Waterproof electric heating plate and electric cooking device

Abstract

A waterproof electric heating disc includes an upper cover, a heating core plate, a cover, and upper and lower insulation assemblies arranged between the upper cover and the heating core plate and between the heating core plate and the cover. A mica sheet is arranged between the lower insulation assembly and the cover. The mica sheet is provided with a wiring position corresponding to a wiring terminal arranged on the cover. The wiring terminal is located in an annular area between 72.5% and 45% of the radius of the cover. The heating wire is bent in the direction of the circular hole after passing through the lower insulation assembly, and is led out through the wiring position and connected to the wiring terminal. The position of the threading hole of the heating wire is adjusted by the mica sheet, so that the original threading hole is not changed. The position of the threading hole is changed by bending the heating wire and insulating the heating wire with the mica sheet, without reducing the heating area and achieving direct connection with the wiring terminal. The wiring terminal is moved inward, improving the waterproof effect of the electric heating disc.

Description

Technical Field

[0001] This utility model relates to the field of electric heating equipment technology, specifically a waterproof electric heating plate and an electric cooking device. Background Technology

[0002] Heating with electric heating wires utilizes the principle of resistance heating in conductive materials, generating heat by passing an electric current through the heating wire. Electric heating wire devices are simple in structure, low in manufacturing cost, and easy to use. They are widely used in cooking appliances, industrial equipment, and medical devices. They feature rapid heating, uniform heating, and high reliability; furthermore, the temperature of electric heating wire devices can be precisely controlled, making them suitable for applications requiring precise temperature control.

[0003] The existing wiring terminals are located on the edge of the cover. If water gets into the electric cooking device after installation, the wiring terminals may become wet and malfunction.

[0004] When the terminal block is moved inward, i.e., towards the center of the cover, the position of the heating wire needs to be adjusted accordingly. Moving the position inward will reduce the heating area of ​​the heating wire.

[0005] Therefore, there is an urgent need to provide an electric heating plate that can achieve waterproofing without reducing the heating area. Summary of the Invention

[0006] The purpose of this invention is to provide a waterproof electric heating plate with good waterproof effect and no reduction in heating area, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A waterproof electric heating plate, characterized in that it includes an upper cover, a heating core plate, a sealing cover, and upper and lower insulating components disposed between the upper cover and the heating core plate, and between the heating core plate and the sealing cover.

[0009] The upper cover is fixedly connected to the sealing cover. When the sealing cover is connected to the upper cover, the lower insulating component, the heating core plate, and the upper insulating component abut against the upper cover.

[0010] The heating core plate has a slot around its perimeter, and the heating wire is wound in the slot. The heating wire extends from the upper part of the heating core plate, passes through the lower insulation assembly, and connects to the wiring terminals of the cover.

[0011] A mica sheet is provided, located between the lower insulating component and the cover. The mica sheet has wiring positions that correspond to the wiring terminals provided on the cover.

[0012] The wiring terminals are located in an annular region between 72.5% and 45% of the radius of the cover.

[0013] The heating wire extends from the lower insulating component, bends towards the circular hole, and is then led out through the wiring position to connect to the wiring terminal.

[0014] The upper insulating component includes a first insulating mica sheet and a second insulating mica sheet, which are stacked together. The second insulating mica sheet is disposed between the first insulating mica sheet and the heating core plate. The second insulating mica sheet has a cut slit along its outer periphery towards the center.

[0015] The lower insulation component includes a third insulating mica sheet and a fourth insulating mica sheet, which are stacked together. The third insulating mica sheet is disposed between the fourth insulating mica sheet and the heating core plate. The third insulating mica sheet has a cut slit along its outer periphery towards the center.

[0016] The top cover is configured as a concave arc shape, the first insulating mica sheet is in close contact with the inner surface of the top cover, and the third insulating mica sheet is in close contact with the lower surface of the heating core plate.

[0017] The upper cover is configured as an outwardly convex arc shape, the first insulating mica sheet is in close contact with the inner surface of the upper cover, and the third insulating mica sheet is in close contact with the lower surface of the heating core plate.

[0018] The thickness of the first insulating mica sheet and the second insulating mica sheet is 0.15 mm to 0.3 mm.

[0019] The thickness of the third insulating mica sheet and the fourth insulating mica sheet is 0.15 mm to 0.3 mm.

[0020] The wiring terminal is provided with a round hole, and the heating wire passes through the round hole.

[0021] The wiring position is provided with a wire groove, which extends outward from the center and is a conical groove with a large center and a small radius.

[0022] The heating core plate is provided with a slot around its periphery, and the heating wire is wrapped around the slot.

[0023] The first insulating mica sheet is the same size as the second insulating mica sheet, and the third insulating mica sheet is the same size as the fourth insulating mica sheet.

[0024] A heat-insulating mica sheet is provided between the lower insulation component and the cover.

[0025] Another objective of this invention is to provide an electric cooking device, including the aforementioned waterproof heating plate and container.

[0026] Beneficial effects:

[0027] The position of the wire threading hole is adjusted by using mica sheets, without changing the original wire threading hole. By bending the heating wire and insulating it with mica sheets, the position of the wire threading hole is changed. This not only does not reduce the heating area, but also achieves direct connection with the terminal block. Moving the terminal block inward improves the waterproof effect of the heating plate. Attached Figure Description

[0028] To more clearly illustrate the solutions in this application, the accompanying drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of the waterproof electric heating plate of this utility model;

[0030] Figure 2 This is a schematic diagram of the structure of the top cover of this utility model;

[0031] Figure 3 This is a schematic diagram of the structure of the cap of this utility model;

[0032] Figure 4 This is a schematic diagram of the heating core plate of this utility model.

[0033] Figure 5 This is an exploded structural diagram of the waterproof electric heating plate of this utility model;

[0034] Figure 6 This is a schematic diagram of the concave top cover electric cooking device of this utility model;

[0035] Figure 7 This is a schematic diagram of the structure of the convex top cover electric cooking device of this utility model.

[0036] Figure 8 This is a schematic diagram of the structure of the present invention, where the wiring position is a circular hole;

[0037] Figure 9 This is a schematic diagram of the wiring position of the present invention, which is a wire groove.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1 - Top cover

[0040] 101 – Circular body, 102 – Outer reinforcing edge, 103 – Inner reinforcing edge, 104 – Through hole, 105 – Texture.

[0041] 2 – Insulating mica sheet; 201 – First insulating mica sheet; 202 – Second insulating mica sheet; 203 – Third insulating mica sheet; 204 – Fourth insulating mica sheet; 205 – Cut seam; 206 – Upper insulating component; 207 – Lower insulating component; 2031 – Wire hole for the third insulating mica sheet; 2041 – Wire hole for the fourth insulating mica sheet.

[0042] 3 – Heating core plate, 301 – Slot, 302 – First mica fixing plate, 303 – Second mica fixing plate, 304 – Heating wire, 3041 – Heating wire threading hole

[0043] 4 – Cover, 401 – Dotted protrusions, 402 – Terminal block

[0044] 5 – Insulating mica sheet, 6 – Electric heating container, 7 – Mica sheet, 701 – Round hole, 702 – Cable trough. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application, are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0047] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0048] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0049] electric heating plate, such as Figures 1 to 9As shown, the device includes an upper cover 1, a heating element, and a sealing cover 4. The heating element includes a heating core plate 3, which is located between the upper cover 1 and the sealing cover 4. The upper surface of the heating core plate 3 is in contact with the upper cover 1. Insulating mica sheets 2 are provided on the upper and lower layers of the heating core plate 3, and the insulating mica sheets 2 are in contact with the sealing cover 4 and the upper cover 1.

[0050] The heating core plate 3 is provided with a slot 301 around its periphery, and the heating wire 304 is wound in the slot 301. The edge of the upper cover 1 is fixedly connected to the sealing cover 4.

[0051] The top cover 1 has good thermal conductivity and high thermal efficiency, which can diffuse the heat generated by the heating core plate 3 to the electric heating container.

[0052] The top cover 1 can be made of aluminum or aluminum alloy, with a thickness of 0.4 to 1 mm. Preferably, it is 0.4 to 0.6 mm. The surface of the annular body 101 on the top cover 1 is provided with texture 105.

[0053] The surface of the cover 4 is provided with a plurality of dot-shaped protrusions 401, which are arranged along the circumference and are staggered among the multiple rows of dot-shaped protrusions 401.

[0054] The upper cover 1 includes a circular body 101, an outer reinforcing edge 102, and an inner reinforcing edge 103. The inner reinforcing edge 103 extends downward from the through hole 104 in the middle of the circular body 101. The outer reinforcing edge 102 extends downward from the circumference of the circular body 101. The sealing cover 4 has a circular hole corresponding to the through hole 104. The heating core plate 3 has a notch corresponding to the inner reinforcing edge 103.

[0055] The outer reinforcing edge 102 is rolled inward from the outside to connect with the edge of the cover 4.

[0056] The inner reinforcing edge 103 is rolled and connected to the edge of the cover 4 from the inside out.

[0057] The aforementioned rolled edge connection is formed by bending the outer reinforcing edge 102 inward and the edge of the cover 4 as a whole, and bending the inner reinforcing edge 103 outward and the edge of the cover 4 as a whole.

[0058] The outer reinforcing edge 102 and the inner reinforcing edge 103 can significantly enhance the overall rigidity and strength of the top cover 1, and will not cause the top cover 1 to deform during use and processing.

[0059] The outer surface of the ring body 101 is provided with texture 105, which covers the surface of the ring. It can maintain good structural rigidity and machinability even when the thickness of the ring body 101 is extremely low, making it easy to process.

[0060] The heating core plate 3 includes a first mica fixing piece 302 and a second mica fixing piece 303, both of which are semi-circular rings.

[0061] The first mica fixing plate 302 and the second mica fixing plate 303 are respectively provided with equally spaced slots 301; the heating wire 304 is wound into the first mica fixing plate 302 and out of the slot 301 of the second mica plate.

[0062] The insulating mica sheet 2 is configured as an upper insulating component 206 and a lower insulating component 207. The upper cover 1 is configured as an arc shape. The upper cover 1 is fixedly connected to the sealing cover 4. When the sealing cover 4 is connected to the upper cover 1, the lower insulating component 207, the heating core plate 3, and the upper insulating component 206 abut against the upper cover 1.

[0063] The upper insulating component 206 includes a first insulating mica sheet 201 and a second insulating mica sheet 202. The first insulating mica sheet 201 and the second insulating mica sheet 202 are stacked. The second insulating mica sheet 202 is disposed between the first insulating mica sheet 201 and the heating core plate 3. The second insulating mica sheet 202 has a cut slit 205 along its outer periphery towards the center.

[0064] A cut slit 205 is provided in the second insulating mica sheet 202 to increase the deformation of the second insulating mica sheet 202, so that it can fit the arc-shaped upper cover 1 and avoid contact gaps that could lead to insulation failure. The first insulating mica sheet 201 is used to further block the second insulating mica sheet 202. The installation is simple and the insulation effect is good.

[0065] The lower insulation component 207 includes a third insulating mica sheet 203 and a fourth insulating mica sheet 204, which are stacked together. The third insulating mica sheet 203 is disposed between the fourth insulating mica sheet 204 and the heating core plate 3. The third insulating mica sheet 203 has a cut slit 205 along its outer periphery towards the center.

[0066] A cut slit 205 is provided in the third insulating mica sheet 203 to increase the deformation of the third insulating mica sheet 203, so that it can fit the arc-shaped upper cover 1 and avoid contact gaps that could lead to insulation failure. The fourth insulating mica sheet 204 is used to further block the third insulating mica sheet 203. The installation is simple and the insulation effect is good.

[0067] The upper cover 1 is configured as a concave arc shape, with the first insulating mica sheet 201 tightly attached to the inner surface of the upper cover, and the third insulating mica sheet 203 tightly attached to the lower surface of the heating core plate 3. Alternatively, the upper cover 1 can be configured as a convex arc shape, with the first insulating mica sheet 201 tightly attached to the inner surface of the upper cover 1, and the third insulating mica sheet 203 tightly attached to the lower surface of the heating core plate 3.

[0068] The second insulating mica sheet 202 and the fourth insulating mica sheet 204 do not have cutting seams 205, which facilitates processing. During installation, there is no need to stagger the first insulating mica sheet 201 and the second insulating mica sheet 202, because if both insulating mica sheets have cutting seams 205, they need to be staggered to avoid overlapping of the cutting seams 205, which would lead to insulation failure.

[0069] This invention employs a thinner second insulating mica sheet 202 and a fourth insulating mica sheet 204 to cover a first insulating mica sheet 201 and a third insulating mica sheet 203. The thickness of the first insulating mica sheet 201 and the second insulating mica sheet 202 is 0.15 mm to 0.3 mm. The thickness of the third insulating mica sheet 203 and the fourth insulating mica sheet 204 is 15 mm to 0.3 mm.

[0070] The insulating mica sheet used in this way is extremely thin, and even if some deformation occurs, it can still cover the cut seam 205, thereby achieving the insulation effect.

[0071] The first insulating mica sheet 201 is the same size as the second insulating mica sheet 202, and the third insulating mica sheet 203 is the same size as the fourth insulating mica sheet 204.

[0072] Using insulating mica sheets of the same size facilitates installation, and the consistent specifications make processing easier.

[0073] A heat-insulating mica sheet 5 is provided between the lower insulating component 207 and the cover 4. The heat-insulating mica sheet 5 is used to block the heat conduction of the heating core plate 3 downward to the cover 4 and dissipate it, thereby reducing the temperature below the cover 4 and reducing the ambient temperature below the heating plate after the electric heating plate is installed in the electric cooking device, thus improving the life of the electric cooking device.

[0074] The heating wire 304 extends from the upper part of the heating core plate 3, passes through the lower insulation component 207, and connects to the terminal 402 of the cover 4. A mica sheet 7 is provided, located between the lower insulation component 207 and the cover 4. The mica sheet 7 is provided with a wiring position, which corresponds to the wiring terminal 402 provided on the cover 4. The wiring terminal 402 is located in an annular area between 72.5% and 45% of the radius of the cover 4. After the heating wire 304 extends out of the lower insulation component 207, it bends towards the circular hole and then extends through the wiring position to connect to the wiring terminal 402.

[0075] The back of the heating core plate 3 is provided with a heating wire threading hole 3041. After the heating wire 304 is wound through the slot 301 of the heating core plate 3, it comes out through the heating wire threading hole 3041. The heating wire threading hole 3041 can also be set as a heating wire 304 threading groove. After the heating wire 304 passes through the heating wire threading hole 3041, passes through the third insulating mica sheet threading hole 2031 and the fourth insulating mica sheet threading hole 2041, bends a section in the direction of the center, and then passes out from the wiring position to connect with the wiring terminal 402.

[0076] Of course, the third insulating mica sheet 203 and the fourth insulating mica sheet 204 can also be set as a single layer of insulating mica sheet. After the heating wire 304 passes through the heating wire hole 3041, it passes through the insulating mica sheet, bends a certain distance, and then passes through the wiring position of the mica sheet 7.

[0077] The wiring position can be set in two forms, distributed as a round hole 701 or a wire groove 702. The wiring position is provided with a round hole 701, and the heating wire 304 passes through the round hole 701.

[0078] The wiring position is provided with a wire groove 702, which extends outward from the center and is a conical groove with a large center and a small radius.

[0079] The circular hole 701 at the wiring position has the same or larger diameter as the through hole of the lower insulating component 207, facilitating the wire to pass through the wiring position. After passing through the through hole, the heating wire 304 bends a certain distance towards the center between the mica sheet 7 and the fourth insulating sheet 204 before exiting from the wiring position. The mica sheet 7 is located between the fourth insulating sheet 204 and the cover 4, providing good insulation and also providing a wiring position corresponding to the mounting hole of the terminal 402 on the cover 4.

[0080] Terminal block 402 is typically fixed via terminal block 402 mounting holes.

[0081] This utility model can also provide a wire groove 702 at the wiring position. By using a bottom-wide and top-narrow design, the heating wire 304 can be directly inserted through the wire groove 702 during installation, avoiding the delicate operation of drilling and improving installation efficiency.

[0082] Another objective of this invention is to provide an electric cooking device, including the aforementioned waterproof heating plate and electric cooking container. The electric heating container 6 of this invention can be configured as an arc-shaped pot or a frying pan, etc. This invention provides a convex heating plate and a concave heating plate, which are variations in the shape of the upper cover 1 to match the corresponding shape of the electric heating container 6.

[0083] In this invention, the center of the circle is the center of the heating plate, and the radius direction is the radial direction extending from the center of the circle to the outer ring of the heating plate.

[0084] Obviously, the embodiments described above are only some embodiments of this application, not all embodiments. The accompanying drawings show preferred embodiments of this application, but do not limit the patent scope of this application. This application can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this application's specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the scope of patent protection of this application.

Claims

1. A waterproof electric hot plate characterized by: It includes a top cover, a heating core plate, a sealing cover, and upper and lower insulation components disposed between the top cover and the heating core plate, and between the heating core plate and the sealing cover. The upper cover is fixedly connected to the sealing cover. When the sealing cover is connected to the upper cover, the lower insulating component, the heating core plate, and the upper insulating component abut against the upper cover. The heating core plate has a groove around its periphery, and a heating wire is wound around it. The heating wire extends from the upper part of the heating core plate, passes through the lower insulation component, and connects to the wiring terminals of the cover. A mica sheet is provided between the lower insulation component and the cover, and the mica sheet has wiring positions corresponding to the wiring terminals on the cover. The wiring terminals are located in an annular region between 72.5% and 45% of the radius of the cover. The heating wire extends from the lower insulating component, bends towards the circular hole, and is then led out through the wiring position to connect to the wiring terminal.

2. A waterproof electric hot plate according to claim 1, characterized in that: The upper insulating component includes a first insulating mica sheet and a second insulating mica sheet, which are stacked together. The second insulating mica sheet is disposed between the first insulating mica sheet and the heating core plate. The second insulating mica sheet has a cut slit along its outer periphery towards the center.

3. A waterproof electric hot plate according to claim 2, characterized in that: The lower insulation component includes a third insulating mica sheet and a fourth insulating mica sheet, which are stacked together. The third insulating mica sheet is disposed between the fourth insulating mica sheet and the heating core plate. The third insulating mica sheet has a cut slit along its outer periphery towards the center.

4. A waterproof electric hot plate according to claim 3, characterized in that: The top cover is configured as a concave arc shape, the first insulating mica sheet is in close contact with the inner surface of the top cover, and the third insulating mica sheet is in close contact with the lower surface of the heating core plate.

5. A waterproof electric hot plate according to claim 3, characterized in that: The upper cover is configured as an outwardly convex arc shape, the first insulating mica sheet is in close contact with the inner surface of the upper cover, and the third insulating mica sheet is in close contact with the lower surface of the heating core plate.

6. A waterproof electric heating plate according to claim 3, characterized in that: The thickness of the first insulating mica sheet and the second insulating mica sheet is 0.15mm~0.3mm; the thickness of the third insulating mica sheet and the fourth insulating mica sheet is 0.15mm~0.3mm.

7. A waterproof electric hot plate according to claim 1, characterized in that: The wiring terminal is provided with a round hole, and the heating wire passes through the round hole.

8. A waterproof electric hot plate according to claim 1, characterized in that: The wiring position is provided with a wire groove, which extends outward from the center and is a conical groove with a large center and a small radius.

9. An electric cooking device, characterized by: Includes the waterproof electric heating plate and electric cooking container as described in any one of claims 1 to 8.

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