Heat insulation heating disc and electric heating device

Abstract

A heat insulation heating disc comprises an upper cover, a heating assembly and a sealing cover, the heating assembly comprises a heating core plate, the heating core plate is located between the upper cover and the sealing cover, a clamping groove is formed in the periphery of the heating core plate, a heating wire is arranged in the clamping groove in a surrounding mode, the upper cover is fixedly connected with the sealing cover, a heat insulation plate is arranged below the sealing cover, and the heat insulation plate is fixedly connected with the heating core plate. And a gap is formed between the thermal insulation plate and the sealing cover. The double-sided heating wire electric heating plate effectively solves the problem that the temperature below the plate bottom of an existing double-sided heating wire electric heating plate is too high, heat at the plate bottom of the heating plate can be prevented from being further diffused downwards, a circuit or other plastic structures, connected with the heating plate, of an electric heating device such as an electric cooker can be prevented from being burnt, and the service life of the electric heating device is prolonged.

Description

Technical Field

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

[0002] Heating with an electric heating wire 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. However, because the heat generated during electric heating is mainly concentrated around the heating wire, it may not meet the requirements in some applications where uniform heating is necessary.

[0003] Existing electric heating wire devices require the heating wire to be energized and heated. The top cover and the sealing cover must firmly clamp and fix the heating core plate. Mica insulating sheets must be placed between the heating core plate and the top cover, and between the heating core plate and the top cover and the sealing cover.

[0004] Current heating plates feature double-sided heating, which offers high thermal efficiency but has led to new problems. Heat from the heating wires at the bottom of the heating core plate diffuses along the bottom of the heating plate under the cover, causing the bottom temperature of the heating plate to become too high. The electrical control components and plastic components around the heating plate will experience reduced lifespan and may even burn out in severe cases due to prolonged exposure to high temperatures.

[0005] Therefore, there is an urgent need to provide a heating plate that can solve the problem of high bottom temperature of the heating plate. Summary of the Invention

[0006] The purpose of this invention is to provide a heat-insulated heating plate with good bottom insulation and controllable bottom temperature, so as to solve the problems mentioned in the background art.

[0007] This utility model also provides an electric heating device with a long service life.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A heat-insulating heating plate includes an upper cover, a heating component, and a sealing cover. The heating component includes a heating core plate located between the upper cover and the sealing cover. A slot is provided around the periphery of the heating core plate, and a heating wire is wound around the slot. The upper cover is fixedly connected to the sealing cover. A heat insulation plate is provided below the sealing cover, and a gap is provided between the heat insulation plate and the sealing cover.

[0010] The insulation plate can prevent heat from diffusing down the cover towards the heating plate.

[0011] The gap is provided with a heat insulation layer, which is a mica sheet and / or a heat insulation fiber cotton layer.

[0012] A filling insulation layer is provided between the heat insulation layer and the cover, and the filling insulation layer is formed by filling with mica waste.

[0013] The insulation layer has an opening in the middle, which fits into the central through hole of the cover.

[0014] The heat insulation layer is filled between the heat insulation layer and the central through hole of the cover.

[0015] The insulation plate is welded to the pipe feet of the cover or the insulation plate is welded to the support of the cover.

[0016] The insulation plate is connected and fixed to the cover bolts.

[0017] The inner surface of the insulation board is mirrored.

[0018] The thickness of the mica sheet is 0.15 to 0.4 mm.

[0019] The insulation plate has an opening, which includes a central opening, a pin opening, a terminal opening, and a bracket opening. The central opening, pin opening, terminal opening, and bracket opening are respectively offset from the central through hole, pin, terminal, and bracket of the cover.

[0020] Another objective of this invention is to provide an electric heating device, including the heat-insulating heating plate and the container.

[0021] Beneficial effects:

[0022] The technical solution of this application effectively solves the problem of excessively high temperature at the bottom of the existing double-sided heating wire electric heating plate. It can prevent the heat at the bottom of the heating plate from spreading further downwards and burning out the circuit or other plastic structures connected to the heating plate of electric heating devices such as rice cookers, thereby improving the service life of the electric heating device. Attached Figure Description

[0023] 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.

[0024] Figure 1 This is a cross-sectional view of the present invention;

[0025] Figure 2 This is an exploded view of the present invention;

[0026] Figure 3 This is a rear view of the present invention;

[0027] Figure 4 This is a schematic diagram of the insulation board of this utility model.

[0028] 1 - Top cover

[0029] 2—Heating core plate, 201—Slot, 202—Heating wire

[0030] 3 – Cover, 4 – Fill with insulation layer, 5 – Insulation layer

[0031] 6 – Insulation board; 601 – Center opening; 602 – Pin opening; 603 – Terminal opening; 604 – Bracket opening.

[0032] 7 – Center through hole, 8 – Pin, 9 – Terminal, 10 – Bracket. Detailed Implementation

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] A heat-insulating heating plate includes an upper cover 1, a heating component, and a sealing cover 3. The heating component includes a heating core plate 2, which is located between the upper cover 1 and the sealing cover 3. A groove 201 is provided around the periphery of the heating core plate 2, and a heating wire 202 is wrapped around the groove 201. The upper cover 1 and the sealing cover 3 are fixedly connected. A heat insulation plate 6 is provided below the sealing cover 3, and a gap is provided between the heat insulation plate 6 and the sealing cover 3.

[0038] The cover 3 is the lower cover of the heating plate. The thickness of the cover 3 and the upper cover 1 is about 0.4 to 2 mm. The cover 3 and the upper cover 1 are generally made of aluminum and aluminum alloy. The cover 3 abuts and fixes the heating core plate 2 and the mica insulating sheet to the upper cover 1 to form a stable structure. The heating core plate 2 and the mica insulating sheet do not move between the upper cover 1 and the cover 3.

[0039] The heat emitted by the heating wire 202 located below the heating core plate 2 is conducted through the lower cover to diffuse to the area below the heating plate. The heat insulation plate increases the thickness of the lower plate and can isolate heat through the gaps, so that the temperature below the heating plate is under control. The air in the gaps is a good heat insulation layer that can further reduce the diffusion of heat due to contact conduction.

[0040] A heat insulation layer 5 can also be further provided in the gap, wherein the heat insulation layer 5 is a mica sheet and / or a heat insulation fiber cotton layer.

[0041] The mica sheet and the heat-insulating fiber cotton layer can isolate the heat conduction of the cover 3 and prevent the heat from spreading further.

[0042] Setting the mica sheet thickness to 0.15–0.4 mm can achieve temperature control without increasing costs excessively.

[0043] A filling insulation layer 4 is provided between the heat insulation layer 5 and the cover 3, and the filling insulation layer 4 is formed by filling with mica waste.

[0044] The insulation layer 4 can be filled with heat-insulating materials or mica fertilizer, which can further utilize the mica residue generated during the processing, thereby achieving an environmentally friendly effect.

[0045] The heat insulation layer 5 has a hole in the middle, and the heat insulation layer 5 is sleeved on the central through hole 7 of the cover 3. The central through hole 7 is used to install temperature and pressure sensors, namely temperature sensors and pressure sensors commonly used in rice cookers. The heat insulation layer 5 fits the structure of the cover 3 through the opening, resulting in a tight fit, good heat insulation effect, and high efficiency.

[0046] Generally, the central through hole 7 of the cover 3 extends downwards. In this application, the heat insulation layer 5 is fitted onto the central through hole 7 of the cover 3, which refers to the body structure fitted onto the downward extending part of the cover 3.

[0047] The filling insulation layer 4 is filled between the insulation layer 5 and the central through hole 7 of the cover 3.

[0048] The insulation plate 6 is welded and fixed to the pin 8 of the cover 3, or the insulation plate 6 is welded and fixed to the bracket 10 of the cover 3.

[0049] The insulation plate 6 can be fixed in a convenient way, such as by welding it to the pin 8, the bracket 10, or the cover 3. When the insulation plate 6 is welded to the cover 3, there should be fewer than 5 contact points to avoid an increase in heat conduction effect due to too many contact points.

[0050] Preferably, it is welded to pin 8 or bracket 10.

[0051] Pin 8 is a mounting foot for fixing the heating plate to the electric heating element, and bracket 10 is a mounting bracket for installing temperature and pressure sensors.

[0052] The insulation plate 6 is bolted to the cover 3. Alternatively, the insulation plate 6 and the cover 3 can be fixed without welding by bolting.

[0053] The inner surface of the insulation plate 6 is mirrored. Alternatively, the inner surface of the insulation plate 6 can be made mirrored, which can reflect the heat conducted out by the cover 3, allowing the heat to accumulate further upward and preventing it from spreading further downward, thus improving the heat insulation effect.

[0054] The insulation plate 6 has a central opening 601, a tube foot opening 602, a terminal opening 603, and a bracket opening 604. The central opening 601, tube foot opening 602, terminal opening 603, and bracket opening 604 are respectively offset from the central through hole 7, tube foot 8, terminal 9, and bracket 10 of the cover 3.

[0055] By setting an opening to offset the structure of the original cover 3, it can be easily installed and fixed, and is simple to produce and easy to implement.

[0056] The isolation in this application refers to improving the heat insulation effect, preventing the heating plate from spreading more heat downwards, and reducing the temperature below the heating plate.

[0057] In this article, terminal 9 refers to the terminal used to connect the heating wire.

[0058] An electric heating device includes the heat-insulating heating plate and the container.

[0059] 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 heat-insulating heating plate, comprising a top cover, a heating assembly, and a sealing cover, wherein the heating assembly includes a heating core plate located between the top cover and the sealing cover, and a slot is provided around the periphery of the heating core plate, and a heating wire is wound around the slot, characterized in that: The upper cover is fixedly connected to the sealing cover, and a heat insulation plate is provided below the sealing cover, with a gap between the heat insulation plate and the sealing cover.

2. The heat-insulating heating plate according to claim 1, characterized in that: A heat insulation layer is provided in the gap, which is a mica sheet and / or a heat insulation fiber cotton layer.

3. The heat-insulating heating plate according to claim 2, characterized in that: A filling insulation layer is provided between the heat insulation layer and the cover, and the filling insulation layer is formed by filling with mica waste.

4. A heat disc according to claim 2, wherein: The insulation layer has a hole in the middle, and the insulation layer is fitted onto the central through hole of the cover.

5. A heat disc according to claim 3, wherein: The filling insulation layer is filled between the insulation layer and the central through hole of the cover.

6. The heat disc of claim 1, wherein: The insulation plate is welded and fixed to the pipe feet of the cover, or the insulation plate is welded and fixed to the bracket of the cover.

7. A heat-insulating heating plate according to claim 1, characterized in that: The insulation board is connected and fixed to the cover bolts.

8. The heat disc of claim 1, wherein: The inner surface of the insulation board is mirrored.

9. The heat disc of claim 1, wherein: The insulation plate has a central opening, a pin opening, a terminal opening, and a bracket opening. The central opening, pin opening, terminal opening, and bracket opening are respectively offset from the central through hole, pin, terminal, and bracket of the cover.

10. An electric heating device, characterized in that: Includes the heat-insulating heating plate and container as described in any one of claims 1 to 9.

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