JPH11214123A - Flat heater element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flat heater element capable of setting the temperature of an arbitray part only to a higher temperature than that of the other parts. SOLUTION: In a flat heater element 1 which has an electricity conducting heat generation part 2 and a plurality of electrodes 3 provided in the heat generation part 2 and raises the temperature of the heat generation part 2 by applying electricity to the electrodes 3, electricity conduction of an arbitrary part of the heat generation part 2 is increased higher than the other part thereof so that the temperature of the arbitrary part in which electricity conducting performance is increased can be raised to a higher temperature than the other parts.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a planar heating element used for a bed used by a patient or the like in a hospital or a rehabilitation center, and more particularly, to the temperature of an arbitrary portion higher than the temperature of another portion. The present invention relates to a planar heating element capable of rising to a temperature.

[0002]

2. Description of the Related Art Conventionally, in hospitals, rehabilitation centers, nursing homes and the like, a bed used by a patient or the like is provided with a heating device in order to keep the body of the patient or the like sleeping on the bed cool. Many. For example, an electric blanket is provided in a bed, or a hot water bottle or the like is placed in a futon so as to keep a patient's body cool during sleep.

[0003] On the other hand, when the body of a patient or the like who is sleeping on a bed is warmed, the temperature of the head and feet is good. Therefore, it is better to heat the feet at a higher temperature than at the back. Also,
Depending on the condition of the patient, some parts of the body, such as the patient, may need to be warmer than others.

[0004]

However, in the case of an electric blanket, for example, in order to raise the temperature of the entire blanket to a certain temperature, the temperature of the feet of the patient or the like is made higher than the temperature of the back or the patient or the like. The problem is that any part of the body cannot be warmed at a higher temperature than the other parts.

[0005] When a hot water bottle or the like is used, it is possible to warm only the feet or any desired portion.
When using a hot water bottle, it is common to add hot water so that it can be used for a longer time. For this reason, patients may unconsciously kick out of the bed without being able to endure the heat of the hot water bottle, and in such a case,
It becomes impossible to heat the body of a patient or the like who is sleeping on the bed. In addition, when using a hot water bottle, it is common to wrap the hot water bottle with a blanket, etc. for the safety of the user. Is also conceivable.

Accordingly, an object of the present invention is to provide a planar heating element in which only an arbitrary portion can be set to a higher temperature than other portions.

[0007]

Means for Solving the Problems The planar heating element of the present invention comprises:
A sheet heating element having a conductive heat generating portion and a plurality of electrodes provided on the heat generating portion and increasing the temperature of the heat generating portion by applying electricity to the electrodes; By making the conductive performance of the portion higher than the conductive performance of the other portions, the temperature of an arbitrary portion having higher conductive performance can be raised to a temperature higher than the temperature of the other portions.

In the planar heating element of the present invention, the conductive wire performance of an arbitrary portion of the heat generating portion is made higher than the conductive performance of the other portion, so that the portion having higher conductive performance can be heated to a higher temperature than the other portion. Since it is possible to raise the temperature, for example, a portion corresponding to the foot portion of the user when the device is mounted on the bed can be raised to a higher temperature than the other portions, and the temperature of the head can be lowered.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION In the planar heating element of the present invention, a plurality of electrodes are arranged in a heating section having conductivity, and electricity is applied to the electrodes to generate Joule heat between the electrodes to generate heat. The temperature of the part can be raised, and further, the heat generating part makes the conductive performance of any part higher than the conductive performance of other parts, and makes any part having higher conductive performance higher than the other parts. It is possible to raise the temperature.

[0010] The optional portion for enhancing the conductive performance may be, for example, one of the portions corresponding to the feet, or an optional portion for enhancing the electrical conductivity may be provided at a plurality of locations according to the condition of the patient or the like. Good. This makes it possible to more effectively warm the body of the patient or the like according to the condition of the patient or the like.

In the case where a plurality of portions having high conductivity are provided, portions having high conductivity and other portions may be alternately formed. The conductive performance may be corrugated with other portions.

Further, the conductive performance of the heat generating portion may be sequentially increased stepwise from an arbitrary position, whereby the temperature of the raised heat generating portion may be increased according to the conductive performance gradually increased in a stepwise manner. It can be stepped.

As the heat generating portion, any member may be used as long as it has conductivity, but more preferably, a member having PTC characteristics is used.

As is well known, the PTC is a type of thermistor that converts a change in temperature into a change in electric resistance of an element, and has a characteristic that the electric resistance increases as the temperature increases. Therefore, by using the heat generating portion having the PTC characteristic, it is possible to prevent the temperature of the heat generating portion from rising and causing so-called temperature runaway or local overheating.
It is possible to ensure the safety of patients and the like, and also to ensure the stability of temperature.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a sheet heating element according to the present invention will be described with reference to the drawings. FIG. 1 is a view showing a sheet heating element according to this embodiment. It is a sheet heating element.

As shown in the drawing, the sheet heating element 1 of the present embodiment has a heating portion 2 provided with a plurality of electrodes 3.
By applying electricity to the electrodes 3, Joule heat is generated between the electrodes 3 and the temperature of the heat generating portion 2 is increased.

Here, the heat generating portion 2 may be made of any material as long as it is conductive. For example, a material in which a conductive material is coated or printed on a cloth material, a material in which cloth or the like is impregnated with a conductive material, or the like can be used. It is also conceivable to knit a yarn impregnated with a conductive substance.

In this embodiment, the conductive material is
A paint with PTC characteristics is used.
A conductive heat generating portion is achieved by applying a paint having TC characteristics. For this reason, the PTC characteristic that the electric resistance increases with an increase in temperature is exhibited, and the temperature runaway and local overheating of the heating section 2 can be effectively prevented, and the safety of patients and the like can be sufficiently ensured. It is possible.

In the heat generating portion 2 of the sheet heating element 1 of the present embodiment, the conductive performance of the portion corresponding to the foot portion when the patient or the like lies down, more specifically, the portion 4 indicated by oblique lines in FIG. Is made higher than the conductive performance of the other parts, and more specifically, the paint having the PTC property is applied more to the area corresponding to the foot part to improve the flow of electricity. Therefore, in the planar heating element 1 of the present embodiment, the temperature of the portion corresponding to the foot portion can be higher than the temperature of the other portions, the head temperature can be reduced, and the sick person lying in bed And the body of a rehabilitation patient or the like can be more effectively warmed.

In the sheet heating element 1 of the present embodiment, the amount of the coating material having the PTC characteristic is set so that the temperature of the foot rises from 30 ° C. to 35 ° C. and the temperature of the other part rises to about 22 ° C. Therefore, it is possible to effectively warm the body of a patient or the like who is sleeping on the bed.

The planar heating element 1 of the present embodiment includes:
A rectangular shape having a length of 1600 mm and a width of 400 m is used, and the distance between the electrodes 3 is made narrower so that the temperature of the heat generating portion 2 can be sufficiently increased with a voltage of 30 V or less. Therefore, safety against electric shock accidents can be ensured, and power can be saved due to energy saving.

Next, the method of using the sheet heating element 1 of this embodiment will be described. When the sheet heating element 1 of this embodiment is used, as shown in FIG. Is covered with an insulating covering material 5 or the like to complete the heating device 6. After that, as shown in FIG. 4, the heating device 6 only needs to be placed on the bed 7. Thereafter, by applying electricity to the electrodes 3 using a commercial power supply or the like (not shown), Joule heat is generated between the electrodes 3 and the temperature of the heat generating portion 2 rises, and the body of a patient or the like who is sleeping on a bed Can be warmed.

At this time, since the temperature of the foot portion 4 is raised to a temperature higher than the temperatures of the other portions, a so-called head cold foot temperature can be achieved.
It is possible to warm the body effectively.

Further, since the paint having PTC characteristics is used as the conductive agent, the PTC characteristic that the electric resistance increases with the rise in temperature is exhibited, and the temperature runaway and local overheating of the heat generating portion 2 are prevented. It can be effectively prevented, and it is possible to ensure the safety of patients and the like and the stability of temperature.

In this embodiment, the case where the temperature of the foot portion 4 can be raised to a temperature higher than the temperature of the other portions has been described. However, the planar heating element of the present invention is not necessarily limited to this mode. Instead, for example, in addition to the foot portion, the portion corresponding to the waist, the portion corresponding to the shoulder, etc., by making the conductive performance of a plurality of places higher than the conductive performance of other places, the temperature of the place is higher than the temperature of the other parts. It may be possible to raise the temperature to a high temperature, so that it is possible to effectively heat a necessary part of the body of the patient or the like according to the condition of the patient or the like.

In addition, a coating material may be applied so that a portion having high conductive performance and another portion are alternately arranged. In this case, the amount of the coating material is adjusted so that the conductive performance becomes wavy. You may.

Further, the coating amount of the paint is adjusted from an arbitrary position, that is, an intermediate portion of the heat-generating portion or an end of the heat-generating portion so that the conductive performance gradually increases in a stepwise manner. According to the performance, the temperature of the raised heat generating portion 2 may be set to be stepwise.

[0028]

The planar heating element of the present invention is embodied in the form described above, and has the following effects.

The planar heating element of the present invention includes a conductive heating section and a plurality of electrodes provided on the heating section, and increases the temperature of the heating section by applying electricity to the electrodes. In the planar heating element, the conductive performance of any part of the heat generating part is made higher than the conductive performance of other parts, so that the temperature of any part whose conductive performance is increased is higher than the temperature of other parts. It is characterized by being able to ascend to. For this reason, by making the conductive performance of an arbitrary portion, for example, a portion corresponding to a foot portion higher than the conductive performance of other portions, a so-called head cold foot temperature can be achieved, and the body can be effectively warmed.

Further, by providing a plurality of arbitrary portions for enhancing the conductive performance, it becomes possible to more effectively warm the body of a patient or the like according to the condition of the patient or the like.

Further, by using the heat generating portion having the PTC characteristic, the PTC characteristic that the electric resistance rises with the temperature rise is exhibited, and the temperature runaway that the temperature of the heat generating portion becomes too high can be effectively prevented. In addition to ensuring the safety of patients and the like, it is also possible to ensure the stability of temperature.

[Brief description of the drawings]

FIG. 1 is a view showing an embodiment of a sheet heating element of the present invention.

FIG. 2 is a view showing an arbitrary portion of a heat generating portion for improving conductive performance in the embodiment of the sheet heating element of the present invention.

FIG. 3 is a diagram for explaining a method of using the embodiment of the sheet heating element of the present invention.

FIG. 4 is a diagram for explaining a method of using the embodiment of the sheet heating element of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Planar heating element 2 Heating part 3 Electrode 4 Part which improves conductivity 5 Coating material 6 Heating device 7 Bed

Claims (6)

[Claims] A conductive heating part (2) and said heating part (2)
And a plurality of electrodes (3) provided for the electrode (3).
In the planar heating element (1) for raising the temperature of the heat generating portion (2) by applying electricity to the heat generating portion (2), the conductive performance of an arbitrary portion of the heat generating portion (2) is higher than the conductive performance of other portions. A planar heating element characterized in that the temperature of an arbitrary portion having a higher conductive performance can be increased to a temperature higher than the temperature of other portions. 2. The planar heating element according to claim 1, wherein a plurality of arbitrary portions for enhancing the conductive performance are provided. 3. The planar heating element according to claim 2, wherein portions having higher conductive performance and other portions are alternately formed. 4. The sheet heating element according to claim 3, wherein the conductive performance of the heat generating portion (2) is wavy between a portion where the conductive performance is enhanced and another portion. 5. A conductive heat generating part (2), and said heat generating part (2).
And a plurality of electrodes (3) provided for the electrode (3).
In the planar heating element (1) for increasing the temperature of the heat generating portion (2) by applying electricity to the heat generating portion (2), the conductive performance of the heat generating portion (2) is sequentially increased stepwise from an arbitrary position. A planar heating element characterized in that the temperature of the heat-generating portion (2) rises in a step-like manner in accordance with the conductive performance gradually increased in a step-like manner. 6. The heat generating section according to claim 1, wherein said heat generating section is a heat generating section having a temperature-dependent positive electric resistance change characteristic (hereinafter abbreviated as "PTC characteristic"). The sheet heating element according to any one of the above.