Heating plate for household electric heating appliance

Abstract

The utility model relates to the technical field of electric heaters, in particular to a heating plate for a household electric heating appliance, which comprises surface layer glass and bottom layer glass which are arranged in parallel at intervals, an insulating layer positioned between the surface layer glass and the bottom layer glass, and a heating layer attached to one side, facing the surface layer glass, of the bottom layer glass, a gap is formed between the heating layer and the surface glass, and the surface glass is used as a heating surface for external heating. The double-layer glass is adopted, the heating layer is attached to the bottom-layer glass, the surface-layer glass is used in an exposed mode, and the surface-layer glass is evenly heated through heat radiation of the heating layer; the surface glass is separated from the bottom glass, so that the timeliness of heat conduction is ensured, and the problem that the leakage current exceeds the standard due to the fact that the glass becomes a semiconductor at high temperature is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electric heater, in particular to a kind of heating plate for domestic electric heating appliance. BACKGROUND

[0002] Nowadays, with the improvement of people's living standards, the types of kitchen electric heating appliances used in daily life are also increasing. The traditional kitchen electric heating appliance uses electric heating wire heating, but it has its limitations. For example, in the case of using a large-area heating plate to fry food, the electric heating wire heating is easy to cause uneven temperature of the heating plate. The area close to the electric heating wire has too high temperature, while the area far from the electric heating wire has lower temperature, making it difficult to heat the heating plate evenly. To solve this problem, a new heating structure of the heating plate is needed to make the heating plate heat evenly. SUMMARY

[0003] Therefore, the utility model provides a kind of heating plate for domestic electric heating appliance to solve the problem that traditional electric heating wire heating plate is difficult to heat evenly.

[0004] The utility model provides a kind of heating plate for domestic electric heating appliance, including parallel and interval arrangement's surface layer glass and bottom layer glass, the insulating layer between surface layer glass and bottom layer glass, and the heating layer attached to the side of bottom layer glass towards surface layer glass, there is gap between the heating layer and the surface layer glass, and the surface layer glass is used to heat object.

[0005] Optionally, the side of the heating layer towards the bottom layer glass is provided with two silver paste electrodes, the end of the silver paste electrode is provided with a connecting electrode, and the bottom layer glass is provided with a through hole for the connecting electrode to pass through and connect the wire.

[0006] Optionally, the periphery of the surface layer glass and the bottom layer glass is provided with a closure, and the closure is used to close the edge of the gap between the surface layer glass and the bottom layer glass.

[0007] Optionally, the connecting electrode includes a first isolation part and a first lead-out part connected in L shape, the first isolation part is sheet-shaped and clamped between the surface layer glass and the bottom layer glass, and the first lead-out part connects the wire through the through hole.

[0008] Optionally, the first lead-out part includes a base plate and side wing plates located on opposite sides of the base plate, and the two side wing plates and the base plate form a slot, and the slot is used to insert the wire.

[0009] Optionally, the connecting electrode includes a second isolation part and a second lead-out part connected in T shape, the second isolation part is sheet-shaped and clamped between the surface layer glass and the bottom layer glass, and the second lead-out part connects the wire through the through hole.

[0010] Optionally, the second lead-out part is a threaded stud, a terminal is sleeved on the threaded stud, the terminal is connected with a wire, a nut is threadedly connected on the threaded stud, and the nut is used for pressing the terminal against the surface of the bottom glass.

[0011] Optionally, an insulating cover is arranged on the end of the connecting electrode penetrating through the through hole, and the insulating cover is used for covering the conductive part.

[0012] Optionally, the heating layer is a layer of resistive heating material, the layer of resistive heating material is a layer of carbon paste or a layer of metal oxide film, two silver paste layers are arranged on the heating layer, and the connecting electrode is connected with the silver paste layers.

[0013] Optionally, the surface glass and the bottom glass are both temperature-resistant glasses, and the temperature-resistant glasses are microcrystalline glass or quartz glass.

[0014] The technical scheme of the utility model has the advantages that:

[0015] 1. Double-layer glass is adopted, the bottom glass is attached with a heating layer, the surface glass is used in a naked state, and the surface glass is uniformly heated through the heat radiation of the heating layer.

[0016] 2. Double-layer glass is adopted, the surface glass is separated from the bottom glass, the timeliness of heat conduction is ensured, and the problem that the glass becomes a semiconductor at high temperature and thus the current leakage exceeds the standard is solved.

[0017] 3. Double-layer glass is adopted, the periphery is sealed through a sealing member, oxygen can be isolated to a certain extent, the internal heating material is protected, and the heating material is prevented from being oxidized by air. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of the drawings.

[0019] Figure 1 It is a front view of the heating plate in the embodiment of the application;

[0020] Figure 2 It is a sectional view of the heating plate in the embodiment of the application;

[0021] Figure 3 It is a connection schematic view of the connecting electrode and the wire in the embodiment of the application;

[0022] Figure 4 It is a sectional view of the heating plate in the embodiment of the application.

[0023] In the figure: surface glass 1, bottom glass 2, heating layer 3, silver paste electrode 4, connecting electrode 5, first isolation part 51, first lead-out part 52, base plate 521, side wing plate 522, slot 523, second isolation part 53, second lead-out part 54, closure 6, insulating cover 7, wire 8, terminal 9, nut 10, frame 11, clamping groove 111, first sealing plug 112, second sealing plug 113, heat insulation layer 12, bottom plate 13, control box 14, baking net 15, supporting leg 16, concave disc 17, insulating layer 18. DETAILED DESCRIPTION

[0024] The specific embodiments of the present application will be described below in detail with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the description of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0025] Unless otherwise explicitly specified and limited, the terms "arrange", "mount", "connect" and the like should be interpreted broadly, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0026] The terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the present application is used, and are only for the convenience of description and simplification of description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0027] The terms "first", "second", "third" and the like are only for distinguishing similar attributes of elements, and do not indicate or imply relative importance or a particular order.

[0028] The terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, in addition to including the listed elements, other elements not explicitly listed can also be included.

[0029] Please refer to Figure 1 and Figure 2The utility model discloses a kind of heating plates for household electric heating appliances, including parallelly arranged surface layer glass 1 and bottom layer glass 2, the insulating layer 18 being arranged between surface layer glass 1 and bottom layer glass 2, and the heating layer 3 being arranged between two layers of glass;Wherein, the area of insulating layer 18 is greater than heating layer 3, insulating layer 18 completely separates surface layer glass 1 and heating layer 3, insulating layer 18 preferably mica, glass fiber cloth or insulating coating can also be used, insulating coating is coated on heating layer 3 or on the inner side of surface layer glass 1;Surface layer glass 1 and bottom layer glass 2 preferably use temperature-resistant glass, for example, microcrystalline glass or quartz glass.The edge of surface layer glass 1 and bottom layer glass 2 is aligned, and the edge is sealed by closure 6, which can use high-temperature-resistant sealant.Surface layer glass 1 and bottom layer glass 2 are slightly separated, forming a gap, and the closure 6 of edge sealing makes the gap somewhat isolated from oxygen.

[0030] Please refer to Figure 2 The inner side of bottom layer glass 2, i.e. the side facing surface layer glass 1, is attached with silver paste layer and resistive heating material layer in sequence; the silver paste layer is two long and narrow strips, serving as silver paste electrodes 4, and the two silver paste electrodes 4 are positive and negative respectively; the resistive heating material layer serves as heating layer 3, covers the silver paste layer, and the orthographic projection of the resistive heating material layer on surface layer glass 1 covers the use surface of surface layer glass 1; the resistive heating material layer can be carbon paste layer or metal oxide film layer. The outer surface of heating layer 3 (the surface facing surface layer glass 1) is flat, parallel to the inner side of surface layer glass 1 and has a distance. The silver paste electrodes 4 are located at the two side edges of heating layer 3, and the ends of the silver paste electrodes 4 are provided with connecting electrodes 5, which are connected to power supply through wires 8. The heating layer 3 is heated by electrifying the carbon paste, thereby radiating heat to surface layer glass 1. Surface layer glass 1 is used bare, and can directly contact food.

[0031] The heating plate proposed in the embodiment has the following advantages: double-layer glass is used, bottom layer glass 2 is attached with heating layer 3, and surface layer glass 1 is used bare. The heating layer 3 radiates heat to make surface layer glass 1 heat evenly. Double-layer glass is used, surface layer glass 1 is separated from bottom layer glass 2, which not only ensures the timeliness of heat conduction, but also solves the problem that glass becomes a semiconductor at high temperature, thereby leaking excessive current. Double-layer glass is used, and the periphery is sealed by closure 6, which can isolate oxygen to some extent, protect the internal heating material, and avoid oxidation by air.

[0032] Further, please refer to Figure 2 Part of the connecting electrodes 5 is located in the gap between the double-layer glass, and the rest part extends to the back of bottom layer glass 2, i.e. the side of bottom layer glass 2 facing away from surface layer glass 1. The part of the connecting electrodes 5 located in the gap between the double-layer glass has a thickness greater than the distance between heating layer 3 and the inner side of surface layer glass 1. When installing, the double-layer glass clamps the connecting electrodes 5, and then the closure 6 is arranged at the edge.

[0033] Specifically, the bottom glass 2 is provided with a through hole for the connecting electrode 5 to pass through and connect the lead wire 8, and the through hole can be filled with high-temperature-resistant sealant to seal the through hole. Figure 1 The end of the connecting electrode 5 passing through the through hole is provided with an insulating cover 7, which can be in the form of a cap or be covered by insulating glue, as long as it can cover the conductive part.

[0034] Two forms of the connecting electrode 5 are shown as follows:

[0035] The first form is shown in Figure 2 The connecting electrode 5 includes a first isolation part 51 and a first lead-out part 52 connected in an L shape, the first isolation part 51 is in the form of a sheet sandwiched between the surface glass 1 and the bottom glass 2, and the first lead-out part 52 connects the lead wire 8 through the through hole in the bottom glass 2. Figure 3 The first lead-out part 52 includes a base plate 521 and side wing plates 522 located on opposite sides of the base plate 521, the side wing plates 522 are integrally formed with the base plate 521, and the two side wing plates 522 are located on the same side of the base plate 521 and close to each other to form a slot 523 with the base plate 521, and the lead wire 8 is inserted into the slot 523 in an interference fit.

[0036] The second form is shown in Figure 4 The connecting electrode 5 includes a second isolation part 53 and a second lead-out part 54 connected in a T shape, the second isolation part 53 is in the form of a sheet sandwiched between the surface glass 1 and the bottom glass 2, and the second lead-out part 54 connects the lead wire 8 through the through hole, the second lead-out part 54 is in the form of a threaded stud and is sleeved with a terminal 9 connected to the end of the lead wire 8, and a nut 10 is threadedly connected to the second lead-out part 54, and the nut 10 is used to press the terminal 9 against the surface of the bottom glass 2.

[0037] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A heating plate for a household electric heating appliance, characterized in that, The application relates to a heating layer for heating objects, which comprises parallel and spaced surface glass and bottom glass, an insulation layer between the surface glass and the bottom glass, and a heating layer attached to the side of the bottom glass facing the surface glass, with a gap between the heating layer and the surface glass.

2. The heat-generating plate for a domestic electric heating appliance according to claim 1, characterized in that, The side of the heating layer facing the bottom glass is provided with two silver paste electrodes, and the end of the silver paste electrode is provided with a connecting electrode; the bottom glass is provided with a through hole for the connecting electrode to pass through and connect a lead wire.

3. The heat-generating plate for a domestic electric heating appliance according to claim 1, characterized in that, The periphery of the surface glass and the bottom glass is provided with a closure for closing the edge of the gap between the surface glass and the bottom glass.

4. The heat-generating plate for a domestic electric heating appliance according to claim 2, characterized in that, The connecting electrode comprises a first isolation part and a first lead-out part connected in an L shape, the first isolation part is in a sheet shape and is clamped between the surface glass and the bottom glass, and the first lead-out part passes through the through hole to connect a lead wire.

5. The heat-generating plate for a domestic electric heating appliance according to claim 4, characterized in that, The first lead-out part comprises a base plate and side wing plates located on the opposite sides of the base plate, the two side wing plates and the base plate form a slot for inserting a lead wire.

6. The heat-generating plate for a domestic electric heating appliance according to claim 2, characterized in that, The connecting electrode comprises a second isolation part and a second lead-out part connected in a T shape, the second isolation part is in a sheet shape and is clamped between the surface glass and the bottom glass, and the second lead-out part passes through the through hole to connect a lead wire.

7. The heat-generating plate for a domestic electric heating appliance according to claim 6, characterized in that, The second lead-out part is a threaded stud, a terminal is sleeved on the threaded stud, the terminal connects a lead wire, and a nut is threadedly connected on the threaded stud, and the nut is used for pressing the terminal on the surface of the bottom glass.

8. The heat-generating plate for a domestic electric heating appliance according to claim 5 or 7, characterized in that, The end of the connecting electrode passing through the through hole is provided with an insulating cover for covering a conductive part.

9. The heat-generating plate for a domestic electric heating appliance according to claim 8, characterized in that, The heating layer is a resistive heating material layer, the resistive heating material layer is a carbon paste layer or a metal oxide film layer, two silver paste layers are arranged on the heating layer, and the connecting electrode connects the silver paste layers.

10. The heat-generating plate for a domestic electric heating appliance according to claim 9, characterized in that, The surface glass and the bottom glass are both temperature-resistant glass, and the temperature-resistant glass is microcrystalline glass or quartz glass.

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