Self-temperature-control heating wire and heating element with self-temperature-control heating wire

Abstract

The utility model relates to an automatic temperature control heating wire and a heating element with the same. The automatic temperature control heating wire comprises a plurality of leads, a temperature control heating layer and an insulating layer. The wires comprise first wires and second wires which are arranged in parallel and at intervals. The resistivity of the temperature control heating layer is increased along with temperature rise, one end of the temperature control heating layer wraps the first wire, the other end of the temperature control heating layer wraps the second wire, the temperature control heating layer is bent to enable the transverse section of the temperature control heating layer to be in a C shape, an opening is formed between the first wire and the second wire, and the insulating layer fills and extrudes the opening and wraps the temperature control heating layer. Therefore, the practicability and the safety of the self-temperature-control heating wire are improved.

Description

Technical Field

[0001] This utility model relates to a cable, and more particularly to a self-temperature-controlled heating wire and a heating element having a self-temperature-controlled heating wire. Background Technology

[0002] Existing self-regulating heating cables, also known as self-regulating heating tapes, are mostly flat in structure. While this structure facilitates manufacturing and mass production, it presents several limitations in practical applications. Due to their flat cross-section, they exhibit high overall rigidity and a large bending radius, making them unsuitable for space-constrained construction or application environments with limited bending radius requirements. Furthermore, conventional self-regulating heating tapes are primarily designed for straight-line or flat-wound installation on the surfaces of pipes, tanks, and other industrial facilities. When S-shaped or multiple bends are required, they are prone to flipping or standing up at the bends, increasing the thickness of the tape and hindering the subsequent installation of insulation or protective layers.

[0003] Furthermore, when the aforementioned flat heating cables need to be bent or twisted during construction, excessive bending angles or improper operation can easily damage the internal structure of the heating cables, leading to the failure of their self-regulating temperature performance or overall functional damage. Due to these structural and usage limitations, commonly available self-regulating heating cables are difficult to use widely in specific application areas, significantly restricting their application scope.

[0004] In view of this, the creator has devoted himself to studying the aforementioned existing technologies and applying theoretical principles to try his best to solve the above-mentioned problems, which has become the creator's goal for improvement. Utility Model Content

[0005] One objective of this invention is to provide a self-temperature-controlled heating wire, wherein the temperature-controlled heating layer with a C-shaped cross-section can reduce the wire diameter and adjust the power according to the ambient temperature, thereby improving the practicality and safety of the self-temperature-controlled heating wire.

[0006] To achieve the above objectives, this utility model provides a self-regulating heating wire, comprising several conductors, a temperature-controlled heating layer, and an insulating layer. The conductors include first and second conductors arranged in parallel and spaced apart. The resistivity of the temperature-controlled heating layer increases with increasing temperature. One end of the temperature-controlled heating layer covers the first conductor, and the other end covers the second conductor. The temperature-controlled heating layer is bent to form a C-shaped cross-section, creating an opening between the first and second conductors. The insulating layer fills the opening and covers the temperature-controlled heating layer.

[0007] Another objective of this invention is to provide a heating element with a self-regulating heating wire, comprising a heated body and a self-regulating heating wire. The self-regulating heating wire is fixed to the heated body on any structure and material surface through manufacturing processes including, but not limited to, laying, pressing, winding, and sewing.

[0008] In one embodiment of the present invention, the first conductor and the second conductor are each composed of a single or multiple metal wires.

[0009] In one embodiment of this utility model, the temperature-controlled heating layer is made of a polymer composite material.

[0010] In one embodiment of the present invention, the self-temperature-controlled heating wire further includes a shielding layer, which is covered with an insulating layer.

[0011] In one embodiment of this utility model, the shielding layer is composed of a metal woven mesh or a metal wrapping layer.

[0012] In one embodiment of the present invention, the self-temperature-controlled heating wire further includes a sheath covering a shielding layer.

[0013] In one embodiment of this utility model, the self-temperature-controlled heating wire is cylindrical in shape.

[0014] Compared to known technologies, the temperature-controlled heating layer of this invention's self-regulating heating wire is made of a high-polymer composite material and is extruded into a C-shaped cross-section. This increases the width of the temperature-controlled heating layer within a smaller outer diameter. The wider temperature-controlled heating layer positively impacts the stability of the self-regulating material and the heating area, and allows for autonomous control of output power without overheating, thus improving safety. Furthermore, the insulation layer in this invention is also extruded, integrally filling the opening in the conductor. This increases the creepage distance (the shortest distance between two conductive components along the surface of a solid insulating material) while maintaining a small outer diameter and sufficient conductor spacing, thereby avoiding short-circuit risks. This self-regulating heating wire allows for the selection of conductors with different cross-sectional areas, and the insulation material and thickness can be chosen according to electrical performance and application requirements, resulting in different wire diameters, sizes, and power ratings. Furthermore, the self-regulating heating wire of this invention is small in size and has a cylindrical shape, making it suitable for small areas and easy to install. It can also be well laid, pressed, wrapped, and sewn onto any structural surface, thereby increasing its application range and practicality. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the self-temperature-controlled heating wire of this utility model.

[0016] Figure 2This is a cross-sectional view of the self-temperature-controlled heating wire of this utility model.

[0017] Figures 3 to 5 This diagram illustrates three application states of the self-temperature-controlled heating wire of this utility model.

[0018] Explanation of symbols in the attached diagram:

[0019] 1: Self-regulating heating wire;

[0020] 2: Heating element;

[0021] 3~5: Heated body;

[0022] 10: Wire;

[0023] 100: Open;

[0024] 11: First conductor;

[0025] 12: Second conductor;

[0026] 20: Temperature-controlled heating layer;

[0027] 30: Insulation layer;

[0028] 40: Shielding layer;

[0029] 50: Sheath. Detailed Implementation

[0030] The detailed description and technical content of this utility model are explained below with reference to the accompanying drawings. However, the accompanying drawings are provided for reference and illustration only and are not intended to limit this utility model.

[0031] Please refer to Figure 1 and Figure 2 This is a three-dimensional schematic diagram and cross-sectional view of the self-temperature-controlled heating wire of this utility model. This utility model is a self-temperature-controlled heating wire 1, which includes several conductors 10, a temperature-controlled heating layer 20, and an insulating layer 30. The conductors 10 include a first conductor 11 and a second conductor 12 arranged in parallel and spaced apart. One end of the temperature-controlled heating layer 20 covers the first conductor 11, and the other end covers the second conductor 12. The temperature-controlled heating layer 20 is bent to form a C-shaped cross-section, creating an opening 100 between the first conductor 11 and the second conductor 12. The insulating layer 30 fills the opening 100 and covers the temperature-controlled heating layer 20.

[0032] It should be noted that the temperature-controlled heating layer 20 of this invention is C-shaped to form an opening 100, and an insulating layer 30 is squeezed into the opening 100. This arrangement ensures that there is sufficient spacing between the first conductor 11 and the second conductor 12, and ensures that the temperature-controlled heating layer 20 has sufficient width and heating area, thereby minimizing the overall outer diameter of the self-regulating heating wire 1 while meeting the width requirements of the temperature-controlled heating layer 20.

[0033] In this embodiment, the wires 10 and the temperature-controlled heating layer 20 can be formed into a semi-finished product by extrusion molding, and then an insulating layer 30 can be extruded to cover the outer layer of the temperature-controlled heating layer 20, thereby isolating and protecting the live wires 10 and the temperature-controlled heating layer 20.

[0034] Specifically, the first conductor 11 and the second conductor 12 are each composed of one or more metal wires. The temperature-controlled heating layer 20 is made of a polymer composite material, such as a positive temperature coefficient (PTC) material. The temperature-controlled heating layer 20 covers the first conductor 11 and the second conductor 12 to form a conductive circuit. When an external current is received, the current flows through the first conductor 11, the second conductor 12, and the temperature-controlled heating layer 20, utilizing the impedance characteristics of the temperature-controlled heating layer 20 for heating and automatic temperature adjustment. The temperature-controlled heating layer 20 of this invention has a positive temperature coefficient (PTC) characteristic, can be connected in parallel, and can automatically adjust its output power according to temperature changes, automatically limiting the heating temperature. Furthermore, the resistivity of the temperature-controlled heating layer 20 increases with increasing temperature, and increases sharply within a certain temperature range.

[0035] Furthermore, it should be noted that the size of the temperature-controlled heating layer 20 can even be set to less than 2mm, resulting in a smaller outer diameter and bending radius. Accordingly, the self-regulating heating wire 1 of this invention can be used in micro-environments, reducing construction difficulty, and can automatically adjust its power according to temperature to achieve a constant temperature, avoiding burns from excessive heat and increasing safety during use.

[0036] In this embodiment, the self-regulating heating wire 1 further includes a shielding layer 40 and a sheath 50. The shielding layer 40 is composed of a metal braided mesh or a metal wrapping layer to cover the insulation layer 30. The sheath 50 covers the shielding layer 40. Furthermore, the self-regulating heating wire 1 is cylindrical in shape. This cylindrical shape makes the self-regulating heating wire 1 more suitable for construction and application environments that require winding or bending.

[0037] In this embodiment, the shielding layer 40 meets the requirements for electromagnetic shielding and grounding. Additionally, the sheath 50 provides sufficient protection to prevent the self-regulating heating wire 1 from being damaged in the external environment.

[0038] Please refer to another source. Figures 3 to 5 This is a schematic diagram illustrating the application of the self-regulating heating wire of this utility model. This utility model also provides a heating element 2 with a self-regulating heating wire 1. The heating element 2 includes a heat-receiving body 3 and the aforementioned self-regulating heating wire 1. The self-regulating heating wire 1 is fixed to the heat-receiving body 3 on any structure and material surface, and is manufactured using processes such as, but not limited to, laying, pressing, winding, and sewing, to form the heating element 2. When the self-regulating heating wire 1 receives an externally supplied current for heating, it transfers the heating temperature generated by the temperature-controlled heating layer 20 to the heat-receiving body 3. The heating element 2 then uses the self-regulating heating wire 1 and the heat-receiving body 3 to heat the external environment.

[0039] It should be noted that the self-temperature controlled heating wire 1 of this utility model can be cut at will or extended within a certain length range, and can be crossed and overlapped without the risk of overheating and burning. It has the advantages of simple maintenance and energy saving.

[0040] like Figure 3 The heated body 3 has a plane, such as a flat plate made of flexible materials such as fabric, leather, or polymer products. Figure 4 The heating element 4 is configured as an arc-shaped structure, and the self-regulating heating wire 1 is laid on the heating elements 3 and 4 in an S-shaped bend or a specific wiring pattern. Accordingly, the heating element 2 can be implemented in applications such as floor heating, roof heating, or flexible heating products such as electric blankets. Furthermore, Figure 5 The heated element 5 is a cylinder. The self-regulating heating wire 1 is wound around the heated element 5 in an S-shaped bend to form a cylindrical heating element 2.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the patent scope of the present utility model. Other equivalent changes that utilize the patent spirit of the present utility model should all fall within the patent scope of the present utility model.

Claims

1. A self-temperature-controlled heating wire, characterized in that, include: Several wires, the several wires including a first wire and a second wire arranged in parallel and spaced apart; A temperature-controlled heating layer has a resistivity that increases with increasing temperature. One end of the layer covers the first conductor, and the other end covers the second conductor. The temperature-controlled heating layer is bent so that its cross-section is C-shaped, and an opening is formed between the first conductor and the second conductor. as well as An insulating layer is used to fill the opening and cover the temperature-controlled heating layer.

2. The self-temperature controlled heating wire according to claim 1, characterized in that, The first conductor and the second conductor are each composed of a single metal wire or several metal wires.

3. The self-temperature controlled heating wire according to claim 1, characterized in that, The temperature-controlled heating layer is made of a polymer composite material.

4. The self-temperature controlled heating wire according to claim 1, characterized in that, It also includes a shielding layer that covers the insulating layer.

5. The self-temperature controlled heating wire according to claim 4, characterized in that, The shielding layer is made of metal woven mesh.

6. The self-temperature controlled heating wire according to claim 4, characterized in that, It also includes a sheath that covers the shielding layer.

7. The self-temperature controlled heating wire according to claim 1, characterized in that, The self-regulating heating wire is cylindrical in shape.

8. A heating element with a self-regulating heating wire, characterized in that, include: A heated body; and A self-regulating heating wire as described in any one of claims 1 to 7, wherein the self-regulating heating wire is disposed on the heated body.

9. The heating element with a self-temperature-controlled heating wire according to claim 8, characterized in that, The heated body has a planar or arc-shaped structure.

10. The heating element with a self-temperature-controlled heating wire according to claim 8, characterized in that, The heated body is a cylinder.

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