CN206131100U - Spill panel and electrical heating kitchen appliance - Google Patents

Abstract

The utility model relates to a support the spill panel technical field of pot, disclose a spill panel and electrical heating kitchen appliance. Spill panel (1) included the flat portion (2) of microcrystalline glass formation and centered on the lateral wall portion (3) that flat portion (2) set up, wherein, lateral wall portion (3) for flat portion (2) leans out and arranges, be provided with in the lateral wall portion (3) be used for with the outer surface contact of the pot body with the spacing portion (11) spacing to the pot body, spacing portion (11) and perpendicular distance H1 >= 8mm between the flat portion (2). Like this, this spill panel can carry out effectual restraint in order to prevent a pot roll -off to the flat frying pan that has the longer handle grip of grabbing to the pan of placing above that very much for can be all the time keep in contact and continuously be heated convenient and practical with the flat portion of spill panel in the bottom of a boiler.

Description

Concave panel and electric heating kitchen utensil

Technical Field

The utility model relates to a spill panel technical field of support pot specifically relates to a spill panel and an electrical heating kitchen utensil who is provided with this kind of spill panel.

Background

Along with the improvement of living standard of people, induction cookers and electric ceramic cookers are more and more popular. The induction cooker and the electric ceramic cooker are both provided with heating support panels for placing the cooker body. At present, the heating support panels are generally pure flat panels, which are widely used and which enable a more stable contact with the currently marketed pans (which are not provided with a long gripping handle projecting from one side), such as for example soup pots.

However, for the wok with a longer gripping handle formed on one side of the wok, the contact surface between the wok and the flat panel is small, and in addition, due to the biasing effect of the gripping handle, the wok placed on the flat panel can be inclined, so that the wok bottom cannot form good and stable thermal contact with the flat panel, and therefore, a user needs to grip the handle of the wok with one hand during the wok to form larger contact between the wok bottom and the flat panel. Otherwise, the phenomena of incomplete contact and poor temperature measurement occur, and certain inconvenience exists.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a spill panel, this spill panel can carry out effectual restraint in order to prevent that the pot roll-off from inclining to the pan that places above that especially to the frying pan that has longer gripping handle for the bottom of a boiler can keep in contact with the pan of spill panel and continuously be heated, convenient and practical all the time.

In order to achieve the above object, the utility model provides a concave panel, concave panel includes the flat bottom that microcrystalline glass formed and centers on the lateral wall portion that the flat bottom set up, wherein, the lateral wall portion for the flat bottom outwards inclines out and arranges, be provided with on the lateral wall portion be used for with the external surface contact of the pot body with to the spacing portion of the pot body, spacing portion with vertical distance H1 between the flat bottom is more than or equal to 8 mm.

By the technical scheme, the side wall part is surrounded around the flat bottom part and is arranged outwards relative to the flat bottom part, meanwhile, the vertical distance H1 between the limiting part on the side wall part and the flat bottom part is more than or equal to 8mm, so that for a pan which is not provided with a longer gripping handle, such as a soup pan, only the soup pan is required to be placed on the flat bottom part, and for a pan which is provided with a longer gripping handle, when the pan is placed on the flat bottom part, the limiting part on the side wall part can be contacted with the part between the flat bottom and the pan edge of the pan, thereby forming annular supporting and limiting for the pan in the whole circumferential direction, such as the circumferential direction, avoiding the pan from sliding relative to the flat bottom part or inclining under the action of the frying force and the bias of the gripping handle, and simultaneously, the pan cannot be suspended due to the inclined arrangement of the side wall part, the gap between the pan bottom and the flat bottom is avoided, so that the pan bottom and the flat bottom form good and stable contact for continuous heating.

Further, the limiting part extends along the circumferential direction of the side wall part to form a complete annular limiting ring; the obtuse angle A between the side wall part and the flat bottom part is more than or equal to 110 degrees and less than or equal to 160 degrees.

Further, the dimension D between the opposite edges of the flat bottom is 160mm-240 mm.

Further, dimension D is 175mm to 185 mm.

In addition, the side wall portion includes an arc portion.

Further, the concave surface of the arc portion faces the inside of the concave panel.

Further, the side wall portion includes a rim portion connected to a periphery of the arc portion.

Furthermore, the edge part is an arc edge part with an upward convex surface; alternatively, the edge portion is a straight edge portion.

Further, an acute angle B between the edge part and the flat bottom part is more than or equal to 5 degrees and less than or equal to 15 degrees.

In addition, the arc part and the flat bottom part are transited through an inward arc surface of a concave surface; the arc part and the edge part are transited through an arc surface with a convex surface facing upwards.

In addition, the concave panel is an integral stretching piece.

Further, the thickness T of the flat bottom is 3.5mm-5.5mm, and the distance H between the highest point of the concave panel and the outer bottom surface of the flat bottom is 19mm-26 mm.

Furthermore, the thickness T is 4-5mm and the distance H is 20-25 mm.

In addition, the concave panel is circular; alternatively, the concave panel is square, wherein the side wall parts are connected in an arc shape.

In another aspect, the present invention provides an electrically heated kitchen appliance, such as an induction cooker or an electric ceramic cooker, wherein the electrically heated kitchen appliance is provided with a concave panel as described above in any one of the above.

Thus, the advantageous effects of the concave panel as described above, by which the quality and the utility of the electrically heated kitchen appliance such as the induction cooker are remarkably improved.

Further, the electrically heated kitchen appliance is an induction cooker.

Furthermore, the induction cooker comprises an induction cooker upper cover and a decorative locating ring, wherein the decorative locating ring is arranged along the circumferential edge of the concave panel and is assembled and positioned on the induction cooker upper cover, so that the concave panel is positioned in the accommodating space of the induction cooker upper cover.

Other features and advantages of the present invention will be described in detail in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 is a first structural schematic diagram of a concave panel according to an embodiment of the present invention;

fig. 2 is a second structural schematic diagram of a concave panel according to an embodiment of the present invention;

fig. 3 is a third structural schematic diagram of a concave panel according to an embodiment of the present invention;

fig. 4 is a fourth structural schematic diagram of a concave panel according to an embodiment of the present invention;

fig. 5 is a fifth structural schematic diagram of a concave panel according to an embodiment of the present invention;

FIG. 6 is a schematic view of the female panel of FIG. 1 in contact with a pan;

FIG. 7 is a schematic view of the concave panel of FIG. 2 in contact with a pan;

FIG. 8 is a schematic view of the concave panel of FIG. 2 in contact with another pan;

fig. 9 is a schematic structural view of an electromagnetic oven as an electric heating kitchen device according to an embodiment of the present invention;

fig. 10 is an enlarged schematic view of a circled portion in fig. 9.

Description of the reference numerals

1-concave panel, 2-flat bottom, 3-side wall, 4-concave surface, 5-arc part, 6-edge part, 7-convex surface, 8-arc edge part, 9-straight edge part, 10-arc surface, 11-spacing ring, 12-pot, 13-decorative positioning ring, 14-upper cover of induction cooker, 15-coil disc and 16-base.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.

As shown in figures 1, 2, 3, 4 and 5, the concave panel 1 of various shapes comprises a flat bottom 2 and a side wall 3 formed by microcrystalline glass, the side wall 3 surrounds the flat bottom 2 and encloses a cavity with the flat bottom 2, wherein the side wall 3 is arranged obliquely outwards relative to the flat bottom 2, a limiting part 11 (which can have various forms and will be described in detail below) for contacting with the outer surface of the pot body to limit the pot body is arranged on the side wall 3, and the vertical distance H1 between the limiting part 11 and the flat bottom 2 is more than or equal to 8 mm.

The side wall portion 3 has a suitable height that should provide a positive support for the outer circumference of a frying pan provided with a long gripping handle without the user having to grip the handle of the pan with his or her hand. Otherwise, the pan with a longer gripping handle will tilt under the gravity of the handle or the effect of stir-frying, so that the pan bottom cannot form a good contact with the flat bottom 2.

In this technical solution, since the side wall part 3 surrounds the periphery of the pan part 2, and the side wall part 3 is arranged obliquely outward relative to the pan part 2, and at the same time, the vertical distance H1 between the limiting part 11 on the side wall part 3 and the pan part 2 is more than or equal to 8mm, so that for a pan not provided with a longer gripping handle, such as a soup pan (e.g. the pan 12 shown in fig. 7), only the soup pan needs to be placed on the pan part 2, and for a pan provided with a longer gripping handle, such as the pan 12 shown in fig. 8, when such a pan is placed on the pan part 2, the side wall part 3 can contact the part between the pan bottom and the pan rim, so as to form a ring-shaped support for the pan in the whole circumferential direction, such as the circumferential direction or the square direction, and avoid the pan from sliding relative to the pan part 2 under the effect of the turning force of the user, or the pan is inclined under the bias of the gripping handle, that is, as shown in fig. 6, under the limit support of the side wall part 3 to the pan, the pan can still be placed flatly, so that the bottom of the pan is in good contact with the flat bottom, and meanwhile, because the side wall part 3 is arranged obliquely, the frying pan can not be suspended, the gap between the pan bottom and the flat bottom 2 is avoided, and therefore, the pan bottom and the flat bottom 2 are in good and stable contact for continuous heating.

In the concave panel 1 of the present invention, the stopper portion 11 may have various forms. For example, in one form, the spacing portion 11 may be a plurality of circumferentially extending arcuate segments that slightly protrude (1mm-2mm) from the inner peripheral surface of the side wall portion 3, such that the plurality of arcuate segments are circumferentially spaced to support and spacing the pot;

still alternatively, the spacing portion 11 extends circumferentially along the sidewall portion 3 to form a full-circle annular spacing ring; for example, as shown in fig. 1 and 6, the position-limiting portion 11 may be a complete circle of the upper edge of the side wall portion 3 of the concave panel 1, and for example, as shown in fig. 2 and 8, the convex upward arc-shaped edge portion between the arc-shaped portion 5 and the edge portion 6 forms a complete circle of the position-limiting portion 11, so that the pot can be supported and limited in the entire circumferential direction, for example, in the circumferential direction. Further, the obtuse angle A between the side wall part 3 and the flat bottom part 2 is more than or equal to 110 degrees and less than or equal to 160 degrees, preferably 120 degrees to 150 degrees, and in the angle range, the limiting part 11 can form better limiting support for the pot.

In addition, as shown in fig. 1 and 4, the dimension D between the opposite sides of the flat bottom 2 (for example the diameter of a circle, or the dimension between two opposite sides of a square) is 160mm-240mm, so as to enable the concave panel to fit most (for example more than 80%) of the commercially available pots; further, the dimension D between the opposite edges of the pan 2 is 175mm to 185mm, so as to be compatible with substantially all commercially available stockpots, and more than 80% of pots 12 with longer gripping handles.

It will be appreciated that in the concave panel 1 of the present invention, the obliquely arranged side wall portion 3 may be a straight shape, and the side wall of such straight shape may form a good limit for the pan 12 shown in fig. 7, i.e. the circumferential outer surface of the pan 12 will form a circle of contact with the straight side wall portion 3, thereby avoiding the pan 12 sliding on the pan bottom 2.

Or, in another form, in order to better form a more snug fit of the arcuate peripheral surface of the pan 12 of the shape shown in fig. 7, it is preferred that the side wall portion 3 is formed in an arcuate shape as shown in fig. 1-5, and further, in order to form a cubic heat to the pan 12, it is preferred that the side wall portion 3 includes an arcuate portion 5, that is, so that the heating coils disposed below the concave panels can form a packed cubic heat to the pan 2 and arcuate portion 5 simultaneously so that the bottom and sides of the pan 12 are heated simultaneously.

Of course, as shown in fig. 3 and 5, the arc portion 5 may be an arc portion having a convex surface facing the inside of the concave panel 1. Or, still further, to better conform to the curved outer surface of pan 12 for heating, it is preferred that the concave surface 4 of curved portion 5 be directed inwardly of the concave panel, as shown in fig. 1, 2 and 4. Thus, when the pan 12 is placed on the concave panel, the curved outer peripheral surface of the pan 12 will make good contact with the curved portion 5 of the concave surface 4 facing the inside of the concave panel 1, as shown in fig. 7.

Further, the side wall portion 3 of the concave panel 1 of the present invention includes an edge portion 6 connected to the periphery of the arc portion 5. In this way, the annular metal ring will wrap the edge portion 6 of the concave panel 1, which firstly can significantly improve the aesthetic property of the induction cooker, and meanwhile, the concave panel 1 can be stably and reliably assembled and positioned on the induction cooker upper cover through the matching of the annular metal ring and the induction cooker upper cover.

Further, in order to facilitate wrapping of the annular metal ring and more stable and reliable assembly and positioning of the concave panel 1, preferably, as shown in fig. 2 and 4, the edge portion 6 is an arc-shaped edge portion 8, the convex surface 7 of the arc-shaped edge portion 8 faces upward, and the arc-shaped edge portion 8 can also function as an inclined guide, that is, the pan 12 can slide onto the flat bottom portion 2 along the portion of the arc-shaped edge portion 8 that is not wrapped by the metal decorative ring. Of course, such an arcuate edge portion 8 may also facilitate the release of the mould when the female panel 1 is integrally formed.

Of course, yet alternatively, and in the alternative, as shown in fig. 5, the edge 6 is a straight edge 9.

As mentioned above, in order to further facilitate the sliding of the pan 12 onto the pan bottom 2 along the portion of the curved rim portion 8 that is not covered by the decorative metal ring, for improving the ease of use for the user, further, as shown in fig. 4, the rim portion 6 is arranged obliquely, wherein the obtuse angle between the rim portion 6 and the flat bottom 2 is greater than the obtuse angle a between the curved portion 5 and the flat bottom 2.

Further, as shown in fig. 4, the acute angle B between the rim 6 and the flat bottom 2 is 5 ° ≦ B ≦ 15 °, and in such an angular range, the pan 12 will not cause a large impact on the pan 2 while sliding along the rim 6 into the pan 2, thereby increasing the lifetime of the pan 2, and secondly, as shown with reference to fig. 10, when wrapped by the decorative bezel 13, such an inclination of the rim 6 may form as little positioning contact as possible with the decorative bezel 13 while ensuring the wrapping stability, thereby reducing the heat transfer of the concave panel 1 to the decorative bezel 13.

Furthermore, as shown in fig. 2, the transition between the curved part 5 and the flat bottom 2 is made by a curved surface 10 with a concave surface facing inwards, so that, as shown in fig. 7, the corners of the pan 12 of this configuration will make good contact with the curved surface 10. Of course, this arrangement of the arc-shaped faces 10 can avoid the existence of large stress between the flat bottom 2 and the side wall 3 due to sharp transition when the concave panel 1 is integrally formed, thereby being capable of remarkably improving the strength of the concave panel 1 itself.

Of course, as shown in fig. 2, the arc portion 5 and the edge portion 6 are connected by an arc surface transition from the convex surface to the upper surface, and similarly, when the concave panel 1 is integrally formed, the arc edge portion may have a large stress due to a sharp transition between the arc portion 5 and the edge portion, so that the strength of the concave panel 1 itself can be significantly improved. In addition, the arc-shaped edge part can also be used as an annular support ring for supporting the pot, and as shown in fig. 8, the outer circumferential surface of the pot 12 is in good and stable contact with the arc-shaped edge part.

In addition, in order to improve the overall mechanical strength of the concave panel 1, it is preferable that the concave panel 1 is an integral stretching member, that is, a plate member is integrally stretched by a specific process to form the concave panel 1 having the flat bottom portion 2 and the side wall portion 3 arranged obliquely outward.

For example, in a preferred embodiment, the concave panel 1 is circular in shape and has three folded edges, which are angled with respect to each other, and first, a circular pure flat glass-ceramic sheet is prepared in a suitable size. (the size of the substrate is generally 10-15 mm larger than the size and diameter of the molded concave panel, for example, the final shape of the concave panel is that the peripheral diameter is 270mm, the size of the blanking substrate needs to be 300mm, the roundness is kept by material removal processing after molding is facilitated, and the fixing edge is provided for molding and the warping degree of the adjacent edge is controlled conveniently); subsequently, the above-mentioned glass-ceramic plate is clamped together by an upper mold and a lower mold (both of which are capable of forming a forming chamber conforming to the shape of the concave panel), and the periphery of the mold may be provided with a guide structure for ensuring the vertical movement of the mold. (because the mould needs to be switched between high temperature and normal temperature, the mould material can adopt high temperature resistant steel, graphite, ceramic and other temperature resistant materials), then the above components holding the microcrystalline glass plate are placed in a constant temperature oven (commonly called bread oven), because the softening temperature of the microcrystalline glass plate is 900-950 ℃, the microcrystalline glass plate continuously rises to the range of 900-1000 ℃ along with the oven temperature, the oven temperature is kept (the specific keeping time is different because of the shape and depth of the concave panel), the microcrystalline glass structure is softened, under the action of gravity and upper mould pressing force (other external force can be applied, such as the assistance of vacuumizing force), the central part of the microcrystalline glass plate is stretched and then laid down, and finally the concave panel shape which is consistent with the cavity formed by the upper mould and the lower mould is formed. And after the concave panel is formed, cooling the concave panel in a constant temperature box, reducing the temperature to a 650-750 interval (generally the optimal crystallization interval is 700-720 ℃), cultivating the microcrystalline glass crystal in the interval, keeping the temperature for about 15 minutes, reducing the furnace temperature after the crystal is formed, and cooling and forming the microcrystalline glass concave panel.

In addition, because the microcrystalline glass concave panel belongs to the process of glass secondary hot bending forming, the crystal structure of the concave panel can be influenced by over-stretching, so that the mechanical impact performance of the concave panel is weakened. However, in the present application, since the bottom of the concave panel 1 is designed to be flat, it is kept flat and less subject to stretching during the whole forming process, so that the crystal structure is well preserved, in other words, the mechanical impact strength of the flat bottom 2 is also enhanced accordingly.

In addition, the concave panel may have a weak side wall structure and weak impact strength due to too deep drawing depth, so that, in order to improve the strength of the side wall part 3 during drawing, as shown in fig. 4, the obtuse angle between the arc-shaped part 5 and the flat bottom part 2 is a; the distance H between the highest point of the concave panel and the outer bottom surface of the flat bottom 2 (which can also be considered as the vertical height of the sidewall 3); wherein the obtuse angle a is proportional to the distance H. Thus, the smaller the obtuse angle a, the smaller the height it allows stretching, whereas the larger the obtuse angle a, the larger the height it allows stretching.

Further, in a preferred form, the obtuse angle A between the curved portion 5 and the flat bottom portion 2 is 110 DEG to 160 DEG, preferably 120 DEG to 150 DEG, within which a suitable drawing height is provided to prevent the glass crystal sheet from being pulled apart during the softening and drawing.

Of course, an appropriate drawing height may also be set according to the thickness of the crystallized glass plate, for example, in view of light weight and cost, the thickness of the crystallized glass plate, that is, the thickness T of the flat bottom 2 is 3.5mm to 5.5mm, and the distance H between the highest point of the concave panel and the outer bottom surface of the flat bottom 2 is 19mm to 26mm, so that the thickness and the drawing distance H can ensure that the side wall portion 3 has sufficient strength, and at the same time, the flat bottom 2 is kept flat throughout the forming process, is rarely drawn, and the thickness is kept constant, so that the crystal structure is well preserved, in other words, the mechanical impact strength of the flat bottom 2 is also correspondingly strengthened.

Furthermore, the thickness T is 4-5mm and the distance H is 20-25 mm. More preferably, the thickness is 4.5mm and the distance H is 22.5 mm.

The test for a thickness of 3.5mm to 5.5mm and a distance H of 19mm to 26mm also passes, i.e. the test conditions: and (3) selecting a center point of the flat bottom part 2 and any two diagonal lines of the flat bottom part 2 to carry out an impact test, wherein the flat bottom part 2 and the joint of the flat bottom part 2 and the side wall part 3 are kept intact, and in addition, the side wall part 3 has no cracks.

In addition, the concave panel 1 of the utility model can be round; or the concave panel 1 is in a special shape such as a square or triangle, wherein the side wall parts 3 are connected in an arc shape, thereby meeting different requirements of different users.

Furthermore, the present invention also provides an electrically heated kitchen appliance, for example an induction cooker such as that shown in figures 9 and 10 or an electric ceramic cooker, provided with a concave panel as described in any one of the above.

Thus, as described above, the quality and utility of the electrically heated kitchen appliance such as the induction cooker are remarkably improved by the concave panel.

As mentioned above, the electrically heated kitchen appliance is preferably an induction hob, which, as shown with reference to fig. 9 and 10, comprises an induction hob upper cover 14 and a decorative collar 13, wherein the decorative collar 13 is arranged along the circumferential rim of the concave panel 1 and fittingly positioned onto the induction hob upper cover 14, e.g. the decorative collar 13 may be fittingly positioned into a ring-shaped collar surrounding the receiving space such that the concave panel 1 is located within the receiving space of the induction hob upper cover 14. In this case, it is clear that the concave panel 1 can be assembled as a single component by means of the decorative collar 13 wrapped on its edge 6 into the annular groove of the induction hob cover 14, while the induction hob cover 14 can be fixedly arranged on the base 16, and the coil disc 15 is located inside the oven and arranged on the base 16. Further, as shown in fig. 9, the shape of the coil panel 15 and the shape of the concave panel 1 are adapted to each other, so that the bottom and the side of the pot can be heated at the same time to form a three-dimensional heating, thereby improving the heating efficiency.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the details of the above embodiments, and the technical concept of the present invention can be within the scope of the present invention to perform various simple modifications to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the present invention does not separately describe various possible combinations.

In addition, various embodiments of the present invention can be combined arbitrarily, and the disclosed content should be regarded as the present invention as long as it does not violate the idea of the present invention.

Claims (17)

1. Concave panel, characterized in that the concave panel (1) comprises a flat bottom (2) formed of devitrified glass and a sidewall portion (3) arranged around the flat bottom (2), wherein the sidewall portion (3) is arranged inclined outwards with respect to the flat bottom (2),

the side wall part (3) is provided with a limiting part (11) which is used for contacting with the outer surface of the pot body to limit the pot body, and the vertical distance H1 between the limiting part (11) and the flat bottom part (2) is more than or equal to 8 mm.

2. The concave panel according to claim 1, wherein the retainer portion (11) extends circumferentially along the sidewall portion (3) to form a full-circle annular retainer ring;

the obtuse angle A between the side wall part (3) and the flat bottom part (2) is more than or equal to 110 degrees and less than or equal to 160 degrees.

3. Concave panel according to claim 1, characterised in that the dimension D between the opposite edges of said flat bottom (2) is 160-240 mm.

4. The concave panel according to claim 3, wherein dimension D is 175mm to 185 mm.

5. The concave panel according to claim 1, wherein the side wall portion (3) comprises an arc-shaped portion (5).

6. The concave panel according to claim 5, wherein the concavity (4) of the curved portion (5) is directed towards the inside of the concave panel.

7. The concave panel according to claim 5, wherein the side wall portion (3) comprises a rim portion (6) connected to the perimeter of the curved portion (5).

8. The concave panel according to claim 7, wherein the edge portion (6) is an arc-shaped edge portion (8) with a convex surface (7) facing upwards;

or,

the edge part (6) is a straight edge part (9).

9. The concave panel according to claim 7, wherein the acute angle B between the rim (6) and the flat bottom (2) is 5 ° ≦ B ≦ 15 °.

10. The concave panel according to claim 7, characterised in that the curved portion (5) and the flat bottom (2) transition between them by a curved surface (10) concave inwards;

the arc part (5) and the edge part (6) are transited through an arc surface with a convex surface upward.

11. Concave panel according to any one of claims 1 to 10, characterised in that the concave panel (1) is a one-piece stretch.

12. Concave panel according to claim 11, characterized in that the thickness T of the flat bottom (2) is between 3.5mm and 5.5mm and the distance H between the highest point of the concave panel and the outer bottom surface of the flat bottom (2) is between 19mm and 26 mm.

13. The concave panel according to claim 12, wherein the thickness T is between 4 and 5mm and the distance H is between 20 and 25 mm.

14. The concave panel according to claim 1, characterized in that said concave panel (1) is circular;

or the concave panel is square, wherein the side wall parts (3) are connected in an arc shape.

15. An electrically heated kitchen appliance, characterized in that it is provided with a concave panel according to any of claims 1-14.

16. The electrically heated kitchen appliance of claim 15, wherein the electrically heated kitchen appliance is an induction cooker.

17. Electrically heated kitchen appliance according to claim 16, characterized in that the induction hob comprises an induction hob upper cover (14) and a decorative positioning ring (13), wherein,

the decorative positioning ring (13) is arranged along the circumferential edge of the concave panel (1) and is assembled and positioned on the induction cooker upper cover (14), so that the concave panel (1) is positioned in the accommodating space of the induction cooker upper cover (14).