Electric heater

Abstract

The utility model provides an electric heater, which comprises a substrate (10), an electric heating coating (20) and electrode plates (30), the electric heating coating (20) is positioned on one side of the substrate (10), the two electrode plates (30) are attached to two ends of the electric heating coating (20), the electrode plates (30) are connected with a power line (60), an insulating layer (40) is arranged between the substrate (10) and the electric heating coating (20), and the substrate (10) and the electric heating coating (20) are electrically isolated by the insulating layer (40); a conducting layer (50) is arranged on the surface of one side of the substrate (10), the conducting layer (50) completely or partially covers the substrate (10), and the grounding lead (70) is electrically connected with the conducting layer (50). The safety performance is greatly improved, the safety standard is met, and product authentication is easy to pass.

Description

Technical Field

[0001] The utility model relates to an electric heater. Background Art

[0002] Graphene coating generates heat when powered on and is widely used in heating appliances such as electric kettles and hot plates due to its extremely high heat conversion rate. However, as a heating component, graphene coating will oxidize under high temperature conditions, causing the heating temperature of the coating to decrease and the product life to decline too quickly. Its structure is as follows Figure 1 、 Figure 2 、 Figure 3 As shown, it includes a substrate, an electric heating coating, an electrode sheet and a power line.

[0003] The patent number is: CN202122141232, 7 and is named: An insulating graphene heating coating - utility model patent basically solves the above technical problems, but the current heaters that generate heat after the coating is energized still have the following problems: 1) Because the material of the substrate to which the electric heating coating (such as the graphene coating) is attached contains impurities, when the coating generates heat after being energized, static electricity will be generated on the substrate. In addition, in order to meet safety requirements, electric heaters usually need to undergo high-voltage testing. When performing high-voltage testing or when the substrate is damaged, there is a risk of leakage, resulting in the product not meeting safety standards and being difficult to pass certification; 2) The grounding lead of the current electric heater product is connected to the outer casing instead of directly connected to the substrate. Therefore, it cannot quickly lead the static electricity or leakage at all positions on the substrate to the ground, which does not meet the product's safety requirements. Utility Model Content

[0004] The purpose of the utility model is to provide an electric heater to solve the technical problems in the prior art that, because the material of the substrate to which the electric heating coating is attached contains impurities, static electricity is generated on the substrate when the electric heating coating is energized and generates heat. In addition, there is a risk of leakage when the electric heater is subjected to high-voltage testing or when the substrate is damaged, resulting in insufficient safety and difficulty in passing safety certification.

[0005] The utility model is realized through the following technical solutions:

[0006] An electric heater comprises a substrate, an electric heating coating and an electrode sheet, wherein the electric heating coating is located on one side of the substrate, two electrode sheets are attached to both ends of the electric heating coating, and the electrode sheets are connected to a power line. The electric heater is characterized in that: an insulating layer is provided between the substrate and the electric heating coating, and the insulating layer electrically isolates the substrate from the electric heating coating; a conductive layer is provided on the surface of one side of the substrate, and the conductive layer fully or partially covers the substrate, and a grounding lead is electrically connected to the conductive layer.

[0007] Preferably, the conductive layer and the insulating layer are located on the same side of the substrate, and the insulating layer is located between the conductive layer and the electric heating coating.

[0008] Preferably, the substrate is made of non-metallic material, and the non-metallic material is ceramic, silicon carbide, quartz glass, enamel, zircon sand, microcrystalline glass, carbon crystal, or carbon fiber.

[0009] Preferably, the electric heating coating is a graphene heating coating.

[0010] Preferably, the conductive layer is integral with the insulating layer.

[0011] Preferably, the conductive layer and the insulating layer are located on both sides of the substrate.

[0012] Preferably, the conductive layer has a grid structure consisting of a plurality of vertical lines and a plurality of horizontal lines, and the grid structure partially covers the substrate.

[0013] Preferably, the distance between two adjacent vertical lines is less than 1 mm, and the distance between two adjacent horizontal lines is less than 1 mm.

[0014] Preferably, an outer cover is installed on one side of the substrate, and the outer cover covers the outside of the insulating layer, the conductive layer, the electric heating coating and the electrode sheet.

[0015] An electric heater comprises a substrate, an electric heating coating and an electrode sheet, wherein the electric heating coating is located on one side of the substrate, two electrode sheets are joined at both ends of the electric heating coating, and the electrode sheets are connected to a power line. The electric heater is characterized in that a conductive layer is provided on the other side of the substrate, the conductive layer fully or partially covers the substrate, a ground lead is electrically connected to the conductive layer, an insulating layer is further provided on the conductive layer, and the conductive layer is located between the insulating layer and the substrate.

[0016] The beneficial effects of the present invention are:

[0017] The utility model provides an insulating layer between the substrate and the electric heating coating, which electrically isolates the substrate from the electric heating coating. When the electric heating coating generates heat after being energized, static electricity will not be generated on the substrate, nor will it be introduced to the ground when leakage occurs (or during high-voltage testing or when the substrate is damaged); a conductive layer is provided on the surface of one side of the substrate, which covers all or part of the substrate, and a grounding lead is electrically connected to the conductive layer. The conductive layer can more quickly and effectively lead static electricity or leakage at all positions on the substrate to the ground, thereby improving product safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other purposes, features and advantages of the present invention will become more apparent through a more detailed description of the preferred embodiments of the present invention shown in the accompanying drawings. The same reference numerals indicate the same parts throughout the accompanying drawings, and the drawings are not intentionally scaled to actual size, but rather are intended to illustrate the subject matter of the present invention.

[0019] Figure 1 A perspective view of a conventional electric heater;

[0020] Figure 2 It is a bottom view of a conventional electric heater;

[0021] Figure 3 for Figure 2 A-A sectional view;

[0022] Figure 4 This is a three-dimensional diagram of the electric heater according to the first embodiment of the present invention;

[0023] Figure 5 This is a bottom view of the electric heater according to the first embodiment of the present invention;

[0024] Figure 6 for Figure 5 Middle B-B sectional view;

[0025] Figure 7 It is a structural schematic diagram of the insulating layer of the utility model;

[0026] Figure 8 This is a cross-sectional view of the structure of the electric heater according to the second embodiment of the present invention;

[0027] Figure 9 This is a structural cross-sectional view of the electric heater according to the third embodiment of the present invention. DETAILED DESCRIPTION

[0028] In order to facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings.

[0029] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element and integrated therewith, or there may be an intermediate element. The terms "mounted", "one end", "the other end" and similar expressions used herein are for illustrative purposes only.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] refer to Figure 4 、 Figure 5 and Figure 6As shown, an embodiment of the present invention provides an electric heater, comprising a substrate 10, an electric heating coating 20 and an electrode sheet 30, wherein the electric heating coating 20 is located on one side of the substrate 10, and two electrode sheets 30 are attached to both ends of the electric heating coating 20, and the electrode sheets 30 are connected to a power line 60. The invention is characterized in that: an insulating layer 40 is provided between the substrate 10 and the electric heating coating 20, and the insulating layer 40 electrically isolates the substrate 10 from the electric heating coating 20; a conductive layer 50 is provided on one surface of the substrate 10, and the conductive layer 50 fully or partially covers the substrate 10, and a grounding lead 70 is electrically connected to the conductive layer 50.

[0032] Preferably, the conductive layer 50 and the insulating layer 40 are located on the same side of the substrate 10 , and the insulating layer 40 is located between the conductive layer 50 and the electric heating coating 20 .

[0033] Preferably, the substrate 10 is made of non-metallic material, and the non-metallic material is ceramic, silicon carbide, quartz glass, enamel, zircon sand, microcrystalline glass, carbon crystal, or carbon fiber.

[0034] Preferably, the electric heating coating 20 is a graphene heating coating.

[0035] Preferably, the conductive layer 50 is integrated with the insulating layer 40. For example, tin foil is used, where one side of the tin foil is conductive and the other side is insulating.

[0036] like Figure 7 As shown, the conductive layer 50 preferably comprises a grid structure consisting of a plurality of vertical and horizontal lines, with the grid structure partially covering the substrate 10. The spacing between adjacent vertical lines is less than 1 mm, and the spacing between adjacent horizontal lines is less than 1 mm. This structure can reduce the material usage of the conductive layer 50, saving costs. Of course, it is best if the conductive layer 50 fully covers one side of the substrate 10 for greater safety.

[0037] Preferably, the electric heating coating 20 is a rectangular parallelepiped or a cube, and has a simple structure.

[0038] The beneficial effects of the present invention are:

[0039] The present invention provides an insulating layer between the substrate and the electric heating coating. The insulating layer electrically isolates the substrate from the electric heating coating. When the electric heating coating is energized and generates heat, static electricity will not be generated on the substrate or introduced to the ground in the event of leakage (or during high-voltage testing or when the substrate is damaged); a conductive layer is provided on one side of the substrate, the conductive layer fully or partially covering the substrate, and a grounding lead is electrically connected to the conductive layer. The conductive layer can more quickly and effectively lead static electricity or leakage at all locations on the substrate to the ground, thereby improving product safety. It significantly improves safety performance, meets safety standards, and is easy to pass product certification. Existing electric heaters do not meet safety requirements without this grounding coating (i.e., the conductive layer 50).

[0040] Example 2:

[0041] This embodiment is an improvement on the first embodiment, with the following changes: Figure 8 As shown, the conductive layer 50 and the insulating layer 40 are respectively located on two sides of the substrate 10 .

[0042] Preferably, a cover 80 is installed on one side of the substrate 10, and the cover 80 covers the outside of the insulating layer 40, the conductive layer 50, the electric heating coating 20 and the electrode sheet 30. The structure is reasonable and the integrity is good, and the cover 80 plays a good protective role.

[0043] Example 3:

[0044] This embodiment is an improvement on the first embodiment, with the following changes: Figure 9 As shown, an electric heater includes a substrate 10, an electric heating coating 20 and an electrode sheet 30. The electric heating coating 20 is located on one side of the substrate 10, and two electrode sheets 30 are attached to both ends of the electric heating coating 20. The electrode sheets 30 are connected to a power line 60. The electric heater is characterized in that a conductive layer 50 is provided on the other side of the substrate 10, and the conductive layer 50 fully or partially covers the substrate 10. A grounding lead 70 is electrically connected to the conductive layer 50. An insulating layer 40 is further provided on the conductive layer 50, and the conductive layer 50 is located between the insulating layer 40 and the substrate 10.

[0045] The present invention provides a conductive layer 50 on the other side of the substrate 10, which fully or partially covers the substrate 10. A grounding lead 70 is electrically connected to the conductive layer 50. An insulating layer 40 is also provided on the conductive layer 50, located between the insulating layer 40 and the substrate 10. When the electric heating coating 20 is energized and generates heat, static electricity will not be generated on the substrate, nor will it be introduced to the ground in the event of leakage (or during high-voltage testing or when the substrate is damaged). A conductive layer is provided on one surface of the substrate, which fully or partially covers the substrate. A grounding lead is electrically connected to the conductive layer. The conductive layer can more quickly and effectively conduct static electricity or leakage at all locations on the substrate to the ground, thereby improving product safety. This significantly improves safety performance, complies with safety standards, and easily passes product certification.

[0046] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0047] The above embodiments merely represent specific implementations of the utility model. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the utility model, and these modifications and improvements fall within the scope of protection of the utility model. Therefore, the scope of protection of the utility model patent shall be determined by the appended claims.

Claims

1. An electric heater, comprising a substrate (10), an electric heating coating (20) and an electrode sheet (30), wherein the electric heating coating (20) is located on one side of the substrate (10), two electrode sheets (30) are attached to both ends of the electric heating coating (20), and the electrode sheets (30) are connected to a power line (60), characterized in that: An insulating layer (40) is provided between the substrate (10) and the electric heating coating (20), wherein the insulating layer (40) electrically isolates the substrate (10) from the electric heating coating (20); A conductive layer (50) is provided on one side surface of the substrate (10), the conductive layer (50) completely or partially covers the substrate (10), and a grounding lead (70) is electrically connected to the conductive layer (50).

2. An electric heater according to claim 1, characterized in that: The conductive layer (50) and the insulating layer (40) are located on the same side of the substrate (10), and the insulating layer (40) is located between the conductive layer (50) and the electric heating coating (20).

3. An electric heater according to claim 2, characterized in that: The substrate (10) is made of non-metallic material, and the non-metallic material is ceramic or silicon carbide or quartz glass or enamel or zircon sand or microcrystalline glass or carbon crystal or carbon fiber or.

4. An electric heater according to claim 3, characterized in that: The electric heating coating (20) is a graphene heating coating.

5. An electric heater according to claim 4, characterized in that: The conductive layer (50) is integrated with the insulating layer (40).

6. The electric heater according to claim 1, wherein: The conductive layer (50) and the insulating layer (40) are respectively located on two sides of the substrate (10).

7. An electric heater according to any one of claims 1 to 6, characterized in that: The conductive layer (50) comprises a grid structure composed of a plurality of vertical lines and a plurality of horizontal lines, and the grid structure partially covers the substrate (10).

8. An electric heater according to claim 7, characterized in that: The distance between two adjacent vertical lines is less than 1mm, and the distance between two adjacent horizontal lines is less than 1mm.

9. An electric heater according to any one of claims 1 to 6, characterized in that: An outer cover (80) is installed on one side of the substrate (10), and the outer cover (80) covers the outside of the insulating layer (40), the conductive layer (50), the electric heating coating (20) and the electrode sheet (30).

10. An electric heater, comprising a substrate (10), an electric heating coating (20) and an electrode sheet (30), wherein the electric heating coating (20) is located on one side of the substrate (10), two electrode sheets (30) are attached to both ends of the electric heating coating (20), and the electrode sheets (30) are connected to a power line (60), characterized in that: A conductive layer (50) is provided on the other side of the substrate (10), the conductive layer (50) completely or partially covering the substrate (10), a grounding lead (70) is electrically connected to the conductive layer (50), an insulating layer (40) is further provided on the conductive layer (50), and the conductive layer (50) is located between the insulating layer (40) and the substrate (10).

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