Uniform flow base and combustor comprising same

Abstract

The utility model provides a flow uniformizing base and a burner including the same, the flow uniformizing base comprises an inner ring channel and an outer ring channel, the outer ring channel is communicated with an outer ring gas mixing chamber, the inner ring channel is communicated with an inner ring gas mixing chamber, the outer ring gas mixing chamber is sleeved on the peripheral side of the inner ring gas mixing chamber, and a first magnetic pole and a second magnetic pole are arranged in the outer ring gas mixing chamber. The first magnetic pole is arranged on the side wall, facing the inner ring gas mixing chamber, of the outer ring gas mixing chamber, the second magnetic pole is arranged on the side wall, facing the outer ring gas mixing chamber, of the inner ring gas mixing chamber, the magnetism of the first magnetic pole is opposite to that of the second magnetic pole, and the first magnetic pole is arranged away from a gas inlet of the outer ring channel. And the mixed gas is attracted through the magnetic field, so that the flow rate of the gas entering the outer ring gas mixing chamber is increased. On the basis, the magnetic field is arranged far away from the fuel gas inlet of the outer ring channel so as to attract the fuel gas at the thin fuel gas position, so that the fuel gas amount at each position in the outer ring gas mixing chamber is kept sufficient and uniform.

Description

Technical Field

[0001] The utility model relates to the technical field of burners, in particular to a uniform flow base and a burner comprising the same. Background Art

[0002] As the first choice for home users to cook, the uniformity of the burner's firepower has always been the focus of attention.

[0003] The main factors affecting the uniformity of the burner's firepower are the fire cover and the base. In the prior art, there are many improvements on the uniformity of the firepower of the fire cover, but less attention is paid to the uniformity of the gas flow in the base. The base usually has an inner ring channel and an outer ring channel. The gas inlets of the inner ring channel and the outer ring channel are set on the same side of the base. The gas entering the mixing chamber from the outer ring channel needs to flow around the axial direction of the base for one circle, so as to flow out at various positions of the mixing chamber and enter the outer ring fire cover, and away from the gas inlet of the outer ring channel, for example, when the gas needs to flow around the axial direction of the base for one circle, the amount of gas at the tail end is significantly lower than the amount of gas at the gas inlet, that is, the amount of gas at different positions after entering the outer ring fire cover is uneven. At present, in order to solve the above problems, a guide structure is usually set at the connection between the outer ring channel and the mixing chamber to guide the gas to the end far away from the gas inlet. However, the setting of the guide structure will reduce the gas flow rate entering the outer ring channel accordingly, and the setting of the guide structure has limited improvement on the uniformity of the gas, and there is still a situation where the gas amount is low in the outer ring channel far away from the gas inlet. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the defect of poor uniformity of gas distribution in the base in the prior art, and to provide a uniform flow base and a burner comprising the same.

[0005] The utility model solves the above technical problems through the following technical solutions:

[0006] A flow-uniform base, the flow-uniform base comprising an inner ring channel and an outer ring channel, the outer ring channel being connected to an outer ring air mixing chamber, the inner ring channel being connected to the inner ring air mixing chamber and the outer ring air mixing chamber being sleeved on the outer peripheral side of the inner ring air mixing chamber, the outer ring air mixing chamber being provided with a first magnetic pole and a second magnetic pole, the first magnetic pole being provided on a side wall of the outer ring air mixing chamber facing the inner ring air mixing chamber, the second magnetic pole being provided on a side wall of the inner ring air mixing chamber facing the outer ring air mixing chamber, the first magnetic pole and the second magnetic pole having opposite magnetic properties, and the first magnetic pole being provided away from the gas inlet of the outer ring channel.

[0007] In this solution, a first magnetic pole and a second magnetic pole are provided to form a magnetic field in the outer ring gas mixing chamber. The magnetic field attracts the fluid entering the outer ring gas mixing chamber, such as paramagnetic air, and causes it to flow toward the magnetic field. The fluid entering the outer ring gas mixing chamber through the outer ring channel includes not only gas but also air, that is, a mixture of air and gas. The magnetic field attracts the mixture, thereby increasing the gas flow rate entering the outer ring gas mixing chamber. On this basis, the magnetic field is arranged away from the gas inlet of the outer ring channel to attract the gas at the place where the gas is thin, so that the amount of gas at each position in the outer ring gas mixing chamber remains sufficient and uniform. After the gas enters the outer ring fire cover, the uniformity of the fire power of the fire holes at each position of the outer ring fire cover is improved, thereby enhancing the user experience.

[0008] Preferably, the first magnetic pole extends in a fan-shaped direction and is attached to the side wall of the outer ring mixing chamber facing the inner ring mixing chamber, one end of the first magnetic pole is arranged on the side of the gas inlet of the outer ring channel, and the other end of the first magnetic pole is arranged away from the gas inlet of the outer ring channel.

[0009] In the present solution, one end of the first magnetic pole is arranged on the side of the gas inlet of the outer ring channel, and the other end of the first magnetic pole is arranged away from the gas inlet of the outer ring channel to form a magnetic field away from the gas inlet of the outer ring channel. Compared with the position close to the gas inlet of the outer ring channel, the distant arrangement can further attract the gas to the area where the gas amount is originally thin, so as to improve the uniformity of the gas.

[0010] Preferably, the sector angle of the first magnetic pole is 180°.

[0011] In this solution, the above-mentioned arrangement is used to increase the effective area of ​​the magnetic field in the outer ring gas mixing chamber, further enhance the ability to attract the mixed gas of air and fuel gas, and enhance the uniformity of the fuel gas.

[0012] Preferably, the second magnetic pole ring is arranged on the side wall of the inner ring mixing chamber facing the outer ring mixing chamber, the second magnetic pole includes a first section and a second section, the first section is arranged corresponding to the first magnetic pole, and the second section is located below the first section and connected to the first section.

[0013] In this solution, a first section is provided on the outer wall of the inner ring gas mixing chamber to form a magnetic field corresponding to the first magnetic pole, thereby avoiding the situation where the magnetic field cannot be formed due to the absence of the second magnetic pole at the location of the first magnetic pole.

[0014] Preferably, the second section is arranged obliquely outwardly away from the first section.

[0015] In this solution, by setting the second section and locating it below the first section, the inclined second section can play a guiding role and guide the mixed gas to the magnetic field, so as to reduce the response time of the increased flow velocity of the mixed gas entering the outer ring mixing chamber and improve the efficiency of uniform distribution of the gas.

[0016] Preferably, the gas inlet of the inner ring channel and the gas inlet of the outer ring channel are respectively arranged on both sides of the axis of the flow uniforming base.

[0017] In this solution, the gas inlet of the inner ring channel is arranged on the other side of the axis of the flow equalizer base away from the gas inlet of the outer ring mixing chamber to reduce the space occupied by the flow equalizer base in the horizontal direction, so that the size of the flow equalizer base can be further reduced. After the reduction, the flow path of the mixed gas is reduced accordingly, thereby improving the mixing efficiency and mixing uniformity.

[0018] Preferably, the inner annular gas mixing chamber is arranged in a vertical direction, and a side wall of the gas inlet of the inner annular channel is tangent to a side wall of the inner annular gas mixing chamber.

[0019] In this solution, the above arrangement is used to reduce the flow resistance of the mixed gas entering the inner ring channel.

[0020] Preferably, a contraction section is provided in the inner ring gas mixing chamber, and the contraction section is provided between the gas inlet of the inner ring channel and the outlet of the inner ring gas mixing chamber.

[0021] In this solution, a contraction section is provided to enhance the mixing effect.

[0022] Preferably, the flow-uniform base further includes a cover plate, which is disposed on the outer ring mixing chamber, and the cover plate is provided with an outlet, which is located on the outer peripheral side of the inner ring mixing chamber and the axis of the outlet coincides with the axis of the inner ring mixing chamber.

[0023] In this solution, through the above-mentioned arrangement, the mixed gas can be merged to the axis of the flow-uniform base, increasing the flow path of the mixed gas, further mixing and homogenizing the flow, and improving the problem of uneven circumferential distribution of the mixed gas.

[0024] A burner comprises the flow-uniform base as described above.

[0025] In this solution, the burner includes the above-mentioned uniform flow base, so that the inner ring fire cover and the outer ring fire cover of the burner receive a more uniform mixed gas, making the fire power distribution more uniform.

[0026] The positive and progressive effect of the utility model is that the utility model forms a magnetic field in the outer ring gas mixing chamber by setting a first magnetic pole and a second magnetic pole. The magnetic field attracts the fluid entering the outer ring gas mixing chamber, such as air with paramagnetism, and flows toward the magnetic field. The fluid entering the outer ring gas mixing chamber through the outer ring channel includes not only gas but also air, that is, a mixture of air and gas. The magnetic field attracts the mixed gas, thereby increasing the gas flow rate entering the outer ring gas mixing chamber. On this basis, the magnetic field is set away from the gas inlet of the outer ring channel to attract the gas at the gas-thin part, so that the gas volume at each position of the outer ring gas mixing chamber remains sufficient and uniform. After the gas enters the outer ring fire cover, the uniformity of the firepower of the fire holes at each position of the outer ring fire cover is improved, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a three-dimensional diagram of a flow-uniform base according to a preferred embodiment of the utility model.

[0028] Figure 2 The top view of a flow-uniform base according to a preferred embodiment of the utility model is shown in FIG.

[0029] Figure 3 It is a three-dimensional diagram of a first magnetic pole of a preferred embodiment of the utility model.

[0030] Figure 4 It is a three-dimensional diagram of the second magnetic pole of a preferred embodiment of the utility model.

[0031] Figure 5 This is a positional relationship diagram of the inner ring channel gas inlet and the outer ring channel gas inlet of a preferred embodiment of the utility model.

[0032] Description of reference numerals:

[0033] Flow balancing base 1

[0034] Inner Ring Channel 11

[0035] Outer Ring Channel 12

[0036] Outer ring mixing chamber 2

[0037] The first magnetic pole 21

[0038] The second magnetic pole 22

[0039] First paragraph 221

[0040] 222

[0041] Inner ring mixing chamber 3

[0042] Contraction section 31

[0043] Cover 4

[0044] Exit 41 DETAILED DESCRIPTION

[0045] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0046] This embodiment provides a flow-uniform base 1, the specific structure of which is as follows: Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the uniform flow base 1 includes an inner ring channel 11 and an outer ring channel 12, the outer ring channel 12 is connected to the outer ring mixing chamber 2, the inner ring channel 11 is connected to the inner ring mixing chamber 3 and the outer ring mixing chamber 2 is sleeved on the outer peripheral side of the inner ring mixing chamber 3, and a first magnetic pole 21 and a second magnetic pole 22 are arranged in the outer ring mixing chamber 2, the first magnetic pole 21 is arranged on the side wall of the outer ring mixing chamber 2 facing the inner ring mixing chamber 3, and the second magnetic pole 22 is arranged on the side wall of the inner ring mixing chamber 3 facing the outer ring mixing chamber 2, the magnetic properties of the first magnetic pole 21 and the second magnetic pole 22 are opposite, and the first magnetic pole 21 is arranged away from the gas inlet of the outer ring channel 12.

[0047] Specifically, the inner ring channel 11 and the outer ring channel 12 are arranged in parallel at the bottom of the uniform flow base 1, the outer ring gas mixing chamber 2 is a circular ring structure and has a space for accommodating a mixed gas of gas and air inside, and the inner ring gas mixing chamber 3 is arranged at the axis of the circular ring structure, and the inner ring gas mixing chamber 3 is a cylindrical structure and has a space for accommodating a mixed gas inside. The first magnetic pole 21 is arranged on the inner wall of the outer ring gas mixing chamber 2, and the second magnetic pole is arranged on the outer wall of the inner ring gas mixing chamber 3, and is arranged relative to form a magnetic field. In this embodiment, the first magnetic pole 21 is an N pole and the second magnetic pole 22 is an S pole. As an example, it is not limited to this, and a magnetic field can also be formed on the basis of the exchange of magnetic poles. Because air is a paramagnetic gas, when the mixed gas with air enters the outer ring gas mixing chamber 2 through the gas inlet of the outer ring channel 12, it is attracted by the magnetic field, so that the flow rate of the mixed gas increases, and it can further flow into a position far away from the gas inlet, so as to solve the problem that the gas volume is thin away from the gas inlet and the gas distribution in the outer ring gas mixing chamber is uneven. The attraction of the magnetic field to the paramagnetic air belongs to the thermomagnetic convection in the prior art, which will not be elaborated here.

[0048] Furthermore, the first magnetic pole 21 is arranged away from the gas inlet of the outer ring channel 12 to attract the gas at the place where the gas is rarefied, so that the gas stroke entering the outer ring gas mixing chamber 2 is increased, and during the flow of the mixed gas, the air and the gas can be fully mixed to improve the mixing uniformity of the mixed gas by the uniform flow base 1. In addition, the amount of gas at each position in the outer ring gas mixing chamber 2 is kept sufficient and uniform. After the gas enters the outer ring fire cover, the uniformity of the fire power of the fire holes at each position of the outer ring fire cover is improved, thereby improving the user experience.

[0049] In addition, the first magnetic pole 21 and the second magnetic pole 22 are respectively arranged on the side walls of the outer ring mixing chamber 2 and the inner ring mixing chamber 3. The outer ring mixing chamber 2 and the inner ring mixing chamber 3 accommodate the middle area of ​​the mixed gas, so they will not block and guide the mixed gas, thereby ensuring that the flow rate of the mixed gas will not be reduced.

[0050] In this embodiment, the first magnetic pole 21 extends in a fan-shaped direction and is attached to the side wall of the outer ring mixing chamber 2 facing the inner ring mixing chamber 3. One end of the first magnetic pole 21 is arranged on the side of the gas inlet of the outer ring channel 12, and the other end of the first magnetic pole 21 is arranged away from the gas inlet of the outer ring channel 12.

[0051] Specifically, the first magnetic pole 21 is an arc-shaped structure with a flat surface. On the basis of being far away from the gas inlet of the outer ring channel 12, one end of the first magnetic pole 21 is located at the side of the gas inlet, that is, the mixed gas enters the outer ring gas mixing chamber 2 and circles around it and returns to the side of the gas inlet. The other end of the first magnetic pole 21 is set away from the gas inlet, that is, the first magnetic pole 21 is not set on the side close to the outer ring channel 12 in the circular structure, and the first magnetic pole 21 is set on the side of the circular structure away from the outer ring channel 12. This further reduces the size of the first magnetic pole 21, reduces the cost of the uniform flow base 1, and the mixed gas flow rate on the side close to the gas inlet of the outer ring channel 12 can meet the uniformity requirements. At the same time, a magnetic field is formed at the gas inlet far away from the outer ring channel 12. Compared with the gas inlet near the outer ring channel 12, the gas inlet far away from the outer ring channel 12 can further attract the gas to the area where the gas volume is originally thin, so as to improve the uniformity of the gas.

[0052] In this embodiment, the sector angle of the first magnetic pole 21 is 180°.

[0053] Specifically, the sector angle formed by the line connecting the two ends of the first magnetic pole 21 is 180°. On the basis that one end of the first magnetic pole 21 is located on the side of the gas inlet of the outer ring channel 12, the other end of the first magnetic pole 21 set at 180° is located in the outer ring mixing chamber 2 farthest from the gas inlet of the outer ring channel 12, thereby increasing the effective area of ​​the magnetic field in the outer ring mixing chamber 2, further improving the ability to attract the mixed gas of air and gas, and improving the uniformity of the gas.

[0054] In this embodiment, the second magnetic pole 22 is arranged on the side wall of the inner ring mixing chamber 3 facing the outer ring mixing chamber 2, and the second magnetic pole 22 includes a first section 221 and a second section 222. The first section 221 is arranged corresponding to the first magnetic pole 21, and the second section 222 is located below the first section 221 and connected to the first section 221.

[0055] Specifically, the first section 221 and the second section 222 are both annular structures and are sleeved on the outer wall of the inner ring gas mixing chamber 3. The first section 221 is arranged corresponding to the first magnetic pole 21 to form a magnetic field, so as to avoid the situation where the magnetic field cannot be formed due to the absence of the second magnetic pole 22 at the location of the first magnetic pole 21. In this embodiment, the first section 221 and the second section 222 are integrally formed and arranged. Of course, in other embodiments, they can also be separately arranged. This is a prior art and will not be described in detail here.

[0056] In this embodiment, the second section 222 is disposed obliquely outward away from the first section 221 .

[0057] Specifically, the inner ring mixing chamber 3 is arranged at the axis of the uniform flow base 1 in the vertical direction, and the outer wall of the inner ring mixing chamber 3 extending into the outer ring mixing chamber 2 is provided with an outer wall extending from the outer ring mixing chamber 2 inclined in the vertical direction, and the second section 222 is attached to the outer wall and is located below the first section 221. After the mixed gas enters the outer ring mixing chamber 2, it is guided by the second section 222 and directed into the magnetic field formed by the first section 221 and the first magnetic pole 21, so as to reduce the response time of the increased flow velocity of the mixed gas entering the outer ring mixing chamber 2 and improve the efficiency of uniform distribution of the gas.

[0058] like Figure 5 As shown, in this embodiment, the gas inlet of the inner ring channel 11 and the gas inlet of the outer ring channel 12 are respectively arranged on both sides of the axis of the flow uniforming base 1.

[0059] Specifically, the axis of the flow uniforming base 1 is located between the gas inlet of the inner ring channel 11 and the gas inlet of the outer ring channel 12. Compared with the scheme in which the axis of the gas inlet of the inner ring channel 11 coincides with the axis of the flow uniforming base 1, the gas inlet of the inner ring channel 11 is further away from the gas inlet of the outer ring channel 12, so as to reasonably utilize the bottom space of the flow uniforming base 1, so that the overall structural size of the flow uniforming base 1 is no longer limited by the coincidence of the axis of the gas inlet of the inner ring channel 11 with the axis of the flow uniforming base 1 and the gas inlet of the inner ring channel 11 and the gas inlet of the outer ring channel 12 are located on the same side of the flow uniforming base 1, which enables the overall structural size of the flow uniforming base 1 to be further reduced, and the flow path of the mixed gas is reduced accordingly after the reduction, so as to improve the mixing efficiency and the uniformity of the mixing.

[0060] In this embodiment, the inner annular gas mixing chamber 3 is arranged in the vertical direction, and the side wall of the gas inlet of the inner annular channel 11 is tangent to the side wall of the inner annular gas mixing chamber 3 .

[0061] Specifically, the gas inlet of the inner ring channel 11 is located on the side of the axis of the uniform flow base 1 far away from the gas inlet of the outer ring channel 12, that is, the gas inlet of the inner ring channel 11 is eccentrically arranged relative to the axis of the uniform flow base 1. On this basis, the side wall of the gas inlet of the inner ring channel 11 far away from the outer ring channel 12 is tangent to the side wall of the inner ring gas mixing chamber 3, so as to avoid the situation where the mixed gas in the eccentrically arranged gas inlet of the inner ring channel 11 decreases in the connection with the inner ring gas mixing chamber 3 when entering the inner ring gas mixing chamber 3 and the flow resistance increases, that is, the bottom space of the uniform flow base 1 is reasonably utilized while avoiding the increase of the flow resistance when the mixed gas in the inner ring channel 11 enters.

[0062] In this embodiment, a contraction section 31 is provided in the inner annular gas mixing chamber 3 , and the contraction section 31 is provided between the gas inlet of the inner annular channel 11 and the outlet of the inner annular gas mixing chamber 3 .

[0063] Specifically, the contraction section 31 is a cavity structure with a larger end and a smaller end in the prior art. The smaller end of the contraction section 31 is far away from the gas inlet of the inner ring channel 11, while the larger end of the contraction section 31 is arranged close to the gas inlet of the inner ring channel 11. The contraction section 31 is arranged to fully mix the mixed gas in the inner ring gas mixing chamber 3, thereby improving the uniformity of the mixed gas in the inner ring gas mixing chamber 3.

[0064] In this embodiment, the uniform flow base 1 also includes a cover plate 4, which is covered on the outer ring gas mixing chamber 2. The cover plate 4 is provided with an outlet 41, which is located on the outer peripheral side of the inner ring gas mixing chamber 3 and the axis of the outlet 41 coincides with the axis of the inner ring gas mixing chamber 3.

[0065] Specifically, the cover plate 4 is a circular ring structure and an outlet 41 is formed at the axis. The cover plate 4 is arranged at the top of the outer ring mixing chamber 2 and is connected to the uniform flow base 1 through a bolt assembly. It can be understood that the size of the outlet 41 is larger than the diameter of the inner ring mixing chamber 3 and the outlet of the inner ring mixing chamber 3 is located at the axis of the outlet 41 after the cover plate 4 is screwed to the uniform flow base 1. By setting the cover plate 4 and setting the outlet 41 in the middle area of ​​the uniform flow base 1, when the mixed gas enters the outer ring mixing chamber 2 and flows out, it will not flow out directly in the vertical direction, but will first contact the bottom of the cover plate 4 and detour to the outlet 41 in the horizontal direction, that is, the mixed gas will merge to the axis of the uniform flow base 1, thereby increasing the circumferential stroke of the mixed gas, further mixing and uniform flow, and improving the problem of uneven circumferential distribution of the mixed gas.

[0066] This embodiment also provides a burner, which includes the above-mentioned uniform flow base 1.

[0067] Specifically, the burner includes a uniform flow base 1, an inner ring fire cover and an outer ring fire cover. The inner ring fire cover and the outer ring fire cover are respectively covered at the outlets of the inner ring mixing chamber 3 and the outer ring mixing chamber 2. A first magnetic pole 21 and a second magnetic pole 22 are arranged in the outer ring mixing chamber 2 to attract the mixed gas and increase the flow rate of the mixed gas, so that the inner ring fire cover and the outer ring fire cover of the burner receive a more uniform mixed gas, making the fire power distribution more uniform.

[0068] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A flow-uniform base, comprising an inner ring channel and an outer ring channel, wherein the outer ring channel is connected to the outer ring gas mixing chamber, the inner ring channel is connected to the inner ring gas mixing chamber, and the outer ring gas mixing chamber is sleeved on the outer peripheral side of the inner ring gas mixing chamber, characterized in that: A first magnetic pole and a second magnetic pole are arranged in the outer ring air mixing chamber, the first magnetic pole is arranged on the side wall of the outer ring air mixing chamber facing the inner ring air mixing chamber, and the second magnetic pole is arranged on the side wall of the inner ring air mixing chamber facing the outer ring air mixing chamber, the magnetic properties of the first magnetic pole and the second magnetic pole are opposite, and the first magnetic pole is arranged away from the gas inlet of the outer ring channel.

2. The flow-uniform base according to claim 1, characterized in that: The first magnetic pole extends in a fan-shaped direction and is attached to the side wall of the outer ring mixing chamber facing the inner ring mixing chamber. One end of the first magnetic pole is arranged on the side of the gas inlet of the outer ring channel, and the other end of the first magnetic pole is arranged away from the gas inlet of the outer ring channel.

3. The flow-uniform base according to claim 2, characterized in that: The sector angle of the first magnetic pole is 180°.

4. The flow-uniform base according to claim 1, characterized in that: The second magnetic pole ring is arranged on the side wall of the inner ring gas mixing chamber facing the outer ring gas mixing chamber, and the second magnetic pole includes a first section and a second section, the first section is arranged corresponding to the first magnetic pole, and the second section is located below the first section and connected to the first section.

5. The flow-uniform base according to claim 4, characterized in that: The second section is arranged obliquely outwardly away from the first section.

6. The flow-uniform base according to claim 1, characterized in that: The gas inlet of the inner ring channel and the gas inlet of the outer ring channel are respectively arranged on both sides of the axis of the flow-uniform base.

7. The flow-uniform base according to claim 6, characterized in that: The inner ring gas mixing chamber is arranged along the vertical direction, and the side wall of the gas inlet of the inner ring channel is tangent to the side wall of the inner ring gas mixing chamber.

8. The flow-uniform base according to claim 1 or 7, characterized in that: The inner ring gas mixing chamber is provided with a contraction section, and the contraction section is provided between the gas inlet of the inner ring channel and the outlet of the inner ring gas mixing chamber.

9. The flow-uniform base according to claim 1, characterized in that: The flow-uniform base further includes a cover plate, which is disposed on the outer ring gas mixing chamber. The cover plate is provided with an outlet, which is located on the outer peripheral side of the inner ring gas mixing chamber and the axis of the outlet coincides with the axis of the inner ring gas mixing chamber.

10. A burner, characterized in that: The burner comprises a flow-uniform base as claimed in any one of claims 1 to 9.

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