Integrated NTC (Negative Temperature Coefficient) electric boiling device
By integrating an NTC sensor into the heating plate assembly and using a raised design to seal it to the kettle body, the problem of water leakage from the sealing ring is solved, achieving a heating plate design with high sealing performance and long lifespan.
Patent Information
- Application Number
- CN202510702686.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-28
- Publication Date
- 2025-12-12
AI Technical Summary
When an existing NTC sensor is installed by drilling a hole on the outside of the heating plate, the sealing ring is prone to water leakage, which can damage the heating plate structure and reduce its lifespan.
The NTC sensor is integrated into the heating plate assembly by adopting a raised design on the heating base and is sealed to the pot body through an annular groove, avoiding the use of a sealing ring and ensuring the sealing and stability of the heating plate.
The sealing of the heating plate has been improved, extending its service life, preventing water leakage, increasing thermal efficiency, and reducing production costs.
Smart Images
Figure CN121101348A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of kettle heating plate technology, specifically to an integrated NTC electric boiling device. Background Technology
[0002] Electric kettles are widely used in people's daily lives, and market competition is becoming increasingly fierce. For people who pursue a high-quality life, in addition to considering the product quality itself, they also have high requirements for the aesthetics of the product. The integrated design of the electric kettle eliminates the need for a separate heating plate, resulting in a compact connection and extremely convenient use.
[0003] Existing NTC sensors typically involve drilling a hole in the bottom of the kettle on the outside of the heating plate, embedding the NTC sensor in the hole, and sealing and insulating it with silicone to ensure that the exposed part of the probe is in contact with the water surface (the silicone should extend 5-20mm above the inside of the kettle bottom to prevent leakage).
[0004] However, the existing sealing ring is prone to leakage after repeated heating, and drilling damages the heating plate structure, which can easily lead to a reduction in the lifespan of the heating plate. Summary of the Invention
[0005] The purpose of this invention is to provide a highly integrated, long-life, one-piece NTC electric cooking device to solve the above-mentioned problems.
[0006] To achieve the above objectives, the present invention provides the following technical solution: This invention provides an integrated NTC electric cooking device, comprising a kettle body, a power supply, and a heating plate assembly. The heating plate assembly includes a panel, a heating element, an upper insulating mica sheet, a lower insulating mica sheet, and a cover. The upper insulating mica sheet, the heating element, and the lower insulating mica sheet are sequentially pressed and connected to the inner wall of the panel by the cover. The panel includes a body and a heating base. The heating base is located in the middle of the body, forming a recess for connecting the kettle body. The heating base forms the bottom of the kettle body. A protrusion is located in the middle of the heating base. An NTC sensor passes through the heating base, the heating component, the upper insulating mica sheet, and the lower insulating mica sheet and is fixedly connected to the cover. The upper surface of the NTC sensor abuts against the lower surface of the protrusion. The pot body is fixed in the recess, and the side wall of the main body is fixedly connected to the bottom of the pot body; The heating element, the upper insulating mica sheet, and the lower insulating mica sheet are provided with through holes corresponding to the NTC sensor; The cap is fixedly connected to the side of the main body; A controller is provided, which is electrically connected to the power supply, the heating plate assembly, and the NTC sensor.
[0007] The heating element is a heating wire disc, which is formed by laying a single heating wire horizontally. The starting end and the ending end are adjacent to each other. A connector is provided, which is distributed and connected to the starting end, the ending end, and the terminal block outside the cover through the lower insulating mica sheet.
[0008] The heating element includes a heating core plate. An upper insulating mica sheet and a lower insulating mica sheet are located above and below the heating core plate, respectively. The heating core plate includes a first mica sheet and a second mica sheet. Several slots are provided around the periphery of the first and second mica sheets. A heating wire is wound from the upper part of the first mica sheet, continuously wound within the slots, and then led out from the upper part of the second mica sheet, passing through the lower insulating mica sheet, a cover, and connecting to a terminal block. The spacing between the various card slots is the same.
[0009] The difference in spacing between several of the card slots is less than 5% to 20% of the spacing.
[0010] The lower insulating mica sheet is provided with a corresponding heating wire lead-out opening, and the heating wire is led out from the lead-out opening of the cover.
[0011] The terminal block includes a terminal block and a rivet. The heating wire is led out from the lead wire opening of the cover and passes through the terminal block. One part of the rivet is sleeved on the terminal block, and the other end is riveted to the cover by a rivet.
[0012] The surface of the panel is provided with an anodized layer.
[0013] An annular groove is provided between the main body and the heating base. The annular groove is formed by bending the edge of the heating base. The side of the kettle body is fixed in the annular groove and sealed to the annular groove.
[0014] The outer edge of the heating base protrudes and then extends downwards to be integrally formed with the body.
[0015] The beneficial effects are: The NTC sensor is integrated into the heating plate assembly via the protrusions on the heating base, resulting in a high degree of sealing between the heating plate assembly and the kettle body, and a long lifespan. The concave-convex design of the heating base ensures stable fixation of the electric cooking device, and the annular groove design can prevent minor leaks without corroding the interior of the heating plate, thus extending its service life. Furthermore, the heating plate uses a heating core plate, which has a large heating area, low production cost, and high thermal efficiency. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a cross-sectional view of the integrated heating plate of the present invention; Figure 2 This is an exploded structural diagram of the integrated heating plate of the present invention; Figure 3 This is a schematic diagram of the structure of the faceplate of the present invention; Figure 4 This is the invention Figure 1 A schematic diagram of the local method; Figure 5 This is a schematic diagram of the exploded structure from another angle of the present invention; Figure 6 This is a schematic diagram of the structure of the cap of the present invention; Figure 7 This is a schematic diagram of the exploded structure from another angle of the present invention.
[0018] The annotations in the attached figures are explained as follows: 1-Panel, 101-Protrusion, 2-NTC sensor, 3-Upper insulating mica sheet, 4-Heating component, 401-First mica sheet, 402-Second mica sheet, 403-Heating wire, 404-Slot, 5-Lower insulating mica sheet, 6-Cap, 7-Rivet, 8-Riveting piece, 9-Terminal. Detailed Implementation
[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.
[0020] An integrated NTC electric cooking device includes a kettle body and a heating plate assembly. The heating plate assembly includes a panel 1, a heating element 4, an upper insulating mica sheet 3, a lower insulating mica sheet 5, and a cover 6. The upper insulating mica sheet 3, the heating element 4, and the lower insulating mica sheet 5 are sequentially pressed and connected to the inner wall surface of the panel 1 by the cover 6. The panel 1 includes a body and a heating base. The heating base is located in the middle of the body, forming a recess for connecting the kettle body. The heating base forms the bottom of the kettle body. A protrusion 101 is located in the middle of the heating base. The NTC sensor 2 passes through the heating base, the heating component 4, the upper insulating mica sheet 3, and the lower insulating mica sheet 5 and is fixedly connected to the cover 6. The upper surface of the NTC sensor 2 abuts against the lower surface of the protrusion 101. The pot body is fixed in the recess, and the side wall of the main body is fixedly connected to the bottom of the pot body; The heating element 4, the upper insulating mica sheet 3, and the lower insulating mica sheet 5 are provided with through holes corresponding to the NTC sensor 2; The cover 6 is fixedly connected to the side of the body.
[0021] The heating component 4 is a heating wire disc, which is formed by laying a heating wire 403 horizontally. The starting end and the ending end are adjacent to each other. A connector is provided, which is distributed to connect the starting end, the ending end, and the terminal block outside the cover 6 through the lower insulating mica sheet 5.
[0022] The heating element 4 includes a heating core plate. The upper insulating mica sheet 3 and the lower insulating mica sheet 5 are located above and below the heating core plate, respectively. The heating core plate includes a first mica sheet 401 and a second mica sheet 402. The first mica sheet 401 and the second mica sheet 402 are provided with a plurality of slots 404 around their peripheries. The heating wire 403 is wound from the upper part of the first mica sheet 401, continuously wound in the slots 404, and led out from the upper part of the second mica sheet 402, passing through the lower insulating mica sheet 5 and the cover 6 to connect to the terminal block. The spacing between the plurality of card slots 404 is the same.
[0023] The difference in spacing between several of the card slots 404 is less than 5% to 20% of the spacing.
[0024] The lower insulating mica sheet 5 is provided with a corresponding heating wire 403 with an outlet opening, and the heating wire 403 is led out from the lead wire opening of the cover 6 through the outlet opening.
[0025] The terminal block includes a terminal block 9 and a rivet 8. The heating wire 403 is led out from the lead wire opening of the cover 6 and passes through the terminal block 9. A portion of the rivet 8 is sleeved on the terminal block 9, and the other end is riveted to the cover 6 by a rivet 7.
[0026] The surface of panel 1 is provided with an anodized layer.
[0027] An annular groove is provided between the main body and the heating base. The annular groove is formed integrally with the main body by bending the edge of the heating base. The side of the kettle body is fixed in the annular groove and sealed to the annular groove.
[0028] The outer edge of the heating base protrudes 101 and then extends downward to be integrally formed with the body.
[0029] The protrusion 101 is integrally molded with the heating base, so water inside the kettle will not seep into the heating element through the heating base. There is no need to use a sealing ring to seal the NTC sensor and the kettle, which completely eliminates the problem of water leakage and avoids damage caused by water seeping into the heating element, thus extending the service life. In addition, the heating element is in contact with the heating base, resulting in high thermal efficiency.
[0030] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.
Claims
1. An integrated NTC electric cooking device, characterized by: The kettle body, the power supply and the heating disc assembly, the heating disc assembly comprises a panel, a heating assembly, an upper insulating mica sheet, a lower insulating mica sheet and a cover, the upper insulating mica sheet, the heating assembly and the lower insulating mica sheet are sequentially pressed and connected with the inner wall surface of the panel by the cover, The panel comprises a body and a heating base, the heating base is located in the middle of the body, the body and the heating base form a recess for connecting the kettle body, the heating base forms the bottom of the kettle body, the middle of the heating base is provided with a protrusion, the NTC sensor is fixedly connected through the heating base, the heating assembly, the upper insulating mica sheet, the lower insulating mica sheet and the cover, and the upper surface of the NTC sensor abuts against the lower surface of the protrusion, The kettle body is fixed in the recess, and the side wall of the body is fixedly connected with the bottom of the kettle body; The heating assembly, the upper insulating mica sheet and the lower insulating mica sheet are provided with through holes corresponding to the NTC sensor; The cover is fixedly connected with the side of the body; A controller is arranged and electrically connected with the power supply, the heating disc assembly and the NTC sensor.
2. The integrated NTC electric cooking device according to claim 1, characterized in that: The heating assembly is a heating wire disc formed by horizontally laying a heating wire, the starting end and the ending end are adjacent, and a wiring device is arranged, which is distributedly connected with the starting end, the ending end, penetrates the lower insulating mica sheet and is connected with the terminal outside the cover.
3. The integrated NTC electric cooking device according to claim 1, characterized in that: The heating assembly comprises a heating core plate, the upper insulating mica sheet and the lower insulating mica sheet are located above and below the heating core plate, the heating core plate comprises a first mica sheet and a second mica sheet, a plurality of clamping grooves are arranged around the first mica sheet and the second mica sheet, the heating wire is wound into the first mica sheet from the upper part of the first mica sheet, continuously wound in the clamping grooves, and led out from the upper part of the second mica sheet and connected with the terminal through the lower insulating mica sheet and the cover.
4. The integrated NTC electric cooking device according to claim 3, characterized in that: The plurality of clamping grooves have the same spacing.
5. The integrated NTC electric cooking device according to claim 4, characterized in that: The difference between the spacings of the plurality of clamping grooves is less than 5% to 20% of the spacing.
6. The integrated NTC electric cooking device according to claim 2 or 3, characterized in that: The lower insulating mica sheet is provided with a lead-out opening corresponding to the heating wire, and the heating wire is led out from the lead-out opening of the cover.
7. The integrated NTC electric cooking device according to claim 1, characterized in that: The terminal comprises a terminal end and a riveting piece, the heating wire is led out from the lead-out opening of the cover and penetrates the terminal end, and a part of the riveting piece is sleeved with the terminal end, and the other end is riveted and fixed with the cover by a rivet.
8. The integrated NTC electric cooking device according to claim 1, characterized in that: The surface of the panel is provided with an anodization layer.
9. The integrated NTC electric cooking device according to claim 1, characterized in that: A ring groove is arranged between the body and the heating base, the ring groove is formed by bending the edge of the heating base, and the side surface of the kettle body is fixed in the ring groove and sealingly connected with the ring groove.
10. The integrated NTC electric cooking device according to claim 9, characterized in that: The outer edge of the heating base is protruded and then extended downward and integrally formed with the body.