CN219389728U - Upper burner, oven and oven range - Google Patents

Abstract

The application discloses an upper burner, an oven and an oven range. The upper burner comprises a bottom plate and a top plate, wherein the bottom plate is provided with a fire outlet hole, the top plate is overlapped with the bottom plate and is connected with the bottom plate, a first area and a second area surrounding the first area are arranged, the second area is arranged convexly relative to the outer surface of the top plate, the first area is arranged concavely relative to the outer surface of the second area, and an air inlet cavity communicated with the fire outlet hole is formed between the first area and the bottom plate and between the second area and the bottom plate. According to the technical scheme, the air inlet cavity is formed between the first area and the second area and the bottom plate, after the fuel gas is introduced into the air inlet cavity, the fuel gas is sprayed out from the fire outlet hole and then ignited to form flame, the first area is concavely arranged relative to the outer surface of the second area, the structural strength of the whole top plate is increased, the natural vibration frequency of the whole top plate is changed, the occurrence of top plate resonance is restrained, and the vibration noise of a combustion process is weakened.

Description

Upper burner, oven and oven range

Technical Field

The application relates to the technical field of gas ovens, in particular to an upper burner, an oven and an oven range.

Background

The gas oven is provided with an upper burner which heats food materials from top to bottom, in general, the upper burner is provided with a top plate and a bottom plate, an air inlet cavity is formed between the top plate and the bottom plate, when the upper burner just begins to burn, the temperature of the upper burner is lower than the temperature in a stable combustion state, part of heat of flame is taken away by the upper burner, the flame propagation speed changes relative to the air flow speed in the heating process of the upper burner, the combustion state becomes unstable, the flame periodically swings, so that vibration combustion is formed, and the vibration is transmitted to the top plate through the air inlet cavity to cause resonance of the top plate, so that noise is generated.

Disclosure of Invention

The present application aims to solve, at least to some extent, the technical problems in the related art. For this purpose, the present application proposes an upper burner.

To achieve the above object, the present application discloses an upper burner comprising:

a bottom plate provided with a fire hole; and

the top plate is overlapped with the bottom plate and is connected with the bottom plate, a first area and a second area surrounding the first area are arranged, the second area is arranged protruding relative to the outer surface of the top plate, the first area is arranged concavely relative to the outer surface of the second area, and an air inlet cavity communicated with the fire outlet hole is formed between the first area and the bottom plate and between the second area and the bottom plate.

In some embodiments of the present application, the periphery of the first region is provided with an annular wall, and the annular wall is disposed obliquely from the second region toward the center of the first region.

In some embodiments of the present application, the first region and the second region are stamped.

In some embodiments of the present application, the bottom plate and the top plate are overlapped to form an injection structure, the injection structure includes a corner runner, and the corner runner is adapted to change the airflow direction and is communicated with the air inlet cavity.

In some embodiments of the present application, the corner runner meets the second region.

In some embodiments of the present application, the corner flow channel is provided with an outer flow channel wall and an inner flow channel wall, the outer flow channel wall being arcuate.

In some embodiments of the present application, the first region is offset relative to the orientation of the inner flow path wall toward the orientation of the outer flow path wall.

In some embodiments of the present application, the outer contours of the first region and the second region are rounded rectangles, the corner runner is disposed on one side of the second region in the length direction, and the first region is disposed in the width direction of the second region and is not centered with respect to the second region.

In some embodiments of the present application, the top panel is further provided with a third region surrounding the second region, the third region and the bottom panel are connected, one of the third region and the bottom panel is provided with a flange for clamping the other.

The application also discloses an oven, the oven includes above-mentioned upper burner.

The application also discloses an oven kitchen, oven kitchen includes above-mentioned oven.

According to the technical scheme, the air inlet cavity is formed between the first area and the second area and the bottom plate, after the fuel gas is introduced into the air inlet cavity, the fuel gas is sprayed out from the fire outlet hole and then ignited to form flame, the first area is concavely arranged relative to the outer surface of the second area, the structural strength of the whole top plate is increased, the natural vibration frequency of the whole top plate is changed, the occurrence of top plate resonance is restrained, and the vibration noise of a combustion process is weakened.

Additional advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other designs can be obtained according to the structures shown in these drawings without the need of creative efforts for a person skilled in the art.

FIG. 1 is a schematic view of an oven range in some embodiments;

FIG. 2 is a schematic view of an oven range in some embodiments;

FIG. 3 is a schematic diagram of an oven in some embodiments;

FIG. 4 is an exploded view of an oven in some embodiments;

FIG. 5 is a schematic view of an upper burner in some embodiments;

FIG. 6 is an exploded view of the upper burner in some embodiments;

FIG. 7 is a top view of an upper burner in some embodiments;

FIG. 8 is a cross-sectional view of an upper burner in some embodiments.

Reference numerals illustrate:

oven range 100;

oven 1000;

a first chamber 1100, housing cavity 1110, opening 1111;

an upper burner 1200;

a bottom plate 1210, fire holes 1211;

top plate 1220, first region 1221, second region 1222, third region 1223, annular wall 1224, flange 1225;

the injection structure 1230, the first flow path 1231, the air inlet 1232, the corner flow path 1233, the outer flow path wall 1234, the inner flow path wall 1235;

an intake cavity 1240;

a lower burner 1300;

a grill 1600;

a door 1700;

a cooking appliance 2000.

The realization, functional characteristics and advantages of the present application will be further described with reference to the embodiments, referring to the attached drawings.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present application are merely used to explain the relative positional relationship, movement, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is correspondingly changed.

In the present application, unless explicitly specified and limited otherwise, the terms "coupled," "secured," and the like are to be construed broadly, and for example, "secured" may be either permanently attached or removably attached, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In addition, descriptions such as those related to "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated in this application. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be regarded as not exist and not within the protection scope of the present application.

A first aspect of the present application discloses an upper burner and a second aspect of the present application discloses an oven.

The oven is a household appliance for baking food materials in a relatively closed space by using heat, and generally, the oven comprises a gas type oven and an electric heating type oven, wherein the gas type oven uses combustion of gas as a heat source, the electric heating type oven uses energizing heating of a heating tube as a heat source, and an upper burner is described in detail in the gas type oven (hereinafter referred to as an oven).

As shown in fig. 3 and 4, the oven 1000 has a first chamber 1100 and a second chamber, the first chamber 1100 occupies a certain volume in space, thereby enclosing a receiving cavity 1110, forming a hollow structure, the receiving cavity 1110 is used for placing a grill 1600, the grill 1600 can be pushed into and pulled out of the receiving cavity 1110 by a user, food is placed on the grill 1600, and baking of the food is achieved in the receiving cavity 1110 by using high temperature. The front of the receiving cavity 1110 forms an opening 1111 through which the grill 1600 enters and exits the receiving cavity 1110, and the toaster 1000 has a door 1700, the door 1700 closing and opening the opening 1111. The first chamber 1100 is provided with an upper burner 1200 and a lower burner 1300, the upper burner 1200 is in a plate shape with a flat structure, is arranged at the top of the first chamber 1100 to heat food materials from top to bottom, and the lower burner 1300 is in a tube shape, is arranged at the bottom of the first chamber 1100 to heat the food materials from bottom to top, so that the food materials are uniformly baked. The upper burner 1200 and the lower burner 1300 comprise an air inlet cavity 1240 and a fire outlet 1211, and the fuel gas is introduced into the air inlet cavity 1240 and then sprayed out from the fire outlet 1211 to be ignited to form flame, thus forming high temperature to realize the baking of the food material. In general, the lower burner 1300 includes two lower burners 1300, which are respectively located at the left side and the right side of the accommodating cavity 1110, and the lower burner 1300 located at the left side is used for baking food materials from bottom to top and from left to right, and the lower burner 1300 located at the right side is used for baking food materials from bottom to top and from right to left. In the process of baking food materials, smoke is generated in the accommodating cavity 1110, the smoke needs to be timely discharged, specifically, the second cavity forms a hollow structure and is surrounded to form a discharge flue, the accommodating cavity 1110 is communicated with the discharge flue, and the smoke can be discharged into the discharge flue and then discharged through the discharge flue.

As mentioned above, the upper burner 1200 is in a flat structure, for example, as shown in connection with fig. 5 to 8, the upper burner 1200 includes a bottom plate 1210 and a top plate 1220, the bottom plate 1210 is positioned under the top plate 1220, and the two are overlapped with each other to be connected together, the bottom plate 1210 is provided with a fire outlet 1211, when the upper burner 1200 is mounted to a predetermined position of the oven 1000, i.e., the top of the first chamber 1100, the bottom plate 1210 faces the accommodating cavity 1110, and the top plate 1220 faces away from the accommodating cavity 1110, so that the fire outlet 1211 opened on the bottom plate 1210 is opened toward the accommodating cavity 1110, and when the fuel gas is ejected from the fire outlet 1211, flames are generated toward the accommodating cavity 1110.

Referring to fig. 8, when the top plate 1220 and the bottom plate 1210 are connected, an air intake cavity 1240 is formed between the top plate 1220 and the bottom plate 1210, and the air intake cavity 1240 has a certain volume, so that the fuel gas carries air into the air intake cavity 1240 to be mixed and then is ejected from the fire hole 1211. The oven 1000 is provided with an ignition needle which is adjacent to the fire hole 1211 of a part of the upper burner 1200, and the ignition needle is discharged at the tip to generate an electric spark so as to ignite fuel gas to form flame, and the flame transfers fire to realize the combustion of all the fire holes 1211. When the upper burner 1200 just starts to work, the temperature of the upper burner 1200 is lower than the temperature in the stable combustion state, part of heat of flame is taken away by the upper burner 1200, the propagation speed of flame is changed relative to the air flow speed in the heating process of the upper burner 1200, balance is broken, so that the combustion state of the upper burner 1200 becomes unstable, the flame periodically swings to form vibration combustion, vibration is transmitted to the top plate 1220 through the air inlet cavity 1240, resonance of the top plate 1220 is easily caused, noise is generated, and particularly, the position of the top plate 1220, which is matched with the bottom plate 1210 to form the air inlet cavity 1240, forms a certain span, and resonance is more obvious.

In order to avoid resonance of the top plate 1220, two areas, namely, a first area 1221 and a second area 1222 are provided on the top plate 1220, the second area 1222 is convexly provided with respect to the outer surface of the top plate 1220, as shown in fig. 5 and 8, the second area 1222 is convexly provided upward, and the first area 1221 is designed to be surrounded by the second area 1222, and a certain distance is provided between the first area 1221 and the bottom plate 1210 due to the convexly provided second area 1222, so that an air inlet cavity 1240 is formed by the cooperation of the second area 1222 and the first area 1221 with the bottom plate 1210. In addition, the first area 1221 is further recessed with respect to the outer surface of the second area 1222, the first area 1221 faces downward Fang Ao, and by the concave-convex arrangement of the second area 1222 and the first area 1221, the structural strength of the top plate 1220, especially the second area 1222 and the first area 1221, is enhanced, so that the inherent vibration frequency of the top plate 1220 is changed, and the vibration frequency of the top plate 1220 is shifted with respect to the vibration frequency transmitted through the air intake cavity 1240, so that the top plate 1220 is not easy to resonate, and thus noise when the upper burner 1200 just starts to operate can be reduced. In addition, by lifting the second region 1222 and the first region 1221 with respect to the bottom plate 1210 to form the air intake cavity 1240, the bottom plate 1210 is prevented from being deformed downward or the degree of deformation of the bottom plate 1210 is reduced to avoid occupation of the space of the accommodating cavity 1110, so that the loading capacity of the accommodating cavity 1110 can be ensured.

The outer surface is the surface facing away from the intake cavity 1240, and correspondingly the surface facing the intake cavity 1240 is regarded as the inner surface, and the second region 1222 is arranged protruding with respect to the outer surface of the top plate 1220, that is to say the second region 1222 is arranged recessed with respect to the inner surface of the top plate 1220, such that the second region 1222 forms a cavity open towards the bottom plate 1210, which cavity forms part of the intake cavity 1240. As for the first area 1221, the first area 1221 is concavely disposed with respect to the outer surface of the second area 1222 to form a cavity opening toward the bottom plate 1210, and then the first area 1221 is convexly disposed with respect to the inner surface of the second area 1222, which corresponds to the structure that the first area 1221 as a whole protrudes into the air intake cavity 1240. For example, for the second region 1222 and the first region 1221, the first region 1222 and the first region 1221 are punched from bottom to top so that the second region 1222 and the first region 1221 are both in a bump shape, and then the first region 1221 is punched from top to bottom so that the first region 1221 is concave, and the periphery forms an annular wall 1224.

Since the first area 1221 appears concave on the outer surface of the top plate 1220, that is, the concave first area 1221 occupies the space of the air intake cavity 1240, the first area 1221 is blocked to cause a pressure drop when the fuel gas flows, and the annular wall 1224 is designed to be inclined to reduce the air flow resistance, and the annular wall 1224 is inclined from the second area 1222 toward the center of the first area 1221 as shown in fig. 8, so that the fuel gas flows in the air intake cavity 1240 even if the fuel gas is blocked by the first area 1221, the fuel gas can be better guided due to the inclined design of the annular wall 1224, and the air flow resistance is reduced. Furthermore, the annular wall 1224 is also designed to be inclined, making it easier to release the die when the first region 1221 is punched.

Optionally, in some embodiments of the present application, the second regions 1222 and the first regions 1221 are stamped to reduce manufacturing difficulty. Specifically, the top plate 1220 is a metal plate, for example, a sheet metal part, which has high ductility, and is not only beneficial to design of modeling, but also not easy to be damaged during stamping. As described above, the second region 1222 is punched from bottom to top, and on the basis of this, the first region 1221 is punched from top to bottom. It is also possible to simultaneously clamp the outer surface and the inner surface of the top plate 1220 using a mold while punching the second region 1222 and the first region 1221.

In general, the upper burner 1200 needs to achieve air intake based on the injection structure 1230, the so-called injection structure adopts the venturi principle, and when the gas ejected from the nozzle (a component in the oven 1000) is directed to the injection structure 1230, the gas drives the outside air to enter synchronously, so that the gas and the air are mixed in the air intake cavity 1240, which is more beneficial for combustion. Referring to fig. 6, in some embodiments of the present application, the top plate 1220 and the bottom plate 1210 are overlapped and connected to form the injection structure 1230, that is, the injection structure 1230 is not required to be separately provided, and the injection structure 1230 can be formed after the top plate 1220 and the bottom plate 1210 are overlapped by forming corresponding structures on the top plate 1220 and the bottom plate 1210, which is simpler and more convenient. The injection structure 1230 comprises a corner runner 1233, and the corner runner 1233 is connected with the air inlet cavity 1240, so that the corner runner 1233 can change the direction of the air flow, and thus, the gas and the air are prevented from rushing into the air inlet cavity 1240 to generate a larger pressure drop.

Specifically, as shown in fig. 5 and 6, the injection structure 1230 includes two flow channels, namely a first flow channel 1231 and a corner flow channel 1233, where the first flow channel 1231 is communicated with the corner flow channel 1233, the first flow channel 1231 is provided with an air inlet 1232, and the corner flow channel 1233 is communicated with the air inlet cavity 1240, the air nozzle is aligned with the air inlet 1232 to spray fuel gas, the fuel gas enters the first flow channel 1231 through the air inlet 1232, under the action of venturi principle, external air also enters the first flow channel 1231 through the air inlet 1232, and the mixed gas discharged from the first flow channel 1231 has a higher flow velocity, and if the mixed gas directly enters the air inlet cavity 1240, the mixed gas will encounter the blockage of the first area 1221 and be sprayed directly towards the local flame outlet 1211, so as to generate a larger pressure drop, which is unfavorable for the uniform flow of the air flow (fuel gas and air). Therefore, by setting the corner flow channel 1233, the flow speed direction of the first flow channel 1231 is changed by the corner flow channel 1233, and the flow speed of the air flow is reduced by the action of the corner flow channel 1233, so that the air flow is buffered, and the air flow is prevented from generating a larger pressure drop after entering the air inlet cavity 1240.

Optionally, in some embodiments of the present application, continuing with fig. 5 and 6, the corner flow passage 1233 is configured to interface with the second region 1222 such that the airflow exiting the corner flow passage 1233 is directed into the intake cavity 1240. Because the second area 1222 is designed to surround the first area 1221, the air inlet cavity 1240 is formed by the cooperation of the second area 1222 and the first area 1221 with the bottom plate 1210, and the corner runner 1233 is designed to be connected with the second area 1222, so that the position arrangement of the injection structure 1230 is more beneficial, and the occupation of the space of the air inlet cavity 1240 is avoided.

By providing the corner flow channel 1233, the speed of the air flow can be reduced, on this basis, in order to avoid excessively large obstruction to the air flow, in some embodiments of the present application, the corner flow channel 1233 has two opposite flow channel walls, namely the inner flow channel wall 1235 and the outer flow channel wall 1234, so-called inner and outer, which are the inner flow channel wall 1235 near the corner of the corner flow channel 1233 and the outer flow channel wall 1234 far from the corner of the corner flow channel 1233, the outer flow channel wall 1234 is designed to be arc-shaped, and most of the air flow (gas and air) will have one direction under the action of the first flow channel 1231 and collide with the outer flow channel wall 1234 to change direction when entering the corner flow channel 1233, so the outer flow channel wall 1234 is designed to be arc-shaped, which is not only beneficial to changing the air flow direction, but also reduces the resistance to the air flow and makes the air flow easier to be guided to the air intake cavity 1240.

Alternatively, to provide a more even distribution of airflow within the intake cavity 1240, as shown in connection with FIG. 7, the first region 1221 is oriented toward the outer flow path wall 1234 in an offset arrangement relative to the direction of the inner flow path wall 1235, i.e., the first region 1221 is oriented closer to the outer flow path wall 1234.

As shown in fig. 7, the outer flow path wall 1234 is disposed in the left direction, the inner flow path wall 1235 is disposed in the right direction, and the center of the first region 1221 in the left-right direction is disposed closer to the left direction in which the outer flow path wall 1234 is disposed. Thus, since the outer flow channel wall 1234 is arc-shaped, more air flows are emitted from the position close to the outer flow channel wall 1234, and the emitted air flows enter the air inlet cavity 1240 corresponding to the first region 1221, and since the first region 1221 protrudes into the design relative to the air inlet cavity 1240, that is, the height between the first region 1221 and the bottom plate 1210 is smaller than the height between the second region 1222 and the bottom plate 1210, when the air flows enter the air inlet cavity 1240 corresponding to the first region 1221, the air flows can be accelerated, so that the air flows can fill the air inlet cavity 1240 more quickly, the outflow uniformity of the fire outlet 1211 is improved, and uniform combustion is facilitated.

Alternatively, in general, the accommodating chamber 1110 is substantially rectangular, and in order to allow the upper burner 1200 to have a large area of coverage, the upper burner 1200 is also designed to be substantially rectangular matching the accommodating chamber 1110, based on which the outer contour of the first area 1221 and the outer contour of the second area 1222 are designed to be rounded rectangular, so that the top plate 1220 can be fully utilized. It should be understood that the length direction and the width direction are not represented by the size between the length direction and the width direction, and the length direction may be larger than the width direction, the length direction may be smaller than the width direction, or the length direction may be equal to the width direction. The corner flow passage 1233 is disposed on one side in the length direction and is communicated with the air inlet cavity 1240, the first area 1221 is designed to be non-centered with respect to the width direction of the second area 1222, that is, the first area 1221 is biased to one side in the width direction of the second area 1222, when the air flows out of the corner flow passage 1233 and enters the air inlet cavity 1240 corresponding to the first area 1221, the air flows can rotate clockwise or anticlockwise, so that the air flows are further uniformly distributed in the air inlet cavity 1240 by the clamping blocks, and stable combustion of the upper burner 1200 is more facilitated.

As shown in connection with fig. 8, in some embodiments of the present application, the top plate 1220 is further provided with a third area 1223, the third area 1223 surrounding the second area 1222, the third area 1223 and the bottom plate 1210 abutting and being connected to each other, such that the fixation of the top plate 1220 and the bottom plate 1210 is achieved. One of the bottom plates 1210 in the third area 1223 is provided with a flange 1225, and the other of the third area 1223 and the bottom plate 1210 is clamped by the aforementioned flange 1225, thus not only realizing the connection between the top plate 1220 and the bottom plate 1210, but also facilitating the sealing between the top plate 1220 and the bottom plate 1210, preventing leakage of the gas (gas, air) entering the intake cavity 1240.

For example, the edge of the top plate 1220 (the third region 1223) is bent to form a flange 1225, so that the periphery of the bottom plate 1210 can be clamped, which corresponds to the insertion of the periphery of the bottom plate 1210 into the space formed by the flange 1225 of the top plate 1220. When the upper burner 1200 is installed, the flange 1225 is pressed under the upper burner 1200. It can also be that the arrangement of the flange 1225 realizes the preliminary installation and positioning of the top plate 1220 and the bottom plate 1210, and the top plate 1220 (the third area 1223) and the bottom plate 1210 can be further fastened by adopting a screw connection mode, so that the top plate 1220 and the bottom plate 1210 are more convenient in screw connection due to the flange 1225.

A third aspect of the present application discloses an oven range 100, as shown in connection with fig. 1 and 2, the oven range 100 comprising the oven 1000 of the above-described embodiments. So-called oven range 100, i.e. an integrated kitchen appliance in which the oven 1000 and the range 2000 are integrated together, e.g. the range 2000 is located above the oven 1000 and the oven 1000 is located below the range 2000, when the oven 1000 uses gas for heating, correspondingly the range 2000 also uses gas for heating. It can be appreciated that the oven 1000 of the oven range 100 of the present embodiment adopts the technical solutions of the foregoing embodiments, so that the oven range at least has the beneficial effects brought by the technical solutions of the foregoing embodiments, and the detailed description thereof will not be repeated here.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the scope of the claims, and all equivalent structural changes made in the present application and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the present application.

Claims (11)

1. An upper burner, comprising:

a bottom plate provided with a fire hole; and

the top plate is overlapped with the bottom plate and is connected with the bottom plate, a first area and a second area surrounding the first area are arranged, the second area is arranged protruding relative to the outer surface of the top plate, the first area is arranged concavely relative to the outer surface of the second area, and an air inlet cavity communicated with the fire outlet hole is formed between the first area and the bottom plate and between the second area and the bottom plate.

2. The upper burner of claim 1, wherein the perimeter of the first region is provided with an annular wall that is disposed obliquely from the second region toward the center of the first region.

3. The upper burner of claim 1, wherein the first region and the second region are stamped.

4. The upper burner of claim 1, wherein the bottom plate and the top plate overlap to form an injection structure, the injection structure including a corner flow passage adapted to change the direction of air flow in communication with the air intake chamber.

5. The upper burner of claim 4 wherein said angled flow passage meets said second region.

6. The upper burner of claim 4 wherein the corner flow passage is provided with an outer flow passage wall and an inner flow passage wall, the outer flow passage wall being arcuate.

7. The upper burner of claim 6, wherein the first region is offset relative to the orientation of the inner flow path wall toward the orientation of the outer flow path wall.

8. The upper burner of claim 7, wherein the outer contours of the first region and the second region are rounded rectangles, the corner flow channels are provided on one side of the second region in the length direction, and the first region is not centered with respect to the second region in the width direction of the second region.

9. The upper burner of claim 1 wherein the top plate is further provided with a third region surrounding the second region, the third region being connected to the bottom plate, one of the third region and the bottom plate being provided with a flange to clamp the other.

10. An oven comprising an upper burner according to any one of claims 1 to 9.

11. An oven range characterized in that it comprises an oven as claimed in claim 10.