CN221444267U - Burner - Google Patents

Abstract

The utility model discloses a combustor, which comprises a fire cover seat, an outer fire cover arranged on the fire cover seat, and a secondary air channel, wherein the outer fire cover is matched with the fire cover seat and is limited with an outer ring airflow channel, air inlets are arranged on the fire cover seat at intervals, air outlets are correspondingly arranged on the outer fire cover, and the air inlets and the air outlets are connected to form the secondary air channel. The secondary air channel provided by the utility model is formed in the outer ring airflow channel, pressurizes fuel gas in the outer ring airflow channel, ensures that the fire outlet hole of the outer fire cover stably discharges fire, and simultaneously directly guides the fuel gas to the combustion plate through the air outlet on the outer fire cover to supplement sufficient air, thereby being beneficial to more complete combustion of the fuel gas, improving the combustion efficiency and reducing the emission index.

Description

Burner

Technical Field

The utility model belongs to the technical field of gas cookers, and particularly relates to a combustor.

Background

At present, the gas stove mainly comprises an atmospheric burner, an infrared burner, an atmospheric and infrared combined burner and the like, and the related art discloses the atmospheric and infrared combined burner, wherein an inner fire cover of the atmospheric burner is wholly or partially replaced by an infrared combustion plate.

The Chinese patent with the application number 200920236403.0 discloses a combined type three-ring fire burner which comprises a burner, a distributor, a central fire cover and an outer fire cover, wherein the distributor consists of an inner fire cover seat and an outer fire cover seat, and the inner fire cover seat is communicated with an outer ring gas tank of the outer fire cover seat; an axial secondary air passage is formed between two adjacent passages. Secondary air reaches the outer fire cover through a secondary air channel on the outer fire cover seat, is then supplemented to the central fire cover through the inner fire cover, is not directly guided to the central fire cover through the outer fire cover, and has low combustion efficiency.

The present utility model has been made in view of this.

Disclosure of utility model

The utility model aims to solve the technical problems of overcoming the defects of the prior art and providing the burner which is easy to supplement secondary air and has high combustion efficiency.

In order to solve the technical problems, the utility model adopts the basic conception of the technical scheme that:

A burner comprises a fire cover seat, an outer fire cover arranged on the fire cover seat, and a secondary air channel;

The outer fire cover is matched with the fire cover seat and is provided with an outer ring airflow channel, and the secondary air channel is arranged in the outer ring airflow channel;

The secondary air channel comprises air inlets and corresponding air outlets, wherein the air inlets are arranged on the fire cover seat at intervals, the air outlets are arranged on the outer fire cover, and the air inlets and the air outlets are connected to form the secondary air channel.

Further, the air inlet and the air outlet are communicated through an annular wall arranged on the outer ring airflow channel, and the secondary air channel is close to the inner ring of the outer fire cover, is at least two along the circumferential direction and is at a distance from the outer ring of the outer fire cover.

Further, the inner ring of the outer fire cover is provided with mounting seats, the annular walls are arranged at intervals along the circumferential direction of the mounting seats, the annular walls are connected with the side walls of the mounting seats, and part of the side walls of the mounting seats are part of annular walls of secondary air channels.

Further, the annular wall comprises a side annular wall and a connecting wall, two ends of the side annular wall are respectively connected with the connecting wall, and the annular wall is connected with a first annular wall which is obliquely arranged from the inner ring of the outer fire cover to the edge of the outer fire cover.

Further, the side annular wall is arranged at the outer edge of the first annular wall and is concentric with the first annular wall, and the side annular wall is parallel to the side wall of the mounting seat.

Further, the air inlet is arranged at the lower end of the secondary air channel, and the air inlet is fan-shaped and is arranged on the fire cover seat at intervals along the circumferential direction; the air outlet is arranged at the upper end of the secondary air channel, and the air outlet is fan-shaped and arranged on the outer fire cover at intervals along the circumferential direction.

Further, the combustion device also comprises a combustion plate, wherein the combustion plate is arranged on the inner side of the mounting seat, and a plurality of secondary air channels are arranged on the periphery of the mounting seat for supporting the combustion plate at intervals;

the air outlet is spaced in height from a mounting seat supporting the combustion plate.

Further, the secondary air channel is a variable cross-section channel, and the height of the air outlet of the secondary air channel is gradually reduced along the direction close to the combustion plate.

Further, the fire cover seat is arranged above the liquid bearing disc at intervals of a certain height, and the secondary air channel is communicated with the outside through a gap between the air inlet and the liquid bearing disc.

Further, the liquid bearing disc is sleeved on the outer wall of the burner, and the fire cover seat is embedded on the inner side of the burner through a third boss protruding towards the liquid bearing disc.

After the technical scheme is adopted, compared with the prior art, the utility model has the following beneficial effects:

(1) The secondary air channel provided by the utility model is formed in the outer ring airflow channel, pressurizes fuel gas in the outer ring airflow channel, ensures that the fire outlet hole of the outer fire cover stably discharges fire, and simultaneously directly guides the fuel gas to the combustion plate through the air outlet on the outer fire cover to supplement sufficient air, thereby being beneficial to more complete combustion of the fuel gas, improving the combustion efficiency and reducing the emission index.

(2) The secondary air channel is arranged below the smoke exhaust channel, and when oxygen is provided for the combustion of the burner, external air enters the inner side of the outer fire cover from the air outlet of the secondary air channel to drive high-temperature smoke to flow, so that the high-temperature smoke can be effectively discharged from the smoke exhaust channel.

(3) The fire cover seat provided by the utility model is arranged above the liquid bearing disc, and a proper gap is reserved between the fire cover seat and the liquid bearing disc, so that the installation is convenient, and the secondary air supplement can be ensured.

The following describes the embodiments of the present utility model in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model, without limitation to the utility model. It is evident that the drawings in the following description are only examples, from which other drawings can be obtained by a person skilled in the art without the inventive effort.

In the drawings:

FIG. 1 is a schematic structural view of a burner;

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

FIG. 3 is a schematic view of the structure of the annular wall;

FIG. 4 is a schematic view of the structure of the outer fire cover;

FIG. 5 is a schematic view of the structure of the fire cover base;

Fig. 6 is a schematic view of the structure of the liquid bearing plate.

In the figure:

10. A high-permeability plate; 102. a support plate; 20. a combustion plate; 30. an outer fire cover; 304-1, side annular walls; 304-2, connecting walls; 304-a, an air outlet; 309. a second annular wall; 314. a first annular wall; 305. an ignition section; 316-d, sidewalls; 316-c, outer wall; 316-f, mounting base; 3041. a second connecting portion; 40. a fire cover seat; 402. an air inlet; 403. a second ring table; 405. a first air outlet; 406. a second air outlet; 408. a fourth fixing hole; 409. a first ring table; 410. a third boss; 50. a liquid bearing disc; 501. a second boss; 502. a first boss; 70. a burner; 702. an outer ring airflow passage.

It should be noted that these drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to the specific embodiments.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model, and the following embodiments are used to illustrate the present utility model, but are not intended to limit the scope of the present utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements 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, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1-6, the present utility model provides a burner, which comprises a fire cover seat 40 and an outer fire cover 30 arranged on the fire cover seat 40, and further comprises a secondary air channel, wherein the outer fire cover 30 is matched with the fire cover seat 40, and an outer ring air flow channel 702 is defined, the secondary air channel is arranged in the outer ring air flow channel 702, the secondary air channel comprises an air inlet 402 and an air outlet 304-a which are arranged on the fire cover seat 40 at intervals, and the air inlet 402 and the air outlet 304-a are connected to form the secondary air channel.

For ease of understanding, arrows in fig. 1 and 2 indicate the flow direction of secondary air.

Further, in order to improve the combustion efficiency, the utility model is provided with the secondary air channel which is used for supplementing secondary air to the burner, so that sufficient air can be supplemented to the combustion plate 20, more sufficient combustion of fuel gas is facilitated, thereby improving the heat efficiency and reducing the emission index.

It should be noted that, in the combustion process of the burner, primary air and secondary air are needed to cooperate with each other, in order to ensure complete combustion of fuel and reduce exhaust emission, additional air, namely secondary air, is sucked into the flame and the exhaust gas, and the content of oxygen in the secondary air is increased, so that unburned harmful substances carbon monoxide and hydrocarbon in the exhaust gas are combusted again in a high-temperature environment.

In this embodiment, a mounting seat 316-f is provided in the middle of the outer fire cover 30, and a plurality of annular walls are provided in the outer ring airflow channel 702, and the annular walls are disposed at intervals along the circumferential direction of the mounting seat 316-f and are connected with the same.

Further preferably, the circular mounting seat 316-f is disposed inside the outer fire cover 30, the lower surface of the mounting seat 316-f is abutted against the upper surface of the fire cover seat 40, the side wall 316-d of the mounting seat 316-f is a vertical annular surface, and the radian 316-d of the side wall is the same as the radian of the outer wall of the outer fire cover 30.

In this embodiment, four annular walls are further preferably disposed around the mounting seat 316-f, the annular wall is an annular wall with two bent ends, the annular wall can be formed by two bending steps, or can be formed by welding or connecting three sections of annular walls in the existing or existing fixing manner, and the two connecting manners provided in this embodiment can realize the sealing of the secondary air channel and prevent the loss of secondary air.

It is further preferred in this embodiment that the annular wall is connected to the mounting seat 316-f, a secondary air passage is formed between the annular wall and the mounting seat 316-f, the upper end of the annular wall is connected to the air outlet 304-a provided in the outer fire cover 30, the lower end of the annular wall is connected to the air inlet 402 provided in the fire cover seat 40, and secondary air is supplied from the air inlet 402, through the space between the annular wall and the mounting seat 316-f, and then from the air outlet 304-a into the burner.

In this embodiment, a second connection portion 3041 is provided on the annular wall and is connected with a fourth fixing hole 408 formed on the fire cover base 40, and the second connection portion 3041 is provided at the connection portion between the annular wall and the side wall 316-d of the mounting base 316-f.

Further preferably, in this embodiment, the lower end of the annular wall is in surface-to-surface contact with the fire cover seat 40, and is fixedly connected by a screw through the cooperation of the second connecting portion 3041 and the fourth fixing hole 408, so as to realize sealing and prevent secondary air from entering the outer ring airflow channel 702; the upper end of the annular wall is integrally formed with the outer fire cover 30 to completely isolate the secondary air passage from the outer annular air flow passage 702, thereby ensuring the combustion efficiency of the combustion plate 20.

In this embodiment, the annular wall includes a side annular wall 304-1 and a portion of a side wall 316-d connected to the connecting wall 304-2, and further includes a mounting seat 316-f, wherein two ends of the side annular wall 304-1 are respectively connected to the connecting wall 304-2, the other end of the connecting wall 304-2 is connected to the side wall 316-d of the mounting seat 316-f, and the side annular wall 304-1 is parallel to the side wall 316-d of the mounting seat 316-f.

Further preferably, the side annular wall 304-1 is connected to the side wall 316-d by the connecting wall 304-2, and the side annular wall 304-1, the connecting wall 304-2 and the side wall 316-d define a space therebetween in the outer annular air flow channel 702, preventing the fuel gas in the outer annular air flow channel 702 from entering the space, and the space communicates with the air outlet 304-a and the air inlet 402, and the secondary air passes through the air inlet 402, reaches the air outlet 304-a through the space, enters the burner interior, and provides secondary air.

It is further preferred in this embodiment that an outer ring airflow channel 702 is defined between the inner ring and the outer ring of the outer fire cover 30, and a communication channel is defined between adjacent annular walls, through which the outer ring airflow channel 702 on the side close to the inner ring of the outer fire cover 30 communicates with the outer ring airflow channel 702 on the side close to the outer ring of the outer fire cover 30.

It is noted that the gas flows from the burner 70 into the outer ring gas flow channel 702 near the inner ring side of the outer fire cover 30, a space is defined between the side wall 316-d and the side wall 317-b of the connecting portion of the outer fire cover 30, the space is a part of the outer ring gas flow channel 702, that is, the outer ring gas flow channel 702 near the inner ring side of the outer fire cover 30, the gas fills the space, and the gas flows into the outer ring gas flow channel 702 defined between the side wall 304-1 and the outer fire cover 30 by the communicating channel defined between the adjacent annular walls, that is, the outer ring gas flow channel 702 near the outer ring side of the outer fire cover 30.

It should be noted that, the gas passes through the communication channel from the outer ring airflow channel 702 inside the annular wall to the outer ring airflow channel 702 outside the annular wall, wherein the cross section area of the communication channel is far smaller than that of the outer ring airflow channels 702 at two ends, and it can be understood that the space of the communication channel is far smaller than that of the outer ring airflow channels 702 communicated at two ends of the communication channel, the gas passes through the communication channel, the pressure is increased, and the secondary air channels arranged at intervals provide more sufficient gas for the discharge of the outer fire cover 30, and meanwhile, the supply efficiency of the gas is accelerated.

The burner provided by the utility model further comprises a combustion plate 20, wherein the combustion plate 20 is arranged above the mounting seat 316-f, a plurality of secondary air channels are arranged at the periphery of the combustion plate 20 at intervals, part of annular walls of the secondary air channels are part of side walls 316-d of the mounting seat 316-f, the secondary air channels are a short distance from the combustion plate 20, secondary air directly supplies air to the combustion plate 20, specifically, the secondary air enters the burner from the air outlet 304-a through the secondary air channels through the air inlet 402, so that the combustion efficiency of the combustion plate 20 can be ensured.

The height of the combustion plate 20 is larger than or equal to that of the air outlet 304-a of the secondary air channel, the combustion plate 20 is arranged above the secondary air channel, secondary air is filled up the whole outer fire cover 30 from the bottom of the outer fire cover 30, and vertically and smoothly reaches the upper part of the combustion plate 20 from the air outlet 304-a through the secondary air channel through the air inlet 402, no blocking exists in the middle, the loss of secondary air is reduced, and the combustion efficiency of the burner is ensured more efficiently

In the present embodiment, the air inlet 402 is disposed at the lower end of the secondary air passage, and the air inlet 402 is fan-shaped and circumferentially disposed on the fire cover seat 40 at intervals; the air outlet 304-a is provided at the upper end of the secondary air passage, and the air outlet 304-a is fan-shaped and circumferentially spaced apart on the outer fire cover 30.

Specifically, the fire cover seat 40 is a disc, the edge of the upper surface of the fire cover seat 40 extends upwards to be provided with a first annular table 409 and a second annular table 403 respectively, the first annular table 409 is arranged on the inner side of the second annular table 403, the height of the first annular table 409 is smaller than that of the second annular table 403, a cavity is formed by downwards sinking the middle position of the fire cover seat 40, a plurality of air inlets 402 are formed in the upper surface of the fire cover seat 40 at intervals, and the air inlets 402 are arranged between the cavity and the first annular table 409. The air intake 402 is defined by a first arcuate wall on a side radially away from the combustion plate 20 and a second arcuate wall on a side radially closer to the combustion plate 20, the first arcuate wall having a radius greater than the radius of the second arcuate wall and a perimeter greater than the perimeter of the second arcuate wall.

It is noted that the upper surface of the fire cover seat 40 is a plane, the air inlet 402 is a through hole, and secondary air flows into the secondary air channel through the air inlet 402.

Specifically, the upper surface of the outer fire cover 30 is provided with four air outlets 304-a at intervals, the air outlets 304-a are communicated with the air inlet 402 to form a secondary air passage, and secondary air enters the secondary air passage from the air inlet 402 and then enters the combustion plate 20 from the air outlets 304-a.

Further, a first annular wall 314 and a second annular wall 309 are arranged on the upper surface of the outer fire cover 30, the first annular wall 314 is obliquely arranged on the upper surface of the outer fire cover 30 from one side close to the combustion plate 20 to the edge of the outer fire cover 30, the second annular wall 309 is obliquely arranged on the upper surface of the outer fire cover 30 away from the first annular wall 314 to the edge of the outer fire cover 30, and an included angle between the first annular wall 314 and the horizontal plane is smaller than an included angle between the second annular wall 309 and the horizontal plane.

Further, along the direction from the radial inner side to the radial outer side of the outer fire cover 30, the upper surface of the outer fire cover 30 is inclined downwards, and the downward inclination angle of the second annular wall 309 contacted with the edge of the outer fire cover 30 is larger than that of the first annular wall 314, so that the upper surface of the outer fire cover 30 can better play a role in guiding flow, and secondary air enters the combustor from the air outlet 304-a through the secondary air channel via the air inlet 402, so that the secondary air can more smoothly flow to the combustion plate 20, and the combustion efficiency of the combustor is ensured.

Preferably, the air outlet 304-a of the secondary air passage is disposed on the first annular wall 314, and it should be noted that the air outlet 304-a is disposed at a position around the lower portion of the combustion plate 20, and has a short distance from the combustion plate 20, and the secondary air passes through the air inlet 402, passes through the secondary air passage, and enters the burner from the air outlet 304-a, so as to reach the combustion plate 20 quickly, and ensure the combustion efficiency of the combustion plate 20.

It is noted that, at the same time, the height of the air outlet 304-a is far lower than the height of the combustion plate 20, and secondary air enters the burner from below, so that the burner can be quickly filled from below to above, and sufficient air is provided for the combustion plate 20, thereby ensuring combustion efficiency.

It should be further noted that the air outlet 304-a is disposed on the first annular wall 314, where the first annular wall 314 is an inclined plane, and it may be understood that the air outlet 304-a is of a variable cross-section structure, and the air outlet 304-a is disposed inclined outwards along the axis direction of the outer fire cover 30, where the air outlet 304-a is inclined towards the combustion plate 20, and the height of one side wall of the air outlet 304-a away from the combustion plate 20 is far greater than the height of the other side wall of the air outlet 304-a close to the combustion plate 20, where the secondary air enters the burner from the air outlet 304-a through the air inlet 402 via the secondary air channel, and due to the different heights of the two side walls of the air outlet 304-a, the secondary air can be guided to flow towards the combustion plate 20, so that the air above the combustion plate 20 is satisfied at the first time, and the combustion efficiency of the burner is ensured.

The burner provided by the utility model further comprises a burner 70 and a liquid bearing disc 50, wherein the liquid bearing disc 50 is sleeved on the outer wall of the burner 70, a fire cover seat 40 is embedded in the inner side of the burner 70 through a third boss 410 protruding towards the direction of the liquid bearing disc 50, the fire cover seat 40 is arranged above the liquid bearing disc 50 at a height interval, the liquid bearing disc 50 is arranged below the air inlet 402, a gap exists between the liquid bearing disc 50 and the air inlet 402, a secondary air channel is communicated with the outside through the gap between the air inlet 402 and the liquid bearing disc 50, in other words, secondary air enters the air inlet 402 through the gap.

In this embodiment, before the secondary air enters the air inlet 402, the secondary air passes through the gap between the liquid bearing disc 50 and the air inlet 402, and compared with the prior art, the secondary air flows into the gap from the outside, and the flow rate of the secondary air can be increased, so that the secondary air can flow into the secondary air channel more quickly, and sufficient air can be timely supplied to the burner.

Preferably, the upper surface of the liquid bearing disc 50 is also provided with a first boss 502 protruding upwards, the edge of the first boss 502 is rounded to guide secondary air into the gap to play a role in guiding flow,

Specifically, the liquid bearing plate 50 is square, four corners are rounded, the upper surface of the liquid bearing plate 50 is provided with a first boss 502 in an upward protruding mode, and the upper surface of the first boss 502 is provided with a second boss 501 in an upward extending mode.

Further, the diameter of the liquid bearing plate 50 is larger than that of the first boss 502, the diameter of the first boss 502 is larger than that of the second boss 501, and the diameter of the second boss 501 is equal to or slightly larger than that of the fire cover seat 40.

It should be noted that, there is a height difference between the first boss 502 and the second boss 501, in other words, the height of the second boss 501 is greater than that of the first boss 502, compared with the prior art, when overflow occurs, soup drips onto the liquid bearing plate 50, and as the height of the first boss 502 is smaller than that of the second boss 501, soup cannot flow to the second boss 501, that is, cannot flow to the inlet of the secondary air channel, thereby affecting the supplement of secondary air.

Meanwhile, when the edge of the first boss 502 is rounded and soup drops, if the soup drops directly onto the first boss 502, the soup does not flow to the inlet of the secondary air channel, and the secondary air supplement is not affected.

The burner provided in this embodiment further includes an ignition portion 305 and an ignition needle.

Regarding the relationship of the ignition portion 305 to the outer fire cover 30, the ignition portion 305 may be provided integrally with the outer fire cover 30 as a part of the outer fire cover 30; the ignition portion 305 may be mounted on the outer fire cover 30, and the ignition portion 305 may be provided at one end of the outer wall of the outer fire cover 30 as a part of the outer wall of the outer fire cover 30 after the ignition portion 305 and the outer fire cover 30 are mounted in place.

An ignition portion 305 is provided between the combustion plate 20 and the outer flame cover 30, and the fuel gas is branched to the outer wall of the outer flame cover 30 and the combustion plate 20 through the ignition portion 305.

In this embodiment, the ignition portion 305 is disposed in any one of the air outlets 304-a, and divides the air outlet 304-a into a first air outlet 405 and a second air outlet 406, and the ignition needle 90 is disposed in the first air outlet 405.

It is noted that the ignition needle is disposed in the first air outlet 405 and is communicated with the outside through the secondary air passage, and when the burner ignites, the ignition needle is disposed at the first air outlet 405 of the secondary air passage, so that the air content is sufficient and the ignition success rate is high.

In this embodiment, the smoke exhaust passage is further included, and the smoke exhaust passage includes a gap between an upper cover (including a high-permeability plate 10 and a circular support plate 102 for fixing the high-permeability plate 10) and an outer fire cover 30, specifically, the smoke exhaust passage is a gap between the upper cover and the outer fire cover 30 formed by connecting a plurality of stand columns between the upper cover and the outer fire cover 30 and a passage between the stand columns, and the smoke exhaust passage is communicated with a secondary air passage and the outside.

It should be noted that, the high temperature flue gas flows out from the combustion plate 20 along the smoke exhaust channel, so that the flue gas generated by the combustion of the combustion plate 20 can flow out of the burner, the combustion resistance of the combustion plate 20 is reduced, the injection quantity of primary air of the combustion plate 20 is further ensured, the combustion plate 20 is ensured to be fully combusted, and the combustion plate 20 is further ensured to emit infrared rays.

In the embodiment, the high-temperature flue gas exhausted by the smoke exhaust channel can flow upwards to the bottom of the cooker, and heat exchange with the bottom of the cooker is continued, so that the heat efficiency of the burner is improved. In addition, the flue gas generated by the combustion plate 20 can flow out through the flue gas channel, and the secondary air can flow to the combustion plate 20, thereby improving the combustion efficiency of the combustion plate 20.

In this embodiment, the air outlet 304-a of the secondary air passage is disposed below the smoke exhaust passage, and secondary air passes through the air inlet 402, through the secondary air passage, and then enters the space where the combustion plate 20 is located through the air outlet 304-a, and is communicated with the smoke exhaust passage.

During actual use, secondary air can enter a secondary air channel through the air inlet 402 and is discharged to the burner through the air outlet 304-a to participate in combustion, high-temperature flue gas can be formed after combustion, heat exchange occurs to secondary air of the high-temperature flue gas, the secondary air enters a combustion area again after being preheated, and the temperature of the high-temperature flue gas discharged after heat exchange is reduced, so that on one hand, fuel combustion can be promoted completely, combustion efficiency is improved, on the other hand, the temperature of discharged flue gas can be reduced, so that the loss of discharged flue gas is reduced, combustion efficiency can be further improved, air can smoothly enter a combustion chamber to be contacted with the combustion plate 20 to supplement oxygen for combustion, heat dissipation can be better avoided, and the device has good practical value.

In summary, compared with the prior art, the utility model has the following advantages:

1. The secondary air channel provided by the utility model can supplement sufficient air for the combustion plate 20, is beneficial to more complete combustion of fuel gas, and thus improves the heat efficiency and reduces the emission index.

2. The secondary air channel is arranged below the smoke discharging channel, and when oxygen is provided for the combustion of the burner, external air enters the inner side of the outer fire cover 30 from the air outlet 304-a of the secondary air channel to drive high-temperature smoke to flow, so that the high-temperature smoke can be effectively discharged from the smoke discharging channel.

3. The fire cover seat 40 provided by the utility model is arranged above the liquid bearing disc 50, and a proper gap is reserved between the fire cover seat and the liquid bearing disc, so that the installation is convenient, and the secondary air supplement can be ensured.

The foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited to the above-mentioned embodiment, but is not limited to the above-mentioned embodiment, and any simple modification, equivalent change and modification made by the technical matter of the present utility model can be further combined or replaced by the equivalent embodiment without departing from the scope of the technical solution of the present utility model.

Claims (10)

1. A burner comprising a fire cover seat (40) and an outer fire cover (30) arranged on the fire cover seat (40), characterized by also comprising a secondary air channel;

the outer fire cover (30) is matched with the fire cover seat (40) to define an outer ring airflow channel (702);

Air inlets (402) are formed in the fire cover seat (40) at intervals, air outlets (304-a) are correspondingly formed in the outer fire cover (30), and the air inlets (402) are connected with the air outlets (304-a) to form a secondary air channel.

2. A burner according to claim 1, wherein the air inlet (402) and the air outlet (304-a) are connected by an annular wall provided in the outer annular air flow passage (702), the secondary air passage being provided adjacent to the inner ring of the outer fire cover (30) at least two in the circumferential direction and spaced from the outer ring of the outer fire cover (30).

3. A burner according to claim 2, characterized in that the inner ring of the outer fire cover (30) is provided with a mounting seat (316-f), the annular wall being connected to a side wall (316-d) of the mounting seat (316-f), a part of the side wall (316-d) of the mounting seat (316-f) being a part of the annular wall of the secondary air channel.

4. A burner according to claim 3, wherein the annular wall comprises a side annular wall (304-1) and a connecting wall (304-2), both ends of the side annular wall (304-1) being connected to the connecting wall (304-2), respectively, and the annular wall being connected to a first annular wall (314) of the inner ring of the outer fire cover (30) which is obliquely arranged.

5. A burner according to claim 4, wherein the side annular wall (304-1) is arranged at the outer edge of the first annular wall (314) and concentric with the first annular wall (314), the side annular wall (304-1) being arranged parallel to the side wall (316-d) of the mounting seat (316-f).

6. A burner according to claim 2, wherein the air inlet (402) is provided at the lower end of the secondary air passage, the air inlet (402) being fan-shaped and circumferentially spaced on the burner cap base (40); the air outlet (304-a) is arranged at the upper end of the secondary air channel, and the air outlet (304-a) is fan-shaped and arranged on the outer fire cover (30) at intervals along the circumferential direction.

7. The burner according to claim 6, further comprising a combustion plate (20), said combustion plate (20) being disposed inside a mounting seat (316-f), a plurality of said secondary air passages being disposed at intervals around the periphery of the mounting seat (316-f) supporting said combustion plate (20);

The air outlet (304-a) is spaced in height from a mounting seat (316-f) supporting the combustion plate (20).

8. A burner according to claim 7, wherein the secondary air passage is a variable cross-section passage, and the air outlet (304-a) of the secondary air passage is located at a gradually decreasing height in a direction approaching the burner plate (20).

9. A burner according to claim 1, further comprising a liquid tray (50), wherein the fire cover base (40) is disposed above the liquid tray (50) with a height interval therebetween, and wherein the secondary air passage communicates with the outside through a gap between the air inlet (402) and the liquid tray (50).

10. The burner according to claim 9, further comprising a burner (70), wherein the liquid-bearing plate (50) is sleeved on the outer wall of the burner (70), and the fire cover seat (40) is embedded inside the burner (70) through a third boss (410) protruding towards the liquid-bearing plate (50).