CN220229154U - Sheet metal fire cover, burner and gas cooker comprising same - Google Patents

Abstract

The utility model provides a sheet metal fire cover, a burner and a gas cooker comprising the same. Through this kind of setting, can the quick travel after the gas gets into the outer loop and holds the chamber to discharge from the burning fire hole department of fire lid body, in order to heat the pan on the fire lid body. Meanwhile, the depth of the combustion fire hole is increased by utilizing the phase change of the gas channel, so that when the gas in the outer ring accommodating cavity is discharged through the combustion fire hole, the moving path of the gas is increased, and the gas is prevented from possibly tempering when passing through the combustion fire hole when the thickness of the sheet metal fire cover is thinner, so that inconvenience in use or personal danger is caused for a user.

Description

Sheet metal fire cover, burner and gas cooker comprising same

Technical Field

The utility model relates to the technical field of gas cookers, in particular to a sheet metal fire cover, a burner and a gas cooker comprising the same.

Background

The gas cooker is an electrical appliance commonly used in a kitchen, the burner is used as a combustion part of the gas cooker, and the size of flame sprayed from the burner is an important factor for determining the use experience of a user. The burner is generally provided with a fire cover and a base, the fire cover generally comprises a top plate, an inner surrounding wall and a peripheral wall, so that the fire cover can cover the base and form a containing cavity together, fuel gas is sprayed out of a nozzle and then mixed with air to form flame, the flame enters the containing cavity through an injection pipe, and the cooker is heated through spraying out of a fire hole formed in the fire cover.

The existing fire cover is generally provided with an annular gap directly on the top plate, so that flames are ejected from the gap to form outer ring flames so as to heat the cooker on the fire cover. However, if the fire cover adopts a sheet metal structure, flame is ejected through the annular gap formed in the fire cover due to the fact that the sheet metal structure is relatively thin, and tempering risks are caused.

Disclosure of Invention

The utility model aims to overcome the defect that fire holes are formed in a sheet metal fire cover for flame injection in the prior art and tempering risk exists, and provides a sheet metal fire cover, a burner and a gas cooker comprising the sheet metal fire cover.

The utility model solves the technical problems by the following technical scheme:

the utility model provides a panel beating fire lid, is including the fire lid body, the fire lid body contains an outer loop and holds chamber and burning fire hole, its characteristics lie in:

the sheet metal fire cover further comprises a blocking part, the blocking part covers the fire cover body, the blocking part is arranged at intervals with the fire cover body and forms a gas channel communicated with the outside, an opening of the gas channel communicated with the outside is arranged upwards, and the gas channel is communicated with the outer ring accommodating cavity through the combustion fire hole.

In this scheme, after the outer loop of gas entering fire lid body holds the chamber, can hold the intracavity at the outer loop and hold fast moving to discharge from the burning fire hole department of fire lid body, in order to heat the pan on the fire lid body. Through covering on the fire lid body and separating the fender portion, utilize to separate the interval setting between fender portion and the fire lid body and form the gas passageway with external intercommunication, the gas passageway holds the chamber intercommunication through burning fire hole and outer loop, utilize the increase burning fire hole's that the gas passageway becomes looks degree of depth for the outer loop holds the intracavity gas when burning the fire hole discharge, increases the route that the gas moved, prevents when the thickness of panel beating fire lid is thinner, the gas can produce the tempering when burning the fire hole, causes inconvenient or the personal danger for the user.

Further, the combustion fire hole is formed in the top plate of the fire cover body, and the blocking part covers the top plate of the fire cover body and is arranged at intervals with the top plate of the fire cover body.

In this scheme, through this kind of setting for the structure of whole panel beating fire lid is more reasonable, also more makes things convenient for the opening of gas passageway and external intercommunication up simultaneously, and then the flame that the gas that sprays the department through the gas passageway formed more conveniently heats the pan.

Further, the top plate of the fire cover body is an inclined surface in the vertical direction, the inclined surface is inclined downwards from the top end of the peripheral wall of the fire cover body to the direction of the inner peripheral wall of the fire cover body, and the baffle part is consistent with the inclined direction of the top plate.

In this scheme, through this kind of setting for separate the portion of keeping off and roof can be parallel to each other, with the opening that makes gas passage and external intercommunication can be with certain inclination setting up, and then form outer loop flame to heat the pan.

Further, a plurality of protruding portions are arranged on the end face, close to the inclined face, of the baffle portion, and the baffle portion abuts against the inclined face through the protruding portions.

In this scheme, through this kind of setting, can utilize a plurality of bellying direct butt of separating the fender portion on the roof of fire lid body for form parallel clearance between the two, utilize this clearance direct as the gas passageway, structurally simpler, it is also more convenient in the manufacturing.

Further, the combustion fire hole is a plurality of sections of arc-shaped slits arranged along the circumferential direction of the fire cover body, the adjacent arc-shaped slits are arranged at intervals from head to tail on the inclined surface, and the positions of the protruding parts, which are abutted to the inclined surface, are respectively positioned at the intervals from head to tail of the adjacent arc-shaped slits.

In this scheme, through this kind of setting for on the inclined plane of roof, the position and the annular gap of bellying butt set up in turn, avoid setting up the place of bellying and also have the injection of gas, thereby improve the utilization ratio of gas.

Further, the baffle portion extends upward to the peripheral wall of the fire cover body in the inclined direction on the inclined surface.

In this scheme, through this kind of setting, the opening that gas passage and external intercommunication is located the top of the peripheral wall of fire lid body, and the gas is directly spouted through this gas passage, more is favorable to the formation of flame, and then improves the utilization ratio of gas.

Further, the baffle part extends downwards along the inclined direction on the inclined surface so as to jump over the inner surrounding wall of the fire cover body, a side surrounding wall is arranged at the extending end part, the side surrounding wall extends downwards along the vertical direction, and the baffle part, the side surrounding wall and the inner surrounding wall of the fire cover body jointly form a middle ring accommodating cavity.

In this scheme, through this kind of setting, form the outer loop between the peripheral wall of fire lid body and the interior wall and hold the chamber, reuse separates and forms the zhong holding chamber between the side wall that the portion tip extends and the interior wall of fire lid body to can set up the zhong fire hole on separating the portion, the gas can get into the zhong and hold the chamber with outer ring respectively, and then can form outer loop flame and zhong flame and heat the pan simultaneously, has further improved the utilization ratio of gas.

Further, the dimension of the inner peripheral wall of the fire cover body and the dimension of the outer peripheral wall of the fire cover body extending downwards along the vertical direction are smaller than the dimension of the side peripheral wall extending downwards along the vertical direction.

In this scheme, through this kind of setting, when the fire lid body coupling is on the base, the size setting of side enclosure wall can be utilized for when the side enclosure wall also butt is on the base, form certain clearance between baffle portion and the fire lid body, utilize this clearance as the gas passageway, structurally simpler, and avoided separating the contact between baffle portion and the fire lid body.

A burner, the burner comprising:

the base is provided with an injection pipe;

the sheet metal fire cover is matched with the base to seal the outer ring accommodating cavity and the middle ring accommodating cavity of the sheet metal fire cover, and the first end opening of the injection pipe is communicated with the outer ring accommodating cavity and the middle ring accommodating cavity;

the gas injection device comprises a supporting seat, wherein a gas nozzle is arranged on the supporting seat, the base is fixed on the supporting seat, and the opening at the second end of the injection pipe is right opposite to the gas nozzle.

In this scheme, through this kind of setting, after the gas nozzle on the supporting seat sprays the gas, in entering the injection pipe that sets up on the base, from the injection pipe discharge back entering panel beating fire lid the outer loop hold the chamber and in the well hold the chamber in, the rethread corresponds the fire hole discharge for the setting of whole combustor is more reasonable, and the gas is through the injection pipe direct entry fire lid hold the intracavity, has improved the utilization ratio of gas.

Further, the burner further comprises a flow homogenizing plate, the flow homogenizing plate is arranged at the top of the base, the sheet metal fire cover is mutually matched with the base through the flow homogenizing plate and forms an outer ring accommodating cavity and an intermediate ring accommodating cavity, and the flow homogenizing plate corresponds to the outer ring accommodating cavity and the intermediate ring accommodating cavity and is provided with annular through holes respectively.

In the scheme, through the arrangement, on one hand, when the sheet metal fire cover is connected with the base, the inner peripheral wall of the fire cover body or the side peripheral wall of the baffle part can be abutted on the uniform flow plate so as to seal the outer ring accommodating cavity and the middle ring accommodating cavity; on the other hand, the annular through holes on the uniform flow plate are respectively communicated with the middle ring accommodating cavity and the outer ring accommodating cavity, and fuel gas flows through the annular through holes at specific positions, so that uniformity of fuel gas outflow and fuel gas balance entering the outer ring accommodating cavity and the middle ring accommodating cavity are promoted.

A gas hob, characterized in that said gas hob comprises a burner as described above.

In this scheme, through using above-mentioned combustor on gas cooking utensils, can effectually solve the sheet metal fire and cover and set up the defect that the injection that burning fire hole was used for flame has the tempering risk in prior art.

The utility model has the positive progress effects that:

after the fuel gas enters the outer ring accommodating cavity of the fire cover body, the fuel gas can rapidly move in the outer ring accommodating cavity and is discharged from the combustion fire hole of the fire cover body so as to heat the cooker on the fire cover body. Through covering on the fire lid body and separating the fender portion, utilize to separate the interval setting between fender portion and the fire lid body and form the gas passageway with external intercommunication, the gas passageway holds the chamber intercommunication through burning fire hole and outer loop, utilize the increase burning fire hole's that the gas passageway becomes looks degree of depth for the outer loop holds the intracavity gas when burning the fire hole discharge, increases the route that the gas moved, prevents when the thickness of panel beating fire lid is thinner, the gas can produce the tempering when burning the fire hole, causes inconvenient or the personal danger for the user.

Drawings

FIG. 1 is a schematic view of the overall structure of a burner according to an embodiment of the present utility model.

Fig. 2 is a schematic structural diagram of a support base according to an embodiment of the utility model.

Fig. 3 is a schematic structural diagram of a base according to an embodiment of the utility model.

Fig. 4 is a schematic structural diagram of a base according to an embodiment of the utility model.

Fig. 5 is a schematic diagram illustrating an assembly structure of a support base, a base and a flow-homogenizing plate according to an embodiment of the utility model.

Fig. 6 is a schematic structural diagram of a sheet metal fire cover in an embodiment of the utility model.

Fig. 7 is a schematic structural view of a baffle portion according to an embodiment of the present utility model.

Fig. 8 is a schematic structural view of a fire cover body according to an embodiment of the utility model.

Fig. 9 is a schematic cross-sectional view of a sheet metal fire cover according to an embodiment of the utility model.

Fig. 10 is a partially enlarged schematic illustration (one) at a in fig. 9.

Fig. 11 is a partially enlarged schematic illustration (two) at a in fig. 9.

Reference numerals illustrate:

burner 10

Support base 100

Gas nozzle 110

Base 200

Injection pipe 210

Gas inlet 211

Gas outlet 212

Sheet metal fire cover 300

Top plate 310

Combustion fire hole 320

Peripheral wall 330

Inner peripheral wall 340

Side enclosure wall 350

Fire cover body 360

Outer ring receiving cavity 361

Baffle 370

Middle ring holding cavity 371

Protrusion 372

Gas channel 373

Middle ring fire hole 374

Flow homogenizing plate 400

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below are exemplary and intended to illustrate the present utility model and should not be construed as limiting the utility model, and all other embodiments, based on the embodiments of the present utility model, which may be obtained by persons of ordinary skill in the art without inventive effort, are within the scope of the present utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

As shown in fig. 1, the present embodiment provides a burner 10, and the burner 10 mainly includes three parts, namely a supporting seat 100, a base 200 and a sheet metal fire cover 300. As shown in fig. 2, the support base 100 may be placed inside a gas cooker, and three gas nozzles 110 are disposed on the top surface of the support base 100, wherein two gas nozzles 110 are located at the same peripheral edge of the support base 100, and the radial dimension of the other gas nozzle 110 on the support base 100 is larger, so that gas is ejected through the gas nozzles 110 and enters the inside of the base 200. The specific structure of the specific support base 100 is conventional, and will not be described herein.

Referring to fig. 3 and 4, the base 200 is fixed on the support base 100, two injection pipes 210 are disposed in the base 200, and the two injection pipes 210 respectively have a gas inlet 211 and a gas outlet 212, where the two gas inlets 211 are located at the bottom of the base 200 and face two gas nozzles 110 disposed on the support base 100 and in the same circumference, and the two gas outlets 212 are located at the top of the base 200, so that the gas sprayed from the gas nozzles 110 can enter the injection pipes 210 through the gas inlets 211, and then be discharged from the gas outlets 212 to enter the base 200.

As shown in fig. 6, 7 and 8, the sheet metal fire cover 300 is formed by matching a fire cover body 360 with a baffle portion 370, the fire cover body 360 comprises a peripheral wall 330, an inner wall 340 and a top plate 310 connected with the peripheral wall 330 and the inner wall 340, an outer ring containing cavity 361 forming the fire cover body 360 is surrounded by the inner wall 340, the peripheral wall 330 and the top plate 310, an annular combustion fire hole 320 is formed in the top plate 310, when the fire cover body 360 is connected to the base 200, the periphery of the fire cover body 360 is matched with the periphery of the base 200, the inner periphery of the fire cover body 360 extends towards the direction of the base 200, and the outer ring containing cavity 361 can be closed to the greatest extent by the base 200. In addition, the blocking part 370 is covered on the fire cover body 360, and a plurality of middle fire holes 374 are also provided on the blocking part 370 for the injection of fuel gas, and as shown in fig. 9 and 10, a fuel gas channel 373 communicating with the outside is formed between the blocking part 370 and the fire cover body 360 at intervals, the opening of the fuel gas channel 373 communicating with the outside is upwardly arranged, and the fuel gas channel 373 communicates with the outer ring accommodating cavity 361 through the combustion fire holes 320.

Through this kind of setting, after the gas got into the outer loop of fire lid body 360 and held the chamber 361, can hold the intracavity at the outer loop and hold the chamber 361 fast to discharge from the burning fire hole 320 department of fire lid body 360, in order to heat the pan on the fire lid body 360. Through covering the baffle portion 370 on the fire cover body 360, utilize the interval setting between baffle portion 370 and the fire cover body 360 to form the gas passageway 373 with external intercommunication, the gas passageway 373 is through burning fire hole 320 and outer ring holding chamber 361 intercommunication, utilize the depth of the increase burning fire hole 320 that gas passageway 373 becomes looks, combine the FIG. 11 to show, arrow B direction is the direction that the gas was outwards sprayed through gas passageway 373 promptly, when the gas in the outer ring holding chamber 361 was discharged through burning fire hole 320, utilize gas passageway 373 to increase the route that the gas removed, prevent when the thickness of panel beating fire cover 300 is thinner, the gas can produce the tempering when burning fire hole 320, cause inconvenient or the personal danger for the user.

As shown in fig. 8, 9 and 10, in the present embodiment, the combustion fire hole 320 is provided on the top plate 310 of the fire cover body 360, and the barrier 370 is also provided to cover the top plate 310 of the fire cover body 360 and to be spaced apart from the top plate 310 of the fire cover body 360. Through this kind of setting for the structure of whole panel beating fire lid 300 is more reasonable, also more makes things convenient for the opening of gas passageway 373 and external intercommunication up simultaneously, and then the flame that the gas that sprays the department through gas passageway 373 formed more conveniently heats the pan. On this basis, the top plate 310 of the fire cover body 360 is an inclined surface in the vertical direction, the inclined surface is inclined downwards from the top end of the peripheral wall 330 of the fire cover body 360 to the direction of the inner peripheral wall 340 of the fire cover body 360, and the inclined direction of the baffle portion 370 is consistent with that of the top plate 310.

However, in other embodiments, the combustion fire hole 320 may not be provided on the top plate 310 of the fire cover body 360, for example, may be provided on the outer wall 330 of the fire cover body 360, and the blocking portion 370 may be disposed around the outer side of the outer wall 330 of the fire cover body 360, so that when the fuel gas is ejected from the combustion fire hole 320 of the outer wall 330, the depth of the combustion fire hole 320 may be increased by changing the gap formed between the blocking portion 370 and the fire cover body 360, so as to avoid the occurrence of tempering. Similarly, the peripheral wall 330 of the fire cover body 360 may be inclined in the vertical direction, and the blocking portion 370 is consistent with the inclination direction of the peripheral wall 330, and the detailed deformation design will not be described herein.

Further, as shown in fig. 7 and 8, the barrier portion 370 is provided with four protrusions 372 on an end face close to the inclined surface, and the spacing included angles between the adjacent protrusions 372 on the barrier portion 370 are each 90 degrees, and the barrier portion 370 abuts on the inclined surface through these protrusions 372. With this arrangement, the protrusions 372 of the baffle 370 can be directly abutted against the top plate 310 of the fire cover body 360, so that a parallel gap is formed between the two, and the gap is directly used as the fuel gas channel 373, so that the structure is simpler, and the processing and manufacturing are more convenient.

In order to achieve the matching of the positions between the protruding portions 372 and the combustion fire holes 320, in this embodiment, the combustion fire holes 320 are four arc-shaped slits arranged along the circumferential direction of the fire cover body 360, and adjacent arc-shaped slits are arranged at intervals on the inclined surface in the head-tail direction, so that four connection positions are formed between the four annular slits, the positions of the four protruding portions 372 abutted on the inclined surface are located at the four connection positions respectively, and finally the positions of the protruding portions 372 abutted on the inclined surface are located at the head-tail intervals of the adjacent arc-shaped slits respectively. By this arrangement, the position where the protruding portion 372 abuts and the annular gap are alternately arranged on the inclined surface of the top plate 310, so that the gas injection is avoided at the place where the protruding portion 372 is arranged, and the gas utilization rate is improved.

As shown in fig. 9 and 10, the barrier 370 is covered on the top plate 310 of the fire cover body 360, and the barrier 370 extends upward in an inclined direction of the top plate 310 to the peripheral wall 330 of the fire cover body 360. Through this kind of setting, the opening that gas passageway 373 and external intercommunication is located the top of the peripheral wall 330 of fire lid body 360, and the gas is directly spouted through this gas passageway 373, more is favorable to the formation of flame, and then improves the utilization ratio of gas.

In addition, the barrier 370 extends downward in the inclined direction of the top plate 310 to jump over the inner circumferential wall 340 of the fire cover body 360, and is provided with side circumferential walls 350 at extended ends, the side circumferential walls 350 extend downward in the vertical direction, and the barrier 370, the side circumferential walls 350 and the inner circumferential wall 340 of the fire cover body 360 together form a middle ring receiving chamber 371. Through this kind of setting, form the outer loop between the peripheral wall 330 of fire lid body 360 and the interior wall 340 and hold the chamber 361, reuse separates the side wall 350 that the portion of keeping off 370 extends and forms the middle ring between the interior wall 340 of fire lid body 360 and hold the chamber 371, and can set up the middle ring fire hole 374 on separating the portion 370, after whole panel beating fire lid 300 is connected on base 200, the gas can get into respectively and hold the chamber 371 and hold the chamber 361 with the outer loop, and then can form outer ring firework and middle ring flame and heat the pan simultaneously, further improved the utilization ratio of gas.

When the side enclosing wall 350 is provided on the barrier portion 370, the dimension of the side enclosing wall 350 extending toward the base 200 may be adjusted to form a gas channel 373 between the barrier portion 370 and the fire cover body 360, for example, the dimension of the inner enclosing wall 340 of the fire cover body 360 and the dimension of the outer enclosing wall 330 of the fire cover body 360 extending downward in the vertical direction are smaller than the dimension of the side enclosing wall 350 extending downward in the vertical direction, and when the fire cover body 360 is connected to the base 200, the side enclosing wall 350 is also abutted to the base 200, a certain gap is formed between the barrier portion 370 and the fire cover body 360, and the gap is utilized as the gas channel 373, so that the structure is simpler, and the contact between the barrier portion 370 and the fire cover body 360 is avoided.

As shown above, the burner 10 in this embodiment includes the supporting seat 100, the base 200 and the sheet metal fire cover 300, where the sheet metal fire cover 300 is the sheet metal fire cover 300 as described above, the sheet metal fire cover 300 and the base 200 can cooperate with each other to close the outer ring accommodating cavity 361 and the middle ring accommodating cavity 371 of the sheet metal fire cover 300, the gas inlet 211 of the injection pipe 210 is disposed towards the gas nozzle 110 of the supporting seat 100, and the gas outlet 212 of the injection pipe 210 is communicated with the outer ring accommodating cavity 361 and the middle ring accommodating cavity 371. This kind of setting makes the structural layout of whole combustor 10 more reasonable, and the gas is through penetrating pipe 210 direct entering panel beating fire lid 300's outer loop holds the intracavity 361 and in the zhonghuan holds the chamber 371, has improved the utilization ratio of gas.

Further, as shown in fig. 5, the burner 10 further includes a flow homogenizing plate 400, the flow homogenizing plate 400 is disposed at the top of the base 200, the sheet metal fire cover 300 is matched with the base 200 through the flow homogenizing plate 400 to form an outer ring accommodating cavity 361 and an intermediate ring accommodating cavity 371, and annular through holes are respectively formed in the flow homogenizing plate 400 corresponding to the outer ring accommodating cavity 361 and the intermediate ring accommodating cavity 371. With this arrangement, on the one hand, when the sheet metal fire cover 300 is connected to the base 200, the inner peripheral wall 340 of the fire cover body 360 or the side peripheral wall 350 of the barrier 370 can abut against the uniform flow plate 400 to close the outer ring accommodation chamber 361 and the middle ring accommodation chamber 371; on the other hand, the annular through holes on the uniform flow plate 400 are respectively communicated with the middle ring accommodating cavity 371 and the outer ring accommodating cavity 361, and the fuel gas flows through the annular through holes at specific positions, so that the uniformity of fuel gas outflow and the balance of fuel gas entering the outer ring accommodating cavity 361 and the middle ring accommodating cavity 371 are promoted. In the present embodiment, when the peripheral wall 330 of the fire cover body 360 and the side wall 350 of the barrier 370 are respectively abutted against the flow homogenizing plate 400, the inner wall 340 of the fire cover body 360 is not abutted against the flow homogenizing plate 400, that is, a certain gap is still present between the outer ring accommodating chamber 361 and the middle ring accommodating chamber 371, but this case does not affect the flow and injection of the fuel gas.

In addition, the embodiment also discloses a gas cooker, which comprises the burner 10, so that the defect that the fire hole 320 for flame injection has tempering risk in the prior art can be effectively overcome.

While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the utility model is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the utility model, but such changes and modifications fall within the scope of the utility model.

Claims (11)

1. The utility model provides a panel beating fire lid, is including the fire lid body, the fire lid body contains an outer loop and holds chamber and burning fire hole, its characterized in that:

the sheet metal fire cover further comprises a blocking part, the blocking part covers the fire cover body, the blocking part is arranged at intervals with the fire cover body and forms a gas channel communicated with the outside, an opening of the gas channel communicated with the outside is arranged upwards, and the gas channel is communicated with the outer ring accommodating cavity through the combustion fire hole.

2. The sheet metal fire cover of claim 1, wherein the combustion fire hole is formed in a top plate of the fire cover body, and the barrier portion is covered on the top plate of the fire cover body and is spaced from the top plate of the fire cover body.

3. The sheet metal fire cover according to claim 2, wherein the top plate of the fire cover body is an inclined surface in the vertical direction, the inclined surface is inclined downward from the top end of the peripheral wall of the fire cover body to the direction of the inner peripheral wall of the fire cover body, and the baffle portion is in accordance with the inclined direction of the top plate.

4. The sheet metal fire cover according to claim 3, wherein a plurality of protruding portions are provided on an end surface of the blocking portion adjacent to the inclined surface, and the blocking portion abuts against the inclined surface through the protruding portions.

5. The sheet metal fire cover of claim 4, wherein the combustion fire holes are multi-segment arc-shaped slits arranged along the circumferential direction of the fire cover body, adjacent arc-shaped slits are arranged at intervals from head to tail on the inclined surface, and the positions of the protruding parts abutted on the inclined surface are respectively positioned at intervals from head to tail of the adjacent arc-shaped slits.

6. A sheet metal fire cover as claimed in claim 3 wherein the barrier extends upwardly in an oblique direction on the inclined face to the peripheral wall of the fire cover body.

7. A sheet metal fire cover as claimed in claim 3 wherein the barrier extends downwardly in an inclined direction on the inclined face to clear the inner perimeter wall of the fire cover body and is provided with side perimeter walls at the extended ends, the side perimeter walls extending downwardly in a vertical direction, the barrier, side perimeter walls and inner perimeter wall of the fire cover body together forming a middle ring receiving cavity.

8. The sheet metal fire cover of claim 7, wherein the inner perimeter wall of the fire cover body and the outer perimeter wall of the fire cover body each have a dimension extending downward in a vertical direction that is less than the dimension of the side perimeter wall extending downward in a vertical direction.

9. A burner, the burner comprising:

the base is provided with an injection pipe;

the sheet metal fire cover of any one of claims 7-8, the sheet metal fire cover and the base cooperating with each other to close an outer ring receiving cavity and a middle ring receiving cavity of the sheet metal fire cover, a first end opening of the ejector tube communicating the outer ring receiving cavity and the middle ring receiving cavity;

the gas injection device comprises a supporting seat, wherein a gas nozzle is arranged on the supporting seat, the base is fixed on the supporting seat, and the opening at the second end of the injection pipe is right opposite to the gas nozzle.

10. The burner of claim 9, further comprising a flow homogenizing plate disposed on top of the base, wherein the sheet metal fire cover is mutually matched with the base through the flow homogenizing plate and forms the outer ring accommodating cavity and the middle ring accommodating cavity, and the flow homogenizing plate is provided with annular through holes corresponding to the outer ring accommodating cavity and the middle ring accommodating cavity respectively.

11. A gas hob, characterized in, that the gas hob comprises a burner according to any one of the claims 9-10.