Radiation heating plate and heating appliance thereof

Abstract

The utility model discloses a radiation heating plate and a heating appliance thereof, the radiation heating plate comprises a heating wire, a mica winding plate and a mica substrate, the heating wire is wound on the mica winding plate, all sections of the heating wire located on the same surface of the mica winding plate are mutually separated, the mica substrate is connected to one side of the mica winding plate, and the mica substrate is connected to the other side of the mica winding plate. And the heating wire is also connected with the electrode. The radiation heating plate is mainly composed of the mica sheet and the heating wire, the cost is low, the weight is light, the thickness is small, the heating wire is directly wound on the mica winding plate (mica plate), and the process is simple; moreover, the heating wires on the two sides of the mica wire winding plate are separated by the mica wire winding plate, the heating wires on the same surface of the mica wire winding plate are separated from one another, the problems that energy is concentrated and fusing is prone to occurring due to the fact that the heating wires get close to one another are solved, most heat radiated downwards is blocked by the mica substrate, and loss is reduced.

Description

Technical Field

[0001] The utility model relates to an electric heating device, in particular to a radiation heating plate and its heating appliance. Background Art

[0002] At present, heating devices such as electric kettles and electric water cups mainly use methods such as cast-aluminum heating plates and electromagnetic heating to heat containers. Among them, the cast-aluminum heating plate mainly includes a heating tube and an aluminum casting. The aluminum casting is wrapped outside the heating tube. The heating tube includes an electric heating wire and a metal outer tube. The metal outer tube is sleeved outside the electric heating wire, and insulating and heat-conducting materials such as magnesium oxide powder are filled between the metal outer tube and the electric heating wire. Thus, after the electric heating wire generates heat, it is transferred to the aluminum casting only after passing through the insulating and heat-conducting material and the metal outer tube, resulting in serious heat loss and high cost. At the same time, since this heating plate belongs to contact heating and needs to be in good contact with the bottom of the utensil, however, in the production of glass utensils and ceramic utensils, their forming processes are difficult to maintain consistency. Therefore, it cannot be ensured that the bottom shape has a reliable fit with the heating plate, and the heating efficiency is low. Electromagnetic heating mainly consists of an electromagnetic heating control circuit, a copper coil, a cooling fan, etc. Moreover, glass or ceramic utensils cannot be directly heated and need to be provided with a magnetic induction heating coating at the bottom of the utensil, which has a higher cost and more difficult processing technology.

[0003] In addition, the above heating methods are relatively large in volume and not light enough, which is not conducive to being used in portable heating devices.

[0004] Chinese Patent Publication No. CN116801434A discloses a heating plate on September 22, 2023, which includes a winding assembly and a bottom plate. The winding assembly includes a first winding frame, a second winding frame and a heating wire. The first winding frame and the second winding frame are arranged on the bottom plate, and there is a gap between the first winding frame and the second winding frame. The heating wire is wound around the first winding frame and the second winding frame. In this structure, the upper heating wire and the lower heating wire between the first winding frame and the second winding frame are relatively close to each other and are not physically separated, resulting in too high a temperature rise of the adjacent upper and lower heating wires and being easily burned out. Therefore, the use range of the heating plate is limited. This heating plate is mainly used in toasters, that is, the winding density of the heating wire is relatively low and the power cannot be too large. Therefore, this design of the heating plate is not suitable for heating utensils. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a radiation heating plate with a simple and reasonable structure, low cost, light weight, thin thickness and high heating power.

[0006] The purpose of the utility model is achieved as follows:

[0007] A radiation heating plate includes a heating wire, a mica winding board and a mica substrate. The heating wire is wound around the mica winding board, and the sections of the heating wire located on the same surface of the mica winding board are spaced apart from each other. The mica substrate is connected to one side of the mica winding board, and the heating wire is also connected to an electrode.

[0008] The object of the present utility model can also be solved by the following technical measures:

[0009] As a more specific solution, there are two or more mica winding boards. Heating wires are respectively wound around each mica winding board. Each mica winding board is laid flat, and the heating wires of adjacent mica winding boards are spaced apart from each other.

[0010] As a further solution, the heating wires on each mica winding board are connected in series in sequence, and there are two or more electrodes; when there are two electrodes, the two electrodes are respectively connected to the two ends of the series-connected heating wires; when there are three or more electrodes, two of the electrodes are respectively connected to the two ends of the series-connected heating wires, and the remaining electrodes are connected between the two ends of the series-connected heating wires. When there are three or more electrodes, by controlling the circuit through a shift switch or other forms to select any two electrodes to conduct electricity, different heating gear adjustments can be realized.

[0011] As another further solution, the heating wires on each mica winding board are connected in parallel, or the heating wires on each mica winding board are respectively provided with independent electrodes, that is, the heating wires on each mica winding board can be independently controlled.

[0012] As a further solution, a plurality of tooth grooves are provided on the edge of the mica winding board, and the heating wire winds through the tooth grooves to prevent the heating wire from shifting or loosening, and moreover, the positioning between the sections of the heating wire is more accurate.

[0013] As a further solution, the electrode is arranged on the side of the mica substrate facing away from the mica winding board to reduce the influence of radiant heat on the electrode.

[0014] As a further solution, the mica winding board and the mica substrate are fixedly connected by rivets.

[0015] The object of the present utility model is to provide a heating appliance with a simple and reasonable structure, low cost and light weight.

[0016] The object of the present utility model is achieved as follows:

[0017] A heating appliance includes a base. The above-mentioned radiation heating plate is further provided on the base. The mica substrate of the radiation heating plate faces downward, a radiation heating area is formed above the radiation heating plate, and a utensil placing part is further provided on the base.

[0018] The object of the present utility model can also be solved by the following technical measures:

[0019] As a more specific solution, a metal radiation disc is further provided at the bottom of the radiation heating plate, and the electrode is insulated from the metal radiation disc; and / or, a microcrystalline plate is covered above the radiation heating plate, and the microcrystalline plate is fixedly connected to the base.

[0020] As a further solution, it further includes a glass container or a ceramic container, and the glass container or the ceramic container is arranged on the vessel placing part and is fixedly connected or separately connected to the base; or, it further includes a fully metal container or a container with a metal bottom, and the bottom of the container is insulated from the top surface of the radiation heating plate. The container with a metal bottom can be a folding kettle body, that is, the kettle body is a folding silica gel structure and the kettle bottom is a stainless steel structure.

[0021] As a further solution, the bottom of the glass container is coated with an endothermic light-shielding coating. The radiation heating plate is encapsulated at the bottom of the glass container through the base. In order to improve the aesthetics, by coating an endothermic light-shielding coating on the bottom of the glass cavity, on the one hand, it avoids the visualization of the radiation heating plate, and on the other hand, it improves the heating efficiency.

[0022] The beneficial effects of the present utility model are as follows:

[0023] (1) This radiation heating plate is mainly composed of mica sheet material and heating wire, with low cost, light weight, thin thickness. The heating wire is directly wound on the mica winding board (mica board), and the process is simple; moreover, the mica winding board separates the heating wires on both sides thereof, and the heating wire segments on the same surface of the mica winding board are separated from each other, avoiding the problem that the heating wire segments are close to each other and the energy is concentrated, and it is easy to fuse. The mica substrate blocks most of the heat radiated downward and reduces losses.

[0024] (2) When this radiation heating plate is applied to a heating appliance, a radiation heating area is formed above the heating device corresponding to the radiation heating plate, and any heat-resistant vessel can be radiatively heated, especially suitable for heating glass vessels and ceramic vessels.

[0025] (3) This heating appliance is light in weight and small in volume, and can be well applied to products such as portable heating water cups and portable folding kettles. Description of the Drawings

[0026] Figure 1 It is a schematic cross-sectional structure view of the first embodiment of the heating appliance in the present utility model.

[0027] Figure 2 For Figure 1 The enlarged structure view at A in

[0028] Figure 3 It is a schematic three-dimensional structure view of the radiation heating plate in the present utility model.

[0029] Figure 4 This is a top - view structural schematic diagram of the radiation heating plate in the present utility model.

[0030] Figure 5 This is a three - dimensional structural schematic diagram of the radiation heating plate in the present utility model from another angle.

[0031] Figure 6 This is an exploded structural schematic diagram of the heating appliance in the present utility model.

[0032] Figure 7 It is Figure 6 a structural schematic diagram from another angle.

[0033] Figure 8 This is a top - view structural schematic diagram of another embodiment of the radiation heating plate in the present utility model.

[0034] Figure 9 It is Figure 8 an enlarged structural schematic diagram at position B in

[0035] Figure 10 This is a partial cross - sectional structural schematic diagram of the second embodiment of the heating appliance in the present utility model.

[0036] Figure 11 This is a partial cross - sectional structural schematic diagram of the third embodiment of the heating appliance in the present utility model.

[0037] Figure 12 This is a cross - sectional structural schematic diagram of the fourth embodiment of the heating appliance in the present utility model. Specific embodiments

[0038] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0039] Refer to Figures 2 to 5 As shown, a radiation heating plate 1 includes a heating wire 11, and also includes a mica wire - winding plate 13 and a mica substrate 14. The heating wire 11 is wound around the mica wire - winding plate 13, and the segments of the heating wire 11 located on the same surface of the mica wire - winding plate 13 are separated from each other. The mica substrate 14 is connected to one side of the mica wire - winding plate 13, and the heating wire 11 is also connected to the electrode 12.

[0040] There are two mica wire - winding plates 13. The heating wire 11 is wound around each of the two mica wire - winding plates 13 respectively. The two mica wire - winding plates 13 are arranged flatly, and the heating wires 11 of the two mica wire - winding plates 13 are separated from each other. Specifically, a groove 132 is provided on one adjacent side of the two mica wire - winding plates 13, thereby increasing the interval between the heating wires 11 of the two mica wire - winding plates 13.

[0041] The heating wires 11 on each mica winding board 13 are connected in series in sequence. There are two electrodes 12, and the two electrodes 12 are respectively connected to both ends of the series-connected heating wires 11.

[0042] The electrode 12 is arranged on one side of the mica substrate 14 facing away from the mica winding board 13.

[0043] The mica winding board 13 and the mica substrate 14 are fixedly connected by rivets 15.

[0044] See Figure 8 and Figure 9 As shown, a plurality of tooth grooves 131 are provided on the edge of the mica winding board 13, and the heating wire 11 winds through the tooth grooves 131.

[0045] For the first embodiment of the heating appliance, see Figures 1 to 9 As shown, a heating appliance (in this embodiment, the heating appliance is a portable water cup) includes a base 3. The base 3 is further provided with the radiation heating plate 1. The mica substrate 14 of the radiation heating plate 1 faces downward, a radiation heating area is formed above the radiation heating plate 1, and the base 3 is further provided with a vessel placing portion. The heating appliance further includes a control circuit (not shown in the figure), and the control circuit is electrically connected to the electrode 12 of the radiation heating plate 1.

[0046] A plurality of convex ribs 31 are annularly distributed on the inner wall of the base 3, and the radiation heating plate 1 is placed on the upper ends of the convex ribs.

[0047] The upper end edge of the base 3 forms the vessel placing portion. The heating appliance further includes a glass container 2. The outer periphery of the glass container 2 is provided with a lower step surface, and the lower step surface is placed on the vessel placing portion. The bottom of the glass container 2 is close to the radiation heating plate 1.

[0048] The glass container 2 is in a cup shape, and a cup cover 21 is further provided at its top.

[0049] For the second embodiment of the heating appliance, the difference from the first embodiment is: see Figure 10 As shown, a metal radiation disc 4 is further provided at the bottom of the radiation heating plate 1, and the electrode 12 is insulated from the metal radiation disc 4.

[0050] For the third embodiment of the heating appliance, the difference from the first embodiment is: see Figure 11 As shown, a glass-ceramic plate 5 is covered above the radiation heating plate 1, and the glass-ceramic plate 5 is fixedly connected to the base 3. Specifically: a convex platform 32 is provided inside the base 3, and the glass-ceramic plate 5 is placed on the convex platform 32.

[0051] For the fourth embodiment of the heating appliance, the difference from the first embodiment is: see Figure 12As shown, the bottom of the glass container 2 is coated with an endothermic light-shielding coating 6, and the radiant heating plate 1 is encapsulated at the bottom of the glass container 2 through the base 3. An electrical coupler 7 is provided at the bottom of the base 3, and the electrical coupler is electrically connected to the electrode.

Claims

1. A radiant heating plate, comprising a heating wire (11), characterized in that: It also includes a mica winding plate (13) and a mica substrate (14), the heating wire (11) is wound on the mica winding plate (13), and the sections of the heating wire (11) located on the same surface of the mica winding plate (13) are separated from each other, the mica substrate (14) is connected to one side of the mica winding plate (13), and the heating wire (11) is also connected to the electrode (12).

2. The radiant heating panel according to claim 1, characterized in that: There are more than two mica winding plates (13), each of which is wound with a heating wire (11). Each mica winding plate (13) is arranged flat, and the heating wires (11) of two adjacent mica winding plates (13) are spaced apart from each other.

3. The radiant heating panel according to claim 2, characterized in that: The heating wires (11) on the mica winding plates (13) are sequentially connected in series, and the electrodes (12) are provided with more than two; when there are two electrodes (12), the two electrodes (12) are respectively connected to the two ends of the heating wires (11) connected in series; when there are three or more electrodes (12), two of the electrodes (12) are respectively connected to the two ends of the heating wires (11) connected in series, and the remaining electrodes (12) are connected between the two ends of the heating wires (11) connected in series; Alternatively, the heating wires (11) on the mica winding plates (13) are connected in parallel, or the heating wires (11) on the mica winding plates (13) are respectively provided with independent electrodes (12).

4. The radiant heating panel according to claim 1, characterized in that: A plurality of tooth grooves (131) are provided on the edges of the mica winding plate (13), and the heating wire (11) is wound around the tooth grooves (131).

5. The radiant heating panel according to claim 1, characterized in that: The electrode (12) is arranged on a side of the mica substrate (14) facing away from the mica winding plate (13).

6. The radiant heating panel according to claim 1, characterized in that: The mica winding plate (13) and the mica base plate (14) are connected and fixed by rivets (15).

7. A heating device, comprising a base (3), characterized in that: The base (3) is also provided with a radiation heating plate according to any one of claims 1 to 6, the mica substrate (14) of the radiation heating plate faces downward, a radiation heating zone is formed above the radiation heating plate, and a vessel receiving portion is also provided on the base (3).

8. The heating device according to claim 7, characterized in that: A metal radiation plate (4) is also provided at the bottom of the radiation heating plate, and the electrode (12) is insulated and separated from the metal radiation plate (4); and / or a microcrystalline plate (5) is covered on the top of the radiation heating plate, and the microcrystalline plate (5) is fixedly connected to the base (3).

9. The heating device according to claim 7, characterized in that: It also includes a glass container (2) or a ceramic container, which is arranged on the vessel holding portion and is fixedly connected or separately connected to the base (3); or, it also includes a full metal container or a container with a metal bottom, the bottom of the container is insulated and separated from the top surface of the radiation heating plate.

10. The heating device according to claim 9, characterized in that: The bottom of the glass container (2) is coated with a heat-absorbing and light-shielding coating (6).

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