JPH0896938A - Planar heater having air permeability - Google Patents

Abstract

PURPOSE: To provide a planar heater which has air permeability, flexibility, and shape restorability. CONSTITUTION: A thread-shaped heater 1 is made by covering a soft heating fiber, which generates heat by carrying current, with a heat-resistant soft insulating material. A planar heater 2 is made of many these thread-shaped heaters 1 and many threads crossing these.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a breathable surface heating element.

[0002]

2. Description of the Related Art Conventionally, a sheet heating element a used for bedding and the like.
As shown in FIG. 5, a heat generating fiber b impregnated with a large number of carbon particles and a large number of insulating threads c are woven to form a sheet heating element a, and both sides of the sheet heating element a are formed. Then, a flexible insulating material d is laminated or coated to form a flexible sheet heating element a.

As shown in FIG. 4, the sheet heating element a is sandwiched between nylon taffeta 10, urethane foam 11, wool 12, nap 13 and the like to form a mattress B and the like.
The same heating element a heats and keeps the bedding warm.

[0004]

However, bedding and the like require air permeability in order to pass moisture or the like emitted from the human body. As described above, the sheet heating element a contains the insulating substance d. Since it is laminated or coated, it does not have breathability, so that there is a problem that not only the bedding is damp and the sleeping comfort is bad, but also various bacteria are easily proliferated due to the damp, which is not good for health.

Further, for example, when it is used for a mattress,
Due to the local load and heat from the human body, the insulating material d laminated or coated on the planar heating element a undergoes an expansion that does not restore, so that the planar heating element a is permanently deformed. .

[0006]

According to the present invention, a filamentous heating element is formed by coating the outer periphery of a flexible exothermic fiber that generates heat when energized with a flexible insulating material having heat resistance. The present invention provides a surface heating element having air permeability, which is characterized in that it is formed into a cloth shape with a large number of yarns intersecting these.

Another feature is that a large number of the filamentous heating elements are crossed to form a cloth.

[0008]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment of the sheet heating element A according to the present invention, which is composed of a large number of filament heating elements as warps and a large number of yarns as wefts.

As shown in FIG. 2, the filamentous heating element 1 is a flexible exothermic fiber 3 which is made of heat-resistant polyester fiber, cotton thread, etc. impregnated with carbon powder to generate heat by energization. Is formed on the outer periphery of the exothermic fiber 3,
For example, a flexible insulating material 4 such as heat resistant polyester resin is coated.

In addition to the above, the exothermic fiber 3 includes
It is possible to use a material in which a monofilament is formed by kneading a conductive synthetic resin or a heat resistant synthetic resin and carbon powder, or a high resistance metal twisted wire.

The thread-shaped heating element 1 is used as a warp, and a thread 2 having appropriate heat resistance such as a cotton thread is used as a weft in a cloth shape.

With this structure, gaps 5 are formed between a large number of filamentous heating elements 1 and a large number of threads 2 constituting the planar heating element A, and the gaps 5 ensure the air permeability of the planar heating element A. Further, since the filamentous heating element 1 and the thread 2 have flexibility, the planar heating element A is flexible, and moreover, since the filamentous heating element 1 and the thread 2 are woven in a planar manner, Since a slight slip is allowed between the filamentous heating element 1 and the filament 2, even if the planar heating element A is once deformed by the load, it can be naturally restored to its original shape when the load is removed. You can

Then, as shown in FIG. 3, both ends of the exothermic fiber 3 of each filamentous heating element 1 are connected to a power source 7 via an electric wire 6 to generate Joule heat in the exothermic fiber 3. The sheet heating element A can generate heat.

Further, a large number of filamentous heating elements 1 can be crossed to form a cloth, that is, the sheet heating element A can be formed by using the filamentous heating elements 1 for both warp and weft. In this case, since the warp yarn and the weft yarn can both generate heat, the amount of heat generated by the planar heating element can be increased.

FIG. 4 shows an embodiment in which the sheet heating element A is applied to the mattress B. The sheet material is made up of the cushion material 9, nylon taffeta 10, urethane foam 11, wool 12, brushed cloth 13, etc. The heating element A is sandwiched to form a mattress B, and the mattress B is heated or kept warm by the same surface heating element A. In particular, far-infrared rays are generated from the heat-generating fiber 3. As a result, the human body while sleeping can be favorably affected, and the dampness of moisture from the mattress B can be improved.

[0017]

According to the present invention, a filamentous heating element is formed by coating the outer periphery of a flexible exothermic fiber which is heated by energization with a flexible insulating material having heat resistance. By forming it into a cloth shape with a large number of yarns that intersect with, it is possible to impart breathability, flexibility and shape restoration to the planar heating element. For example, when used for bedding, etc., it is emitted from the human body. Since it allows moisture to pass through and be released to the outside air, it can prevent bedding from getting damp, which not only improves sleep comfort but also prevents germs from growing, which is beneficial for health. Since permanent deformation is prevented, it is possible to endure long-term use.

Further, if a large number of the above-mentioned filamentous heating elements are crossed to form a cloth, both the warp and the weft can generate heat, so that the heating value of the planar heating element can be increased.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing a configuration of a planar heating element according to the present invention.

FIG. 2 is a sectional view showing a configuration of a filamentous heating element.

FIG. 3 is an explanatory view showing the action of a planar heating element.

FIG. 4 is a partially cutaway perspective view showing an embodiment in which the sheet heating element is applied to a mattress.

FIG. 5 is a partially cutaway perspective view showing the structure of a conventional sheet heating element.

[Explanation of symbols]

 A Sheet heating element 1 Thread heating element 2 Thread 3 Exothermic fiber 4 Insulating material

Claims (2)

[Claims] 1. A flexible exothermic fiber that generates heat when energized.
The outer circumference of (3) is covered with a flexible heat-resistant insulating material (4) to form a filamentous heating element (1). A sheet-like heating element having air permeability, which is formed into a cloth shape by using. 2. A flexible exothermic fiber that generates heat when energized.
The filamentous heating element (1) is formed by covering the outer periphery of (3) with a flexible heat-resistant insulating material (4), and a large number of filamentous heating elements described above are formed.
(1) A sheet-like heating element having air permeability, which is formed by crossing each other into a cloth shape.