A new type of heating sheet

Abstract

The utility model discloses a novel heating sheet belongs to electric heating technical field, including main part and setting connecting portion on main part, the main part includes first laminated layer, first mica sheet, resistance sheet, second mica sheet and second laminated layer in proper order, and resistance sheet is connected with connecting portion. First mica sheet and second mica sheet set up in the opposite sides of resistance sheet, and play the role of heat -insulating, first laminated layer and second laminated layer are respectively set up in the outside of first mica sheet and second mica sheet, and one hand provides protection to mica sheet, and the other hand improves the adhesion of with the heated surface of outside, improves the insulation thickness on the other hand.

Description

Technical Field

[0001] This utility model relates to the field of electric heating technology, specifically to a novel heating element. Background Technology

[0002] Heating elements, also known as heating plates, heat external objects by resistive heating when electricity is applied. Mica heating elements are high-performance electrothermal elements that use mica as the insulating substrate. The heating element is formed by embedding metal foil or resistance wire between mica layers, and it has the characteristics of high temperature resistance.

[0003] Patent CN105554925A discloses a mica high-temperature resistant electrothermal film, comprising a metal electrode and, from bottom to top, a first mica layer, a first thermally conductive film, a metal heating layer, a second thermally conductive film, and a second mica layer. However, the adhesion between the mica layer and the heated surface is insufficient, resulting in heat exchange efficiency that cannot meet production requirements.

[0004] Therefore, a new type of heating element with high fit is needed. Utility Model Content

[0005] In view of the above-mentioned technical problems existing in the prior art, the present invention provides a novel heating element that improves the fit with the heated surface.

[0006] This utility model discloses a novel heating element, including a main body and a connecting part disposed on the main body; the main body includes a first bonding layer, a first mica sheet, a resistive sheet, a second mica sheet and a second bonding layer stacked in sequence, and the resistive sheet is connected to the connecting part.

[0007] Preferably, the first and second bonding layers are silicone parts or silicone sheets.

[0008] Preferably, the connecting part is provided with a lead piece for connecting to the resistor piece, and the lead piece is provided with a hole for connecting a power line.

[0009] Preferably, the main body is provided with a mounting part, and the connecting part is provided on the mounting part; The lead wires are mounted on the connection ends of the resistor by soldering.

[0010] Preferably, a third mica sheet is provided on one side of the lead sheet, and the inner side of the third mica sheet overlaps with the first mica sheet.

[0011] Preferably, the first mica sheet covers the main body of the resistor sheet and exposes the two connection ends of the resistor sheet.

[0012] Preferably, one mounting portion and connecting portion are located near the middle of the main body, and the other connecting portion is located near the left or right side of the upper side of the main body; or The two connecting parts are located on the left and right sides of the upper side of the main body, respectively.

[0013] Preferably, the novel heating element has a sheet-like structure; the resistive element has a serpentine structure.

[0014] Preferably, the first mica sheet and the second mica sheet are bonded to the resistor sheet with heat-resistant adhesive; the first bonding layer and the second bonding layer are respectively bonded to the first mica sheet and the second mica sheet with heat-resistant adhesive.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: the first mica sheet and the second mica sheet are disposed on opposite sides of the resistive sheet, which plays the role of heat equalization and insulation; the first bonding layer and the second bonding layer are respectively disposed on the outer side of the first mica sheet and the second mica sheet, which on the one hand provides protection for the mica sheet, on the other hand improves the adhesion to the external heated surface; and furthermore, increases the insulation thickness. Attached Figure Description

[0016] Figure 1 This is a perspective view of the novel heating element in Example 1; Figure 2 It is a sectional view of the main body; Figure 3 This is a sectional view of the connecting part; Figure 4 This is a schematic diagram of the installation of the third mica sheet in Example 2; Figure 5 This is a schematic diagram of the resistor installation; Figure 6 This is a perspective view of the novel heating element in Example 3.

[0017] The diagram is labeled as follows: 1. New type of heating element; 11. Main body; 12. Mounting part; 13. Connecting part; 2. Resistor element; 21. Connecting terminal; 31. First mica sheet; 32. Second mica sheet; 33. Third mica sheet; 41. First bonding layer; 42. Second bonding layer; 5. Lead wire; 51. Solder joint. Detailed Implementation

[0018] 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, not all, of the embodiments of this utility model. 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.

[0019] The present invention will now be described in further detail with reference to the accompanying drawings: Example 1 provides a novel heating element 1, such as Figures 1-6 As shown, it includes a main body 11 and a connecting portion 13 disposed on the main body 11. Figure 2 and Figure 5 The main body 11 includes a first bonding layer 41, a first mica sheet 31, a resistive sheet 2, a second mica sheet 32 ​​and a second bonding layer 42 stacked in sequence, and the resistive sheet 2 is connected to the connecting part 13.

[0020] The first mica sheet 31 and the second mica sheet 32 ​​are disposed on opposite sides of the resistive sheet 2, serving to provide heat equalization and insulation; the first bonding layer 41 and the second bonding layer 42 are respectively disposed on the outer sides of the first mica sheet 31 and the second mica sheet 32, which on the one hand provide protection for the mica sheet, on the other hand improve the adhesion to the external heated surface, and further improve the insulation thickness.

[0021] The first bonding layer 41 and the second bonding layer 42 can be made of silicone parts or silicone sheets, which have good adhesion and cushioning effects, and good thermal conductivity. Thermally conductive silicone parts are preferred.

[0022] In specific tests, the novel heating element 1 was used to heat water in a water tank. It was bonded to the water tank via the first bonding layer 41. Under rated power conditions of 380V and 10000W, the power density reached 11W / cm². 2 .

[0023] The connecting part 13 is provided with a lead piece 5 that is connected to the resistor piece 2, and the lead piece 5 is provided with a hole for connecting a power line.

[0024] Lead wire 5 can be installed on the two connection ends 21 of resistor 2 by laser welding, such as... Figure 1 A solder joint 51 is formed at the root of the lead piece 5.

[0025] More specifically, a mounting part 12, also known as a mounting area, is provided on one side of the main body 11, and a connecting part 13 is provided on the mounting part 12 to provide mounting space for the connecting part 13. Figure 1 In the middle, a mounting part 12 is provided on the left and right sides of the upper side of the main body 11.

[0026] The first mica sheet 31 and the second mica sheet 32 ​​can be bonded to the resistor sheet 2 with heat-resistant adhesive. The first bonding layer 41 and the second bonding layer 42 are respectively bonded to the first mica sheet 31 and the second mica sheet 32 ​​with heat-resistant adhesive. Figure 4 and Figure 5 This is a partial cross-sectional view of the present invention.

[0027] Example 2 provides a hierarchical structure for the lead sheet 5. For example... Figure 3 and Figure 4A third mica sheet 33 is provided on one side of the root of the lead piece 5 of the connecting part 13. The inner side of the third mica sheet 33 overlaps with the first mica sheet 31 or the second mica sheet 32. That is, the first mica sheet 31 covers the main body of the resistor piece 2 and exposes the two connecting ends 21 of the resistor piece 2; the third mica sheet 33 covers the root of the lead piece 5. After the lead piece 5 is welded (e.g., spot welded) to the connecting end 21, the third mica sheet 33 is installed. On the one hand, this avoids the solder slag from entering between the first mica sheet 31 and the resistor piece 2 during the welding process; on the other hand, it facilitates processing and improves assembly and production efficiency. The second mica sheet 32 ​​may cover the main body 11 and the connecting part 13, but is not limited to this.

[0028] Example 3, as Figure 6 Unlike Embodiment 1, one of the mounting portions 12 and the connecting portion 13 is located near the middle of the main body 11.

[0029] Figure 1 The resistors in the circuit are arranged in a serpentine pattern, but are not limited to this.

[0030] The novel heating element 1 of this utility model has an overall sheet-like structure. The first mica sheet 31 and the second mica sheet 32 ​​are disposed on opposite sides of the resistive sheet 2. The first bonding layer 41 and the second bonding layer 42 are respectively disposed on the outer sides of the first mica sheet 31 and the second mica sheet 32. While providing protection for the mica sheet, it improves the adhesion of the heated surface, reduces gaps, improves heat transfer efficiency, and also increases the insulation thickness to ensure the insulation of the heating element.

[0031] This utility model also optimizes the installation structure of the lead sheet 5, and facilitates installation through the cooperation of the third mica sheet 33 and the first mica sheet 31.

[0032] It should be noted that the terms "first" and "second" in this article are used to distinguish different components, devices, modules, etc., and do not represent a chronological order, nor do they limit "first" and "second" to different types.

[0033] It should also be noted that, without conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0034] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A novel heating element, characterized in that, It includes a main body (11) and a connecting part (13) disposed on the main body (11); The main body (11) includes a first bonding layer (41), a first mica sheet (31), a resistor sheet (2), a second mica sheet (32), and a second bonding layer (42) stacked in sequence, wherein the resistor sheet (2) is connected to the connecting part (13).

2. The novel heating element according to claim 1, characterized in that, The first bonding layer (41) and the second bonding layer (42) are silicone parts or silicone sheets.

3. The novel heating element according to claim 1, characterized in that, The connecting part (13) is provided with a lead piece (5) that is connected to the resistor piece (2), and the lead piece (5) is provided with a hole for connecting a power line.

4. The novel heating element according to claim 3, characterized in that, A mounting part (12) is provided on one side of the main body (11), and a connecting part (13) is provided on the mounting part (12); The lead wire (5) is installed on the connection end (21) of the resistor (2) by welding.

5. The novel heating element according to claim 3, characterized in that, A third mica sheet (33) is provided on one side of the root of the lead sheet (5), and the inner side of the third mica sheet (33) overlaps with the first mica sheet (31).

6. The novel heating element according to claim 5, characterized in that, The first mica sheet (31) covers the main body of the resistor sheet (2) and exposes the two connection ends (21) of the resistor sheet (2).

7. The novel heating element according to claim 1, characterized in that, One mounting part (12) and the connecting part (13) are located near the middle of the main body (11), and the other connecting part (13) is located near the left or right side of the upper side of the main body (11); or Two connecting parts (13) are respectively located on the left and right sides of the upper side of the main body (11).

8. The novel heating element according to claim 1, characterized in that, The novel heating element (1) has a sheet-like structure; the resistive element (2) has a serpentine structure.

9. The novel heating element according to claim 1, characterized in that, The first mica sheet (31) and the second mica sheet (32) are bonded to the resistor sheet (2) with heat-resistant adhesive; the first bonding layer (41) and the second bonding layer (42) are bonded to the first mica sheet (31) and the second mica sheet (32) respectively with heat-resistant adhesive.

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