CN217978795U - Fire caps, burners and gas hobs - Google Patents

Abstract

The present application belongs to the technical field of electrical appliances, and specifically relates to a fire cover, a burner and a gas stove, aiming at at least to a certain extent solving the phenomenon of insufficient combustion of the inner ring fire hole, so as to improve the combustion efficiency of the gas stove. The fire cover includes a ring-shaped body, the inner ring wall of the body is provided with an inner ring fire hole, and a plurality of gas supply grooves are arranged at intervals on the inner ring wall. The setting of the air supply groove can make the air volume in the area of the inner ring fire hole sufficient, so that the inner ring fire hole can burn stably, so as to improve the phenomenon of insufficient combustion of the inner ring fire hole and reduce the generation of flue gas CO. To improve the combustion efficiency of the gas stove.

Description

Fire caps, burners and gas hobs

technical field

The application belongs to the technical field of electrical appliances, and in particular relates to a fire cover, a burner and a gas stove.

Background technique

The gas stove is mainly used for cooking. The fire cover of the gas stove is usually provided with an inner ring fire hole and an outer ring fire hole. The inner ring fire hole is set on the inner side of the outer ring fire hole. The amount of air in the area around the fire hole and the supplementary amount of air in the inner ring fire hole are insufficient, which will affect the combustion of the inner ring fire hole and affect the combustion efficiency of the gas stove.

Contents of the invention

In order to solve the above technical problems, the present application provides a fire cover, a burner and a gas stove, aiming at at least to a certain extent solving the phenomenon of insufficient combustion of the inner ring fire hole, so as to improve the combustion efficiency of the gas stove.

The technical scheme of this application is:

First of all, the application provides a fire cover, which is special in that the fire cover includes a ring-shaped body, the inner ring wall of the body is provided with an inner ring fire hole, and the inner ring wall is arranged at intervals There are a number of air supplement grooves for supplementing the air volume at the fire hole area of the inner ring.

In the fire cover provided by the application, since the fire cover includes a ring-shaped body, the inner ring wall of the body is provided with an inner ring fire hole, and a plurality of gas supply grooves are arranged at intervals on the inner ring wall. The setting of the groove can expand the space of the area where the inner ring fire hole is located, so as to increase the air storage capacity in the area where the inner ring fire hole is located, so that the air volume at the inner ring fire hole is sufficient, so that the inner ring fire hole can burn stably, Therefore, the phenomenon of insufficient combustion of the inner ring fire hole can be improved, the generation of smoke can be reduced, and the combustion efficiency of the gas stove can be improved.

In some embodiments, the inner ring wall of the body includes a first inner wall and a second inner wall, and the inner edge from the first inner wall to the top surface of the body extends obliquely downward toward the inside of the body, so The second inner wall is connected to the bottom of the first inner wall, and is inclined downward toward the inside of the body;

The inner ring fire holes are arranged on the first inner wall, and the air supply groove is arranged at the junction of the first inner wall and the second inner wall.

In some embodiments, the inner ring fire holes are provided in multiple groups, and the multiple groups of the inner ring fire holes are arranged at intervals, and more than one of the air supply grooves are arranged between adjacent inner ring fire holes , to balance the supplementary amount of air at the fire hole in the inner ring.

In some embodiments, the fire cap also includes:

A support, the body is disposed on the support, and the body is connected to the support to form an air mixing chamber.

In some embodiments, the support includes:

a support plate arranged below the body;

The first ring body is arranged on the support plate, and the inner ring wall of the body is supported by the first ring body;

The second ring body is arranged on the support plate, and the second ring body is arranged at intervals outside the first ring body, and the outer ring wall of the body is supported by the second ring body.

In some embodiments, more than one air inlet is provided on the support plate, and the air inlet is arranged between the first ring body and the second ring body. Through the air inlet, the The gas mixed with air is supplemented to the gas mixing chamber to further improve the combustion effect of the burner.

In some embodiments, the fire cover also includes a plurality of gas homogenizers, and a plurality of gas homogenizers are arranged in the gas mixing chamber, and the gas homogenizers are provided with a plurality of gas homogenization holes, and the gas homogenizers The parts are arranged correspondingly to the air inlets, and the air homogenizers are arranged above the corresponding air inlets. Through the uniform transition of the air uniform holes, the air can be replenished into the air mixing chamber in a relatively balanced manner.

In some embodiments, the gas homogenizer includes a gas homogenizer and two connecting plates, the gas homogenizer is arranged above the corresponding air inlet, and a plurality of the gas homogenizers are opened on the gas homogenizer , both sides of the gas distribution plate are connected to the first ring body and the second ring body through the two connecting plates.

In some embodiments, the material of the body is stainless steel, and the wall thickness of the body is 0.8-1.2 mm, which can reduce the production cost compared with the copper body.

In some embodiments, the outer ring fire hole and the inner ring fire hole on the body are circular holes, the fire outlet of the outer ring fire hole faces the outside of the body, and the inner ring fire hole The fire outlet faces the inside of the body.

In some embodiments, the inner ring fire holes are provided with four groups, and each group of the inner ring fire holes includes 3 to 9 inner ring fire holes, and the diameter of each inner ring fire hole is 1.2 ~1.5mm;

Two rows of outer ring fire holes are arranged on the outer ring wall of the body, and the diameter of the outer ring fire holes is 1.4-1.6mm;

The volume of the air mixing chamber of the fire cover is 1.6x10 ⁵ +/-5%mm ³ .

Secondly, the present application also provides a burner, which includes the above-mentioned fire cover.

The burner with the above-mentioned fire cover can expand the space of the area where the inner ring fire hole is located by setting the gas supply groove on the inner ring wall of the fire cover, so as to improve the location of the inner ring fire hole. Increase the air storage capacity in the area, so that the air volume at the fire hole in the inner ring is sufficient, and the combustion at the fire hole in the inner ring is stable, thereby improving the insufficient combustion of the fire hole in the inner ring, reducing the generation of smoke, and improving the gas stove combustion efficiency.

Finally, the present application also provides a gas stove, which includes the above-mentioned burner.

For the gas stove with the above-mentioned burner, the gas supply groove can be arranged on the inner ring wall of the fire cover of the burner. The amount of air storage in the area where the hole is located, so that the air volume at the inner ring fire hole is sufficient, so that the inner ring fire hole burns stably, so that the phenomenon of insufficient combustion of the inner ring fire hole can be improved, and the generation of smoke can be reduced. Improve the combustion efficiency of gas stoves.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

In the attached picture:

Fig. 1 is the structural representation of the fire cover of the embodiment of the present application;

Fig. 2 is the explosion diagram of Fig. 1;

Fig. 3 is a schematic cross-sectional view of Fig. 1;

FIG. 4 is a schematic cross-sectional view of FIG. 1 .

Reference signs:

Body-100, inner ring wall-110, inner ring fire hole-111, air supply groove-112, first inner wall-113, second inner wall-114, third inner wall-115, outer ring wall-120, first Outer wall-121, second outer wall-122, third outer wall-123, outer ring fire hole-124;

Support piece-200, support plate-210, first ring body-220, second ring body-230, third ring body-240, vent hole-250, connecting arm-260, air inlet-270, air inlet sleeve Barrel 280;

Gas uniform piece-300, gas uniform hole-310, gas uniform plate-320, connecting plate-330.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative positional relationship and movement conditions among the components in a specific posture. If the specific posture changes, the directional indication also changed accordingly.

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

Describe the application below in conjunction with accompanying drawing and with reference to specific embodiment:

The embodiment of the present application provides a fire cover, a burner and a gas stove, aiming at at least to a certain extent to solve the phenomenon of insufficient combustion of the inner ring fire hole, so as to improve the combustion efficiency of the gas stove

The fire cover provided in the embodiment of the present application can be applied to the burner in the embodiment of the present application, and the burner in the embodiment of the present application can be applied to the gas stove in the embodiment of the present application. Or in other words, the burner in the embodiment of the present application may include the fire cover in the embodiment of the application, and the gas stove in the embodiment of the present invention may include the burner in the embodiment of the present application.

FIG. 1 is a schematic structural view of a fire cap according to an embodiment of the present application, FIG. 2 is a schematic diagram of an explosion of FIG. 1 , and FIG. 3 is a schematic cross-sectional view of FIG. 1 . 1-3, the fire cover of the embodiment of the present application includes a body 100, the body 100 is annular, the inner ring wall 110 of the body 100 is provided with an inner ring fire hole 111, and the inner ring wall 110 is provided with a plurality of Air supply groove 112 for supplementing the air volume at the area of the inner ring fire hole 111 .

The fire cover provided in the embodiment of the present application, since the fire cover includes a ring-shaped body 100, the inner ring wall 110 of the body 100 is provided with an inner ring fire hole 111, and a plurality of inner ring walls 110 are arranged at intervals for replenishing the inner ring. The air supply groove 112 of the air volume at the area of the ring fire hole 111, the setting of the air supply groove 112 can expand the space of the area where the inner ring fire hole 111 is located, so as to increase the air storage capacity of the area where the inner ring fire hole 111 is located , so that the air volume at the inner ring fire hole 111 is sufficient, so that the inner ring fire hole 111 can burn stably, thereby improving the phenomenon of insufficient combustion of the inner ring fire hole 111, reducing the generation of smoke, and improving the combustion of the gas stove efficiency.

1-3, the top surface of the body 100 of the embodiment of the present application can be a horizontal plane, and its inner ring wall 110 includes a first inner wall 113 and a second inner wall 114, the first inner wall 113 reaches the inner edge of the top surface of the body 100 The second inner wall 114 is connected to the bottom of the first inner wall 113 and extends obliquely downward toward the inside of the main body 100 . In the embodiment of the present application, the first inner wall 113 and the second inner wall 114 can be sequentially formed on the inner side of the body 100, the inner ring fire hole 111 is arranged on the first inner wall 113, and the air supply groove 112 can be arranged on the first inner wall 113 and the second inner wall 113. The junction of the two inner walls 114 , that is, the top of the air supply groove 112 is set on the first inner wall 113 , and the bottom of the air supply groove 112 is set on the second inner wall 114 .

The air supply groove 112 in the embodiment of the present application is a depression extending toward the bottom of the main body 100, and its projection on the horizontal plane can be roughly square, with a volume of about 1.2mm ³ and a thickness of about 4-6mm. The size parameters of the groove 112 can also be adjusted adaptively according to the size of the body 100 , which is not limited in this embodiment of the present application.

1-3, the embodiment of the present application is provided with multiple sets of inner ring fire holes 111, and multiple sets of inner ring fire holes 111 are arranged at intervals. Groove 112, to equalize the supplementary amount of air at the fire hole 111 of the inner ring.

Specifically, in the embodiment of the present application, four groups of inner ring fire holes 111 are arranged at intervals around the central axis of the body 100, and an air supply groove 112 is arranged between two adjacent groups of inner ring fire holes 111, through which the air supply The groove 112 can supply air to the two adjacent air supply grooves 112 in a balanced manner, so as to improve the combustion efficiency of the gas stove. Of course, in other embodiments, the inner ring fire holes 111 can also be provided with other numbers of components, such as two groups, three groups, etc., and there can be two or more groups between adjacent two groups of inner ring fire holes 111 The greater number of air supply grooves 112 is not limited in this embodiment of the present application.

In the embodiment of the present application, the inner ring fire hole 111 is drilled along the top surface perpendicular to the first inner wall 113 by a drilling tool. The inner ring fire hole 111 has an inclination angle of 20-80°. Preferably, the inner ring fire hole 111 The inclination angle is 30°.

In the embodiment of the present application, each group of inner ring fire holes 111 includes 3 to 8 inner ring fire holes 111, and the 3 to 8 inner ring fire holes 111 can be arranged in two rows, and each inner ring fire hole 111 can be It is circular, and the diameter of each inner ring fire hole 111 may be 1.2-1.5mm, and the fire outlet end of the inner ring fire hole 111 may face the inside of the main body 100 . The circular inner ring fire hole 111 can increase the contact points between the inner ring flame generated at the inner ring fire hole 111 and the cooking utensil, and further improve the heating efficiency of the cooking utensil.

Referring to Figures 1-3, the inner ring wall 110 of the fire cover in the embodiment of the present application also includes a third inner wall 115, which can be integrally connected to the bottom of the second inner wall 114, and extends vertically downward .

1-3, the outer ring wall 120 of the fire cover of the embodiment of the present application includes a first outer wall 121, a second outer wall 122 and a third outer wall 123, and the outer edge of the first outer wall 121 to the top surface of the body 100 faces toward the body. The exterior of 100 extends obliquely downward, the second outer wall 122 is connected to the bottom of the first inner wall 113, and extends obliquely downward toward the outside of the body 100, and the third outer wall 123 is connected to the bottom of the second outer wall 122, and vertically Extend settings down. In the embodiment of the present application, the first outer wall 121 , the second outer wall 122 and the third outer wall 123 can be integrally formed on the outer side of the body 100 in turn, and the first inner wall 113 is provided with an outer ring fire hole 124 .

The outer ring fire holes 124 implemented in the present application can be provided with two rows, and the number of the two rows of outer ring fire holes 124 can be equal to 180 in total. The fire outlet of each outer ring fire hole 124 can face the outside of the body 100, Moreover, each outer ring fire hole 124 may be circular, and the diameter of each outer ring fire hole 124 may be 1.4-1.6 mm. The circular outer ring fire hole 124 can increase the contact points between the outer ring flame generated at the outer ring fire hole 124 and the cooking utensil, which can further improve the heating efficiency of the cooking utensil.

In the embodiment of the present application, the outer ring fire hole 124 is also drilled along the top surface perpendicular to the outer inner wall by a drilling tool. The outer ring fire hole 124 has an inclination angle of 20-60°. Preferably, the outer ring fire hole 111 The inclination angle is 30°.

In the embodiment of the present application, since the fire outlet end of the inner ring fire hole 111 faces the outside of the body 100, the fire outlet end of the outer ring fire hole 124 can face the outside of the body 100, and both the inner ring fire hole 111 and the outer ring fire hole 124 are set There are two rows, which, when actually used, create four rings of flame for a more even heating of the cooking utensil.

1-3 , the fire cap of the embodiment of the present application further includes a support 200 on which the body 100 of the fire cap is arranged, and the body 100 and the support 200 are connected to form an air mixing chamber.

FIG. 4 is a schematic cross-sectional view of FIG. 1. With reference to FIGS. 1-4 , the support member 200 of the embodiment of the present application includes a support plate 210, a first ring body 220 and a second ring body 230, and the support plate 210 is arranged under the body 100. , can be placed on the stove, the first ring body 220 and the second ring body 230 are set on the support plate 210, the inner ring wall 110 of the body 100 is supported by the first ring body 220, and the second ring body 230 is arranged at intervals Outside the first ring body 220 , the outer ring wall 120 of the body 100 is supported by the second ring body 230 , and the body 100 , the first ring body 220 , the second ring body 230 and the support plate 210 enclose an air mixing chamber.

Specifically, the inner ring wall 110 (third inner wall 115) of the body 100 in the embodiment of the present application can be riveted on the inner side of the first ring body 220 by means of interference fit, and the outer ring wall 120 (third outer wall 123) of the body 100 ) can be riveted on the outside of the second ring body 230 by means of interference fit,

Further, with reference to FIGS. 1-3 , in the embodiment of the present application, a vent hole 250 is provided in the middle of the support plate 210, and a third ring body 240 is provided in the vent hole 250. The third ring body 240, the first ring body 220 And the second ring body 230 can be coaxially arranged, and the outer peripheral surface of the third ring body 240 and the outer peripheral surface of the first ring body 220 can be connected by a plurality of connecting arms 260, and the plurality of connecting arms 260 can surround the third ring body The central axes of the rings 240 are arranged at intervals to realize the connection between the third ring body 240 and the first ring body 220 .

Air can enter the inner ring of the main body 100 of the fire cover through the middle part of the third ring body 240 , the gap between the third ring body 240 and the first ring body 220 , to supplement the air used by the inner ring fire hole 111 for combustion.

1-4, more than one air inlet 270 may be provided on the support plate 210 of the embodiment of the present application, and the air inlet 270 is arranged between the first ring body 220 and the second ring body 230, through which The gas port 270 can replenish gas mixed with air to the gas mixing chamber, and the gas is output and burned through the outer ring fire hole 124 and the inner ring fire hole 111 .

Further, with reference to FIG. 3 and FIG. 4 , in the embodiment of the present application, an air inlet sleeve 280 may be provided in the air inlet 270 , and the air inlet sleeve 280 is used to connect with the burner head of the burner.

With reference to Fig. 1-Fig. 4, the fire cover of the embodiment of the present application also includes more than one gas uniform part 300, and the gas uniform part 300 is arranged in the gas mixing chamber, and the gas uniform part 300 is provided with a plurality of gas uniform holes 310, and the gas uniform holes 310 The area is about 100mm ² , and the gas homogenizer 300 and the air inlet 270 are correspondingly arranged. The gas homogenizer 300 is arranged above the corresponding air inlet 270 . The speed of the cavity can also be uniformly transitioned through the uniform air hole 310, so that the air can be replenished into the air-mixing cavity in a relatively balanced manner, and distributed to the inner ring fire hole or the outer ring fire hole for combustion.

Referring to Fig. 2, the gas homogenizer 300 of the embodiment of the present application includes a gas homogenizer 320 and two connecting plates 330, the gas homogenizer 320 is arranged above the corresponding air inlet 270, and a plurality of gas homogenizers 310 are provided on the gas homogenizer 320 , both sides of the gas homogenizer 320 are connected to the first ring body 220 and the second ring body 230 through two connecting plates 330 , so as to realize the fixing of the gas homogenizer 300 in the gas mixing chamber.

Specifically, each component that constitutes the gas uniform member 300 of the embodiment of the present application is preferably integrally formed, and only one air inlet 270 on the support plate 210 is provided, and the air inlet 270 on the support plate 210 is the same as the furnace head of the burner. Correspondingly, the gas homogenizer 300 is also provided with one, the gas mixed with air discharged from the burner burner is introduced into the gas mixing chamber through the air inlet 270 on the support plate 210, and through the gas mixing chamber After the uniform transition of the gas homogenizer 300, it is distributed to the outer ring fire hole 124 and the inner ring fire hole 111 of the fire cover for combustion.

In other embodiments, multiple air inlets 270 on the support plate 210 can be provided, and multiple air inlets 270 can be connected with the burner head through the distribution cavity, and the gas discharged from the burner head is mixed with The gas of the air can be introduced into the air mixing chamber through the distribution chamber and enter the air inlet 270 on the support plate 210 at the same time, and then distributed to the outer ring fire hole 124 and the inner ring fire hole 111 of the fire cover for combustion. The balance of gas introduction can be further improved.

In the prior art, the body 100 of the fire cover is mostly formed by forging copper metal, and then the fire hole is made by drilling, which will make the processing cost of the body 100 of the fire cover more expensive.

Based on this, in the embodiment of the present application, the material of the main body 100 is selected as stainless steel. Compared with the copper main body 100, not only the production cost can be reduced, but also the fire hole can be formed more easily.

Further, the wall thickness of the main body 100 in the embodiment of the present application can be thin, and the specific size can be 0.8-1.2 mm, and the volume of the gas mixing chamber of the fire cover can be 1.6x10 ⁵ +/-5% mm ³ , when the matching When the arrangement of the outer ring fire holes 124 and the inner ring fire holes 111 is arranged, it can ensure that the gas and air are fully supplemented, so as to achieve high energy-efficient combustion efficiency; in addition, it can also ensure that the flow rate of the gas will not be too fast, so that Make the combustion more complete and avoid the occurrence of combustion backfire; in addition, through the setting of the gas uniform member 300, when the mixed gas can be evenly dispersed inside the cavity, the flow rate of the gas can be kept consistent with the amount of gas required for combustion. Consistent, so as to ensure that when the gas stove is burning or the gas is turned off, the gas will not explode due to the residual gas inside the cavity.

The burner with the above-mentioned fire cover and the gas stove including the burner can make the air volume at the inner ring fire hole 111 sufficient, so that the inner ring fire hole 111 can burn stably, thereby improving the combustion of the inner ring fire hole 111 Insufficient phenomenon can reduce the generation of CO in flue gas. In addition, it can also avoid the occurrence of combustion tempering phenomenon and explosion phenomenon, so as to improve the combustion efficiency of gas stoves, which has very good practical value.

In this application, unless otherwise clearly specified and limited, the terms "connection" and "fixation" should be interpreted in a broad sense, for example, "fixation" can be a fixed connection, a detachable connection, or an integral body; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be an internal communication between two elements or an interaction relationship between two elements, unless otherwise clearly defined. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation indicated by rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as limiting the application.

In addition, descriptions such as "first", "second" and so on in this application are only for description purposes, and should not be understood as indicating or implying their relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, the technical solutions of the various embodiments can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist , nor within the scope of protection required by the present application.

In the description of the present application, unless otherwise clearly specified and limited, a first feature being “on” or “below” a second feature may include that the first and second features are in direct contact, and may also include that the first and second features are in direct contact. Two features are not in direct contact but through another feature between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

In the description of this specification, descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

While preferred embodiments of the present application have been described, additional changes and modifications to these embodiments can be made by those of ordinary skill in the art once the basic inventive concept is appreciated. Therefore, it is intended that the appended claims be interpreted to cover the preferred embodiment and all changes and modifications that fall within the scope of the application.

Obviously, those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims (12)

1. The fire cover is characterized by comprising an annular body, wherein an inner annular fire hole is formed in the inner annular wall of the body, and a plurality of air supply grooves are formed in the inner annular wall at intervals;

the inner annular wall of the body comprises a first inner wall and a second inner wall, the inner side edge from the first inner wall to the top surface of the body extends obliquely and downwards towards the inside of the body, and the second inner wall is connected to the bottom of the first inner wall and extends obliquely and downwards towards the inside of the body;

the inner ring fire hole is formed in the first inner wall, and the air supply groove is formed in the joint of the first inner wall and the second inner wall.

2. The fire cover of claim 1, wherein the inner ring fire holes are provided with a plurality of groups, the inner ring fire holes are arranged at intervals, and more than one air supply groove is arranged between the adjacent inner ring fire holes.

3. The fire lid of any one of claims 1-2, further comprising:

the body is arranged on the supporting piece, and the body is connected with the supporting piece to form a mixed air cavity.

4. The fire cover of claim 3, wherein the support comprises:

the supporting plate is arranged below the body;

the first ring body is arranged on the supporting plate, and the inner ring wall of the body is supported by the first ring body;

the second ring body is arranged on the supporting plate, the second ring body is arranged on the outer side of the first ring body at intervals, and the outer ring wall of the body is supported by the second ring body.

5. The fire cover of claim 4, wherein the support plate is provided with one or more air inlets disposed between the first ring body and the second ring body.

6. The fire cover according to claim 5, further comprising at least one air homogenizing member disposed in the air mixing chamber, wherein the air homogenizing member is provided with a plurality of air homogenizing holes, the air homogenizing member is disposed corresponding to the air inlet, and the air homogenizing member is disposed above the corresponding air inlet.

7. The fire cover according to claim 6, wherein the gas distributing member comprises a gas distributing plate and two connecting plates, the gas distributing plate is arranged above the corresponding gas inlet, a plurality of gas distributing holes are formed in the gas distributing plate, and two sides of the gas distributing plate are connected with the first ring body and the second ring body through the two connecting plates.

8. The fire cover according to any one of claims 1-2 and 4-7, wherein the body is made of stainless steel, and the wall thickness of the body is 0.8-1.2 mm.

9. The fire cover according to claim 8, wherein the outer ring fire holes and the inner ring fire holes are circular holes, the fire outlet direction of the outer ring fire holes faces the outside of the body, and the fire outlet direction of the inner ring fire holes faces the inside of the body.

10. The fire cover according to claim 9, wherein the inner fire holes are provided in four groups, each group of the inner fire holes comprises 3 to 9 inner fire holes, and the diameter of each inner fire hole is 1.2 to 1.5mm;

two rows of outer ring fire holes are arranged on the outer ring wall of the body, and the aperture of each outer ring fire hole is 1.4-1.6 mm;

the volume of the gas mixing cavity of the fire cover is 1.6x10 ⁵ +/-5％mm ³ 。

11. A burner comprising a fire cover according to any one of claims 1 to 10.

12. A gas burner characterized in that it comprises a burner according to claim 11.

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