CN114935145A

CN114935145A - Combustor and gas-cooker with draw and penetrate hybrid system

Info

Publication number: CN114935145A
Application number: CN202210601642.1A
Authority: CN
Inventors: 任富佳; 颜运宇; 马朝阳; 吴蔚; 吴伟良
Original assignee: Hangzhou Robam Appliances Co Ltd
Current assignee: Hangzhou Robam Appliances Co Ltd
Priority date: 2022-05-30
Filing date: 2022-05-30
Publication date: 2022-08-23

Abstract

The invention provides a burner with an injection mixing system and a gas stove, and relates to the technical field of gas cookers, wherein the burner with the injection mixing system comprises a burner and an outer ring fire cover; the furnace end at least comprises an outer ring and a middle ring, and a furnace end enclosure baffle plate is arranged between the outer ring and the middle ring; the furnace end enclosure partition plate is provided with a partition plate first outer ring air outlet and a partition plate second outer ring air outlet; the middle ring injection pipe is provided with a first middle ring air outlet; the outer ring fire cover comprises an outer ring mixing cavity and a middle ring mixing cavity, and the outer ring fire cover is buckled on the furnace end, so that the outer ring mixing cavity is communicated with the outer ring premixing cavity, and the middle ring mixing cavity is communicated with the middle ring premixing cavity. The gas stove comprises a burner with an injection mixing system. The technical problems that the air outlet pressure of the outer ring fire hole and the middle ring fire hole of the same fire cover is uneven and the flame and the tempering are easily caused in the prior art are solved, the air flow pressure field in the air distribution passage is consistent, the air flow of each fire hole of the outer ring fire cover is even, and the flame and the tempering are avoided.

Description

Combustor and gas-cooker with draw and penetrate hybrid system

Technical Field

The invention relates to the technical field of gas cookers, in particular to a burner with an injection mixing system and a gas cooker.

Background

At present, most of existing kitchen ranges in the market are embedded atmospheric burners, and a plurality of three-ring fire burners are applied to household gas cookers. Wherein, the three-ring fire burner adopts an inner ring nozzle to supply inner ring fire, a middle ring nozzle to supply middle ring fire and an outer ring nozzle to supply outer ring fire.

In order to ensure sufficient injection capacity, the burner is generally provided with at least two injection pipes to increase the heat load. In the outer ring injection, in order to ensure sufficient heat load, an outward fire hole and an inward fire hole are generally arranged on the same fire cover, but because the areas of the fire holes of the outer ring and the middle ring are not consistent, but the fire holes are both arranged in the outer ring injection mixing cavity, the flame combustion is easy to be unstable, and the phenomena of flame separation, backfire and the like occur.

Disclosure of Invention

The invention aims to provide a burner with an injection mixing system and a gas stove, so as to relieve the technical problems of flame separation and tempering easily caused by uneven air outlet pressure of fire holes outside and in the middle ring of a same fire cover in the prior art.

In a first aspect, the present invention provides a burner with injection mixing system, comprising: a furnace end and an outer ring fire cover;

the furnace end at least comprises an outer ring and a middle ring, a furnace end enclosure baffle is arranged between the outer ring and the middle ring, and divides the space between the outer ring and the middle ring into an outer ring premixing cavity and a middle ring premixing cavity, wherein an outer ring injection pipe is arranged at the air inlet end of the outer ring premixing cavity, and a middle ring injection pipe is arranged at the air inlet end of the middle ring premixing cavity;

the furnace end enclosure baffle is provided with a first baffle outer ring air outlet which is communicated with the outer ring premixing cavity and the outer ring ejector pipe and a second baffle outer ring air outlet which is communicated with the outer ring premixing cavity and the middle ring ejector pipe; the middle ring injection pipe is provided with a first middle ring air outlet communicated with the middle ring premixing cavity;

the outer ring fire cover comprises an outer ring mixing cavity and a middle ring mixing cavity which are arranged in a separated mode, and the outer ring fire cover is buckled on the furnace end, so that the outer ring mixing cavity is communicated with the outer ring premixing cavity, and the middle ring mixing cavity is communicated with the middle ring premixing cavity.

Furthermore, the outer ring injection pipe extends along the horizontal direction, and the outer ring injection inlet is positioned at the bottom of the outer ring;

the middle ring injection pipe extends along the horizontal direction, and the middle ring injection inlet is positioned at the bottom of the middle ring.

Furthermore, an outer ring injection outlet of the outer ring injection pipe is tangential to the bottom surface of the furnace end enclosure partition plate;

and/or the middle ring injection outlet of the middle ring injection pipe is arranged in parallel with the bottom surface of the furnace end enclosure partition plate.

Furthermore, the second outer ring air outlet of the partition plate is arranged on the tangent plane of the furnace end enclosure partition plate and the middle ring injection outlet and is arranged as a circular outlet.

Further, the outer ring injection pipe is provided with a second middle ring air outlet communicated with the middle ring premixing cavity;

the total area of the first middle ring air outlet and the second middle ring air outlet and the total area of the first outer ring air outlet of the partition plate and the second outer ring air outlet of the partition plate are set according to the power ratio of the outer ring to the middle ring.

Further, the outer ring ejector pipe and the middle ring ejector pipe are arranged in parallel and opposite directions or in parallel and same direction.

Further, a fire cover enclosure baffle plate is arranged inside the outer ring fire cover, and divides the inside of the outer ring fire cover into an outer ring mixing cavity and a middle ring mixing cavity;

the fire cover enclosure partition plate is connected with the furnace end enclosure partition plate in a sealing mode in an assembling state.

Further, an inner ring fire cover is also included;

the furnace end also comprises an inner ring, and the inner ring is positioned on the inner peripheral side of the middle ring;

the inner ring fire cover is buckled on the inner ring.

Furthermore, the outer ring ejector pipe and the middle ring ejector pipe are arranged on two sides of the inner ring, and a gap is reserved between the outer ring ejector pipe and the middle ring ejector pipe to form an air channel.

Has the advantages that:

according to the burner with the injection mixing system, the furnace end enclosure baffle is provided with a first outer ring air outlet of the baffle, which is communicated with the outer ring premixing cavity and the outer ring injection pipe, so that fuel gas can enter the outer ring premixing cavity from the outer ring injection pipe through the first outer ring air outlet of the baffle for premixing; moreover, the furnace end enclosure baffle is provided with a second outer ring air outlet of the baffle for communicating the outer ring premixing cavity and the middle ring injection pipe, so that fuel gas can pass through the second outer ring air outlet of the baffle by the middle ring injection pipe and also enter the outer ring premixing cavity for premixing; meanwhile, the middle ring ejector pipe is provided with a first middle ring air outlet communicated with the middle ring premixing cavity, so that fuel gas can enter the middle ring premixing cavity from the middle ring ejector pipe through the first middle ring air outlet to be premixed. Because the outer ring mixing cavity and the middle ring mixing cavity of the outer ring fire cover are arranged separately, and the outer ring fire cover is buckled on the furnace end, the outer ring mixing cavity can be communicated with the outer ring premixing cavity, and the middle ring mixing cavity can be communicated with the middle ring premixing cavity, the premixed gas in the outer ring mixing cavity can enter the outer ring mixing cavity to be fully mixed, and meanwhile, the premixed gas in the middle ring mixing cavity can enter the middle ring mixing cavity to be fully mixed.

Therefore, in the burner with the injection mixing system, all the fuel gas supplied by the outer ring injection pipe can be distributed to the outer ring mixing cavity for forming outer ring fire; the gas supplied by the middle ring ejector pipe, one part of the gas sequentially enters the middle ring premixing cavity and the middle ring mixing cavity through the first middle ring gas outlet to form middle ring fire, and the other part of the gas sequentially enters the outer ring premixing cavity and the outer ring mixing cavity through the second outer ring gas outlet of the partition plate to form outer ring fire.

In a second aspect, the present invention provides a gas range comprising: the burner with ejector mixing system of any preceding embodiment.

Has the advantages that:

the gas stove provided by the invention comprises the burner with the injection mixing system, so that the technical advantages and effects of the gas stove also comprise the technical advantages and effects of the burner with the injection mixing system, and the technical advantages and effects are not repeated herein.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of a burner with an injection mixing system according to an embodiment of the present invention;

FIG. 2 is a top view of a burner with an injection mixing system in accordance with an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a burner with an injection mixing system in accordance with one embodiment of the present invention;

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

FIG. 5 is a cross-sectional view taken along line B-B of FIG. 3;

FIG. 6 is a schematic partial structural view of a burner with an injection mixing system according to an embodiment of the present invention;

FIG. 7 is a longitudinal cross-sectional view of a burner with an injection mixing system in accordance with a second embodiment of the present invention;

fig. 8 is a schematic partial structural view of a burner with an injection mixing system according to a third embodiment of the present invention.

An icon:

100-furnace end; 110-outer ring; 120-middle ring; 130-furnace end enclosure partition plate; 140-outer ring premix chamber; 150-middle ring premix chamber; 160-outer ring ejector pipe; 170-middle ring injection pipe; 180-inner ring;

131-a baffle plate first outer ring air outlet; 132-baffle second outer ring outlet; 161-outer ring injection inlet; 162-second middle ring air outlet; 171-first middle ring air outlet; 172-medium ring injection inlet;

200-outer ring fire cover; 210-fire lid enclosure baffles; 220-outer ring mixing chamber; 230-medium ring mixing chamber;

300-inner ring fire cover.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may be, for example, 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Example one

Referring to fig. 1 to 5, in one embodiment, a burner with an injection mixing system is provided, and the burner includes a burner 100 and an outer ring fire cover 200; the furnace end 100 at least comprises an outer ring 110 and a middle ring 120, a furnace end enclosure baffle 130 is arranged between the outer ring 110 and the middle ring 120, the space between the outer ring 110 and the middle ring 120 is divided into an outer ring premixing cavity 140 and a middle ring premixing cavity 150 by the furnace end enclosure baffle 130, wherein an outer ring ejector tube 160 is arranged at the air inlet end of the outer ring premixing cavity 140, and a middle ring ejector tube 170 is arranged at the air inlet end of the middle ring premixing cavity 150; the furnace end enclosure partition 130 is provided with a partition first outer ring air outlet 131 for communicating the outer ring premixing cavity 140 with the outer ring ejector tube 160 and a partition second outer ring air outlet 132 for communicating the outer ring premixing cavity 140 with the middle ring ejector tube 170; the middle ring injection pipe 170 is provided with a first middle ring air outlet 171 communicated with the middle ring premixing cavity 150; the outer ring fire cover 200 comprises an outer ring mixing cavity 220 and an intermediate ring mixing cavity 230 which are arranged separately, the outer ring fire cover 200 is buckled on the burner 100, so that the outer ring mixing cavity 220 is communicated with the outer ring premixing cavity 140, and the intermediate ring mixing cavity 230 is communicated with the intermediate ring premixing cavity 150.

In the burner with the injection mixing system provided by this embodiment, the furnace end enclosure partition 130 is provided with a first outer ring air outlet 131 of the partition for communicating the outer ring premixing cavity 140 and the outer ring injection pipe 160, so that the fuel gas can enter the outer ring premixing cavity 140 through the first outer ring air outlet 131 of the partition by the outer ring injection pipe 160 to be premixed; moreover, the furnace end enclosure baffle 130 is provided with a baffle second outer ring air outlet 132 for communicating the outer ring premixing cavity 140 and the middle ring ejector pipe 170, so that the fuel gas can pass through the baffle second outer ring air outlet 132 from the middle ring ejector pipe 170 and also enter the outer ring premixing cavity 140 for premixing; meanwhile, the middle ring induction pipe 170 is provided with a first middle ring air outlet 171 communicated with the middle ring premixing cavity 150, so that the fuel gas can enter the middle ring premixing cavity 150 from the middle ring induction pipe 170 through the first middle ring air outlet 171 for premixing. Because the outer ring mixing cavity 220 and the middle ring mixing cavity 230 of the outer ring fire cover 200 are arranged separately, and the outer ring fire cover 200 is buckled on the burner 100, the outer ring mixing cavity 220 can be communicated with the outer ring premixing cavity 140, and the middle ring mixing cavity 230 can be communicated with the middle ring premixing cavity 150, the premixed gas in the outer ring mixing cavity 220 can enter the outer ring mixing cavity 220 to be fully mixed, and meanwhile, the premixed gas in the middle ring mixing cavity 230 can enter the middle ring mixing cavity 230 to be fully mixed.

It can be seen that in the burner with ejector mixing system, the gas supplied by the outer ring ejector tube 160 can be entirely distributed to the outer ring mixing chamber 220 for forming the outer ring 110 fire; according to the arrangement, the consistency of airflow pressure fields in the distribution cavity can be ensured by controlling the gas flow of the outer ring 120, so that the airflow flow of each fire outlet (mainly comprising the outer ring 110 fire outlet and the middle ring 120 fire outlet) on the outer ring fire cover 200 is uniform, the uniform and stable combustion working condition is realized, and the occurrence of flame leaving and backfire is avoided.

Referring to fig. 2 to 5, the outer ring injection pipe 160 extends along the horizontal direction, and the outer ring injection inlet 161 is located at the bottom of the outer ring 110; the middle ring injection pipe 170 extends in the horizontal direction, and the middle ring injection inlet 172 is located at the bottom of the middle ring 120. So set up, can increase the extension length that outer loop penetrated pipe 160 and middle loop penetrated pipe 170 relatively, can reduce the velocity of flow of gas and air mixing gas, promote the intensive mixing of gas and air to improve and penetrate the ability, realize the complete combustion.

Briefly, the primary gas injection air enters the outer ring injection pipe 160 through the outer ring injection inlet 161, is primarily mixed in the outer ring injection pipe 160, enters the outer ring premixing cavity 140 through the first outer ring air outlet 131 of the partition plate, and then flows into the outer ring mixing cavity 220 of the outer ring fire cover 200.

The gas-induced primary air enters the middle ring induction pipe 170 through the middle ring induction inlet 172, and after preliminary mixing in the middle ring induction pipe 170, most of the mixed gas flows into the middle ring premixing cavity 150 through the first middle ring air outlet 171, and a part of the mixed gas flows into the outer ring premixing cavity 140 through the second outer ring air outlet 132 of the partition plate.

Specifically, referring to fig. 2 to 5, the outer ring injection outlet of the outer ring injection pipe 160 is tangential to the bottom surface of the furnace end enclosure partition 130; the middle ring injection outlet of the middle ring injection pipe 170 is arranged in parallel with the bottom surface of the furnace end enclosure partition plate 130.

Referring to fig. 5, the second partition wall outer ring air outlet 132 is disposed on the section of the furnace end enclosure partition 130 and the middle ring injection outlet, and is configured as a circular outlet.

Referring to fig. 4 or 5, a fire cover enclosure partition plate 210 is disposed inside the outer fire cover 200, and the fire cover enclosure partition plate 210 partitions the inside of the outer fire cover 200 into an outer ring mixing cavity 220 and a middle ring mixing cavity 230; wherein, the opposite surfaces of the fire cover enclosure partition 210 and the burner enclosure partition 130 are hermetically connected in the assembled state to prevent the gas from leaking out of the fire cover enclosure partition.

Referring to fig. 1 and 3, the burner with injection mixing system further comprises an inner ring fire cover 300; the burner 100 further includes an inner ring 180, the inner ring 180 being located at an inner circumferential side of the middle ring 120; the inner ring fire cover 300 is fastened to the inner ring 180, wherein the gas supply of the inner ring 180 can be provided by an inner ring ejector pipe, which is not described in detail herein.

Referring to fig. 2 and 3, the outer ring ejector tube 160 and the middle ring ejector tube 170 are disposed at two sides of the inner ring 180, and a gap is left between the two for forming an air passage, and air can flow from the bottom of the burner 100 to the outer ring fire cover 200 and around the copper core through the air passage, so as to provide secondary air for gas combustion on the outer ring fire cover 200.

Referring to fig. 3, the outer ring ejector tube 160 and the middle ring ejector tube 170 are parallel and arranged in opposite directions, that is, the gas in the two tubes is an opposite flow path, and each does not affect the supply of the gas.

Example two

The second embodiment also provides a burner with an injection mixing system, which is different from the first embodiment in that: referring to fig. 6 and 7, the outer ring ejector tube 160 is provided with a second middle ring air outlet 162 communicated with the middle ring premixing chamber 150; the sum of the areas of the first middle ring air outlet 171 and the second middle ring air outlet 162 and the sum of the areas of the first outer ring air outlet 131 of the partition plate and the second outer ring air outlet 132 of the partition plate are set according to the power ratio of the outer ring 110 to the middle ring 120.

For example, when the inner/outer power ratio is 1/3, the ratio of the middle ring air outlet area to the outer ring air outlet area is 1/3.

In this embodiment, for the outer ring ejector tube 160, most of the fuel gas supplied from the outer ring ejector tube 160 enters the outer ring premix chamber 140 through the first outer ring air outlet 131 of the partition plate, and a small part of the fuel gas enters the middle ring premix chamber 150 through the second middle ring air outlet 162; for the middle ring injection pipe 170, reference may be made to the first embodiment, and details are not repeated herein.

In the second embodiment, compared with the first embodiment, more gas is distributed to the middle ring premixing cavity 150, so that the requirement of larger middle ring heat can be met, and the sufficient supply of middle ring gas can be ensured.

EXAMPLE III

Referring to fig. 8, a third embodiment of the present invention also provides a burner with an injection mixing system, which is different from the first embodiment or the second embodiment in that: the outer ring ejector tube 160 and the middle ring ejector tube 170 are arranged in parallel and in the same direction, that is, the fuel gas in the two tubes is a flow path in the same direction.

It should be noted that, parallel and opposite arrangement or parallel and same-direction arrangement requires adaptive adjustment of the positions of the corresponding holes (i.e. holes through which the gas passes) on the fire cover enclosure partition plate 210, so that the gas can enter the corresponding cavities.

Example four

The fourth embodiment provides a gas stove, which comprises the burner with the injection mixing system of the previous embodiment. The gas stove provided by the embodiment comprises the burner with the injection mixing system, and therefore the technical advantages and effects which can be achieved by the gas stove also comprise the technical advantages and effects which can be achieved by the burner with the injection mixing system, and are not repeated herein.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a combustor with draw and penetrate hybrid system which characterized in that includes: a furnace end (100) and an outer ring fire cover (200);

the furnace end (100) at least comprises an outer ring (110) and a middle ring (120), a furnace end enclosure partition plate (130) is arranged between the outer ring (110) and the middle ring (120), the space between the outer ring (110) and the middle ring (120) is divided into an outer ring premixing cavity (140) and a middle ring premixing cavity (150) by the furnace end enclosure partition plate (130), an outer ring ejector pipe (160) is arranged at the air inlet end of the outer ring premixing cavity (140), and a middle ring ejector pipe (170) is arranged at the air inlet end of the middle ring premixing cavity (150);

the furnace end enclosure partition plate (130) is provided with a first partition plate outer ring air outlet (131) for communicating the outer ring premixing cavity (140) with the outer ring injection pipe (160) and a second partition plate outer ring air outlet (132) for communicating the outer ring premixing cavity (140) with the middle ring injection pipe (170); the middle ring injection pipe (170) is provided with a first middle ring air outlet (171) communicated with the middle ring premixing cavity (150);

the outer ring fire cover (200) comprises an outer ring mixing cavity (220) and a middle ring mixing cavity (230) which are arranged in a spaced mode, the outer ring fire cover (200) is buckled on the furnace end (100), so that the outer ring mixing cavity (220) is communicated with the outer ring premixing cavity (140), and the middle ring mixing cavity (230) is communicated with the middle ring premixing cavity (150).

2. The burner with injection mixing system as set forth in claim 1, wherein the outer ring injection pipe (160) is extended in a horizontal direction, and the outer ring injection inlet (161) is located at the bottom of the outer ring (110);

the middle ring injection pipe (170) extends along the horizontal direction, and the middle ring injection inlet (172) is positioned at the bottom of the middle ring (120).

3. The burner with injection mixing system as recited in claim 2, characterized in that the outer ring injection outlet of the outer ring injection pipe (160) is tangential to the bottom surface of the burner enclosure baffle (130);

and/or the middle ring injection outlet of the middle ring injection pipe (170) is arranged in parallel with the bottom surface of the furnace end enclosure partition plate (130).

4. The burner with injection mixing system as set forth in claim 3, wherein the second outer ring outlet (132) is disposed on a tangent plane of the burner enclosure baffle (130) and the middle ring injection outlet and is configured as a circular outlet.

5. The burner with injection mixing system as set forth in claim 1, wherein the outer ring injection tube (160) is provided with a second intermediate ring air outlet (162) communicating with the intermediate ring premixing chamber (150);

wherein, the sum of the areas of the first middle ring air outlet (171) and the second middle ring air outlet (162) and the sum of the areas of the first outer ring air outlet (131) of the partition plate and the second outer ring air outlet (132) of the partition plate are set according to the power ratio of the outer ring (110) to the middle ring (120).

6. Burner with injection mixing system according to claim 1, characterized in that said outer ring injection pipe (160) is arranged parallel and opposite or parallel and in the same direction as said intermediate ring injection pipe (170).

7. The burner with the injection mixing system as claimed in claim 1, wherein the inner part of the outer ring fire cover (200) is provided with a fire cover enclosure partition plate (210), and the fire cover enclosure partition plate (210) divides the inner part of the outer ring fire cover (200) into the outer ring mixing cavity (220) and the middle ring mixing cavity (230);

wherein, the opposite surfaces of the fire cover enclosure clapboard (210) and the furnace end enclosure clapboard (130) are in sealing connection in an assembling state.

8. Burner with injection mixing system according to any of claims 1 to 7, further comprising an inner ring fire cover (300);

the burner (100) further comprises an inner ring (180), the inner ring (180) being located at an inner circumferential side of the middle ring (120);

the inner ring fire cover (300) is buckled on the inner ring (180).

9. Burner with injection mixing system according to claim 8, characterized in that the outer ring injection pipe (160) and the middle ring injection pipe (170) are arranged on both sides of the inner ring (180) with a gap for forming an air passage between them.

10. A gas range, comprising: burner with injection mixing system according to any of claims 1 to 9.