Cooker burner and cooker

Abstract

The present invention relates to a stove burner and a stove, wherein the stove burner comprises a base, having an inner ring cavity, an outer ring cavity and a middle ring cavity in an annular shape; a first infrared combustion plate in an annular shape, arranged at a position adjacent to the top of the outer ring cavity and covering the top opening of the outer ring cavity, and having a first fire hole distributed thereon; a partition plate arranged in the middle ring cavity, dividing the inner cavity of the middle ring cavity into at least a gas channel and an air supply channel which are independent of each other and open at the top, the gas channel having a gas inlet, and the air supply channel having a secondary air inlet for secondary air to enter; a middle ring fire cover, covering the top opening of the gas channel, having a fire outlet hole connecting the gas channel with the outside world; and a cover plate, arranged at a position adjacent to the top opening of the air supply channel, and forming an air supply chamber together with the air supply channel, wherein the air supply chamber has a secondary air outlet for secondary air to flow out. By supplementing the secondary air, the combustion is made more complete and the combustion efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of stoves, and in particular relates to a stove burner and a stove. Background Art

[0002] The burner is one of the important components of a gas stove, which directly affects the stove's flue gas, thermal efficiency and other performance.

[0003] Existing burner structures, such as the Chinese utility model "A Burner for Cookers" previously applied for by the applicant, whose patent number is ZL201821028377.8 (authorization announcement number is CN208886771U), discloses a burner for cookers, including an outer ring cavity, the outer ring cavity including an inner ring wall and an outer ring wall that are annular and concentrically spaced, and a bottom wall connecting the inner ring wall and the outer ring wall, the inner ring wall and the outer ring wall are covered with an outer ring fire cover, characterized in that: the outer ring cavity has a relatively isolated secondary air replenishment chamber, the top wall of the outer ring fire cover has main fire holes and an air outlet of the secondary air replenishment chamber distributed radially and at intervals, and the inner ring wall and / or outer ring wall and / or bottom wall of the outer ring cavity are provided with an air inlet connected to the outside air and the air outlet at a position corresponding to the secondary air replenishment chamber.

[0004] The maximum flame temperature of the above-mentioned atmospheric stove is generally around 850°C. The pot body is heated by convection and heat radiation of high-temperature flue gas, of which convection heating accounts for about 80% and radiation heating accounts for 20%. The heat load is large. Convection heating of the pot body is limited by the heat absorption capacity of the pot body. The temperature of the flue gas exhausted from the bottom of the pot is relatively high. Nearly a quarter of the heat is carried away by the exhausted flue gas and dissipated into the surrounding environment. The maximum thermal efficiency can only reach about 78%.

[0005] In order to solve the above technical problems, the Chinese utility model "A New High-efficiency Energy-saving and Environmentally Friendly Burner" previously applied by the applicant, whose patent number is ZL201320429097.9 (authorization announcement number is CN 203404810U), discloses a new high-efficiency energy-saving and environmentally friendly burner, including a body, the body including an outer ring flame generator formed with an outer ring mixing chamber, an infrared burner is arranged inside the body, the infrared burner includes an inner mixing chamber connected to an inner ejector tube and a combustion plate arranged above the inner mixing chamber, the combustion plate is located on the body space surrounded by the outer ring fire cover, and a fire outlet is arranged on the combustion plate. In this patent, infrared and atmospheric combustion are combined, and the combustion efficiency and exchange efficiency are higher, so that the flame wavelength of the outer ring flame generator is less than 0.76μm, the flame wavelength of the middle ring flame generator is between 0.75 and 40μm, and the flame wavelength of the inner ring flame generator is between 25 and 1000μm, so that this semi-atmospheric and semi-infrared burner can adopt "full-band" technology. However, in the modified design, flame escape is easy to occur at the outer ring fire cover, and if the combustion plate area is arranged in the inner ring, the diameter will be very large, which will eventually increase the size of the entire burner.

[0006] Another example is the Chinese utility model patent "An infrared burner with atmospheric combustion", whose patent number is ZL201821677211.9 (authorization announcement number is CN209180935U), which discloses an infrared burner including an inner ring air mixing chamber, an outer ring air mixing chamber and a middle ring air mixing chamber located between the outer ring air mixing chamber and the inner ring air mixing chamber. A circular infrared combustion plate is provided on the outer ring air mixing chamber. There is no secondary air supplement in the middle cavity, and the combustion is incomplete. At the same time, the ignition needle is located in the middle ring cavity, and the overflow can easily flow onto the ignition needle, which can easily cause the ignition needle to be blocked and flameout. Summary of the invention

[0007] The first technical problem to be solved by the present invention is to provide a semi-atmospheric and semi-infrared stove burner which can make combustion more complete by supplementing secondary air in view of the current status of the above-mentioned prior art.

[0008] The second technical problem to be solved by the present invention is to provide a stove having the above stove burner which reduces heat loss and prevents heat from being transferred to the interior of the stove.

[0009] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: a stove burner, comprising

[0010] The base has an annular inner ring cavity, an outer ring cavity located outside the inner ring cavity and open at the top, and a middle ring cavity located between the inner ring cavity and the outer ring cavity;

[0011] The first infrared combustion plate is annular and is arranged near the top of the outer ring cavity to cover the top opening of the outer ring cavity, and has first fire holes distributed thereon; it is characterized in that it also includes

[0012] a partition plate, arranged in the middle ring cavity, to separate the inner cavity of the middle ring cavity into at least a gas channel and an air supply channel which are independent of each other and open at the top, wherein the gas channel has a gas inlet, and the air supply channel has a secondary air inlet for secondary air to enter;

[0013] A middle ring fire cover, covering the top opening of the gas channel, and having a fire outlet hole connecting the gas channel with the outside; and

[0014] The cover plate is arranged at a position adjacent to the top opening of the air supplement channel and forms an air supplement chamber together with the air supplement channel, wherein the air supplement chamber has a secondary air outlet for secondary air to flow out.

[0015] The gas channel and the air supply channel can be in a ring shape and arranged in sequence along the radial direction, or they can be arranged in sequence along the circumferential direction. Preferably, there are at least two partitions, which extend vertically and are arranged at intervals along the circumferential direction, and then the gas channel and the air supply channel are arranged in sequence along the circumferential direction.

[0016] In order to gather the fire from the outside to the inside, the middle ring fire cover and the cover plate are basically fan-shaped with a narrow inner end and a wide outer end.

[0017] One of the ways to form the secondary air outlet is that a gap is left between the cover plate and the air supply channel, and the gap is the secondary air outlet. In this way, the secondary air can be supplied to the fire outlet in time.

[0018] The second way to form the secondary air outlet is: the cover plate is located above the middle ring fire cover, and a gap is left between the cover plate and the adjacent middle ring fire cover, and the gap is the secondary air outlet. In addition, the secondary air outlet can also be formed by opening a secondary air outlet on the cover plate.

[0019] In order to conveniently contain the overflow, the upper surface of the cover plate has a concave cavity for containing the overflow. Since the overflow contained in the concave cavity will be carbonized by the high temperature under the heating effect of the first infrared combustion plate, the overflow will be reduced to flow into the fire outlet hole and block the fire outlet hole.

[0020] In order to increase the supplement of secondary air and improve the combustion efficiency, the air supplement channel is connected from top to bottom, and there are at least two of them arranged at intervals along the circumferential direction and in fluid communication with each other. The secondary air inlet is the lower opening of the air supplement channel, and the gas channel is arranged between two adjacent air supplement channels. In this way, the secondary air can be supplemented to the gas channel to make the combustion more complete and improve the combustion efficiency.

[0021] Preferably, each of the air supply channels is provided with a cover plate, and the cover plates are connected via a connecting ring, and the connecting ring is placed on the base and corresponds to the inner ring cavity. In this way, the overflow can be better blocked and the overflow can be reduced from entering the fire outlet.

[0022] In order to facilitate the flow of overflow liquid to the cover plate, the inner ring cavity is covered with a guide plate for guiding the overflow liquid toward the cover plate, and the guide plate is at least partially located above the cover plate.

[0023] There are many designs of the guide plate, wherein one of the designs is: the guide plate is a porous mesh that protrudes upward as a whole.

[0024] In order to increase the heat load of the inner ring cavity, a second infrared combustion plate covering the top opening of the inner ring cavity is provided near the top of the inner ring cavity, and second fire holes are distributed on the second infrared combustion plate. In this way, combustion occurs on the surface of the second infrared combustion plate, there is no open flame and the fire line will not escape, thereby increasing the heat load.

[0025] The second design form of the guide plate: the guide plate is a convex lens, and the upper surface of the convex lens is arched upward. In this way, the infrared rays can be focused while the guide is realized to improve the thermal efficiency.

[0026] Preferably, the upper surface of the convex lens is a first spherical surface, the lower surface of the convex lens is a second spherical surface convex downward, and the thickness of the thickest part of the convex lens is d. n is the refractive index of the convex lens, r1 is the radius of the second spherical surface, r2 is the radius of the first spherical surface, and H is the height between the first spherical surface and the bottom surface of the heated component.

[0027] In order to achieve the purpose of ignition, the setting position adopts the first form: an ignition needle is arranged on the base, the inner ring cavity has a vertically penetrating channel, the outer peripheral wall of the channel and the inner peripheral wall of the inner ring cavity enclose an annular channel for the inner ring gas to enter, the second infrared combustion plate is located in the annular channel, the ignition needle is located in the channel, and partially extends out of the channel and is located between the second infrared combustion plate and the guide plate. The ignition needle is hidden in the channel and is located below the guide plate to prevent the overflow from directly contacting the ignition needle and causing the flameout.

[0028] In order to achieve the purpose of ignition and prevent flameout at the same time, the second form is adopted for its setting position: an ignition needle is arranged in the middle ring cavity, the ignition needle extends upward and is partially located between the second infrared combustion plate and the guide plate. The ignition needle is hidden in the channel and located below the guide plate. The overflow is guided to the cover plate and carbonized on the cover plate under the action of the guide plate, preventing the overflow from directly contacting the ignition needle and causing flameout, which plays a good role in protecting the fire.

[0029] There are many forms of forming the gas inlet, but preferably, the base has a middle ring channel that is fluidically connected to the gas channel, the inlet of the middle ring channel is opened on the outer peripheral wall of the base, and the inlet is the gas inlet.

[0030] The technical solution adopted by the present invention to solve the above-mentioned second technical problem is: a stove with the above-mentioned stove burner, characterized in that it also includes a stove panel and an energy-gathering cover with a cavity inside, the stove panel is provided with a mounting hole, the burner is embedded in the mounting hole, the energy-gathering cover is located at the periphery of the burner, and the part of the energy-gathering cover located in the mounting hole is lower than the stove panel.

[0031] In order to further reduce energy leakage, a partition plate extending in the circumferential direction is provided in the cavity, and the cavity is divided into at least two independent sub-chambers arranged up and down by the partition plate, and the upper surface of the partition plate is a reflective surface that reflects infrared rays. The energy collecting cover is usually made of metal. Due to the heat conduction and heat exchange of metal, the lower plate below the partition plate still has a high temperature, and infrared rays will radiate to the lower layer. The existence of the reflective surface on the partition plate prevents infrared rays from radiating to the lower layer, which can achieve the purpose of layer-by-layer energy collection and prevent energy leakage.

[0032] In order to accommodate the subsequent heating of a flat pan and a pointed bottom pan, the inner peripheral edge of one of the upper and lower outer surfaces of the energy-gathering cover is lower than the outer peripheral edge, and the other outer surface at least partially has a substantially horizontal resting surface. In this way, the purpose of heating the flat pan and the pointed bottom pan can be achieved while heat is concentrated, infrared rays are prevented from escaping, and radiant heat loss is reduced.

[0033] Compared with the prior art, the stove burner of the present invention is a semi-atmospheric and semi-infrared burner, and an air supply channel and a gas channel are arranged in the middle ring cavity of the burner. Air is supplied to the gas channel through the air supply channel, so that the combustion is more complete and the combustion efficiency is improved. The arrangement of the top cover plate on the air supply channel can block the overflow to a certain extent, and the overflow on the cover plate can also be carbonized under the heating action of the first combustion plate, reducing the overflow from entering the fire outlet hole of the middle ring fire cover and clogging the fire outlet hole; the air supply channel and the gas channel in the middle ring cavity are arranged in sequence along the circumferential direction, and the gas channel is located between the two air supply channels. In this way, secondary air can be supplemented from both sides of the gas channel, so that the combustion is more complete and the combustion efficiency is improved, while taking into account the function of flame transmission. When the inner ring is a small fire, the medium fire, and the outer ring is a large fire, the inner ring fire can be transmitted to the outer ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic structural diagram of a burner according to Embodiment 1 of the present invention;

[0035] Figure 2 for Figure 1 A cross-sectional view of

[0036] Figure 3 for Figure 1 A cross-sectional view from another angle;

[0037] Figure 4 is a cross-sectional view of the base of the first embodiment;

[0038] Figure 5 is a cross-sectional view of the base of the first embodiment from another angle;

[0039] Figure 6 for Figure 1 Schematic diagram of the structure of the middle cover;

[0040] Figure 7 for Figure 1 A schematic diagram of the structure of the middle pot support when it is placed in the energy-gathering cover;

[0041] Figure 8 for Figure 7 Schematic diagram of the structure of the middle energy-gathering hood;

[0042] Fig. 9 for Figure 7 Schematic diagram of the three-dimensional decomposition structure;

[0043] Fig.10 This is the principle diagram of a convex lens;

[0044] Fig.11 is a structural schematic diagram of a cooker according to Embodiment 1;

[0045] Fig.12 for Fig.11 A cross-sectional view of

[0046] Fig.13 for Fig.12 The enlarged structural diagram of the middle C part;

[0047] Fig.14 This is a schematic structural diagram of a burner according to Embodiment 2 of the present invention;

[0048] Fig.15 for Fig.14 A cross-sectional view of

[0049] Fig.16 is a cross-sectional view of a burner according to Embodiment 3 of the present invention;

[0050] Fig.17 Schematic diagram of the structure of the base of the third embodiment of the present invention. DETAILED DESCRIPTION

[0051] The present invention is further described in detail below with reference to the accompanying drawings.

[0052] Embodiment 1:

[0053] like Figures 1 to 13 The first preferred embodiment of the present invention is shown in FIG.

[0054] like Figures 11 to 13 As shown, a mounting hole 101 is provided on the stove panel 10, the burner is embedded in the mounting hole 101, the energy collecting cover 6 is partially provided on the stove panel 10 and surrounds the burner, and the portion of the energy collecting cover 6 located in the mounting hole 101 is lower than the stove panel 10; Fig.13 As shown, the energy collecting cover 6 is hollow inside to form a cavity 61, and a partition plate 62 is arranged in the cavity 61. The partition plate 62 extends in the circumferential direction and is arranged transversely. Then, the cavity 61 is divided into at least two independent sub-chambers 611 arranged up and down by the partition plate 62; in addition, the upper surface of the partition plate 62 is a reflective surface 621 that reflects infrared rays. In this embodiment, Figures 7 to 9 As shown, one of the upper and lower surfaces of the energy-gathering cover 6 is an inclined surface whose inner peripheral edge is lower than the outer peripheral edge, and the inclined surface is the first surface 6a, wherein the other outer surface is at least partially a substantially horizontal shelf surface, and the shelf surface is the second surface 6b; the pot support 9 is arranged on one of the first surface 6a or the second surface 6b of the energy-gathering cover 6, and the pot support 9 is located above the energy-gathering cover 6, and the pot support 9 is arranged with at least two legs 91 spaced apart along the circumferential direction, and there are four legs 91 in this embodiment, see Figures 7 to 9 shown.

[0055] like Figures 1 to 3 As shown, the burner includes a base 1, a first infrared combustion plate 2, a partition 13a, a middle ring fire cover 3, a cover plate 4, a second infrared combustion plate 5, a guide plate and an ignition needle 8.

[0056] like Figures 2 to 5 As shown, the base 1 has an annular inner ring cavity 11, an outer ring cavity 12 located outside the inner ring cavity 11, and a middle ring cavity 13 located between the inner ring cavity 11 and the outer ring cavity 12. The tops of the inner ring cavity 11, the outer ring cavity 12, and the middle ring cavity 13 are all open. Figure 4 As shown. The base 1 is provided with three mixed gas channels, namely, an inner ring channel 15, a middle ring channel 16 and an outer ring channel 17 provided on the bottom of the base 1. The inner ring channel 15 is used to connect with the inner ring ejector tube 181, and the inner ring channel 15 is connected with the inner ring cavity 11; the middle ring channel 16 is used to connect with the middle ring ejector tube 182, and the middle ring channel 16 is connected with the middle ring cavity 13; the outer ring channel 17 is used to connect with the outer ring ejector tube 183, and the outer ring channel 17 is connected with the outer ring cavity 12, so that the base 1 can receive the mixed gas from the ejector tube.

[0057] like Figure 2 and Figure 3 As shown, the first infrared combustion plate 2 is annular and has first fire holes 21 distributed thereon. The thickness of the first infrared combustion plate 2 is 10-12mm, and the intensity of the first fire holes 21 is 0.15-0.5w / mm2. The first infrared combustion plate 2 is arranged in the outer ring cavity 12 and covers the top opening of the outer ring cavity 12. When the first side 6a of the energy focusing cover faces upward, it is suitable for a pointed bottom pot to be placed thereon. In this way, the radiation angle coefficient of the first infrared combustion plate is increased, the effective heating area at the bottom of the pot is large, and the bottom surface of the pointed bottom pot is heated evenly. When the second side 6b of the energy focusing cover faces upward, it is suitable for a frying pan to be placed thereon. In this way, the radiation angle coefficient of the first infrared combustion plate is reduced, and the heating area of ​​the bottom of the frying pan is reduced, thereby avoiding the loss of heat energy caused by the escape of infrared rays when heating the frying pan.

[0058] like Figure 2 and Figure 3 As shown, there are at least two of the above-mentioned partitions 13a and they extend vertically. The partitions 13a are arranged in the middle ring cavity 13 at intervals along the circumferential direction to divide the inner cavity of the middle ring cavity 13 into at least a gas channel 131 and an air supply channel 132 which are independent of each other and open at the top. The gas channel 131 and the air supply channel 132 are arranged in sequence along the circumferential direction. Among them, there are at least two air supply channels 132 that are connected from top to bottom, and each air supply channel 132 is arranged at intervals along the circumferential direction and is fluidly connected. In the present embodiment, there are three air supply channels 132, and the lower opening of each air supply channel 132 is its own secondary air inlet 1321, and the secondary air inlet 1321 is for secondary air to enter. A gas channel 131 is arranged between two adjacent air supply channels 132, and an intermediate flow channel 161 is arranged in the outer ring cavity 12. The intermediate flow channel 161 is connected to the middle ring channel 16, and the inlet of the middle ring channel 16 is the gas inlet 1311 of the gas channel 131. There are three gas channels 131, and an opening 1312 connected to the intermediate flow channel 161 is opened on the outer wall of the gas channel 131. The top opening of each gas channel 131 is covered with a central ring fire cover 3, which is basically fan-shaped with a narrow inner end and a wide outer end. The central ring fire cover 3 is a porous mesh structure, and a fire outlet hole 31 connected to the outside is opened on the central ring fire cover 3.

[0059] like Figure 2 and Figure 3 As shown, the top opening of each air supply channel 132 is covered with a cover plate 4, which is basically fan-shaped with a narrow inner end and a wide outer end. Each cover plate 4 is connected by a connecting ring 42, which is placed on the base 1 and corresponds to the inner ring cavity 11. For details, see Figure 2 and Figure 3As shown; in addition, the upper surface of the cover plate 4 has a concave cavity 41 which is recessed downward for accommodating overflow liquid; the cover plate 4 and the respective air supply channels 132 together form an air supply chamber A, and the air supply chamber A has a secondary air outlet for secondary air to flow out. In the present embodiment, the cover plate 4 is located above the middle ring fire cover 3, and a gap f is left between the cover plate 4 and the adjacent middle ring fire cover 3, and the gap f is the above-mentioned secondary air outlet; or, a gap f is left between the cover plate 4 and the air supply channel 132, and the gap f is the above-mentioned secondary air outlet.

[0060] like Figures 1 to 3 As shown, a second infrared combustion plate 5 is provided in the inner ring cavity 11 near its top, and the second infrared combustion plate 5 is used to cover the top opening of the inner ring cavity 11, and second fire holes 51 are distributed on the second infrared combustion plate 5, the thickness of the second infrared combustion plate 5 is 10-12mm, the strength of the second fire hole 21 is 0.15-0.5w / mm2, the opening rate and the fire hole strength of the second infrared combustion plate 5 are both low, and the minimum firepower can reach 1 / 2-1 / 5 of the conventional atmospheric burner. The connecting ring 42 above the inner ring cavity 11 is covered with a guide plate used to guide the overflow to the concave cavity 41 of the cover plate 4, and the guide plate is at least partially located above the cover plate 4. In this embodiment, the guide plate is a convex lens 7b, the upper surface of the convex lens 7b is arched upward, and the upper surface of the convex lens 7b is a first spherical surface 71, and the lower surface of the convex lens 7b is a second spherical surface 72 that bulges downward. The thickness of the thickest part of the convex lens 7b is d, n is the refractive index of the convex lens 7b, r1 is the radius of the second spherical surface 72, r2 is the radius of the first spherical surface 71, and H is the height between the first spherical surface 71 and the bottom surface of the pot B. For details, see Fig.10 In this way, the infrared rays are focused to the center of the pot bottom through the convex lens, which improves the thermal efficiency of the low fire.

[0061] like Figure 2 and Figure 3 As shown, the inner ring cavity 11 has a vertically penetrating channel 111 inside, and the outer peripheral wall of the channel 111 and the inner peripheral wall of the inner ring cavity 11 enclose an annular channel 112 for the inner ring gas to enter. The second infrared combustion plate 5 is annular and located in the annular channel 112. The above-mentioned ignition needle 8 is located in the channel 111 and partially extends out of the channel 111 and is located between the second infrared combustion plate 5 and the convex lens 7b. The first infrared combustion plate and the second infrared combustion plate in the above-mentioned embodiment are both formed by a plurality of annular porous ceramic plates, and other structures in the prior art can also be used.

[0062] The "fluid connection" referred to in the present invention refers to the spatial position relationship between two parts or parts (hereinafter collectively referred to as the first part and the second part respectively), that is, the fluid (gas, liquid or a mixture of the two) can flow from the first part along the flow path or / and be transported to the second part. The first part and the second part can be directly connected, or the first part and the second part can be indirectly connected through at least one third party. The third party can be a fluid channel such as a pipe, channel, duct, guide member, hole, groove, etc., or it can be a chamber allowing fluid to flow through, or a combination of the above.

[0063] Embodiment 2:

[0064] like Figure 14 to Figure 15 The second preferred embodiment of the present invention is shown in FIG. The only difference between this embodiment and the above-mentioned embodiment 1 is that: the guide plate is a porous mesh 7a that protrudes upward as a whole, the aperture of the holes on the porous mesh 7a is 1.0-1.5mm, and the fire hole strength is 4.5-6.5w / mm2; the ignition needle 8 is arranged in the middle ring cavity 13, and the ignition needle 8 extends upward and bends toward the second infrared combustion plate 5 and is partially located between the second infrared combustion plate 5 and the porous mesh 7a. The porous mesh 7a protrudes upward, which can promote the liquid overflowing from the pot to the inner ring cavity to flow outward. At the same time, the second infrared radiation plate below heats the overflow, and the high temperature causes the liquid to evaporate and carbonize, preventing the overflow from flowing into the ignition needle 8, causing the ignition needle to be blocked and extinguished, and at the same time preventing the flame in the central fire protection area from being extinguished.

[0065] Embodiment three:

[0066] like Figure 16 to Figure 17 The third preferred embodiment of the present invention is shown in FIG. 1 . The only difference between this embodiment and the first embodiment is that the partition plate 13a is vertically arranged in the middle ring cavity 13, and the partition plate 13a extends circumferentially, and the inner cavity of the middle ring cavity 13 is divided from the outside to the inside into a gas channel 131 and a supplementary gas channel 132 which are independent and open at the top; that is, the gas channel 131 and the supplementary gas channel 132 are both annular, see Fig.16 and Fig.17 As shown; the guide plate is a porous mesh 7a that protrudes upward as a whole, the aperture of the holes on the porous mesh 7a is 1.0-1.5mm, and the fire hole strength is 4.5-6.5w / mm2.

Claims

1. A stove burner, comprising The base (1) comprises an annular inner ring cavity (11), an outer ring cavity (12) located outside the inner ring cavity (11) and open at the top, and a middle ring cavity (13) located between the inner ring cavity (11) and the outer ring cavity (12); The first infrared combustion plate (2) is annular and is arranged adjacent to the top of the outer ring cavity (12) to cover the top opening of the outer ring cavity (12), and has first fire holes (21) distributed thereon; It is characterized in that Also includes a partition (13a) disposed in the middle ring cavity (13) to separate the inner cavity of the middle ring cavity (13) into at least a gas channel (131) and an air supplement channel (132) which are independent of each other and open at the top, wherein the gas channel (131) has a gas inlet (1311), and the air supplement channel (132) has a secondary air inlet (1321) for secondary air to enter; A middle ring fire cover (3) covers the top opening of the gas channel (131) and is provided with a fire outlet hole (31) connecting the gas channel (131) with the outside; and A cover plate (4) is arranged at a position adjacent to the top opening of the air supply channel (132), and together with the air supply channel (132) forms an air supply chamber (A), wherein the air supply chamber (A) has a secondary air outlet for secondary air to flow out; There are at least two partitions (13a), which extend vertically and are arranged at intervals along the circumferential direction, and the gas channel (131) and the air supplement channel (132) are arranged in sequence along the circumferential direction; The inner ring cavity (11) is covered with a guide plate for guiding overflow toward the cover plate (4), and the guide plate is at least partially located above the cover plate (4); The guide plate is a convex lens (7b), and the upper surface of the convex lens (7b) is arched upwards; The upper surface of the convex lens (7b) is a first spherical surface (71), the lower surface of the convex lens (7b) is a second spherical surface (72) convex downward, the thickness of the convex lens (7b) at its thickest point is d, n is the refractive index of the convex lens (7b), r1 is the radius of the second spherical surface (72), r2 is the radius of the first spherical surface (71), and H is the height between the first spherical surface (71) and the bottom surface of the heated component; The base (1) has a middle ring channel (16) in fluid communication with the gas channel (131), and an inlet of the middle ring channel (16) is opened on the outer peripheral wall of the base (1), and the inlet is the gas inlet (1311).

2. The stove burner according to claim 1, characterized in that: The middle ring fire cover (3) and the cover plate (4) are both basically in the shape of a fan with a narrow inner end and a wide outer end.

3. The stove burner according to claim 1, characterized in that: A gap (f) is left between the cover plate (4) and the air supply channel (132), and the gap (f) is the secondary air outlet.

4. The stove burner according to claim 1, characterized in that: The cover plate (4) is located above the middle ring fire cover (3), and a gap (f) is left between the cover plate (4) and the adjacent middle ring fire cover (3), and the gap (f) is the secondary air outlet.

5. The stove burner according to claim 4, characterized in that: The upper surface of the cover plate (4) has a cavity (41) which is recessed downwards and used to accommodate overflow liquid.

6. The stove burner according to claim 4, characterized in that: The air supply channel (132) is connected from top to bottom, and there are at least two of them which are arranged at intervals along the circumferential direction and are fluidly connected. The secondary air inlet (1321) is the lower opening of the air supply channel (132), and the gas channel (131) is arranged between two adjacent air supply channels (132).

7. The stove burner according to claim 6, characterized in that: A cover plate (4) is provided on each of the air supply channels (132), and the cover plates (4) are connected to each other via a connecting ring (42). The connecting ring (42) is placed on the base (1) and corresponds to the inner ring cavity (11).

8. The stove burner according to any one of claims 1 to 7, characterized in that: The guide plate is a porous mesh (7a) that protrudes upward as a whole.

9. The stove burner according to any one of claims 1 to 7, characterized in that: A second infrared combustion plate (5) is provided near the top of the inner ring cavity (11) to cover the top opening thereof, and second fire holes (51) are distributed on the second infrared combustion plate (5).

10. The stove burner according to claim 9, characterized in that: An ignition needle (8) is provided on the base (1), and the inner ring cavity (11) has a vertically penetrating channel (111), the outer peripheral wall of the channel (111) and the inner peripheral wall of the inner ring cavity (11) enclose an annular channel (112) for the inner ring gas to enter, the second infrared combustion plate (5) is located in the annular channel (112), and the ignition needle (8) is located in the channel (111) and partially extends out of the channel (111) and is located between the second infrared combustion plate (5) and the guide plate.

11. The stove burner according to claim 9, characterized in that: An ignition needle (8) is arranged in the middle ring cavity (13), and the ignition needle (8) extends upward and is partially located between the second infrared combustion plate (5) and the guide plate.

12. A cooker having a cooker burner according to any one of claims 1 to 11, characterized in that: The invention also comprises a stove panel (10) and an energy collecting cover (6) having a cavity (61) therein; the stove panel (10) is provided with a mounting hole (101); the burner is embedded in the mounting hole (101); the energy collecting cover (6) is located at the periphery of the burner; and the portion of the energy collecting cover (6) located in the mounting hole (101) is lower than the stove panel (10).

13. The cooker according to claim 12, characterized in that: A partition plate (62) extending in the circumferential direction is arranged in the cavity (61); the cavity (61) is divided by the partition plate (62) into at least two mutually independent sub-chambers (611) arranged up and down; and the upper surface of the partition plate (62) is a reflection surface (621) that reflects infrared rays.

14. The cooker according to claim 13, characterized in that: The inner peripheral edge of one of the upper and lower outer surfaces of the energy gathering cover (6) is lower than the outer peripheral edge, and the other outer surface is at least partially a substantially horizontal shelf surface.

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