JPH04280089A - PTC heating element and heating element having the same - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

0001

2. Description of the Related Art A conventional PTC heating element (positive resistance temperature coefficient heating element), as shown in FIG. 3, and an electrical insulating film 1 was provided on the PTC resistor 2 and the electrode 3.

0002

However, in the above configuration, the length of the PTC resistor 2 may vary depending on the application.
In order to change the width t and thickness d, there was a problem in that a wide variety of PTC heating elements had to be manufactured. Furthermore, when heating a large area, there is a problem in that a plurality of PTC heating elements must be connected in series or in parallel.

The object of the present invention is to solve this problem and provide a PTC heating element that can be used in many applications with a small number of products, and a heating element having the PTC heating element.

0004

[Means for Solving the Problems] In order to achieve the above object, the PTC heating element of the present invention consists of a pair of electrodes facing each other in the longitudinal direction on a flexible elongated electrical insulating film. A heat generating part is provided, two or more heat generating parts made of a crystalline polymer and carbon black are provided at regular intervals in the longitudinal direction of the non-heat generating part, and a flexible elongated piece is provided above the non-heat generating part and the heat generating part. The structure is such that an electrically insulating film is provided.

[0005]

[Operation] With the above structure, the heating area of the present invention can be expanded one-dimensionally, two-dimensionally, or three-dimensionally.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the accompanying drawings.

(Example 1) As shown in FIG. 1, the PTC heating element of this example is made of polyester with a thickness of 100 μm and a long flexible electric insulating film 4.
A pair of opposing electrodes 5 made of electrolytic copper foil with a thickness of 35 μm
A non-heat generating part is provided, and two or more heat generating parts 6 made of 52% by weight of an ionomer resin with good metal adhesion and 48% by weight of conductive carbon black are provided at regular intervals in the longitudinal direction,
An electrical insulating film 4 (not shown in the figure) was provided on the non-heat generating part 5 and the heat generating part 6. The dimensions of the heat generating part 6 were 30 mm in width and 100 mm in length.

[0008] As a result, the PTC heating element of this embodiment has 1
The heating area can be expanded to three dimensions. (Example 2) As shown in FIG. 2, the heating body of this example was made by placing the PT of Example 1 on a flat aluminum plate 7 with a thickness of 1 mm.
The structure was such that the non-heat generating portions of the C heating element were successively bent and bonded together with double-sided adhesive layers 8 to be fixed. Thereby, the heating body of this embodiment can expand the heating area two-dimensionally.

(Embodiment 3) As shown in FIG. 3, the heating element of this embodiment has the heating portion 6 of the PTC heating element of Embodiment 1 on the heated surface 9 of a polyhedron made of a 1 mm thick aluminum plate.
is fixed, and the non-heat generating portion 5 is provided on the non-heating surface 10 or the ridge line portion 11. As a result, the heating body of this example has 3
The heating area can be expanded to three dimensions.

(Embodiment 4) As shown in FIG. 4, in the PTC heating element of this embodiment, the width of a part of the electrode in the non-heat generating part was narrowed to form a fusible electrode 12. The width of the fusible electrode 12 is 2 mm,
When the electrode width of the other portions is set to 6 mm, a PTC heating element is obtained that melts at 300 V, which is three times the rated voltage, and is more reliable than Example 1.

(Example 5) The heating element of this example was constructed by sequentially bending the non-heat generating portions of the PTC heating element of Example 4 and fixing them onto a flat body with adhesive layers on both sides. As a result, a more reliable heating element than that of Example 2 was obtained.

(Example 6) The heating element of this example has a configuration in which the heating part of the PTC heating element of Example 4 is fixed to the heated surface of the polyhedron, and the non-heating part is provided on the non-heating surface or the ridgeline part. And so. As a result, a more reliable heating element than in Example 3 was obtained.

(Example 7) As shown in FIG. 5, the PTC heating element of this example is made of polyester having a thickness of 100 μm and is placed on a flexible long electric insulating film 4 in the longitudinal direction.
A non-heat generating part 13 made of a single electrolytic copper foil electrode is provided, two or more heat generating parts 6 made of a crystalline polymer and carbon black are provided at regular intervals in the longitudinal direction of the non-heat generating part 13, and the heat generating part 13 is made of a crystalline polymer and carbon black. A counter electrode 14 made of electrolytic copper foil and having approximately the same area as the heat generating part 6 is provided on the heat generating part 6, and the counter electrode is connected with a connecting electrode 15 made of a copper flat wire. 14 and the connecting electrode 15, a flexible long electrical insulating film 4 (not shown in the figure) made of polyester and having a thickness of 100 μm was provided. The PTC heating element of this example can generate higher output than the heating element of Example 1.

(Example 8) The heating element of this example is obtained by sequentially bending the non-heat generating part 13 of the PTC heating element of Example 7 and fixing it on a flat plate, and has a higher output than the heating element of Example 2. can occur.

(Example 9) In the heating element of this example, the heating part 6 of the PTC heating element of Example 5 is fixed to the heated surface of the polyhedron, and the non-heating part 6 of the PTC heating element of Example 5 is fixed to the non-heating surface or the ridgeline part. The heating element 13 is configured to be fixed, and can generate a higher output than the heating element of the third embodiment.

(Example 10) The heating element of this example has a part of the electrode of the non-heat generating part of the heating element of Example 7 as a fusible electrode, and is more reliable than the heating element of Example 7. It has a high value.

(Example 11) The heating element of this example is a heating element in which the non-heat generating part of the PTC heating element of Example 10 is successively bent and fixed on a flat plate, and is more reliable than the heating element of Example 8. It has a high value.

(Example 12) In the heating body of this example, the heating part of the PTC heating element of Example 8 is fixed to the heated surface of the polyhedron, and the non-heating part of the PTC heating element of Example 8 is fixed to the non-heating surface or ridgeline part. This heating element is more reliable than the heating element of Example 9.

In addition to the ionomer resin, examples of the crystalline polymer used in the present invention include ethylene vinyl acetate copolymer, ethylene ethyl acrylate copolymer, linear low density polyethylene, high density polyethylene, polypropylene, and polyvinylidene fluoride. Furthermore, craft polymers of these unsaturated carboxylic acids may be used.

As carbon black, channel black, thermal black, acetylene black, lamp black, graphite, graphitized carbon black, and grafted carbon black may be used in addition to conductive carbon black.

[0021] In addition to the electrolytic copper foil, the non-heat generating part may be a plurality of flexible thin metal wires or a flexible metal wire in which a conductor is spirally wound around a core material.

[0022] The fusible electrode may be an electrode that melts due to temperature, in addition to an electrode that has a narrow width in a part of the non-heat generating portion and melts due to overcurrent.

The structure of the polyhedron is not limited to the rectangular shape of the embodiment, but may be a polyhedron having curvature on the heated surface, non-heated surface, or ridgeline portion.

[0024]

Effects of the Invention According to the PTC heating element of the present invention and the heating element having the same, the PTC heating element can be applied to many uses with a small number of products.
A heating element having a C heating element and its PTC heating element is obtained.

[Brief explanation of the drawing]

[Fig. 1] Partial perspective view of a PTC heating element in one embodiment of the present invention.

[Fig. 2] A perspective view of a heating body in one embodiment of the present invention.

[Figure 3] Similarly, a perspective view of the heating element

[Figure 4] Partial perspective view of the PTC heating element

[Figure 5] Partial perspective view of the PTC heating element

[Fig. 6] A perspective view of a PTC heating element in a conventional example.

[Explanation of symbols]

4 Electrical insulation film 5 Non-heat generating part 6 Heat generating part 7 Flat plate 9 Heated surface 10 Non-heating surface 11 Ridge line part 12 Electrolytic electrode 13 Non-heat generating part 14 Counter electrode 15 Connection electrode

Claims (12)

[Claims] Claim 1: A non-heat generating section consisting of a pair of electrodes facing each other in the longitudinal direction is provided on a flexible long electric insulating film, and a crystalline polymer is disposed at regular intervals in the longitudinal direction of the non-generating section. 2. A PTC heating element comprising two or more heat generating parts made of and carphone black, and a flexible long and weak electric insulating film is provided on the non-heat generating part and the heat generating part. 2. A lower heating element which is fixed on a flat plate by sequentially bending the non-heat generating part of the PTC heating element according to claim 1. [Claim 3] The PTC according to Claim 1 on the heated surface of the polyhedron.
A heating element in which the heat generating part of the heating element is fixed, and the non-heat generating part of the PTC heating element is fixed to the non-heating surface or ridgeline part of the polyhedron. 4. The PTC heating element according to claim 1, wherein a part of the electrode of the non-heat generating part is a fusible electrode. 5. A heating element obtained by sequentially bending the non-heat generating part of the PTC heating element according to claim 4 and fixing it on a flat plate. 6. The PTC according to claim 4 on the heated surface of the polyhedron.
A heating element in which the heat generating part of the heating element is fixed, and the non-heat generating part of the PTC heating element is fixed to the non-heating surface or ridgeline part of the polyhedron. 7. A non-heat generating section consisting of one electrode is provided in the longitudinal direction of a flexible long electric insulating film, and a crystalline polymer and carbon black are arranged at regular intervals in the longitudinal direction of the non-generating section. A counter electrode is provided on the heat generating section, a connection electrode is provided between the counter electrodes, and a flexible A PTC heating element equipped with a long electrically insulating film. 8. A heating element obtained by sequentially bending the non-heat generating portion of the PTC heating element according to claim 7 and fixing it on a flat plate. (9) PTC according to (7) on the heated surface of the polyhedron;
A heating element in which the heat generating part of the heating element is fixed, and the non-heat generating part of the PTC heating element is fixed to the non-heating surface or ridgeline part of the polyhedron. 10. The PTC heating element according to claim 7, wherein a part of the electrode of the non-heat generating part is a fusible electrode. 11. A heating element obtained by sequentially bending the non-heating part of the PTC heating element according to claim 10 and fixing it on a flat plate. (12) P according to claim 10 on the heated surface of the polyhedron.
A heating element in which a heating part of a TC heating element is fixed, and a non-heating part of the PTC heating element is fixed to a non-heating surface or a ridgeline part of the polyhedron.