CN110360565B

CN110360565B - Split type fire cover and combustor with same

Info

Publication number: CN110360565B
Application number: CN201910608387.1A
Authority: CN
Inventors: 方晓艳; 李林; 俞瑜; 郑军妹
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2019-07-07
Filing date: 2019-07-07
Publication date: 2020-10-27
Anticipated expiration: 2039-07-07
Also published as: CN110360565A

Abstract

A split type fire cover comprises an upper cover (1) and a lower cover (2) which are annular, wherein the upper cover (1) is placed on the lower cover (2), at least a gap is reserved between the upper cover and the lower cover adjacent to the outer periphery to form an annular fire outlet gap (13), a plurality of convex ribs (23) are arranged on the surface, opposite to the upper cover (1), of the lower cover (2) adjacent to the outer periphery at intervals along the circumferential direction, relatively independent gas channels are formed between the adjacent convex ribs (23), the convex ribs (23) are inclined relative to the peripheral line at least adjacent to the periphery of the lower cover (2), and all the convex ribs (23) are enabled to be arranged in a clockwise or anticlockwise rotation direction on the whole. The split fire cover is convenient to clean, the contact area of the outer ring and the bottom of a cooker is large due to the rotary fire, and the split fire cover has the advantages of uniform flame distribution and full secondary air supplement. The invention also discloses a combustor with the split fire cover. The ignition needle is convenient to install, and the fire transfer groove is convenient for the fire transfer between the fire outlet gap and the middle ring fire hole unit.

Description

Split type fire cover and combustor with same

Technical Field

The invention relates to the technical field of combustors, in particular to a split type fire cover and a combustor with the same.

Background

The fire hole that goes out on ordinary combustor, its fire lid generally is a plurality of independent apertures, and in daily use, because of the cooking utensil overflow leads to the fire hole to block up emergence occasionally, is difficult for wasing after blockking up yet, therefore how prevent that the fire hole from blockking up, how be convenient for clear up the fire hole after blockking up, is the problem that each combustor producer need solve always.

Therefore, the applicant previously applied a chinese patent of invention with application number CN201710792045.0 (publication number CN109424959A) 'a burner fire lid', and disclosed a split fire lid, which comprises a fire lid body including an upper lid and a base, wherein the upper lid and the base are both annular, the base has an annular groove, a first air inlet is opened on the bottom wall of the annular groove, the upper lid is covered on the opening of the annular groove, and the bottom surface of the upper lid and the inner wall of the annular groove enclose to form an air mixing ring cavity; one of the lower part of any side edge of the upper cover and the top edge of the corresponding side wall of the annular groove is provided with vertically extending lugs at intervals along the circumferential direction, the other part is provided with corresponding vertical depressions to form pits for embedding the lugs, the pits can be communicated with the air mixing ring cavity and the outside, and a gap is reserved between the lugs and the inner wall of the pits to form at least one fire outlet hole. Because the fire outlet hole is formed by vertically splicing the convex block of the upper cover and the concave pit of the base, the fire outlet hole is cleaned after the fire outlet hole meets overflowing liquid, and the upper cover and the base are simply cleaned separately; however, the design does not solve the problem of how to effectively prevent fire hole blockage caused by liquid overflowing, each fire hole in the design is still an independent small hole, when mixed gas flows out from the gas mixing cavity through the small hole, the flow rate is increased, unstable flame and even flame leaving phenomenon are easily caused, and meanwhile, because each fire hole is heated in a point shape, the bottom of the cooker is not uniformly heated.

The problem that the bottom of a cooker is not uniformly heated enough is solved by changing a plurality of point-shaped fire outlets into annular fire outlets in the invention patent of China with the application number of CN201711329638.X (with the publication number of CN108006638A) ("A combustor"), the combustor comprises an upper fire cover, a lower fire cover and a furnace end, wherein the lower fire cover is provided with an annular fire outlet gap, the lower fire cover is arranged on the furnace end, the upper fire cover is arranged on the lower fire cover, and the annular fire outlet gap is also arranged between the upper fire cover and the lower fire cover. Compared with an independent fire hole, the annular gap is adopted between the upper fire cover and the lower fire cover of the burner to emit fire, and the formed annular flame has the characteristic of uniform flame, so that the bottom of a cooker is uniformly heated.

On the other hand, in order to make the flame burning more sufficient, it is an effective means to design the flame to be a rotational flow arrangement in the clockwise or counterclockwise direction as a whole, for example, the chinese utility model patent application No. CN90219840.8 (publication No. CN2081045U) provides such a design as "inside and outside rotational flow burner of gas cooker", which is composed of a burning body and an air outlet cover, the peripheral wall of the air outlet cover is uniformly provided with an outer ring air outlet inclined slot hole and an inner ring air outlet inclined slot hole which are inclined from bottom to top and from side to side, furthermore, the chinese utility model patent CN201420113139.2 "double-layer discharge surface rotational flame air hole fire cover with a reinforcing rib structure" and CN201620759629.9 "a double-rotational flow burner" have similar designs, but the fire outlets of these designs are formed independently, and both the inside and outside flame arrangement are formed only in one dimension of the inside and outside extension direction, and are easily interfered with each other.

In conclusion, the split type fire cover and the combustor with the fire cover can be continuously improved.

Disclosure of Invention

The first technical problem to be solved by the present invention is to provide a split fire cover which is easy to clean after the overflow of the cooker occurs and has swirl flame, in view of the above prior art.

The second technical problem to be solved by the present invention is to provide a split type fire cover capable of effectively increasing the contact area between the fire and the bottom of the cooker.

The third technical problem to be solved by the present invention is to provide a split fire cover which can effectively prevent the overflow of the cooker from blocking the fire hole.

The fourth technical problem to be solved by the invention is to provide a burner with the fire cover.

The technical scheme adopted by the invention for solving the first technical problem is as follows: a split fire lid comprising upper and lower lids each having an annular shape, wherein the upper lid rests on the lower lid and both have a gap at least adjacent the outer periphery to form an annular fire gap, characterized in that: the lower cover is provided with a plurality of convex ribs at least on the surface adjacent to the outer periphery and opposite to the upper cover along the circumferential direction at intervals, relatively independent gas channels are formed between the adjacent convex ribs, and the convex ribs are inclined relative to the peripheral line at least at the periphery adjacent to the lower cover, so that all the convex ribs are arranged in a clockwise or anticlockwise rotation direction on the whole.

In order to further solve the second technical problem of the present invention, the bottom wall of the lower cover is provided with a plurality of air holes therethrough, and the corresponding position of the upper cover is provided with at least one circle of inner ring fire holes arranged along the circumferential direction.

In order to ensure that the inner ring fire holes are also arranged in a rotating direction on the whole, the air guide holes on the lower cover are inclined holes, the corresponding inner ring fire holes on the upper cover are also inclined holes and have the same inclination direction with the air guide holes at the corresponding positions, so that the gas can smoothly enter the inner ring fire holes from the air guide holes, and meanwhile, the contact area between the formed inner ring flame and the bottom of the cooker is larger;

as an improvement, all the inner ring fire holes on the upper cover are arranged in a clockwise or anticlockwise spiral direction on the whole;

in order to facilitate the gas to smoothly flow out from bottom to top, the inclination angle alpha of the gas guide hole of the lower cover relative to the horizontal plane is preferably 40-60 degrees;

in order to facilitate the gas to flow out of the gas guide holes of the lower cover and then enter the inner ring fire holes, the inclination angle beta of the inner ring fire holes of the upper cover relative to the horizontal plane is 40-60 degrees;

thus, the inner ring flames from the corresponding air guide holes vertically extend, and the outer ring flames from the annular fire outlet gaps are transversely spread, so that the contact area between the flames and the bottom of the cooker is enlarged, the inner ring flames and the outer ring flames are prevented from interfering with each other, and the heating efficiency is improved;

in order to increase the layering of the flame in the radial distribution, a plurality of groups of middle ring fire hole units which are arranged along the circumferential direction are further arranged between the inner ring fire hole and the outer periphery of the upper cover.

In order to facilitate the ignition of the middle fire hole units, the upper cover is communicated with at least one group of middle fire hole units through the radially extending ignition grooves.

The middle fire hole unit in every group can have multiple structures, preferably, the fire hole in the middle of two first fire holes that are the permutation of article font and the second that is located between two first fire holes in the middle of in every group, the second in the middle of fire hole and the inner ring fire hole that corresponds communicate through radially extending's flame stabilizing slot. The second middle fire hole is communicated with the inner ring fire hole through the flame stabilizing groove, and when the fuel gas gear is adjusted, the second middle fire hole is not easy to extinguish or weaken; in addition, the flame holding groove also has the function of a flame transfer groove, and for example, when the ignition needle is positioned outside the outer peripheral wall of the lower cover, the gas in the inner ring flame hole is ignited by the function of the flame holding groove.

In order to further solve the third technical problem, bosses protruding out of the upper surface of the upper cover are further arranged between each group of middle fire hole units and the outer periphery of the upper cover, each boss is C-shaped, a notch of each boss faces the center of the upper cover, two first middle fire holes in each group of middle fire hole units are located at two ends of the notch of each boss, a second middle fire hole is located in the middle of the notch of each boss, and the first middle fire holes and the second middle fire holes are gradually inclined from top to bottom from inside to outside. Therefore, due to the existence of the lug boss, overflowing liquid passes through the first middle fire hole and the second middle fire hole from the upper part of the lug boss, and the effect similar to a water curtain hole is formed; in addition, the inclined arrangement of the first middle fire hole and the second middle fire hole enables the sprayed airflow to impact the overflowing liquid and further enhance the effect of the water curtain hole, so that the overflowing liquid is not easy to enter the first middle fire hole and the second middle fire hole.

In order to reduce the influence of the spilled liquid on the fire gap, the outer periphery of the upper cover extends radially outwards further than the outer periphery of the lower cover, so that a blocking brim covering the outer periphery of the lower cover is formed.

The matching structure between the upper cover and the lower cover can be various, preferably, the inner periphery of the upper cover extends downwards to form a ring wall and rests on the inner periphery of the lower cover in a step matching mode, the ring wall of the inner periphery of the upper cover forms a first liquid guide hole, and the peripheral wall of the inner periphery of the lower cover forms a second liquid guide hole.

In order to reduce the influence of the overflowing liquid on the inner ring fire holes, the upper surface of the upper cover is an inward concave surface from the outer periphery to the inner periphery, the upper cover is provided with a plurality of liquid guide grooves which extend in the radial direction and are arranged at intervals, the lower end of each liquid guide groove is communicated with the first liquid guide hole, and the two adjacent inner ring fire holes are respectively positioned on two sides of the corresponding liquid guide groove.

The lower cover may have various structures, and preferably, the lower cover has an annular peripheral wall surrounding a bottom wall thereof and extending upward, an inner side wall of the annular peripheral wall gradually inclines from inside to outside from bottom to top, and the rib may be disposed on the inner side wall of the annular peripheral wall.

The technical scheme adopted by the invention for solving the fourth technical problem is as follows: the utility model provides an use combustor that has foretell split type fire lid, includes the supporting seat that is used for supporting split type fire lid, its characterized in that: an ignition needle adjacent to the outer peripheral edge of the split type fire cover is arranged on the supporting seat, and the upper end of the ignition needle is adjacent to one of the fire transmission grooves.

As the improvement, still including the furnace end that has the gas chamber, the supporting seat sets up in the furnace end top, and the furnace end has air inlet and the gas outlet in intercommunication gas chamber, the gas outlet has at least two and is close to the top edge circumference interval setting of furnace end, and each gas outlet all communicates the air guide hole of lower cover, and the supporting seat is close to its periphery department and is equipped with the through-hole of cover at the outer wall that corresponds the gas outlet, and the supporting seat is annular and the perisporium of internal periphery and forms the second air guide hole of third air guide hole and intercommunication lower cover, has the interval between furnace end and the supporting seat and forms the fourth air guide hole that communicates this third air guide hole. The gas outlets are provided with at least two gas outlets which are arranged at intervals in the circumferential direction and close to the upper edge of the furnace end, and each gas outlet is communicated with the gas guide hole of the lower cover, so that gas flow is dispersed to different gas outlets, the retention time of the gas flow in the furnace end is increased, the local gas flow components and the flow velocity change are prevented from being large, the overall gas flow components and the flow velocity are uniform, the flame temperature is uniform, and the smoke gas amount is reduced; the supporting seat is provided with a third liquid guide hole, a space is reserved between the furnace end and the supporting seat to form a fourth liquid guide hole, and the third liquid guide hole and the fourth liquid guide groove are arranged to facilitate guiding overflowing liquid out of the combustor; in addition, secondary air can enter from the fourth liquid guide hole, the third liquid guide hole, the second liquid guide hole and the first liquid guide hole in sequence and is supplemented to the inner ring fire hole, and full combustion of fuel gas is facilitated.

In order to guide the overflowing liquid, the liquid guide device also comprises a liquid containing disc arranged below the furnace end, and the liquid containing disc is in liquid communication with the fourth liquid guide hole.

Compared with the prior art, the invention has the advantages that: after the cooker overflows, the upper cover and the lower cover are cleaned separately, so that the fire gap is easy to clean; a plurality of convex ribs are arranged on the surface of the lower cover, which is adjacent to the outer periphery and is opposite to the upper cover, at intervals along the circumferential direction, and relatively independent gas channels are formed between the adjacent convex ribs, so that outer ring flames from the independent gas channels can be connected into a whole to be annular; because the fire coming out of the independent gas channel is large, the convex rib is contacted with the opposite surface of the upper cover without fire or is not contacted with the opposite surface of the upper cover and has small fire, so that the top of the formed flame is an independent flame, the secondary air is supplemented, and the full combustion of the gas is facilitated; the convex ribs guide the fuel gas to uniformly flow out along the radial direction, so that the generation of vortex is effectively reduced, and the flame is uniform and stable; all the convex ribs are arranged in a clockwise or anticlockwise rotation direction on the whole, and under the same size of the fire cover, the contact area of outer ring flame and the bottom of the cooker is increased, so that the heat efficiency is improved.

The combustor that is used to have this split type fire lid is provided with the ignition needle of the outer peripheral edges of neighbouring split type fire lid on this supporting seat, and the ignition needle can be convenient for install, and the upper end of this ignition needle is neighbouring one of them biography fire groove for it is better to pass the fire effect between annular play fire gap and the well ring fire hole unit.

Drawings

FIG. 1 is a schematic perspective view of a split fire cover according to an embodiment of the present invention;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a schematic view from another angle of FIG. 2;

FIG. 4 is a schematic side view of an upper cover of a split fire cover according to an embodiment of the present invention;

FIG. 5 is a schematic view of another angle of the upper cover of the split fire cover according to the embodiment of the present invention;

FIG. 6 is a cross-sectional view taken along line A-A of FIG. 5;

FIG. 7 is a cross-sectional view taken along line B-B of FIG. 5;

FIG. 8 is a cross-sectional view of the split fire lid of the embodiment of the present invention taken along the direction of FIG. 6C-C;

FIG. 9 is a longitudinal cross-sectional view of FIG. 1;

FIG. 10 is an enlarged view of detail I of FIG. 9;

FIG. 11 is an enlarged view of detail II of FIG. 9;

FIG. 12 is a longitudinal cross-sectional view at another angle of FIG. 1;

FIG. 13 is a schematic view of a burner according to an embodiment of the present invention;

FIG. 14 is a schematic view from another angle of FIG. 13;

FIG. 15 is an exploded view of FIG. 13;

FIG. 16 is a cross-sectional view taken along line D-D of FIG. 13;

FIG. 17 is a cross-sectional view taken along line E-E of FIG. 13;

FIG. 18 is a schematic view of a burner mounted on a cooktop panel;

fig. 19 is a longitudinal sectional view of fig. 18.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in fig. 1 to 12, a preferred embodiment of the split fire cover of the present invention is shown. The split fire lid comprises an upper lid 1 and a lower lid 2 both in the shape of a ring, wherein the upper lid 1 rests on the lower lid 2 and both have a gap adjacent to the outer periphery to form an annular fire gap 13;

the lower cover 2 has a ring-shaped peripheral wall 2b surrounding the bottom wall 2a and extending upwards, the inner side wall of the ring-shaped peripheral wall 2b is gradually inclined from inside to outside from bottom to top, and the convex rib 23 is arranged on the inner side wall of the ring-shaped peripheral wall 2 b; the lower cover 2 is provided with a plurality of convex ribs 23 at intervals along the circumferential direction on the surface which is adjacent to the outer circumferential edge and extends into the inner circumferential wall of the lower cover 2 and is opposite to the upper cover 1, relatively independent gas passages are formed between the adjacent convex ribs 23, and the convex ribs 23 are inclined relative to the circumferential line at the circumferential edge adjacent to the lower cover 2, so that all the convex ribs 23 are arranged in a clockwise rotation direction on the whole, and of course, all the convex ribs 23 can also be arranged in a counterclockwise rotation direction on the whole in other embodiments; each rib 23 is not in contact with the surface of the upper cover 1 opposite to the surface, and in other embodiments, the ribs 23 can be in contact with the surface of the upper cover 1 opposite to the surface;

the bottom wall 2a of the lower cover 2 is provided with a plurality of through air guide holes 22, the air guide holes 22 on the lower cover 2 are inclined holes, and the inclination angle alpha of the air guide holes 22 of the lower cover 2 relative to the horizontal plane is 40-60 degrees; the peripheral wall of the inner periphery of the lower cover 2 forms a second liquid guide hole 21;

the upper cover 1 is provided with 1 circle of inner ring fire holes 12 arranged along the circumferential direction at the corresponding position; the corresponding inner ring fire hole 12 on the upper cover 1 is also an inclined hole and has the same inclination direction with the air guide hole 22 at the corresponding position; the inclination angle beta of the inner ring fire hole 12 of the upper cover 1 relative to the horizontal plane is 40-60 degrees; all the inner ring fire holes 12 on the upper cover 1 are arranged in a counterclockwise rotating direction on the whole, at the moment, all the air guide holes 22 on the lower cover 2 are also arranged in a counterclockwise rotating direction on the whole, so that the gas flows out of the air guide holes 22 of the lower cover 2 and then enters the inner ring fire holes 12, all the convex ribs 23 are arranged in a clockwise rotating direction on the whole and are different from the rotating direction of all the air guide holes 22 of the lower cover 2 on the whole, and thus, the gas stays in the lower cover 2 for a longer time and is mixed more uniformly; of course, in other embodiments, all the inner ring fire holes 12 on the upper cover 1 may also be arranged in a clockwise direction, at this time, all the air vents 22 on the lower cover 2 are also arranged in a clockwise direction, so that the gas flows out from the air vents 22 of the lower cover 2 and then enters the inner ring fire holes 12, and all the ribs 23 are also arranged in a clockwise direction, so that the gas flows out from the air vents 22 of the lower cover 2 and then enters the fire outlet gap 13;

in order to effectively prevent the cooker overflow from blocking the fire hole, the outer periphery of the upper cover 1 further extends radially outwards relative to the outer periphery of the lower cover 2, so as to form a blocking brim 18 covering the outer periphery of the lower cover 2, and the blocking brim 18 is provided with an upward convex part 181; the inner periphery of the upper cover 1 extends downwards to form a ring wall and is placed on the inner periphery of the lower cover 2 in a step fit mode, and the ring wall of the inner periphery of the upper cover 1 forms a first liquid guide hole 11; the upper surface of the upper cover 1 is an inner concave surface from the outer periphery to the inner periphery, and is provided with a plurality of liquid guide grooves 16 which extend in the radial direction and are arranged at intervals, the lower end of each liquid guide groove 16 is communicated with a first liquid guide hole 21, and two adjacent inner ring fire holes 12 are respectively positioned at two sides of the corresponding liquid guide groove 16;

a plurality of groups of middle ring fire hole units 15 which are arranged along the circumferential direction are also arranged between the inner ring fire hole 12 and the outer periphery of the upper cover 1; the upper cover 1 is communicated with a group of middle fire hole units 15 through radially extending fire transfer grooves 6;

the bosses 17 protruding out of the upper surface of the upper cover 1 are further arranged between the outer peripheries of the middle fire hole units 15 and the upper cover 1 in each group, each boss 17 is C-shaped, a notch of each boss is towards the center of the upper cover 1, two first middle fire holes 151 in each group of middle fire hole units 15 are located at two ends of the notch of each boss 17, the second middle fire holes 152 are located at the middle positions of the notches of the bosses 17, and the first middle fire holes 151 and the second middle fire holes 152 are all inclined from inside to outside from top to bottom gradually.

The working principle and the use description of the split fire cover are as follows:

when in installation, the upper cover 1 is placed on the lower cover 2, and the inner ring fire hole 12 of the upper cover 1 is opposite to the air guide hole 22 of the lower cover 2 as much as possible;

the gas coming out of the annular fire outlet gap 13 is firstly ignited to form outer ring flame after being ignited by the ignition needle; then, through the fire transfer of the fire transfer groove 6 between the annular fire outlet gap 13 and the middle ring fire hole unit 15, the gas coming out of the first middle fire hole 151 and the second middle fire hole 152 in the middle ring fire hole unit 15 is ignited to form middle ring flame; then, under the action of the flame stabilizing groove 14 between the second middle fire hole 152 and the inner ring fire hole 12 (at this time, the flame stabilizing groove 14 also has the function of fire transfer), the fuel gas coming out of the inner ring fire hole 12 is ignited to form inner ring flame;

because the inner ring fire holes 12 are inclined holes, all the inner ring fire holes 12 are arranged in a counterclockwise rotary direction on the whole, and the formed inner ring flame is a rotary flame which can enable the flame to be combusted more fully and improve the contact area between the flame and the bottom of the pot;

the annular fire outlet gap 13 forms annular outer ring flame, an independent gas channel is formed between two adjacent convex ribs 23, and the outer ring flame from the independent gas channel can be connected into a whole to be annular; because the fire coming out of the independent gas channel is large, the convex rib 23 is contacted with the opposite surface of the upper cover 1 without fire or is not contacted with the opposite surface of the upper cover 1 but with small fire, so that the top of the formed flame is an independent flame, which is beneficial to the supplement of secondary air and the full combustion of the gas; the convex ribs 23 guide the fuel gas to uniformly flow out along the radial direction, so that the generation of vortex is effectively reduced, and the flame is uniform and stable; all the convex ribs 23 are arranged in a clockwise or anticlockwise rotation direction on the whole, under the same fire cover size, the contact area of outer ring flame and the bottom of the cooker is increased, and the heat efficiency is improved; thus, the inner ring flames from the corresponding air guide holes 22 vertically extend, and the outer ring flames from the annular fire outlet gap 13 transversely spread, so that the contact area between the flames and the bottom of the cooker is enlarged, the inner ring flames and the outer ring flames are prevented from interfering with each other, and the heating efficiency is improved;

when the liquid overflowing occurs, the overflowing liquid can drip from the blocking eaves 18 of the upper cover 1, and the influence of the overflowing liquid on the annular fire outlet gap 13 is reduced; the overflowing liquid can also flow into the first liquid guide hole 11 and the second liquid guide hole 21 through the liquid guide groove 16; the overflow liquid can flow to the upper surface of the boss 17, the overflow liquid flowing to the upper surface of the boss 17 is divided into two parts, wherein one part flows away from two ends of the notch of the boss 17 because the upper surface of the boss 17 is slightly inclined upwards and inwards, and the other part of the overflow liquid passes through the first middle fire hole 151 and the second middle fire hole 152 from above the boss 17 to form the effect similar to a water curtain hole; in addition, the first middle fire hole 151 and the second middle fire hole 152 are obliquely arranged, the sprayed airflow impacts overflowing liquid, and the effect of a water curtain hole is further enhanced, so that the overflowing liquid is not easy to enter the first middle fire hole 151 and the second middle fire hole 152;

after the occurrence of the cooker spill, the upper cover 1 and the lower cover 2 are separately cleaned, thereby easily cleaning the fire gap 13.

As shown in fig. 13 to 17, the present invention also provides a burner to which the above-described split fire cover is applied. FIGS. 18 to 19 are schematic views showing the burner of the present invention mounted on a panel of a cooktop. The burner comprises a liquid containing disc 5, a burner 4, a supporting seat 3 and a split type fire cover which are arranged from bottom to top in sequence, wherein an ignition needle 7 is arranged on the supporting seat 3;

wherein, the furnace end 4 is provided with a gas cavity; the burner 4 is provided with an air inlet 41 and an air outlet 42 which are communicated with the gas cavity, the air outlet 42 is provided with two air outlets which are arranged at intervals in the circumferential direction and close to the upper edge of the burner 4, and each air outlet 42 is communicated with the air guide hole 22 of the lower cover 2;

the supporting seat 3 is arranged above the burner 4 and used for supporting the split fire cover, a through hole 31 which is sleeved on the outer wall of the corresponding air outlet 42 is arranged at the position, close to the outer periphery, of the supporting seat 3, the supporting seat 3 is annular, a third liquid guide hole 32 is formed in the peripheral wall of the inner periphery, and the supporting seat is communicated with a second liquid guide hole 11 of the lower cover 2; a fourth liquid guide hole 43 communicated with the third liquid guide hole 32 is formed by a distance between the furnace end 4 and the supporting seat 3;

the ignition needle 7 is arranged on the supporting seat 3 and is adjacent to the outer periphery of the split type fire cover, and the upper end of the ignition needle 7 is adjacent to one of the fire transfer grooves 6;

the liquid containing disc 5 is planar so as to be convenient for cleaning, and is arranged between the furnace end 4 and the panel 10 of the stove, and the liquid containing disc 5 is in liquid circulation with the fourth liquid guide hole 43.

The working principle and the using process of the burner are as follows:

a liquid containing disc 5 is arranged on a panel 10 of the stove, a burner 4 is arranged on the liquid containing disc 5, a supporting seat 3 is arranged on the burner 4, so that a through hole 31 of the supporting seat 3 is sleeved outside the outer wall of an air outlet 42 of the burner 4, and a split fire cover is arranged on the supporting seat 3; the gas enters the gas cavity through the gas inlet 41 and then is discharged through the gas outlet 42, and the gas outlet 42 is communicated with the gas guide hole 22 of the lower cover 2;

the ignition needle 7 is arranged outside the outer periphery of the lower cover 2 and below the baffle ledge 18 of the upper cover 1; after the ignition needle 7 is ignited, fire is transferred between the annular fire outlet gap 13 and the middle ring fire hole unit 15 through the fire transfer groove 6;

the arrangement of the two air outlets 42 increases the retention time of the fuel gas in the furnace end 4, avoids large change of local fuel gas components and flow rate, enables the overall components and flow rate of the fuel gas to be uniform, enables the flame temperature to be uniform, and reduces the amount of flue gas; then, the fuel gas enters the lower concave surface of the lower cover 2 through the gas guide hole 22 of the lower cover 2, and then inner ring flame, middle flame and outer ring flame are formed according to the working principle of the split type fire cover;

when the cooker overflows, the overflow can drop from the brim 18 of the upper cover 1, so that the influence of the overflow on the annular fire gap 13 is reduced; the overflowing liquid can flow into the liquid containing tray 5 after flowing into the first liquid guide hole 11, the second liquid guide hole 21, the third liquid guide hole 32 and the fourth liquid guide hole 43 through the liquid guide groove 16; the overflow liquid can flow to the upper surface of the boss 17, the overflow liquid flowing to the upper surface of the boss 17 is divided into two parts, wherein one part flows away from two ends of the notch of the boss 17 because the upper surface of the boss 17 is slightly inclined upwards and inwards, and the other part of the overflow liquid passes through the first middle fire hole 151 and the second middle fire hole 152 from above the boss 17 to form the effect similar to a water curtain hole; in addition, the first middle fire hole 151 and the second middle fire hole 152 are obliquely arranged, the sprayed airflow impacts overflowing liquid, and the effect of a water curtain hole is further enhanced, so that the overflowing liquid is not easy to enter the first middle fire hole 151 and the second middle fire hole 152; thus effectively preventing the overflowing liquid of the cooker from blocking the fire hole;

in addition, secondary air can enter the inner ring fire hole 12 through the fourth liquid guide hole 43, the third liquid guide hole 32, the second liquid guide hole 21 and the first liquid guide hole 11 in sequence and is supplemented to the inner ring fire hole 12, and full combustion of gas is facilitated.

Claims

1. A split fire lid comprising an upper lid (1) and a lower lid (2) both annular in shape, wherein the upper lid (1) rests on the lower lid (2) and both have a gap at least adjacent the outer periphery to form an annular fire gap (13), characterized in that: the lower cover (2) is provided with a plurality of convex ribs (23) at intervals along the circumferential direction at least on the surface adjacent to the outer periphery and opposite to the upper cover (1), relatively independent gas channels are formed between the adjacent convex ribs (23), and the convex ribs (23) are inclined relative to the peripheral line at least at the periphery adjacent to the lower cover (2), so that all the convex ribs (23) are arranged in a clockwise or anticlockwise rotating direction on the whole;

the lower cover (2) is provided with a plurality of through air vents (22) on the bottom wall (2a), and the upper cover (1) is provided with at least one circle of inner ring fire holes (12) which are arranged along the circumferential direction at the corresponding position.

2. The split fire cover of claim 1, wherein: the air guide holes (22) on the lower cover (2) are inclined holes, and the inner ring fire holes (12) corresponding to the upper cover (1) are also inclined holes and have the same inclination direction as the air guide holes (22) at the corresponding positions.

3. The split fire cover of claim 2, wherein: all the inner ring fire holes (12) on the upper cover (1) are arranged in a clockwise or anticlockwise spiral direction on the whole.

4. The split fire cover of claim 2, wherein: the inclination angle d of the air guide hole (22) of the lower cover (2) relative to the horizontal plane is 40-60 degrees.

5. The split fire cover of claim 2, wherein: the inclination angle beta of the inner ring fire hole (12) of the upper cover (1) relative to the horizontal plane is 40-60 degrees.

6. The split fire cover of claim 1, wherein: and a plurality of groups of middle ring fire hole units (15) which are arranged along the circumferential direction are also arranged between the inner ring fire hole (12) and the outer periphery of the upper cover (1).

7. The split fire cover of claim 6, wherein: the upper cover (1) is communicated with at least one group of middle fire hole units (15) through radially extending fire transfer grooves (6).

8. The split fire cover of claim 6, wherein: fire hole unit (15) in every group is including being fire hole (151) in the middle of two first that the delta-shaped was arranged and being located fire hole (152) in the middle of the second between two first fire holes (151), fire hole (152) are linked together through radially extending flame stabilizing slot (14) with corresponding inner ring fire hole (12) in the middle of the second.

9. The split fire cover of claim 8, wherein: still be provided with boss (17) of protrusion in upper cover (1) upper surface between the outer peripheral edges of each group middle fire hole unit (15) and upper cover (1), every boss (17) are the C font and its notch towards the center of upper cover (1), two first middle fire holes (151) in each group middle fire hole unit (15) are located the both ends position of boss (17) notch, fire hole (152) are located the intermediate position of boss (17) notch in the middle of the second, and equal top-down of first middle fire hole (151), second middle fire hole (152) incline from inside to outside gradually.

10. The split type fire cover according to any one of claims 1 to 9, wherein: the outer periphery of the upper cover (1) is further extended outwards in the radial direction relative to the outer periphery of the lower cover (2), so that a blocking brim (18) covering the outer periphery of the lower cover (2) is formed.

11. The split type fire cover according to any one of claims 1 to 9, wherein: the inner periphery of the upper cover (1) extends downwards to form a ring wall and is placed on the inner periphery of the lower cover (2) in a step fit mode, the ring wall of the inner periphery of the upper cover (1) forms a first liquid guide hole (11), and the peripheral wall of the inner periphery of the lower cover (2) forms a second liquid guide hole (21).

12. The split fire cover of claim 11, wherein: the upper surface of the upper cover (1) is an inward concave surface from high to low from the outer periphery to the inner periphery, and is provided with a plurality of liquid guide grooves (16) which extend in the radial direction and are arranged at intervals, the lower end of each liquid guide groove (16) is communicated with the first liquid guide hole (11), and the two adjacent inner ring fire holes (12) are respectively positioned at two sides of the corresponding liquid guide groove (16).

13. The split type fire cover according to any one of claims 1 to 9, wherein: the lower cover (2) is provided with an annular peripheral wall (2b) which surrounds the bottom wall (2a) and extends upwards, the inner side wall of the annular peripheral wall (2b) gradually inclines from inside to outside from bottom to top, and the convex rib (23) is arranged on the inner side wall of the annular peripheral wall (2 b).

14. A burner applied with a split type fire cover as set forth in any one of claims 7 to 13, comprising a support base (3) for supporting the split type fire cover, characterized in that: an ignition needle (7) adjacent to the outer periphery of the split type fire cover is arranged on the supporting seat (3), and the upper end of the ignition needle (7) is adjacent to one of the fire transfer grooves (6).

15. The burner of claim 14, wherein: still including furnace end (4) that have the gas chamber, supporting seat (3) set up in furnace end (4) top, furnace end (4) have air inlet (41) and gas outlet (42) that communicate the gas chamber, gas outlet (42) have at least two and be close to the top edge circumference interval setting of furnace end (4), each gas outlet (42) all communicate air guide hole (22) of lower cover (2), supporting seat (3) are close to its periphery department and are equipped with through-hole (31) of the outer wall of cover corresponding gas outlet (42), supporting seat (3) are annular and the perisporium of internal periphery and form third drain hole (32) and communicate second drain hole (11) of lower cover (2), have the interval between furnace end (4) and supporting seat (3) and form fourth drain hole (43) that communicate this third drain hole (32).

16. The burner of claim 15, wherein: the liquid storage tray is arranged below the furnace end (4), and the liquid storage tray (5) is in liquid communication with the fourth liquid guide hole (43).