CN115899691A - Gas nozzle and gas stove - Google Patents

Abstract

The application discloses gas nozzle and gas-cooker belongs to combustion apparatus's technical field to solve the limited technical problem of present gas nozzle's air injection volume. Wherein, gas nozzle includes the body, has gas passageway, air passage, mixes the passageway in advance and mixes the gas passageway in the body, the body surface offer with the gas air inlet of gas passageway intercommunication, and with the air inlet of air passage intercommunication, the gas passageway through mix the passageway in advance with mix the gas passageway intercommunication, the air passage through mix the passageway in advance with mix the gas passageway intercommunication, and the air passage with mix the inner wall transitional coupling of passageway in advance. Air channel's inner wall and the inner wall transitional coupling who mixes the passageway in, transitional coupling can guide the air admission in the air channel to mixing in the passageway in for the outside air of body is changeed and is got into to mixing in the passageway through air channel, thereby promotes the air of this application and draws and penetrate the ability.

Description

Gas nozzle and gas stove

Technical Field

The application belongs to the technical field of combustion device, especially, relate to a gas nozzle and gas-cooker.

Background

The gas stove is a kitchen utensil heated by direct fire with liquefied petroleum gas (liquid), artificial gas, natural gas and other gas fuels. The gas fuel is introduced into the gas stove, and the gas fuel is mixed with air, and then the mixed gas is ignited to generate direct fire. The nozzle in the gas stove is communicated with the injection pipe, and the gas fuel and the air enter the injection pipe after entering the nozzle.

Among the correlation technique, gas nozzle is provided with solitary gas passageway and air passage, and gas accessible gas passageway gets into to gas nozzle in, and air accessible air passage gets into to the nozzle in, because gas and air flow direction before mixing is different, and the velocity of flow of gas is faster, and the gas can influence the air admission to gas nozzle in like this, and then influences gas nozzle's air and draw and penetrate the ability and be relatively weak.

Disclosure of Invention

The application aims to solve the technical problem that the air injection quantity of the existing gas nozzle is limited at least to a certain extent. Therefore, the application provides a gas nozzle and a gas stove.

The embodiment of the application provides a gas nozzle, which comprises a pipe body,

the tube body is internally provided with a gas channel, an air channel, a premixing channel and a gas mixing channel, the surface of the tube body is provided with a gas inlet communicated with the gas channel and an air inlet communicated with the air channel,

the gas channel passes through the premixing passageway with mix the gas channel intercommunication, the air passage passes through the premixing passageway with mix the gas channel intercommunication, just the air passage with the inner wall transitional coupling of premixing passageway.

In the gas nozzle that this application embodiment provided, the gas passes through the gas passageway and enters into to premixing passageway, air accessible air passage enters into to premixing passageway, air guide in the inner wall of air passage and premixing passageway's inner wall transitional coupling can be to the air passage, make the air change enter into to premix the passageway in with the gas mixture, in order to guarantee that sufficient air can enter into to premix the passageway, air and gas can further mix after entering into to mixing the gas passageway like this, make the gas nozzle exhaust gas mixture of this application light the flame that the back produced more stable.

In some embodiments, the air channel and the premix channel are provided with a transition section which is bent or curved towards the extension of the premix channel.

The transition section is bent or bent towards the extending direction of the premixing channel, so that the transition section can guide the air in the air channel to enter the premixing channel, the flowing direction of the air entering the premixing channel is higher in consistency with the flowing direction of the gas in the premixing channel, and the gas can drive the air to enter the gas mixing channel.

In some embodiments, the inner wall of the transition section is at least one of a slope, an arc, a multi-segment slope, and a multi-segment arc.

The inclined surface, the arc surface, the multiple sections of inclined surfaces and the multiple sections of arc surfaces are bent or bent towards the extending direction of the premixing channel, so that the air guiding effect can be achieved.

In some embodiments, the gas channel, the premixing channel and the gas mixing channel penetrate the tube body along an axial direction of the tube body, the air inlet is opened in a side wall of the tube body, and the air channel extends from the side wall of the tube body to be communicated with the premixing channel.

The gas channel, the premixing channel and the gas carrying channel are reasonable in layout by the arrangement, so that the purpose of reducing the volume of the pipe body is achieved.

In some embodiments, the axial direction of the air passage is co-directional with the radial direction of the tube body.

The air inlet is arranged on the side wall of the tube body, so that the volume of the tube body is relatively small under the condition that the air inlet keeps a large opening area.

In some embodiments, the gas mixing channel has an opposite gas mixing inlet end and an opposite gas mixing outlet end, the gas mixing inlet end is communicated with the premixing channel, and the inner diameter of the gas mixing channel gradually decreases in the direction from the gas mixing inlet end to the gas mixing outlet end.

Mix the internal diameter of gas passageway and reduce gradually for mix the gas passageway and have the convergent structure, can promote the velocity of flow through mixing the gas passageway's mist like this, thereby make the outside air quantity that enters into to the body of body increase, and then make the gas nozzle's of this application air to draw and penetrate the ability reinforce.

In some embodiments, the number of the air inlets is plural, and the plural air inlets are distributed along a circumferential direction of the pipe body.

Through setting up a plurality of air inlet settings, can promote the air injection ability of the gas nozzle of this application.

In some embodiments, the pipe body includes a first pipe portion and a second pipe portion, the first pipe portion is detachably connected with the second pipe portion, the gas mixing passage is disposed in the second pipe portion, and the gas passage, the air passage and the premixing passage are disposed in the first pipe portion.

First pipe portion and second pipe portion can prepare alone to reduce the preparation degree of difficulty of body.

In some embodiments, the gas passage has an inner diameter that gradually decreases in a direction from the gas inlet to the premix passage.

Through setting up the gas passageway into the convergent structure for the gas can acceleratedly enter into to premixing and lead to in through the gas passageway, thereby makes the gas of the gas nozzle of this application draw and penetrate the ability reinforce.

In a second aspect, based on the above gas nozzle, the present application proposes a gas range comprising the above gas nozzle.

After being applied to the gas stove, the gas nozzle can enhance the air injection capacity and the gas injection capacity of the gas stove, so that flame force of flame generated by the gas stove is stronger, and stability is better.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 illustrates a schematic internal view of a gas burner disclosed in an embodiment of the present application;

FIG. 2 is a schematic view of the overall structure of the gas nozzle disclosed in the embodiment of the present application;

FIG. 3 illustrates a schematic cross-sectional view of a gas nozzle disclosed in an embodiment of the present application from a second perspective;

fig. 4 shows a schematic cross-sectional view of a gas nozzle disclosed in an embodiment of the present application from a third perspective.

Reference numerals are as follows:

100-pipe body, 110-gas inlet, 120-air inlet, 130-air outlet,

200-first pipe section, 210-gas channel, 220-air channel, 230-premix channel, 240-transition section,

300-a second pipe part, 310-a gas mixing channel, 311-a gas mixing inlet end, 312-a gas mixing outlet end,

400-thread section.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indications in the embodiments of the present invention are only used to explain the relative position relationship, the motion situation, and the like between the components in a certain posture, and if the certain posture is changed, the directional indication is changed accordingly.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between the embodiments may be combined with each other, but must be based on the realization of the technical solutions by a person skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The application is described below with reference to specific embodiments in conjunction with the following drawings:

example one

Referring to fig. 1 to 4, an embodiment of the present application discloses a gas nozzle, which includes a tube 100. The gas nozzle can be applied to combustion equipment such as a gas stove.

Referring to fig. 1, the tube 100 is a base member of the gas nozzle, and the tube 100 may provide a mounting base for at least some other components of the gas nozzle. The pipe body 100 has a passage inside, the pipe body 100 is provided with a gas inlet 110 and an air inlet 120, and the pipe body 100 can be connected with a gas pipe through the gas inlet 110, so that gas can enter the pipe body 100 through the gas inlet 110. Air may enter the tube 100 through the air inlet 120, and the air may be mixed with the gas entering the tube 100 to form a mixed gas.

Referring to fig. 1 and 2, a gas channel 210, an air channel 220, a premixing channel 230 and a gas mixing channel 310 are disposed in the tube 100, wherein one end of the gas channel 210 extends to the surface of the tube 100 to communicate with the gas inlet 110, and the other end of the gas channel 210 communicates with the gas mixing channel 310 through the premixing channel 230. The gas in the gas pipe may enter the gas channel 210 through the gas inlet 110, and then pass through the premixing channel 230 and the gas mixing channel 310.

Air from outside the gas nozzle may enter the air passage 220 through the air inlet 120 and then enter the premixing passage 230, and since both the gas and the air enter the premixing passage 230, the gas and the air may meet in the premixing passage 230 for preliminary mixing. The premixing passage 230 is further communicated with the gas mixing passage 310, the preliminary mixed gas formed by the intersection of the gas and the air in the premixing passage 230 can enter the gas mixing passage 310, and the mixed gas can be further mixed in the gas mixing passage 310, so that the flame formed after the mixed gas is ignited is more continuously stable.

Specifically, since the gas introduced into the gas passage 210 through the gas pipe has a relatively fast flow rate, the gas may bring the air outside the gas nozzle into the pipe body 100 through the air inlet 120. Of course, a corresponding air inlet pipe may be specially provided, the air inlet pipe is connected to the air inlet 120 of the tube 100, and the air inlet pipe may inject air with a certain pressure into the tube 100. The air inlet mode of the gas nozzle is not limited in the application.

Since the gas channel 210 and the air channel 220 are independent of each other, the interface between the gas channel 210 and the premixing channel 230 and the connection between the air channel 220 and the premixing channel 230 are different, so that the direction of the gas flow entering the premixing channel 230 and the direction of the air flow entering the premixing channel 230 are different, which causes the gas and the air to influence each other and affects the mixing effect of the gas and the air.

In order to achieve better mixing effect between the gas and the air, the inner wall of the air passage 220 and the inner wall of the premixing passage 230 may be in transition connection, and the transition connection may guide the air in the air passage 220, so that the flow direction of the air is gradually close to the flow direction of the gas in the process of entering the premixing passage 230, which may prevent the air from directly impacting the gas in the premixing passage 230, so that the air is more easily entered into the premixing passage 230, thereby ensuring that a sufficient amount of air may enter into the premixing passage 230 to be mixed with the gas. Meanwhile, the gas and air mixing effect can be prevented from being influenced by mutual interference of the air and the gas, so that the gas and the air have a better mixing effect in the premixing channel 230, and flame formed by igniting the mixed gas after passing through the gas mixing channel 310 is more stable.

In the gas nozzle that this application embodiment provided, gas enters into premix passageway 230 through gas passageway 210, air accessible air passageway 220 enters into premix passageway 230, the air direction guide in air passageway 220 can be to the inner wall transitional coupling of air passageway 220 and premix passageway 230 for the air is changeed and is entered into in premix passageway 230 and mixes with the gas, in order to guarantee that sufficient air can enter into premix passageway 230, air and gas can further mix after entering into in mixing passageway 310 like this, make the flame that produces after the gas nozzle exhaust gas of this application ignites more stable.

Referring to fig. 1, in an embodiment, in order to transition the inner wall of the air passage 220 and the inner wall of the premixing passage 230, a transition section 240 may be disposed between the air passage 220 and the premixing passage 230, and the transition section 240 may be disposed in a curved or bent manner toward the extending direction of the premixing passage 230, such that the transition section 240 may guide the air of the air passage 220 to enter the premixing passage 230 through the transition section 240 along the inner wall of the transition section 240, such that the flow direction of the air after passing through the transition section 240 is close to or consistent with the flow rate of the gas entering the premixing passage 230, such that the air can more easily enter the premixing passage 230 and be mixed with the gas in the premixing passage 230 to flow to the gas mixing passage 310.

Specifically, the inner wall of the transition section 240 may be an inclined surface, and the inclined surface may be bent toward the extending direction of the premixing channel 230, or the inner wall of the transition section 240 may be provided with multiple inclined surfaces, the multiple inclined surfaces are connected, and each inclined surface of the multiple inclined surfaces is bent toward the extending direction of the premixing channel 230. The air entering the transition section 240 may be guided multiple times by providing multiple sections of inclined surfaces, so that the flow direction of the air after entering the premixing passage 230 is closer to or consistent with the flow direction of the gas in the premixing passage 230.

Of course, the inner wall of the transition section 240 may also be configured as an arc surface, the arc surface may be curved toward the extending direction of the premixing channel 230, a junction between the inner wall of the transition section 240 and the inner wall of the air channel 220 may be avoided by configuring the arc surface, and a cold corner may occur at the junction between the inner wall of the transition section 240 and the inner wall of the premixing channel 230, so that the flow direction of the air after the air enters the premixing channel 230 is more easily guided to be close to or consistent with the extending direction of the premixing channel 230, and thus the flow direction of the air is more close to or consistent with the flow direction of the gas entering the premixing channel 230.

The inner wall of the transition section 240 can be further provided with a plurality of arc surfaces, and the multi-surface arc surfaces can guide the air entering the transition section 240 for multiple times, so that the air flow direction guiding effect is better.

Referring to fig. 1, in some embodiments, the gas passages 210, the premixing passages 230 and the mixing passages 310 may be disposed along the axial direction of the tube 100 and extend through the tube 100, in order to make the positions of the passages in the tube 100 more reasonable and reduce the volume of the tube 100. Thus, the gas inlet 110 may be disposed at one side end of the tube 100, and correspondingly, the gas outlet 130 may be disposed at the other side end of the tube 100, the gas outlet 130 is communicated with the gas mixing channel 310, and the gas outlet 130 is disposed opposite to the gas inlet 110. The gas channel 210 is arranged in the same direction as the premixing channel 230, so that the gas in the gas channel 210 can enter the premixing channel 230 more easily, and the gas can enter the gas stove through the gas nozzle more quickly.

Specifically, the central axes of the gas channel 210, the premixing channel 230 and the gas mixing channel 310 and the central axis of the tube 100 can be collinear, so that the gas channel 210, the premixing channel 230 and the gas mixing channel 310 are located at the center of the tube 100, thereby enabling the structural standard of the tube 100 to be favorable for preparing the tube 100, and simultaneously reducing the volume of the tube 100.

The air inlet 120 can be opened on the lateral wall of the tube 100, and correspondingly, the air channel 220 extends from the lateral wall of the tube 100 to communicate with the premixing channel 230 in the tube 100, and the air inlet 120 is disposed on the lateral wall of the tube 100 so that the opening of the air inlet 120 is disposed at a larger position, the inner and outer diameter of the tube 100 is not increased, and the volume of the tube 100 is reduced.

Referring to fig. 1 and 2, in some embodiments, in order to allow air to more efficiently enter the premix passage 230 through the air passage 220, the air passage 220 may extend in the same direction as the radial direction of the tube 100, which may minimize the length of the air passage 220 and, accordingly, the air may travel a shorter distance through the air passage 220.

Of course, the air passages 220 may be inclined with respect to the axial direction of the tube 100 in order to facilitate the introduction of air from the air passages 220 into the premix passage 230. Specifically, the air inlet 120 may be opened on the sidewall of the tube 100 and disposed in a staggered manner with the premixing channel 230, so that the air channel 220 is also disposed obliquely, the air is guided in a primary direction through the air channel 220, the air flowing direction is close to the gas flowing direction into the premixing channel 230, and then the air is guided in a secondary direction through the transition section 240 after passing through the transition section 240, and the air flowing direction is closer to the gas flowing direction in the premixing channel 230 after passing through the secondary direction.

Of course, in order to solve the problem that the misalignment between the air inlet 120 and the premixing channel 230 leads to the increase of the length of the air channel 220 and thus the increase of the air stroke through the air channel 220, the air inlet 120 may be communicated with a gas pressurizing device, and the gas pressurizing device may introduce air with a pressure greater than atmospheric pressure into the air channel 220, so that the gas entering the air channel 220 has a faster flow rate, and thus the air may rapidly enter the premixing channel 230 through the air channel 220.

It should be noted that when the air inlet 120 is offset from the premixing passage 230, a transition section 240 may be disposed at the air inlet 120, and the transition section 240 may facilitate the introduction of air from the outside of the nozzle body 100 into the air passage 220.

In some embodiments, the end of the air mixing channel 310 connected to the premixing channel 230 is an air mixing inlet end 311, the other end of the air mixing channel 310 is an air mixing outlet end 312, and the air mixture in the air mixing channel 310 can be discharged out of the air mixing channel 310 through the air mixing outlet end 312. In the direction from the gas mixing inlet end 311 to the gas mixing outlet end 312, the inner diameter of the gas mixing channel 310 is gradually reduced, so that the gas mixing channel 310 is in a tapered structure, and thus the flow rate of the mixed gas passing through the gas mixing channel 310 can be increased, and the mixed gas can accelerate to pass through the gas mixing channel 310. Can promote the mixed gas flow who enters into in the gas-cooker through the gas nozzle of this application like this to can make and generate stronger flame in the gas-cooker.

After the mist accelerates through mixing the gas passageway 310, it is corresponding, can make the mixed gas flow that enters into in mixing the gas passageway 310 increase, will enter into the certain circumstances of gas flow control in the body 100, can make and get into the air flow lift to premixing the passageway 230 by air passage 220, can promote the concentration of air among the mixed gas like this, strengthen the gas nozzle of this application and draw the ability of penetrating the air, make the gas combustible combustion more abundant, reduce the waste gas volume.

Referring to fig. 1 to 4, in some embodiments, in order to further improve the air injection capability of the gas nozzle of the present application, a plurality of air inlets 120 may be provided on the tube 100, and correspondingly, a plurality of air passages 220 are also provided, the plurality of air passages 220 are respectively communicated with the plurality of air inlets 120, so that the air outside the tube 100 may enter the premixing passage 230 in the tube 100 through the plurality of air inlets 120, thereby improving the air flow entering the premixing passage 230, further improving the concentration of the air in the mixed gas discharged from the gas nozzle of the present application, and further improving the air injection capability of the gas nozzle, so that the gas combustion is more sufficient.

The plurality of air inlets 120 may be uniformly distributed along the circumference of the tube 100, and accordingly, the plurality of air passages 220 may be uniformly distributed in the tube 100 along the circumference of the tube 100, so that the air flow of the air entering the premixing passage 230 through each air passage 220 may be maintained stably. Thereby facilitating the entry of multiple air streams into the premix passage 230.

In some embodiments, to facilitate the preparation of the tubular body 100, the tubular body 100 may be configured to include a first tubular portion 200 and a second tubular portion 300, the gas mixing passage 310 may be disposed in the second tubular portion 300, and the gas passage 210, the premixing passage 230, and the air passage 220 may be disposed in the first tubular portion 200, such that the first tubular portion 200 and the second tubular portion 300 may be fixedly coupled after being formed, respectively, to form the tubular body 100.

The first pipe portion 200 and the second pipe portion 300 may be detachably coupled, which makes the pipe body 100 easy to maintain. Specifically, the inner wall of one end of the first pipe portion 200 may be provided with an internal thread, the outer wall of one end of the second pipe portion 300 may be provided with an external thread, and the internal thread is matched with the external thread, so that one end of the first pipe portion 200 is sleeved with one end of the second pipe portion 300.

Of course, first pipe portion 200 and second pipe portion 300 also can adopt fixed connection modes such as welding, so set up can make the connected effect of first pipe portion 200 and second pipe portion 300 more stable and reliable to promote the gas tightness of body 100.

In some embodiments, the gas channel 210 may also adopt a tapered structure, and specifically, the inner diameter of the gas channel 210 may be gradually reduced in the direction from the gas inlet 110 to the premixing channel 230, so that the gas entering the gas channel 210 may also be accelerated through the gas channel 210, so that the gas may enter the premixing channel 230 more quickly.

Example two

Based on above gas nozzle, this application embodiment has still provided a gas-cooker, includes above gas nozzle. The gas nozzle can be communicated with a burner of a gas stove. Specifically, the gas stove has an air inlet, the tube body 100 has an air mixing and discharging end 312, the air mixing and discharging end 312 is located at the end of the air mixing channel 310 in the tube body 100, the air mixing and discharging end 312 on the tube body 100 is communicated with the air inlet of the gas stove, and the gas inlet 110 on the tube body 100 is communicated with the gas pipe. The gas pipe inputs gas into the gas channel 210 through the gas inlet 110, and air into the air channel 220 through the air inlet 120, and both the gas channel 210 and the air channel 220 are connected with the premixing channel 230, so that the gas and the air are mixed in the premixing channel 230, and then the mixed gas enters into the burner of the gas stove through the gas mixing channel 310, and the ignition device in the gas stove can ignite the mixed gas, so that the mixed gas is combusted.

The outer wall of the gas mixing outlet end 312 of the pipe body 100 may be provided with external threads, and the gas inlet of the gas range may be provided with internal threads, so that the pipe body 100 may be fixedly installed on the gas range.

In the description of the specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means 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 invention. In this specification, the schematic representations of the terms used above are not necessarily intended to 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. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Claims (10)

1. A gas nozzle, characterized in that it comprises a tubular body (100),

the gas mixing device is characterized in that a gas channel (210), an air channel (220), a premixing channel (230) and a gas mixing channel (310) are arranged in the pipe body (100), a gas inlet (110) communicated with the gas channel (210) and an air inlet (120) communicated with the air channel (220) are formed in the surface of the pipe body (100),

the gas channel (210) and the air channel (220) are communicated with the gas mixing channel (310) through the premixing channel (230), and the air channel (220) is in transition connection with the inner wall of the premixing channel (230).

2. Gas nozzle according to claim 1, wherein the air channel (220) and the premixing channel (230) are provided with a transition section (240), the transition section (240) being bent or curved towards the extension of the premixing channel (230).

3. The gas nozzle of claim 2, wherein the inner wall of the transition section (240) is at least one of a slope, a camber, a multi-segment slope, and a multi-segment camber.

4. The gas nozzle according to claim 1, characterized in that the gas channel (210), the premixing channel (230) and the gas mixing channel (310) penetrate the tube (100) in the axial direction of the tube (100), the air inlet (120) opens into a side wall of the tube (100), and the air channel (220) extends from the side wall of the tube (100) to communicate with the premixing channel (230).

5. Gas nozzle according to claim 4, characterized in that the axial direction of the air passage (220) is co-directional with the radial direction of the tube body (100).

6. The gas nozzle of claim 1, wherein the gas mixing channel (310) has opposite gas mixing inlet end (311) and gas mixing outlet end (312), the gas mixing inlet end (311) is communicated with the premixing channel (230), and the inner diameter of the gas mixing channel (310) is gradually reduced in the direction from the gas mixing inlet end (311) to the gas mixing outlet end (312).

7. The gas nozzle according to claim 1, characterized in that said air intake (120) is a plurality of air intake (120), said plurality of air intake (120) being distributed along the circumference of said tubular body (100).

8. The gas nozzle according to claim 1, wherein said tube (100) comprises a first tube portion (200) and a second tube portion (300), said first tube portion (200) being detachably connected to said second tube portion (300), said gas mixing channel (310) being provided in said second tube portion (300), said gas channel (210), said air channel (220) and said premixing channel (230) being provided in said first tube portion (200).

9. Gas nozzle according to claim 1, wherein the inner diameter of the gas channel (210) is gradually decreasing in the direction of the gas inlet (110) to the premixing channel (230).

10. A gas burner comprising a gas nozzle according to any one of claims 1 to 9.

Images