Silicone rubber heater capable of heating uniformly

Abstract

The utility model discloses a silicone rubber heater with uniform heating, which comprises a heater body and a wiring terminal connected on the heater body, the heater body comprises a substrate layer, a heat insulation layer, a silicone rubber layer and an insulation layer which are arranged in sequence, annular heat conduction wires are arranged in the silicone rubber layer in a laminated manner, and the annular heat conduction wires are connected with the wiring terminal. Partition gaps are formed between the annular heat conduction wires, a plurality of partition supports are arranged in the partition gaps, positioning clamping grooves are formed in the two sides of each partition support, positioning protrusions are arranged at the two ends of each positioning clamping groove, heat conduction gaps are formed between the annular heat conduction wires on the same layer, the positioning protrusions are inserted into the heat conduction gaps in a penetrating mode, and the annular heat conduction wires are connected into the positioning clamping grooves. The wiring end of the annular heat conduction wire is electrically connected with the wiring terminal. The heat conduction wires are designed to be annular and are arranged in a stacked mode, the uniformity of heat distribution is improved, the independence and stability of all layers of heat conduction wires are ensured through the design of the partition gaps and the partition supports, and the uniformity of overall heating is further improved.

Description

Technical Field

[0001] This utility model relates to the field of electric heating device technology, specifically to a silicone rubber heater that provides uniform heating. Background Technology

[0002] Silicone rubber heaters, also known as silicone rubber heating elements, are mainly composed of nickel-chromium alloy heating wires and a high-temperature silicone rubber insulation layer. The high-temperature silicone rubber insulation layer possesses excellent heat resistance, cold resistance, dielectric properties, ozone resistance, and atmospheric aging resistance. A key advantage of silicone rubber is its wide operating temperature range, allowing for long-term use from -60℃ (or lower) to +250℃ (or higher).

[0003] Existing silicone rubber heaters all adopt a single-layer flat heating wire structure. For example, Chinese patent CN220965191U discloses an anti-aging silicone rubber electric heater in which a straight-through single-layer heating wire is fixedly connected to the silicone rubber layer. Such a structure has the defect of uneven heating, which leads to the technical problems of poor temperature control and accelerated local aging of silicone rubber heaters.

[0004] In view of this, there is an urgent need to develop a silicone rubber heater with uniform heating to overcome the technical defects of the current silicone rubber heater. Summary of the Invention

[0005] To address the aforementioned problems, this utility model provides a silicone rubber heater with uniform heating, comprising a heater body and terminals connected to the heater body. The heater body includes a substrate layer, a heat insulation layer, a silicone rubber layer, and an insulating layer arranged sequentially. The silicone rubber layer contains stacked annular heat-conducting wires with gaps between them. These gaps are fitted with several partition supports, and positioning slots are provided on both sides of each partition support. Positioning protrusions are provided at both ends of each positioning slot. Heat-conducting gaps are provided between the annular heat-conducting wires in the same layer. The positioning protrusions are inserted into these heat-conducting gaps. The annular heat-conducting wires are connected to the positioning slots, and the terminals of the annular heat-conducting wires are electrically connected to the terminals.

[0006] Based on the first aspect, in one possible implementation, the terminal block includes two sets of electrical connection components. The electrical connection components include a terminal base, a terminal frame, a terminal fastener, an electrical connection piece, and a conductive pin. The terminal frame is connected inside the terminal base, the terminal fastener is connected to the terminal frame, one end of the electrical connection piece is connected inside the terminal frame, and the other end of the electrical connection piece is connected to the conductive pin. The conductive pin is connected to the terminal of the annular heat-conducting wire.

[0007] Based on the first aspect, in one possible implementation, the electrical connector includes a crimping portion, an extension portion, and a plug portion in sequence. The crimping portion passes through the wiring frame and faces the wiring fastener. The conductive pin includes a plug end and a solder end. The plug end is connected to the plug portion, and the solder end is connected to the wiring end of the annular heat-conducting wire.

[0008] Based on the first aspect, in one possible implementation, the wiring base is provided with an inlet hole and a wiring hole, with the inlet hole facing the wiring frame and the wiring hole facing the wiring fastener.

[0009] Based on the first aspect, in one possible implementation, the annular heat-conducting wire adopts a coiled wiring method from the outside to the inside, and the wiring end of the annular heat-conducting wire is located at the outermost edge of the annular heat-conducting wire.

[0010] Based on the first aspect, in one possible implementation, the diameter of the annular heat-conducting wire is 1.0 mm to 2 mm, and the material of the annular heat-conducting wire includes at least one of iron-chromium-aluminum alloy and nickel-chromium alloy.

[0011] Based on the first aspect, in one possible implementation, the silicone rubber layer is made of silicone rubber material, and the thickness of the silicone rubber layer is 3.0mm to 6.0mm.

[0012] Based on the first aspect, in one possible implementation, the substrate layer is made of aluminum alloy and has a thickness of 1.5mm to 3.0mm.

[0013] Based on the first aspect, in one possible implementation, the insulation layer is made of fiberglass cloth or polyimide, and the thickness of the insulation layer is 0.2mm to 0.5mm.

[0014] Based on the first aspect, in one possible implementation, the insulating layer is made of fiberglass cloth and has a thickness of 0.3mm to 0.8mm.

[0015] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0016] This technical solution for the silicone rubber heater increases the uniformity of heat distribution by designing the heat-conducting wires in a ring and stacked arrangement. This avoids the problem of local overheating caused by uneven current density in traditional single-layer structures. The design of the partition gaps and partition supports ensures the independence and stability of each layer of heat-conducting wires, preventing heat accumulation in local areas and further improving the overall uniformity of heating. The novel structure of the silicone rubber heater effectively reduces local overheating points through uniform heating, thereby slowing down the aging rate of the material, extending the overall service life of the heater, and reducing maintenance costs.

[0017] The improved heating uniformity of the silicone rubber heater in this technical solution results in a more consistent surface temperature distribution, reducing temperature fluctuations caused by localized overheating or undercooling, thereby improving temperature control accuracy. The design of the annular heat-conducting wire may shorten the heat transfer path, making the heater respond more quickly to temperature changes and contributing to more precise temperature control. Attached Figure Description

[0018] Figure 1 This is a perspective view of a silicone rubber heater according to an embodiment of the present invention.

[0019] Figure 2 This is a perspective view of the annular heat-conducting wire and wiring terminals of an embodiment of this utility model.

[0020] Figure 3 This is a cross-sectional view of a silicone rubber heater according to an embodiment of the present invention.

[0021] Figure 4 This is an exploded view of the double-layer annular heat-conducting wire and the partition bracket of this utility model embodiment.

[0022] Figure 5 This is a perspective view of the wiring terminal block in an embodiment of the present utility model.

[0023] Figure 6 This is a perspective view of the internal conductor of the terminal block in an embodiment of this utility model. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] Combined with appendix Figure 1 To be continued Figure 6This utility model provides a silicone rubber heater with uniform heating, comprising a heater body 1 and a terminal block 2 connected to the heater body 1. The heater body 1 includes a substrate layer 11, a heat insulation layer 12, a silicone rubber layer 13, and an insulating layer 14 arranged sequentially. The silicone rubber layer 13 contains stacked annular heat-conducting wires 3, with partition gaps 31 between the annular heat-conducting wires 3. The partition gaps 31 are provided with a plurality of partition supports 4, and the partition supports 4 have positioning slots 41 on both sides. The positioning slots 41 have positioning protrusions 42 at both ends. The annular heat-conducting wires 3 in the same layer have heat-conducting gaps 32, and the positioning protrusions 42 are inserted into the heat-conducting gaps 32. The annular heat-conducting wires 3 are connected to the positioning slots 41, and the terminal block 33 of the annular heat-conducting wires 3 is electrically connected to the terminal block 2.

[0026] In this embodiment, an external wire is connected to the terminal 2 and provides current, which enables the annular heat-conducting wire 3 to conduct electricity and generate heat.

[0027] In this embodiment, the silicone rubber heater increases the uniformity of heat distribution by designing the heat-conducting wires as a ring and stacking them, avoiding the problem of local overheating caused by uneven current density in traditional single-layer structures. The design of the partition gap 31 and the partition bracket 4 ensures the independence and stability between each layer of heat-conducting wires, preventing heat from accumulating locally and further improving the uniformity of overall heating. The novel structure of the silicone rubber heater effectively reduces local overheating points through uniform heating, thereby slowing down the aging rate of the material, extending the overall service life of the heater, and reducing maintenance costs.

[0028] In this embodiment, the terminal block 2 includes two sets of electrical connection components. Each electrical connection component includes a terminal base 21, a terminal frame 22, a terminal fastener 23, an electrical connection piece 24, and a conductive pin 25. The terminal frame 22 is connected inside the terminal base 21, the terminal fastener 23 is connected to the terminal frame, one end of the electrical connection piece 24 is connected inside the terminal frame 22, and the other end of the electrical connection piece 24 is connected to the conductive pin 25. The conductive pin 25 is connected to the terminal 33 of the annular heat-conducting wire 3.

[0029] In this embodiment, the terminal block 2 provides power to the silicone rubber heater by crimping an external wire into the terminal frame 22.

[0030] In this embodiment, the electrical connector 24 sequentially includes a crimping portion 241, an extension portion 242, and a plug-in portion 243. The crimping portion 241 passes through the wiring frame 22 and faces the wiring fastener 23. The conductive pin 25 includes a plug-in end 251 and a solder end 252. The plug-in end 251 is connected to the plug-in portion 243, and the solder end 252 is connected to the wiring end 33 of the annular heat-conducting wire 3. Specifically, the solder end 252 is connected to the wiring end 33 of the annular heat-conducting wire 3 by soldering.

[0031] In this embodiment, the wiring base 21 is provided with a wire inlet hole 211 and a wiring hole 212. The wire inlet hole 211 is directly opposite the wiring frame 22, and the wiring hole 212 is directly opposite the wiring fastener 23.

[0032] In this embodiment, the annular heat-conducting wire 3 adopts a coiled wiring method from the outside to the inside, and the wiring terminal 33 of the annular heat-conducting wire 3 is located at the outermost edge of the annular heat-conducting wire 3.

[0033] In this embodiment, the diameter of the annular heat-conducting wire 3 is 1.0 mm to 2 mm, and the material of the annular heat-conducting wire 3 includes at least one of iron-chromium-aluminum alloy and nickel-chromium alloy.

[0034] In this embodiment, the silicone rubber layer 13 is made of silicone rubber, and the thickness of the silicone rubber layer 13 is 3.0 mm to 6.0 mm.

[0035] In this embodiment, the substrate layer 11 is made of aluminum alloy and the thickness of the substrate layer 11 is 1.5mm to 3.0mm.

[0036] In this embodiment, the heat insulation layer 12 is made of fiberglass cloth or polyimide, and the thickness of the heat insulation layer 12 is 0.2mm to 0.5mm.

[0037] In this embodiment, the insulating layer 14 is made of fiberglass cloth, and the thickness of the insulating layer 14 is 0.3mm to 0.8mm.

[0038] The improved heating uniformity of the silicone rubber heater in this embodiment makes the surface temperature distribution of the heater more consistent, reducing temperature fluctuations caused by local overheating or undercooling, thereby improving temperature control accuracy. The design of the annular heat-conducting wire may shorten the heat transfer path, making the heater respond more quickly to temperature changes and helping to achieve more precise temperature control.

[0039] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0040] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A silicone rubber heater with uniform heating, comprising a heater body and terminals connected to the heater body, characterized in that, The heater body includes a substrate layer, a heat insulation layer, a silicone rubber layer, and an insulating layer arranged sequentially. The silicone rubber layer contains stacked annular heat-conducting wires with gaps between them. Each gap has a partition bracket with positioning slots on both sides and positioning protrusions at both ends. The annular heat-conducting wires in the same layer have heat-conducting gaps with the positioning protrusions inserted into them. The annular heat-conducting wires are connected to the positioning slots, and the terminals of the annular heat-conducting wires are electrically connected to the terminals.

2. The silicone rubber heater with uniform heating according to claim 1, characterized in that, The terminal block includes two sets of electrical connection components. Each electrical connection component includes a terminal base, a terminal frame, a terminal fastener, an electrical connection piece, and a conductive pin. The terminal frame is connected inside the terminal base, the terminal fastener is connected to the terminal frame, one end of the electrical connection piece is connected inside the terminal frame, and the other end of the electrical connection piece is connected to the conductive pin. The conductive pin is connected to the terminal of the annular heat-conducting wire.

3. A silicone rubber heater with uniform heating according to claim 2, characterized in that, The electrical connector includes a crimping portion, an extension portion, and a plug portion in sequence. The crimping portion passes through the wiring frame and faces the wiring fastener. The conductive pin includes a plug end and a solder end. The plug end is connected to the plug portion, and the solder end is connected to the wiring end of the annular heat-conducting wire.

4. A silicone rubber heater with uniform heating according to claim 2, characterized in that, The wiring base has an inlet hole and a wiring hole. The inlet hole is directly opposite the wiring frame, and the wiring hole is directly opposite the wiring fastener.

5. A silicone rubber heater with uniform heating according to claim 1, characterized in that, The annular heat-conducting wire adopts a coiled wiring method from the outside to the inside, and the wiring end of the annular heat-conducting wire is located at the outermost edge of the annular heat-conducting wire.

6. A silicone rubber heater with uniform heating according to any one of claims 1 to 5, characterized in that, The diameter of the annular heat-conducting wire is 1.0 mm to 2 mm, and the material of the annular heat-conducting wire includes at least one of iron-chromium-aluminum alloy and nickel-chromium alloy.

7. A silicone rubber heater with uniform heating according to any one of claims 1 to 5, characterized in that, The silicone rubber layer is made of silicone rubber and has a thickness of 3.0 mm to 6.0 mm.

8. A silicone rubber heater with uniform heating according to any one of claims 1 to 5, characterized in that, The substrate layer is made of aluminum alloy and has a thickness of 1.5mm to 3.0mm.

9. A silicone rubber heater with uniform heating according to any one of claims 1 to 5, characterized in that, The insulation layer is made of fiberglass cloth or polyimide, and its thickness is 0.2mm to 0.5mm.

10. A silicone rubber heater with uniform heating according to any one of claims 1 to 5, characterized in that, The insulating layer is made of fiberglass cloth and has a thickness of 0.3mm to 0.8mm.

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