Heating assembly of electric hot tray

Abstract

The utility model provides a heating assembly of an electric hot tray. The heating assembly comprises a heating body substrate, a heating coating and a heat insulation block which are arranged in sequence. The heating coating is locally coated and sintered on one side of the heating body substrate; the heating body substrate is coated with a protection circuit which surrounds the heating coating for one circle and is used for preventing the heating coating from electric leakage, the starting point end and the ending point end of the protection circuit are not connected, the starting point end and the ending point end of the protection circuit are mutually staggered in the extension direction of the protection circuit, and the protection circuit surrounds the heating coating in a 360-degree all-dimensional mode. According to the scheme, the position, the area and the power of the heating coating can be determined according to the requirements of product design; according to the design of the protection circuit, when any position, close to the edge, of the heating body substrate cracks, the protection circuit can be disconnected, the control circuit of the baking tray can immediately detect a disconnection signal, then the heating coating is controlled to be powered off, the situation of electric leakage is prevented, and the safety of a user is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of electric heating products, in particular to a heating component of an electric heating plate. Background Art

[0002] Due to the high temperature baking, the moisture on the surface of the ingredients evaporates quickly, forming a layer of crispy skin. This crispy skin not only makes the ingredients crispy on the outside and tender on the inside, but also locks in the moisture inside, maintaining the freshness and taste of the meat. Therefore, barbecued food is widely popular among people.

[0003] Existing electric heating baking trays usually bake food by heating with electric heating tubes. Usually, the electric heating tubes generate heat through electric heating wires. This method has large energy loss and low efficiency. In addition, the contact between the electric heating tubes and the heating tray is not direct, which further causes the loss of heat energy and easily causes the temperature of the heating tray to be uneven, resulting in insufficient baking of the food, thereby reducing the baking effect of the food.

[0004] In order to solve the above problems, people have designed many solutions. A patent document with the authorization announcement number CN219960863U discloses a graphene electric heating baking tray, which includes a main shell, a connecting frame is provided on the upper side of the main shell, and is fixedly connected by bolts. The connecting frame is clamped and fixed on the lower side of the microcrystalline glass heating plate. The bottom surface of the microcrystalline glass heating plate is coated with a graphene heating coating, and the graphene heating coating is arranged inside the limit frame. The bottom surface of the graphene heating coating is connected to a charging line, and the charging line passes through a movable block, and the movable block is rotatably connected to the main shell. This solution uses the structure of microcrystalline glass and graphene to achieve the use of far-infrared rays to bake food. It has low energy consumption, good energy-saving and environmental protection effects, and fast heating response speed, which improves the efficiency of heating and baking. In addition, the charging line can be conveniently placed inside through the movable block and the limit card, so as to achieve the purpose of convenient arrangement.

[0005] A patent document with authorization announcement number CN219661480U discloses an infrared heating baking tray, comprising a baking tray body, a storage slot recessed at the top of the baking tray body, a heating plate arranged at the bottom of the storage slot, a heating device arranged below the heating plate, and a control panel arranged on one side of the storage slot, wherein the heating plate is made of microcrystalline glass, and the heating device is a rare earth thick film circuit electric heating element that can generate far infrared rays; the utility model heats food by means of a rare earth thick film circuit electric heating element that can perform infrared radiation heating, and the far infrared rays generated by the rare earth thick film circuit electric heating element can pass through the heating plate supported by microcrystalline glass and heat the food, and the far infrared rays can improve the heating efficiency and enable the heat to quickly penetrate the food. This solution not only has high heating efficiency and low energy consumption, but also has low smoke and good food taste, and can be better applied to daily life.

[0006] Both of the above designs combine heating elements with microcrystalline glass to reduce energy consumption and improve heating efficiency. However, neither of the above two solutions discloses insulation and heat insulation structures. Most importantly, since the carrier of the heating element is fragile items such as microcrystalline glass or ceramics, when an unexpected situation occurs and causes the microcrystalline glass plate to break, the above two solutions do not have any response measures. If the circuit that supplies power to the heating element cannot be cut off in time when the microcrystalline glass breaks, the user may be electrocuted, resulting in serious accidents.

[0007] Therefore, it is necessary to design a safe heating component to solve the above problems. Summary of the invention

[0008] In order to solve the problems existing in the prior art, the utility model provides a heating component of an electric heating plate, which isolates heat by arranging a heat insulating block; a protection circuit is arranged around the heating coating, and when the microcrystalline glass breaks, the protection circuit is disconnected, thereby cutting off the power to the heating element to ensure the safety of the user.

[0009] To achieve the above-mentioned purpose, the technical solution of the utility model is: a heating component of an electric hot plate, comprising a heating body substrate for carrying food, a heating coating for heating and an insulating block for heat insulation which are arranged in sequence; the heating coating is locally coated and sintered on one side of the heating body substrate; a protection circuit is coated on the heating body substrate and surrounds the heating coating to prevent the heating coating from leaking electricity, the starting end and the end end of the protection circuit are not connected, and the starting end and the end end of the protection circuit are staggered with each other in the extension direction of the protection circuit, so that the protection circuit surrounds the heating coating 360° in all directions.

[0010] In the above scheme, the heating coating is locally coated and sintered on the heating element substrate, and the position, area and power of the heating coating can be determined according to the needs of product design; in the design of the above protection circuit, when the heating element substrate breaks or cracks appear at any position near the edge, the protection circuit can be disconnected, so the control circuit of the baking tray can immediately detect the disconnection signal, and then control the heating coating to cut off the power, prevent leakage, and ensure the safety of the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0012] Figure 2 It is a structural schematic diagram of another perspective of an embodiment of the utility model;

[0013] Figure 3 It is an exploded schematic diagram of an embodiment of the utility model;

[0014] Figure 4 It is a schematic diagram of a heating element substrate in an embodiment of the utility model;

[0015] Figure 5 It is a schematic diagram of another embodiment of the protection circuit on the heating element substrate in the embodiment of the utility model. DETAILED DESCRIPTION

[0016] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0017] like Figures 1 to 5 As shown, a heating component of an electric hot plate includes a heating body substrate 1 for carrying food.

[0018] Usually, the heating element substrate 1 is made of a glass-ceramic plate or a ceramic plate. Both materials are high temperature resistant and insulating, and are good materials for heating element substrates.

[0019] To improve the anti-stick performance, an anti-stick coating can be applied to the side of the microcrystalline glass plate or ceramic plate that supports food. The other side of the microcrystalline glass plate or ceramic plate does not need to be coated with an anti-stick coating because it needs to be coated with a heating coating.

[0020] Typically, the anti-stick coating is a water-based ceramic layer or a polytetrafluoroethylene layer.

[0021] In this embodiment, the heating element substrate 1 is a microcrystalline glass plate, and a water-based ceramic layer is coated on one side of the microcrystalline glass plate.

[0022] Of course, the heating element substrate 1 is not limited to a glass-ceramic plate or a ceramic plate, and may also be composed of a metal substrate and an insulating layer coated on the metal substrate.

[0023] The heating coating 2 is partially coated and sintered on the heating element substrate 1, and the heating coating 2 is used to generate heat after power is turned on. The heating coating 2 can be partially and fully covered on the heating element substrate 1, or can be formed by a linear array of multiple rectangular heating coating monomers 21. The heating coating formed by a linear array of multiple rectangular heating coating monomers 21 has the characteristics of small actual heating area and small coating usage, which makes the current of the heating coating pass evenly and more energy-saving.

[0024] Generally, from the perspective of practicality and product positioning, the distance from the first heating coating monomer 21 to the last heating coating monomer 21 is L1, 110mm≤L1≤310mm; the distance between the two electrodes 22 is W1, 150mm≤W1≤210mm; the interval between two adjacent heating coating monomers 21 is W2, 1mm≤W2≤5mm; the length of the electrical connection end extending beyond the heating coating 2 is L2, 15mm≤L2≤45mm.

[0025] When the electric heating plate is designed to be suitable for one or two persons, the distance W1 between the two electrodes 22 is designed to be 190 mm; the distance L1 between the first heating coating monomer 21 and the last heating coating monomer 21 is designed to be 170 mm.

[0026] When the electric heating plate is designed to be used by more than three people, the distance W1 between the two electrodes 22 is designed to be 190 mm; the distance L1 between the first heating coating monomer 21 and the last heating coating monomer 21 is designed to be 290 mm.

[0027] The above sizes are suitable for grilling steaks, chicken wings and other foods.

[0028] like Figure 3 and Figure 4 As shown, in this embodiment, electrodes 22 are coated on both ends of the rectangular heating coating monomer 21 in the length direction, and the electrodes 22 connect all the heating coating monomers 21 so that all the heating coating monomers 21 form a parallel structure.

[0029] One end of the electrode 22 extends a certain distance away from the heating coating 2 to form an electrical connection end 23. The electrode connection end 23 is used to connect to the power supply circuit to energize the heating coating 2. Usually, an elastic electrode column or electrode sheet is provided on the electric heating plate. When installing the heating component, it is only necessary to align the electrode connection end 23 with the electrode column or electrode sheet and apply pressure to make it tightly connected.

[0030] To improve the conductivity, the electrode 22 is formed by coating and sintering a conductive paste such as silver paste, copper paste or aluminum paste. In this embodiment, the electrode 22 is formed by coating and sintering a silver paste having the lowest resistance.

[0031] In this embodiment, the heating coating 2 is a graphene heating coating. Of course, the heating coating 2 is not limited to the graphene heating coating, and can also be an electric heating film or other coating that can meet the use requirements.

[0032] For insulation, an insulating layer is usually coated on the surface of the heating coating 2 .

[0033] like Figures 2 to 4 As shown, the heating element substrate 1 is coated with a protection circuit 24 surrounding the heating coating 2 to prevent leakage of the heating coating. The starting end and the end end of the protection circuit 24 are not connected, and the starting end and the end end of the protection circuit 24 are respectively connected to the control circuit of the electric heating plate.

[0034] The starting point and the end point of the protection circuit 24 are interlaced in the extension direction of the protection circuit 24, so that the protection circuit surrounds the heating coating 2 in all directions at 360 degrees. Since the size of the microcrystalline glass used in the baking tray is not very large, when the microcrystalline glass cracks due to unexpected reasons, it often extends to the edge of the microcrystalline glass. The above protection circuit surrounds the heating coating 2 and is located near the edge of the microcrystalline glass. Therefore, when the microcrystalline glass cracks, the protection circuit will be disconnected, and the control circuit of the electric heating plate can immediately detect the disconnection signal, and then control the heating coating 2 to cut off the power to prevent leakage and ensure the safety of the user.

[0035] In this embodiment, the protection circuit 24 is formed by coating and sintering a conductive paste such as silver paste, copper paste or aluminum paste. In this embodiment, the protection circuit 24 is formed by coating and sintering a silver paste having the smallest resistance.

[0036] Figure 4 FIG. 2 shows a setting position and direction of the protection circuit 24. Of course, the protection circuit 24 has more than one setting style. Figure 5 The core of the style shown in the figure is to surround the heating coating 360° in all directions without dead angles to ensure that the microcrystalline glass can disconnect the protection circuit 24 when the crack extends to the edge.

[0037] like Figure 3 As shown, in order to further improve the insulation performance, the heating component also includes a mica sheet 3 for insulation arranged on the side of the heating coating 2, and the area of ​​the mica sheet 3 is larger than the area of ​​the heating coating 2 to fully cover the heating coating 2.

[0038] like Figure 2 and Figure 3 As shown, an insulation block 4 for heat insulation is also provided on the outer side of the mica sheet 3. The insulation block 4 can be an aerogel insulation block, an asbestos insulation block or a quartz refractory insulation block.

[0039] In this embodiment, the thermal insulation block 4 is an aerogel thermal insulation block.

[0040] Sensor mounting holes 40 are provided on the mica sheet 3 and the insulation block 4, so that the sensor for measuring temperature can pass through the mica sheet 3 and the insulation block 4 and contact the microcrystalline glass or the heating coating 2 or the insulating layer coated on the heating coating 2 to accurately measure the temperature of the microcrystalline glass.

[0041] An oil leakage hole 25 is provided at one end of the heating element substrate 1 away from the electrical connection end; and circular chamfers are provided at both ends of the oil leakage hole 25 .

[0042] The solution of the utility model has a low heating power of the heating coating, and the heating method has direct heat generation, high electric heat conversion efficiency, and fast temperature rise. It is suitable for use in small portable baking trays, can be powered by household AC power, and can also be powered by a portable mobile power supply or a car power supply. It is particularly suitable for being made into a small baking tray for outdoor use.

Claims

1. A heating component of a heating plate, characterized in that: It includes a heating body substrate for carrying food, a heating coating for heating, and a heat-insulating block for heat insulation, which are arranged in sequence; The heating coating is locally coated and sintered on one side of the heating element substrate; A protection circuit is coated on the heating element substrate and surrounds the heating coating to prevent the heating coating from leaking electricity. The starting end and the ending end of the protection circuit are not connected. The starting end and the ending end of the protection circuit are staggered in the extension direction of the protection circuit, so that the protection circuit surrounds the heating coating 360° in all directions.

2. The heating component of the electric heating plate according to claim 1, characterized in that: A mica sheet for insulation is provided between the heating coating and the heat-insulating block, and the area of ​​the mica sheet is larger than that of the heating coating; sensor mounting holes are provided on the mica sheet and the heat-insulating block.

3. The heating component of the electric heating plate according to claim 1, characterized in that: The heating element substrate is a glass-ceramic plate or a ceramic plate, and a non-stick coating is coated on the side of the glass-ceramic plate or the ceramic plate that supports food.

4. The heating component of the electric heating plate according to claim 1, characterized in that: The heating element substrate is composed of a metal substrate and an insulating layer coated on the metal substrate.

5. The heating component of the electric heating plate according to claim 1, characterized in that: The heating coating is formed by a linear array of multiple rectangular heating coating monomers; Electrodes are coated on both ends of the rectangular heating coating monomer in the length direction, and the electrodes connect all the heating coating monomers; One end of the electrode extends a certain distance away from the heating coating to form an electrical connection end.

6. The heating component of the electric heating plate according to claim 5, characterized in that: The electrode is formed by coating and sintering silver paste, copper paste or aluminum paste.

7. The heating component of the electric heating plate according to claim 5, characterized in that: The distance from the first heating coating monomer to the last heating coating monomer is L1, 110mm≤L1≤310mm; the distance between the two electrodes is W1, 150mm≤W1≤210mm; the interval between two adjacent heating coating monomers is W2, 1mm≤W2≤5mm; the length of the electrical connection end extending beyond the heating coating is L2, 15mm≤L2≤45mm.

8. The heating component of the electric heating plate according to claim 1, characterized in that: The protection circuit is formed by coating and sintering silver paste, copper paste or aluminum paste.

9. The heating component of the electric heating plate according to claim 3, characterized in that: The anti-stick coating is a water-based ceramic layer or a polytetrafluoroethylene layer.

10. The heating component of the electric heating plate according to claim 5, characterized in that: An oil leakage hole is arranged at one end of the heating element substrate away from the electrical connection end; and circular chamfers are arranged at both ends of the oil leakage hole.

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