CN218721484U - Fire cover and combustor with same - Google Patents

Abstract

The embodiment of the utility model provides a fire lid and combustor that has it. The fire cover is provided with a gas mixing cavity, the fire cover comprises a fire cover top wall and a fire cover side wall, the fire cover side wall is provided with a plurality of fire trough groups along the circumferential interval, each of the fire trough groups comprises a first fire trough and a second fire trough which are upwards sunken from the bottom surface of the fire cover side wall, the first fire trough is provided with a first gas inlet and a first gas outlet, the second fire trough is provided with a second gas inlet and a second gas outlet, the first gas outlet and the second gas outlet are both positioned on the outer surface of the fire cover side wall, and a first central line of the first gas outlet and a second central line of the second gas outlet are intersected at an intersection point positioned on the outer peripheral side of the fire cover. The gas can form the offset at first gas outlet and second gas outlet, has strengthened the air current disturbance, has promoted the mixture of gas and secondary air, has improved the stability of burning. In addition, the first fire groove and the second fire groove can be rapidly machined through means such as grooving, the machining process is rapid, the machining process is simple, and the manufacturing cost is saved.

Description

Fire cover and combustor with same

Technical Field

The utility model relates to a technical field of combustor specifically relates to a fire lid and combustor that has it.

Background

The gas stove is a common household burner in daily life. The gas stove is mainly a stove burning liquefied combustible gas as fuel. The fire cover is the main component of the gas stove.

The fire lid typically includes a large fire lid and a small fire lid. In the prior art, a plurality of fire holes are usually arranged on the side wall of a large fire cover and a small fire cover. After primary air mixing is carried out on gas in the burner of the burner, the gas flows out from the fire holes corresponding to the fire covers in a free jet mode. And secondary air is mixed and combusted near the fire hole outlet. In order to improve the secondary air mixing efficiency, the adjacent fire holes of some fire covers have certain included angles. The gas can generate the offset after being sprayed out through the fire holes, thereby bringing disturbance near the fire holes and promoting the mixing of the gas and the air.

The fire holes in the prior art are of a hole-shaped structure, such as a toothed hole, a round hole and the like. And the fire hole is a through hole which penetrates from the outer surface to the inner surface of the side wall of the fire cover. This has just led to all need once to fix a position the drill bit when processing every fire hole, and the rethread drill bit drills one by one, consequently leads to the course of working more complicated, and manufacturing cost is high.

SUMMERY OF THE UTILITY MODEL

In order to at least partially solve the problems occurring in the prior art, according to one aspect of the present invention, a fire lid is provided. The fire cover is provided with a gas mixing cavity, the fire cover comprises a fire cover top wall and a fire cover side wall, the fire cover side wall is provided with a plurality of fire groove groups at intervals along the circumferential direction, each of the fire groove groups comprises a first fire groove and a second fire groove which are upwards sunken from the bottom surface of the fire cover side wall, the first fire groove is provided with a first gas inlet and a first gas outlet, the second fire groove is provided with a second gas inlet and a second gas outlet, the first gas inlet and the second gas inlet are communicated with the gas mixing cavity, the first gas outlet and the second gas outlet are both positioned on the outer surface of the fire cover side wall, and the first center line of the first gas outlet and the second center line of the second gas outlet are intersected at an intersection point positioned on the outer peripheral side of the fire cover.

So set up, the first central line through first gas outlet intersects in the nodical of the periphery side that is located the fire lid with the second central line of second gas outlet, and the gas can form the offset at first gas outlet and second gas outlet, has strengthened the air current disturbance, has promoted the mixture of gas and secondary air, has improved the stability of burning, has improved the efficiency of burning. Moreover, first fire groove and second fire groove can all be upwards sunken from the bottom surface of fire lid lateral wall, so, first fire groove and second fire groove can be processed through means such as grooving fast, compare in current offset hole column structure, and the course of working is more swift, and processing technology is simple, has saved manufacturing cost.

Illustratively, the first air outlet and the second air outlet are distributed on the outer surface of the side wall of the fire cover at intervals. So set up, the gas is along first gas outlet and second gas outlet at the exhaust in-process, and two strands of gas can form the offset at the periphery side of fire lid, has avoided forming the offset near the inner periphery side of fire lid lateral wall, avoids reducing its speed in the early stage that the gas flows, avoids the offset to take place in advance at the inner periphery side of fire lid lateral wall and can't arouse the disturbance in periphery side.

Illustratively, the minimum spacing between the first air outlet and the second air outlet on the outer surface of the side wall of the fire cover is 3-6mm. For example, the minimum pitch may be 3mm, 4mm, 5mm, or 6mm, etc. So set up, the gas is by first gas outlet and second gas outlet outflow back, can form the offset at the root of gas flame, and two strands of gas are discharged promptly and are offset promptly and burn immediately and form a flame. If the minimum distance is too large, two gas flows are discharged and combusted, and then the two gas flows can be opposite to each other at the middle part or the tip part of the flame, the flow rate of the gas is reduced, and the opposite impact effect is weak. And the user is very easy to observe two opposite flames at the peripheral side of the fire cover, and the user experience is not good.

Illustratively, the first fire slot and the second fire slot are symmetrical about a line connecting the intersection point and the center of the fire cover. So set up, the gas is by mixing the gas chamber behind first fire groove and the second fire groove, can be discharged by first fire groove and second fire groove with the same speed. The first fire channel and the second fire channel may generally form an isosceles triangle. After the fuel gas is flushed between the first air outlet and the second air outlet, the formed air flow just follows the radial direction of the fire cover. The combustion is more stable.

Illustratively, the first centerline has a first angle α with a line between the intersection and the center of the fire cover, and the second centerline has a second angle β with the line, the first angle α being different from the second angle β. So set up, the gas can have with different speeds behind first fire groove and the second fire groove by the gas mixing chamber. After the first air outlet and the second air outlet are oppositely flushed, the formed air flow direction is the swirling air flow along the side wall of the fire cover. Equivalently, the length of the flame is lengthened, more cookers can be adapted, and the combustion efficiency is improved.

Illustratively, the first centerline and the second centerline are at an angle γ, γ being between 10 ° and 60 °. Illustratively, γ may be 10 °, 15 °, 20 °, 25 °, 30 °, 35 °, 40 °, 45 °, 50 °, 55 °, or 60 °, etc. By the arrangement, the fuel gas can be uniformly and effectively distributed to the first fire groove and the second fire groove, and the fuel gas and the second fire groove are not interfered with each other; moreover, the gas can be sufficiently burned.

Illustratively, the first fire groove is provided with a first fire groove top surface opposite to the bottom surface of the side wall of the fire cover, and the first fire groove top surface extends obliquely upwards along the direction from the first air inlet to the first air outlet; and the second fire trough is provided with a second fire trough top surface opposite to the bottom surface of the side wall of the fire cover, and the second fire trough top surface extends obliquely upwards along the direction from the second air inlet to the second air outlet. So set up, first fire groove top surface and second fire groove top surface all can play the effect of upwards direction, and when the gas was discharged by first fire groove and second fire groove, the air current was upwards for inclining. The airflow in the direction is more beneficial to quickly contacting the bottom surface of the cooker, the distance between the flame and the bottom surface of the cooker is shortened, and the cooking speed is accelerated.

Illustratively, the bottom surface of the fire lid side wall extends obliquely upward in a radially outward direction. By the arrangement, all the gas sprayed out from the first fire groove and the second fire groove can be ensured to have an upward inclined flow direction; after the fuel gas flows out in an upward inclined mode, the fuel gas can be gathered at the bottom of the stove more quickly, and the utilization rate of energy is improved.

For example, the cross section perpendicular to the radial direction of the first fire groove is the same at each position. With the arrangement, compared with the first fire groove with the abrupt cross section, the gas has stable flow speed and pressure in the first fire groove, and meanwhile, the first gas outlet of the first fire groove can have continuous gas outflow, so that a swirling area caused by the abrupt cross section in the first fire groove is avoided, and the interruption of the ejected gas flow is avoided.

For example, the cross section perpendicular to the radial direction of the second fire groove is the same at each position. So set up, compare in the second fire groove that has the sudden change cross section, the gas has steady velocity of flow and pressure in second fire inslot portion, has guaranteed simultaneously that the second gas outlet of second fire groove can have continuous gas and flow out, avoids spun gas stream to break and make a break.

Illustratively, the fire cover side wall comprises a plurality of pot frame fire-avoiding areas and a plurality of flame areas which are alternately arranged along the circumferential direction, and a plurality of fire slot groups are distributed in the plurality of flame areas. So set up, the fire lid can set up the region of avoiding it to receive the direct toasting of flame for the pot frame, has improved the suitability of fire lid. And thereby avoid the impaired unable cooking utensils of supporting of intensity of the pot frame with fire lid adaptation, prolonged the life of pot frame in other words, promoted user's whole experience sense.

Illustratively, the length of the first fire slot is 20-30mm. For example, the length of the first fire channel can be 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, or 30mm, etc. So set up, first fire groove can have good guide effect.

Illustratively, the length of the second fire slot is 20-30mm. For example, the length of the second fire slot may be 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, 30mm, or the like. So set up, the second fire groove can have good guide effect.

Illustratively, the distance from the intersection point to the outer surface of the fire lid side wall is 3-10mm. For example, it may be 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, or the like. So set up, can make from the gas in first fire groove and second fire groove accomplish the offset at the root of flame roughly, disturbance kinetic energy is big, promotes the better mixture of gas and secondary air.

According to another aspect of the present invention, there is also provided a burner. The combustor includes furnace end and aforementioned fire lid. The fire cover is buckled at the top of the furnace end.

Illustratively, the burner has a burner sidewall opposite a burner cap sidewall, a bottom surface of the burner cap sidewall being spaced apart from a top surface of the burner sidewall at least on a side adjacent an outer surface thereof and forming a flame holding groove.

Illustratively, the fire lid is big fire lid, and the inner peripheral side of fire lid roof is provided with downwardly extending's annular supporting part, and the annular supporting part supports on the top surface of furnace end and with the top surface laminating of furnace end.

A series of concepts in a simplified form are introduced in the disclosure, which will be described in further detail in the detailed description section. The summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

The advantages and features of the present invention are described in detail below with reference to the accompanying drawings.

Drawings

The following drawings of the present invention are used herein as part of the present invention for understanding the present invention. There are shown in the drawings, embodiments and descriptions thereof, which are used to explain the principles of the invention. In the drawings, there is shown in the drawings,

fig. 1 is a front view of a fire cover according to an exemplary embodiment of the present invention;

FIG. 2 is a top view of the fire lid shown in FIG. 1;

FIG. 3 is a bottom view of the fire lid shown in FIG. 1;

FIG. 4 isbase:Sub>A cross-sectional view A-A of FIG. 3;

FIG. 5 is an isometric view of the fire lid shown in FIG. 1;

FIG. 6 is a bottom view of another embodiment of a fire lid;

FIG. 7 is an enlarged view of a portion of FIG. 3;

FIG. 8 is a front view of another embodiment of a fire chute set; and

fig. 9 is an isometric view of a burner in accordance with an exemplary embodiment of the present invention.

Wherein the figures include the following reference numerals:

100. a fire cover; 101. a gas mixing cavity; 110. the top wall of the fire lid; 111. an annular support portion; 120. a fire cover side wall; 121. a bottom surface; 122. a fire-proof area of the pot frame; 123. a flame zone; 200. 200', 200", fire chute groups; 210. 210', 210", a first fire slot; 211. 211", a first inlet; 212. 212", a first air outlet; 213. 213", a first centerline; 214. a first fire trough top surface; 220. 220', 220", a second fire slot; 221. 221", a second air inlet; 222. 222", a second air outlet; 223. 223", a second centerline; 224. the top surface of the second fire trough.

Detailed Description

In the following description, numerous details are provided to provide a thorough understanding of the present invention. One skilled in the art, however, will understand that the following description illustrates only a preferred embodiment of the invention and that the invention may be practiced without one or more of these details. In addition, some technical features that are well known in the art are not described in detail in order to avoid obscuring the present invention.

In the following description, a detailed structure will be presented for a thorough understanding of embodiments of the invention. It is apparent that the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. The following detailed description of the preferred embodiments of the invention, however, the invention is capable of other embodiments in addition to those detailed.

The utility model provides a fire cover. Especially a big fire lid. This configuration can also be used for small fire lids if desired. In order to understand the present invention as a whole, a burner using the fire cover will be described first.

For a household gas range, a burner thereof generally has a large fire cover and a small fire cover to form at least two rings of flames, thereby providing a variety of flame modes when used by a user. Accordingly, the burner further includes a large cap burner and a small cap burner, and a large flame venturi and a small flame venturi. The small fire cover furnace end is arranged at the center of the large fire cover furnace end. The big fire cover and the small fire cover are respectively covered on the big fire cover furnace end and the small fire cover furnace end, and the big fire cover is positioned at the periphery of the small fire cover. The big fire venturi and the small fire venturi are respectively connected to the big fire cap furnace end and the small fire cap furnace end. The big fire cover furnace end, the big fire cover and the big fire venturi form a big fire mixed gas cavity. The small fire cover furnace end, the small fire cover and the small fire venturi form a small fire mixed gas cavity.

The fire cover 100 according to an embodiment of the present invention will be described with reference to fig. 1 to 8. The utility model provides a fire cover 100. The fire lid 100 may have a gas mixing chamber 101. The fire lid 100 may also include a fire lid top wall 110 and a fire lid side wall 120. The fire lid top wall 110 and the fire lid side wall 120 may surround the gas mixing chamber 101. The fire cover side wall 120 may be provided with a plurality of fire slot groups 200 at circumferentially spaced intervals. The outer surface of the fire lid side wall 120 may be substantially cylindrical, or may have other configurations, which are not limited herein. The construction of each fire slot set 200 may be the same or different. The spacing between adjacent fire slot groups 200 on the outer surface of the fire cover side wall 120 may be the same or different, and is not limited herein. Each of the plurality of fire slot sets 200 may include a first fire slot 210 and a second fire slot 220. The first fire groove 210 and the second fire groove 220 may both be recessed upward from the bottom surface 121 of the fire lid side wall 120. It will be appreciated that the first fire slot 210 and the second fire slot 220 may have openings in the bottom surface 121 of the fire lid side wall 120. The cross-sectional shapes of the first fire groove 210 and the second fire groove 220 may be various, such as an inverted V-shape, an inverted U-shape, a trapezoid shape, or an arc shape, which is not limited herein. The first fire groove 210 and the second fire groove 220 may have the same shape of cross section or different shapes of cross sections. The first fire groove 210 and the second fire groove 220 are upwardly recessed from the bottom surface 121 of the fire cover side wall 120, and may be formed in one step by a casting process. The operator can also use the bottom surface 121 of the fire trough side wall as a processing surface to set an initial processing reference thereon, and then directly process all the first fire trough 210 and the second fire trough 220 on the bottom surface 121 of the fire trough side wall by milling or other processing means without continuously rotating and moving the fire cover 100. In the counter-punching structure in the prior art, the outer surface or the inner surface of the fire cover side wall 120 is required to be used as a processing surface during processing, and in general, the fire cover 100 is generally circular, so that when the counter-punching structure is processed, the fire cover 100 needs to be continuously rotated, positioning is required before each hole is processed, and the whole processing process is extremely complicated, time-consuming and labor-consuming.

As shown in fig. 4 and 5, the first fire slot 210 may have a first air inlet 211 and a first air outlet 212. The second fire slot 220 may have a second air inlet 221 and a second air outlet 222. The first inlet 211 and the second inlet 221 may both communicate with the gas mixing chamber 101. The first inlet 211 and the second inlet 221 may be located on the bottom surface 121 of the fire box side wall, or may be located on the inner surface of the fire box side wall, which is not limited herein. The first and second air outlets 212, 222 may be located on the outer surface of the fire lid side wall 120. During combustion, the gas is ejected from the gas mixing chamber 101 and enters the corresponding first fire groove 210 and second fire groove 220 through the first gas inlet 211 and the second gas inlet 221. Under the guiding action of the first fire groove 210 and the second fire groove 220, the fuel gas is respectively ejected from the first air outlet 212 and the second air outlet 222 along the first central line 213 of the first air outlet 212 and the second central line 223 of the second air outlet 222. Since the first center line 213 and the second center line 223 can intersect with each other on the outer circumferential side of the fire cover 100, the combustion gas discharged from the first gas outlet 212 and the second gas outlet 222 intersects with each other on the outer circumferential side of the fire cover 100 and collides therewith. It can be understood that, after the gas collides against the outer peripheral side of the fire cover 100, a disturbance of the gas flow is instantaneously formed on the outer peripheral side of the fire cover 100. This airflow disruption creates a negative pressure environment at the ends of first air outlet 212 and second air outlet 222, which encourages more ambient air to enter the space more quickly. In the process of air current disturbance, the mixing of gas and secondary air has also been increased simultaneously for both mix more evenly, avoid mixing inhomogeneous and lead to the insufficient combustion.

So set up, the gas can form the offset at first gas outlet 212 and second gas outlet 222, has strengthened the air current disturbance, has promoted the mixture of gas and secondary air, has improved the stability of burning, has improved the efficiency of burning. Moreover, the first fire groove 210 and the second fire groove 220 can both be recessed upwards from the bottom surface 121 of the fire cover side wall 120, and can be quickly machined by means of grooving and the like, compared with the existing counter-punching-hole-shaped structure, the machining process is quicker, the machining process is simple, and the manufacturing cost is saved.

For example, as shown in fig. 2 and 7, the first air outlet 212 and the second air outlet 222 may be spaced apart from each other on the outer surface of the fire lid side wall 120. It will be appreciated that the first air outlet 212 does not overlap the first air outlet 212 at the outer surface of the fire lid side wall 120. With such an arrangement, in the process of discharging the gas along the first gas outlet 212 and the second gas outlet 222, two gas flows can form opposite impacts on the outer peripheral side of the fire cover 100, so that the opposite impacts on the inner peripheral side close to the fire cover side wall 120 are avoided, the speed of the gas flow is prevented from being reduced in the early stage of the gas flow, and the opposite impacts are prevented from occurring on the inner peripheral side of the fire cover side wall 120 in advance and cannot cause disturbance on the outer peripheral side.

Illustratively, the minimum spacing D of the first and second air outlets 212, 222 on the outer surface of the fire lid side wall 120 may be 3-6mm, as shown in FIG. 7. For example, the minimum pitch may be 3mm, 4mm, 5mm, or 6mm, etc. With such a configuration, after the fuel gas flows out from the first outlet 212 and the second outlet 222, the fuel gas can form a collision at the root of the flame of the fuel gas, i.e. two streams of fuel gas are discharged and then rapidly collide and immediately combust to form a flame. If the minimum distance is too large, two gas flows are discharged and combusted, and then the two gas flows can be opposite to each other at the middle part or the tip part of the flame, the flow rate of the gas is reduced, and the opposite impact effect is weak. Moreover, the user is very likely to observe two opposite flames at the outer peripheral side of the fire cover 100, and the user experience is not good.

Of course, the minimum distance between the first air outlet 212 and the second air outlet 222 may be further reduced, for example, the minimum distance may be zero. For example, as shown in FIG. 6, first air outlet 212' and second air outlet 222' of fire slot set 200' may be located immediately adjacent to one another. In this case, the edges of the first air outlet 212 'and the second air outlet 222' on the outer surface of the fire cover side wall 120 may be overlapped, but the first center line of the first air outlet 212 'and the second center line of the second air outlet 222' still intersect on the outer circumferential side of the fire cover, so that the air flows coming out of the two air outlets still collide with each other near the air outlets, thereby promoting the mixing of the fuel gas and the secondary air and improving the combustion efficiency.

Illustratively, as shown in fig. 3 and 7, the first and second fire slots 220 may be symmetrical about a line connecting the intersection point and the center of the fire cover 100. With this arrangement, the gas can be discharged from the first fire pit and the second fire pit 220 at the same speed after passing through the first fire pit and the second fire pit 220 from the gas mixing chamber 101. The first fire slot and the second fire slot 220 may generally form an isosceles triangle. After the gas is flushed between the first gas outlet and the second gas outlet 222, the formed gas flow is just along the radial direction of the fire cover 100. The combustion is more stable.

Illustratively, as shown in fig. 8, the first centerline 213 "may have a first included angle α with a line connecting the intersection point and the center of the fire lid 100. The second centerline 223 "may have a second included angle β with the connecting line. The first included angle α may be different from the second included angle β. It will be appreciated that the first fire slot 210 "and the second fire slot 220" are asymmetric about a line connecting the intersection point C and the center of the fire lid 100. So configured, the gas can have different speeds after passing through the first fire groove 210 "and the second fire groove 220" from the gas mixing chamber 101. After the first air outlet 212 "and the second air outlet 222" are oppositely flushed, the formed air flow direction is a swirling air flow along the side wall of the fire cover. Equivalently, the length of the flame is lengthened, more cookers can be adapted, and the combustion efficiency is improved.

Illustratively, as shown in fig. 3 and 7, the angle between the first center line 213 and the second center line 223 may be γ. Gamma may be from 10 deg. to 60 deg.. Illustratively, γ may be 10 °, 15 °, 20 °, 25 °, 30 °, 35 °, 40 °, 45 °, 50 °, 55 °, or 60 °, etc. With such an arrangement, the fuel gas can be uniformly and effectively distributed to the first fire groove and the second fire groove 220 without interfering with each other; moreover, the gas can be sufficiently combusted.

Illustratively, as shown in FIG. 1, the first fire slot 210 may have a first fire slot top surface 214. The first fire slot top surface 214 may be the surface opposite the bottom surface of the fire lid side wall. The first fire slot top surface 214 may extend obliquely upward in a direction from the first air inlet to the first air outlet. The second fire slot 220 may have a second fire slot top surface 224. The second fire slot top surface 224 may be the surface opposite the bottom surface of the fire lid side wall. The second fire slot top surface 224 may extend obliquely upward in a direction from the second inlet port 221 to the second outlet end. So configured, both the first fire slot top surface 214 and the second fire slot top surface 224 can function as an upward guide, and the gas flow is inclined upward when the gas is exhausted from the first fire slot and the second fire slot 220. The airflow in the direction is more beneficial to quickly contact the bottom surface of the cooker, the distance between flame and the bottom surface of the cooker is shortened, and the cooking speed is accelerated.

The bottom surface of the fire cover side wall can be in the horizontal direction. In one embodiment, for example, the bottom surface of the fire lid side wall may extend obliquely upward in a radially outward direction. By the arrangement, all the gas sprayed out from the first fire groove and the second fire groove 220 can have an upward inclined flow direction; after the fuel gas flows out in an upward inclined mode, the fuel gas can be gathered at the bottom of the stove more quickly, and the utilization rate of energy is improved.

The cross section perpendicular to the radial direction of the first fire groove may be different at various positions. For example, the cross section away from the center of the fire cover is larger than the cross section close to the center of the fire cover, i.e., the first fire groove may be divergent in the radial direction. In another embodiment, the first fire slot may be tapered in a radial direction. For example, the cross section perpendicular to the radial direction of the first fire channel may be the same at each position. It will be appreciated that the first fire slots are of uniform size in the radial direction and are not of a tapered trumpet or other abrupt configuration. Therefore, the gas can have the same speed and pressure at each cross section perpendicular to the radial direction in the first fire groove, and stable airflow can be formed, so that sudden changes of pressure and speed caused by contraction of the cross section can be avoided, and even no gas is sprayed out of the first fire groove at a certain moment. Compared with the first fire groove with the abrupt cross section, the gas has stable flow speed and pressure in the first fire groove, and meanwhile, the gas outlet of the first fire groove can have continuous gas outflow, so that a vortex area caused by the abrupt cross section in the first fire groove is avoided, and the interruption of the ejected gas flow is avoided.

For example, the cross-section perpendicular to the radial direction of the second fire groove 220 may be the same at each position. So set up, compare in the second fire groove 220 that has the sudden change cross section, the gas has steady velocity of flow and pressure in second fire groove 220 inside, has guaranteed simultaneously that the gas outlet of first fire groove can have continuous gas and flows out, avoids spun gas stream to break and make a break.

Illustratively, as shown in fig. 1 and 5, the fire lid side wall may include a plurality of pot holder flame escape zones 122 and a plurality of flame zones 123. The plurality of the pot rack flame shielding regions 122 and the plurality of the flame regions 123 may be alternately arranged along the circumferential direction of the side wall of the fire cover. A plurality of fire slot sets may be distributed within the plurality of flame zones 123. It can be understood that the fire-avoiding zone 122 of the pot rack is not provided with a fire chute group, i.e., the flames are not discharged from the fire-avoiding zone 122 of the pot rack. The number of the fire-sheltering zones 122 of the wok stand may be three, four, five, etc. The number of the fire-avoiding regions 122 of the wok stand can be consistent with the number of the supporting legs of the wok stand. When the number of the supporting legs of the pot frame is three, the number of the fire-proof areas of the pot frame is also three. When the number of the supporting legs of the pot rack is four, the number of the fire-avoiding regions 122 of the pot rack is also four. In one embodiment, the fire-avoiding regions of the pot racks can be uniformly distributed along the whole circumferential direction of the side wall of the fire cover, namely, the included angle between two adjacent fire-avoiding regions of the pot racks is 90 degrees. In another embodiment, the included angle between two adjacent fire-avoiding regions 122 of the four pot racks may not be 90 degrees, for example, the included angle between one pot rack fire-avoiding region and the pot rack fire-avoiding region adjacent to the right side is 180 degrees, and the included angle between one pot rack fire-avoiding region and the pot rack fire-avoiding region adjacent to the left side is 45 degrees. The arrangement of the fire-proof areas of the pot racks can be various and is not limited here.

So set up, fire lid 100 can set up the region of avoiding it to receive the direct toasting of flame for the pot frame, has improved fire lid 100's suitability. And thereby avoid the impaired unable cooking utensils of supporting of intensity of the pot frame with the adaptation of fire lid 100, prolonged the life of pot frame in other words, promoted user's whole experience sense.

Illustratively, the length of the first fire slot may be 20-30mm. For example, the length of the first fire slot may be 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, or 30mm, etc. So set up, first fire groove can have good guide effect.

Illustratively, the length of the second fire slot 220 may be 20-30mm. For example, the length of the second fire slot 220 may be 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, or 30mm, etc. So configured, the second fire groove 220 can have a good guiding function.

The cast iron fire cover is easier to machine into the first fire groove and the second fire groove 220 having a length ranging from 20 to 30mm, compared to the copper fire cover.

Illustratively, the distance from the intersection point to the outer surface of the fire lid side wall may be 3-10mm. For example, it may be 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, or the like. So set up, can make the gas from first fire groove and second fire groove 220 accomplish the offset at the root of flame roughly, disturbance kinetic energy is big, promotes the better mixture of gas and secondary air.

The utility model discloses another aspect still provides a combustor. The burner may include a burner head and the previously described fire cap 100. The fire cover 100 may be snapped on top of the burner. Since the fire cover 100 has the above technical effects, the burner also has the above technical effects, and the detailed description thereof is omitted.

Illustratively, the burner may have a burner sidewall opposite a burner cap sidewall. The bottom surface of the side wall of the fire cover is spaced apart from the top surface of the side wall of the burner at least at one side adjacent to the outer surface thereof and forms a flame holding groove. It can be understood that the flame stabilizing groove is a circle of gap formed by the bottom surface of the side wall of the fire cover and the top surface of the side wall of the furnace end along the bottom surface of the side wall of the fire cover. The gap may be an annular gap along the bottom surface of the lid side wall and may act as a flame holder for the gas from the first and second outlets 212, 222 of the lid side wall. Additional flame holding holes or flame holding grooves or other flame holding structures are avoided from being formed in the flame cover 100. Moreover, compared with a locally processed flame stabilizing structure, the whole annular gap can play a flame stabilizing role on any flame on the side wall of the fire cover. So set up, can form annular flame stabilizing groove between bottom surface and the furnace end, do benefit to the flame stabilizing. Moreover, the flame holding groove can play a flame holding role for any flame at the side wall of the fire cover.

Illustratively, the fire lid 100 is a large fire lid. As shown in fig. 4, the inner circumferential side of the fire lid top wall 110 may be provided with a downwardly extending annular support portion 111. The annular support portion 111 may be supported on the top surface of the burner and may be attached to the top surface of the burner. So set up, big fire lid can be fixed on the furnace end to through the laminating with the top surface, prevent that the gas in the gas mixing chamber 101 from being let out by the contact department of annular supporting part 111 and furnace end.

In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional terms such as "front", "rear", "upper", "lower", "left", "right", "horizontal", "vertical", "horizontal" and "top", "bottom", etc., are generally based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, and in the case of not making a contrary explanation, these directional terms do not indicate and imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore, should not be construed as limiting the scope of the present invention; the terms "inner" and "outer" refer to the interior and exterior relative to the contours of the components themselves.

For ease of description, relative terms of regions, such as "over … …", "over … …", "over … …", "over", etc., may be used herein to describe the regional positional relationship of one or more components or features to other components or features shown in the figures. It is to be understood that the relative terms of the regions are intended to encompass not only the orientation of the element as depicted in the figures, but also different orientations in use or operation. For example, if an element in the drawings is turned over in its entirety, the articles "over" or "on" other elements or features will include the articles "under" or "beneath" the other elements or features. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". Further, these components or features may also be positioned at various other angles (e.g., rotated 90 degrees or other angles), all of which are intended to be encompassed herein.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, elements, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the 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 embodiments, and that many variations and modifications may be made in accordance with the teachings of the present invention, all within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (14)

1. A fire lid having a gas mixing chamber, the fire lid comprising a fire lid top wall and a fire lid side wall surrounding the gas mixing chamber, characterised in that,

the fire cover side wall is provided with a plurality of fire slot groups at intervals along the circumferential direction, each of the fire slot groups comprises a first fire slot and a second fire slot which are upwards sunken from the bottom surface of the fire cover side wall, the first fire slot is provided with a first air inlet and a first air outlet, the second fire slot is provided with a second air inlet and a second air outlet, wherein,

the first air inlet and the second air inlet are communicated with the air mixing cavity, the first air outlet and the second air outlet are both positioned on the outer surface of the side wall of the fire cover, and a first central line of the first air outlet and a second central line of the second air outlet are intersected at an intersection point positioned on the outer peripheral side of the fire cover.

2. The fire cover of claim 1 wherein said first gas outlet and said second gas outlet are spaced apart on an outer surface of said fire cover sidewall.

3. The fire cover of claim 2, wherein the first air outlet and the second air outlet are spaced apart a minimum distance of 3-6mm on the outer surface of the fire cover side wall.

4. The fire cover of claim 1 wherein said first fire slot and said second fire slot are symmetrical about a line drawn between said intersection point and the center of said fire cover.

5. The fire lid of claim 1 wherein said first centerline has a first included angle α with a line connecting said intersection and a center of said fire lid, and said second centerline has a second included angle β with said line, said first included angle α being different from said second included angle β.

6. The fire cover of claim 1 wherein said first centerline is at an angle γ of from 10 ° to 60 ° with respect to said second centerline.

7. The fire lid of claim 1,

the first fire groove is provided with a first fire groove top surface opposite to the bottom surface of the side wall of the fire cover, and the first fire groove top surface extends upwards in an inclined mode along the direction from the first air inlet to the first air outlet; and is provided with

The second fire groove is provided with a second fire groove top surface opposite to the bottom surface of the side wall of the fire cover, and the second fire groove top surface extends in an upward inclined mode along the direction from the second air inlet to the second air outlet.

8. The fire lid of claim 7 wherein the bottom surface of the fire lid side wall extends obliquely upward in a radially outward direction.

9. The fire cover of claim 8, wherein a cross-section perpendicular to a radial direction of the first fire slot is the same at each position; and/or the cross section perpendicular to the radial direction of the second fire trough is the same at each location.

10. The fire cover of claim 1 wherein said fire cover side wall includes a plurality of pot holder flame escape zones and a plurality of flame zones alternately arranged circumferentially, said plurality of fire chute groups being distributed within said plurality of flame zones.

11. The fire lid of claim 1,

the length of the first fire groove is 20-30mm; and/or

The length of the second fire groove is 20-30mm; and/or

The distance from the intersection point to the outer surface of the side wall of the fire cover is 3-10mm.

12. A burner comprising a burner and a fire cover as claimed in any one of claims 1 to 11, said fire cover snap-fitted to the top of said burner.

13. The burner of claim 12, wherein the burner has a burner sidewall opposite the burner cap sidewall, a bottom surface of the burner cap sidewall being spaced apart from a top surface of the burner sidewall at least on a side adjacent an outer surface thereof and forming a flame holding groove.

14. The burner of claim 13, wherein the fire cap is a large fire cap, and an inner circumferential side of a top wall of the fire cap is provided with a downwardly extending annular support portion supported on and engaged with a top surface of the burner.

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