CN107366907B

CN107366907B - Burner and gas cooker

Info

Publication number: CN107366907B
Application number: CN201710542717.2A
Authority: CN
Inventors: 赖育文; 余悦泳; 季俊生; 张炳卫
Original assignee: Midea Group Co Ltd; Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Priority date: 2017-07-05
Filing date: 2017-07-05
Publication date: 2023-01-31
Anticipated expiration: 2037-07-05
Also published as: CN107366907A

Abstract

The invention discloses a combustor and a gas cooker. The combustor includes gas distribution plate and first fire lid. The gas distribution plate comprises a first upper ring cavity. A placing ring for accommodating the first fire cover is formed at the top end of the first upper ring cavity. The placement ring completely covers the side of the first fire cover. In the burner provided by the embodiment of the invention, after the first fire cover is arranged in the first upper ring cavity, the side surface of the first fire cover is completely covered by the side surface of the placing ring, so that the leakage of mixed gas of gas and air from the side surface of the first fire cover is avoided, and the combustion stability of the gas at the first fire cover is improved.

Description

Burner and gas cooker

Technical Field

The invention relates to the field of kitchen ware, in particular to a burner and a gas cooker.

Background

In the combustor of the prior art, the ring is placed to the inner ring infrared, generally with divide the gas dish separation and highly lower, cause the infrared fire lid of inner ring to place the back, the infrared ring of placing of inner ring and the infrared fire lid of inner ring between sealing performance not enough, the gas is easily placed the face of being connected between ring and the infrared fire lid of inner ring from the infrared of inner ring and is revealed, influences the stability of gas burning.

Disclosure of Invention

The embodiment of the invention provides a combustor and a gas cooker.

The burner provided by the embodiment of the invention comprises a gas distribution disc and a first fire cover, wherein the gas distribution disc comprises a first upper ring cavity, a placing ring for accommodating the first fire cover is formed at the top end of the first upper ring cavity, and the placing ring completely covers the side surface of the first fire cover.

In the burner provided by the embodiment of the invention, after the first fire cover is arranged in the first upper ring cavity, the side surface of the first fire cover is completely covered by the side surface of the placing ring, so that the leakage of mixed gas of gas and air from the side surface of the first fire cover is avoided, and the burning stability of the gas at the first fire cover is improved.

In some embodiments, the first fire lid is a porous infrared fire lid.

In some embodiments, the gas distributor plate includes a step structure within the placement ring, the step structure carrying the first fire cover.

In some embodiments, the gas distribution plate includes a second upper ring cavity disposed outside the first upper ring cavity, a bottom end of the second upper ring cavity defines a through hole, the placing ring is located right above the through hole, and an outer diameter of the placing ring is equal to an inner diameter of the through hole.

In some embodiments, a second fire cover is disposed on the second upper ring cavity, the second fire cover is provided with a plurality of first fire holes, a plurality of second fire holes and an annular first flame stabilizing groove, the first flame stabilizing groove is communicated with the plurality of second fire holes, and the first flame stabilizing groove is located above the plurality of first fire holes;

an included angle formed by the direction of the notch of the first flame stabilizing groove and the direction of the opening of the first fire hole is an acute angle.

In some embodiments, the gas distribution plate includes a third upper ring cavity and a fourth upper ring cavity, the third upper ring cavity is disposed outside the second upper ring cavity, the fourth upper ring cavity is located outside the third upper ring cavity, the fourth upper ring cavity and the third upper ring cavity are connected through a plurality of spaced connecting portions, and the connecting portions are provided with gas passages.

In some embodiments, a third fire cover is disposed on the fourth upper ring cavity, the third fire cover is provided with a plurality of third fire holes, a plurality of fourth fire holes and an annular second flame stabilizing slot, the second flame stabilizing slot is communicated with the plurality of fourth fire holes, and the second flame stabilizing slot is located above the plurality of third fire holes;

and an included angle formed by the direction of the notch of the second flame stabilizing groove and the direction of the opening of the third fire hole is an acute angle.

In some embodiments, the burner comprises a burner head, the gas distribution plate is arranged on the burner head, the burner head comprises a first lower ring cavity, a second lower ring cavity and a third lower ring cavity which are arranged from inside to outside,

a first step surface is formed at the bottom end of the first upper ring cavity, a first combining surface is formed at the side surface of the second upper ring cavity, and a second step surface is formed at the bottom end of the third upper ring cavity;

a third step surface is formed at the top end of the first lower ring cavity, a second combining surface is formed at the side surface of the second lower ring cavity, and a fourth step surface is formed at the top end of the third lower ring cavity;

the first step surface is connected with the third step surface in a matching mode, the second step surface is connected with the fourth step surface in a matching mode, and the first combining surface is connected with the second combining surface and located on the outer side of the second combining surface.

In certain embodiments, the burner includes a first injection pipe, a second injection pipe and a third injection pipe which are arranged at intervals, the first injection pipe is spirally connected with the second lower ring cavity, the second injection pipe is spirally connected with the third lower ring cavity, and the third injection pipe is connected with the first lower ring cavity.

In certain embodiments, the third ejector tube is in line with the first lower ring cavity.

In certain embodiments, the gas distribution plate is removably disposed on the furnace head.

The gas cooker provided by the embodiment of the invention comprises the burner in any one of the above embodiments.

Additional aspects and advantages of embodiments of the invention 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 invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic perspective view of a burner according to an embodiment of the present invention;

FIG. 2 is a schematic bottom view of a burner according to an embodiment of the present invention;

FIG. 3 is an exploded isometric view of a burner according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of a burner according to an embodiment of the invention;

FIG. 5 is a cross-sectional exploded schematic view of a burner according to an embodiment of the present invention;

FIG. 6 is a schematic perspective view of a gas distributor plate of a burner according to an embodiment of the present invention;

FIG. 7 is a schematic plan view of a gas distribution plate of a burner according to an embodiment of the invention;

fig. 8 is a perspective view of a burner head of the burner according to the embodiment of the present invention;

fig. 9 is a perspective view of a third fire cover of the burner according to the embodiment of the present invention;

FIG. 10 is a schematic plan view of a third fire cover of the burner according to the embodiment of the present invention;

FIG. 11 is a schematic cross-sectional view of a third fire cover of the burner according to the embodiment of the present invention;

FIG. 12 is an enlarged cross-sectional view of the third fire cover of FIG. 11 at I;

FIG. 13 is a schematic perspective view of a second fire cover in accordance with an embodiment of the invention;

FIG. 14 is a schematic plan view of a second fire cover in accordance with an embodiment of the invention;

fig. 15 is a schematic cross-sectional view of a second fire cover in accordance with an embodiment of the invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

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 and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered 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 to implicitly indicate the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the description of the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or may comprise the first and second features being in contact, not directly, but via another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

Referring to fig. 1 to 15, a burner 100 according to an embodiment of the present invention includes a gas distributor 20 and a first fire cover 224, wherein the gas distributor 20 includes a first upper ring cavity 22. The top end of the first upper ring cavity 22 is formed with a placement ring 226 for receiving the first fire cover 224. The placement ring 226 completely covers the side of the first fire cover 224.

In the burner 100 according to the embodiment of the present invention, after the first cap 224 is installed in the first upper ring cavity 22, the side surface of the placing ring 226 is completely covered by the side surface of the placing ring 226, so that the leakage of the mixed gas of gas and air from the side surface of the first cap 224 is avoided, and the stability of the combustion of the gas at the first cap 224 is improved.

In some embodiments, the first fire lid 224 is a porous infrared fire lid.

Therefore, the burner 100 can realize infrared combustion, the heat efficiency and the heat preservation performance of the burner 100 are greatly improved, and the purpose of energy conservation can be achieved. Meanwhile, the infrared combustion can promote the complete combustion of the fuel gas, thereby reducing toxic substances generated by incomplete combustion of the fuel gas and ensuring the physical health of users.

Specifically, in one example, the first fire cover 224 is a porous ceramic plate and is honeycomb-shaped.

Thus, the first fire cover 224 can withstand a high temperature, and the first fire cover does not burst due to the high temperature, thereby effectively prolonging the service life of the burner 100. Meanwhile, the porous ceramic plate is non-toxic, and can not generate substances harmful to human bodies after long-term use.

In certain embodiments, the gas distribution plate 20 includes a step structure 21 located within the placement ring 226. The stepped structure 21 carries a first fire cover 224.

So, first fire lid 224 can be installed on stair structure 21, and the location of first fire lid 224 is more convenient, and the installation is also more stable, has improved the efficiency of combustor 100 equipment.

Further, after the first fire cover 224 is placed on the step structure 21, the placing ring 226 can still completely cover the side of the first fire cover 224.

In certain embodiments, the gas distributor 20 includes a second upper ring cavity 24 disposed outside the first upper ring cavity 22. The bottom end of the second upper ring cavity 24 encloses a through hole 244. The placement ring 226 is positioned directly above the through hole 244. The outer diameter a of the placement ring 226 is equal to the inner diameter b of the through hole 244.

Thus, when the gas distributor 20 is manufactured, since the outer diameter a of the placing ring 226 is equal to the inner diameter b of the through hole 244, the excessive waste between the placing ring 226 and the second upper ring cavity 24 can be directly removed from the lower part by milling or other methods, and the second gas passage 146 communicating with the second upper ring cavity 24 is directly formed, thereby greatly improving the manufacturing efficiency of the gas distributor 20 and the burner 100.

In some embodiments, a second fire lid 246 is disposed on the second upper ring cavity 24. The second fire cover 246 defines a plurality of first fire holes 2462, a plurality of second fire holes 2464, and an annular first flame stabilizing groove 2466. The first flame stabilizing grooves 2466 communicate with the plurality of second flame holes 2464. The first flame holding groove 2466 is positioned above the plurality of first flame holes 2462. The direction of the notch of the first flame holding groove 2466 forms an acute angle with the opening direction of the first flame hole 2462.

Specifically, the second fire cover 246 may act as a middle fire cover.

A second fire lid chamber is formed in the second fire lid 246 and communicates with the first fire aperture 2462 and the second fire aperture 2464.

The first flame holding grooves 2466 are positioned above the plurality of first flame holes 2462, meaning that the first flame holding grooves 2466 are positioned above the plurality of first flame holes 2462 when the second flame cover 246 is normally mounted to the burner 100 or normally seated.

In one example, the first fire hole 2462 can be a primary fire hole of the middle ring cavity and the second fire hole 2464 can be a secondary fire hole of the middle ring cavity.

The air flow of the first flame holding groove 2466 may be provided by the second flame hole 2464, the air flow further diffuses in the first flame holding groove 2466 through the second flame hole 2464, the air flow ejected from the notch of the first flame holding groove 2466 and the air flow ejected from the opening of the first flame hole 2462 are alternately opposite to each other due to the acute angle β, the two air flows are drawn to each other, a stable combustion duty flame is formed at the notch of the first flame holding groove 2466, and the air flow of the first flame hole 2462 can be firmly dragged to form a combustion stable advection flame, so that the combustion of the gas is more stable.

In some embodiments, the first flame holding groove 2466 is opened substantially horizontally in the second flame cover 246, the plurality of first flame holding holes 2462 are obliquely arranged with respect to the first flame holding groove 2466, the plurality of second flame holding holes 2464 are perpendicular to the first flame holding groove 2466, and the plurality of first flame holding holes 2462 and the plurality of second flame holding holes 2464 are located on the same side of the first flame holding groove 2466. Therefore, the air flow diffused in the first flame holding grooves 2466 forms a nearly horizontal air flow at the notches of the first flame holding grooves 2466, so that the combustion of the flame on the burner 10 is more stabilized. Meanwhile, the first and

second flame holes

2462 and 2464 located on the same side of the first flame stabilizing groove 2466 may facilitate smooth gas flow into the first and

second flame holes

2462 and 2464. The plurality of second flame holes 2464 perpendicular to the first flame holding grooves 2466 may allow the gas flow in the first flame holding grooves 2466 to be more rapidly diffused.

In some embodiments, the gas distributor 20 includes a third upper ring cavity 26 and a fourth upper ring cavity 27, the third upper ring cavity 26 is disposed outside the second upper ring cavity 24, the fourth upper ring cavity 27 is located outside the third upper ring cavity 26, the fourth upper ring cavity 27 and the third upper ring cavity 26 are connected by a plurality of connecting portions 28 at intervals, and the connecting portions 28 are opened with a gas channel 282.

So, combustor 100 forms the gas distribution structure of outer ring and 3 passageways, and the gas distribution is more reasonable, and the burning of gas is also more even. The 3 gas channels are mutually independent, so that the combustor 100 realizes the special supply of three-ring gas, and the conditions that when the 3 gas channels are communicated, the gas supply of individual gas channels is insufficient and the flame combustion is unstable are avoided.

Specifically, in the present embodiment, there are 4 connecting portions 28, and 4 connecting portions 28 are uniformly connected between the fourth upper ring cavity 27 and the third upper ring cavity 26, that is, the axes of two adjacent connecting portions 28 along the length direction are spaced by 90 degrees.

In some embodiments, a third fire lid 264 is disposed on the fourth upper ring cavity 27. The third fire cover 264 has a plurality of third fire holes 2642, a plurality of fourth fire holes 2644, and an annular second flame holding groove 2646. The second flame holding groove 2646 communicates with a plurality of fourth flame holes 2644. The second flame holding grooves 2646 are located above the plurality of third fire holes 2642. The notch direction of the second flame holding groove 2646 forms an acute angle with the opening direction of the third flame hole 2642.

Specifically, the third fire cover 264 may serve as an outer ring fire cover.

A third fire lid chamber is formed in the third fire lid 264, and the third fire lid chamber communicates with the third fire hole 2642 and the fourth fire hole 2644.

The second flame holding grooves 2646 are located above the plurality of third fire holes 2642, meaning that the second flame holding grooves 2646 are located above the plurality of third fire holes 2642 when the third fire cover 264 is normally mounted to the burner 100 or normally laid out.

In one example, the third fire hole 2642 may serve as a main fire hole of the outer ring cavity, the fourth fire hole 2644 may serve as a sub fire hole of the outer ring cavity, the third fire hole 2642 and the fourth fire hole 2644 may be circular holes, and the third fire hole 2642 may have a larger hole diameter than the fourth fire hole 2644.

The airflow of the second flame holding groove 2646 may be provided by the fourth flame hole 2644, the airflow further diffuses in the second flame holding groove 2646 through the fourth flame hole 2644, the acute angle α makes the airflow ejected from the notch of the second flame holding groove 2646 and the airflow ejected from the opening of the third flame hole 2642 alternately collide with each other, the two airflows are drawn to each other, and a stable combustion duty flame is formed at the notch of the second flame holding groove 2646, and the airflow of the third flame hole 2642 may be firmly dragged to form a stable combustion advection flame, so that the combustion of the gas is more stable.

In some embodiments, the second flame holding groove 2646 is substantially horizontally opened in the third flame holding groove 264, the plurality of third flame holes 2642 and the plurality of fourth flame holes 2644 are obliquely arranged with respect to the second flame holding groove 2646, and the plurality of third flame holes 2642 and the plurality of fourth flame holes 2644 are located at the same side of the second flame holding groove 2646. Therefore, the air flow diffused in the second flame holding grooves 2646 forms a nearly horizontal air flow in the notches of the second flame holding grooves 2646, so that the combustion of the flame on the burner 10 is more stable. Meanwhile, the third and

fourth flame holes

2642 and 2644 located on the same side of the second flame holding groove 2646 may facilitate smooth airflow into the third and

fourth flame holes

2642 and 2644.

In certain embodiments, the burner 100 includes a burner 10. The gas distribution plate 20 is arranged on the burner 10. The burner 10 includes a first lower ring cavity 12, a second lower ring cavity 14 and a third lower ring cavity 16 arranged from the inside to the outside. The bottom end of the first upper ring cavity 22 is formed with a first step surface 122, the side surface of the second upper ring cavity 24 is formed with a first combining surface 142, and the bottom end of the third upper ring cavity 26 is formed with a second step surface 162. The top end of the first lower ring cavity 12 is formed with a third step surface 222, the side surface of the second lower ring cavity 14 is formed with a second combining surface 242, and the top end of the third lower ring cavity 16 is formed with a fourth step surface 262. The first stepped surface 122 is connected with the third stepped surface 222 in a matching manner, the second stepped surface 162 is connected with the fourth stepped surface 262 in a matching manner, and the first combining surface 142 is connected with the second combining surface 242 and is positioned outside the second combining surface 242.

In the burner 100 of the embodiment of the invention, the burner 10 and the gas distribution plate 20 adopt a plane and mirror surface sealing mode, and even if the burner 10 is deformed, the good sealing performance can still be kept between the burner 10 and the gas distribution plate 20, thereby ensuring the stability of flame combustion and smoke.

It should be noted that, in the present embodiment, the term "planar" sealing means that after the first step surface 122 and the third step surface 222 are abutted against each other, the first step surface 122 and the third step surface 222 are in planar close contact in the horizontal direction, and after the second step surface 162 and the fourth step surface 262 are abutted against each other, the second step surface 162 and the fourth step surface 262 are in planar close contact in the horizontal direction. The "mirror-surface" sealing manner mentioned in the present embodiment means that after the first combining surface 142 and the second combining surface 242 abut against each other, the first combining surface 142 and the second combining surface 242 are in close contact with each other, and are distributed in a mirror-image symmetrical manner with the center line of the combustor 100 as an axis.

Specifically, the bottom surface 2262 of the placement ring 226 is gradually enlarged from the first step surface 122 toward the top of the gas distribution plate 20.

In this way, when the gas enters the placing ring 226 from the burner 10, the gas flows upwards along the bottom 2262 of the placing ring 226 with good stability, and no turbulence is generated, so as to ensure the stability of the combustion of the gas above the second upper ring cavity 24.

Specifically, the connecting portion 28 and the third lower ring cavity 16 form a third gas passage 282. The first lower ring cavity 12 forms a first gas gallery 126. The second lower ring cavity 14 forms a second gas passage 146. The first gas channel 126, the second gas channel 146 and the third gas channel 282 are independent from each other to form a three-ring gas channel, a three-ring gas chamber is formed on the gas distribution plate 20, and the three-ring gas channel and the three-ring gas chamber are correspondingly communicated to form the three-ring combustor 100.

In the present embodiment, from the inside to the outside, the first lower ring cavity 12 connects with the first upper ring cavity 22 to form an inner ring gas cavity of the burner 100, the second lower ring cavity 14 connects with the second upper ring cavity 24 to form an intermediate ring gas cavity of the burner 100, and the third lower ring cavity 16 connects with the third upper ring cavity 26 to form an outer ring gas cavity of the burner 100.

In certain embodiments, the burner 100 includes a first eductor tube 144, a second eductor tube 164, and a third eductor tube 124 that are spaced apart. The first injection pipe 144 is spirally connected with the second lower ring cavity 14. The second ejector tube 164 is spirally connected with the third lower ring cavity 16, and the third ejector tube 124 is connected with the first lower ring cavity 12.

So, combustor 100 realizes three rings and draws the ejector pipe, and combustor 100's gas admission speed obtains promoting greatly, and the flame that combustor 100 produced is more stable. Meanwhile, the first injection pipe 144 and the second injection pipe 164 are respectively in spiral connection with the second lower ring cavity 14 and the third lower ring cavity 16 to form a curved gas ascending channel, when gas enters the gas cavity from the first injection pipe 144 and the second injection pipe 164, the curved gas ascending channel enables the gas to keep stable flow rate, turbulent flow cannot be formed in a bent place, and the stability of gas combustion is improved.

Specifically, primary air replenishing passages (not shown) are provided at the inlets of the first ejector pipe 144, the second ejector pipe 164 and the third ejector pipe 124.

So, the three-ring ejector pipe has improved the figure that the passageway was supplemented to primary air to increased the figure that the air supplyed, promoted the mixture of gas and air, made the gas burning more complete, reduced the extravagant problem of energy and the threat to health because of the incomplete burning of gas causes.

In some embodiments, the third ejector tube 124 is connected linearly to the first lower annular chamber 12.

Therefore, the third injection pipe 124 can convey the fuel gas into the first lower ring cavity 12 relatively quickly, and the sufficient supply of the fuel gas to the inner ring cavity is kept, so that the combustion stability of the inner ring flame is ensured. Meanwhile, the third ejector pipe 124 is linearly connected with the first lower ring cavity 12, so that the use of ejector pipe materials is reduced, the material-saving effect is achieved, and the manufacturing cost of the combustor 100 is reduced.

In some embodiments, the gas distribution plate 20 is removably disposed on the burner 10.

Thus, the user can easily detach the air distribution plate 20 from the burner 10 for cleaning during the use of the burner 100, thereby ensuring the sanitation of the burner 100.

When the burner 10 and the gas distribution plate 20 in this embodiment are connected, the first step surface 122 and the third step surface 222 are matched with each other, and the two step surfaces are abutted against each other; the second combining surface 242 and the first combining surface 142 are abutted against each other; the second step surface 162 and the fourth step surface 262 are engaged with each other, and both the step surfaces abut against each other.

In this way, the mirror surface and the plane sealing manner of the burner 100 of the present embodiment are realized at the same time, and the sealing property of the connection between the burner 10 and the gas distribution plate 20 is ensured. Meanwhile, the gas distribution plate 20 and the burner 10 are very convenient to mount and dismount.

In the description herein, references to the description of the terms "one embodiment," "certain embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A burner is characterized by comprising a gas distribution plate and a first fire cover, wherein the gas distribution plate comprises a first upper ring cavity, a placing ring for accommodating the first fire cover is formed at the top end of the first upper ring cavity, and the placing ring completely covers the side surface of the first fire cover; the gas distribution disc comprises a second upper ring cavity arranged on the outer side of the first upper ring cavity, a through hole is formed by the bottom end of the second upper ring cavity in a surrounding mode, the placing ring is located right above the through hole, and the outer diameter of the placing ring is equal to the inner diameter of the through hole; the gas distribution disc comprises a third upper ring cavity and a fourth upper ring cavity, the third upper ring cavity is arranged on the outer side of the second upper ring cavity, the fourth upper ring cavity is positioned on the outer side of the third upper ring cavity, the fourth upper ring cavity is connected with the third upper ring cavity through a plurality of connecting parts at intervals, a gas channel is formed in each connecting part, the burner comprises a burner head, the gas distribution disc is arranged on the burner head, the burner head comprises a first lower ring cavity, a second lower ring cavity and a third lower ring cavity which are arranged from inside to outside, a first step surface is formed at the bottom end of the first upper ring cavity, a first combining surface is formed on the side surface of the second upper ring cavity, and a second step surface is formed at the bottom end of the third upper ring cavity; a third step surface is formed at the top end of the first lower ring cavity, a second combining surface is formed at the side surface of the second lower ring cavity, and a fourth step surface is formed at the top end of the third lower ring cavity; the first step surface is connected with the third step surface in a matching mode, the second step surface is connected with the fourth step surface in a matching mode, and the first combining surface is connected with the second combining surface and located on the outer side of the second combining surface.

2. The burner of claim 1, wherein the first flame cap is a porous infrared flame cap.

3. The burner of claim 1, wherein the gas distributor plate includes a stepped structure within the placement ring, the stepped structure carrying the first fire cover.

4. The burner of claim 1, wherein a second fire cover is disposed on the second upper ring cavity, the second fire cover is provided with a plurality of first fire holes, a plurality of second fire holes and an annular first flame stabilizing groove, the first flame stabilizing groove is communicated with the plurality of second fire holes, and the first flame stabilizing groove is located above the plurality of first fire holes;

and an included angle formed by the direction of the notch of the first flame stabilizing groove and the direction of the opening of the first fire hole is an acute angle.

5. The burner according to claim 1, wherein a third fire cover is disposed on the fourth upper ring cavity, the third fire cover is provided with a plurality of third fire holes, a plurality of fourth fire holes and an annular second flame stabilizing groove, the second flame stabilizing groove is communicated with the plurality of fourth fire holes, and the second flame stabilizing groove is located above the plurality of third fire holes;

6. The burner according to claim 1, comprising a first injection pipe, a second injection pipe and a third injection pipe which are arranged at intervals, wherein the first injection pipe is spirally connected with the second lower ring cavity, the second injection pipe is spirally connected with the third lower ring cavity, and the third injection pipe is connected with the first lower ring cavity.

7. The burner of claim 6, wherein the third ejector tube is linearly connected to the first lower ring cavity.

8. The burner of claim 1, wherein the gas distribution plate is removably disposed on the burner head.

9. A gas cooker comprising a burner as claimed in any one of claims 1 to 8.