CN217685002U - Fire lid and combustor - Google Patents

Abstract

The application relates to the technical field of kitchen equipment, discloses a fire lid, includes: the top wall is annular; the outer side plate is connected with the outer edge of the top wall and is positioned below the top wall; the interior plate is connected with the inward flange of roof to be located the below of roof, be provided with interior fire hole, interior fire hole includes first fire hole and sets up in the second fire hole of first fire hole both sides, and the aperture in second fire hole is less than the aperture in first fire hole. This application fire lid's interior fire hole is provided with first fire hole and sets up in the second fire hole of first fire hole both sides to the aperture that restricts second fire hole is less than first fire hole, and like this, when air-fuel mixture flows out and burns from first fire hole and second fire hole, the flame in second fire hole can carry out steady flame to the flame in first fire hole, it is more stable to make air-fuel mixture cover the burning at the fire, and air-fuel mixture can fully burn, prevent from the production of flame phenomenon. The present application further discloses a burner.

Description

Fire lid and combustor

Technical Field

The application relates to the technical field of kitchen equipment, for example to a fire cover and a combustor.

Background

The main structure of the air-fuel gas mixture cooker comprises a cooker surface, a fire cover, a burner, a cooker frame, a valve body, a control component, a pipeline and the like. Among them, the fire cover is a portion of the burner where the upper end temperature is the highest, and is also called a distributor.

In the related art, the fire cover mostly comprises a central fire cover and an outer ring fire cover, the central fire cover and the outer ring fire cover are independent parts, an inner fire hole is formed in the central fire cover, an outer fire hole is formed in the outer ring fire cover, and the structure is complex. The air-fuel mixture is firstly mixed with air in the furnace end and then is respectively conveyed to the inner fire hole and the outer fire hole. The inner fire hole is close to the igniter and is an important part for the ignition of the stove.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art: after the air-fuel mixture flows out from the inner fire hole of the fire cover, the combustion stability is poor.

SUMMERY OF THE UTILITY MODEL

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended to be a prelude to the more detailed description that is presented later.

The embodiment of the disclosure provides a fire cover and a burner, and flame formed after air-fuel mixture flows out from an inner fire hole can be stably burnt.

The disclosed embodiment provides a fire lid, including:

the top wall is annular;

the outer side plate is connected with the outer edge of the top wall and is positioned below the top wall;

the interior plate is connected with the inward flange of roof to be located the below of roof, be provided with interior fire hole, interior fire hole includes first fire hole and sets up in the second fire hole of first fire hole both sides, and the aperture in second fire hole is less than the aperture in first fire hole.

In some embodiments, the inner fire holes are plural in number and spaced apart along the inner decking.

In some embodiments, a flow guide groove is arranged between adjacent inner fire holes.

In some embodiments, the spacing between adjacent inner fire holes is greater than the spacing between adjacent first and second fire holes.

In some embodiments, the first fire holes and the second fire holes are spaced apart by 0.5mm to 1.5mm.

In some embodiments, the ports of the inner fire holes extend in a direction from the outer plate to the inner plate and are inclined upwardly.

In some embodiments, the inner decking is further provided with a firing aperture comprising:

a third fire hole;

the fourth fire holes are arranged on two sides of the third fire hole, and the aperture of the fourth fire hole is smaller than that of the third fire hole;

and the fifth fire hole is arranged corresponding to the area between the third fire hole and the fourth fire hole.

In some embodiments, the inner side plate is further provided with a flame holder, which is disposed opposite to the ignition hole.

In some embodiments, the flame holding portion comprises:

a main hole;

the secondary holes are arranged on two sides of the main hole, and the aperture of each secondary hole is smaller than that of the main hole;

and the auxiliary hole is arranged corresponding to the area between the main hole and the auxiliary hole.

The disclosed embodiment also provides a burner, including:

a fire cover as provided in any preceding embodiment;

the furnace end is arranged below the fire cover.

The fire cover and the burner provided by the embodiment of the disclosure can realize the following technical effects: this application fire lid's interior fire hole is provided with first fire hole and sets up in the second fire hole of first fire hole both sides to the aperture that restricts second fire hole is less than first fire hole, and like this, when air-fuel mixture flows out and burns from first fire hole and second fire hole, the flame in second fire hole can carry out steady flame to the flame in first fire hole, it is more stable to make air-fuel mixture cover the burning at the fire, and air-fuel mixture can fully burn, prevent from the production of flame phenomenon.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:

FIG. 1 is a schematic view of a fire lid according to an embodiment of the present disclosure;

FIG. 2 is an enlarged view of section C of FIG. 1;

FIG. 3 is an enlarged view of portion A of FIG. 1;

FIG. 4 is a schematic structural view of another fire cover provided by the disclosed embodiment;

FIG. 5 is an enlarged view of section D of FIG. 4;

FIG. 6 is a schematic view of a combustor according to an embodiment of the present disclosure.

Reference numerals:

10. a furnace end; 40. a fire cover; 410. a top wall; 420. an inner side plate; 430. an outer panel; 450. an outer fire hole; 460. an inner fire hole; 4601. a first fire hole; 4602. a second fire hole; 50. a diversion trench; 470. an ignition hole; 4701. a third fire hole; 4702. a fourth fire hole; 4703. a fifth fire hole; 480. a flame stabilizing section; 4801. a main hole; 4802. a secondary hole; 4803. and (5) auxiliary holes.

Detailed Description

So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other cases, well-known structures and tanks may simplify the illustration, to simplify the drawings.

The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the disclosed embodiments and embodiments thereof, and are not intended to limit the indicated tanks, elements or components to a particular orientation or to be constructed and operated in a particular orientation. Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the embodiments of the present disclosure may be understood as specific cases by those of ordinary skill in the art.

In addition, the terms "disposed," "connected," and "secured" are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; either directly or indirectly through an intermediary, or internal communication between two tanks, elements or components. Specific meanings of the above terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art according to specific situations.

The term "plurality" means two or more unless otherwise specified.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

As shown in fig. 1 and 2, the present disclosure provides a fire lid 40, including: a top wall 410, an outer side plate 430 and an inner side plate 420, wherein the top wall 410 is circular; the outer panel 430 is connected to the outer edge of the top wall 410 and is located below the top wall 410; the inner side plate 420 is connected to an inner edge of the top wall 410, and is positioned below the top wall 410, and is provided with inner fire holes 460, the inner fire holes 460 including first fire holes 4601 and second fire holes 4602 positioned at both sides of the first fire holes 4601, and the diameter of the second fire holes 4602 is smaller than that of the first fire holes 4601.

The inner fire hole 460 of the fire cover 40 provided in the embodiment of the present disclosure is provided with the first fire holes 4601 and the second fire holes 4602 disposed at both sides of the first fire holes 4601, and the aperture of the second fire holes 4602 is limited to be smaller than that of the first fire holes 4601, so that when the air-fuel mixture flows out from the first fire holes 4601 and the second fire holes 4602 and is combusted, the flames of the second fire holes 4602 can stabilize the flames of the first fire holes 4601, so that the air-fuel mixture is combusted more stably on the fire cover 40, and the air-fuel mixture can be sufficiently combusted, thereby preventing the occurrence of a flame-out phenomenon.

In the embodiment of the present disclosure, the diameter of the first fire holes 4601 is larger than that of the second fire holes 4602, and the flow rate of the air-fuel mixture flowing out of the first fire holes 4601 is larger than that of the air-fuel mixture flowing out of the second fire holes 4602, so that the intensity of flames formed by the combustion of the air-fuel mixture at the first fire holes 4601 can be larger than that of flames at the second fire holes 4602. Thus, when the flames are burned on the fire cover 40, the flames formed by the first fire holes 4601 may be mainly heated, and the flames of the second fire holes 4602 stabilize the flames of the first fire holes 4601 while achieving a heating effect.

The fire cover 40 provided by the embodiment of the disclosure has the top wall 410 connected between the inner side plate 420 and the outer side plate 430, the inner side plate 420 is provided with the inner fire holes 460, and the outer side plate 430 is provided with the outer fire holes 450, so that the inner side plate 420 and the outer side plate 430 form an integral structure, which is not an independent structure, and the inner fire cover 40 and the outer fire cover 40 are not distinguished, but form the integral fire cover 40. The integral fire cover 40 avoids excessive parts of the combustor, is more convenient to install and convenient to process, and saves the cost.

According to the fire cover 40 provided by the embodiment of the disclosure, the top wall 410, the inner side plate 420 and the outer side plate 430 enclose an annular gas mixing chamber, and after the fire cover 40 is installed in cooperation with the burner 10, the gas mixing chamber can be communicated with an air-fuel mixture flow channel of the burner 10. The gas mixing chamber of the fire cover 40 of the embodiment of the present disclosure communicates with the inner fire hole 460, and the air-fuel mixture flows to the gas mixing chamber through the air-fuel mixture flow passage and then flows out from the inner fire hole 460. In the case where outer panel 430 is provided with outer fire holes 450, the air-fuel mixture passes through the air-fuel mixture chamber and then flows out from inner fire holes 460 and outer fire holes 450.

In the present embodiment, the inner flame hole 460 is a through hole that penetrates the inner side plate 420, and allows the air-fuel mixture to flow out through the inner flame hole 460. The ports of the inner fire holes 460 located on the outer side of the inner side plate 420 are inlets, and the ports located on the inner side of the inner side plate 420 are outlets.

In this application, "inner" refers to the side near the center of the ring, and "outer" refers to the side away from the center of the ring.

In some embodiments, the inner fire apertures 460 are multiple in number and spaced along the inner decking 420. The inner fire holes 460 are distributed along the inner side plate 420, the inner side plate 420 is circular, and the plurality of inner fire holes 460 are also enclosed into a circular ring shape. The number of the inner fire holes 460 is plural, and here, the inner fire holes 460 can be considered as a group of holes including a group of fire holes, and each of the inner fire holes 460 includes a first fire hole 4601 and second fire holes 4602 disposed at both sides of the first fire hole 4601. The plurality of inner fire holes 460 are spaced apart from each other along the inner side plate 420, so that flames formed by the combustion of the air-fuel mixture can be uniformly distributed on the object to be heated, and the heating effect of the burner can be improved when the fire cover 40 is applied to the burner. The inner fire hole 460 is matched with the outer fire hole 450, so that the air-fuel mixture can be distributed more uniformly when being combusted on the fire cover 40, and the full heating of the pot body is facilitated.

Optionally, the inner fire apertures 460 are plural in number and equally spaced along the inner decking 420. The inner fire holes 460 are distributed at equal intervals, and when the air-fuel mixture flowing out of the inner fire holes 460 is combusted, formed flames can be uniformly distributed at the bottom of the pot, so that the pot body can be fully heated.

Alternatively, the inner plate 420 is circular and the plate surface is inclined with respect to the horizontal plane. Thus, the air-fuel mixture can flow obliquely upward or obliquely downward after flowing out from the inner flame hole 460, and the flame is gathered toward the center of the ring, which contributes to the formation of a flame uniformly distributed on the bottom of the pan.

In some embodiments, the interval between the adjacent inner fire holes 460 is greater than the interval between the adjacent first fire holes 4601 and second fire holes 4602. The inner fire holes 460 may be considered as a group of holes including a first fire hole 4601 and a second fire hole 4602, and a distance between the first fire hole 4601 and the second fire hole 4602 in one group of holes is smaller than a distance between adjacent groups of holes. Thus, the second fire holes 4602 of one inner fire hole 460 are prevented from interfering with the second fire holes 4602 of another adjacent inner fire hole 460, so that the first fire holes 4601 and the second fire holes 4602 in one inner fire hole 460 are stably matched with each other, and an effective flame stabilizing effect is achieved.

Optionally, the distance between the adjacent inner fire holes 460 is 3 to 4 times the distance between the adjacent second fire holes 4602 and the first fire holes 4601. Thus, the second fire holes 4602 can have an effective flame stabilizing effect on the first fire holes 4601.

In some embodiments, the distance between the first fire holes 4601 and the second fire holes 4602 is 0.5mm to 1.5mm. When the distance between the first fire holes 4601 and the second fire holes 4602 is within this range, the second fire holes 4602 can stabilize the flame of the first fire holes 4601, and the flame can be effectively prevented from leaving the flame or escaping the flame. If the distance between the first fire holes 4601 and the second fire holes 4602 is less than 0.5mm, the smoke is easily increased; if the distance between the first fire holes 4601 and the second fire holes 4602 is greater than 1.5mm, the second fire holes 4602 cannot stabilize the flame for the first fire holes 4601.

Alternatively, the interval between the first fire holes 4601 and the second fire holes 4602 is 0.5mm, and the interval between the adjacent inner fire holes 460 is 1.5mm or 2.0mm. Alternatively, the interval between the first fire holes 4601 and the second fire holes 4602 is 1.0mm, and the interval between the adjacent inner fire holes 460 is 3.0mm or 4.0mm.

In some embodiments, channels 50 are disposed between adjacent inner fire apertures 460. The utility model provides a be provided with guiding gutter 50 between fire hole 460 in fire lid 40's the adjacent that this disclosed embodiment provided, guiding gutter 50 can make impurity such as the hot water juice that falls into fire lid 40 upper surface, flow into the region that interior plate 420 encloses through guiding gutter 50 in, avoid impurity to block up interior fire hole 460. In practical application, after the fire cover 40 and the burner 10 are assembled, the guiding groove 50 can guide impurities such as soup to the surface of the inner side of the burner 10, so as to prevent the soup from blocking the inner fire hole 460 and avoid the problems of poor ignition and the like. In addition, because the inner fire holes 460 have a certain hole depth, a part of the material can be removed by arranging the guiding grooves 50 at the positions of the inner side plate 420 where the inner fire holes 460 are not arranged, so that the local thickness of the inner side plate 420 is reduced, the using amount is saved, and the production cost is reduced.

Optionally, the thickness of the inner side plate 420 where the baffle groove 50 is provided is 2.0mm. Thus, the inner side plate 420 has certain mechanical strength, the use requirement is met, and materials can be saved.

In some embodiments, the orifices of the inner fire apertures 460 extend in the direction of the outer side plate 430 to the inner side plate 420 and are angled upward. The fire lid 40 that this disclosed embodiment provided, the extending direction in interior fire hole 460's pore is from outer panel 430 to inner panel 420 direction, and tilt up, thus, air-fuel mixture flows along the direction from outer panel 430 to inner panel 420 in the pore of interior fire hole 460, and the top flows to the slope, after air-fuel mixture flows from interior fire hole 460, can flow towards the direction and the top of centre of a circle, can improve the heating effect between two parties of flame, compare ordinary interior fire lid 40 that leans out the fire hole can be faster improvement bottom of a boiler heating rate.

Optionally, the number of the inner fire holes 460 is multiple and is distributed at equal intervals along the inner side plate 420, the interval between the first fire holes 4601 and the second fire holes 4602 is 0.5mm to 1.5mm, the inner side plate 420 is circular and the plate surface is inclined with respect to the horizontal plane, and the duct of the inner fire holes 460 extends in the direction from the outer side plate 430 to the inner side plate 420 and is inclined upward. Thus, the inner fire holes 460 form circular ring-shaped flames which are inclined and gathered towards the direction of the circle center, the centered heating effect of the flames can be improved, and the heating speed of the pot bottom is increased.

As shown in connection with fig. 1 and 3, in some embodiments, the inner decking 420 is further provided with a firing aperture 470, the firing aperture 470 including: a third fire hole 4701, a fourth fire hole 4702 and a fifth fire hole 4703, wherein the fourth fire hole 4702 is disposed at both sides of the third fire hole 4701 and has a smaller diameter than the third fire hole 4701; the fifth fire holes 4703 are provided corresponding to the region between the third fire holes 4701 and the fourth fire holes 4702. The ignition hole 470 can improve the flame stabilizing effect by arranging a third fire hole 4701, a fourth fire hole 4702 and a fifth fire hole 4703, and has a great effect on improving the ignition stability and the thermocouple flame stabilizing performance under the ultrahigh pressure working condition such as 3 kpa.

Optionally, the third fire holes 4701 have a larger diameter than the fourth fire holes 4702 and the third fire holes 4701 have a larger diameter than the fifth fire holes 4703. The disclosed embodiment plays a main role of ignition with the third fire hole 4701, and the fourth fire hole 4702 and the fifth fire hole 4703 stabilize flames with respect to the third fire hole 4701.

Alternatively, the diameter of the third fire hole 4701 is the same as the diameter of the first fire hole 4601. The third fire holes 4701 may have the same size as the first fire holes 4601. Alternatively, the diameter of the fourth fire hole 4702 and the fifth fire hole 4703 may be the same as the diameter of the second fire hole 4602. Therefore, the flame stabilizing effect can be improved, and the ignition stability and the thermocouple flame stabilizing performance under the ultrahigh pressure working condition can be greatly improved.

As shown in fig. 4 and 5, in some embodiments, the inner plate 420 is further provided with a flame holder 480, and the flame holder 480 is disposed opposite to the ignition hole 470. The provision of the flame stabilizing portion 480 can further enhance the stabilizing effect on the flame.

As shown in connection with fig. 4 and 5, in some embodiments, the flame holder 480 includes: a main orifice 4801, a sub orifice 4802, and a sub orifice 4803, the sub orifice 4802 being disposed on both sides of the main orifice 4801 and having a smaller diameter than the main orifice 4801; the auxiliary orifice 4803 is disposed corresponding to an area between the main orifice 4801 and the sub orifice 4802. The flame stabilizing portion 480 has a strong flame stabilizing effect by being provided with the main hole 4801, the sub hole 4802 and the sub hole 4803 and being opposite to the ignition hole 470, and can further improve the flame stabilizing effect, and has a great effect on the ignition stability under an ultrahigh pressure and the thermocouple flame stabilizing performance.

Optionally, the pore size of the primary pores 4801 is larger than the pore size of the secondary pores 4802, and the pore size of the primary pores 4801 is larger than the pore size of the secondary pores 4803. Optionally, the secondary apertures 4802 and secondary apertures 4803 are the same pore size. Alternatively, the major aperture 4801 may have the same aperture size as the first fire holes 4601, and the minor apertures 4803 and 4802 may have the same aperture size as the second fire holes 4602. By adopting the aperture design of the embodiment of the disclosure, the ignition stability and the thermocouple stable ignition performance under ultrahigh pressure can be improved.

In some embodiments, the fire cover 40 includes: a top wall 410, an outer side plate 430 and an inner side plate 420, wherein the top wall 410 is circular; the outer panel 430 is connected to the outer edge of the top wall 410 and is located below the top wall 410; the inner side plate 420 is connected to an inner edge of the top wall 410, is positioned below the top wall 410, and is provided with inner fire holes 460, the inner fire holes 460 include first fire holes 4601 and second fire holes 4602 positioned at both sides of the first fire holes 4601, and the aperture of the second fire holes 4602 is smaller than that of the first fire holes 4601; the inner side plate 420 is further provided with a ignition hole 470 and a flame holder 480, and the ignition hole 470 includes: a third fire hole 4701, a fourth fire hole 4702 and a fifth fire hole 4703, wherein the fourth fire hole 4702 is disposed at both sides of the third fire hole 4701 and has a smaller diameter than the third fire hole 4701; the fifth fire holes 4703 are disposed corresponding to an area between the third fire holes 4701 and the fourth fire holes 4702; the flame holder 480 is disposed opposite to the ignition hole 470, and the flame holder 480 includes: a main orifice 4801, a sub orifice 4802, and a sub orifice 4803, the sub orifice 4802 being disposed on both sides of the main orifice 4801 and having a smaller diameter than the main orifice 4801; the auxiliary aperture 4803 is disposed corresponding to the region between the main aperture 4801 and the sub aperture 4802.

The second fire hole 4602 of the fire cover 40 of the embodiment of the present disclosure can stabilize flame for the first fire hole 4601, the ignition hole 470 is provided to stabilize flame for the third fire hole 4701 through the fourth fire hole 4702 and the fifth fire hole 4703, and is provided with the flame stabilizing portion 480 including the main hole 4801, the sub-hole 4802 and the sub-hole 4803, which can significantly improve the flame stabilizing effect of the fire cover 40, make the air-fuel mixture burn more stably on the fire cover 40, and the air-fuel mixture can burn sufficiently, prevent the generation of the flame leaving phenomenon, and have great effects on the ignition stability under the condition of improving the ultra-high pressure and the flame stabilizing performance of the thermocouple.

With reference to fig. 1, 2 and 6, an embodiment of the present disclosure further provides a burner, which includes a burner 10 and a fire cover 40 provided in any one of the foregoing embodiments, where the burner 10 is disposed below the fire cover 40. In the burner provided by the embodiment of the present disclosure, the inner fire hole 460 of the fire cover 40 is provided with the first fire hole 4601 and the second fire holes 4602 arranged at two sides of the first fire hole 4601, the aperture of the second fire hole 4602 is smaller than that of the first fire hole 4601, and the second fire hole 4602 can stabilize the flame of the first fire hole 4601, so that the air-fuel mixture is more stably combusted on the fire cover 40, and the air-fuel mixture can be sufficiently combusted, thereby preventing the occurrence of a flame-leaving phenomenon.

The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. A fire cover, comprising:

the top wall is annular;

the outer side plate is connected with the outer edge of the top wall and is positioned below the top wall;

the inner side plate is connected with the inner edge of the top wall, is positioned below the top wall and is provided with an inner fire hole, the inner fire hole comprises a first fire hole and second fire holes arranged on two sides of the first fire hole, and the aperture of each second fire hole is smaller than that of the first fire hole.

2. The fire cover of claim 1, wherein the number of the inner fire holes is plural and spaced along the inner side plate.

3. The fire cover of claim 2, wherein a flow guide groove is provided between adjacent inner fire holes.

4. The fire cover of claim 2, wherein a spacing between adjacent ones of the inner fire holes is greater than a spacing between adjacent ones of the first and second fire holes.

5. The fire cover of claim 1, wherein the distance between the first fire holes and the second fire holes is 0.5mm to 1.5mm.

6. The fire cover of claim 1, wherein the ports of the inner fire holes extend in a direction from the outer plate to the inner plate and are inclined upwardly.

7. The fire cover of any one of claims 1 to 6, wherein said inner side plate is further provided with a firing hole, said firing hole comprising:

a third fire hole;

the fourth fire holes are arranged on two sides of the third fire hole, and the aperture of the fourth fire hole is smaller than that of the third fire hole;

and the fifth fire hole is arranged corresponding to the area between the third fire hole and the fourth fire hole.

8. The fire cover according to claim 7, wherein the inner side plate is further provided with a flame holding part disposed opposite to the ignition hole.

9. The fire cover of claim 8, wherein the flame holding portion comprises:

a main hole;

the secondary holes are arranged on two sides of the main hole, and the aperture of each secondary hole is smaller than that of the main hole;

and the auxiliary hole is arranged corresponding to the area between the main hole and the secondary hole.

10. A burner, comprising:

a fire cover according to any one of claims 1 to 9;

the furnace end is arranged below the fire cover.

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