Burner and gas hob comprising same

Abstract

The application discloses a burner and a gas stove comprising the same. The burner has a first combustion part and a second combustion part. A first mixed gas cavity corresponding to the first combustion part and a second mixed gas cavity corresponding to the second combustion part are arranged in a base. The first mixed gas cavity and the second mixed gas cavity are arranged along the circumferential direction of the burner in the base. A first extension channel is arranged at the end of the second mixed gas cavity along the gas flow direction. The first extension channel extends to one side of the base for arranging the first mixed gas cavity and is located above the first mixed gas cavity. By arranging the first mixed gas cavity of the first combustion part and the second mixed gas cavity of the second combustion part along the circumferential direction of the burner in the base, the internal space of the base is reasonably utilized. The contradiction between sufficient flow channel space and the occupied volume of the base caused by the concentric arrangement of various mixed gas cavities in the base in the prior art is avoided. The volume of the base can be reduced, and the heat loss is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cookers, in particular to a burner and a gas stove comprising the same. BACKGROUND

[0002] At present, the multi-channel multi-ring fire burner gradually becomes an important branch in household gas stoves because of its strong fire control ability, various flame layout types and other advantages.

[0003] Taking a three-ring fire burner as an example, a relatively independent inner ring channel, a middle ring channel and an outer ring channel are usually arranged in the base, the inner ring channel, the middle ring channel and the outer ring channel are concentrically arranged, and are arranged in the radial direction of the burner from inside to outside in sequence, each gas channel is communicated to the corresponding combustion part of the upper fire cover to supply gas to the inner ring combustion part, the middle ring combustion part and the outer ring combustion part. In order to ensure that each gas channel has enough space for pressure stabilization, flow stabilization and gas mixing, the concentric arrangement of the gas channel will cause the overall size of the base of the burner to be large, thereby causing the entire burner to be large in volume and not compact, and the contact area between the base and the external air is large, which causes the heat generated by the burner to be large in degree of outward dissipation. SUMMARY

[0004] The technical problem to be solved by the present application is to overcome the defects of the prior art that the burner is large in volume, not compact, and the heat generated by the burner is large in degree of outward dissipation through the base, and to provide a burner and a gas stove comprising the same.

[0005] The present application solves the above technical problems by the following technical solutions:

[0006] A burner, the burner has a first combustion part and a second combustion part, characterized in that a first gas mixing cavity corresponding to the first combustion part and a second gas mixing cavity corresponding to the second combustion part are arranged in the base, and the first gas mixing cavity and the second gas mixing cavity are arranged in the circumferential direction of the burner in the base.

[0007] A first extension channel is arranged at the end of the second gas mixing cavity, the first extension channel extends to one side of the base for arranging the first gas mixing cavity and is located above the first gas mixing cavity.

[0008] The burner, by arranging the first gas mixing cavity of the first combustion part and the second gas mixing cavity of the second combustion part in the base along the circumferential direction of the burner, reasonably utilizes the internal space of the base, avoids the contradiction between sufficient flow channel space and the volume occupied by the base caused by the concentric arrangement of each gas mixing cavity in the base in the prior art, reduces the volume of the base, and reduces heat loss.

[0009] Meanwhile, in order to ensure the coverage of each mixing chamber in the circumferential direction of the base and further ensure the uniformity of the gas in the circumferential direction of each combustion part, the first extension channel is arranged at the end of the second mixing chamber and extends to one side of the first mixing chamber, so as to meet the uniformity requirement of the gas in the circumferential direction of each combustion part.

[0010] Further, compared with the prior art scheme of arranging two mixing chambers separately, the scheme of arranging the first extension channel to extend to one side of another mixing chamber can reduce the flow resistance, ensure the smoothness of the gas flow, and realize effective shunting of the multi-path gas flow under a smaller base diameter.

[0011] Preferably, along the axial direction of the burner, the overlapping part of the first extension channel and the first mixing chamber is at least partially located at the circumferential side edge of the base.

[0012] The structural arrangement scheme can reasonably utilize the internal space of the base, so that the first mixing chamber can be arranged at the circumferential side edge of the base along the circumferential direction of the burner, so as to ensure the extension length of the first mixing chamber, and so that the flow path of the gas in the first mixing chamber can be as long as possible.

[0013] Preferably, the burner further comprises a first suction pipe and a second suction pipe, the ends of the first suction pipe and the second suction pipe are connected to the base along the gas flow direction, the first suction pipe is in communication with the first mixing chamber, and the second suction pipe is in communication with the second mixing chamber.

[0014] The end of the first suction pipe and the end of the first mixing chamber along the circumferential direction of the burner are in communication with each other, and / or the end of the first suction pipe and the end of the second mixing chamber along the circumferential direction of the burner are in communication with each other.

[0015] When the first mixing chamber and the second mixing chamber are arranged in the base along the circumferential direction of the burner, the first mixing chamber and the second mixing chamber do not form a ring-shaped channel in the base, but a C-shaped channel extending along the circumferential direction. By further connecting the first suction pipe to one end of the first mixing chamber along the circumferential direction and connecting the second suction pipe to one end of the second mixing chamber along the circumferential direction, compared with the prior art scheme of connecting the suction pipe to the ring-shaped mixing chamber channel, the influence of the invalid space in the mixing chamber is reduced.

[0016] Specifically, the invalid space in the mixing chamber refers to the end position of the ring-shaped mixing chamber. When the gas is delivered to the ring-shaped mixing chamber through the suction pipe, the gas flow rate and pressure gradually decrease in the ring-shaped mixing chamber, and finally form a vortex at the end of the ring-shaped channel, which affects the normal gas delivery of the suction pipe; meanwhile, when the burner is closed, the relatively slow gas remains in the invalid space, which is prone to backfire and abnormal noise.

[0017] In the present application, the first ejector pipe is connected to the end of the first mixing chamber along the circumferential direction of the burner, and the second ejector pipe is connected to the end of the second mixing chamber along the circumferential direction of the burner, so that the fuel gas is sent into the C-shaped channel of the first mixing chamber and the second mixing chamber, respectively. This avoids the formation of vortex flow due to the slow flow rate of the fuel gas at the end of the annular channel, and avoids the occurrence of deflagration due to the residual fuel gas at the end. The problem of "ineffective space" in the annular mixing chamber is solved, the waste of space inside the base is avoided, and the space inside the base is utilized reasonably.

[0018] Preferably, the first ejector pipe and the second ejector pipe are located on the same side of the base.

[0019] By arranging the first ejector pipe and the second ejector pipe on the same side of the base, the layout and installation of the ejector pipes are facilitated, and the waste of space near the base is reduced, making the processing and manufacturing easier.

[0020] Preferably, the burner further comprises a fire cover arranged above the base, and the first combustion part and the second combustion part are arranged in the fire cover.

[0021] In the axial direction of the burner, the first combustion part and the first mixing chamber are connected through a first gas distribution port, and the second combustion part and the second mixing chamber are connected through a second gas distribution port. At least part of the first gas distribution port and the second gas distribution port are arranged along the circumferential direction of the burner.

[0022] By arranging the first gas distribution port corresponding to the first combustion part and the second gas distribution port corresponding to the second combustion part along the circumferential direction, the principle that the circumference is greater than the inner circumference under the same area is utilized, so that the outlet area of the circumferential region of the burner can achieve relatively larger utilization, the space utilization of the gas distribution port is maximized by such arrangement, the space occupied by the gas distribution port in the circumferential direction is reduced, and the region not occupied by the gas distribution port can be used for the arrangement of the secondary air channel of the burner, so as to improve the secondary air supplement effect of the burner. In addition, the corresponding first gas distribution port and second gas distribution port are arranged along the circumferential direction, avoiding occupying the central region of the base, so that the central region of the base can reserve corresponding space for installing flame detection devices and other detection accessories and sensors.

[0023] Meanwhile, the circumferential arrangement between the first gas distribution port and the second gas distribution port has a smaller circumference than the radial arrangement of the two, and therefore, in the case that the flow resistance of the gas flowing through the gas distribution port is proportional to the circumference of the gas distribution port, the circumferential arrangement has a smaller flow resistance of the gas flowing through the gas distribution port, ensuring the smoothness of the gas flow. In addition, the circumferential arrangement has better integrity than the radial arrangement, so that the structural strength of each component of the combustor is better.

[0024] Therefore, the arrangement scheme increases the space for arranging the secondary air passage in the combustor by adjusting the arrangement position of the gas distribution port corresponding to two rings in the combustion part, and at the same time, the gas distribution port has a smaller flow resistance of the gas flowing through the gas distribution port, so that the heat load of the combustor is improved.

[0025] Preferably, at least one of the second gas distribution ports partially overlaps with the first extension passage in the axial direction of the combustor.

[0026] The arrangement scheme can reduce the flow resistance of the gas flowing from the second gas distribution port to the corresponding mixing chamber in the second mixing chamber, and effectively utilize the internal space of the base to realize reasonable distribution and arrangement of the gas flow path.

[0027] Preferably, the cross-sectional area ratio of the first gas distribution port to the gas inlet of the first mixing chamber is in the range of 2.5:1 to 4:1.

[0028] And / or, the cross-sectional area ratio of the second gas distribution port to the gas inlet of the second mixing chamber is in the range of 2.5:1 to 4:1.

[0029] By arranging the first gas distribution port and the second gas distribution port in the circumferential direction of the combustor, the space on the circumference of the combustor can be fully utilized, so that the area of the gas outlet can be increased, and the gas flow resistance can be reduced to effectively control the flow rate of the gas after entering the fire cover.

[0030] Preferably, the combustor further comprises a gas distribution disc, the first gas distribution port and the second gas distribution port are formed on the gas distribution disc, and the base, the gas distribution disc and the fire cover are arranged in a top-down direction.

[0031] The first mixing chamber is surrounded by the base and the gas distribution disc; and / or,

[0032] The second mixing chamber is surrounded by the base and the gas distribution disc.

[0033] The structure arrangement scheme forms the first mixing chamber and the second mixing chamber through the combination of the base and the gas distribution disc, achieves the purpose of simplifying the structure of the burner, and facilitates the cleaning and maintenance of the interiors of the first mixing chamber and the second mixing chamber.

[0034] Preferably, the first mixing chamber of the first combustion part is jointly enclosed by the gas distribution disc and the fire cover; and / or,

[0035] The second mixing chamber of the second combustion part is jointly enclosed by the gas distribution disc and the fire cover.

[0036] The structure arrangement scheme forms the first mixing chamber and the second mixing chamber through the combination of the base and the gas distribution disc, achieves the purpose of simplifying the structure of the burner, and facilitates the cleaning and maintenance of the interiors of the first mixing chamber and the second mixing chamber.

[0037] Preferably, along the axial direction of the burner, the secondary air channel of the burner is formed between the base and the fire cover.

[0038] Along the circumferential direction of the burner, the arrangement position of the secondary air channel is defined by the gas distribution disc.

[0039] The structure arrangement scheme defines the arrangement position of the secondary air channel in the circumferential direction by the gas distribution disc, forms the secondary air channel by the other regions of the gas distribution disc except the first gas distribution port and the second gas distribution port, and improves the settable space of the secondary air channel.

[0040] Preferably, along the radial direction of the burner, at least part of the second gas distribution port protrudes from the first gas distribution port, the protruding part of the second gas distribution port extends towards the first gas distribution port along the circumferential direction of the burner, and is arranged adjacent to the first gas distribution port along the radial direction of the burner.

[0041] In the case that the sizes of the two gas distribution ports in the radial direction of the burner are inconsistent, the protruding part of the relatively protruding second gas distribution port extends towards the first gas distribution port, so that the arrangement between the two gas distribution ports is more compact, thereby saving the space occupied by the gas distribution ports.

[0042] Preferably, the first gas distribution port and the second gas distribution port are arranged adjacent to each other.

[0043] The first gas distribution port and the second gas distribution port are arranged adjacent to each other, and the layout is relatively compact, so that the required length of the sealing ring channel when the burner is integrally sealed for the first gas distribution port and the second gas distribution port is relatively smaller, thereby reducing the risk of gas leakage by reducing the length of the sealing ring channel.

[0044] Meanwhile, the first gas outlet and the second gas outlet are arranged compactly, and the space not occupied by the first gas outlet and the second gas outlet in the circumferential direction can be increased, so that the size of the secondary air channel arranged in the unoccupied space can be further improved, thereby improving the secondary air supplement capacity of the burner.

[0045] Preferably, the number of the first gas outlets is multiple, and the multiple first gas outlets are arranged uniformly in a circle with the central axis of the burner as the center.

[0046] Preferably, the number of the second gas outlets is multiple, and the second gas outlets are arranged symmetrically with the central axis of the burner as the center and uniformly in a circle with the central axis of the burner as the center.

[0047] In the case where the number of the gas outlets of the single gas mixing chamber is multiple, the uniformity of the gas entering the corresponding gas mixing chamber through the gas outlet is improved by arranging the gas outlets symmetrically with the central axis of the burner as the center, thereby improving the heating effect of the burner.

[0048] Preferably, the number of the first gas outlets and the number of the second gas outlets are both multiple, and at least one of the first gas outlets and the second gas outlets is arranged in the radial direction of the burner.

[0049] By arranging a part of the first gas outlets and the second gas outlets in the circumferential direction and arranging another part of the first gas outlets and the second gas outlets in the radial direction, the gas passage connection requirements at different positions can be met.

[0050] Preferably, the gas load of the first combustion part is greater than that of the second combustion part.

[0051] In the case where the gas load of the second combustion part is relatively small and the gas load of the first combustion part is relatively large, an extension channel is arranged at the second gas mixing cavity corresponding to the second combustion part, so that the arrangement position of the second gas mixing cavity is relatively higher than that of the first gas mixing cavity, the drop of the second gas mixing cavity from the gas inlet to the gas outlet is relatively smaller than that of the first gas mixing cavity, and the inclination degree of the gas passage of the second gas mixing cavity is relatively gentler, thereby avoiding affecting the gas kinetic energy of the second gas mixing cavity with a relatively small gas load. Therefore, the gas outlet of the gas mixing cavity corresponding to the combustion part with a relatively small gas load is arranged above the gas mixing cavity corresponding to another combustion part.

[0052] Meanwhile, the arrangement position of the second gas mixing cavity is relatively higher than that of the first gas mixing cavity, so that the length of the gas flow passage of the first gas mixing cavity is relatively longer than that of the second gas mixing cavity, and the length of the gas flow passage can be adapted to the large gas load of the first combustion part.

[0053] Preferably, a second extension channel is arranged at the end of the first mixing chamber in the direction of the gas flow, and the second extension channel extends to one side of the second mixing chamber and is above the second mixing chamber.

[0054] To further ensure the coverage of each mixing chamber in the circumferential direction of the base and thus ensure the uniformity of the gas in the circumferential direction of each combustion part, a second extension channel is arranged at the end of the first mixing chamber, and the second extension channel extends to one side of the second mixing chamber to meet the uniformity requirement of the gas in the circumferential direction of each combustion part.

[0055] Preferably, the burner further has an inner ring combustion part, and the first combustion part and the second combustion part are both located outside the inner ring combustion part, and the inner ring mixing chamber corresponding to the inner ring combustion part is arranged at the middle position of the base, and the first mixing chamber and the second mixing chamber are arranged around the inner ring mixing chamber.

[0056] In a multi-ring burner with three or more rings, the first mixing chamber and the second mixing chamber located on the outside are arranged in the circumferential direction to provide sufficient arrangement space for the inner ring mixing chamber in the middle region of the base.

[0057] Preferably, the burner further comprises an inner ring ejector pipe, and the end of the inner ring ejector pipe is connected to the base in the direction of the gas flow, and the inner ring ejector pipe is communicated with the inner ring mixing chamber through a communication channel of the base, and the communication channel is arranged between the first mixing chamber and the second mixing chamber.

[0058] The communication channel of the base for communicating the inner ring ejector pipe to the inner ring mixing chamber is arranged between the first mixing chamber and the second mixing chamber to reasonably utilize the space of the base.

[0059] Preferably, the first extension channel is at least partially above the communication channel, and the height of the channel of the first extension channel above the communication channel is H1, and the total height of the channel of the base is H, and H1≥1 / 3H.

[0060] The first extension channel is arranged above the communication channel occupying part of the space in the base to reasonably utilize the space, so that the first extension channel of the first mixing chamber extends above the second mixing chamber after passing through the upper region of the communication channel. Specifically, by limiting the channel height H1 of the first extension channel above the communication channel, the channel height H1 is at least more than one third of the total channel height H of the base, so as to ensure the smoothness of the gas flow in the first extension channel and thus ensure the uniform distribution of the gas in the first mixing chamber.

[0061] A gas stove, characterized in that the gas stove comprises the burner as described above.

[0062] The positive progress effect of the present application is that:

[0063] (1) By arranging the first gas mixing cavity of the first combustion part and the second gas mixing cavity of the second combustion part in the base along the circumferential direction of the burner, the internal space of the base is reasonably utilized, the contradiction between sufficient flow channel space and the volume occupied by the base caused by the concentric arrangement of various gas mixing cavities in the base in the prior art is avoided, the volume of the base can be reduced, and heat loss is reduced.

[0064] (2) In order to ensure the coverage of each gas mixing cavity in the circumferential direction of the base, and further ensure the uniformity of the gas flow in the circumferential direction of each combustion part, a first extension channel is arranged at the end of the second gas mixing cavity, and the first extension channel extends to one side of the first gas mixing cavity, so as to meet the uniformity requirement of the gas flow in the circumferential direction of each combustion part.

[0065] (3) The scheme of arranging the first extension channel to extend to one side of another gas mixing cavity can reduce the flow resistance compared with other schemes, and can realize effective shunting of multiple gas flows while ensuring the smoothness of the gas flow in a smaller base diameter. BRIEF DESCRIPTION OF DRAWINGS

[0066] Figure 1 It is a schematic diagram of the three-dimensional structure of the burner of embodiment 1 of the present application.

[0067] Figure 2 It is a schematic diagram of the three-dimensional structure of the burner of embodiment 1 of the present application, wherein the outer fire cover and the gas distribution disc are hidden.

[0068] Figure 3 It is a schematic diagram of the layout relationship between the first gas mixing cavity and the second gas mixing cavity of the burner of embodiment 1 of the present application.

[0069] Figure 4 It is a schematic diagram of the three-dimensional structure of the base of embodiment 1 of the present application (I).

[0070] Figure 5 It is a schematic diagram of the three-dimensional structure of the burner of embodiment 1 of the present application, wherein the outer fire cover is hidden.

[0071] Figure 6 It is a schematic diagram of the three-dimensional structure of the burner of embodiment 1 of the present application, wherein the outer fire cover and the second gas distribution part of the gas distribution disc are hidden.

[0072] Figure 7 It is a schematic diagram of the top view structure of the burner of embodiment 1 of the present application.

[0073] Figure 8 Fig. 1 is a schematic view of a burner according to the present application. Figure 7 Fig. 2 is a sectional view of the burner of Fig. 1.

[0074] Figure 9 Fig. 3 is a sectional view of the burner of Fig. 1. Figure 7 Fig. 4 is a sectional view of the burner of Fig. 1.

[0075] Figure 10a Fig. 5 is a schematic view of a base of an embodiment of the present application (II).

[0076] Figure 10b Fig. 6 is a schematic view of the position relationship between a first mixing chamber and a second mixing chamber of the base of the embodiment of the present application.

[0077] Figure 11 Fig. 7 is a schematic view of a gas distribution disc of the embodiment of the present application.

[0078] Figure 12 Fig. 8 is a schematic view of the layout of gas distribution ports of the gas distribution disc of the embodiment of the present application.

[0079] Figure 13 Fig. 9 is a schematic view of the layout of gas distribution ports of a gas distribution disc of a second embodiment of the present application.

[0080] Figure 14 Fig. 10 is a schematic view of the layout of gas distribution ports of a gas distribution disc of a third embodiment of the present application.

[0081] Figure 15 Fig. 11 is a schematic view of the layout of gas distribution ports of a gas distribution disc of a fourth embodiment of the present application.

[0082] Legend of reference numerals:

[0083] Burner 100, circumferential direction X, radial direction Y, axial direction Z, secondary air passage 101, inner ring combustion section 1

[0084] Middle ring combustion section 2, first mixing chamber 21

[0085] Outer ring combustion section 3, second mixing chamber 31

[0086] Outer flame cap 4

[0087] Gas distribution disc 5, first gas distribution port 51, second gas distribution port 52, first gas distribution section 53, second gas distribution section 54, baffle 55

[0088] Base 6, first mixing chamber 61, second mixing chamber 62, first extension passage 63, inner ring mixing chamber 64, overlapping portion A

[0089] Inner ring ejector tube 71

[0090] Middle ring ejector tube 72

[0091] Outer ring ejector tube 73 Detailed Implementation

[0092] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0093] Example 1

[0094] like Figure 1 As shown, this embodiment provides a burner 100, specifically a three-channel, three-ring burner, which is used in a gas stove. The combustion and extinguishing of the three ring flames (inner ring, middle ring, and outer ring) are controlled by three sets of gas channels to achieve different flame combinations and meet different heating and cooking needs of users. For example, Figure 1 As shown, the circumferential direction of the burner 100 is defined as X, the radial direction as Y, and the axial direction as Z. Figure 1 As can be seen, the burner 100 has three rings of combustion sections arranged from the inside to the outside along its radial direction Y: an inner ring combustion section 1, a middle ring combustion section 2 (equivalent to the first combustion section), and an outer ring combustion section 3 (equivalent to the second combustion section). The middle ring combustion section 2 and the outer ring combustion section 3 are formed on the same burner cap, i.e., simultaneously formed on the outer burner cap 4, but the gas passages between the two combustion sections are separated to allow for independent opening and closing. The inner ring combustion section 1 is connected to the middle inner ring ejector tube 71, and is supplied with gas through the gas nozzle at the inner ring ejector tube 71. The middle ring combustion section 2 is connected to the right middle ring ejector tube 72 (equivalent to the first ejector tube), and is supplied with gas through the gas nozzle at the middle ring ejector tube 72. The outer ring combustion section 3 is connected to the left outer ring ejector tube 73 (equivalent to the second ejector tube), and is supplied with gas through the gas nozzle at the outer ring ejector tube 73. The gas from each ejector tube flows through the base 6 and the gas distribution plate 5, and after being distributed by the gas flow direction of the base 6 and the gas distribution plate 5, it flows to the corresponding combustion section.

[0095] like Figure 2 As shown, an inner ring mixing chamber 64, a first mixing chamber 61, and a second mixing chamber 62 are provided on the base. Along the gas flow direction, the ends of the inner ring ejector tube 71, the middle ring ejector tube 72, and the outer ring ejector tube 73 are all connected to the base 6. The inner ring ejector tube 71 is connected to the inner ring mixing chamber 64, the middle ring ejector tube 72 is connected to the first mixing chamber 61, and the outer ring ejector tube 73 is connected to the second mixing chamber 62. The corresponding gas is delivered to the inner ring mixing chamber of the inner ring combustion section 1, the first mixing chamber 21 of the middle ring combustion section 2, and the second mixing chamber 31 of the outer ring combustion section 3 via the inner ring mixing chamber 64, the first mixing chamber 61, and the second mixing chamber 62, respectively.

[0096] The first mixing chamber 61 and the second mixing chamber 62 are arranged on the base 6 along the circumferential direction X of the burner 100. Simultaneously, along the gas flow direction (i.e.,...) Figure 2The first extension channel 63 is arranged at the end of the second mixing chamber 62 and extends to one side of the first mixing chamber 61, and is located above the first mixing chamber 61, so as to overlap the first mixing chamber 61 in the axial direction Z of the burner 100 (see Figure 10b ).

[0097] The burner 100, by arranging the first mixing chamber 61 corresponding to the middle ring combustion part 2 and the second mixing chamber 62 corresponding to the outer ring combustion part 3 in the base 6 along the circumferential direction X of the burner 100, can reasonably utilize the internal space of the base 6, and avoid the contradiction between sufficient flow channel space and the occupied volume of the base 6 caused by the concentric arrangement of each mixing chamber in the base 6 in the prior art. By adopting the circumferential arrangement of the present scheme, the volume of the base 6 can be reduced, thereby reducing heat loss.

[0098] At the same time, in order to ensure the coverage of each mixing chamber in the circumferential direction of the base 6, and further ensure the uniformity of the gas flow in the circumferential direction X of each combustion part, the first extension channel 63 is arranged at the end of the second mixing chamber 62, so that the first extension channel 63 extends to one side of the first mixing chamber 61, so as to meet the uniformity requirement of the gas flow in the circumferential direction X of each combustion part.

[0099] Specifically, in the embodiment, the layout of the first mixing chamber 61 and the second mixing chamber 62 is as shown in Figure 10b , which shows that along the axial direction Z of the burner 100, the second mixing chamber 62 extends to the first mixing chamber 61 through the first extension channel 63, and forms an overlapping relationship with the first mixing chamber 61. Among them, the overlapping part A of the first extension channel 63 and the first mixing chamber 61 is basically arranged close to the circumferential edge of the base 6. This layout scheme can reasonably utilize the internal space of the base 6, so that the first mixing chamber 61 can be arranged along the circumferential direction X of the burner 100 at the circumferential edge of the base 6, so as to ensure the extension length of the first mixing chamber 61, so that the flow path of the gas in the first mixing chamber 61 can be as long as possible.

[0100] Further, by arranging the first extension channel 63 to extend to one side of another mixing chamber, the flow resistance can be reduced compared with other schemes, while ensuring the smoothness of the gas flow, and realizing effective shunting of multiple gas flows under a smaller base diameter.

[0101] As shown in Figure 2 , through the above layout scheme, the first mixing chamber 61 and the second mixing chamber 62 can both exhaust on the left and right sides of the base 6, which can meet the uniformity requirement of the gas flow in the circumferential direction X of the middle ring combustion part 2 and the outer ring combustion part 3.

[0102] On this basis, as shown in Figure 2 The inner ring gas mixing cavity 64 is arranged at the middle position of the base 6, so that the first gas mixing cavity 61 and the second gas mixing cavity 62 are arranged together around the inner ring gas mixing cavity 64. By arranging the first gas mixing cavity 61 and the second gas mixing cavity 62 located on the outer side along the circumferential direction X, sufficient arrangement space is provided for the inner ring gas mixing cavity 64 in the middle region of the base 6.

[0103] Of course, in other embodiments, the above layout and structure arrangement scheme for the first gas mixing cavity 61 and the second gas mixing cavity 62 can also be applied in other gas mixing cavities of the base, for example, between the inner ring gas mixing cavity and other gas mixing cavities, to also solve the problem of excessive size of the base 6 caused by the current concentric arrangement of the gas mixing cavities.

[0104] In addition, in other embodiments, a second extension channel can be further arranged at the end of the first gas mixing cavity, extending to the upper region or the lower region of the second gas mixing cavity through the second extension channel, to further stagger the arrangement between the two gas mixing cavities of the base, to meet the uniformity requirement of the gas circumferential direction of the corresponding combustion part by arranging the extension channel under the premise of circumferential arrangement of the gas mixing cavities.

[0105] In the present embodiment, as shown in Figure 3 The first gas mixing cavity 61 is arranged corresponding to the gas flow direction of the middle ring ejector pipe 72 (indicated by the dotted arrow), and at the same time, the second gas mixing cavity 62 is arranged on the side of the gas flow direction of the middle ring ejector pipe 72 (indicated by the dotted arrow). Figure 3 The dotted arrow indicates the direction of the gas flow. Figure 3 The dotted arrow indicates the direction of the gas flow.

[0106] For the traditional scheme of the ejector pipe accessing the annular gas mixing cavity, the gas mixing cavity region on the side of the end of the ejector pipe will form an invalid space, the more invalid spaces, the more likely to produce abnormal sound, and vortex region will be generated.

[0107] In the present scheme, by arranging the first gas mixing cavity 61 along the gas flow direction of the middle ring ejector pipe 72, and arranging the second gas mixing cavity 62 on the side of the gas flow direction of the middle ring ejector pipe 72, the relatively invalid space for the middle ring ejector pipe 72 is used to arrange the second gas mixing cavity 62, avoiding the waste of the internal space of the base 6, and realizing the reasonable utilization of the internal space of the base 6.

[0108] Of course, in other embodiments, it can also be arranged in reverse, that is, the second gas mixing cavity 62 is arranged corresponding to the gas flow direction of the outer ring ejector pipe 73, and at the same time, the first gas mixing cavity 61 is arranged on the side of the gas flow direction of the outer ring ejector pipe 73.

[0109] Further, as shown in Figure 2 and Figure 3As shown, the inner ring ejector pipe 71, the middle ring ejector pipe 72 and the outer ring ejector pipe 73 are arranged relatively parallel and on the same side of the base 6, so as to facilitate the layout and installation of the ejector pipes and reduce the waste of space near the base 6, and the processing and manufacturing are easier.

[0110] In addition, as Figure 4 shown, since the inner ring mixing chamber 64 in the embodiment is arranged at the middle position of the base 6, a communication passage 65 is arranged on the base 6 to penetrate from the outer surface of the base 6 to the inside, so as to realize the communication between the inner ring ejector pipe 71 and the inner ring mixing chamber 64, and the inner ring ejector pipe 71 can be arranged in the inner ring mixing chamber 64. Figure 4 As can be seen, the communication passage 65 is arranged between the first mixing chamber 61 and the second mixing chamber 62, so as to reasonably utilize the space of the base 6.

[0111] Specifically, as Figure 4 shown, the beginning of the first extension passage 63 is above the communication passage 65, wherein the passage height H1 of the first extension passage 63 at the position above the communication passage 65 is defined, and the total passage height H of the base at the position is H, and the passage height H1 of the first extension passage 63 should be greater than or equal to one third of the total height H of the base, so as to ensure the smoothness of the gas flow in the first extension passage 63, and then ensure the uniform distribution of the gas in the whole first mixing chamber 61.

[0112] As Figure 5 shown, it can be seen that the first mixing chamber 21 and the second mixing chamber 31 are combined by the outer fire cover 4 and the gas distribution disc 5, and this scheme of forming the first mixing chamber 21 and the second mixing chamber 31 by combination can simplify the structure of the burner 100, and facilitate the cleaning and maintenance of the inside of the first mixing chamber 21 and the second mixing chamber 31.

[0113] Specifically, the first mixing chamber 21 is arranged in the middle ring combustion part 2, the first mixing chamber 21 is communicated with the first mixing chamber 61 and the middle ring ejector pipe 72 through the first gas distribution port 51 on the gas distribution disc 5, and the second mixing chamber 31 is arranged in the outer ring combustion part 3, the second mixing chamber 31 is communicated with the second mixing chamber 62 and the outer ring ejector pipe 73 through the second gas distribution port 52 on the gas distribution disc 5, in order to adapt to the annular flame layout of the multi-ring fire, the first mixing chamber 21 and the second mixing chamber 31 are concentrically arranged with the axial direction Z of the burner 100 as the center. At the same time, as Figure 6As shown, the gas distribution disc 5 in the embodiment is composed of a first gas distribution part 53 and a second gas distribution part 54 stacked in the vertical direction. After hiding the second gas distribution part 54 on the upper side, it can be seen that, unlike the layout between the first mixing chamber 21 and the second mixing chamber 31, the first gas port 51 and the second gas port 52 on the gas distribution disc 5 are arranged along the circumferential direction X of the burner 100. By adjusting the layout of the first gas port 51 and the second gas port 52, the first gas port 51 and the second gas port 52 are arranged in a layout different from the first mixing chamber 21 and the second mixing chamber 31, so that the heat load of the burner 100 is improved.

[0114] Specifically, when the three-ring combustion part of the burner 100 is arranged along the radial direction Y in sequence, the first gas port 51 corresponding to the middle ring combustion part 2 and the second gas port 52 corresponding to the outer ring combustion part 3 are arranged along the circumferential direction X, so that the outlet area of the ring region of the burner 100 can be utilized relatively more by using the principle that the circumference is greater than the inner circumference under the same area. The circumferential direction X arrangement scheme adopted in the embodiment can maximize the space utilization of the gas port arrangement, reduce the space occupied by the gas port in the circumferential direction X, and enable the area not occupied by the gas port to be used for the secondary air passage 101 of the burner 100, thereby improving the secondary air supplement effect of the burner 100.

[0115] At the same time, under the same opening area, the arrangement of the first gas port 51 and the second gas port 52 along the circumferential direction X has a smaller circumference than the arrangement of the two along the radial direction Y. Therefore, under the condition that the gas flow resistance through the gas port is proportional to the circumference of the gas port, the arrangement of the first gas port 51 and the second gas port 52 along the circumferential direction X has smaller gas flow resistance through the gas, thereby ensuring the smoothness of the gas flow.

[0116] Therefore, through the structural arrangement scheme, by adjusting the arrangement position of the gas port corresponding to two rings in the multi-ring combustion part, the space for the secondary air passage 101 of the burner 100 is increased, and the gas port has smaller gas flow resistance through the gas, thereby improving the heat load of the burner 100.

[0117] This circumferential arrangement of the gas port scheme can increase the area of the gas outlet, thereby reducing the gas flow resistance and effectively controlling the flow rate of the gas entering the fire cap. In the embodiment, the cross-sectional area ratio of the first gas port 51 to the inlet of the first mixing chamber 61 is in the range of 2.5:1 to 4:1, and the cross-sectional area ratio of the second gas port 52 to the inlet of the second mixing chamber 62 is also in the range of 2.5:1 to 4:1.

[0118] Specifically, by making the cross-sectional area ratio of the gas outlet to the corresponding mixing chamber greater than 2.5:1, the cross-sectional area difference between the gas outlet and the mixing chamber is increased to improve the mixing degree of the gas and air, and at the same time, the gas pressure is increased to ensure the flow rate of the gas entering the mixing chamber through the gas outlet, avoiding the situation that the gas is too little and the airflow distribution is uneven at the mixing chamber away from the gas outlet. By making the cross-sectional area ratio of the gas outlet to the corresponding mixing chamber less than 4:1, the cross-sectional area difference between the gas outlet and the mixing chamber is avoided to be too large, which leads to the volume of the mixing chamber being too large, the overall volume of the base being expanded, affecting the installation arrangement of the burner, or the area of the gas outlet being too small, so that when the gas enters the mixing chamber from the mixing chamber through the gas outlet, the channel area is sharply reduced, the pressure in the mixing chamber is increased, affecting the performance of the ejector, at the same time, avoiding the local pressure of the gas being too large at the mixing chamber close to the gas outlet, so that the gas pressure corresponding to the gas outlet of the mixing chamber is much higher than that of other areas, causing uneven firepower.

[0119] Among them, the specific flow direction of the gas of the middle ring combustion part 2 and the outer ring combustion part 3 is as shown in Figures 7-9 , which shows the specific path of the gas of the two channels of the middle ring and the outer ring flowing from the first gas outlet 51 and the second gas outlet 52 arranged in the same circumference to the first mixing chamber 21 and the second mixing chamber 31 arranged concentrically. Among them, as shown in Figure 7 , the middle ring combustion part 2 mainly discharges in the form of uniformly distributed circular fire holes in the outer fire cover 4 to reduce the discharge resistance compared with other fire hole forms (such as square fire holes). And the outer ring combustion part 3 mainly discharges in the form of annular fire joints in the outer fire cover 4, the annular fire joints of the outer ring combustion part 3 are arranged on the outside of the outer fire cover 4, and the circular fire holes of the middle ring combustion part 2 are arranged on the inside of the outer fire cover 4,

[0120] Among them, the gas flow path of the middle ring combustion part 2 is as shown in Figure 8 , and Figure 8 the dashed arrow in the figure shows the specific path of the gas flowing from the middle ring ejector 72 to the first gas outlet 51 of the gas distribution disc 5 through the first mixing chamber 61 of the base 6, flowing to the first mixing chamber 21 through the first gas outlet 51, and finally discharging from the corresponding fire hole on the outer fire cover 4. The gas flow path of the outer ring combustion part 3 is as shown in Figure 9 , and Figure 9 the dashed arrow in the figure shows the specific path of the gas flowing from the outer ring ejector 73 to the second gas outlet 52 of the gas distribution disc 5 through the second mixing chamber 62 of the base 6, flowing to the second mixing chamber 31 through the second gas outlet 52, and finally discharging from the corresponding fire hole on the outer fire cover 4.

[0121] Specifically, in the present embodiment, as shown in Figure 6As shown, the first air distribution port 51 and the second air distribution port 52 have the same width and are arranged entirely along the circumferential direction X of the burner 100. Of course, in other embodiments, the widths of the first air distribution port 51 and the second air distribution port 52 may be different. For example, the width of the first air distribution port 51 may be smaller than that of the second air distribution port 52, or the width of the second air distribution port 52 may be smaller than that of the first air distribution port 51. In this case, the portions of the first air distribution port 51 and the portions of the second air distribution port 52 can be arranged along the circumferential direction X of the burner 100. This circumferential arrangement of the air distribution ports increases the space available for the secondary air passage 101. At the same time, it can reduce the gas resistance flowing through these air distribution ports, thereby increasing the heat load of the burner 100.

[0122] Compare Figure 8 and Figure 9 As can be seen, in this embodiment, from the perspective of gas flow uniformity, there are two first gas outlets 51 and two gas outlets 52 on the gas distribution plate 5, arranged in a symmetrical manner. The first gas outlets 51 and two gas outlets 52 are located within the same circumference, so as to achieve the purpose of making the secondary air channel 101 more spacious, reducing gas flow resistance and increasing the heat load of the burner 100.

[0123] like Figure 2 As shown, for the second mixing chamber 62 of the base 6 in this embodiment, along its gas flow direction (i.e. Figure 2 (As indicated by the dashed arrow), a first extension channel 63 is provided at the end of the second mixing chamber 62. This first extension channel 63 is used to directly communicate with the second air distribution port 52, and the first extension channel 63 is formed above the first mixing chamber 61, so that the first mixing chamber 61 and the second mixing chamber 62 are vertically overlapped at the location where the first extension channel 63 is provided. This structural arrangement is particularly suitable for situations where there are multiple first air distribution ports 51 and second air distribution ports 52, and the first air distribution ports 51 and second air distribution ports 52 are arranged in an alternating manner.

[0124] For example, in this embodiment, there are two first gas distribution ports 51 and two second gas distribution ports 52, and the first gas distribution ports 51 and the second gas distribution ports 52 are staggered. By setting an extension channel 63 at the end of the second mixing chamber 62 along the gas flow direction, the extension channel 63 extends to the top of the first mixing chamber 61 and communicates with the second gas distribution port 52. The gas in the first mixing chamber 61 flows below the extension channel 63 and is correspondingly delivered to the first gas distribution port 51, making the structural arrangement of the first mixing chamber 61 and the second mixing chamber 62 simpler.

[0125] Meanwhile, this structural arrangement can also reduce the volume of the burner 100 in both the height and width directions at the locations of the first mixing chamber 61 and the second mixing chamber 62, which facilitates the layout design and the fixed installation of the burner 100.

[0126] Specifically, such as Figure 10a As shown, after the gas enters the base 6 via the middle ring ejector pipe 72 in direction a, the structure of the first mixing chamber 61 within the base 6 will split the gas flow along directions a1 and a2 to two first gas distribution ports 51, respectively. The gas flowing along direction a2 will pass below the extension channel 63. Simultaneously, after the gas enters the base 6 via the outer ring ejector pipe 73 in direction b, the structure of the second mixing chamber 62 within the base 6 will split the gas flow along directions b1 and b2 to two second gas distribution ports 52, respectively. The gas flowing along direction b1 will pass through the extension channel 63 to the corresponding second gas distribution port 52. Furthermore, as... Figure 10b As shown, in this embodiment, the gas in the second mixing chamber 62 flows along direction b1 to the second gas distributor 52 at the overlapping portion A of the extension channel 63 and the first mixing chamber 61. That is, along the axial direction Z of the burner 100, the second gas distributor 52 overlaps with the extension channel 63 and is located entirely above the first mixing chamber 61. This structural arrangement can reduce the flow resistance of the gas in the second mixing chamber 62 flowing to the corresponding mixing chamber via the second gas distributor 52, and effectively utilize the internal space of the base 6 to achieve a reasonable distribution and arrangement of the gas flow path.

[0127] In addition, in this embodiment, an extension channel 63 is provided at the end of the second mixing chamber 62, so that the end of the second mixing chamber 62 is stacked above the first mixing chamber 61. This also takes into account the gas load relationship between the middle ring combustion section 2 and the outer ring combustion section 3. Specifically, in this embodiment, the gas load of the middle ring combustion section 2 is greater than that of the outer ring combustion section 3. Therefore, an extension channel 63 is provided at the end of the second mixing chamber 62 corresponding to the outer ring combustion section 3, so that the second mixing chamber 62 is partially stacked above the first mixing chamber 61. This makes the gas flow channel length of the first mixing chamber 61 longer than that of the second mixing chamber 62, allowing the length of the gas flow channel to be adapted to the larger gas load of the outer ring combustion section 3.

[0128] At the same time, such as Figure 9As shown, in the process of gas flowing from the second gas outlet 52 to the second mixing chamber 31, in order to achieve the purpose of changing the direction of gas flow and guiding the gas to flow in the correct direction, a baffle 55 (equivalent to a second gas guiding part) is arranged on the second annular partition plate between the first mixing chamber 21 and the second mixing chamber 31. The baffle 55 is specifically arranged in an inclined direction to guide the gas flowing out of the second gas outlet 52 to change direction and flow to the second mixing chamber 31 in an obliquely outward direction. Of course, in other embodiments, a baffle 55 can also be arranged for the first gas outlet 51 and the first mixing chamber 21 to guide the gas flowing out of the first gas outlet 51 to change direction and flow to the first mixing chamber 21.

[0129] As shown in Figure 11 and Figure 12 In this embodiment, the gas distribution disc 5 is composed of a first gas distribution part 53 and a second gas distribution part 54, which are arranged in a stacked manner from bottom to top. Among them, the first gas distribution part 53 is located on the lower side and is connected with the base 6, so the front part of the first gas outlet 51 and the front part of the second gas outlet 52 are formed on the first gas distribution part 53 along the direction of gas flow. The second gas distribution part 54 is located on the upper side and is connected with the outer fire cap 4, so the rear part of the first gas outlet 51 and the rear part of the second gas outlet 52 are formed on the second gas distribution part 54 along the direction of gas flow. The first gas distribution part 53 and the second gas distribution part 54 are combined to form the gas distribution disc 5, which is formed by arranging and combining separate parts to simplify the structure of the burner 100.

[0130] At the same time, since the range of the secondary air channel 101 in this embodiment is defined by the gas distribution disc 5, which is formed between the first gas distribution part 53 and the second gas distribution part 54, the first gas distribution part 53 and the second gas distribution part 54 are processed in a separate part manner and combined, so that the relatively complex structure can be realized by processing and combining separate parts.

[0131] As shown in Figure 11 The secondary air channel 101 is located between the first gas outlet 51 and the second gas outlet 52. Specifically, in this embodiment, the first gas outlet 51 and the second gas outlet 52 each have two, one of which is arranged adjacent to the other between the first gas outlet 51 and the second gas outlet 52, and the other is arranged adjacent to the other between the first gas outlet 51 and the second gas outlet 52, so as to form a larger space between the two groups of first gas outlets 51 and second gas outlets 52 for arranging the secondary air channel 101, improving the capacity of delivering secondary air to the inside of the burner 100, and providing sufficient combustion for the burner 100. Of course, in other embodiments, other layout methods can also be used to arrange the secondary air channel 101 between the first gas distribution part 53 and the second gas distribution part 54, and the specific arrangement position can be selected as needed.

[0132] In addition, in the embodiment, the first gas outlet 51 and the second gas outlet 52 are arranged relatively close to each other, and there is also a consideration of improving the sealing performance of the gas. Specifically, the first gas outlet 51 and the second gas outlet 52 are arranged adjacent to each other, and the layout of the two is relatively compact, so that the length of the sealing ring channel required when the burner 100 is sealed as a whole for the first gas outlet 51 and the second gas outlet 52 is relatively smaller, thereby reducing the risk of gas leakage by reducing the length of the sealing ring channel.

[0133] In the embodiment, taking the three-channel three-ring fire burner as an example, by adjusting the structure of the gas channel structure of the middle ring combustion part 2 and the outer ring combustion part 3 of the burner 100, the purposes of improving the secondary air supplement, ensuring the smoothness of the gas flow, and improving the heat load of the burner 100 are achieved. In other embodiments, the structural improvement of the combustion part can also be applied to the inner ring combustion part 1 and the middle ring combustion part 2 of the three-channel three-ring fire burner, or even to the inner ring combustion part 1 and the outer ring combustion part 3. At the same time, in other embodiments, this structural improvement of the combustion part can also be applied to other specifications of multi-ring fire burners, such as four-ring fire burners or five-ring fire burners.

[0134] Embodiment 2

[0135] The embodiment provides a burner, which has substantially the same structure as the burner provided in Embodiment 1, and the difference mainly lies in the difference in the layout positions of the first gas outlet 51 and the second gas outlet 52.

[0136] Specifically, as shown in Figure 13 In the embodiment, the widths of the first gas outlet 51 and the second gas outlet 52 are not consistent, and the width of the second gas outlet 52 is slightly wider than that of the first gas outlet 51, so that in the case where the first gas outlet 51 and the second gas outlet 52 are aligned in a section (the outer side of the circular ring), the other end (the inner side of the circular ring) of the second gas outlet 52 slightly protrudes from the first gas outlet 51. In this case, the protruding part of the second gas outlet 52 protruding from the first gas outlet 51 extends towards the first gas outlet 51 along the circumferential direction X of the burner and is arranged adjacent to the first gas outlet 51 along the radial direction Y of the burner. By extending the protruding part of the second gas outlet 52 protruding relatively towards the first gas outlet 51, the arrangement between the two gas outlets is more compact, so as to save the space occupied by the gas outlets.

[0137] Embodiment 3

[0138] The embodiment provides a burner, which has substantially the same structure as the burner provided in Embodiment 1, and the difference mainly lies in the difference in the layout positions of the first gas outlet 51 and the second gas outlet 52.

[0139] As shown in Figure 14 In this embodiment, the number of the first gas outlets 51 and the second gas outlets 52 is also two, but different from the embodiment 1, the first gas outlets 51 and the second gas outlets 52 are not arranged close to each other, but are arranged apart from each other, in this case, four empty spaces are formed between the two first gas outlets 51 and the two second gas outlets 52, and the four empty spaces can be used to arrange the secondary air channels 101.

[0140] In addition, in this embodiment, even if the first gas outlets 51 and the second gas outlets 52 are not arranged close to each other, the first gas outlets 51 and the second gas outlets 52 are alternately arranged according to the rule of the first gas outlet 51, the second gas outlet 52, the first gas outlet 51, the second gas outlet 52. This arrangement of the gas outlets can improve the uniformity of the gas supply, avoid the situation that the distribution of the gas in the combustion part is not uniform due to the too concentrated arrangement of the multiple gas outlets corresponding to a combustion part, and further affect the heating uniformity.

[0141] Embodiment 4

[0142] This embodiment provides a burner, which has substantially the same structure as the burner provided in the embodiment 1, and the difference mainly lies in the layout position difference of the first gas outlets 51 and the second gas outlets 52.

[0143] As shown in Figure 15 In this embodiment, the number of the first gas outlets 51 and the second gas outlets 52 is also two, but different from the embodiment 1, the first gas outlets 51 and the second gas outlets 52 are not arranged close to each other, but are arranged apart from each other, in this case, four empty spaces are formed between the two first gas outlets 51 and the two second gas outlets 52, and the four empty spaces can be used to arrange the secondary air channels 101.

[0144] Although the specific embodiments of the present application are described above, those skilled in the art should understand that this is only an example, the protection scope of the present application is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present application, and these changes and modifications all fall within the protection scope of the present application.

Claims

1. A burner comprising a base, the burner having a first combustion section and a second combustion section, characterized in that, The first mixing chamber corresponding to the first combustion part and the second mixing chamber corresponding to the second combustion part are arranged in the base, and the first mixing chamber and the second mixing chamber are arranged along the circumferential direction of the burner in the base; A first extension channel is arranged at the end of the second mixing chamber, and the first extension channel extends to one side of the base for arranging the first mixing chamber and is located above the first mixing chamber.

2. The burner of claim 1, wherein In the axial direction of the burner, the overlapping part of the first extension channel and the first mixing chamber is at least partially located at the circumferential edge of the base.

3. The burner of claim 1, wherein The burner further comprises a first draft tube and a second draft tube, and the ends of the first draft tube and the second draft tube are connected to the base in the gas flow direction. The end of the first draft tube is in communication with the end of the first mixing chamber along the circumferential direction of the burner, and / or the end of the second draft tube is in communication with the end of the second mixing chamber along the circumferential direction of the burner.

4. The burner of claim 3, wherein The first draft tube and the second draft tube are located on the same side of the base.

5. The burner of claim 1, wherein The burner further comprises a fire cover, and the first combustion part and the second combustion part are arranged in the fire cover above the base. In the axial direction of the burner, the first combustion part is in communication with the first mixing chamber through a first gas distribution port, the second combustion part is in communication with the second mixing chamber through a second gas distribution port, and at least part of the first gas distribution port is arranged along the circumferential direction of the burner with the second gas distribution port.

6. The burner of claim 5, wherein In the axial direction of the burner, at least one second gas distribution port partially overlaps with the first extension channel.

7. The burner of claim 5, wherein The cross-sectional area ratio of the first gas distribution port to the gas inlet of the first mixing chamber ranges from 2.5:1 to 4:

1. And / or, the cross-sectional area ratio of the second gas distribution port to the gas inlet of the second mixing chamber ranges from 2.5:1 to 4:

1.

8. The burner of claim 5, wherein The burner further comprises a gas distribution disc, and the first gas distribution port and the second gas distribution port are formed on the gas distribution disc, and the base, the gas distribution disc and the fire cover are arranged in a top-down direction. The first mixing chamber is jointly formed by the base and the gas distribution disc; and / or, The second mixing chamber is jointly formed by the base and the gas distribution disc; and / or, The first mixing chamber of the first combustion part is jointly formed by the gas distribution disc and the fire cover; and / or, The second mixing chamber of the second combustion part is jointly formed by the gas distribution disc and the fire cover.

9. The burner of claim 8, wherein In the axial direction of the burner, a secondary air channel of the burner is formed between the base and the fire cover. In the circumferential direction of the burner, the arrangement position of the secondary air channel is defined by the gas distribution disc.

10. The burner of claim 5, wherein In the radial direction of the burner, at least part of the second gas distribution port protrudes from the first gas distribution port, and the part of the second gas distribution port protruding from the first gas distribution port extends along the circumferential direction of the burner towards the first gas distribution port and is arranged adjacent to the first gas distribution port in the radial direction of the burner. And / or, the first gas distribution port and the second gas distribution port are arranged adjacent to each other.

11. The burner of claim 5, wherein The first gas outlet is multiple, and the multiple first gas outlets are arranged uniformly in a circle with the central axis of the burner as the center. And / or, the second gas outlet is multiple, and the second gas outlets are arranged symmetrically with the central axis of the burner as the center and uniformly in a circle with the central axis of the burner as the center. And / or, the number of the first gas outlet and the second gas outlet is multiple, and at least one of the first gas outlet and the second gas outlet is arranged in the radial direction of the burner.

12. The burner of any one of claims 1-11, wherein, The gas load of the first combustion part is greater than that of the second combustion part. And / or, a second extension channel is arranged at the end of the first gas mixing chamber in the gas flow direction, and the second extension channel extends to one side of the base for arranging the second gas mixing chamber and is located above the second gas mixing chamber.

13. The burner of any one of claims 1-11, wherein, The burner also has an inner ring combustion part, and the first combustion part and the second combustion part are located on the outer side of the inner ring combustion part, and the inner ring gas mixing chamber corresponding to the inner ring combustion part is arranged at the middle position of the base, and the first gas mixing chamber and the second gas mixing chamber are arranged around the inner ring gas mixing chamber.

14. The burner of claim 13, wherein The burner also includes an inner ring ejector pipe, and the end of the inner ring ejector pipe is connected to the base in the gas flow direction, and the inner ring ejector pipe communicates with the inner ring gas mixing chamber through the communication channel of the base, and the communication channel is arranged between the first gas mixing chamber and the second gas mixing chamber.

15. The burner of claim 14, wherein The first extension channel is at least partially located above the communication channel, and the channel height of the first extension channel above the communication channel is H1, and the total channel height of the base is H, and H1≥1 / 3H.

16. A gas hob, characterized in that The gas stove comprises the burner as claimed in any one of claims 1-15.

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