first aspect, by using a bendable plate-like planar heating element formed by dispersing a conductive filler such as carbon black in a polymer matrix, a conventional heating element is provided. The current can be accurately controlled with a simple configuration without using a protective device (control device) such as a special controller such as a thermostat, and the heating surface can be maintained at a uniform temperature over the entire area. The rise time can be shortened, and further, care must be taken in handling so as not to cause damage to the nichrome wire when using the conventional nichrome wire, and the use position is limited. Can be provided at once.

According to the second aspect, by attaching the far-infrared ray radiating plate to the surface of the sheet heating element, the inside of the object to be heated can be warmed in a short time, so that the sweating action is promoted and the fatigue is reduced. Can be made more advantageous to relieve the

According to the third aspect, similarly to the second aspect, the inside of the object to be heated can be heated in a short time,
It can be more advantageous for promoting the sweating action and relieving fatigue, and can further reduce the size of the configuration for far-infrared radiation, thereby reducing the size of the entire heating pad device. .

[Brief description of the drawings]

FIG. 1 is a partially cutaway plan view of a heating pad device.

FIG. 2 is a perspective view showing another embodiment of the heating pad device.

FIG. 3 is a sectional view showing an example of a sheet heating element.

FIG. 4 is a cross-sectional view illustrating an example of a sheet heating element.

FIG. 5 is a sectional view showing an example of a sheet heating element.

FIG. 6 is a graph showing surface temperature characteristics of a heating pad device.

FIG. 7 is a graph showing power consumption characteristics.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 sheet heating element 2 power cord 3 outer cover member 4 far-infrared radiation plate A heating pad device B particle S interval a heat generation temperature characteristic b power consumption characteristic

Claims (3)

[Claims] 1. A sheet heating element formed by dispersing a conductive filler such as carbon black in a polymer matrix so that a current can be controlled by increasing or decreasing a resistance value according to a temperature change. A heating pad device comprising: a power source connected to apply a voltage to the sheet heating element; and a jacket member covering the sheet heating element. 2. The heating pad device according to claim 1, wherein a far-infrared radiation plate that radiates far-infrared rays by heat from the planar heating element is attached to a surface of the planar heating element. 3. The heating pad device according to claim 1, wherein an inorganic material that emits far-infrared rays by heat from the planar heating element is printed or kneaded on the surface of the planar heating element.