Fire cover and hob comprising the same

Abstract

The utility model discloses a fire cover and contain its kitchen range, including fire cover body and combustion mesh, the gas mixing chamber has in fire cover body, the upper surface of lid body has the first recess, and the combustion mesh forms the buffer chamber with the first recess, and the side of buffer chamber away from the combustion mesh has a plurality of through -hole, and the through -hole links the gas mixing chamber and buffer chamber, wherein, the cross section size of first recess along the gas -exhaust direction of through -hole is along bigger and bigger, and the setting of a plurality of through -hole can carry out certain resistance effect to mixed gas through the wall thickness between through -hole, and then reach the effect of reducing the speed of mixed gas into buffer chamber, and the above -mentioned effect can prevent mixed gas from overflowing fast under the condition of secondary air deficiency or no steady flame structure, causes the flame -leaving phenomenon, through the cross section size of first recess along the gas -exhaust direction of through -hole is bigger and bigger, can make mixed gas reduce flowing speed after entering buffer chamber, further prevent the flame -leaving phenomenon from generating.

Description

Technical Field

[0001] This utility model relates to the field of kitchen utensils, and in particular to a burner cap and a stove containing the burner cap. Background Technology

[0002] To achieve multi-zone combustion in existing inner ring burners, an independent second gas passage is usually opened in the center of the inner ring, including an independent mixing chamber and an injector. In order for the flame to burn stably at this location, a secondary air inlet is often designed to supplement secondary air. The overall burner structure is relatively complex and has a large diameter, which affects combustion efficiency. Due to the opening of the secondary air inlet, it is more susceptible to the effects of liquid overflow.

[0003] Without a secondary air inlet, liquid overflow can be effectively prevented, and the high-temperature flue gas can be avoided by the secondary air circulation, thus improving combustion efficiency. However, due to the lack of secondary air, shallow depth of the top flame hole, low air resistance at the top and fast gas flow, and lack of flame stabilization structure, it is difficult for the top flame to achieve stable combustion, resulting in flame lift-off. Flame lift-off is generally divided into two types: one is flame lift-off caused by insufficient secondary air supply, and the other is flame lift-off caused by the lack of flame stabilization structure. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defect that the flame at the top of the inner ring burner cap of the existing stove is difficult to achieve stable combustion, thus causing flame lift-off phenomenon, and to provide a burner cap and a stove containing it.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] A flame cap includes a flame cap body and a combustion mesh, wherein the flame cap body has a gas mixing chamber.

[0007] The upper surface of the burner body has a first groove, and the combustion mesh and the first groove together form a buffer chamber. The side of the buffer chamber away from the combustion mesh has multiple through holes, which connect the gas mixing chamber and the buffer chamber.

[0008] Among them, the cross-sectional dimension of the first groove increases as it moves along the air outlet direction of the through hole.

[0009] In this design, the buffer chamber has multiple through holes on the side away from the combustion mesh. This arrangement allows the mixture of fuel gas and air to flow from the mixing chamber to the buffer chamber, thus facilitating combustion of the combustion mesh. Furthermore, compared to the existing technology where there is only one large hole between the mixing chamber and the buffer chamber, the multiple through holes can impede the mixture by increasing the wall thickness between them, thereby reducing the speed at which the mixture enters the buffer chamber. This effect can prevent the mixture from rapidly overflowing and causing flame lift-off when there is insufficient secondary air or no flame stabilization structure.

[0010] Furthermore, by making the cross-sectional size of the first groove increasingly larger along the outlet direction of the through hole, the flow velocity of the mixed gas can be reduced after entering the buffer chamber, further preventing flame lift-off.

[0011] Preferably, the inclined groove wall of the first groove forms an angle of 30°-45° with the vertical direction.

[0012] In this solution, the angle between the inclined groove wall of the first groove and the vertical direction can prevent the angle from being too large, which would make the area of ​​the side of the buffer chamber away from the combustion mesh too small, making it impossible to set multiple through holes. On the other hand, it can prevent the angle from being too small, which would result in the velocity of the mixed gas in the buffer chamber not decreasing significantly.

[0013] Preferably, the flame holes on the combustion mesh are staggered with the through holes along the gas outlet direction of the through holes.

[0014] In this design, the flame holes on the combustion mesh are staggered with the through holes along the gas outlet direction. This arrangement allows the mixed gas exiting the through holes to collide with the combustion mesh, thus forming a blunt flame. By staggering the through holes with the flame holes on the combustion mesh, the outflow velocity of the mixed gas is further reduced by the combustion mesh, thereby further preventing flame lift-off.

[0015] Preferably, the spacing between the through holes is greater than 2.5 times the diameter of the flame holes on the combustion mesh.

[0016] In this design, the spacing between the through holes is greater than 2.5 times the diameter of the flame holes on the combustion mesh. This arrangement results in a large spacing between the through holes and a denser flame hole on the combustion mesh. This means that the wall thickness between the through holes increases the ability of the gas mixture to be blocked, thereby reducing the velocity of the gas mixture. It also increases the amount of gas mixture impacting the combustion mesh, further reducing the velocity of the gas mixture and preventing flame lift-off.

[0017] Preferably, the flame holes on the combustion mesh are densely packed, and the size of the flame holes is smaller than the size of the through holes.

[0018] In this design, the flame holes on the combustion mesh are densely packed, and the size of the flame holes is smaller than that of the through holes. This design allows the mixed gas to be cut more by the flame holes on the combustion mesh after flowing out of the through holes, meaning that the mixed gas impacts the combustion mesh more often, thereby further reducing the velocity of the mixed gas.

[0019] Preferably, the diameter of the through hole is between 1.2cm and 1.8cm, and the diameter of the through hole is 1 to 1.5 times the diameter of the flame hole on the combustion mesh.

[0020] In this scheme, the diameter of the through hole ranges from 1.2cm to 1.8cm, and the diameter of the through hole is 1 to 1.5 times the diameter of the flame hole on the combustion mesh. The relationship between the diameter of the through hole and the diameter of the flame hole can slow down the outflow rate of the mixed gas as much as possible while ensuring the amount of normal mixed gas flowing out.

[0021] Preferably, the total area of ​​the through holes is less than 1 / 10 of the total area of ​​the flame holes on the combustion mesh, and the outermost diameter formed by the through holes is greater than 1 / 2 of the diameter of the combustion mesh.

[0022] In this design, the total area of ​​the through holes is less than 1 / 10 of the total area of ​​the flame holes on the combustion mesh. This design allows the mixed gas flowing out of one through hole to be cut by the flame holes on multiple combustion meshes. In addition, the outermost diameter of the through holes is greater than 1 / 2 of the diameter of the combustion mesh. If the outermost diameter of the through holes is too small, the flame at the very center of the combustion mesh will be too concentrated, and the demand for secondary air will increase, resulting in flame lift-off. The above design can avoid this situation.

[0023] Preferably, the number of fire holes on the cut combustion mesh corresponding to the through holes is greater than the number of through holes.

[0024] In this scheme, the total circumference of multiple small holes is greater than the circumference of a single large hole of the same area. The longer the circumference, the more holes there are in the cutting mesh, the easier it is to replenish secondary air, and the more obvious the bluff body flame stabilization effect.

[0025] Preferably, the flame cap body includes a flame cap main body and a cover covering the flame cap main body. The first groove is located on the top of the cover. The lower surface of the cover has a guide surface and a stain collection part at its edge. The stains generated when the flame cap is working flow along the guide surface to the stain collection part.

[0026] In this design, the guide surface and the stain collection section are designed so that the dripping stains are collected by the guide surface and fall into the stain collection section, thus preventing stains from accumulating at the flame holes of the burner cap body and the thermocouple flame protection holes.

[0027] Preferably, the flame cap body has two flow guide grooves, which are opened along the axial direction of the flame cap body on the outer peripheral wall of the flame cap body and located on both sides of the thermocouple flame-keeping hole of the flame cap body.

[0028] In this design, the flow guide groove makes the surface where the thermocouple flame storage hole is located relatively independent from the surface where the flow guide groove 5 is located, forming a watershed structure. This effectively prevents the liquid flowing down through the flow guide groove from flowing back into the surface where the thermocouple flame storage hole is located, avoiding dirt clogging the thermocouple flame storage hole. Compared with the traditional solution of adding a protective edge, it uses less material and saves on the cost of the flame cap.

[0029] Preferably, the upper surface of the cover has an annular second groove, the first groove is formed on the bottom surface of the second groove, and the combustion mesh is disposed on the bottom surface of the second groove and configured to cover the opening of the first groove.

[0030] In this design, the above-mentioned arrangement increases the contact area between the combustion mesh and the burner body, making the combustion mesh stably mounted on the burner body and less likely to fall off. On the other hand, it allows the overflowing mixed gas to flow into the second groove and not immediately diffuse out, thereby improving combustion efficiency.

[0031] Preferably, the flame cap is a cylindrical inner ring flame cap, with the mixing chamber, through hole, buffer chamber and combustion mesh arranged in sequence along the vertical upward direction.

[0032] In this scheme, the above settings help improve the combustion efficiency of the mixed gas and prevent the mixed gas from failing to reach the combustion mesh in time, which would affect the combustion efficiency.

[0033] This utility model also provides a stove, which includes the aforementioned burner cap.

[0034] The positive and progressive effects of this utility model are as follows: the buffer chamber has multiple through holes on the side away from the combustion mesh. This arrangement allows the mixture of gas and air to flow from the mixing chamber to the buffer chamber to achieve combustion of the combustion mesh. On the other hand, compared with the existing technology where there is only one large hole between the mixing chamber and the buffer chamber, the arrangement of multiple through holes can block the mixture of gas to a certain extent through the wall thickness between the through holes (that is, throttling), thereby reducing the speed at which the mixture of gas enters the buffer chamber. This effect can prevent the mixture of gas from overflowing rapidly and causing flame lift-off when there is insufficient secondary air or no flame stabilization structure.

[0035] Furthermore, by making the cross-sectional size of the first groove increasingly larger along the outlet direction of the through hole, the flow velocity of the mixed gas after entering the buffer chamber can be reduced, further preventing flame lift-off. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of the flame cover according to an embodiment of the present invention.

[0037] Figure 2 This is another structural schematic diagram of the flame cover according to an embodiment of the present invention.

[0038] Figure 3 This is a bottom view of the flame cover according to an embodiment of the present invention.

[0039] Figure 4 This is a schematic diagram of the structure of the flame cover body according to an embodiment of the present invention.

[0040] Figure 5 This is a cross-sectional view of the flame cover according to an embodiment of the present invention.

[0041] Explanation of reference numerals in the attached figures:

[0042] Fire cap 100

[0043] Fire cover body 1

[0044] Mixing chamber 11

[0045] First groove 12

[0046] Through hole 121, air outlet direction A

[0047] Buffer chamber 13

[0048] Cover 14

[0049] Flame cap body 15

[0050] Second groove 16

[0051] Combustion mesh 2

[0052] Dense pores 21

[0053] Guide surface 3

[0054] Stain Collection Section 4

[0055] Guide channel 5

[0056] Thermocouple flame protection hole 6

[0057] Stepped Fire Hole 7

[0058] Drainage and gas replenishment port 8 Detailed Implementation

[0059] The present invention will be further described below with reference to the accompanying drawings and by way of embodiments, but the present invention is not limited to the scope of the embodiments thereon.

[0060] like Figure 1-5 As shown, this embodiment provides a burner cap 100, which is installed in the burner of a stove. The burner cap 100 includes a burner cap body 1 and a combustion mesh 2. The burner cap body 1 has a mixing chamber 11, and the upper surface of the burner cap body 1 has a first groove 12. The combustion mesh 2 and the first groove 12 together form a buffer chamber 13. The side of the buffer chamber 13 away from the combustion mesh 2 has multiple through holes 121, which connect the mixing chamber 11 and the buffer chamber 13. Wherein, as... Figure 5 As shown, along the air outlet direction A of the through hole 121, the cross-sectional dimension of the first groove 12 increases.

[0061] In this embodiment, the buffer chamber 13 has multiple through holes 121 on the side away from the combustion mesh 2. This arrangement allows the mixture of fuel gas and air to flow from the mixing chamber 11 to the buffer chamber 13 to achieve combustion of the combustion mesh 2. On the other hand, compared to the case where there is only one large hole between the mixing chamber 11 and the buffer chamber 13 in the prior art, the arrangement of multiple through holes 121 can block the mixture gas to a certain extent through the wall thickness between the through holes 121, thereby reducing the speed at which the mixture gas enters the buffer chamber 13. This effect can prevent the mixture gas from overflowing rapidly and causing flame lift-off when there is insufficient secondary air or no flame stabilization structure.

[0062] Furthermore, by making the cross-sectional size of the first groove 12 increasingly larger along the outlet direction A of the through hole 121, the flow velocity of the mixed gas after entering the buffer chamber 13 can be reduced, further preventing flame lift-off.

[0063] It should be noted that the burner cap 100 described in this embodiment is specifically the inner ring burner cap of the stove. This burner cap 100 is located at the center of the burner and consists of a common copper burner cap body 1 and a combustion mesh 2 forming a single mixing chamber 11. This mixing chamber 11 contains two types of flame holes to achieve two flame combustion states: round flame holes on the lower burner cap body 15 with a long flame that can cover the bottom of the pot, thus having a large design load ratio; and flame holes on the top combustion mesh 2 with a short flame, but closer to the bottom of the pot, thus having a small design load ratio. This design effectively covers the bottom of the pot, significantly improving flame uniformity. Preferably, the recommended ratio of lower flame load to top flame load is 7:3; moreover, the long lower flame can directly ignite the short top flame. Because there is no secondary air vent between the round flame holes on the burner cap body 15 and the flame holes on the top combustion mesh 2, it will not be disturbed by secondary airflow, thus eliminating the need for a flame transfer groove structure. In other embodiments, the above-described structural improvements to the top of the burner cap 100 can also be applied to the outer ring burner cap or the middle ring burner cap of the stove.

[0064] Furthermore, the mixing chamber 11 is where the two flame gas paths belong to the same path, without a separate combustion gas path for the top combustion mesh 2. This approach effectively simplifies the structure and volume of the inner cavity of the burner cap 100. There is no need to design independent gas passages on the cap 14, the burner cap body 15, the mixing chamber 11, and the base. The overall size is reduced, the flame is more concentrated, and it has more efficient characteristics.

[0065] The first groove 12 is designed so that after the gas passes through the through holes 121, it passes through the gradually expanding section, where part of the kinetic energy of the gas is converted into static pressure, and the velocity further decreases. The static pressure is used to overcome the energy loss when the gas overflows from the combustion mesh 2. Moreover, the gas outlet direction of the through holes 121 is the gas outlet direction A.

[0066] The inclined groove wall of the first groove 12 forms an angle of 30°-45° with the vertical direction.

[0067] In this embodiment, the angle between the inclined groove wall of the first groove 12 and the vertical direction can prevent the angle from being too large, which would make the area of ​​the side of the buffer chamber 13 away from the combustion mesh 2 too small to provide multiple through holes 121. On the other hand, it can prevent the angle from being too small, which would result in the velocity of the mixed gas in the buffer chamber 13 not decreasing significantly.

[0068] like Figure 4 As shown, along the outlet direction A of the through hole 121, the flame holes on the combustion mesh 2 are staggered with the through hole 121. In this embodiment, the staggered arrangement of the flame holes on the combustion mesh 2 along the outlet direction A of the through hole 121 allows the mixed gas exiting the through hole 121 to impact the combustion mesh 2, thereby forming a blunt flame. By staggering the arrangement of the through hole 121 and the flame holes on the combustion mesh 2, the outflow velocity of the mixed gas is further reduced by the combustion mesh, thereby further preventing flame lift-off.

[0069] The spacing between the through holes 121 is greater than 2.5 times the diameter of the fire holes on the combustion mesh 2.

[0070] In this embodiment, the spacing between the through holes 121 is greater than 2.5 times the diameter of the flame holes on the combustion mesh 2. This arrangement results in a large spacing between the through holes 121 and a denser flame hole on the combustion mesh 2. In other words, it improves the ability of the wall thickness between the through holes 121 to block the mixed gas, i.e., the ability to reduce the velocity of the mixed gas. It also increases the amount of mixed gas impacting the combustion mesh 2, thereby further reducing the velocity of the mixed gas and preventing flame lift-off.

[0071] It should be noted that in this embodiment, there are 6 through holes 121. With the same area as a single large hole in the prior art, the secondary air at the root of multiple through holes 121 is easier to replenish than a single large hole.

[0072] like Figure 5 As shown, the flame holes on the combustion mesh 2 are dense holes 121, and the size of the flame holes is smaller than the size of the through holes 121.

[0073] In this embodiment, the flame holes on the combustion mesh 2 are dense holes 121, and the size of the flame holes is smaller than that of the through holes 121. This arrangement allows the mixed gas to be cut more by the flame holes on the combustion mesh 2 after flowing out of the through holes 121, that is, the mixed gas impacts the combustion mesh 2 more often, thereby further reducing the speed of the mixed gas.

[0074] The aperture of the through hole 121 is between 1.2cm and 1.8cm, and the aperture of the through hole 121 is 1 to 1.5 times the aperture of the flame hole on the combustion mesh 2.

[0075] In this embodiment, the aperture of the through hole 121 is between 1.2cm and 1.8cm. The aperture of the through hole 121 is 1 to 1.5 times the aperture of the flame hole on the combustion mesh 2. The relationship between the aperture of the through hole 121 and the aperture of the flame hole can slow down the outflow rate of the mixed gas as much as possible while ensuring the amount of normal mixed gas flowing out.

[0076] It should be noted that in this embodiment, a total of 8 flame holes are cut on the combustion mesh 2, and the flame holes on the combustion mesh 2 stabilize each other, thereby making the flame stable and less prone to flameout.

[0077] like Figure 5 As shown, the total area of ​​the through holes 121 is less than 1 / 10 of the total area of ​​the flame holes on the combustion mesh 2, and the outermost diameter formed by the through holes 121 is greater than 1 / 2 of the diameter of the combustion mesh 2.

[0078] In this embodiment, the total area of ​​the through holes 121 is less than 1 / 10 of the total area of ​​the flame holes on the combustion mesh 2. This arrangement allows the mixed gas flowing out of one through hole 121 to be cut by multiple flame holes on the combustion mesh 2. In addition, the outermost diameter formed by the through holes 121 is greater than 1 / 2 of the diameter of the combustion mesh 2. If the outermost diameter formed by the through holes 121 is too small, the flame at the very center of the combustion mesh 2 will be too concentrated, and the secondary air demand will also increase, resulting in flame lift-off. The above arrangement can avoid this situation.

[0079] like Figure 5 As shown, the number of fire holes on the cut combustion mesh 2 corresponding to the through hole 121 is greater than the number of through holes 121.

[0080] In this embodiment, the total circumference of multiple small holes is greater than the circumference of a single large hole of the same area. The longer the circumference, the more holes there are in the cutting mesh, the easier it is to replenish secondary air, and the more obvious the bluff body flame stabilization effect.

[0081] like Figure 2-5 As shown, the flame cap body 1 includes a flame cap 100, a flame cap body 15, and a cover 14 covering the flame cap body 1. A first groove 12 is located on the top of the cover 14. The lower surface of the cover 14 has a guide surface 3 and a stain collection part 4 at its edge. Stains generated when the flame cap 100 is in operation flow along the guide surface 3 to the stain collection part 4. In this embodiment, the guide surface 3 and the stain collection part 4 are provided so that dripping stains are collected by the guide surface 3 and fall into the stain collection part 4, avoiding the accumulation of stains at the flame holes and thermocouple flame protection holes 6 of the flame cap body 1.

[0082] The flame cap body 1 has two flow guide grooves 5, which are opened on the outer peripheral wall of the flame cap body 1 along the axial direction of the flame cap body 1 and located on both sides of the thermocouple flame-keeping hole 6 of the flame cap body 1.

[0083] In this embodiment, the flow guide 5 is configured such that the surface where the thermocouple flame-holding hole 6 is located is relatively independent from the surface where the flow guide 5 is located, forming a watershed structure. This effectively prevents the liquid flowing down through the flow guide 5 from flowing back into the surface where the thermocouple flame-holding hole 6 is located, avoiding dirt clogging the thermocouple flame-holding hole 6. Compared with the traditional implementation with a protective edge, this method uses less material and saves on the cost of the flame cap 100.

[0084] It should be noted that frequent use of the stove can easily clog the burner holes of the burner cap body 15, causing difficulties in ignition and flame retention, which inconveniences users. Current gas stoves, in order to alleviate this problem, have incorporated anti-clogging features to block the burner holes below the ignition needle and thermocouple. While this method can prevent some dirt from entering the burner holes, it tends to accumulate at the thermocouple flame retention holes and lacks a guiding function, thus still presenting some issues. The aforementioned guide surface 3 and dirt collection part 4 in this embodiment effectively solve this problem.

[0085] In addition, the surface where the thermocouple flame-holding hole 6 is located is set as the lowest surface of the outer peripheral wall of the flame cap body 15.

[0086] like Figure 4 As shown, an annular second groove 16 is provided on the upper surface of the cover 14, and a first groove 12 is provided on the bottom surface of the second groove 16. The combustion mesh 2 is provided on the bottom surface of the second groove 16 and is configured to cover the opening of the first groove 12.

[0087] In this embodiment, the above-mentioned arrangement increases the contact area between the combustion mesh 2 and the flame cap body 1, so that the combustion mesh 2 is stably set on the flame cap body 1 and is not easy to fall off. On the other hand, it allows the overflowing mixed gas to flow into the second groove 16 and not immediately diffuse out, thereby improving the combustion efficiency.

[0088] It should be noted that the opening edge of the second groove 16 is contracted above the combustion mesh 2 to prevent the combustion mesh 2 from falling off.

[0089] like Figure 4 As shown, in this embodiment, the flame cap 100 is cylindrical in shape, and the mixing chamber 11, through hole 121, buffer chamber 13 and combustion mesh 2 are arranged in sequence along the vertical upward direction.

[0090] In this embodiment, the above-mentioned arrangement is beneficial to improving the combustion efficiency of the mixed gas and avoiding the mixed gas not reaching the combustion mesh 2 in time, which would affect the combustion efficiency.

[0091] This utility model also provides a stove, which includes the aforementioned burner cap 100.

[0092] It should be noted that the existing ignition structure of the burner cap 100 is designed with multiple through holes 121 on the side of the burner cap 100. As oil flows down the side of the burner cap 100, it is easy to enter the inside of the burner holes, causing blockage, affecting the user experience and posing a safety hazard.

[0093] In this embodiment, the inner ring burner cap 100 is equipped with stepped burner holes 7, which effectively prevents oil from clogging the main gas outlet. A drain / gas supply port 8 with a large inclination angle is added to the hole wall. This drain / gas supply port 8 helps to drain liquid contaminants when liquid enters the burner hole. Simultaneously, this drain / gas supply port 8 can replenish the ignition hole with gas. This combined design of the overflow port and stepped burner holes 7 makes the burner hole less prone to clogging, and the dual gas channel design ensures a stable supply of gas required for ignition even under slight blockage conditions. This greatly improves the stability of the ignition structure.

[0094] The stove and burner can be controlled by a voice module, which is equipped with a controller, a voice receiving module, and a voice parsing module. The voice receiving module receives user commands, and the voice parsing module parses the commands. Based on the parsed commands, the controller controls the stove or burner to perform corresponding operations, thereby realizing intelligent control of the stove and burner and improving the user experience.

[0095] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and 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, they should not be construed as limitations on this utility model.

[0096] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A flame cap, comprising a flame cap body and a combustion mesh, wherein the flame cap body has a gas mixing chamber, characterized in that: The upper surface of the flame cap body has a first groove, and the combustion mesh and the first groove together form a buffer chamber. The side of the buffer chamber away from the combustion mesh has multiple through holes, and the through holes connect the gas mixing chamber and the buffer chamber. The cross-sectional dimension of the first groove increases gradually along the air outlet direction of the through hole.

2. The flame cap as described in claim 1, characterized in that, The inclined groove wall of the first groove forms an angle of 30°-45° with the vertical direction.

3. The flame cap as described in claim 1, characterized in that, Along the air outlet direction of the through hole, the flame holes on the combustion mesh are staggered with the through hole; and / or, The spacing between the through holes is greater than 2.5 times the diameter of the fire holes on the combustion mesh.

4. The flame cap as described in claim 1, characterized in that, The flame holes on the combustion mesh are densely packed, and the size of the flame holes is smaller than the size of the through holes; and / or, The diameter of the through hole ranges from 1.2cm to 1.8cm, and the diameter of the through hole is 1 to 1.5 times the diameter of the flame hole on the combustion mesh.

5. The flame cap as described in claim 1, characterized in that, The total area of ​​the through holes is less than 1 / 10 of the total area of ​​the flame holes on the combustion mesh, and the outermost diameter formed by the through holes is greater than 1 / 2 of the diameter of the combustion mesh.

6. The flame cap as described in claim 1, characterized in that, The number of fire holes on the combustion mesh corresponding to the through holes is greater than the number of through holes.

7. The flame cap as described in claim 1, characterized in that, The flame cap body includes a flame cap main body and a cover covering the flame cap main body. The first groove is located on the top of the cover. The lower surface of the cover has a guide surface and a stain collection part at its edge. Stains generated when the flame cap is in operation flow along the guide surface to the stain collection part, and / or... The flame cap body has two flow guide grooves, which are opened along the axial direction of the flame cap body on the outer peripheral wall of the flame cap body and located on both sides of the thermocouple flame-keeping hole of the flame cap body.

8. The flame cap as described in claim 7, characterized in that, The upper surface of the cover is provided with an annular second groove, the first groove is provided on the bottom surface of the second groove, and the combustion mesh is provided on the bottom surface of the second groove and is configured to cover the opening of the first groove.

9. The flame cap as described in claim 1, characterized in that, The flame cap is a cylindrical inner ring flame cap, and the gas mixing chamber, the through hole, the buffer chamber and the combustion mesh are arranged in sequence along the vertical upward direction.

10. A stove, characterized in that, The stove includes the burner cap as described in any one of claims 1-9.

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