Burner and Cooker

Abstract

The present invention provides a burner and a cooking stove. The burner includes a burner main body and a nozzle seat. The burner main body includes a burner head, an outer-ring ejector pipe, an inner-ring ejector pipe and a direct injection pipeline respectively connected to the burner head; the nozzle seat is connected to the burner main body, and the nozzle seat has a first air inlet, a first air outlet, a second air inlet, a second air outlet and a third air outlet. The outer-ring ejector pipe is communicated with the first air outlet, the inner-ring ejector pipe is communicated with the second air outlet, and the direct injection pipeline is communicated with the third air outlet; wherein, the first air inlet, the first air outlet and the third air outlet are communicated to simultaneously ignite or extinguish the outer-ring flame and the direct injection flame by controlling the opening and closing of the first air inlet. The burner controls the outer-ring flame and the direct injection flame simultaneously by controlling the first air inlet, and controls the inner-ring flame by controlling the second air inlet, so as to ensure that the flame covers the entire bottom of the pot during stir-frying, and forms an annular flame at the bottom of the pot during soup cooking, avoiding the problem of burning the soup dry.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen appliances, and particularly to a burner and a cooking stove. Background Art

[0002] The burners of existing cooking stoves usually have an outer-ring flame and an inner-ring flame. The heat load of the outer-ring flame is not large enough, and the heat load of the inner-ring flame is not small enough. It is very difficult to be compatible with both stir-frying and soup-making cooking modes at the same time: when stir-frying, using the outer-ring flame and the inner-ring flame simultaneously makes the overall flame unable to cover the entire bottom of the pot, resulting in uneven flame distribution, uneven bottom temperature of the pot, low temperature at the center of the bottom of the pot, and weak heating ability of the central flame; when making soup, using the inner-ring flame makes the fire concentrated at the bottom of the pot, the bottom temperature is high, and the soup cannot maintain a slightly boiling or heat-preserving state at a medium-low temperature, and the soup will be burned dry after a long time of making soup. Summary of the Invention

[0003] The purpose of the present invention is to provide a burner. The burner controls the outer-ring flame and the direct-injection flame by controlling the first air inlet, and controls the inner-ring flame by controlling the second air inlet, so as to ensure that the flame covers the entire bottom of the pot during stir-frying, and forms an annular flame at the bottom of the pot during soup-making, avoiding the problem of burning the soup dry.

[0004] To achieve the purpose of the present invention, the present invention adopts the following technical solutions:

[0005] According to one aspect of the present invention, a burner is provided. The burner includes a burner body and a nozzle seat. The burner body includes a burner head, an outer-ring ejector pipe, an inner-ring ejector pipe, and a direct-injection pipeline respectively connected to the burner head to guide gas to the top of the burner head to form an outer-ring flame, an inner-ring flame, and a direct-injection flame located in the middle of the inner-ring flame; the nozzle seat is connected to the burner body, and the nozzle seat has a first air inlet, a first air outlet, a second air inlet, a second air outlet, and a third air outlet. The outer-ring ejector pipe is communicated with the first air outlet, the inner-ring ejector pipe is communicated with the second air outlet, and the direct-injection pipeline is communicated with the third air outlet; wherein, the first air inlet, the first air outlet, and the third air outlet are communicated through a first channel to simultaneously ignite or extinguish the outer-ring flame and the direct-injection flame by controlling the opening and closing of the first air inlet, and the second air inlet and the second air outlet are communicated through a second channel.

[0006] According to an embodiment of the present invention, the direct-injection pipeline includes a pipeline main body and a direct-injection nozzle connected in sequence. The pipeline main body is communicated with the third air outlet, and the direct-injection nozzle is connected to the burner head.

[0007] According to an embodiment of the present invention, the direct injection nozzle includes a nozzle tube and a nozzle body connected to the nozzle tube. The nozzle tube is connected to the burner head, and the nozzle body is connected to the pipeline body.

[0008] According to an embodiment of the present invention, a plurality of primary mixing holes are circumferentially arranged around the nozzle tube. When the gas flows through the primary mixing holes, it mixes with the air entering the direct injection nozzle through the primary mixing holes to form a primary mixed gas. The nozzle outlet end of the nozzle body extends to a position flush with the primary mixing holes.

[0009] According to an embodiment of the present invention, the nozzle orifice of the nozzle body has a tapered boss structure. The bottom of the nozzle orifice is flush with the front end of the primary mixing holes along the gas flow direction, and the top of the nozzle orifice is flush with the center of the primary mixing holes.

[0010] According to an embodiment of the present invention, the incident angle of the nozzle orifice is 40° to 50°.

[0011] According to an embodiment of the present invention, the nozzle tube is provided with secondary mixing holes radially penetrating along the direct injection nozzle at the rear end of the primary mixing holes along the gas flow direction. When the primary mixed gas flows through the secondary mixing holes, it mixes with the air entering the direct injection nozzle through the secondary mixing holes to form a secondary mixed gas.

[0012] According to an embodiment of the present invention, the diameter of the secondary mixing holes is 5.5 mm to 6.5 mm.

[0013] According to an embodiment of the present invention, the burner further includes a dual-channel valve body. The dual-channel valve body includes a valve body inlet end and two valve body outlet ends. The valve body inlet end is communicated with the indoor gas supply pipeline, and the two valve body outlet ends are communicated with the first inlet port and the second inlet port.

[0014] According to another aspect of the present invention, a cooking appliance is provided. The cooking appliance includes the aforementioned burner, a cooking appliance housing, and a cooking appliance panel. The cooking appliance housing surrounds and forms a cooking appliance cavity for installing the burner body; the cooking appliance panel is connected to the cooking appliance housing, and the cooking appliance panel is provided with a cooking appliance opening through which the top of the burner head passes.

[0015] One embodiment of the present invention has the following advantages or beneficial effects:

[0016] The burner of the present invention controls the outer ring flame and the direct injection flame by controlling the first air inlet, and controls the inner ring flame by controlling the second air inlet, so as to ensure that the flame covers the entire bottom of the pot during stir-frying, and forms an annular flame at the bottom of the pot during soup cooking, avoiding the problem of burning the soup dry; a secondary air mixing hole is arranged at the rear end of the primary air mixing hole along the gas flow direction, thus solving the difficulty of no secondary air supplement when the top of the direct injection air passage of the burner head is a dense array of small holes distributed vertically upward, and thus avoiding the problems of easy yellow flame of the direct injection flame and easy excessive CO content in the flue gas; the dual-channel valve body controls the gas to pass through the first air inlet and the second air inlet simultaneously, or only through the second air inlet, solving the problem in the prior art that when the three-ring fire burner controls the air intake and the firepower change by a three-channel control valve body, the pipeline for arranging the gas path inside the cooker is complex, a cooker bottom shell with a large opening size is required, and the manufacturing cost is relatively high. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other features and advantages of the present invention will become more apparent by referring to the accompanying drawings and describing its exemplary embodiments in detail.

[0018] Figure 1 is an exploded view of a burner shown according to an exemplary embodiment.

[0019] Figure 2 is a perspective view of a nozzle seat of a burner shown according to an exemplary embodiment.

[0020] Figure 3 is another perspective view of a nozzle seat of a burner shown according to an exemplary embodiment.

[0021] Figure 4 is an internal schematic view of a nozzle seat of a burner shown according to an exemplary embodiment.

[0022] Figure 5 is an internal schematic view of a direct injection nozzle of a burner shown according to an exemplary embodiment.

[0023] Figure 6 is a perspective view of a cooker shown according to an exemplary embodiment.

[0024] Figure 7 is an exploded view of a cooker shown according to an exemplary embodiment.

[0025] Wherein, the reference numerals are explained as follows:

[0026] 1. Burner body; 11. Burner head; 111. Outer ring air passage; 112. Inner ring air passage; 113. Direct injection air passage; 12. Outer ring ejector pipe; 121. Outer ring ejector pipe body; 122. Outer ring nozzle; 13. Inner ring ejector pipe; 131. Inner ring ejector pipe body; 132. Inner ring nozzle; 14. Direct injection pipeline; 141. Pipeline body; 142. Direct injection nozzle; 1421. Nozzle pipe; 14211. Primary mixing air holes; 14212. Secondary mixing air holes; 1422. Nozzle body; 14221. Nozzle orifice; 14222. Nozzle support; 2. Nozzle seat; 21. First air inlet; 22. First air outlet; 23. Second air inlet; 24. Second air outlet; 25. Third air outlet; 26. First channel; 27. Second channel; 3. Dual-channel valve body; 31. Valve body air inlet end; 32. Valve body air outlet end; 33. Valve rod; 4. Cooker housing; 41. Cooker cavity; 5. Cooker panel; 51. Cooker opening; 52. Valve rod hole. Detailed implementation mode

[0027] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. Like reference numerals in the figures denote like or similar structures, and thus their detailed description will be omitted.

[0028] The terms "a", "an", "the", and "said" are used to denote the presence of one or more elements / components / etc.; the terms "comprising" and "having" are used to mean an open inclusion and mean that there may be additional elements / components / etc. in addition to the listed elements / components / etc.

[0029] As Figures 1 to 7 shown, Figure 1 shows an exploded view of a burner provided by the present invention. Figure 2 shows a perspective view of a nozzle seat 2 of a burner provided by the present invention. Figure 3 shows another perspective view of a nozzle seat 2 of a burner provided by the present invention. Figure 4 shows an internal schematic view of a nozzle seat 2 of a burner provided by the present invention. Figure 5 shows an internal schematic view of a direct injection nozzle 142 of a burner provided by the present invention. Figure 6 shows a perspective view of a cooker provided by the present invention. Figure 7 shows an exploded view of a cooker provided by the present invention.

[0030] The burner according to an embodiment of the present invention includes a burner body 1 and a nozzle seat 2. The burner body 1 includes a burner head 11, an outer ring ejector tube 12, an inner ring ejector tube 13, and a direct injection pipeline 14 respectively connected to the burner head 11 to guide gas to the top of the burner head 11 to form an outer ring flame, an inner ring flame, and a direct injection flame located in the middle of the inner ring flame; the nozzle seat 2 is connected to the burner body 1, and the nozzle seat 2 has a first air inlet 21, a first air outlet 22, a second air inlet 23, a second air outlet 24, and a third air outlet 25. The outer ring ejector tube 12 is communicated with the first air outlet 22, the inner ring ejector tube 13 is communicated with the second air outlet 24, and the direct injection pipeline 14 is communicated with the third air outlet 25; wherein, the first air inlet 21, the first air outlet 22, and the third air outlet 25 are communicated through a first channel 26 to simultaneously ignite or extinguish the outer ring flame and the direct injection flame by controlling the opening and closing of the first air inlet 21, and the second air inlet 23 and the second air outlet 24 are communicated through a second channel 27.

[0031] As Figures 1 to 4 shown, the burner head 11 surrounds and forms an outer ring air passage 111, an inner ring air passage 112, and a direct injection air passage 113 which are distributed in sequence from outside to inside. The outer ring ejector tube 12 is communicated with the outer ring air passage 111, the inner ring ejector tube 13 is communicated with the inner ring air passage 112, and the direct injection pipeline 14 is communicated with the direct injection air passage 113. The outer ring ejector tube 12 includes an outer ring ejector tube body 121 and an outer ring nozzle 122. After the outer ring nozzle 122 is installed, it extends into the throat of the outer ring ejector tube body 121. When the gas flows through the outer ring nozzle 122, a negative pressure is generated, and through the negative pressure effect, air enters the outer ring nozzle 122 from the mixing holes of the outer ring nozzle 122, mixes with the gas, and then enters the outer ring ejector tube body 121. The inner ring ejector tube 13 includes an inner ring ejector tube body 131 and an inner ring nozzle 132. After the inner ring nozzle 132 is installed, it extends into the throat of the inner ring ejector tube body 131. When the gas flows through the inner ring nozzle 132, a negative pressure is generated, and through the negative pressure effect, air enters the inner ring nozzle 132 from the mixing holes of the inner ring nozzle 132, mixes with the gas, and then enters the inner ring ejector tube body 131.

[0032] Further, the inner-ring nozzle 132 and the outer-ring nozzle 122 are fixedly connected side by side or integrally formed as a whole. The front side of the nozzle seat 2 and the front side of the outer-ring nozzle 122 are riveted, welded or connected by screws. The rear side of the nozzle seat 2 and the rear side of the inner-ring nozzle 132 are riveted, welded or connected by screws. Further, the outer-ring ejector tube 12 communicates with the first air outlet 22, the inner-ring ejector tube 13 communicates with the second air outlet 24, and the direct injection pipeline 14 communicates with the third air outlet 25. The first air inlet 21 communicates with the first air outlet 22 and the third air outlet 25 respectively through the first channel 26. After the gas enters the nozzle seat 2 through the first air inlet 21, a part of the gas enters the outer-ring ejector tube 12 through the first air outlet 22, and another part of the gas enters the direct injection pipeline 14 through the third air outlet 25, so that the outer-ring flame and the direct injection flame can be synchronously controlled when the first air inlet 21 is closed or opened. At the same time, the second air inlet 23 and the second air outlet 24 are communicated through the second channel 27, so that the inner-ring flame can be controlled when the second air inlet 23 is closed or opened. Therefore, when stir-frying is required, the first air inlet 21 and the second air inlet 23 are opened simultaneously, so that the flame is evenly distributed over the entire bottom of the pot. When stewing soup is required, the first air inlet 21 is closed and the second air inlet 23 is opened, and an annular flame can be formed at the bottom of the pot, reducing the temperature of the bottom of the pot in the prior art. Further, by controlling the heat load of the inner-ring flame between 200 W and 300 W, the soup in the pot can be kept in a slightly boiling or heat preservation state at a medium and low temperature all the time, thus avoiding the problem that the soup will be burned dry during long-term stewing of the soup.

[0033] In a preferred embodiment of the present invention, the direct injection pipeline 14 includes a pipeline main body 141 and a direct injection nozzle 142 connected in sequence. The pipeline main body 141 communicates with the third air outlet 25, and the direct injection nozzle 142 is connected to the burner head 11.

[0034] As Figure 1 and Figure 5 shown, the front end of the pipeline main body 141 along the gas flow direction is connected to the third air outlet 25, and the rear end of the direct injection nozzle 142 along the gas flow direction is connected to the direct injection air passage 113 of the burner head 11. The direct injection nozzle 142 can be mixed with air through the mixing holes on the direct injection nozzle 142, so that the direct injection flame at the top of the direct injection air passage 113 burns sufficiently.

[0035] In a preferred embodiment of the present invention, the direct injection nozzle 142 includes a nozzle tube 1421 and a nozzle main body 1422 connected to the nozzle tube 1421. The nozzle tube 1421 is connected to the burner head 11, and the nozzle main body 1422 is connected to the pipeline main body 141.

[0036] As Figure 1 and Figure 5As shown, the rear end of the nozzle tube 1421 in the gas flow direction is connected to the direct injection air passage 113 of the burner head 11. The front end of the nozzle body 1422 in the gas flow direction communicates with the pipeline body 141. The mixing holes are arranged on the nozzle tube 1421. When the gas flows through the mixing holes of the nozzle tube 1421, negative pressure is generated, and through the action of the negative pressure, air enters the nozzle tube 1421 through the mixing holes, mixes with the gas, and then enters the direct injection air passage 113 of the burner head 11.

[0037] In a preferred embodiment of the present invention, a plurality of first-stage mixing holes 14211 are circumferentially arranged around the nozzle tube 1421. When the gas flows through the first-stage mixing holes 14211, it mixes with the air entering the direct injection nozzle 142 through the first-stage mixing holes 14211 to form a first-stage mixed gas. The nozzle outlet end of the nozzle body 1422 extends to a position flush with the first-stage mixing holes 14211.

[0038] As Figure 1 and Figure 5 As shown, the nozzle tube 1421 is a tubular structure. A plurality of first-stage mixing holes 14211 are circumferentially arranged at equal intervals around the nozzle tube 1421. When the nozzle outlet end of the nozzle body 1422 extends to the first-stage mixing holes 14211, negative pressure is generated at the first-stage mixing holes 14211 by the gas, so that air is brought in through the first-stage mixing holes 14211 and mixed with it for the first time, thereby generating a first-stage mixed gas.

[0039] In a preferred embodiment of the present invention, the nozzle orifice 14221 of the nozzle body 1422 has a tapered boss structure. The bottom of the nozzle orifice 14221 is flush with the front end of the first-stage mixing holes 14211 in the gas flow direction, and the top of the nozzle orifice 14221 is flush with the center of the first-stage mixing holes 14211. The incident angle of the nozzle orifice 14221 is 40° to 50°.

[0040] As Figure 5 As shown, the nozzle body 1422 includes a nozzle support 14222 and a nozzle orifice 14221 connected to the nozzle support 14222. The top surface of the nozzle support 14222, that is, the bottom of the nozzle orifice 14221, is flush with the front end of the first-stage mixing holes 14211 in the gas flow direction. The cross-section of the nozzle orifice 14221 along the axial direction of the nozzle body 1422 is triangular and gradually shrinks in the gas flow direction. The top of the nozzle orifice 14221 extends to the center of the first-stage mixing holes 14211, so that when the gas is ejected from the nozzle orifice 14221, it can immediately mix with the air entering through the first-stage mixing holes 14211, thereby improving the efficiency of the first mixing of the gas and air. The incident angle of the nozzle orifice 14221 is 40° to 50°, which can further reduce the flow loss of the gas and enhance the entrainment ability.

[0041] In a preferred embodiment of the present invention, the nozzle tube 1421 is provided with a secondary mixing air hole 14212 that penetrates radially through the straight injection nozzle 142 at the rear end of the primary mixing air hole 14211 along the gas flow direction. When the primary mixed gas flows through the secondary mixing air hole 14212, it mixes with the air entering the straight injection nozzle 142 through the secondary mixing air hole 14212 to form a secondary mixed gas.

[0042] As Figure 1 and Figure 5 shown, the secondary mixing air hole 14212 penetrates radially through the straight injection nozzle 142, so that the secondary mixing air hole 14212 communicates with the inner cavity of the nozzle tube 1421. When the primary mixed gas flows through the secondary mixing air hole 14212, a negative pressure is generated. The negative pressure causes the secondary air to enter the nozzle tube 1421 through the secondary mixing air hole 14212, so that the primary mixed gas is mixed with the secondary air, solving the difficulty of the lack of secondary air supply when the top of the straight injection air passage 113 of the burner head 11 has numerous vertically upward distributed dense small holes, and thus avoiding the problems of easy yellow flame of the straight injection flame and easy excessive CO content in the flue gas.

[0043] In a preferred embodiment of the present invention, the diameter of the secondary mixing air hole 14212 is 5.5 mm to 6.5 mm.

[0044] Among them, when the primary mixed gas is ejected from the tapered nozzle orifice 14221, it has a certain velocity. When the diameter of the secondary mixing air hole 14212 is 5.5 mm to 6.5 mm, it can ensure that the gas does not leak when passing through the secondary mixing air hole 14212.

[0045] In a preferred embodiment of the present invention, the burner further includes a dual-channel valve body 3. The dual-channel valve body 3 includes a valve body air inlet end 31 and two valve body air outlet ends 32. The valve body air inlet end 31 is connected to the indoor gas supply pipeline, and the two valve body air outlet ends 32 are connected to the first air inlet 21 and the second air inlet 23.

[0046] As Figure 1 shown, the dual-channel valve body 3 is preferably a dual-channel plug valve, which has a valve body air inlet end 31 and two valve body air outlet ends 32. The valve body air inlet end 31 is connected to the indoor gas supply pipeline. One of the valve body air outlet ends 32 is connected to the first air inlet 21, and the other valve body air outlet ends 32 is connected to the second air inlet 23. Thus, when rotating the valve stem 33 of the dual-channel valve body 3, it is possible to control the gas to pass through the first air inlet 21 and the second air inlet 23 simultaneously, or only through the second air inlet 23.

[0047] The burner of the present invention controls the outer ring flame and the direct injection flame simultaneously by controlling the first air inlet 21, and controls the inner ring flame by controlling the second air inlet 23, thereby ensuring that the flame covers the entire bottom of the pot during stir-frying, and forming an annular flame at the bottom of the pot during soup cooking, avoiding the problem of burning the soup dry; a secondary mixing hole 14212 is provided at the rear end of the primary mixing hole 14211 along the gas flow direction, thereby solving the difficulty of no secondary air supplement when the top of the direct injection air passage 113 of the burner head 11 has numerous densely distributed small holes vertically upward, thus avoiding the problems of easy yellow flame of the direct injection flame and easy excessive CO content in the flue gas; the dual-channel valve body 3 controls the gas to pass through the first air inlet 21 and the second air inlet 23 simultaneously, or only through the second air inlet 23, solving the problem in the prior art that when the three-ring fire burner controls the intake air volume and the change of the firepower by a three-channel control valve body, the pipeline for arranging the gas path inside the cooker is complex, a cooker bottom shell with a large opening size is required, and the manufacturing cost is relatively high.

[0048] The cooker of the embodiment of the present invention includes the aforementioned burner, a cooker housing 4, and a cooker panel 5. The cooker housing 4 surrounds and forms a cooker cavity 41 for installing the burner body 1; the cooker panel 5 is connected to the cooker housing 4, and the cooker panel 5 is provided with a cooker opening 51 through which the top of the burner head 11 passes.

[0049] As Figure 6 and Figure 7 shown, the cooker housing 4 surrounds and forms a cooker cavity 41 with an open top, and the cooker panel 5 is provided with a cooker opening 51. When the burner body 1 corresponds to the cooker cavity 41 and is fixedly connected to the cooker housing 4, the top of the burner head 11 passes out from the cooker opening 51. Further, the cooker panel 5 is also provided with a valve rod hole 52 for installing the dual-channel valve body 3. After the burner body 1 is arranged in the cooker cavity 41, the valve rod 33 of the dual-channel valve body 3 extends out from the valve rod hole 52, so that the knob can be covered on the valve rod 33 of the dual-channel valve body 3 from the side of the cooker panel 5 away from the cooker housing 4, so that the cooker can be controlled to be in the stir-frying mode or the soup-cooking mode by rotating the knob, solving the problem in the prior art that when the three-ring fire burner controls the intake air volume and the change of the firepower by a three-channel control valve body, the pipeline for arranging the gas path inside the cooker is complex, a cooker bottom shell with a large opening size is required, and the manufacturing cost is relatively high.

[0050] In the embodiment of the present invention, the term "plurality" refers to two or more, unless otherwise clearly defined. Terms such as "installed", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiment of the present invention can be understood according to specific situations.

[0051] In the description of the embodiments of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the embodiments of the present invention.

[0052] In the description of this specification, the description of terms such as "one embodiment" and "one preferred embodiment" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0053] The above are only the preferred embodiments of the embodiments of the present invention and are not used to limit the embodiments of the present invention. For those skilled in the art, the embodiments of the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the embodiments of the present invention shall be included in the protection scope of the embodiments of the present invention.

Claims

1. A burner, characterized in that, Comprising: A burner main body (1), the burner main body (1) includes a burner head (11), an outer ring ejector pipe (12), an inner ring ejector pipe (13) and a direct injection pipeline (14) respectively connected to the burner head (11), so as to guide gas to the top of the burner head (11) to form an outer ring flame, an inner ring flame and a direct injection flame located in the middle of the inner ring flame; And A nozzle seat (2), the nozzle seat (2) is connected to the burner main body (1), the nozzle seat (2) has a first air inlet (21), a first air outlet (22), a second air inlet (23), a second air outlet (24) and a third air outlet (25), the outer ring ejector pipe (12) is communicated with the first air outlet (22), the inner ring ejector pipe (13) is communicated with the second air outlet (24), and the direct injection pipeline (14) is communicated with the third air outlet (25); Wherein, the first air inlet (21), the first air outlet (22) and the third air outlet (25) are communicated through a first channel (26), so as to simultaneously ignite or extinguish the outer ring flame and the direct injection flame by controlling the opening and closing of the first air inlet (21); The direct injection pipeline (14) includes a pipeline main body (141) and a direct injection nozzle (142) connected in sequence, the pipeline main body (141) is communicated with the third air outlet (25), and the direct injection nozzle (142) is connected to the burner head (11); The direct injection nozzle (142) includes a nozzle pipe (1421) and a nozzle main body (1422) connected to the nozzle pipe (1421), the nozzle pipe (1421) is connected to the burner head (11), and the nozzle main body (1422) is connected to the pipeline main body (141); A plurality of first-stage mixing holes (14211) are annularly arranged along the circumferential direction of the nozzle pipe (1421), when the gas flows through the first-stage mixing holes (14211), it mixes with the air entering the direct injection nozzle (142) through the first-stage mixing holes (14211) to form a first-stage mixed gas, and the nozzle outlet end of the nozzle main body (1422) extends to a position flush with the first-stage mixing holes (14211); The nozzle pipe (1421) is provided with second-stage mixing holes (14212) radially penetrating along the direct injection nozzle (142) at the rear end of the first-stage mixing holes (14211) along the gas flow direction, and when the first-stage mixed gas flows through the second-stage mixing holes (14212), it mixes with the air entering the direct injection nozzle (142) through the second-stage mixing holes (14212) to form a second-stage mixed gas.

2. The burner according to claim 1, characterized in that, The nozzle orifice (14221) of the nozzle main body (1422) has a tapered boss structure, the bottom of the nozzle orifice (14221) is flush with the front end of the first-stage mixing holes (14211) along the gas flow direction, and the top of the nozzle orifice (14221) is flush with the center of the first-stage mixing holes (14211).

3. The burner according to claim 2, characterized in that, The incident angle of the nozzle orifice (14221) is 40° to 50°.

4. The burner according to claim 1, characterized in that, The diameter of the second-stage mixing holes (14212) is 5.5 mm to 6.5 mm.

5. The burner according to claim 1, characterized in that, It further includes a dual-channel valve body (3), the dual-channel valve body (3) includes a valve body air inlet end (31) and two valve body air outlet ends (32), the valve body air inlet end (31) is communicated with an indoor gas supply pipeline, and the two valve body air outlet ends (32) are communicated with the first air inlet (21) and the second air inlet (23).

6. A cooking appliance, characterized in that, Comprising: The burner according to any one of claims 1 to 5; A cooker housing (4), the cooker housing (4) encloses and forms a cooker cavity (41) for installing the burner body (1); and A cooker panel (5), the cooker panel (5) is connected to the cooker housing (4), and the cooker panel (5) is provided with a cooker opening (51) for the top of the burner head (11) to pass through.

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