阅读说明：本技术 一种用于燃气灶的燃烧器 (Burner for gas stove ) 是由 史丽莎 朱志新 茅忠群 诸永定 蔡国汉 于 2020-04-15 设计创作，主要内容包括：本发明涉及一种用于燃气灶的燃烧器,包括有底座,设置在底座之上第一火盖,并且与底座之间形成有位于中央的第一混气室、同样设置在底座之上,并且与底座之间形成有位于第一混气室外围的第一混气室的第二火盖,其特征在于：还包括有二次空气补气室,与现有技术相比,本发明的优点在于相邻的第一混气室和第三混气室均为独立供气,为了避免因第一火盖和第三火盖燃烧时产生的燃烧热影响第二火盖的二次空气补给,第二混气室上设置的两排火孔中,靠近第一混气室的第一出火孔靠近二次空气补充室,能较为独立地补充二次空气,而靠近第三混气室的第三出火孔依靠导流件补给二次空气,从而避免第二混气室的第二火盖燃烧时因二次空气不足产生的烟气超标。(The invention relates to a burner for a gas stove, which comprises a base, a first fire cover arranged on the base, a first gas mixing chamber positioned at the center and a second fire cover which is also arranged on the base and a first gas mixing chamber positioned at the periphery of the first gas mixing chamber and formed between the first fire cover and the base, and is characterized in that: the secondary air supplementing chamber is also included, compared with the prior art, the secondary air supplementing chamber has the advantages that the adjacent first air mixing chamber and the adjacent third air mixing chamber are independently supplied with air, in order to avoid that the secondary air supplementing of the second fire cover is influenced by the combustion heat generated when the first fire cover and the third fire cover are combusted, in the two fire holes arranged on the second air mixing chamber, the first fire outlet hole close to the first air mixing chamber is close to the secondary air supplementing chamber and can supplement the secondary air relatively independently, and the third fire outlet hole close to the third air mixing chamber depends on the flow guide piece to supplement the secondary air, so that the smoke generated by insufficient secondary air when the second fire cover of the second air mixing chamber is combusted is prevented from exceeding standard.)

1. A burner for gas stove comprises

A base (1);

the first fire cover (2) is arranged on the base (1), and a first gas mixing chamber (21) located in the center is formed between the first fire cover and the base (1);

the second fire cover (3) is also arranged on the base (1), and a second air mixing chamber (31) positioned at the periphery of the first air mixing chamber (21) is formed between the second fire cover and the base (1); the method is characterized in that:

the first fire outlet holes (32) are arranged on the second fire cover (3) at intervals along the circumferential direction and are close to the first fire cover (2);

the second fire outlet holes (33) are arranged on the second fire cover (3) at intervals along the circumferential direction and are closer to the radial outer side of the second fire cover (3) than the first fire outlet holes (32);

the third fire cover (7) is arranged on the base (1), and a third gas mixing chamber (71) positioned at the periphery of the second gas mixing chamber (31) is formed between the third fire cover (7) and the base (1);

the secondary air supplementing chamber (4) is formed between the first air mixing chamber (21) and the second air mixing chamber (31), the secondary air supplementing chamber (4) is provided with a top wall (41) of an air outlet (411) and a bottom wall (42) opposite to the top wall (41), and the bottom wall (42) is provided with an air inlet (421) communicated with outside air and the air outlet (411); and

and the flow guide piece (5) is arranged in the air outlet (411), and secondary air in the secondary air supplementing chamber (4) can be guided into the fire outlet areas of the second fire outlet holes (33) and/or the first fire outlet holes (32) by means of the flow guide piece (5).

2. Burner for gas cooktops according to claim 1, characterized in that: the flow guide piece (5) comprises at least one flow guide sheet (51) corresponding to the fire outlet area of each second fire outlet hole (33).

3. Burner for gas cooktops according to claim 2, characterized in that: the height of the root (511) of each guide vane (51) is lower than that of the free end (512), and the guide vanes are gradually inclined upwards from bottom to top.

4. Burner for gas cooktops according to claim 3, characterized in that: each guide vane (51) is formed by punching the guide piece (5) and directly bending.

5. Burner for gas cooktops according to claim 4, characterized in that: flow guide channels (35) are arranged between the adjacent second fire outlets (33), and each flow guide channel (35) is aligned with the corresponding flow guide sheet (51) one by one.

6. The burner for a gas range according to any one of claims 2 to 5, wherein: the upper surface of the bottom of the flow guide piece (5) is provided with a concave annular liquid collecting groove (50) at the periphery of the free end (512) or the root (511) of each flow guide sheet (51).

7. Burner for gas cooktops according to claim 6, characterized in that: the center of the first air mixing chamber (21) is provided with a mounting chamber (20) independent of the first air mixing chamber (21), the mounting chamber (20) is used for accommodating an ignition needle and/or a thermocouple, and the first fire cover (2) is provided with a communication port corresponding to the position of the ignition needle and/or the thermocouple.

8. Burner for gas cooktops according to claim 7, characterized in that: the top of the mounting chamber (20) is provided with a waterproof brim (6).

9. Burner for gas cooktops according to claim 8, characterized in that: the third fire cover (7) and the first fire cover (2) are both mesh fire covers, and the third fire cover (7) and the first fire cover (2) form a V shape.

10. Burner for gas cooktops according to claim 9, characterized in that: the third gas mixing chamber (71) comprises an outer annular wall (712) and a bottom annular wall (713) connecting the inner annular wall (711) and the outer annular wall (712), wherein the inner annular wall (711) comprises an upper inner annular wall (711a) and a lower inner annular wall (711b), the lower end of the upper inner annular wall (711a) is circumferentially provided with at least one inner convex column (714), the lower inner annular wall (711a) is provided with an inner guide seat (7111b) matched with the lower end of the inner convex column (714) at a position corresponding to the inner convex column (714), the outer annular wall (712) comprises an upper outer annular wall (712a) and a lower outer annular wall (712b), the lower end of the upper outer annular wall (712a) is circumferentially provided with at least one outer convex column (715), and the lower outer annular wall (712b) is provided with an outer guide seat (7121b) matched with the lower end of the outer convex column (715) at a position corresponding to the outer convex column (715), the bottom ring wall (713) is provided with a driving piece connected with the lower ends of the inner convex column (714) and the outer convex column (715), and the driving piece can drive the upper inner ring wall (711a) and the upper outer ring wall (712a) to be communicated with the third fire cover (7) to move vertically.

Technical Field

The invention relates to the technical field of household kitchen utensils, in particular to a burner for a gas stove.

Background

At present, although secondary air is not needed in the combustion of the infrared combustor on the market, primary air is completely injected and provided by nature, but the volume is heavy in order to ensure that gas and air are mixed fully and uniformly, a longer mixing pipe or a very large mixing cavity is needed, so that the diameter of a combustion disc is larger than that of an atmospheric combustor, about 150mm, and the actual thermal efficiency of a small sharp-bottomed pot is greatly reduced. And although the thermal efficiency of the infrared burner is higher than that of an atmospheric burner, the increase of the thermal load needs to be multiplied by the diameter of the burner, and the infrared burner cannot meet the civil requirement. Therefore, the heat flow of the burner is only about 3.5kW, and the heat flow is not suitable for the habit of fiercely frying and stir-frying by Chinese people, so the market occupancy is small.

In order to meet the cooking habit of the people in China, the existing infrared burner forms half-infrared half-atmosphere combustion by adding an atmosphere burner at the outer side or the inner side of the burner so as to improve the heat load, for example, the infrared atmosphere two-in-one gas burner of the Chinese utility model patent ZL200420022626.4 (with the publication number of CN2702183Y) comprises a burning head, the upper part of the burning head is concave-nest-shaped, a burning cavity is arranged in the middle, a gas mixing cavity is arranged at the periphery of the burning cavity, the bottom parts of the burning cavity and the gas mixing cavity are both connected with an injection pipe, the bottom end of the injection pipe is provided with a gas nozzle, a fire cover is arranged in the burning cavity and connected with the injection pipe, a plurality of infrared radiation plates are arranged on the inclined plane of the gas mixing cavity, the gas enters the burning cavity and the gas mixing cavity from the two injection pipes respectively, the atmosphere burning cavity burns, and the inclined plane on the gas mixing chamber is infrared type burning, realizes infrared atmosphere two-in-one combined type burning, has simple structure, combustion effect characteristics such as good. Or can also refer to a new burner combining infrared and atmospheric combustion in the Chinese utility model patent with patent number 201220408192.6 (No. CN202747327U), the burner includes a burner base, a burner body and a burner upper cover, the burner body is positioned on the burner base, the burner upper cover includes an inner ring fire cover and an outer ring fire cover, the inner ring fire cover is provided with an inner ring fire hole, the outer ring fire cover is provided with an outer ring fire hole, and the inner ring fire cover and the outer ring fire cover are positioned on the upper end of the burner body; the burner is characterized by also comprising a plurality of ejector pipes, wherein one port of one ejector pipe is communicated with an inner ring fire hole on an inner ring fire cover, one ports of the other ejector pipes are communicated with an outer ring fire hole on an outer ring fire cover, the burner effectively improves the utilization rate of gas and reduces the emission of waste gas by combining an infrared micro-flame combustion technology adopted by the outer ring fire cover and an atmospheric open fire combustion technology adopted by the inner ring fire cover, or the burner comprises an inner ring combustion device, a middle ring combustion device and an outer ring combustion device in Chinese invention patent application No. CN201610861607.8 (with the publication No. CN 106287716A); one of the inner ring combustion device, the middle ring combustion device and the outer ring combustion device is a fully premixed infrared combustion device, and the other one is an atmospheric combustion device; 2 of the inner ring combustion device, the middle ring combustion device and the outer ring combustion device are full-premix infrared combustion devices, and the rest is an atmospheric combustion device, so that the pot is uniformly heated, and the requirements of large load and high energy efficiency can be met; 2 full-premix infrared combustion devices are selected, so that the emission of NOx and CO in the smoke is reduced, and the requirement of environmental protection is met; the number of the atmospheric combustion devices is 1, which is selected to increase firepower, but when the combination of the burners comprises an inner ring combustion device and an outer ring combustion device which are fully premixed infrared combustion devices, and the middle ring combustion device is an atmospheric burner, the atmospheric burner of the middle ring can easily generate yellow flame, backfire and other defects because of the mutual entrainment of hot air flow after the combustion of the inner ring combustion device and the outer ring combustion device and the high temperature of the inner ring combustion device and the outer ring combustion device on secondary air of the atmospheric burner of the middle ring; in addition, the fire outlet of the atmospheric burner of the middle ring is easy to be blocked by overflowing liquid.

Disclosure of Invention

The first technical problem to be solved by the present invention is to provide a burner for a gas range, which can ensure sufficient secondary air in the middle ring area of the burner, in view of the above-mentioned prior art.

The second technical problem to be solved by the present invention is to provide a burner for a gas stove, which heats a pot bottom uniformly, in view of the above-mentioned prior art.

The technical scheme adopted by the invention for solving the first technical problem is as follows: the burner for the gas stove comprises

A base;

the first fire cover is arranged on the base, and a first gas mixing chamber positioned in the center is formed between the first fire cover and the base;

the second fire cover is also arranged on the base, and a first gas mixing chamber positioned at the periphery of the first gas mixing chamber is formed between the second fire cover and the base; the method is characterized in that:

the first fire outlet holes are circumferentially arranged on the second fire cover at intervals and are close to the first fire cover;

the second fire outlet holes are circumferentially arranged on the second fire cover at intervals and are closer to the radial outer side of the second fire cover than the first fire outlet holes;

the third fire cover is arranged on the base, and a third gas mixing chamber positioned at the periphery of the second gas mixing chamber is formed between the third fire cover and the base;

the secondary air supplementing chamber is formed between the first air mixing chamber and the second air mixing chamber, the secondary air supplementing chamber is provided with a top wall of an air outlet and a bottom wall opposite to the top wall, and the bottom wall is provided with an air inlet communicated with outside air and the air outlet; and

and the flow guide piece is arranged in the air outlet, and the secondary air in the secondary air supply chamber can be guided into the fire outlet areas of the second fire outlet holes and/or the first fire outlet holes by means of the flow guide piece.

Because the second goes out the fire hole and compares first fire hole, is more close to the radial outside of second fire lid, and the secondary air of secondary air supply room is because participated in the burning of first fire hole front end, and secondary air reduces for this reason, and secondary air is walked towards the second fire hole and is replenished the difficulty more, avoids influencing the secondary air in the secondary air tonifying qi room because of the heat of combustion in first fire hole and is difficult to replenish to second fire hole, preferably, the water conservancy diversion spare is including the regional at least one water conservancy diversion piece that corresponds of going out the fire with each second fire hole.

In order to achieve faster replenishment of secondary air to the second fire outlet, it is preferable that the root of each of the guide vanes is lower than the free end thereof and gradually inclines upward from bottom to top.

From the viewpoint of simple processing, it is preferable that each of the guide vanes is formed by directly bending the guide punched hole.

Furthermore, flow guide channels are arranged between the adjacent second fire outlet holes, and each flow guide channel is aligned with the corresponding flow guide piece one by one. Be provided with the water conservancy diversion passageway between going out the fire hole by adjacent second, can make and supply to the water conservancy diversion passageway in through the leading-in secondary air of water conservancy diversion piece better, and then the secondary air can supply to the root that the second goes out the fire hole better, each water conservancy diversion passageway is rotatory along clockwise better, thereby make the secondary air can rotate and then supply to the second better and go out the fire hole, in addition because the pot edge that the pan was followed easily to the overflow in culinary art process overflows, the overflow gets into the advanced water conservancy diversion passageway of changing of the upper surface of fire lid, final overflow gets into annular collecting tank, play the guard action, in order to avoid the overflow to block up the second and go out the fire hole.

Preferably, the upper surface of the bottom of the flow guide member is provided with a recessed annular liquid collecting groove at the periphery of the free end or the root of each flow guide sheet, and the annular liquid collecting groove is positioned at the lower end of the flow guide channel. The annular liquid collecting groove can collect overflow liquid flowing out of the flow guide channel on one hand, and can prevent the overflow liquid from entering the secondary air replenishing chamber on the other hand.

Further, the center of the first air mixing chamber is provided with a mounting chamber independent from the first air mixing chamber, the mounting chamber is used for accommodating an ignition needle and/or a thermocouple, and the first fire cover is provided with a communication port corresponding to the ignition needle and/or the thermocouple. The ignition needle and the thermocouple can be replaced by the ion needle, the ignition needle and the thermocouple or the ion needle are hidden in the installation chamber through the installation chamber so as to improve the use environment of the ignition needle and/or the thermocouple or the ion needle, on one hand, the overflowing liquid can be prevented from entering the installation chamber, on the other hand, the ignition needle and/or the thermocouple can be effectively protected from the surrounding wind power, further, the ignition success rate of the ignition needle and/or the ignition rate of the thermocouple are improved, and meanwhile, the service life of the ignition needle and/or the thermocouple can be prolonged.

In order to prevent the spilled liquid from affecting the ignition needle and/or the thermocouple, the top of the installation chamber is preferably provided with a waterproof brim.

Further, the third fire cover and the first fire cover are both mesh fire covers, and the third fire cover and the first fire cover form a V shape. Therefore, the first fire cover, the second fire cover and the third fire cover form inner, middle and outer three-ring independent air supply, the inner and outer ring infrared combustion formed by the mesh type fire covers can inject excessive primary air, after self infrared combustion is met, redundant primary air and a secondary air supplement chamber can jointly supply secondary air to the second fire cover positioned in the middle ring, and the smoke generated by insufficient secondary air in the middle ring can be avoided exceeding the standard.

Further, the third gas mixing chamber comprises an inner ring wall and an outer ring wall which are arranged at intervals and a bottom ring wall which is connected with the inner ring wall and the outer ring wall, wherein the inner ring wall comprises an upper inner ring wall and a lower inner ring wall, the lower end of the upper inner ring wall is provided with at least one inner convex column along the circumferential direction, the lower inner ring wall is provided with an inner guide seat matched with the lower end of the inner convex column at the position corresponding to the inner convex column, the outer ring wall comprises an upper outer ring wall and a lower outer ring wall, the lower end of the upper outer ring wall is provided with at least one outer convex column along the circumferential direction, the lower outer ring wall is provided with an outer guide seat matched with the lower end of the outer convex column at the position corresponding to the outer convex column, the bottom ring wall is provided with a driving piece connected with the lower ends of the inner convex column and the outer convex column, and the driving piece can drive the upper inner ring wall and the upper outer ring wall to be communicated with the third fire cover to move vertically. When a user uses a small-size soup pot or milk pot to stew, the third fire cover is descended below the panel to be used as a heat collecting cover, the inner convex column and the outer convex column are both connected to a driving structure such as a motor to synchronously control the inner convex column and the outer convex column to ascend and descend, and the outer ring valve body is controlled to be in linkage air-off state.

Compared with the prior art, the invention has the advantages that the adjacent first air mixing chamber and the third air mixing chamber are independently supplied with air, so that the secondary air supply of the second fire cover is avoided due to the influence of combustion heat generated when the first fire cover and the third fire cover are combusted, in the two fire holes arranged on the second air mixing chamber, the first fire outlet hole close to the first air mixing chamber is close to the secondary air supply chamber to independently supply secondary air, and the third fire outlet hole close to the third air mixing chamber supplies secondary air by virtue of the flow guide piece, so that the over standard of smoke generated due to insufficient secondary air when the second fire cover of the second air mixing chamber is combusted is avoided, and the combustion efficiency can be effectively improved.

Drawings

FIG. 1 is a schematic view of a burner in accordance with embodiment 1 of the present invention;

FIG. 2 is a schematic structural view of a flow guide member in embodiment 1 of the present invention;

FIG. 3 is a cross-sectional view of FIG. 1;

FIG. 4 is a schematic structural view illustrating a burner according to embodiment 1 of the present invention, in which a third burner cap is lowered below a panel to serve as a heat collecting cover;

FIG. 5 is a cross-sectional view of FIG. 4;

FIG. 6 is a schematic view showing the structure of a burner in embodiment 3 of the present invention;

fig. 7 is a schematic structural view of a flow guide member in embodiment 3 of the present invention;

FIG. 8 is a schematic view showing the structure of a burner in embodiment 4 of the present invention;

FIG. 9 is a cross-sectional view of FIG. 8;

fig. 10 is a schematic structural view of a flow guide member in embodiment 4 of the present invention.

Detailed Description

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

Example 1

As shown in FIGS. 1 to 5, the preferred embodiment of the present invention is shown. The burner for the gas stove of the embodiment comprises a base 1; the first fire cover 2 is arranged on the base 1, a first air mixing chamber 21 positioned in the center is formed between the first fire cover 2 and the base 1, the second fire cover 3 is also arranged on the base 1, and a first air mixing chamber 21 positioned at the periphery of the first air mixing chamber 21 is formed between the second fire cover 3 and the base 1; the second fire cover 3 is provided with first fire holes 32 close to the first fire cover 2 at intervals along the circumferential direction and second fire holes 33 arranged on the second fire cover 3 at intervals along the circumferential direction, and compared with the first fire holes 32, the second fire holes 33 are closer to the radial outer side of the second fire cover 3; a secondary air replenishing chamber 4 is formed between the first air mixing chamber 21 and the second air mixing chamber 31, the secondary air replenishing chamber 4 is provided with a top wall 41 of an air outlet 411 and a bottom wall 42 opposite to the top wall 41, the bottom wall 42 is provided with an air inlet 421 communicated with the outside air and the air outlet 411, a flow guide part 5 is further arranged in the air outlet 411, and the secondary air in the secondary air replenishing chamber 4 can be guided into the fire outlet area of each second fire outlet 33 by the flow guide part 5. The adjacent first air mixing chamber 21 and the second air mixing chamber 31 are independent air supplies, the first fire cover 2 corresponding to the first air mixing chamber 21 can form an infrared burner for a mesh-type fire cover, two fire holes are formed in the second air mixing chamber 31, the first fire hole 32 close to the first air mixing chamber 21 is close to a secondary air supplementing chamber, secondary air can be supplemented relatively independently, the situation that combustion heat generated when the first fire cover 2 burns influences the supplement of the secondary air is avoided, the situation that smoke generated due to insufficient secondary air exceeds the standard when the second fire cover 3 of the second air mixing chamber 31 burns is avoided, and the infrared burner and the atmospheric burner are combined to effectively improve the combustion efficiency. In order to facilitate ignition and fire protection, the first air mixing chamber 21 is centrally provided with a mounting chamber 20 independent from the first air mixing chamber 21, the mounting chamber 20 is used for accommodating an ignition needle and/or a thermocouple, the first fire cover 2 is provided with a communication port corresponding to the position of the ignition needle and/or the thermocouple, the embodiment can also replace the ignition needle and the thermocouple by an ion needle 40, the ignition needle and the thermocouple/ion needle 40 are hidden in the installation chamber 20 by the installation chamber 20 to improve the use environment of the ignition needle and/or the thermocouple/ion needle 40, so that, on one hand, the leakage of liquid into the installation chamber 20 can be prevented, and on the other hand, the ignition needle and/or the thermocouple/ion needle 40 can be effectively protected from the surrounding wind, thereby improving the ignition success rate of the ignition needle and/or the fire retention rate of the thermocouple or the ion needle 40 and simultaneously prolonging the service life of the ignition needle and/or the thermocouple or the ion needle 40. In order to prevent the flash from affecting the ignition needle and/or the thermocouple or ion needle 40, it is preferable that the top of the installation chamber 20 has a waterproof eaves 6.

Specifically, the burner comprises a third fire cover 7 arranged on the base 1, a third air mixing chamber 71 positioned at the periphery of the second air mixing chamber 31 is formed between the third fire cover 7 and the base 1, the third fire cover 7 and the first fire cover 2 form a V shape, the first fire cover 2 and the third fire cover 7 are mesh type fire covers, wherein the included angle of the V shape is 90-180 degrees, so that the first fire cover 2 and the third fire cover 7 and the base 1 can jointly form an infrared burner positioned at the center and the periphery, the second fire cover 3 positioned between the first fire cover 2 and the third fire cover 7 and the base 1 jointly form an atmospheric burner in the middle, flames formed on the first fire cover 2 and the third fire cover 7 can be evenly dispersed on the mesh type fire covers to form short flames, the flames are not easy to fly, the combustion efficiency is increased, the thermal efficiency is improved, the carbon monoxide emission is reduced, and the first fire cover 2 and the third fire cover 7 are of an inner mesh type structure equivalent to high temperature, The outer radiation plate and the outer radiation plate can perform radiation heating mutually, so that the temperature of the radiation plate body is increased, the temperature difference between the radiation plate and the pot bottom is increased, and radiation heat transfer is improved; in addition, the inner and outer radiation plates form a high-temperature radiation environment above the second fire cover 3 of the middle ring, which is beneficial to the sufficient combustion of the second fire cover 3 of the middle ring, thereby improving the overall thermal efficiency of the burner. Preferably, the third air mixing chamber 71 includes an inner annular wall 711 and an outer annular wall 712 arranged at intervals, and a bottom annular wall 713 connecting the inner annular wall 711 and the outer annular wall 712, wherein the inner annular wall 711 includes an upper inner annular wall 711a and a lower inner annular wall 711b, the lower end of the upper inner annular wall 711a is circumferentially provided with at least one inner boss 714, the lower inner annular wall 711b is provided with an inner guide seat 7111b corresponding to the lower end of the inner boss 714, the outer annular wall 712 includes an upper outer annular wall 712a and a lower outer annular wall 712b, the lower end of the upper outer annular wall 712a is circumferentially provided with at least one outer boss 715, the lower outer annular wall 712b is provided with an outer guide seat 7121b corresponding to the lower end of the outer boss 715, the bottom annular wall 713 is provided with a driving member connected to the lower ends of the inner boss 714 and the outer boss 715, the driving member can drive the upper inner annular wall 711a and the upper outer annular wall 712a to communicate with the third fire cover 7 to move vertically, when a user uses a small-sized soup pot or milk pot for stewing, the third fire cover 7 descends below the panel 100 to be used as a heat collecting cover, the inner convex column 714 and the outer convex column 715 are both connected to a driving structure such as a motor to synchronously control the stable lifting of the driving structure, and the outer ring valve body is controlled to be in linkage air-off state when the driving structure descends. In addition, because the second fire outlet 33 is closer to the radial outer side of the second fire cover 3 than the first fire outlet 32, the secondary air in the secondary air supplement chamber participates in the combustion of the front end of the first fire outlet 32, so the amount of the secondary air is reduced, the secondary air is difficult to supplement to the second fire outlet, in order to avoid that the secondary air in the secondary air supplement chamber 4 is difficult to supplement to the second fire outlet 33 due to the combustion heat of the first fire outlet 32, the flow guide piece 5 comprises at least one flow guide sheet 51 corresponding to the fire outlet area of each second fire outlet 33, in order to achieve that the secondary air is supplemented to the second fire outlet 33 more quickly, the height of the root 511 of each flow guide sheet 51 is lower than that of the free end 512, and the flow guide sheet is inclined upwards gradually from bottom to top, and from the viewpoint of simple processing, each flow guide sheet 51 is formed by directly bending the flow guide piece 5 punched hole.

When the secondary air injection device works, secondary air enters through the air inlet 421 of the secondary air supplement chamber, gas and primary air are introduced through the corresponding first injection pipes 710 of the first gas mixing chamber 21 and the third gas mixing chamber 71 respectively, mesh type fire covers of the first gas mixing chamber 21 and the third gas mixing chamber 71 are ignited under the ignition action of the ion needle, sufficient combustion reaction is generated, inner and outer ring fire is respectively formed, the mesh type fire covers are in a mesh shape, the problem of uneven temperature distribution of flame and flame can be well solved, in addition, the second gas mixing chamber 31 positioned between the first gas mixing chamber 21 and the third gas mixing chamber 71 is introduced through the second injection pipe 310, the gas and the primary air flow out through the first fire outlet hole 32 and the second fire outlet hole 33 on the second gas mixing chamber 31, the mixed primary air and gas finally pass through the first fire outlet hole 32 and the second fire outlet hole 33 and are ignited together with the secondary air of the secondary air supplement chamber from the inner ring fire, and after the first air mixing chamber 21 and the third air mixing chamber 71 meet self infrared combustion, redundant primary air can be supplied to the second air mixing chamber 31 positioned in the middle ring, so that the smoke generated by insufficient secondary air of the middle ring can be prevented from exceeding the standard.

Example 2

As shown in fig. 1 and 3, the structure is substantially the same as that of embodiment 1, the only difference being: be provided with water conservancy diversion passageway 35 between adjacent second fire outlet 33, every water conservancy diversion passageway 35 and the respective water conservancy diversion piece 51 that corresponds one-to-one alignment setting, be provided with water conservancy diversion passageway 35 between the adjacent second fire outlet 33, can make through leading-in secondary air of water conservancy diversion piece 51 supply better to water conservancy diversion passageway 35 in, and then the secondary air can supply better to the root 511 of second fire outlet 33, each water conservancy diversion passageway 35 rotates along the clockwise better, thereby make the secondary air can rotate and then supply better to second fire outlet 33, in addition because the pot edge that the pot was followed the pan easily to the overflow in the culinary art process spills over, the overflow gets into water conservancy diversion passageway 35 earlier of going into of the upper surface of fire lid, final overflow gets into annular collecting tank 50, play the guard action, in order to avoid the overflow to block up second fire outlet 33. The upper surface of the bottom of the baffle 5 has a recessed annular sump 50 at the periphery of the free end 512 or root 511 of each baffle 51, the annular sump 50 is located at the lower end of the diversion channel 35, and the annular sump 50 can collect the overflowing liquid from the diversion channel 35 on one hand and prevent the overflowing liquid from entering the secondary air supply chamber on the other hand.

Example 3

The structure is basically the same as that of the embodiment 1, and the only difference is that: the first fire outlets 32 and the second fire outlets 33 are mesh-type fire outlets, mesh-type regions of the first fire outlets 32 are arranged at intervals along the second fire cover 3, and mesh-type regions of the second fire outlets 33 are distributed over the radial outer side of the second fire cover 3, so that the flow deflector 51 includes a first flow deflector 51 'which simultaneously corresponds to the mesh-type regions of the first fire outlets 32 and the mesh-type regions of the second fire outlets 33, the circumferential width of the first flow deflector 51' is wider, the flow deflector 51 further includes a second flow deflector 51 'which corresponds to the mesh-type regions of the second fire outlets 33 as far as possible, and the circumferential width of the second flow deflector 51 "is narrower than the circumferential width of the first flow deflector 51', as shown in fig. 6 and 7.

Example 4

The structure is basically the same as that of the embodiment 3, and the only difference is that: the deflector 5 is annular and the periphery of the deflector 5 has at least two radially outwardly projecting protrusions 55, each protrusion 55 extending at least partially into the space between adjacent mesh-type regions of the first fire holes 32, as shown with reference to fig. 8 to 10.