CN219036623U - Burner and kitchen range - Google Patents

Abstract

The utility model provides a burner and a stove. The burner includes a burner body and a nozzle holder. The burner main body comprises a burner, an outer ring injection pipe, an inner ring injection pipe and a direct injection pipeline, wherein the outer ring injection pipe, the inner ring injection pipe and the direct injection pipeline are respectively connected with the burner; the nozzle seat is connected to the burner main body and is provided with a first air inlet, a first air outlet, a second air inlet, a second air outlet and a third air outlet, the outer ring injection pipe is communicated with the first air outlet, the inner ring injection pipe is communicated with the second air outlet, and the direct injection pipeline is communicated with the third air outlet; the first air inlet, the first air outlet and the third air outlet are communicated, so that the outer ring flame and the direct-injection flame are ignited or extinguished simultaneously by controlling the opening and closing of the first air inlet. The burner controls the outer ring flame and the direct-injection flame simultaneously through controlling the first air inlet and controls the inner ring flame through controlling the second air inlet, so that the flame covers the whole bottom of the pot during quick-frying, and an annular flame is formed at the bottom of the pot during soup cooking, and the problem of burning the soup is avoided.

Description

Burner and kitchen range

Technical Field

The utility model relates to the technical field of kitchen appliances, in particular to a combustor and a kitchen range.

Background

The existing burner of the kitchen range is usually an outer ring flame and an inner ring flame, the heat load of the outer ring flame is not big enough, the heat load of the inner ring flame is not small enough, and two cooking modes of quick-frying and soup cooking are difficult to be compatible at the same time: when the frying is performed, the outer ring flame and the inner ring flame are simultaneously used, so that the whole flame cannot cover the whole bottom of the pan, the flame is unevenly distributed, the temperature of the bottom of the pan is uneven, the temperature of the bottom of the center pan is low, and the heating capacity of the center fire is not strong; when the soup is cooked, the inner ring flame is used, so that the firepower is concentrated at the bottom of the pot, the temperature of the bottom of the pot is high, the soup cannot be kept at a medium-low temperature state for micro boiling or heat preservation, and the soup can be dried after being cooked for a long time.

Disclosure of Invention

The utility model aims to provide a burner, which controls outer ring flame and direct-injection flame simultaneously through controlling a first air inlet and controls inner ring flame through controlling a second air inlet, so that the flame covers the whole pan bottom during quick frying, and annular flame is formed at the pan bottom during soup cooking, and the problem of burning soup dry is avoided.

In order to achieve the purpose of the utility model, the utility model adopts the following technical scheme:

according to one aspect of the present utility model, there is provided a burner comprising a burner body and a nozzle holder. The burner main body comprises a burner, an outer ring injection pipe, an inner ring injection pipe and a direct injection pipeline which are respectively connected with the burner, so that fuel gas is guided to the top of the burner to form outer ring flame, inner ring flame and direct injection flame positioned in the middle of the inner ring flame; the nozzle seat is connected to the burner main body and is provided with a first air inlet, a first air outlet, a second air inlet, a second air outlet and a third air outlet, the outer ring injection pipe is communicated with the first air outlet, the inner ring injection pipe is communicated with the second air outlet, and the direct injection pipeline is communicated with the third air outlet; the first air inlet, the first air outlet and the third air outlet are communicated through a first channel, so that the outer ring flame and the direct-injection flame are ignited or extinguished simultaneously 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.

According to one embodiment of the present utility model, the straight nozzle path includes a pipeline main body and a straight nozzle connected in sequence, the pipeline main body is communicated with the third air outlet, and the straight nozzle is connected with the burner.

According to an embodiment of the present utility model, the direct injection nozzle includes a nozzle pipe and a nozzle body connected to the nozzle pipe, the nozzle pipe is connected to the burner, and the nozzle body is connected to the pipe body.

According to one embodiment of the utility model, the nozzle pipe is provided with a plurality of primary air mixing holes along the circumferential direction of the nozzle pipe, when the fuel gas flows through the primary air mixing holes, the fuel gas is mixed with air entering the direct injection nozzle through the primary air mixing holes to form primary air mixing, and the nozzle air outlet end of the nozzle main body extends to a position flush with the primary air mixing holes.

According to one embodiment of the utility model, the nozzle opening of the nozzle body is in a tapered boss structure, the bottom of the nozzle opening is flush with the front end of the primary air mixing hole along the air flow direction, and the top of the nozzle opening is flush with the center of the primary air mixing hole.

According to an embodiment of the utility model, the angle of incidence of the nozzle opening is 40 ° to 50 °.

According to one embodiment of the utility model, the nozzle pipe is provided with a second-stage air mixing hole penetrating along the radial direction of the direct injection nozzle at the rear end of the first-stage air mixing hole along the air flow direction, and the first-stage air mixing hole is mixed with air entering the direct injection nozzle through the second-stage air mixing hole to form a second-stage air mixing when the first-stage air mixing gas flows through the second-stage air mixing hole.

According to an embodiment of the present utility model, the diameter of the secondary air mixing hole is 5.5mm to 6.5mm.

According to one embodiment of the present utility model, the burner further includes a dual-channel valve body, the dual-channel valve body includes a valve body air inlet end and two valve body air outlet ends, the valve body air inlet end is communicated with an indoor air supply pipeline, and the two valve body air outlet ends are communicated with the first air inlet and the second air inlet.

According to another aspect of the present utility model, a cooktop is provided. The cooker comprises the burner, a cooker shell and a cooker panel. The stove shell is surrounded with a stove cavity for installing the burner main body; the kitchen range panel is connected to the kitchen range shell, and a kitchen range opening through which the top of the burner passes is formed in the kitchen range panel.

One embodiment of the present utility model has the following advantages or benefits:

according to the burner disclosed by the utility model, the first air inlet is controlled, the outer ring flame and the direct-injection flame are controlled at the same time, and the second air inlet is controlled, so that the flame is ensured to cover the whole bottom of the pot during quick-frying, and an annular flame is formed at the bottom of the pot during soup cooking, so that the problem of burning the soup is avoided; the secondary air mixing holes are formed in the rear end of the primary air mixing holes along the air flowing direction, so that the difficulty that secondary air cannot be supplemented when the top of a straight air spraying channel of the burner is provided with a plurality of dense holes which are vertically and upwards distributed is solved, and the problems that direct spraying flames are easy to yellow flames and the content of CO in smoke is easy to exceed the standard are solved; the gas is controlled through the double-channel valve body and simultaneously passes through the first air inlet and the second air inlet, or only passes through the second air inlet, so that the problems of complicated pipeline of the gas circuit arranged inside the kitchen range, high manufacturing cost and the like in the prior art are solved when the three-ring fire burner is controlled by the three-channel control valve body to control the change of air inflow and firepower.

Drawings

The above and other features and advantages of the present utility model will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

FIG. 1 is an exploded view of a combustor shown in accordance with an exemplary embodiment.

Fig. 2 is a perspective view of a nozzle holder of a combustor, according to an exemplary embodiment.

FIG. 3 is another perspective view of a nozzle holder of a combustor, according to an exemplary embodiment.

FIG. 4 is an internal schematic view of a nozzle holder of a combustor, according to an exemplary embodiment.

FIG. 5 is an internal schematic view of a direct injection nozzle of a combustor, according to an exemplary embodiment.

FIG. 6 is a perspective view of a cooktop according to an example embodiment.

FIG. 7 is an exploded view of a cooktop shown according to an exemplary embodiment.

Wherein reference numerals are as follows:

1. a burner body; 11. a burner; 111. an outer annular airway; 112. an inner annular airway; 113. a direct injection air passage; 12. an outer ring injection pipe; 121. an outer ring injection pipe main body; 122. an outer ring nozzle; 13. an inner ring injection pipe; 131. an inner ring ejector tube body; 132. an inner ring nozzle; 14. a direct injection pipeline; 141. a pipeline main body; 142. a direct injection nozzle; 1421. a nozzle tube; 14211. a first-stage air mixing hole; 14212. a second-stage air mixing hole; 1422. a nozzle body; 14221. a nozzle opening; 14222. a nozzle support; 2. a nozzle holder; 21. a first air inlet; 22. a first air outlet; 23. a second air inlet; 24. a second air outlet; 25. a third air outlet; 26. a first channel; 27. a second channel; 3. a dual-channel valve body; 31. an air inlet end of the valve body; 32. an air outlet end of the valve body; 33. a valve stem; 4. a stove housing; 41. a stove cavity; 5. a stove panel; 51. a stove opening; 52. a valve stem bore.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted.

The terms "a," "an," "the," and "said" are used to indicate the presence of one or more elements/components/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. in addition to the listed elements/components/etc.

As shown in fig. 1 to 7, fig. 1 shows an exploded view of a burner provided by the present utility model. Fig. 2 shows a perspective view of a nozzle holder 2 of a burner according to the utility model. Fig. 3 shows another perspective view of a nozzle holder 2 of a burner according to the utility model. Fig. 4 shows a schematic interior view of a nozzle holder 2 of a burner according to the present utility model. Fig. 5 shows an internal schematic view of a direct injection nozzle 142 of a combustor provided by the present utility model. Fig. 6 shows a perspective view of a hob provided by the present utility model. Fig. 7 shows an exploded view of a hob provided by the present utility model.

The burner of the embodiment of the present utility model includes a burner body 1 and a nozzle holder 2. The burner main body 1 comprises a burner 11, an outer ring injection pipe 12, an inner ring injection pipe 13 and a direct injection pipeline 14 which are respectively connected with the burner 11, so as to guide fuel gas to the top of the burner 11 to form outer ring flame, inner ring flame and direct injection flame positioned in the middle of the inner ring flame; the nozzle seat 2 is connected to the burner main body 1, the nozzle seat 2 is provided with 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 injection pipe 12 is communicated with the first air outlet 22, the inner ring injection 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, and the second air inlet 23 and the second air outlet 24 are communicated through a second channel 27.

As shown in fig. 1 to 4, the burner 11 is surrounded with an outer ring air channel 111, an inner ring air channel 112 and a direct injection air channel 113 which are sequentially distributed from outside to inside, the outer ring injection pipe 12 is communicated with the outer ring air channel 111, the inner ring injection pipe 13 is communicated with the inner ring air channel 112, the direct injection pipe 14 is communicated with the direct injection air channel 113, wherein the outer ring injection pipe 12 comprises an outer ring injection pipe main body 121 and an outer ring nozzle 122, the outer ring nozzle 122 is installed and extends into the throat of the outer ring injection pipe main body 121, when fuel gas flows through the outer ring nozzle 122, negative pressure is generated, air enters the outer ring nozzle 122 from a gas mixing hole of the outer ring nozzle 122 through the negative pressure effect and then enters the outer ring injection pipe main body 121 after being mixed with fuel gas, the inner ring injection pipe 13 comprises an inner ring injection pipe main body 131 and an inner ring nozzle 132, when fuel gas flows through the inner ring nozzle 132 and generates negative pressure when the fuel gas flows through the throat of the inner ring injection pipe main body 131, and the air enters the inner ring nozzle 132 after being mixed with the fuel gas through the negative pressure effect.

Further, the inner ring nozzle 132 and the outer ring nozzle 122 are fixedly connected or integrally formed into a whole side by side, the front side of the nozzle seat 2 and the front side of the outer ring nozzle 122 are riveted or welded or connected through screws, the rear side of the nozzle seat 2 and the rear side of the inner ring nozzle 132 are riveted or welded or connected through screws, the outer ring injection pipe 12 is further communicated with the first air outlet 22, the inner ring injection pipe 13 is communicated with the second air outlet 24, the direct injection pipeline 14 is communicated with the third air outlet 25, the first air inlet 21 is respectively communicated with the first air outlet 22 and the third air outlet 25 through the first channel 26, after fuel gas enters the nozzle seat 2 through the first air inlet 21, a part of fuel gas enters the outer ring injection pipe 12 through the first air outlet 22, another part of fuel gas enters the direct injection pipeline 14 through the third air outlet 25, therefore, when the first air inlet 21 is closed or opened, the outer ring flame and the direct-injection flame can be synchronously controlled, and meanwhile, the second air inlet 23 and the second air outlet 24 are communicated through the second channel 27, so that when the second air inlet 23 is closed or opened, the inner ring flame can be controlled, therefore, when the quick-frying is needed, the first air inlet 21 and the second air inlet 23 are simultaneously opened, so that the flames are uniformly distributed on the whole bottom of the pot, when the soup is needed to be cooked, the first air inlet 21 and the second air inlet 23 are closed, the annular flame can be formed on the bottom of the pot, the temperature of the bottom of the pot in the prior art is reduced, and further, the heat load of the inner ring flame is controlled to be between 200W and 300W, and the soup in the pot can be kept in a micro-boiling or heat-preserving state in a medium-low temperature state all the time, so that the problem that the soup can be dried by cooking for a long time is avoided.

In a preferred embodiment of the present utility model, the direct injection pipe 14 includes a pipe body 141 and a direct injection nozzle 142 connected in sequence, the pipe body 141 being in communication with the third air outlet 25, the direct injection nozzle 142 being connected to the burner 11.

As shown in fig. 1 and 5, the front end of the pipe body 141 along the gas flow direction is connected to the third gas outlet 25, and the rear end of the direct injection nozzle 142 along the gas flow direction is connected to the direct injection gas passage 113 of the burner 11, so that the direct injection flame at the top of the direct injection gas passage 113 can be fully combusted by mixing with air through the air mixing hole on the direct injection nozzle 142.

In a preferred embodiment of the present utility model, the direct injection nozzle 142 includes a nozzle pipe 1421 and a nozzle body 1422 connected to the nozzle pipe 1421, the nozzle pipe 1421 being connected to the burner 11, the nozzle body 1422 being connected to the pipe body 141.

As shown in fig. 1 and 5, the rear end of the nozzle pipe 1421 in the gas flow direction is connected to the direct injection channel 113 of the burner 11, the front end of the nozzle body 1422 in the gas flow direction is connected to the pipe body 141, the air mixing hole is formed in the nozzle pipe 1421, when the gas flows through the air mixing hole of the nozzle pipe 1421, negative pressure is generated, and air enters the nozzle pipe 1421 through the air mixing hole by the negative pressure effect and then enters the direct injection channel 113 of the burner 11 after being mixed with the gas.

In a preferred embodiment of the present utility model, the nozzle pipe 1421 is provided with a plurality of primary air-mixing holes 14211 circumferentially around the nozzle pipe, and the fuel gas flows through the primary air-mixing holes 14211 to be mixed with air entering the direct injection nozzle 142 through the primary air-mixing holes 14211 to form a primary air-mixing gas, and the nozzle outlet end of the nozzle body 1422 extends to a position flush with the primary air-mixing holes 14211.

As shown in fig. 1 and 5, the nozzle pipe 1421 has a tubular structure, a plurality of primary air mixing holes 14211 are formed along the circumferential direction of the nozzle pipe 1421 at equal intervals, and when the nozzle air outlet end of the nozzle main body 1422 extends to the primary air mixing holes 14211, the gas generates a negative pressure effect at the primary air mixing holes 14211, so that the air is brought into the primary air mixing holes 14211 to be mixed with the primary air mixing holes for the first time, thereby generating primary mixed gas.

In a preferred embodiment of the present utility model, the nozzle opening 14221 of the nozzle body 1422 has a tapered boss structure, the bottom of the nozzle opening 14221 is flush with the front end of the primary air-mixing hole 14211 in the gas flow direction, and the top of the nozzle opening 14221 is flush with the center of the primary air-mixing hole 14211. The incident angle of the nozzle port 14221 is 40 ° to 50 °.

As shown in fig. 5, the nozzle body 1422 includes a nozzle support 14222 and a nozzle opening 14221 connected to the nozzle support 14222, wherein the top surface of the nozzle support 14222, i.e., the bottom of the nozzle opening 14221 is flush with the front end of the primary air mixing hole 14211 in the air flow direction, the cross section of the nozzle opening 14221 in the axial direction of the nozzle body 1422 is triangular, and gradually reduces in the air flow direction, and the top of the nozzle opening 14221 extends to the center of the primary air mixing hole 14211, so that the gas can be mixed with the air entering through the primary air mixing hole 14211 immediately after being ejected from the nozzle opening 14221, thereby improving the efficiency of the first mixing of the gas and the air. The incidence angle of the nozzle 14221 is 40-50 degrees, so that the flow loss of the fuel gas can be further reduced, and the injection capacity is improved.

In a preferred embodiment of the present utility model, the nozzle pipe 1421 is provided with a secondary air-mixing hole 14212 penetrating the primary air-mixing hole 14211 in the radial direction of the direct injection nozzle 142 at the rear end of the primary air-mixing hole 14211 in the gas flow direction, and the primary air-mixing hole is mixed with air entering the direct injection nozzle 142 through the secondary air-mixing hole 14212 to form a secondary air-mixing gas when the primary air-mixing gas flows through the secondary air-mixing hole 14212.

As shown in fig. 1 and fig. 5, the secondary air mixing hole 14212 penetrates through the direct injection nozzle 142 along the radial direction, so that the secondary air mixing hole 14212 is communicated with the inner cavity of the nozzle pipe 1421, when the primary air mixing hole 14212 flows through the secondary air mixing hole 14212, negative pressure is generated, and secondary air enters the nozzle pipe 1421 through the secondary air mixing hole 14212, so that the primary air mixing hole and secondary air are mixed, the difficulty that secondary air cannot be supplemented when the top of the direct injection air channel 113 of the burner 11 is provided with a plurality of dense holes distributed vertically upwards is solved, and the problems that direct injection flames are easy to yellow flame and the content of CO in smoke is easy to exceed standard are avoided.

In a preferred embodiment of the present utility model, the secondary air mixing holes 14212 have a diameter of 5.5mm to 6.5mm.

The primary mixed gas has a certain speed when being sprayed out from the tapered nozzle 14221, and the diameter of the secondary mixed gas hole 14212 is 5.5mm to 6.5mm, so that the gas can be ensured not to leak when passing through the secondary mixed gas hole 14212.

In a preferred embodiment of the present utility model, the burner further comprises a dual-channel valve body 3, the dual-channel valve body 3 comprising a valve body inlet end 31 and two valve body outlet ends 32, the valve body inlet end 31 being in communication with the indoor air supply line, the two valve body outlet ends 32 being in communication with the first air inlet 21 and the second air inlet 23.

As shown in fig. 1, the dual-channel valve body 3 is preferably a dual-channel plug valve, and has one valve body air inlet end 31 and two valve body air outlet ends 32, wherein the valve body air inlet end 31 is communicated with an indoor air supply pipeline, one valve body air outlet end 32 is communicated with the first air inlet 21, and the other valve body air outlet end 32 is communicated with the second air inlet 23, so that when the valve rod 33 of the dual-channel valve body 3 is rotated, fuel gas can be controlled to pass through the first air inlet 21 and the second air inlet 23 at the same time, or only pass through the second air inlet 23.

The burner of the utility model 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 whole pan bottom during quick-frying and forms an annular flame at the pan bottom during soup cooking, and avoiding the problem of burning soup dry; the secondary air mixing holes 14212 are formed in the rear end of the primary air mixing holes 14211 along the air flow direction, so that the difficulty that secondary air cannot be supplemented when the top of the direct-injection air channel 113 of the burner 11 is provided with a plurality of dense holes which are vertically upwards distributed is solved, and the problems that direct-injection flames are easy to yellow flame and the content of CO in smoke is easy to exceed the standard are avoided; the gas is controlled through the double-channel valve body 3 and simultaneously passes through the first air inlet 21 and the second air inlet 23, or only passes through the second air inlet 23, so that the problems that when the three-ring fire burner in the prior art controls the change of air inflow and firepower through the three-channel control valve body, the pipeline for arranging the gas circuit inside the kitchen range is complex, the kitchen range bottom shell with large opening size is required, and the manufacturing cost is high are solved.

The cooktop of the embodiment of the utility model comprises the burner, the cooktop shell 4 and the cooktop panel 5. The stove housing 4 is surrounded with a stove cavity 41 in which the burner main body 1 is mounted; the stove panel 5 is connected to the stove housing 4, and the stove panel 5 is provided with a stove opening 51 through which the top of the stove head 11 passes.

As shown in fig. 6 and 7, the stove housing 4 encloses the stove cavity 41 with an opening at the top, the stove panel 5 is provided with a stove opening 51, when the burner main body 1 corresponds to the stove cavity 41 and is fixedly connected with the stove housing 4, the top of the stove head 11 penetrates out of the stove opening 51, further, the stove panel 5 is also provided with a valve rod hole 52 for installing the double-channel valve body 3, after the burner main body 1 is arranged in the stove cavity 41, the valve rod 33 of the double-channel valve body 3 extends out of the valve rod hole 52, so that a knob can be covered on the valve rod 33 of the double-channel valve body 3 from one side of the stove panel 5 far away from the stove housing 4, and thus the stove can be controlled to be in a stir-frying mode or a soup cooking mode through the rotation of the knob, thereby solving the problems that in the prior art, when the three-ring-fire burner is controlled by the three-channel valve body to control the change of the air inflow and the fire, the pipeline of the gas path is complicated, the bottom shell of the stove with large opening size is needed, and the manufacturing cost is high.

In embodiments of the present utility model, the term "plurality" refers to two or more, unless explicitly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly attached, detachably attached, or integrally attached. The specific meaning of the above terms in the embodiments of the present utility model will be understood by those of ordinary skill in the art according to specific circumstances.

In the description of the embodiments of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present utility model and to simplify the description, and do not indicate or imply that the devices or units referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the embodiments of the present utility model.

In the description of the present specification, the terms "one embodiment," "a preferred embodiment," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present utility model and is not intended to limit the embodiment of the present utility model, and various modifications and variations can be made to the embodiment of the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present utility model should be included in the protection scope of the embodiments of the present utility model.

Claims (10)

1. A burner, comprising:

the burner comprises a burner body (1), wherein the burner body (1) comprises a burner (11), an outer ring injection pipe (12), an inner ring injection pipe (13) and a straight spray pipe path (14) which are respectively connected with the burner (11) so as to guide fuel gas to the top of the burner (11) to form an outer ring flame, an inner ring flame and a straight spray flame positioned in the middle of the inner ring flame; and

the burner comprises a burner body (1), a nozzle seat (2), wherein the nozzle seat (2) is connected to the burner body (1), the nozzle seat (2) is provided with 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 injection pipe (12) is communicated with the first air outlet (22), the inner ring injection pipe (13) is communicated with the second air outlet (24), and the direct injection pipeline (14) is communicated with the third air outlet (25);

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).

2. Burner according to claim 1, characterized in that said direct injection duct (14) comprises a duct body (141) and a direct injection nozzle (142) connected in sequence, said duct body (141) being in communication with said third air outlet (25), said direct injection nozzle (142) being connected with said burner (11).

3. The burner according to claim 2, wherein the direct injection nozzle (142) comprises a nozzle pipe (1421) and a nozzle body (1422) connected to the nozzle pipe (1421), the nozzle pipe (1421) being connected to the burner (11), the nozzle body (1422) being connected to the pipe body (141).

4. A burner according to claim 3, wherein the nozzle pipe (1421) is provided with a plurality of primary air mixing holes (14211) along the circumferential direction thereof, the gas flowing through the primary air mixing holes (14211) is mixed with the air entering the direct injection nozzle (142) through the primary air mixing holes (14211) to form a primary air mixture, and the nozzle outlet end of the nozzle body (1422) extends to a position flush with the primary air mixing holes (14211).

5. The burner according to claim 4, wherein the nozzle opening (14221) of the nozzle body (1422) has a tapered boss structure, the bottom of the nozzle opening (14221) is flush with the front end of the primary air-mixing hole (14211) in the gas flow direction, and the top of the nozzle opening (14221) is flush with the center of the primary air-mixing hole (14211).

6. The burner according to claim 5, wherein the angle of incidence of the nozzle opening (14221) is 40 ° to 50 °.

7. The burner according to claim 4, wherein the nozzle pipe (1421) is provided with a secondary air-mixing hole (14212) penetrating in the radial direction of the direct injection nozzle (142) at the rear end of the primary air-mixing hole (14211) in the gas flow direction, and the primary air-mixing hole (14212) is mixed with air entering the direct injection nozzle (142) through the secondary air-mixing hole (14212) to form a secondary air-mixing gas.

8. The burner of claim 7, wherein the secondary mixing holes (14212) have a diameter of 5.5mm to 6.5mm.

9. The burner according to claim 1, further comprising a dual channel valve body (3), said dual channel valve body (3) comprising a valve body inlet end (31) and two valve body outlet ends (32), said valve body inlet end (31) being in communication with an indoor air supply line, two of said valve body outlet ends (32) being in communication with said first air inlet (21) and said second air inlet (23).

10. A cooktop, comprising:

the burner of any one of claims 1 to 9;

a stove housing (4), wherein a stove cavity (41) for installing the burner main body (1) is formed around the stove housing (4); and

the stove comprises a stove panel (5), wherein the stove panel (5) is connected to the stove shell (4), and a stove opening (51) for allowing the top of the stove head (11) to pass through is formed in the stove panel (5).

Images