Small flame cover and burner with the same

Abstract

The present invention provides a small fire cover and a burner having the small fire cover. The small fire cover includes a main body, which includes a top wall, a side wall and a gas channel. A circle of main fire holes is provided on the side wall. The side wall includes an inner wall and an outer wall. The top wall and the inner wall enclose the gas channel, and the main fire hole connects the gas channel with the outside. The length of the inner wall is greater than the length of the outer wall, and the inner wall, the top wall and the outer wall enclose an annular groove connecting the main fire hole with the outside. The annular groove divides the main fire hole into a first hole section located on the inner wall and a second hole section located on the outer wall. The inner wall is provided with a circle of inner flame-stabilizing holes connecting the gas channel and the annular groove above the first hole section. Based on the annular groove and the inner flame-stabilizing holes, the present invention can not only accumulate and burn the fuel gas in the annular groove, thereby achieving the effect of quickly heating the blocked main fire hole and quickly clearing the blockage, but also achieve a flame stabilizing effect.

Description

Technical Field

[0001] The present invention relates to the technical field of household gas stoves, in particular to a low-fire cover and a burner with the low-fire cover. Background Art

[0002] Gas stoves are widely used as kitchen appliances, but problems such as low flame, lack of gas, and blockage are common. Especially during long-term use, due to overflowing pots, splashing of oil-water mixtures, etc., it is more likely to cause the fire cover and fire holes to be blocked, affecting the use of the stove.

[0003] When the fire hole of the existing fire cover is blocked by oil stains, it often takes a lot of time to manually unclog it. Once it is used for a long time without being unclogged, the stove will not be able to ignite, and the fire cover will have to be replaced. Summary of the Invention

[0004] The main purpose of the present invention is to provide a small fire cover to solve the problem in the prior art that the fire hole of the fire cover is blocked by oil stains and the like, which requires manual work that takes a lot of time to clear.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a small fire cover, including a main body, the main body including a top wall, a side wall and a gas channel, a circle of main fire holes is provided on the side wall, the side wall includes an inner wall and an outer wall, the top wall and the inner wall are combined to form the gas channel, and the main fire hole connects the gas channel with the outside; the length of the inner wall is greater than the length of the outer wall, and the inner wall, the top wall and the outer wall are combined to form an annular groove connecting the main fire hole with the outside, and the annular groove divides the main fire hole into a first hole section located on the inner wall and a second hole section located on the outer wall; the inner wall is provided with a circle of inner flame stabilizing holes connecting the gas channel and the annular groove above the first hole section.

[0006] The above-mentioned small fire cover is based on the setting of the annular groove and the inner flame-stabilizing hole. On the one hand, when the gas passes through the main fire hole and the inner flame-stabilizing hole through the annular groove, most of the gas in the inner flame-stabilizing hole accumulates in the annular groove and burns in the annular groove, which can make the oil-water mixture blocked in the main fire hole evaporate as soon as possible to keep the main fire hole unobstructed, so that there is no need to spend a lot of time manually to clear the blocked fire holes, and it can also reduce the cost of replacing the fire cover due to fire hole blockage; on the other hand, a part of the gas stored in the annular groove will flow out from the bottom of the annular groove and be ignited by those main fire holes that can still burn normally, forming a small flame-stabilizing ring, pulling the flame of the main fire hole above, and preventing the flame of the main fire hole from leaving the flame due to the fast gas flow rate, thereby achieving a flame stabilizing effect.

[0007] Exemplarily, the outer side wall has a first outer side surface, a first inner side surface, and a first bottom end surface, wherein the first bottom end surface is connected between the first outer side surface and the first inner side surface and away from the top wall; the inner side wall has a second outer side surface, a second inner side surface, and a second bottom end surface, wherein the second bottom end surface is connected between the second outer side surface and the second inner side surface and away from the top wall; the first bottom end surface is located above the second bottom end surface, and the distance between the first inner side surface and the second outer side surface forms the width a of the annular groove. In this way, the small fire cover as a whole has a cap edge shape, which is more conducive to a portion of the gas stored in the annular groove flowing out from the bottom of the annular groove and being ignited by the main fire holes that can still burn normally, thereby improving the flame stabilization effect. Exemplarily, the inner flame stabilization hole has a flame stabilization hole inlet located on the second inner side surface and a flame stabilization hole outlet located on the second outer side surface, and the inner flame stabilization hole is inclined upward along the direction from the flame stabilization hole inlet to the flame stabilization hole outlet. In this way, when the gas passes through the inner flame stabilizing hole, it is shot into the inside of the annular groove at a certain inclined angle instead of flowing directly to the outside, so that the gas can be accumulated quickly and stably in the annular groove, so that there is enough gas in the annular groove to be ignited and burn stably, thereby quickly clearing the blocked fire hole, making the gas burn more fully, and reducing the formation of yellow flames.

[0008] For example, the primary flame hole has a first hole inlet located on the second inner side surface and a primary flame hole outlet located on the first outer side surface. The primary flame hole is inclined upward from the first hole inlet to the primary flame hole outlet. This facilitates drilling the primary flame hole while ensuring a sufficient gas rate for providing the flame, thereby improving thermal efficiency.

[0009] For example, the main flame hole has a second hole entrance located on the first inner side surface, the second hole entrance has a first hole upper edge, and the flame stabilization hole outlet has a first hole lower edge, with the first hole upper edge being located below the first hole lower edge. Thus, even if overflow occurs, although external water may enter the annular groove through the second hole entrance of the main flame hole, the inner flame stabilization hole is not easily clogged because the first hole upper edge is lower than the first hole lower edge.

[0010] For example, the angle between the central axis of the main flame hole and the vertical direction is β, 55°≤β<90°. This avoids the problem that when the angle is too small, part of the gas is directly injected outside the annular groove and cannot be effectively burned.

[0011] For example, the main flame hole outlet has a second lower edge, and a distance h1 is defined between the second lower edge and the first bottom end surface, with h1 being 1 mm to 4 mm. This avoids the problem of too small a distance h1 causing easy wall breakage or deformation during machining of the main flame hole, and also avoids the problem of too large a distance h1 causing the flame in the annular groove to be too short as it passes around the outer wall, preventing effective flame stabilization.

[0012] For example, the outer wall is provided with a circle of outer flame stabilizing holes connecting the annular groove with the outside above the second hole segment. In this way, above the main flame hole, the outer flame stabilizing holes can work together with the annular groove to pull the flame of the main flame hole up and down to prevent flame separation.

[0013] For example, the outer flame stabilization hole has an inlet located on the first inner side surface and an outlet located on the first outer side surface. The outer flame stabilization hole is arranged horizontally or tilted downward from the inlet to the outlet. This can not only hold the flame of the main flame hole in place to prevent flame separation, but also prevent gas from being directly ejected outward through the outer flame stabilization hole. Furthermore, it can prevent external water from entering the annular groove through the outer flame stabilization hole in the event of overflow.

[0014] For example, the diameter of the first hole segment is d1, the diameter of the second hole segment is d2, and d2>d1. In this way, the flame can be stabilized and the main flame hole can pass more gas, thereby improving combustion performance.

[0015] For example, d2 = (1.2-1.5) × d1. In this way, the speed-limiting and flame-stabilizing effect and the combustion performance can be further improved.

[0016] For example, the top wall has an exposed top surface, on which a liquid collecting groove is formed, which is recessed toward the gas passage. In this way, when the pot overflows, the overflowing liquid can flow into the liquid collecting groove, thereby preventing the overflowing liquid from flowing down and extinguishing the flame.

[0017] For example, a is 1.5 mm to 4 mm. This not only avoids the problem of insufficient secondary air intake and the inability of the gas to form an effective flame stabilizing ring, but also avoids the problem of excessive gas accumulation time and excessive gas consumption.

[0018] For example, a wall thickness t is defined between the first outer side and the first inner side, and t is between 1 mm and 4 mm. This avoids the problem of wall breakage or deformation during machining of the main flame hole when the wall thickness t is too small, and also avoids the problem of the flame in the annular groove being too short when it passes around the outer wall and failing to effectively stabilize the flame when the wall thickness t is too large.

[0019] According to another aspect of the present invention, a burner is provided, comprising any one of the small flame covers described above. Since the small flame cover described above has the above beneficial effects, the burner provided with the small flame cover will also have the above beneficial effects.

[0020] The advantages and features of the present invention are described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The following drawings of the present invention are hereby incorporated into the present invention for understanding the present invention. The drawings show embodiments of the present invention and their descriptions, and are used to explain the principles of the present invention. In the drawings,

[0022] Figure 1 A perspective view of a small fire cover according to an exemplary embodiment of the present invention;

[0023] Figure 2 for Figure 1 Main view of the small and medium fire cover;

[0024] Figure 3 To be able to reflect Figure 1 A cross-sectional view of the internal structure of the small fire cover;

[0025] Figure 4 for Figure 1 Bottom view of the medium and small fire cover.

[0026] The above drawings include the following reference numerals:

[0027] 10—Ontology

[0028] 11—Top wall

[0029] 1101—Top

[0030] 12—Sidewall

[0031] 121—Inner wall

[0032] 1211—Second outer side

[0033] 1212—Second inner side

[0034] 1213—Second bottom end surface

[0035] 122—Outer wall

[0036] 1221—First outer side

[0037] 1222—First medial surface

[0038] 1223—first bottom end surface

[0039] 13—Gas channel

[0040] 14—Main fire hole

[0041] 1401—First hole entrance

[0042] 1402—Main fire hole outlet

[0043] 14021—lower edge of the second hole

[0044] 1403—Second hole entrance

[0045] 14031—Upper edge of the first hole

[0046] 141—First hole section

[0047] 142—Second hole section

[0048] 15—Annular groove

[0049] 16—Internal flame stabilization hole

[0050] 1601—Flame stabilization hole entrance

[0051] 1602—Flame stabilizing hole outlet

[0052] 16021—lower edge of the first hole

[0053] 17—External flame stabilization hole

[0054] 1701—Hole Entrance

[0055] 1702—hole exit

[0056] 18—Liquid tank DETAILED DESCRIPTION

[0057] In the following description, a large amount of detail is provided to facilitate a thorough understanding of the present invention. However, it will be appreciated by those skilled in the art that the following description merely illustrates preferred embodiments of the present invention, and that the present invention may be practiced without one or more of these details. Furthermore, to avoid confusion with the present invention, some technical features well known in the art have not been described in detail.

[0058] For household gas stoves, their burners usually have a large fire cover (also called an outer ring fire cover) and a small fire cover (also called a center fire cover) to form at least two rings of flames, thereby providing a variety of flame modes when the user uses it. Accordingly, the burner further includes a large fire distributor and a small fire distributor, as well as a large fire venturi and a small fire venturi. The small fire distributor is arranged at the center of the large fire distributor. The large fire cover and the small fire cover are respectively covered on the large fire distributor and the small fire distributor, and the large fire cover is located on the periphery of the small fire cover. The large fire venturi and the small fire venturi are respectively connected to the large fire distributor and the small fire distributor. The large fire distributor, the large fire cover and the large fire venturi form a large fire gas mixing chamber. The small fire distributor, the small fire cover and the small fire venturi form a small fire gas mixing chamber.

[0059] The following will be combined Figures 1 to 4 A small fire cover according to an embodiment of the present invention will be described.

[0060] The small fire cover includes a main body 10, which includes a top wall 11, a side wall 12 and a gas channel 13. A circle of main fire holes 14 is arranged on the side wall 12, and the side wall 12 includes an inner wall 121 and an outer wall 122. The length of the inner wall 121 is greater than the length of the outer wall 122, and the top wall 11 and the inner wall 121 are combined to form a gas channel 13, and the main fire hole 14 connects the gas channel 13 with the outside; the inner wall 121, the top wall 11 and the outer wall 122 are combined to form an annular groove 15 connecting the main fire hole 14 with the outside, and the annular groove 15 divides the main fire hole 14 into a first hole section 141 located on the inner wall 121 and a second hole section 142 located on the outer wall 122; the inner wall 121 is provided with a circle of inner flame stabilizing holes 16 connecting the gas channel 13 and the annular groove 15 above the first hole section 141. It should be noted that the "outside" and "inside" involved here are relative to the small fire cover on the small fire divider. After the small fire cover is on the small fire divider, the side that is relatively closer to the center of the small fire cover is the "inside", and the side that is relatively farther away from the center of the small fire cover is the "outside".

[0061] The above-mentioned small fire cover is based on the setting of the annular groove 15 and the inner flame-stabilizing hole 16. On the one hand, when the gas passes through the main fire hole 14 and the inner flame-stabilizing hole 16 through the annular groove 15, most of the gas in the inner flame-stabilizing hole 16 accumulates in the annular groove 15 and burns in the annular groove 15, which can make the oil-water mixture blocked in the main fire hole 14 evaporate as soon as possible to keep the main fire hole 14 unobstructed, so that there is no need to spend a lot of time manually to clear the blocked fire holes, and the cost of replacing the fire cover due to fire hole blockage can also be reduced; on the other hand, a part of the gas stored in the annular groove 15 will flow out from the bottom of the annular groove 15 and be ignited by those main fire holes 14 that can still burn normally, forming a small flame-stabilizing ring, pulling the flame of the main fire hole 14 above, and preventing the flame of the main fire hole 14 from leaving the flame due to the fast gas flow rate, thereby achieving a flame stabilizing effect.

[0062] like Figure 3As shown, the outer wall 122 has a first outer side surface 1221, a first inner side surface 1222, and a first bottom end surface 1223. The first bottom end surface 1223 is connected between the first outer side surface 1221 and the first inner side surface 1222 and is away from the top wall 11. The inner wall 121 has a second outer side surface 1211, a second inner side surface 1212, and a second bottom end surface 1213. The second bottom end surface 1213 is connected between the second outer side surface 1211 and the second inner side surface 1212 and is away from the top wall 11. The first bottom end surface 1223 is located above the second bottom end surface 1213. The distance between the first inner side surface 1222 and the second outer side surface 1211 defines the width a of the annular groove 15. In this way, the small fire cover has a brim shape as a whole. The annular groove 15 extends approximately vertically upward to communicate with the main fire hole 14. This is more conducive to a portion of the gas stored in the annular groove 15 flowing out from below the annular groove 15 and being ignited by the main fire holes that are still burning normally, thereby improving the flame stabilization effect.

[0063] See again Figure 3 The inner flame-stabilizing hole 16 has a flame-stabilizing hole inlet 1601 located on the second inner side surface 1212 and a flame-stabilizing hole outlet 1602 located on the second outer side surface 1211. The inner flame-stabilizing hole 16 is inclined upward from the flame-stabilizing hole inlet 1601 to the flame-stabilizing hole outlet 1602. As a result, when the gas passes through the inner flame-stabilizing hole 16, it is injected into the annular groove 15 at a certain angle rather than flowing directly to the outside. This allows the gas to accumulate quickly and stably in the annular groove 15, ensuring that there is sufficient gas in the annular groove 15 for ignition and stable combustion. This can quickly clear the blocked flame hole, ensure more complete combustion of the gas, and reduce the formation of yellow flames.

[0064] The primary flame hole 14 has a first hole inlet 1401 located on the second inner side surface 1212 and a primary flame hole outlet 1402 located on the first outer side surface 1221. The primary flame hole 14 is inclined upward from the first hole inlet 1401 to the primary flame hole outlet 1402. This facilitates drilling of the primary flame hole 14 while ensuring the gas rate used to generate the flame, thereby improving thermal efficiency.

[0065] As an exemplary embodiment, the angle β between the central axis of the primary flame hole 14 and the vertical direction is 55°≤β<90°. For example, β is 55°, 60°, 65°, 75°, 80°, 85°, 88°, and so on. This avoids the problem of a small angle causing a portion of the gas to be directly ejected outside the annular groove 15 and unable to burn effectively. In an unillustrated embodiment, the primary flame hole 14 can also be arranged horizontally along the direction from the first hole inlet 1401 to the primary flame hole outlet 1402.

[0066] Since the side wall 12 is divided into an inner side wall 121 and an outer side wall 122 by the annular groove 15, the main fire hole 14 is also divided into two sections by the annular groove 15 (such as the first hole section 141 located on the inner side wall 121 and the second hole section 142 located on the outer side wall 122 as described above). The main fire hole 14 has a second hole entrance 1403 located on the first inner side surface 1222. The second hole entrance 1403 has a first hole upper edge 14031. The flame stabilizing hole outlet 1602 has a first hole lower edge 16021. The first hole upper edge 14031 is located below the first hole lower edge 16021. In this way, even if overflow occurs, although outside water may enter the annular groove 15 through the second hole entrance 1403 of the main fire hole 14, since the first hole upper edge 14031 is lower than the first hole lower edge 16021, the inner flame stabilizing hole 16 is not easily blocked.

[0067] The main flame hole outlet 1402 has a second hole lower edge 14021. A distance h1 is defined between the second hole lower edge 14021 and the first bottom end surface 1223. h1 is in the range of 1 mm to 4 mm. For example, h1 can be 1 mm, 2 mm, 3 mm, 4 mm, etc. This avoids the problem of too small a distance h1 causing the main flame hole 14 to break or deform during machining. It also avoids the problem of too large a distance h1 causing the flame in the annular groove 15 to be too short when it passes around the outer wall 122, preventing effective flame stabilization.

[0068] For example, the outer wall 122 is provided with a circle of outer flame-stabilizing holes 17 connecting the annular groove 15 and the outside above the second hole section 142. In this way, above the main fire hole 14, the outer flame-stabilizing holes 17 can, together with the annular groove 15, pull the flame of the main fire hole 14 up and down to prevent the flame from separating. It should be understood that the outer flame-stabilizing holes 17 and the inner flame-stabilizing holes 16 are processed separately, so that the angle of the outer flame-stabilizing holes 17 can be different from the angle of the inner flame-stabilizing holes 16, the aperture size of the outer flame-stabilizing holes 17 can be different from the aperture size of the inner flame-stabilizing holes 16, and the number of the outer flame-stabilizing holes 17 and the number of the inner flame-stabilizing holes 16 can also be different.

[0069] For example, the outer flame stabilization hole 17 has an inlet 1701 located on the first inner side 1222 and an outlet 1702 located on the first outer side 1221. The outer flame stabilization hole 17 is arranged horizontally or tilted downward from the inlet 1701 to the outlet 1702. This not only holds the flame of the main flame hole 14 in place to prevent flame separation, but also prevents gas from being directly ejected outward through the outer flame stabilization hole 17. Furthermore, it prevents external water from entering the annular groove 15 through the outer flame stabilization hole 17 in the event of overflow.

[0070] As previously described, the primary flame hole 14 comprises a first hole segment 141 located on the inner sidewall 121 and a second hole segment 142 located on the outer sidewall 122. The first hole segment 141 has a diameter of d1, while the second hole segment 142 has a diameter of d2. In a preferred embodiment, d2 > d1. This achieves a rate-limiting and flame-stabilizing effect, allowing more gas to pass through the primary flame hole 14, improving combustion performance.

[0071] For example, d2 = (1.2-1.5) × d1. In this way, the speed-limiting and flame-stabilizing effect and the combustion performance can be further improved.

[0072] As a preferred embodiment, the top wall 11 has an exposed top surface 1101, on which a liquid receiving groove 18 is formed, which is recessed toward the gas passage 13. In this way, when an overflow occurs, the overflow can flow into the liquid receiving groove 18, thereby preventing the overflow from flowing down and extinguishing the flame.

[0073] As a preferred embodiment, the distance a between the first inner side surface 1222 and the second outer side surface 1211 (i.e., the width of the annular groove 15) is 1.5 mm to 4 mm. For example, a is 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, etc. This not only avoids insufficient secondary air intake and the inability of the gas to form an effective flame stabilization ring, but also avoids the problems of excessive gas accumulation and excessive gas consumption.

[0074] As a preferred embodiment, a wall thickness t is defined between the first outer side surface 1221 and the first inner side surface 1222, and t is in the range of 1 mm to 4 mm. For example, the wall thickness t is 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, and so on. This avoids the problem of the wall thickness t being too small, which may easily cause the wall to break or deform during the processing of the main flame hole 14. It also avoids the problem of the wall thickness t being too large, which may cause the flame in the annular groove 15 to be too short when it bypasses the outer wall 122, failing to effectively form a flame stabilization effect.

[0075] According to another aspect of the present invention, a burner is provided, comprising any of the above-described low-flame caps. Furthermore, the burner may include a venturi and a flame distributor. The venturi and flame distributor may have various existing or future configurations, which do not limit the scope of protection of the present invention.

[0076] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by directional words such as "up", "down", "horizontal", "vertical", etc. is usually based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the scope of protection of the present invention; the directional words "inside" and "outside" refer to the inside and outside relative to the outline of each component itself.

[0077] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between one or more components or features shown in the figures and other components or features. It should be understood that spatially relative terms include not only the orientation of the components as described in the figures, but also different orientations during use or operation. For example, if the components in the drawings are inverted as a whole, the situation where the components are "above other components or features" or "above other components or features" will include the situation where the components are "below other components or structures" or "below other components or structures". Thus, the exemplary term "above" may include both the orientations "above" and "below". In addition, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and this document is intended to include all of these situations.

[0078] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, parts, components and / or combinations thereof.

[0079] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0080] The present invention has been described through the above-described embodiments. However, it should be understood that the above-described embodiments are for illustrative and illustrative purposes only and are not intended to limit the present invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments and that various variations and modifications may be made based on the teachings of the present invention, all of which fall within the scope of the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A small fire cover, comprising a body, the body comprising a top wall, a side wall and a gas channel, the side wall being provided with a circle of main fire holes, characterized in that: The side wall includes an inner wall and an outer wall, the top wall and the inner wall together form the gas channel, and the main fire hole connects the gas channel with the outside; the length of the inner wall is greater than the length of the outer wall, and the inner wall, the top wall and the outer wall together form an annular groove connecting the main fire hole with the outside, and the annular groove divides the main fire hole into a first hole section located on the inner wall and a second hole section located on the outer wall; the inner wall is provided with a circle of inner flame stabilizing holes connecting the gas channel and the annular groove above the first hole section.

2. The small fire cover according to claim 1, characterized in that: The outer side wall has a first outer side surface, a first inner side surface and a first bottom end surface, the first bottom end surface is connected between the first outer side surface and the first inner side surface and away from the top wall; the inner side wall has a second outer side surface, a second inner side surface and a second bottom end surface, the second bottom end surface is connected between the second outer side surface and the second inner side surface and away from the top wall; the first bottom end surface is located above the second bottom end surface, and the distance between the first inner side surface and the second outer side surface forms the width a of the annular groove.

3. The small fire cover according to claim 2, characterized in that: The inner flame stabilization hole has a flame stabilization hole inlet located on the second inner side surface and a flame stabilization hole outlet located on the second outer side surface. The inner flame stabilization hole is inclined upward from the flame stabilization hole inlet to the flame stabilization hole outlet.

4. The small fire cover according to claim 3, characterized in that: The main fire hole has a first hole inlet located on the second inner side surface and a main fire hole outlet located on the first outer side surface, and the main fire hole is inclined upward along a direction from the first hole inlet to the main fire hole outlet.

5. The small fire cover according to claim 4, characterized in that: The main fire hole has a second hole entrance located on the first inner side surface, the second hole entrance has a first hole upper edge, the flame stabilization hole outlet has a first hole lower edge, and the first hole upper edge is located below the first hole lower edge.

6. The small fire cover according to claim 4, characterized in that: The included angle between the central axis of the main fire hole and the vertical direction is β, 55°≤β<90°.

7. The small fire cover according to claim 4, characterized in that: The main fire hole outlet has a second hole lower edge, and a distance h1 is provided between the second hole lower edge and the first bottom end surface, and h1 is 1 mm to 4 mm.

8. The small fire cover according to claim 2, characterized in that: The outer side wall is provided with a circle of outer flame stabilizing holes communicating with the annular groove and the outside above the second hole segment.

9. The small fire cover according to claim 8, characterized in that: The outer flame stabilization hole has a hole inlet located on the first inner side surface and a hole outlet located on the first outer side surface. The outer flame stabilization hole is horizontally arranged or tilted downward along the direction from the hole inlet to the hole outlet.

10. The small fire cover according to claim 1, characterized in that: The aperture of the first hole section is d1, the aperture of the second hole section is d2, and d2>d1.

11. The small fire cover according to claim 10, characterized in that: d2=(1.2~1.5)×d1.

12. The small fire cover according to claim 1, characterized in that: The top wall has an exposed top surface, and a liquid storage tank is formed on the top surface and is recessed toward the gas channel.

13. The small fire cover according to any one of claims 2 to 12, characterized in that: a is 1.5mm~4mm.

14. The small fire cover according to any one of claims 2 to 9, characterized in that: A wall thickness t is provided between the first outer side surface and the first inner side surface, and t is 1 mm to 4 mm.

15. A burner, characterized in that: The utility model comprises a small fire cover according to any one of claims 1 to 14.

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