CN211781069U - Gas burner and stove - Google Patents

Abstract

The utility model relates to the technical field of gas cookers, in particular to a gas burner and a cooker; the gas burner comprises a base; the base comprises an ignition channel, a connecting part and at least two fire cover chassis, the connecting part is connected with two adjacent fire cover chassis, the ignition channel is arranged in the connecting part, an ignition hole is arranged on the ignition channel, and the ignition hole is positioned between the two fire cover chassis. The utility model discloses a set up the ignition hole on the ignition passageway between two fire lid chassis, increase outer fire ring, improve the performance of combustor.

Description

Gas burner and stove

Technical Field

The utility model relates to a gas-cooker technical field, in particular to gas burner and cooking utensils.

Background

The stove combustor is used as a core component of the gas stove and can directly influence the sufficiency of gas combustion. At present, most burners with a double-combustion-ring structure of a middle ring and an outer ring are adopted in the market, but the highest power of the burners in the category is generally low during combustion of gas, and along with the improvement of life quality, the high-power burners can reduce time, reduce waste of gas resources and living expenses in the cooking process of people, enrich the cooking modes of people and develop more recipes; the high-power combustor also needs to have a corresponding structure to enable the combustor to regulate and control the power, so that the potential safety hazard caused by the uncontrollable condition in the cooking process is avoided.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an improve a gas burner and cooking utensils, make things convenient for the outer ring combustor to ignite.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model discloses an aspect, a gas burner, the on-line screen storage device comprises a base, the base covers the chassis including ignition passageway and two at least fires, be equipped with the ignition hole on the ignition passageway, the ignition hole is located two between the fire lid chassis.

In a possible implementation manner, the base further comprises a connecting part, and the connecting part is connected with two adjacent fire cover chassis; the ignition channel is arranged in the connecting part; one end of the ignition channel is communicated with any one of the fire cover chassis.

In one possible implementation mode, an independent air inlet channel is arranged on any one of the fire cover chassis; one end of the ignition channel is communicated with the air inlet channel, and airflow enters the ignition channel from the air inlet channel and is output by the ignition hole.

In a possible implementation manner, the fire cover chassis comprises an inner ring fire cover chassis, an intermediate ring fire cover chassis and an outer ring fire cover chassis, the connecting part is connected with the inner ring fire cover chassis, the intermediate ring fire cover chassis and the outer ring fire cover chassis, and one end of the ignition channel is communicated with an air inlet channel of the inner ring fire cover chassis; the ignition hole is positioned between the middle ring fire cover chassis and the outer ring fire cover chassis.

In a possible implementation manner, fire grooves are formed in the middle ring fire cover chassis and the outer ring fire cover chassis along the circumferential direction.

In one possible implementation, the fire chute is arranged obliquely upwards.

In one possible implementation manner, a flow dividing part is arranged on the inner ring fire cover chassis; the ignition passage is located below the flow dividing portion at a position where the ignition passage communicates with the intake passage.

In a possible implementation manner, the gas burner further comprises a fire cover, wherein the fire cover comprises an inner ring fire cover, a middle ring fire cover and an outer ring fire cover, the inner ring fire cover, the middle ring fire cover and the outer ring fire cover are detachably covered on an inner ring fire cover chassis, a middle ring chassis and an outer ring chassis respectively, and an inner ring containing cavity, a middle ring containing cavity and an outer ring containing cavity are sequentially formed.

In a possible implementation manner, the middle ring fire cover is provided with a middle ring fire hole, and the middle ring fire hole comprises a middle ring inclined fire hole which is obliquely and upwards arranged on the inner side wall of the middle ring fire cover.

In a possible implementation manner, the intermediate ring fire hole further comprises an intermediate ring direct fire hole arranged on the upper surface of the intermediate ring fire cover.

In a possible implementation manner, an annular recess is arranged on the outer circumference of the inner ring fire cover, and the fire hole of the inner ring fire cover is arranged in the annular recess.

In another aspect of the present invention, a cooking appliance is provided, which comprises the gas burner as described above.

The utility model is provided with the ignition channel and the ignition hole to ignite the combustible gas on the outer ring ignition cover; by arranging the ignition hole between the two fire cover chassis, the flame on the ignition hole can reliably ignite the combustible gas on the outer ring fire cover.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

The technical solution of the present invention is further described in detail by the accompanying drawings and examples.

Drawings

Fig. 1 is a top view of a gas burner according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

FIG. 3 is a bottom view of FIG. 1;

FIG. 4 is an exploded view of a gas burner according to an embodiment of the present invention;

fig. 5 is a first isometric view of a gas burner in an embodiment of the invention;

fig. 6 is a second perspective view of a gas burner according to an embodiment of the present invention.

In the figure: the inner ring fire cover is 1, the middle ring fire cover is 2, the oblique fire hole of the middle ring is 21, the direct fire hole of the middle ring is 22, the outer ring fire cover is 3, the connecting part is 4, the outer ring air inlet channel is 5, the middle ring air inlet channel is 6, the inner ring air inlet channel is 7, the ignition channel is 8, the ignition hole is 9, the plug is 10, the inner ring fire cover chassis is 11, the shunting part is 111, the middle ring fire cover chassis is 12, the middle ring fire groove is 121, the outer ring fire cover chassis is 13, and the outer ring fire groove is 131.

Detailed Description

In the description of the present invention, it is to 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" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not 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 invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

The utility model provides a pair of gas burner, including fire lid and base, fire lid is located on the base and is connected with base detachably, or fire lid and base but integrated into one piece set up, for example can print the acquisition through 3D, to the situation of an organic whole, still can distinguish fire lid and base according to the function. A gas cavity is formed between the fire cover and the base. Referring to fig. 1-6, the base includes an ignition channel 8 and at least two fire cover pans, with two or more fire cover pans being coaxially disposed. One end of the ignition channel 8 is communicated with any one of the fire cover chassis, the ignition channel 8 is provided with an ignition hole 9, and in one embodiment, the position of the ignition hole 9 can be arranged between the two fire cover chassis or arranged at the outer wall of any one of the fire cover chassis. In the embodiment of the utility model provides an in, through using ignition channel 8 to transmit the combustible gas who comes from inboard gas chamber to burn at ignition hole 9, make ignition hole 9 can transmit flame to the combustible gas outside the fire hole of outer ring fire lid to the realization is to the operation that the outer loop was igniteed.

In one embodiment, an independent air inlet channel is arranged on any one fire cover chassis and is connected with an ejector, and the ejector guides combustible gas to the air inlet channel and enters the fire cover chassis from the air inlet channel; one end of the ignition channel 8 is communicated with the air inlet channel, and the combustible gas enters the ignition channel 8 from the air inlet channel and is then output from the ignition hole 9; in the embodiment of the utility model, at least one air inlet channel is arranged on the chassis of any one fire cover. As shown in fig. 2, the base further comprises a connecting part 4, and the connecting part 4 connects two adjacent fire cover chassis; an ignition channel 8 may be provided in the connection portion 4, the ignition channel 8 being communicable with an intake channel of one of the fire cover chassis. Wherein, connecting portion 4 can set up between two adjacent fire lid chassis to make two adjacent fire lid chassis between have the space of circulation of air, increase the secondary air coefficient on the combustor, and the corresponding fire hole quantity that can increase on the fire lid chassis, thereby improve the power of combustor. The connecting part 4 is arranged below the fire cover chassis, so that the defect that air is limited to be supplemented into the fire cover chassis due to the fact that the space between two adjacent fire cover chassis in the traditional stove fire cover is occupied by the connecting part 4 or other structures is overcome.

As shown in fig. 2, in the embodiment of the present invention, three fire cover chassis are provided, the fire cover chassis includes an inner fire cover chassis 11, an intermediate ring fire cover chassis 12 and an outer ring fire cover chassis 13 which are coaxially provided, the connecting portion 4 connects the inner fire cover chassis 11 and the intermediate ring fire cover chassis 12 and the outer ring fire cover chassis 13, and the ignition hole 9 may be located between the intermediate ring fire cover chassis 12 and the outer ring fire cover chassis 13.

As shown in fig. 1, in the embodiment of the present invention, the connecting portion 4 may be a cross structure, and the inner ring fire cover chassis 11, the middle ring fire cover chassis 12 and the outer ring fire cover chassis 13 are connected in sequence.

As shown in fig. 3 and 6, independent air inlet channels can be arranged on the inner ring fire cover chassis 11, the middle ring fire cover chassis 12 and the outer ring fire cover chassis 13, and the flow of combustible gas on each air inlet channel can be controlled respectively, so that different forms of combined combustion modes can be realized to adapt to different application environments. The embodiment of the utility model provides an in, the bottom of inner ring fire lid chassis 11 is equipped with inner ring inlet channel 7, and the bottom of intermediate ring fire lid chassis 12 is equipped with intermediate ring inlet channel 6, and the bottom of outer loop fire lid chassis 13 is equipped with outer loop inlet channel 5. The middle ring fire cover chassis 12 and the outer ring fire cover chassis 13 can be both in an annular structure and are not limited to the annular structure, the bottom of the middle ring fire cover chassis 12 can be symmetrically provided with two middle ring air inlet channels 6, the bottom of the outer ring fire cover chassis 13 can be symmetrically provided with two outer ring air inlet channels 5, and the air inlet channels are symmetrically arranged to enable combustible gas to be uniformly distributed in the gas containing cavity, so that the combustible gas is sprayed out from the fire holes to be ignited, the flame stability is high, and the combustion is more sufficient.

In another embodiment of the present invention, the middle ring fire cover chassis 12 or the outer ring fire cover chassis 13 is provided with at least one air inlet channel, and in case of only one air inlet channel, the position of the air inlet channel on the fire cover chassis is not limited; under the condition of arranging two or more air inlet channels, when the number of the air inlet channels is set to be even, the air inlet channels are arranged in pairwise symmetry; when the number of intake passages is set to singular, the distance between the intake passages is defined, and the distance between any two adjacent intake passages is a certain value. In one embodiment, the flow rates of the gas entering the inner ring air inlet channel 7, the middle ring air inlet channel 6 and the outer ring air inlet channel 5 can be respectively controlled through the regulating valves, and the flow rates of the gas entering the air inlet channels can be independently controlled, so that the regulating range of the gas can be further refined, and uniform fire regulation is realized.

In the embodiment of the utility model, the ignition channel 8 can be arranged in the connecting part 4 at the two opposite sides of the inner fire cover chassis 11, and one end of the ignition channel 8 is communicated with the inner ring air inlet channel 7 of the inner fire cover chassis 11; the ignition hole 9 is located between the middle ring fire cover chassis 12 and the outer ring fire cover chassis 13. Ignition holes 9 between the middle ring fire cover chassis 12 and the outer ring fire cover chassis 13 can be symmetrically arranged, so that the ignition holes 9 on two sides can quickly transmit flame in the middle ring fire cover chassis 12 to the fire holes of the outer ring fire cover chassis 13, and the ignition speed is accelerated. Moreover, because the pressure of the combustible gas close to the gas outlet of the gas inlet channel is high, and the pressure of the combustible gas far away from the gas outlet of the gas inlet channel is high, the flow of the combustible gas close to the gas outlet of the gas inlet channel is high, if the combustible gas is ignited by the flame of the ignition hole 9 at the moment, the flame with higher height can be caused at the gas outlet of the gas inlet channel, therefore, the gas inlet channel and the ignition hole 9 are arranged in a staggered mode, and the phenomenon that the combustible gas is ignited by the flame of the ignition hole 9 when the combustible gas flows out from the gas outlet of.

In one embodiment, the ignition hole 9 may be disposed above the ignition channel 8, so as to shorten the distance between the ignition hole 9 and the fire hole of the outer ring fire cover chassis 13 and the middle ring fire cover chassis 12, or shorten the distance between the ignition hole 9 and the fire hole of the fire cover covering the outer ring fire cover chassis 13 and the fire cover fire hole covering the middle ring fire cover chassis, so as to ensure that the flame on the ignition hole 9 can ignite the combustible gas on the outer ring fire cover chassis 13 smoothly.

As shown in fig. 2 and 4, a plurality of intermediate ring fire grooves 121 are circumferentially arranged at the upper end of the intermediate ring fire cover chassis 12, or the intermediate ring fire grooves 121 are arranged on the intermediate ring fire cover 2, and the intermediate ring fire cover 2 is covered on the intermediate ring fire cover base 12 to realize the gas outlet combustion; or the intermediate ring fire cover 2 and the intermediate ring fire cover base 12 are both provided with the intermediate ring fire groove 121, and the arrangement of the fire groove is not limited in this embodiment. In an embodiment, the middle ring fire chute 121 is disposed at the upper end of the side wall of the middle ring fire cover chassis 12, and the middle ring fire chute 121 is disposed obliquely upward, that is, the middle ring fire chute 121 gradually inclines upward from the inside to the outside, so that the fuel gas can be smoothly sprayed from the inside to the outside, the fluency is good, the flow rate is high, the combustible gas can be combusted more fully, and the overall power is improved. The upper end of the outer ring fire cover chassis 13 is provided with a plurality of outer ring fire grooves 131 along the circumferential direction, as shown in fig. 2 and 4. In this embodiment, outer ring fire slot 131 sets up on the inside wall of outer ring fire lid chassis 13, and outer ring fire slot 131 slope upwards sets up, and outer ring fire slot 131 adopts the structure form of gathering together inwards by outside tilt up gradually promptly, and the flame through outer ring fire slot 131 gathers together to inside, makes flame not scurry outward, reduces thermal scattering and disappearing, improves the efficiency. The diameters of the inner ring fire cover chassis 11, the middle ring fire cover chassis 12 and the outer ring fire cover chassis 13 are gradually increased in sequence, and the area covered by flame is increased due to the increase of the outer diameter of the outer ring fire cover chassis 13 and the increase of the area of the outer ring fire groove 131, so that the power is improved, and the heat load is high. The horizontal heights of the inner ring fire cover chassis 11, the middle ring fire cover chassis 12 and the outer ring fire cover chassis 13 are gradually increased in sequence, and the position of the outer ring fire groove 131 is higher than that of the middle ring fire groove 121, so that flame sprayed outwards through the middle ring fire groove 121 cannot flee outwards, heat loss is reduced, and the effect of improving energy efficiency is achieved.

The inner ring fire cover chassis 11 is provided with a flow dividing part 111, and the communication part of the ignition passage 8 and the inner ring air inlet passage 7 is positioned below the flow dividing part 111, as shown in fig. 2 and 4. The flow dividing part 111 is provided with a plurality of through holes and is used for dividing and mixing combustible gas entering the inner ring gas inlet channel 7, so that the overall mixing degree of the combustible gas is improved, and the bad condition that the combustible gas is directly sprayed out of the inner ring fire cover 1 and is ignited to generate instantaneous high flame is avoided; meanwhile, as the communication port between the ignition channel 8 and the inner ring air inlet channel 7 is positioned below the flow dividing part 111, a certain reverse pressure can be formed on the combustible gas which is injected into the inner ring air inlet channel 7 by the guide pipe in a guide way, so that the combustible gas can smoothly enter the ignition channel 8.

In the embodiment of the utility model, corresponding to the three fire cover chassis, the fire cover comprises an inner ring fire cover 1, a middle ring fire cover 2 and an outer ring fire cover 3, wherein the inner ring fire cover 1 is detachably covered on the inner ring fire cover chassis 11 and forms an inner ring containing cavity with the inner ring fire cover chassis 11, and the inner ring containing cavity is communicated with the inner ring air inlet channel 7; the airflow entering from the inner ring air inlet channel 7 is guided into the inner ring cavity by the flow dividing part 111 of the inner ring fire cover chassis 11 and then is ejected from the fire holes on the inner ring fire cover 1. The middle ring fire cover 2 is detachably arranged on the middle ring fire cover chassis 12 in a covering mode, a middle ring containing cavity of an annular structure is formed between the middle ring fire cover 2 and the middle ring fire cover chassis 12, and the middle ring containing cavity is communicated with the middle ring air inlet channel 6. The outer ring fire cover 3 is detachably covered on the outer ring fire cover chassis 13, an outer ring cavity is formed between the outer ring fire cover 3 and the outer ring fire cover chassis 13, and the outer ring cavity is communicated with the outer ring air inlet channel 5, as shown in fig. 2.

The embodiment of the utility model provides an in, it is sunken to be equipped with the annular on the outer circumference of inner ring fire lid 1, and the fire hole setting of inner ring fire lid 1 is sunken in the annular, and this structure is favorable to the effect of initial ignition, makes the ignition speed accelerate, raises the efficiency. As shown in fig. 2 and 4, the intermediate ring fire cover 2 is provided with an intermediate ring fire hole, the intermediate ring fire hole comprises an intermediate ring inclined fire hole 21 which is obliquely and upwardly arranged on the inner side wall of the intermediate ring fire cover 2, and the flame passing through the intermediate ring inclined fire hole 21 is inwardly gathered, so that the flame does not flee outwards, the heat loss is reduced, and the energy efficiency is improved. The embodiment of the utility model provides an in, the middle ring oblique fire hole 21 on the middle ring fire lid 2 and the middle ring fire groove 121 symmetry on the middle ring fire lid chassis 12 set up in the both sides that the middle ring holds the chamber, make the middle ring hold the atmospheric pressure of intracavity balanced to the balanced middle ring oblique fire hole 21 and the middle ring fire groove 121's the flow of giving vent to anger improves flame's stability.

In the embodiment of the present invention, the middle ring fire hole further includes a middle ring direct fire hole 22 disposed on the upper surface of the middle ring fire cover 2 to increase the combustion area, as shown in fig. 2 and 4; on the other hand, the intermediate ring direct-injection fire holes 22 directly inject fuel gas upwards, so that the fuel gas is rapidly contacted with the flame above, and the purpose of rapidly igniting the combustible gas sprayed by the intermediate ring fire cover 2 is achieved. In addition, since the intermediate ring direct injection holes 22 function to assist combustion, the number thereof can be relatively small. In this embodiment, four sets of intermediate ring direct flame injection holes 22 are equally spaced on the upper surface of the intermediate ring fire cover 2, so that the flames are uniformly distributed.

In the embodiment of the utility model, when the gas burner works, the combustible gas can be adopted to be in different combined combustion forms on the three ring fire covers according to the needs, namely, the gas can be in the form of independently burning on the inner ring fire cover 1, the combustible gas can be in the combined combustion on the inner ring fire cover 1 and the middle ring fire cover 2, the combustible gas can be in the combined combustion on the inner ring fire cover 1 and the outer ring fire cover 3, and the combustible gas can be simultaneously burned on the three ring fire covers; when the combustible gas is combined and combusted on the inner ring fire cover 1 and the middle ring fire cover 2 and the combustible gas is combined and combusted on the inner ring fire cover 1 and the outer ring fire cover 3, common frying can be realized, and energy is saved; when the combustible gas is simultaneously combusted on the three circular fire covers, the power is maximum, and the stir-frying can be realized. In the working process, the ignition hole 9 and the innermost ring fire cover 1 are in a constantly on-fire state so as to ensure that the combustible gas is regulated and regulated on the outer ring fire cover 3 to be ignited at any time.

To sum up, the utility model is in a form of realizing the combustion of combustible gas on the innermost ring and the outermost ring, thereby adding an ignition channel 8 and an ignition hole 9 for igniting the combustible gas on the outermost ring of the fire cover; one end of the ignition channel 8 is communicated with an air inlet channel of the innermost ring fire cover chassis, the other end of the ignition channel is provided with an ignition hole 9 positioned between the two fire cover chassis, wherein the ignition hole 9 and the innermost ring fire cover 1 are in a constantly fired state so as to ensure that combustible gas is smoothly ignited at any time by regulation and control on the outer ring fire cover 3.

In another embodiment of the utility model, when the number of the rings of the fire cover chassis is more than three, the ignition of the outer ring is realized by increasing the form of the ignition hole 9; and the ignition hole 9 can be arranged in a manner that the ignition hole 9 is arranged at the inner side of the outermost fire ring, or the ignition hole 9 is arranged between any two adjacent fire rings.

The embodiment of the utility model provides a cooking utensils is still provided, including the gas burner that any one embodiment provided as above. The cooking utensils of this embodiment are the kitchen utensils and appliances that have multiple combination burning form, and the gas burner sets up in the top of cooking utensils, and the function of multiple combination burning is realized through this gas burner. When the fire cover air inlet device works, air inlet of air inlet channels of different fire covers is controlled, so that combination adjustment of different firepower is realized. When the three fire covers simultaneously perform air inlet combustion, the power is maximum, and quick frying can be realized; when the inner ring fire cover 1 and the intermediate ring fire cover 2 or the outer ring fire cover 3 are combined for air inlet combustion, common frying is realized. Meanwhile, the adjusting valves added at the three air inlet channels can further refine the adjusting range and realize the uniform adjustment of firepower so as to improve the combustion and heating effects of the cooker, and the user experience is greatly improved.

In the embodiment of the present invention, the ignition mode of the cooker includes the following steps, but it should be noted that the above descriptions can be referred to each other to avoid redundancy:

first, an ignition command for the rim fire ring is obtained.

Here, the edge fire ring may refer to the outermost ring or the innermost ring, and may be referred to as an edge fire ring in this step as long as the pulse ignition mechanism of the gas cooker itself cannot directly act on the edge fire ring.

The ignition instruction refers to an instruction sent by a user or automatically sent by an electronic menu to ignite the edge fire ring. In particular, it may be that the user presses or rotates a button, or the electronic menu automatically controls the opening of the corresponding valve.

Secondly, a combustible gas is supplied to the edge fire ring.

In this step, when the valve is opened manually or automatically, the combustible gas flows along the gas passage to reach the rim fire ring. Here the gas appliance is open and provides access.

Thirdly, the combustible gas of the edge fire ring is combusted through a long fire.

Here, the long burning fire refers to a fire which is still burning in the case that the edge fire ring is extinguished, and is supported by a mechanism other than the fire ring of the gas range and other than the ignition mechanism of the gas range. Such as the above-mentioned fire in which the ignition hole burns.

The long-burning fire can be used for igniting the edge fire ring when the gas stove is in a working state, and can save the cost of independently arranging the ignition mechanism and prolong the service life of the ignition device.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (12)

1. The utility model provides a gas burner which characterized in that, includes the base, the base includes ignition channel and two at least fire lid chassis, be equipped with the ignition hole on the ignition channel, the ignition hole is located two fire lid chassis is between.

2. The gas burner of claim 1, wherein said base further comprises a connecting portion connecting two adjacent said fire cover pans; the ignition channel is arranged in the connecting part; one end of the ignition channel is communicated with any one of the fire cover chassis.

3. The gas burner of claim 2, wherein an independent air intake passage is provided in any one of said fire cover base plates; one end of the ignition channel is communicated with the air inlet channel, and airflow enters the ignition channel from the air inlet channel and is output by the ignition hole.

4. The gas burner of claim 3, wherein the fire cover chassis comprises an inner ring fire cover chassis, an intermediate ring fire cover chassis and an outer ring fire cover chassis, the connecting portion connects the inner ring fire cover chassis and the intermediate ring fire cover chassis and the outer ring fire cover chassis, and one end of the ignition channel is communicated with an air inlet channel of the inner ring fire cover chassis; the ignition hole is positioned between the middle ring fire cover chassis and the outer ring fire cover chassis.

5. The gas burner of claim 4, wherein the intermediate ring fire cover chassis and the outer ring fire cover chassis are provided with fire grooves along the circumferential direction.

6. The gas burner of claim 5, wherein said fire slots are disposed obliquely upward.

7. The gas burner of claim 4, wherein a splitter is provided on the inner ring fire cover chassis; the ignition passage is located below the flow dividing portion at a position where the ignition passage communicates with the intake passage.

8. The gas burner of claim 4, further comprising a fire cover, wherein the fire cover comprises an inner ring fire cover, an intermediate ring fire cover and an outer ring fire cover, and the fire cover is detachably covered on the inner ring fire cover chassis, the intermediate ring chassis and the outer ring chassis respectively to form an inner ring cavity, an intermediate ring cavity and an outer ring cavity in sequence.

9. The gas burner as claimed in claim 8, wherein the intermediate ring fire cover is provided with intermediate ring fire holes, and the intermediate ring fire holes include intermediate ring inclined fire holes obliquely and upwardly provided on an inner side wall of the intermediate ring fire cover.

10. The gas burner of claim 9, wherein the intermediate ring fire hole further includes an intermediate ring direct fire hole provided at an upper surface of the intermediate ring fire cover.

11. The gas burner of claim 8, wherein an annular recess is provided on an outer circumference of the inner ring fire cover, and the fire hole of the inner ring fire cover is provided in the annular recess.

12. A hob, characterized in comprising a gas burner according to any one of the claims 1 to 11.

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