CN220287439U - Furnace end and cooking utensils of atmosphere mode of combustion - Google Patents

Abstract

The utility model discloses a furnace end and a stove in an atmospheric combustion mode, wherein the furnace end comprises a central fire cover and an outer ring assembly, a first fire hole is formed in the central fire cover, the outer ring assembly is of an annular structure and is correspondingly provided with an annular distribution chamber, the central fire cover is positioned at the inner side of the outer ring assembly, a first ventilation gap communicated with the outside atmosphere is formed below the outer ring assembly, the outer ring assembly is provided with a combustion part extending towards the central fire cover, an air outlet channel communicated with the distribution chamber is formed in the combustion part, a second fire hole communicated with the air outlet channel is formed in the upper side of the combustion part, at least six combustion parts are arranged around the central fire cover at intervals, a second ventilation gap is formed between every two adjacent combustion parts, and the second ventilation gap is communicated with the first ventilation gap. The utility model can concentrate the flame after the combustion of the fuel gas in the central area of the bottom of the cooker, is beneficial to improving the heating efficiency of the cooker and better meets the requirements of consumers on strong fire cooking.

Description

Furnace end and cooking utensils of atmosphere mode of combustion

Technical Field

The utility model relates to the technical field of gas appliances, in particular to an atmospheric combustion type furnace end and a stove.

Background

The existing household gas stove can be divided into a gas stove with an atmospheric combustion mode and a gas stove with a premixed combustion mode according to the gas combustion mode, wherein the gas combustion process with the atmospheric combustion mode comprises the following two steps: after being sprayed out from the fire hole of the gas stove, the mixture of the gas and the primary air is ignited by surrounding high-temperature flue gas to generate chemical reaction, so as to generate intermediate substances of aldehydes and alcohols, and simultaneously emit part of heat, which can be called primary combustion; the aldehydes and alcohols intermediate react with surrounding secondary air to generate carbon dioxide and water, and simultaneously emit most of heat to complete combustion.

The existing stove burner adopting the atmospheric combustion mode mostly adopts a double-ring structure, and is characterized by comprising an inner gas injection pipe and an outer gas injection pipe, wherein the inner injection pipe is responsible for central firepower of the burner, and the outer injection pipe is responsible for outer ring firepower of the burner. In the daily heating process of the pan or the sharp-bottomed pan, due to the characteristics of an atmospheric combustion mode and the fact that the secondary air supplement of the central part of the burner is insufficient, the gas flames contacted with the central area of the bottom of the heated pan are primary combustion products with relatively low temperature, the heating capacity is poor, the temperature of the central area of the bottom of the pan is low, the requirements of national strong fire cooking are not met, and the heat efficiency of the burner is also affected.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the furnace end in the atmospheric combustion mode, the mixture of the fuel gas and the primary air is sprayed out from the second fire hole, after the primary combustion is finished, the mixture can be quickly contacted with the secondary air through the second air-through gap to finish the complete combustion, and the flame after the fuel gas combustion is concentrated in the central area of the bottom of the cooker, so that the central area of the bottom of the cooker can be effectively heated, the heating efficiency of the furnace end is improved, and the requirements of consumers on strong fire cooking are better met.

The utility model also provides a stove with the atmospheric combustion type stove head.

According to the first aspect of the utility model, the atmospheric combustion burner comprises a central fire cover and an outer ring assembly, wherein the central fire cover is provided with a first fire hole, the outer ring assembly is of an annular structure and is correspondingly provided with an annular air distribution chamber, the central fire cover is positioned on the inner side of the outer ring assembly, a first ventilation gap communicated with the outside atmosphere is arranged below the outer ring assembly, the outer ring assembly is provided with a combustion part extending towards the central fire cover, the combustion part is internally provided with an air outlet channel communicated with the air distribution chamber, the upper side of the combustion part is provided with a second fire hole communicated with the air outlet channel, the combustion part is provided with at least six air distribution gaps and is arranged around the central fire cover at intervals, and a second ventilation gap is formed between two adjacent combustion parts and is communicated with the first ventilation gap.

According to the furnace end of the atmospheric combustion mode, which is disclosed by the embodiment of the utility model, the furnace end has at least the following beneficial effects: when the gas burner works, the mixture of the gas and the primary air enters the central fire cover from the injection pipe corresponding to the central fire cover and then is sprayed out from the first fire hole; at the same time, the mixture of the fuel gas and the primary air enters the gas distribution chamber of the outer ring assembly from the corresponding injection pipe of the outer ring assembly, then enters the gas outlet channels of the combustion parts from the gas distribution chamber respectively, and is sprayed out from the second fire holes; after being sprayed out from the corresponding fire holes, the mixture of the fuel gas and the primary air contacts with surrounding high-temperature gas, and after ignition, the primary combustion is completed, and an intermediate substance is generated; secondary air enters from a first ventilation gap below the outer ring assembly, passes through a second ventilation gap between combustion elements, and enters into an upper combustion zone; the intermediate matters after primary combustion of the fuel gas contact with secondary air, and complete combustion is completed in the upper combustion area. Through being equipped with six at least combustion parts at outer loop assembly spacer ring for after the mixture of gas and primary air is spouted from the second fire hole, is accomplished once burning, can be through the contact of second ventilation clearance with the secondary air rapidly, accomplish complete burning, and the flame after the gas burning is concentrated in the central zone of pan bottom, can effectively heat the central zone of pan bottom, is favorable to promoting furnace end heating efficiency, satisfies consumer's fierce fire culinary art demand well.

According to some embodiments of the utility model, an air conditioning plate is disposed below the combustion element, a plurality of ventilation holes are correspondingly disposed on the air conditioning plate, the ventilation holes are distributed around the central fire cover, and the second ventilation gap is communicated with the first ventilation gap through the ventilation holes.

According to some embodiments of the utility model, the middle part of the air-conditioning plate is provided with an avoidance hole, a connecting cylinder extending longitudinally is arranged at the avoidance hole, the connecting cylinder is provided with a connecting hole corresponding to the combustion piece, and the end part of the combustion piece is inserted into the corresponding connecting hole.

According to some embodiments of the utility model, the channel cross-sectional area of the outlet channel decreases in the direction of the outer ring assembly towards the central fire cover.

According to some embodiments of the utility model, a flow regulating structure is arranged between the gas distribution chamber and the gas outlet channel, and the flow regulating structure can regulate the ventilation area between the gas distribution chamber and the corresponding gas outlet channel.

According to some embodiments of the utility model, the flow regulating structure comprises a regulating ring, the regulating ring is arranged in the gas distribution chamber, the wall part of the regulating ring is arranged corresponding to the inlet end of the gas outlet channel and can partially shield the inlet end of the gas outlet channel, and the wall part of the regulating ring corresponds to different shielding degrees of different gas outlet channels.

According to some embodiments of the utility model, the combustion element is arranged on the inner side of the outer ring assembly, the outer ring assembly is provided with third fire holes communicated with the gas distribution chamber, and the sum of the gas outlet areas of all the second fire holes is greater than one half of the sum of all the third fire holes.

According to some embodiments of the utility model, the combustion element is disposed inside the ring of the outer ring assembly, and the second fire hole is disposed at a plane position lower than an upper outlet position of the outer ring assembly and at a distance of not less than 10 mm.

According to some embodiments of the utility model, the atmospheric burner further comprises a liquid-bearing plate, wherein the liquid-bearing plate is positioned below the central fire cover and the outer ring assembly, and the liquid-bearing plate and the outer ring assembly are arranged at an upper-lower interval so that the first ventilation gap is formed between the liquid-bearing plate and the outer ring assembly.

According to a second aspect of the utility model, a stove is provided which comprises a burner according to the first aspect of the utility model.

The kitchen range provided by the embodiment of the utility model has at least the following beneficial effects: through the furnace end adopting the atmospheric combustion mode, the flame after gas combustion can be concentrated in the central area of the bottom of the cooker, the central area of the bottom of the cooker can be effectively heated, the heating efficiency of the cooker is improved, and the requirements of consumers on strong fire cooking are better met.

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

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic cross-sectional view of an atmospheric burner according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a portion of the burner of FIG. 1;

FIG. 3 is an exploded view of the burner of FIG. 2;

fig. 4 is a schematic structural view of the burner in fig. 3.

Reference numerals:

a center fire cover 100, a first fire hole 101, a first injection pipe 110;

the outer ring assembly 200, the gas distribution chamber 201, the first ventilation gap 202, the combustion part 210, the gas outlet channel 211, the second fire hole 212, the second ventilation gap 213, the adjusting ring 220, the second injection pipe 230, the upper ring seat 240 and the lower ring seat 250;

an air conditioning plate 300, a vent 301, a dodging hole 302, a connecting cylinder 310, and a connecting hole 311;

a liquid bearing plate 400 and a heat collecting cover 500.

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 by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that if an orientation description is referred to, for example, the orientation or positional relationship indicated above, below, etc. is based on the orientation or positional relationship shown in the drawings, it is merely for convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, if a number, greater than, less than, exceeding, above, below, within, etc., words are present, wherein the meaning of a number is one or more, and the meaning of a number is two or more, greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number.

The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

Referring to fig. 1 and 2, an atmospheric burner comprises a central burner cover 100 and an outer ring assembly 200, wherein a first burner hole 101 is formed in the central burner cover 100, the outer ring assembly 200 is of an annular structure and is correspondingly provided with an annular distribution chamber 201, the central burner cover 100 is positioned at the inner side of the outer ring assembly 200, a first ventilation gap 202 communicated with the outside atmosphere is formed below the outer ring assembly 200, the outer ring assembly 200 is provided with a burner piece 210 extending towards the central burner cover 100, an air outlet channel 211 communicated with the distribution chamber 201 is formed in the burner piece 210, a second burner hole 212 communicated with the air outlet channel 211 is formed in the upper side of the burner piece 210, at least six burner pieces 210 are arranged at intervals around the central burner cover 100, a second ventilation gap 213 is formed between two adjacent burner pieces 210, and the second ventilation gap 213 is communicated with the first ventilation gap 202.

As can be appreciated, as shown in fig. 1, 2 and 3, the burner further includes a first injection pipe 110 and a second injection pipe 230, the first injection pipe 110 is disposed corresponding to the central fire cover 100 and is used for supplying air to the central fire cover 100, a plurality of first fire holes 101 are disposed on the upper side and the peripheral side of the central fire cover 100, the second injection pipe 230 is disposed corresponding to the outer ring assembly 200 and is used for supplying air to the air distribution chamber 201, the combustion parts 210 are provided with at least six and distributed at intervals around the inner side of the outer ring assembly 200, a second air-passing gap 213 penetrating up and down is formed between two adjacent combustion parts 210, and a plurality of second fire holes 212 are disposed on the upper side of the combustion parts 210 along the direction of the inner side of the outer ring assembly 200 toward the central fire cover 100.

In operation, a mixture of fuel gas and primary air enters the center fire cover 100 from the first injection pipe 110 and is then sprayed out from the first fire hole 101; at the same time, the mixture of the fuel gas and the primary air enters the gas distribution chamber 201 of the outer ring assembly 200 from the second injection pipe 230, then enters the gas outlet channels 211 of the plurality of combustion parts 210 from the gas distribution chamber 201 respectively, and is ejected from the second fire holes 212; after being sprayed out from the corresponding fire holes, the mixture of the fuel gas and the primary air contacts with surrounding high-temperature gas, and after ignition, the primary combustion is completed, and an intermediate substance is generated; the first vent gap 202 below the outer ring assembly 200 communicates with the outside atmosphere, and secondary air enters from the first vent gap 202 below the outer ring assembly 200, through the second vent gap 213 between the combustion members 210, and into the upper combustion zone; the intermediate matters after primary combustion of the fuel gas contact with secondary air, and complete combustion is completed in the upper combustion area.

In the existing cooking and heating process, as the mixture of the fuel gas and the primary air is combusted once to generate the aldehydes and the alcohols intermediate matters and release part of heat, the part of intermediate-temperature gas mixture is difficult to contact secondary air at one side of the bottom of the cooker and complete combustion, thus the intermediate-temperature region is always kept at a lower temperature, the mixture of the fuel gas and the primary air is ejected from the second fire holes 212 and is contacted with secondary air rapidly through the second air gaps 213 after the primary combustion is completed, the secondary air is directly supplied to the root of the flame, the intermediate-temperature region is reduced, the interior of the high-temperature region is moved, the flame after the fuel gas combustion is concentrated in the central region of the bottom of the cooker, the central region of the bottom of the cooker can be effectively heated, the heating efficiency of the burner is improved, and the requirements of fierce fire cooking of consumers are better met.

In practical application, the combustion parts 210 may also be disposed on the upper side of the outer ring assembly 200, that is, the air distribution chamber 201 is located below the combustion parts 210, and the combustion parts 210 may also be spirally distributed around the central fire cover 100, where the number of the combustion parts 210 may be 6, 10 or more, and the specific structures of the central fire cover 100 and the outer ring assembly 200 may be set correspondingly according to the actual use needs, which will not be described in detail herein.

In some embodiments, the outer ring assembly 200 is provided with an air conditioning plate 300 below the combustion element 210, and a plurality of ventilation holes 301 are correspondingly provided on the air conditioning plate 300, wherein the plurality of ventilation holes 301 are distributed around the central fire cover 100, and the second ventilation gap 213 is communicated with the first ventilation gap 202 through the ventilation holes 301.

As can be appreciated, as shown in fig. 1, 2 and 3, the air conditioning plate 300 is connected to the lower side surface of the outer ring assembly 200 and located below the combustion element 210, the ventilation holes 301 are in an arc-shaped through groove structure, the plurality of ventilation holes 301 are radially distributed around the central fire cover 100, and the second ventilation gap 213 is communicated with the first ventilation gap 202 below through the ventilation holes 301. By providing the air-conditioning plate 300, the secondary air distribution is regulated by the shape and distribution of the ventilation holes 301 thereon, which is advantageous in ensuring complete combustion of the fuel gas. In practical applications, the specific shape and distribution of the vent 301 may be set according to practical requirements, which is not limited herein.

In some embodiments, the middle part of the air-conditioning plate 300 is provided with a dodging hole 302, and a connecting cylinder 310 extending along the longitudinal direction is arranged at the dodging hole 302, the connecting cylinder 310 is provided with a connecting hole 311 corresponding to the combustion piece 210, and the end part of the combustion piece 210 is inserted into the corresponding connecting hole 311.

It can be understood that, as shown in fig. 1, 2 and 3, the middle part of the air-conditioning plate 300 is provided with a avoidance hole 302 for the first ejector tube 110 to penetrate and connect with the center fire cover 100 above, the upper side of the avoidance hole 302 is provided with a connecting cylinder 310, the peripheral wall of the connecting cylinder 310 is provided with a plurality of connecting holes 311 and distributed and arranged corresponding to a plurality of combustion parts 210, the outer ring assembly 200 comprises an upper ring seat 240 and a lower ring seat 250, the upper ring seat 240 and the lower ring seat 250 are connected and enclosed to form an air distribution cavity, the inner side wall of the upper ring seat 240 is provided with a hole for the combustion part 210 to penetrate, the end part of the combustion part 210, which is close to the outer ring assembly 200, penetrates through the upper ring seat 240, and the end part of the combustion part 210, which is far away from the outer ring assembly 200, is of a closed structure and is inserted into the corresponding connecting hole 311, so that both ends of the combustion part 210 are connected and supported, and stable and reliable connection is realized. In practical application, the specific structure of the connecting cylinder 310 and the arrangement and distribution of the connecting holes 311 can be set according to the practical use requirement.

In some embodiments, the channel cross-sectional area of the outlet channel 211 decreases in the direction of the outer ring assembly 200 toward the center fire cover 100. It can be understood that, as shown in fig. 1 to 4, the combustion element 210 is a sheet metal part, one end of the air outlet channel 211 facing the air distribution chamber 201 is in an open structure, and the channel cross-sectional area of the air outlet channel 211 decreases along the direction from the outer ring assembly 200 to the central fire cover 100, so as to better adapt to the decrease condition in the process of conveying the mixture of the fuel gas and the primary air along the direction, and make the pressure fluctuation of the mixture of the fuel gas and the primary air output by each second fire hole 212 along the direction from the outer ring assembly 200 to the central fire cover 100 smaller, thereby obtaining better combustion effect. In practical applications, the specific structure of the combustion element 210 may also be changed according to practical requirements.

In some embodiments, a flow adjustment structure is provided between the gas distribution chamber 201 and the gas outlet channel 211, and the flow adjustment structure can adjust the ventilation area between the gas distribution chamber 201 and the corresponding gas outlet channel 211. It can be appreciated that, since the mixture of the fuel gas and the primary air is gradually decreased in the process of being conveyed in the gas distribution chamber 201, the gas pressure at the outlet close to the second injection pipe 230 is relatively high, and the gas pressure at the outlet far away from the second injection pipe 230 is relatively low, and by setting the flow adjusting structure, the ventilation area between the gas distribution chamber 201 and the corresponding gas outlet channel 211 is adjusted, so that the ventilation area at the inlet side of each gas outlet channel 211 is adapted to the gas pressure, the combustion flame of each combustion part 210 can be relatively uniform, and a relatively good heating effect is achieved. In practical application, the flow adjusting structure can be set according to practical use requirements, and the flow adjusting structure is specifically described below.

Further, the flow adjusting structure includes an adjusting ring 220, the adjusting ring 220 is disposed in the air distribution chamber 201, a wall portion of the adjusting ring 220 is disposed corresponding to an inlet end of the air outlet channel 211 and can partially shield the inlet end of the air outlet channel 211, and the wall portion of the adjusting ring 220 corresponds to different shielding degrees of different air outlet channels 211.

It can be understood that, as shown in fig. 1 and 3, the peripheral wall of the adjusting ring 220 extends along the up-down direction, and is in a cylindrical structure, the adjusting ring 220 is disposed in the air distribution chamber 201 and surrounds the outer side of the ring surrounded by the plurality of combustion elements 210, so as to partially shield the inlet end of the air outlet channel 211, the height of the peripheral wall of the adjusting ring 220 is different, the wall portion of the adjusting ring near the outlet of the second injection pipe 230 is higher, so as to shield the inlet end of the air outlet channel 211 near the adjusting ring more, the ventilation area is reduced, the wall portion of the adjusting ring 220 far away from the outlet of the second injection pipe 230 is lower, so as to shield the inlet end of the air outlet channel 211 near the adjusting ring less, and the ventilation area is adjusted. In practical application, besides the above structure, corresponding baffles can be arranged at the inlet ends of the air outlet channels 211 to realize flow adjustment between the air distribution chamber 201 and the air outlet channels 211, and the flow adjustment can be changed correspondingly according to practical use requirements.

In some embodiments, the combustion element 210 is disposed on the inner side of the outer ring assembly 200, and the outer ring assembly 200 is provided with third fire holes (not shown in the figure) that are in communication with the air distribution chamber 201, and the sum of the air outlet areas of all the second fire holes 212 is greater than one half of the sum of all the third fire holes.

It is understood that the third fire holes may be disposed on the upper side of the outer ring assembly 200 and provided with a plurality of third fire holes distributed around the central fire cover 100, and the sum of the air outlet areas of all the second fire holes 212 is greater than one half of the sum of all the third fire holes, so that the fire distribution is relatively uniform, and larger fire differences between the position of the combustion element 210 and the position of the outer ring assembly 200 are avoided. In practical application, the distribution condition of the specific setting number of the third fire holes can be set correspondingly according to the practical use requirement.

In some embodiments, the combustion element 210 is disposed inside the ring of the outer ring assembly 200, and the second fire holes 212 are disposed at a plane position lower than the upper outlet position of the outer ring assembly 200 by a distance of not less than 10 mm. It will be appreciated that, as shown in fig. 1 and 2, the upper side of the outer ring assembly 200 may be configured as a cylindrical structure or a gradually expanding structure, the combustion element 210 is disposed on the inner side of the outer ring assembly 200, and the second flame holes 212 are disposed at a plane position lower than the upper outlet position of the outer ring assembly 200 and at a distance not smaller than 10 mm, so as to facilitate reducing the middle temperature area, moving inwards in the high temperature area, and improving the heat efficiency of the stove. In practical application, the structural shape of the upper side of the outer ring assembly 200 and the location of the second fire hole 212 can be set according to the practical requirement.

In some embodiments, the burner of the atmospheric combustion mode further comprises a liquid bearing disc 400, wherein the liquid bearing disc 400 is located below the central fire cover 100 and the outer ring assembly 200, and the liquid bearing disc 400 and the outer ring assembly 200 are arranged at an upper-lower interval, so that a first ventilation gap 202 is formed between the liquid bearing disc 400 and the outer ring assembly 200.

It can be understood that, as shown in fig. 1, the liquid bearing disc 400 is located below the central fire cover 100 and the outer ring assembly 200, so as to be used for containing the liquid dropped from the upper side, so as to avoid the liquid from entering the kitchen range, and the liquid bearing disc 400 and the outer ring assembly 200 are arranged at an upper-lower interval, so that a first ventilation gap 202 communicated with the external atmosphere is formed between the liquid bearing disc 400 and the outer ring assembly 200, and the structure is simple and convenient to use. In practical application, the specific structure of the liquid bearing disc 400 can be set according to practical use requirements.

In some embodiments, the upper side of the outer ring assembly 200 is provided with a heat collection shield 500. It can be understood that, as shown in fig. 1, the heat collecting cover 500 is disposed on the upper side of the outer ring assembly 200, and by disposing the heat collecting cover 500, the secondary air supply mode of the atmospheric cooker can be changed by the heat collecting cover 500, and the primary gradual supply is improved to directly supply to the root of the flame, thereby shortening the gas flame, i.e. shortening the middle temperature zone, so that the heated cooker is moved inwards in the heated high temperature zone, and improving the heat efficiency of the cooker while improving the temperature distribution of the effective working area at the bottom of the pointed-bottom cooker.

A cooktop according to an embodiment of the second aspect of the utility model includes a burner according to the above-described first aspect of the utility model in an atmospheric combustion mode.

According to the cooker provided by the embodiment of the utility model, by adopting the atmospheric combustion type burner, flame generated after gas combustion can be concentrated in the central area of the bottom of the cooker, the central area of the bottom of the cooker can be effectively heated, the heating efficiency of the cooker is improved, and the requirements of consumers on strong fire cooking are better met.

Since other constitution of the cooktop of the embodiment of the present utility model is known to those of ordinary skill in the art, it will not be described in detail here.

The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.

Claims (10)

1. An atmospheric combustion burner, comprising:

the central fire cover is provided with a first fire hole;

the outer ring assembly is of an annular structure and is correspondingly provided with an annular air distribution chamber, the central fire cover is located on the inner side of the outer ring assembly, a first ventilation gap communicated with the outside atmosphere is formed below the outer ring assembly, the outer ring assembly is provided with a combustion part extending towards the central fire cover, an air outlet channel communicated with the air distribution chamber is formed in the combustion part, a second fire hole communicated with the air outlet channel is formed in the upper side of the combustion part, at least six combustion parts are arranged and surround the central fire cover at intervals, a second ventilation gap is formed between every two adjacent combustion parts, and the second ventilation gap is communicated with the first ventilation gap.

2. The atmospheric burner according to claim 1 wherein the outer ring assembly has an air-conditioning plate disposed below the burner, the air-conditioning plate having a plurality of vent holes disposed therein, the plurality of vent holes disposed in a distributed manner around the central burner cover, and the second vent gap being in communication with the first vent gap through the vent holes.

3. The atmospheric burner according to claim 2, wherein the middle part of the air-conditioning plate is provided with a dodging hole and a connecting cylinder extending longitudinally is arranged at the dodging hole, the connecting cylinder is provided with a connecting hole corresponding to the combustion piece, and the end part of the combustion piece is inserted into the corresponding connecting hole.

4. The atmospheric burner according to claim 1 wherein the cross-sectional area of the outlet passage decreases in the direction of the outer ring assembly toward the central burner cap.

5. The atmospheric burner according to claim 1 wherein a flow adjustment structure is provided between the gas distribution chamber and the gas outlet channel, the flow adjustment structure being capable of adjusting the ventilation area between the gas distribution chamber and the corresponding gas outlet channel.

6. The atmospheric burner according to claim 5 wherein the flow control structure comprises a control ring disposed within the gas distribution chamber, the wall of the control ring being disposed in correspondence with the inlet end of the gas outlet passage and being capable of partially shielding the inlet end of the gas outlet passage, the wall of the control ring being different in degree of shielding in correspondence with different gas outlet passages.

7. The atmospheric burner according to claim 1 wherein the burner is disposed on the inner side of the outer ring assembly, the outer ring assembly has third fire holes communicating with the gas distribution chamber, and the sum of the gas outlet areas of all the second fire holes is greater than one half of the sum of all the third fire holes.

8. The atmospheric burner according to claim 1 wherein the burner is disposed inside the outer ring assembly and the second fire holes are disposed at a planar position below the upper outlet position of the outer ring assembly and at a distance of not less than 10 mm.

9. The atmospheric burner of claim 1 further comprising a liquid tray positioned below the central fire cover and the outer ring assembly, the liquid tray being spaced up and down from the outer ring assembly such that the liquid tray and the outer ring assembly form the first vent gap therebetween.

10. A hob, characterized in that it comprises a burner according to any one of the claims 1 to 9 in an atmospheric combustion mode.