CN214172229U - A kind of burner - Google Patents

Abstract

The application discloses a combustor, which comprises a furnace end, a central fire cover and an outer ring fire cover, wherein the furnace end comprises a first annular cavity with an upper opening and a second annular cavity with an upper opening; the central fire cover covers the upper opening of the first annular cavity to form a central annular gas channel, and a plurality of central fire cover gas outlets communicated with the central annular gas channel are formed in the central fire cover; the outer ring fire cover covers the opening at the upper part of the second annular cavity and forms an outer side annular gas channel, and a first gas supplementing channel is arranged at the center of the first annular cavity to provide sufficient combustion-supporting gas for a central combustion area. The utility model discloses a combustor has advantages such as combustion efficiency is high, heating efficiency is high and hot flue gas utilization ratio is high.

Description

A kind of burner

Technical Field

The utility model belongs to the technical field of kitchen appliance, especially, relate to a combustor.

Background

The burner is a kitchen utensil which uses fuel gas such as liquefied petroleum gas, artificial gas, natural gas and the like as fuel and can be directly heated, has the advantages of cleanness, sanitation and low use cost, and is popular with consumers. However, since the gas, combustion, heating, etc. have certain particularity, taking gas as an example, if the burner is not designed properly, the gas may be burnt insufficiently, and the unburnt gas is inhaled into human body to cause fatal injury to human body, the burner should be designed to burn the gas as well as possible. In addition, because the function of the combustor is to heat the pan in order to realize the culinary art to food, so improve the combustion efficiency of fuel, the hot flue gas utilization ratio that fuel burning produced is the prerequisite that improves cooking efficiency, consequently, the design of combustor science, reasonable has vital meaning.

In order to meet the requirements for duration and degree of heating in the cooking process, the existing burner usually comprises a central combustion area and an outer ring combustion area, when high-temperature heating is needed to be concentrated rapidly, the central combustion area and the outer ring combustion area are both in a gas combustion state, under the condition, because some existing burners are unreasonable in design, gas in the central combustion area is difficult to realize full combustion, and part of gas can only be combusted near the outer ring combustion area, so that the contact time of hot flue gas generated by gas combustion and the bottom of a pot is shortened seriously, a large amount of heat is escaped, and meanwhile, the temperature of the cooking environment rises suddenly, and discomfort is brought to cookers; when needs slow fire culinary art or local heating, often only central combustion area is in the combustion state, because some current combustors design is unreasonable, receive the restriction of outer loop combustion area, lead to can not providing sufficient combustion-supporting gas for central combustion area, also shortened the contact time of the produced hot flue gas of gas burning and bottom of a boiler local heating region to a certain extent, also can lead to a large amount of heat to take place relative escape and can not be fine realization local heating, and then reduced the utilization ratio of the hot flue gas that gas burning produced, influence heating efficiency then. In order to improve the combustion efficiency of the gas, some existing burners are also provided with an oxygen enrichment device, which substantially increases the production cost and the structural complexity of the burner.

Therefore, the applicant provides a novel burner with high combustion efficiency, high heating efficiency and high utilization rate of hot flue gas aiming at the problems of the existing burner.

The above description is included in the technical recognition scope of the inventors, and does not necessarily constitute the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model provides a combustor to solve at least one technical problem among the above-mentioned technical problem.

The utility model discloses the technical scheme who adopts does:

a burner, comprising:

the furnace end comprises a first annular cavity which is surrounded by annular bulges and provided with an upper opening, and a second annular cavity which is surrounded by the annular bulges and provided with an upper opening;

the central fire cover covers the upper opening of the first annular cavity to form a central annular gas channel, a plurality of central fire cover gas outlets communicated with the central annular gas channel are formed in the central fire cover, and gas can be combusted at the central fire cover gas outlets to form a central combustion area;

the outer ring fire cover covers the upper opening of the second annular cavity to form an outer ring gas channel, a plurality of outer ring fire cover gas outlets communicated with the outer ring gas channel are formed in the outer ring fire cover, and gas can be combusted at the outer ring fire cover gas outlets to form an outer ring combustion area;

and a first air supplementing channel is arranged at the center of the first annular cavity to provide sufficient combustion-supporting gas for the central combustion area.

And a second air supply channel is further selectively arranged between the first annular cavity and the second annular cavity of the furnace end so as to provide sufficient combustion-supporting gas for a combustion area.

And the second air supply channel is further selectively arranged between the first annular cavity and the second annular cavity in a surrounding manner, and is communicated with the outside atmosphere, the central combustion area and the outer ring combustion area so as to provide sufficient air for the central combustion area and/or the outer ring combustion area.

And the second air supply channel is further selectively provided with an annular flow distribution structure body capable of uniformly distributing air in the circumferential direction of the second air supply channel, and the annular flow distribution structure body is provided with a plurality of flow distribution holes in the circumferential direction.

The central fire cover is further selectively set to be of an annular structure, the upper surface of the central fire cover is an inwards concave annular surface, and the central fire cover gas outlets are circumferentially distributed and annularly arranged on the inwards concave annular surface.

The central fire cover gas outlet is of a radially arranged strip-shaped structure selectively, the central fire cover gas outlet is circumferentially and uniformly distributed on the concave annular surface, the central fire cover gas outlet is of an inner groove type structure, and the central fire cover gas outlet faces to the adjacent inner groove type structure arranged in the same circumferential direction.

And the outer ring fire cover is further selectively set into an annular structure with a roof ridge-shaped cross section formed by a first annular part and a second annular part, a plurality of flow guide caps which are convexly arranged and circumferentially distributed are respectively arranged on the upper surface of the first annular part and the upper surface of the second annular part, and the gas outlets of the outer ring fire cover face to the adjacent flow guide caps which are circumferentially arranged.

And the diversion cap is further selectively made into a strip-shaped structure which is arranged in the radial direction, the first annular part and the second annular part are uniformly distributed in the circumferential direction, and a guide structure is formed on the other side of the strip-shaped structure, which is opposite to the gas outlet of the outer ring fire cover, so that the gas is guided to the gas outlet of the outer ring fire cover.

Further selectively disposing the bleed cap on the first annular portion non-collinear with the bleed cap on the second annular portion in a radial direction.

The combustor further selectively enables the combustor to further comprise an ignition device and an flameout protection device, an ignition hole is formed in the side wall of the central fire cover, an installation position of the flameout protection device and an installation position of the ignition device are further arranged on the furnace head between the first annular accommodating cavity and the second annular accommodating cavity, the installation position of the ignition device is arranged on one side of the ignition hole, the ignition device is fixedly arranged on the installation position of the ignition device, and the flameout protection device is fixedly arranged on the installation position of the flameout protection device.

In the present application, those skilled in the art are motivated to arrange necessary components, units or systems where necessary, according to the well-known art in the relevant field.

The combustor provided by the application can bring the following beneficial effects:

1. this application is through making first annular hold the chamber with central fire lid cooperation forms central annular gas passageway, and makes central burning zone territory is established to the loop configuration to can increase in limited space the regional combustion area of central burning can increase the excessive fire area of pot body bottom effectively. Secondly, this application is through the first tonifying qi passageway that central combustion area set up, and then can set up to the annular central combustion area provides sufficient combustion-supporting gas, makes the gas can be in central combustion area abundant burning, increases the hot flue gas that the gas produced and the contact time of bottom of a boiler simultaneously, and then improves heating efficiency. Sufficient combustion-supporting gas can be supplied to the central combustion region even when the central combustion region and the outer ring combustion region are simultaneously combusted.

2. This application is through first annular hold the chamber with second annular holds and sets up second tonifying qi passageway between the chamber, second tonifying qi passageway can be right central burning zone or outer loop burning zone provide sufficient combustion-supporting gas, especially only during the operating mode of central burning zone emergence burning, first tonifying qi passageway with second tonifying qi passageway can be right simultaneously central burning zone provides sufficient combustion-supporting gas, and then makes the gas can the intensive combustion, and this also provides powerful technical guarantee for increasing central burning zone's combustion area. Meanwhile, the fuel gas can be fully combusted in the central combustion area, and further the combustion efficiency, the heat utilization rate and the local heating capacity of the fuel are improved.

3. This application is through setting up first annular holds the chamber with the second annular holds the chamber, and external atmosphere can be to two the combustion area provides sufficient combustion-supporting gas, does not need extra oxygen boosting device that sets up just can make the gas fully burn in the combustion area of settlement.

4. This application is through set up the annular structure of joining in marriage on the second tonifying qi passageway, and then make external atmosphere can the annular structure of joining in marriage provides even combustion-supporting gas to the combustor that the annular set up under the effect of flowing.

5. This application is through making center fire lid is established to indent annular structure and not only can be in the burning route of the gas of littleer space increase, makes this regional gas can have sufficient burning route in the region of setting for, and then increases the hot flue gas that the gas burning produced and the contact time of bottom of a boiler, further improves the heating time, combustion efficiency and the heating efficiency of this department gas. Besides, this application is through making central fire lid gas outlet sets up interior recess type structure and makes central fire lid gas outlet is towards the same adjacent of circumference arrangement interior recess type structure also can reach the purpose that improves the heating time, the combustion efficiency and the heating efficiency of this department gas.

6. This application is through making outer loop fire lid establishes to the ridge structure that constitutes by first annular portion and second annular portion, and in first annular portion with set up a plurality of drainage caps in the second annular portion respectively, at specific during operation, the second tonifying qi passageway can provide sufficient combustion-supporting gas to the gas that sets up the drainage cap derivation in the annular portion in the inboard, and a plurality of drainage cap exhaust gas that the annular in the outside set up can provide combustion-supporting gas by external atmosphere, can make the gas can fully burn in outer ring combustion area region effectively like this.

7. This application passes through the effect of drainage cap can make the gas play the effect of water conservancy diversion and buffering under the effect of drainage cap, not only makes the gas be in more even that distributes in the outside annular gas passageway makes the gas can the side direction derive moreover, also can increase the burning route of gas simultaneously effectively, and then makes fuel can fully burn, improves the heating efficiency and the heat utilization rate of combustor then.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is an exploded view of a burner according to an embodiment of the present disclosure;

fig. 2 is an exploded view of a burner according to an embodiment of the present disclosure;

FIG. 3 is a front view of a combustor provided by an embodiment of the present application;

FIG. 4 is a sectional view taken along line A-A of FIG. 3;

FIG. 5 is an enlarged view of portion A of FIG. 4;

fig. 6 is a structural view of the annular flow distribution structure provided in the embodiment of the present application;

FIG. 7 is a side view of a combustor provided by an embodiment of the present application;

FIG. 8 is an enlarged view of a portion of the structure of FIG. 7 at B;

fig. 9 is a schematic structural view of a gas range including the burner.

Wherein the content of the first and second substances,

1 furnace end, 11 first annular cavity, 12 second annular cavity, 13 first air supply channel, 14 second air supply channel,

2 central fire cover, 21 central fire cover gas outlet, 22 concave annular surface, 23 inner groove type structure, 24 ignition hole,

3 outer ring fire cover, 31 outer ring fire cover gas outlet, 32 first ring part, 33 second ring part, 34 diversion cap, 341 guide structure,

4 a central annular gas channel is arranged on the gas pipe,

5 an annular gas channel at the outer side,

6 a first air supply channel is arranged on the air supply channel,

7 a second air supply channel is arranged on the lower portion of the air supply channel,

8 annular flow distribution structures, 81 flow distribution holes, 82 handle structures,

9 an ignition device is arranged on the base plate,

10 a flameout protection device;

100 gas range, 101 burner and 102 pot frame.

Detailed Description

In order to more clearly explain the overall concept of the present application, the following detailed description is given by way of example in conjunction with the accompanying drawings.

In the description of the present application, it is to be understood that the terms "central," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. In the description herein, references to the description of the terms "an aspect," "some aspects," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the aspect or example is included in at least one aspect or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same solution or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more aspects or examples.

For convenience of description, the terms "front", "rear", "left", "right", "up" and "down" will be used with respect to the user when the burner is in use.

As shown in fig. 1 to 8, a burner includes: the burner comprises a burner 1, a central fire cover 2 and an outer ring fire cover 3, wherein the burner 1 comprises a first annular cavity 11 which is surrounded by annular bulges and is provided with an upper opening, and a second annular cavity 12 which is surrounded by the annular bulges and is provided with an upper opening; the first annular cavity 11 comprises an inner annular peripheral wall, an outer annular peripheral wall and an annular plate blocked at the same end of the inner annular peripheral wall and the outer annular peripheral wall, a hollow cavity on the inner side of the inner annular peripheral wall forms the first air supply channel 6, and an air supply notch matched with the first air supply channel 6 is arranged in the center of the central fire cover 2; the central fire cover 2 covers the upper opening of the first annular cavity 11 to form a central annular gas channel 4, a plurality of central fire cover gas outlets 21 communicated with the central annular gas channel 4 are formed in the central fire cover 2, and gas can be combusted at the central fire cover gas outlets 21 to form a central combustion area; the outer ring fire cover 3 covers the upper opening of the second annular cavity 12 and forms an outer ring gas channel 5, a plurality of outer ring fire cover gas outlets 31 communicated with the outer ring gas channel 5 are formed in the outer ring fire cover 3, and gas can be combusted at the outer ring fire cover gas outlets 31 to form an outer ring combustion area; a first gas supplementing channel 6 is arranged at the center of the first annular cavity 11 to provide sufficient combustion-supporting gas for the central combustion area. It should be pointed out that this application the combustor can also optionally include first air feed passageway 13 and second air feed passageway 14 when the concrete implementation, as shown in fig. 1 and fig. 2, first air feed passageway 13 with center annular gas passageway 4 intercommunication sets up with right center annular gas passageway 4 provides the gas, second air feed passageway 14 with outside annular gas passageway 5 intercommunication sets up with right outside annular gas passageway 5 provides the gas.

In specific implementation of the invention, as shown in fig. 2 to 4, the burner further includes an ignition device 9 and a flameout protection device 10, and an ignition hole 24 may be further selectively formed on the sidewall of the central fire cover 2, a flameout protection device mounting position and an ignition device mounting position are further formed on the burner 1 between the first annular cavity 11 and the second annular cavity 12, the ignition device mounting position is disposed on one side of the ignition hole 24, the ignition device 9 is fixedly disposed on the ignition device mounting position, and the flameout protection device 10 is fixedly disposed on the flameout protection device mounting position. When the cooker needs to be heated, the ignition device 9 ignites the gas exhausted from the central annular gas channel 4 from the ignition hole 24 to realize an ignition process.

This application is through making first annular hold chamber 11 with central fire lid 2 cooperation forms central annular gas passageway 4, and makes central burning zone territory is established to the loop configuration to can increase in limited space the regional combustion area of central burning can increase the area of crossing fire of pot body bottom effectively. Secondly, this application is through the first tonifying qi passageway 6 that the central combustion area set up, and then can set up to the annular the central combustion area provides sufficient combustion-supporting gas, makes the gas can be in the regional abundant burning of central combustion, increases the hot flue gas that the gas produced and the contact time of pot bottom simultaneously, and then improves heating efficiency. Sufficient combustion-supporting gas can be supplied to the central combustion region even when the central combustion region and the outer ring combustion region are simultaneously combusted.

As a preferred embodiment of the present application, as shown in fig. 1 and 4, it is further optional to provide said burner head 1 with a second aeration channel 7 between said first annular volume 11 and said second annular volume 12 to provide sufficient combustion-supporting gas to the combustion zone. This application is through first annular chamber 11 with second annular chamber 12 between set up second tonifying qi passageway 7, second tonifying qi passageway 7 can be right central combustion area or outer loop combustion area provide sufficient combustion-supporting gas, especially only during the operating mode of central combustion area emergence burning, first tonifying qi passageway 6 with second tonifying qi passageway 7 can be right simultaneously central combustion area provides sufficient combustion-supporting gas, and then makes the gas can the intensive combustion, and this combustion area for increasing central combustion area also provides powerful technical guarantee. Meanwhile, the fuel gas can be fully combusted in the central combustion area, and further the combustion efficiency, the heat utilization rate and the local heating capacity of the fuel are improved.

As a preferred embodiment of this embodiment, in practical implementation, the second air supply channel 7 is further selectively disposed between the first annular cavity 11 and the second annular cavity 12 in a surrounding manner, and the second air supply channel 7 communicates with the outside atmosphere and the central combustion area and the outer ring combustion area, so as to provide sufficient air for the central combustion area and/or the outer ring combustion area. This application is through setting up first annular holds chamber 11 with second annular holds chamber 12, and external atmosphere can be to two the combustion area provides sufficient combustion-supporting gas, does not need extra oxygen boosting device that sets up just can make the gas fully burn in the combustion area of settlement.

As a preferred example in the present embodiment, as shown in fig. 3 and 6, an annular flow distribution structure 8 capable of uniformly distributing air in the circumferential direction of the second air supply passage 7 is further optionally provided on the second air supply passage 7, and the annular flow distribution structure 8 is provided with a plurality of flow distribution holes 81 in the circumferential direction. In specific implementation, the annular flow distributing structure 8 may be an annular sheet or plate structure, and may be a stainless steel annular structure. To facilitate cleaning of the burner, a handle structure 82 may further optionally be provided on the annular flow distributing structure 8. This application is through set up annular on the second tonifying qi passageway 7 and join in marriage a class structure 8, and then make external atmosphere can be in annular is joined in marriage and is flowed structure 8's effect down and provide even combustion-supporting gas to the combustor that the annular set up. In addition, the annular flow distribution structure can also play a role of decoration, so that the combustor achieves a better aesthetic effect.

As a preferred embodiment of the present application, as shown in fig. 1, 4 and 5, the central fire cover 2 is further selectively provided with an annular structure, the upper surface of the central fire cover 2 is an inner concave annular surface 22, and a plurality of the central fire cover gas outlets 21 are circumferentially distributed and annularly arranged on the inner concave annular surface 22. This application is through making central fire lid 2 sets up to indent annular structure not only can increase the burning route of gas in littleer space, makes this regional gas can have sufficient combustion time in the region of setting for, and then increases the hot flue gas that the gas burning produced and the contact time of bottom of a boiler, and then improves the heating time, combustion efficiency and the heating efficiency of this department gas.

As a preferred example of this embodiment, as shown in fig. 5, the central burner cap gas outlet 21 is further selectively made to be a radially arranged strip-shaped structure, a plurality of the central burner cap gas outlets 21 are circumferentially and uniformly distributed on the concave annular surface 22, an inner groove-shaped structure 23 is provided at the central burner cap gas outlet 21, and the central burner cap gas outlets 21 face the adjacent inner groove-shaped structures 23 arranged in the same circumferential direction. Besides, the central fire cover gas outlet 21 is provided with the inner groove-shaped structure 23, and the central fire cover gas outlet 21 faces the adjacent inner groove-shaped structures 23 arranged in the same circumferential direction, so that the purposes of prolonging the combustion path, adjusting the gas flow rate and improving the heating time, the combustion efficiency and the heating efficiency of the gas at the position can be achieved.

As a preferred embodiment of the present application, as shown in fig. 1, 4 and 5, the outer fire cover 3 is further selectively provided with a ring structure with a roof-shaped cross section formed by a first ring portion 32 and a second ring portion 33, a plurality of circumferentially distributed flow guide caps 34 are respectively provided on the upper surface of the first ring portion 32 and the upper surface of the second ring portion 33, and the outer fire cover gas outlets 31 face the adjacent flow guide caps 34 arranged in the same circumferential direction. This application is through making outer ring fire lid 3 establishes to the ridge structure that comprises first annular portion 32 and second annular portion 33, and on first annular portion 32 with set up a plurality of drainage caps 34 on the second annular portion 33 respectively, and at specific during operation, second tonifying qi passageway 7 can provide sufficient combustion-supporting gas to the gas that drainage caps 34 on the annular portion of setting in the inboard derive, and the gas that a plurality of drainage caps 34 of the annular setting in the outside discharged can provide combustion-supporting gas by external atmosphere, can make the gas can fully burn in outer ring burning area region effectively like this.

As a preferred example of this embodiment, as shown in fig. 3 and 5, the diversion cap 34 is further selectively made to be a bar-shaped structure disposed radially and uniformly distributed in the circumferential direction of the first annular portion 32 and the second annular portion 33, and a guiding structure 341 is formed on the other side of the bar-shaped structure opposite to the outer burner cap gas outlet 31 to guide the gas to the outer burner cap gas outlet 31. This application passes through the effect of drainage cap 34 can make the gas play the effect of water conservancy diversion and buffering under the effect of drainage cap 34, not only makes the gas be in more even that distributes in the outside annular gas passageway 5 makes the gas can the side direction derive moreover, also can increase the combustion time and the extension burning route in the settlement region of gas simultaneously effectively, and then makes the fuel can fully burn, improves the heating efficiency and the heat utilization ratio of combustor then. In particular implementation, the drainage cap 34 on the first annular portion 32 and the drainage cap 34 on the second annular portion 33 are further selectively disposed non-collinear in the radial direction. In this way, the external atmosphere can be further enabled to provide combustion-supporting gas to the combustion gas discharged from the first annular portion 32 from the outside of the second annular portion 33 to some extent.

The application also discloses a gas stove 100 with the burners as shown in fig. 9, the gas stove 100 comprises two burners 101, two burners 101 are arranged on the stove body of the gas stove 100, and each burner 101 is provided with a pot frame 102.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims (10)

1. A burner, comprising:

the furnace end comprises a first annular cavity and a second annular cavity, wherein the first annular cavity and the second annular cavity are provided with upper openings and are in an annular convex shape;

the central fire cover covers the upper opening of the first annular cavity to form a central annular gas channel, a plurality of central fire cover gas outlets communicated with the central annular gas channel are formed in the central fire cover, and gas can be combusted at the central fire cover gas outlets to form a central combustion area;

and a first air supplementing channel is arranged at the center of the first annular cavity to provide sufficient combustion-supporting gas for the central combustion area.

2. The burner of claim 1,

and a second air supply channel is arranged between the first annular cavity and the second annular cavity of the furnace end so as to provide sufficient combustion-supporting gas for a combustion area.

3. The burner of claim 2,

the second air supply channel is annularly arranged between the first annular containing cavity and the second annular containing cavity and is communicated with the outside atmosphere, the central combustion area and the outer ring combustion area so as to provide sufficient air for the central combustion area and/or the outer ring combustion area.

4. The burner of claim 3,

the second air supply channel is provided with an annular flow distribution structure body capable of uniformly distributing air in the circumferential direction of the second air supply channel, and the annular flow distribution structure body is provided with a plurality of flow distribution holes in the circumferential direction.

5. The burner of claim 3,

the central fire cover is of an annular structure, the upper surface of the central fire cover is an inwards concave annular surface, and the central fire cover gas outlets are circumferentially distributed and annularly arranged on the inwards concave annular surface.

6. The burner of claim 5,

the central fire cover gas outlet is of a radially-arranged strip-shaped structure, the central fire cover gas outlet is circumferentially and uniformly distributed on the concave annular surface, the central fire cover gas outlet is of an inner groove type structure, and the central fire cover gas outlet is adjacent to the inner groove type structure in the same circumferential direction.

7. The burner of any of claims 1 to 6,

the outer ring fire cover covers the upper opening of the second annular cavity to form an outer ring gas channel, a plurality of outer ring fire cover gas outlets communicated with the outer ring gas channel are formed in the outer ring fire cover, and gas can be combusted at the outer ring fire cover gas outlets to form an outer ring combustion area;

the outer ring fire cover is of a ridge-shaped annular structure formed by a first annular portion and a second annular portion, a plurality of circumferentially distributed flow guide caps are arranged on the upper surface of the first annular portion and the upper surface of the second annular portion respectively in a protruding mode, and the gas outlets of the outer ring fire cover face adjacent flow guide caps arranged in the same circumferential direction.

8. The burner of claim 7,

the diversion cap is a radially-arranged strip-shaped structure, the first annular part and the second annular part are circumferentially and uniformly distributed, and a guide structure is formed on the other side of the strip-shaped structure opposite to the outer ring fire cover gas outlet so as to guide gas to the outer ring fire cover gas outlet.

9. The burner of claim 1,

the first annular accommodating cavity comprises an inner ring circumferential wall, an outer ring circumferential wall and an annular plate blocked at the same end of the inner ring circumferential wall and the outer ring circumferential wall, the hollow cavity on the inner side of the inner ring circumferential wall forms the first air supply channel, and the center of the central fire cover is provided with an air supply notch matched with the first air supply channel.

10. The burner of any of claims 1 to 6,

the combustor still includes ignition and flame-out protection device, be equipped with the ignition hole on the lateral wall of central fire lid first annular holds the chamber with between the second annular holds the chamber still be equipped with flame-out protection device installation position and ignition installation position on the furnace head, ignition installation position is located one side of ignition hole, ignition set firmly in ignition installation position, flame-out protection device set firmly in flame-out protection device installation position.

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