Burner and stove with burner

Abstract

The present invention provides a burner and a stove. The burner head has an inner ring gas mixing chamber, an outer ring gas mixing chamber and a secondary air channel. The secondary air channel is connected to the inner ring gas mixing chamber to supply the inner ring gas mixing chamber with external air. The gas duct of the burner includes a first gas duct connected to the inner ring gas mixing chamber and a second gas duct connected to the outer ring gas mixing chamber. The inner ring gas mixing chamber is connected to an inner ring fire cover, and the outer ring gas mixing chamber is connected to an outer ring fire cover. The first gas duct has a gas inlet end, and a gas booster for increasing the gas flow rate is provided on the gas inlet end. The inner ring gas mixing chamber has an inner ring mixed gas outlet, and the inner ring gas mixing chamber is connected to a pressure reducing structure for reducing the gas flow rate at the inner ring mixed gas outlet. The present invention first increases the speed and then decreases the speed. There is no need to supplement a large amount of secondary air. The overall height of the burner is reduced, the heat conduction surface is reduced, and the gas capacity utilization rate is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of household gas cookers, and in particular to a burner and a cooker having the burner. Background Art

[0002] Currently, burners operating at high temperatures often experience insufficient secondary air supply. To address this issue, existing technologies have increased the cross-sectional area of ​​the secondary air inlet passage by raising the overall height of the burner. While this approach ensures sufficient secondary air supply, the high burner height increases the contact area with the outside world, increasing heat dissipation and impacting thermal efficiency.

[0003] In addition, traditional burners have the following problems: (1) The outer ring channel is a single channel, making premixing of gas and air difficult; (2) The damper installation is cumbersome.

[0004] In view of this, it is necessary to improve the burner. Summary of the Invention

[0005] In order to at least partially solve the problems existing in the prior art, a burner is provided, including a burner head and an air guide pipe, the burner head has an inner ring air mixing chamber, an outer ring air mixing chamber and a secondary air channel, the secondary air channel is connected to the inner ring air mixing chamber to supply external air to the inner ring air mixing chamber; the air guide pipe includes a first air guide pipe and a second air guide pipe, the first air guide pipe is connected to the inner ring air mixing chamber, the second air guide pipe is connected to the outer ring air mixing chamber, the inner ring air mixing chamber is connected to an inner ring fire cover, the outer ring air mixing chamber is connected to an outer ring fire cover, the first air guide pipe has a gas inlet end, and a gas booster for increasing the gas flow rate is provided on the gas inlet end; the inner ring air mixing chamber has an inner ring mixed gas outlet, and the inner ring air mixing chamber is connected to a pressure reducing structure for reducing the gas flow rate at the inner ring mixed gas outlet.

[0006] The burner is equipped with a gas booster at the gas inlet end of the first gas duct to increase the gas flow rate; at the same time, the inner ring gas mixing chamber is connected to a pressure reducing structure that reduces the gas flow rate at the inner ring mixed gas outlet. In this way, the burner first increases speed and then decreases speed, using the increase in speed to entrain more oxygen, fully mix, and then decreases speed to avoid flame separation during combustion due to excessive pressure. Based on the design of first increasing speed and then decreasing speed, compared to traditional burners, since there is no need to supplement a large amount of secondary air, the height of the secondary air channel is greatly reduced, and the overall height of the burner can be only 300mm~400mm, making the overall height of the burner much lower than that of traditional burners (the overall height of traditional burners is 500mm~600mm). When the flame is burning, the contact area between the flame and the outside air is reduced, which reduces the conduction surface of heat conduction, improves the utilization rate of gas capacity, and has higher thermal efficiency.

[0007] Exemplarily, the pressure-reducing structure is disposed at the inner ring mixed gas outlet and has a blocking plate that completely blocks the inner ring mixed gas outlet. The blocking plate has a connecting hole connected to the inner ring mixed gas chamber. The cross-sectional area of ​​the inner ring mixed gas outlet is S1, and the cross-sectional area of ​​the connecting hole is S2, where S2 is less than S1. Thus, the cross-sectional area of ​​the connecting hole of the blocking plate is smaller than the cross-sectional area of ​​the inner ring mixed gas outlet. Due to the provision of the blocking plate, the flow of gas through the pressure-reducing structure is hindered, and the gas generates vortices, collisions, and friction at the blocking plate. The gas needs to overcome these resistances to flow through the connecting hole, which is manifested in the pressure after flowing through the connecting hole being lower than the pressure before flowing through the connecting hole. It can be concluded that the pressure of the gas exiting the connecting hole of the pressure-reducing structure is reduced, thereby achieving the purpose of reducing the gas flow rate.

[0008] For example, there are multiple communicating holes, and S2 is the sum of the cross-sectional areas of the multiple communicating holes. In this way, not only can the purpose of reducing the gas flow rate be achieved, but also the implementation is convenient.

[0009] For example, a gas channel is provided in the inner ring fire cover, and the gas channel is connected to the inner ring gas mixing chamber through the connecting hole, so that the gas flow rate can be effectively reduced.

[0010] Exemplarily, the inner ring fire cover has a top wall and a side wall, and the top wall and the side wall together form the gas channel, and the side wall has an inner surface and an outer surface, and the inner surface includes a first inner surface and a second inner surface arranged coaxially, and the first inner surface and the second inner surface are connected by a transition surface, and a plurality of first fire holes arranged in a circumferential direction are provided on the side wall, and the first fire holes penetrate the inner surface and the outer surface to connect the gas channel with the outside, and the first fire holes are inclined upward from the direction from the first fire hole inlet to the first fire hole outlet, and the first fire hole inlet is located on the inner surface of the side wall, and the first fire hole outlet is located on the outer surface of the side wall; a second fire hole and a third fire hole are provided below each of the first fire holes; the second fire hole extends from the outer surface toward the inner surface until it is connected with the first fire hole, and the third fire hole extends upward from the transition surface until it is connected with both the second fire hole and the first fire hole. In this way, the first fire hole outlet and the second fire hole outlet are distributed in two rows, upper and lower, on the outer surface of the side wall, and the first fire hole is connected to the second fire hole, which can play a pressure relief role; furthermore, the third fire hole is connected to the first fire hole and the second fire hole, which can further reduce the gas flow rate, reduce the gas flow rate to a reasonable range, and ensure that the flame does not separate.

[0011] Exemplarily, the burner includes a first ejector tube, a second ejector tube, and a third ejector tube. The second ejector tube is directly connected to the inner ring mixing chamber. A partition plate is provided within the outer ring mixing chamber, dividing the outer ring mixing chamber into a first outer ring mixing chamber and a second outer ring mixing chamber. The first ejector tube is directly connected to the first outer ring mixing chamber, and the third ejector tube is directly connected to the second outer ring mixing chamber. The first ejector tube and the third ejector tube are respectively located on either side of the second ejector tube. Thus, the second ejector tube is located in the middle, forming the inner ring ejector tube; the first ejector tube and the third ejector tube are located on either side, forming the outer ring ejector tube. Gas flows from either side into the outer ring ejector tube and enters the outer ring mixing chamber. The outer ring mixing chamber is provided with a partition plate, preventing convection and turbulence in the outer ring gas, which would affect gas mixing. Furthermore, due to the use of double ejectors in the outer ring, gas and air are fully premixed, improving the primary air mixing coefficient, resulting in more complete combustion and reducing harmful gas emissions.

[0012] Exemplarily, the first ejector tube has a first ejection inlet at one end away from the first outer ring mixing chamber, which is equipped with a first damper and a first nozzle; the second ejector tube has a second ejection inlet at one end away from the inner ring mixing chamber, which is equipped with a second damper and a second nozzle; the third ejector tube has a third ejection inlet at one end away from the second outer ring mixing chamber, which is equipped with a third damper and a third nozzle. The first, second, and third nozzles are all fixed to a nozzle fixing base. In this way, the ejection inlet of each ejector tube is equipped with a damper and a nozzle, so that the gas and air entering the ejection inlet can be more thoroughly mixed.

[0013] Exemplarily, the nozzle holder has a first and second opposing seating surfaces. The first seating surface is provided with a first nozzle interface, a second nozzle interface, and a third nozzle interface. The first nozzle is connected to the first nozzle interface, the second nozzle is connected to the second nozzle interface, and the third nozzle is connected to the third nozzle interface. The second seating surface is provided with a first air duct interface and a second air duct interface. The first air duct interface is connected to the first air duct, and the second air duct interface is connected to the second air duct. The nozzle holder has an inner ring airflow channel and an outer ring airflow channel. The first and third nozzle interfaces are both connected to the second air duct interface through the outer ring airflow channel, and the second nozzle interface is connected to the first air duct interface through the inner ring airflow channel. When gas flows into the nozzle holder, the outer ring gas flows through the outer ring airflow channel into the first and third nozzles, respectively. In this way, the valve body of the gas valve, which should have a three-channel valve, can be replaced with a conventional two-channel valve body. Only two air ducts, the first and second air ducts, are required, eliminating one air duct and reducing costs.

[0014] Exemplarily, the nozzle holder has a width direction and a length direction. The inner ring airflow channel extends from the first air duct interface along the width direction to the second nozzle interface. The outer ring airflow channel includes a first outer ring airflow channel, a second outer ring airflow channel, and a third outer ring airflow channel. The first outer ring airflow channel extends from the second air duct interface along the width direction to the third nozzle interface. The second outer ring airflow channel is arranged along the length direction. The third outer ring airflow channel extends from the first nozzle interface in the opposite direction along the width direction and communicates with the first outer ring airflow channel through the second outer ring airflow channel. In this way, the nozzle holder has a compact structure and a small size.

[0015] For example, a blower device is connected to one side of the nozzle holder, having an air outlet that communicates with the second outer ring airflow channel. This improves the outer ring primary air flow. The air blown by the blower device mixes with the gas for the first time in the nozzle holder before entering the outer ring mixing chamber for further mixing. When the gas burns, the burner head heats up due to heat conduction. The air brought in by the blower also heats up upon contact with the burner head, without affecting combustion thermal efficiency.

[0016] For example, a first mounting leg and a second mounting leg extend from the first seating surface. The first mounting leg is located outside the first nozzle interface, and the second mounting leg is located outside the third nozzle interface. A first mounting wall extends from the wall of the first ejector tube, and a second mounting wall extends from the wall of the third ejector tube. The first mounting leg is fixedly connected to the first mounting wall, and the second mounting leg is fixedly connected to the second mounting wall. In this way, the nozzle holder is assembled on the ejector tube via the first and second mounting legs on both sides, stably securing the nozzle and thereby maintaining consistent concentricity between the nozzle and ejector tube, reducing errors introduced during mass production.

[0017] Exemplarily, a first spoiler and a second spoiler extend from the first seat toward the burner head. The first spoiler is positioned between the first and second nozzle interfaces, and the second spoiler is positioned between the second and third nozzle interfaces. This isolates the three nozzles, reducing the mutual influence of airflow at the nozzle air-assisting holes. This protects the drawn air from turbulence, improves the mixing ratio of primary air and gas, and indirectly improves combustion efficiency.

[0018] For example, the first nozzle has a first damper connection section, to which the first damper is threaded; the second nozzle has a second damper connection section, to which the second damper is threaded; and the third nozzle has a third damper connection section, to which the third damper is threaded. This threaded connection facilitates instantaneous counterclockwise rotation to change the distance between the damper and the ejector tube, thereby varying the air intake volume. Compared to existing damper structures, this eliminates the need for components such as springs and clips, making installation more convenient.

[0019] For example, the first damper, the second damper, and the third damper are all circular plates, and the diameter of the first damper is larger than the diameter of the first inlet, the diameter of the second damper is larger than the diameter of the second inlet, and the diameter of the third damper is larger than the diameter of the third inlet. In this way, the dampers will not rotate into the inlet and fail to operate.

[0020] According to another aspect of the present invention, a stove is provided, comprising any one of the burners described above. Since the burner has the above beneficial effects, the stove comprising the burner must also have the above beneficial effects.

[0021] The advantages and features of the present invention are described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The following drawings of the present invention are hereby incorporated into the present invention for understanding the present invention. The drawings show embodiments of the present invention and their descriptions, and are used to explain the principles of the present invention. In the drawings,

[0023] Figure 1 is a structural diagram of a burner according to an exemplary embodiment of the present invention;

[0024] Figure 2 is an exploded view of a burner according to an exemplary embodiment of the present invention;

[0025] Figure 3a for Figure 1 A three-dimensional diagram of the burner in

[0026] Figure 3b is a cross-sectional view of the furnace head;

[0027] Figure 3c It is a longitudinal sectional view of the burner;

[0028] Figure 4a for Figure 1 A perspective view of a pressure-reducing structure according to an embodiment of the present invention;

[0029] Figure 4b for Figure 4aA top view of the pressure-reducing structural member;

[0030] Figure 4c for Figure 4a A cross-sectional view of the pressure reducing structural member;

[0031] Figure 5a for Figure 1 A three-dimensional view of the inner ring fire cover;

[0032] Figure 5b It is a cross-sectional view of the inner ring fire cover;

[0033] Figure 5c This is a bottom view of the inner ring fire cover;

[0034] Figure 6a for Figure 1 A perspective view of the middle nozzle seat;

[0035] Figure 6b This is the internal structure diagram of the nozzle holder;

[0036] Figure 7 for Figure 1 Stereoscopic view of the stroke gate;

[0037] Figure 8 for Figure 1 A perspective view of the middle nozzle;

[0038] Figure 9 for Figure 1 Schematic diagram of the connection between the gas valve and gas booster.

[0039] The above drawings include the following reference numerals:

[0040] 100—Burner

[0041] 10—Stovetop

[0042] 101—Ontology

[0043] 110—Inner ring mixing chamber

[0044] 111—Inner ring mixed gas outlet

[0045] 112—Installation Wall

[0046] 1121—Connection hole

[0047] 120—Outer ring mixing cavity

[0048] 121—First outer ring mixing cavity

[0049] 122—Second outer ring mixing cavity

[0050] 123—Isolation board

[0051] 130—Secondary air channel

[0052] 140—First ejector tube

[0053] 141—First injection entrance

[0054] 142—First installation wall

[0055] 150—Second ejector tube

[0056] 151—Second injection entrance

[0057] 160—Third ejector tube

[0058] 161—Third injection entrance

[0059] 162—Second installation wall

[0060] 20—Gas valve

[0061] 30—Airway

[0062] 310—First airway

[0063] 311—Gas inlet

[0064] 312—Gas outlet

[0065] 320—Second airway

[0066] 321—Gas inlet

[0067] 322—Gas outlet

[0068] 40—Inner ring fire cover

[0069] 410—Gas Channel

[0070] 420—Top wall

[0071] 430—Sidewall

[0072] 431—Inner surface

[0073] 4311—First inner surface

[0074] 4312—Transition surface

[0075] 4313—Second inner surface

[0076] 432—External surface

[0077] 433—lower end face

[0078] 440—First Fire Hole

[0079] 441—First fire hole entrance

[0080] 442—First fire hole outlet

[0081] 450—Second fire hole

[0082] 452—Second fire hole outlet

[0083] 460—Third Fire Hole

[0084] 50—Depressurized structural parts

[0085] 501—lower end surface

[0086] 502—Upper end surface

[0087] 503—Outer side

[0088] 5031—First outer side

[0089] 5032—Second outer side

[0090] 5033—Transition outer surface

[0091] 504—First cavity

[0092] 505—Second cavity

[0093] 506—Blocking piece

[0094] 51—Connecting hole

[0095] 52—Extension seat

[0096] 521—Connection hole

[0097] 610—First nozzle

[0098] 611—Damper connection section

[0099] 612—Air-assisted hole section

[0100] 6121—Air vent

[0101] 613—Interface connection segment

[0102] 620—Second nozzle

[0103] 630—Third nozzle

[0104] 710—First Air Gate

[0105] 711—Outer Edge

[0106] 720—Second air door

[0107] 730—Third air gate

[0108] 80—Nozzle fixing seat

[0109] 801—First Seat

[0110] 802—Second Seat

[0111] 81—First nozzle interface

[0112] 82—Second nozzle interface

[0113] 83—Third nozzle interface

[0114] 84—First airway interface

[0115] 85—Second airway interface

[0116] 86—Inner Ring Airflow Channel

[0117] 87—Outer Ring Airflow Channel

[0118] 871—First Outer Ring Airflow Channel

[0119] 872—Second outer ring airflow channel

[0120] 873—Third Outer Ring Airflow Channel

[0121] 90—Gas Booster DETAILED DESCRIPTION

[0122] In the following description, a large amount of detail is provided to facilitate a thorough understanding of the present invention. However, it will be appreciated by those skilled in the art that the following description merely illustrates preferred embodiments of the present invention, and that the present invention may be practiced without one or more of these details. Furthermore, to avoid confusion with the present invention, some technical features well known in the art have not been described in detail.

[0123] The burner of the embodiment of the present invention can be used for a stove, for example, a household gas stove (not shown in the figure). When in use, the burner can be used as follows Figure 1 The horizontal position (as shown by arrow A) is installed on the gas stove and connected to the gas source (not shown in the figure), so that the gas is ignited and burned through the burner and supplied to the user for cooking.

[0124] The following will combine Figures 1 to Figure 9 A burner according to an embodiment of the present invention will be described.

[0125] Figure 1 and Figure 2As shown, the burner includes a burner head 10 and an air guide pipe 30. The burner head 10 has an inner ring air mixing chamber 110, an outer ring air mixing chamber 120 and a secondary air channel 130. The secondary air channel 130 is connected to the inner ring air mixing chamber 110 to supply external air to the inner ring air mixing chamber 110. There are two air guide pipes 30, including a first air guide pipe 310 and a second air guide pipe 320. The first air guide pipe 310 is connected to the inner ring air mixing chamber 110, and the second air guide pipe 320 is connected to the outer ring air mixing chamber 120. The inner ring air mixing chamber 110 is connected to the inner ring fire cover 40, and the outer ring air mixing chamber 120 is connected to the outer ring fire cover (the outer ring fire cover is not shown in the figure). The first gas duct 310 has a gas inlet end 311, which is used to connect to the gas valve 20, and a gas booster 90 is provided on the gas inlet end 311 to increase the gas flow rate; the inner ring gas mixing chamber 110 has an inner ring mixed gas outlet 111, and the inner ring gas mixing chamber 110 is connected to a pressure reducing structure 50 to reduce the gas flow rate of the inner ring mixed gas outlet 111.

[0126] The burner is provided with a gas booster 90 for increasing the gas flow rate at the gas inlet end 311 of the first gas duct 310; at the same time, the inner ring gas mixing chamber 110 is connected to a pressure reducing structure 50 for reducing the gas flow rate at the inner ring mixed gas outlet 111. In this way, the burner first increases speed and then decreases speed, using the increase in speed to entrain more oxygen, fully mix, and then decreases speed to avoid flame separation during combustion due to excessive pressure. Based on the design of increasing speed first and then decreasing speed, compared to traditional burners, since there is no need to add a large amount of secondary air, the height h of the secondary air channel 130 (such as Figure 3c ) is greatly reduced, and the overall height of the burner can be only 300mm~400mm, that is to say, the overall height of the burner is much lower than the traditional burner (the traditional burner height is 500mm~600mm). When the flame is burning, the contact area between the flame and the outside air is reduced, which reduces the conduction area of ​​heat conduction, improves the utilization rate of gas capacity, and has higher thermal efficiency.

[0127] See also Figure 3a 、 Figure 3b and Figure 3cThe burner head 10 includes a main body 101 and three ejector tubes (a first ejector tube 140, a second ejector tube 150, and a third ejector tube 160). The main body 101 forms an inner ring gas mixing chamber 110, an outer ring gas mixing chamber 120, and a secondary air channel 130. The inner ring gas mixing chamber 110 has at least two mounting walls 112 extending outward from its wall, each of which is provided with a connection hole 1121. An isolation plate 123 is provided within the outer ring gas mixing chamber 120 to separate the outer ring gas mixing chamber 120 into a first outer ring gas mixing chamber 121 and a second outer ring gas mixing chamber 122. The second ejector tube 150 is directly connected to the inner ring gas mixing chamber 110, the first ejector tube 140 is directly connected to the first outer ring gas mixing chamber 121, and the third ejector tube 160 is directly connected to the second outer ring gas mixing chamber 122. The first ejector tube 140 and the third ejector tube 160 are respectively located on both sides of the second ejector tube 150. That is, the second ejector tube 150 serves as the inner ring ejector tube, and the first ejector tube 140 and the third ejector tube 160 serve as the outer ring ejector tubes. Specifically, the first ejection tube 140 has a first ejection inlet 141 and a first ejection outlet 142, and the first ejection outlet 142 is opened on the wall of the first outer ring mixing chamber 121 so as to be directly connected to the first outer ring mixing chamber 121; the second ejection tube 150 has a second ejection inlet 151 and a second ejection outlet 152, and the second ejection outlet 152 is opened on the wall of the inner ring mixing chamber 110 so as to be directly connected to the inner ring mixing chamber 110; the third ejection tube 160 has a third ejection inlet 161 and a third ejection outlet 162, and the third ejection outlet 162 is opened on the wall of the second outer ring mixing chamber 122 so as to be directly connected to the second outer ring mixing chamber 122. Based on the above configuration, the second ejector tube 150, serving as the inner ring ejector, is positioned in the center, while the first and third ejector tubes 140, 160, serving as the outer ring ejectors, are positioned on either side. Gas flows from either side into the outer ring ejector tubes and into the outer ring mixing chamber. The outer ring mixing chamber 120 is equipped with a partition 123 to prevent convection and turbulence in the outer ring gas, which could affect gas mixing. Furthermore, the dual ejection in the outer ring ensures thorough premixing of gas and air, improving the primary air mixing coefficient and ensuring more complete combustion, while reducing harmful gas emissions.

[0128] In the present invention, the burner head 10 can be made of a metal material such as cast iron, aluminum, or copper. The main body 101 and the three ejector tubes can be integrally formed using a mold, and then the tube holes of the first ejector tube 140, the second ejector tube 150, and the third ejector tube 160 can be formed through a core-pulling process. The integrally formed burner head 10 has good sealing performance and can reduce the risk of gas leakage from the burner. It should be understood that the main body 101 and the three ejector tubes can also be non-integrally formed. For example, the main body 101 and the three ejector tubes can be assembled by welding after they are individually formed. This is not limited here.

[0129] The gas valve 20 can adopt a common two-channel valve body type thermocouple assembly switch, one channel of which is connected to the first gas pipe 310 and the other channel is connected to the second gas pipe 320. The specific structure of the thermocouple assembly switch will not be described in detail here.

[0130] In the embodiment of the present invention, there are two gas ducts 30, namely, a first gas duct 310 and a second gas duct 320. The first gas duct 310 has a gas inlet end 311 and a gas outlet end 312. The gas inlet end 311 is connected to the interface of one channel of the gas valve 20 through the gas booster 90, and the gas outlet end 312 is connected to the first gas duct interface 84 of the nozzle fixing base 80; the second gas duct 320 has a gas inlet end 321 and a gas outlet end 322. The gas inlet end 321 is connected to the interface of another channel of the gas valve 20, and the gas outlet end 322 is connected to the second gas duct interface 85 of the nozzle fixing base 80. The structure of the nozzle fixing base 80 will be described in detail later.

[0131] See also Figure 2 and Figure 9 Gas booster 90, for example, utilizes low-pressure gas at the larger piston end to generate high-pressure gas at the smaller piston end. Specifically, it has an inlet 91 and an outlet 92. The cross-sectional area of ​​outlet 92 is smaller than that of inlet 91, thereby producing high-pressure gas at outlet 92 and increasing the gas flow rate. Gas booster 90 may also utilize other existing components capable of increasing gas flow rate, such as a booster valve. Since booster valves are conventional, their detailed description is omitted here.

[0132] See also Figure 4a and Figure 4b The pressure reducing structure 50 of one embodiment of the present invention is arranged at the inner ring mixed gas outlet 111, and has a blocking plate 506 that completely blocks the inner ring mixed gas outlet 111. The blocking plate 506 has a connecting hole 51 connected to the inner ring mixed gas chamber 110. The cross-sectional area of ​​the inner ring mixed gas outlet 111 is S1, and the cross-sectional area of ​​the connecting hole 51 is S2, and S2 is less than S1. Based on the arrangement of the pressure reducing structure 50 with this structure, the flow of the gas is hindered when it flows through the pressure reducing structure 50, and the gas generates vortices, collisions, and friction at the blocking plate 506. The gas needs to overcome these resistances to flow through the connecting hole 51, which is manifested in that the pressure after flowing through the connecting hole 51 is lower than the pressure before flowing through the connecting hole 51. In other words, the pressure of the gas flowing out of the connecting hole 51 of the pressure reducing structure is reduced, thereby achieving the purpose of reducing the gas flow rate.

[0133] As mentioned above, the pressure reducing structure 50 is actually a speed reducing structure. Specifically, the pressure reducing structure 50 has a first end face 501, a second end face 502 and an outer side face 503. The first end face 501 and the second end face 502 are opposite to each other. The first end face 501 has a first cavity 504 concave toward the second end face 502, and the second end face 502 has a second cavity 505 concave toward the first end face 501. The blocking plate 506 is arranged between the first cavity 504 and the second cavity 505. The connecting hole 51 passes through the blocking plate 506 to connect the first cavity 504 and the second cavity 505. There is no limit to the number of connecting holes 51, and it can be multiple, as long as the sum of the cross-sectional areas S2 of all connecting holes 51 is smaller than the cross-sectional area S1 of the inner ring mixture outlet 111. The blocking plate 506 can be as follows Figure 4c The decompression structure 50 is shown as being integral with the first end face 501, the second end face 502 and the outer side face 503. In other embodiments not shown, the blocking piece 506 may also be separate from the first end face 501, the second end face 502 and the outer side face 503.

[0134] Furthermore, to facilitate installation of the pressure-reducing structural member 50, the outer surface 503 includes a first outer surface 5031 and a second outer surface 5032. The pressure-reducing structural member 50 is generally cylindrical, with the diameter of the first outer surface 5031 being smaller than that of the second outer surface 5032. The first outer surface 5031 and the second outer surface 5032 are connected by a transition outer surface 5033, giving the outer surface 503 a stepped surface. Extension seats 52 extend outward from the second outer surface 5032. The number of extension seats 52 equals the number of mounting walls 112 extending outward from the inner annular gas mixing chamber 110, and the extension seats 52 correspond one-to-one with the mounting walls 112. The extension seats 52 have connecting holes 521, which can be installed by screws or bolts inserted through the connecting holes 521 in the extension seats 52 and the connecting holes 1121 in the mounting walls 112.

[0135] The above is only one specific embodiment of the pressure-reducing structural member 50. In embodiments not shown, the pressure-reducing structural member 50 may also be a pressure-reducing valve. The pressure-reducing structural member 50 may also be implemented by expanding the gas passageway connecting to the inner annular gas mixing chamber 110. The pressure-reducing structural member 50 may also be implemented by providing corrugations on the inner wall of the inner annular gas mixing chamber 110. Other structural forms of the pressure-reducing structural member 50 include a pressure-reducing valve combined with a variable-cross-section inner annular gas mixing chamber 110, and so on. Examples are not provided here.

[0136] See also Figure 1 、 Figure 2 、 5a , 5b and 5c, the inner ring fire cover 40 has a gas channel 410, and the gas channel 410 is connected with the inner ring gas mixing chamber 110 through the connecting hole 51, so that the gas flow rate can be effectively reduced.

[0137] Specifically, the inner ring fire cover 40 has a top wall 420 and a side wall 430, which enclose a gas channel 410. For example, the side wall 430 extends downward from the periphery of the top wall 420 to enclose the gas channel 410. In this way, the gas channel 410 can be formed with a simple structure.

[0138] The side wall 430 has an inner surface 431 and an outer surface 432. The inner surface 431 includes a first inner surface 4311 and a second inner surface 4313 arranged coaxially. The first inner surface 4311 and the second inner surface 4313 are connected by a transition surface 4312. The side wall 430 is provided with a plurality of first fire holes 440 arranged in a circumferential direction. That is, a circle of first fire holes 440 is provided on the side wall 430. The first fire holes 440 penetrate the first inner surface 4311 and the outer surface 432 to connect the gas channel 410 with the outside. The first fire holes 440 are inclined upward along the direction from the first fire hole inlet 441 to the first fire hole outlet 442. The first fire hole inlet 441 is located on the first inner surface 4311 of the side wall, and the first fire hole outlet 442 is located on the first inner surface 4311 of the side wall. On the outer surface 432 of the side wall; below each first fire hole 440, a second fire hole 450 and a third fire hole 460 are provided; the second fire hole 450 extends from the outer surface 432 toward the inner surface 431 until it communicates with the first fire hole 440, so that the second fire hole outlet 452 is provided on the outer surface 432 and is located below the first fire hole outlet 442; the third fire hole 460 extends upward from the transition surface 4312 until it communicates with both the second fire hole 450 and the first fire hole 440. In this way, the first fire hole outlets 442 and the second fire hole outlets 452 are distributed in two rows, one above the other, on the outer surface 432 of the side wall, and the first fire hole 440 communicates with the second fire hole 450, which can provide a pressure relief function; furthermore, the third fire hole 460 communicates with both the first fire hole 440 and the second fire hole 450, which can further reduce the gas flow rate to a reasonable range and ensure that the flame does not separate.

[0139] The aforementioned first flame holes 440 provide the main flame for heating. The first flame holes 440 can be evenly spaced on the inner ring fire cover 40. Alternatively, the first flame holes 440 can be unequally spaced on the inner ring fire cover 40 as needed. It should be noted that the "inner surface" and "outer surface" referred to herein are relative to when the inner ring fire cover 40 is attached to the pressure reducing structure 50. After the inner ring fire cover 40 is attached to the pressure reducing structure 50, the exposed surface is the outer surface, while the unexposed surface is the inner surface.

[0140] In addition, the pressure reducing structure 50 is as follows Figure 4aIn the illustrated structure, the inner ring fire cover 40 covers the pressure reducing structure 50, and the gas passage 410 is directly connected to the second cavity 505. Since the first cavity 404 is directly connected to the inner ring gas mixing chamber 110, the first cavity 404 and the second cavity 505 are connected through the connecting hole 51. In this way, the gas passage 410 can be connected to the inner ring gas mixing chamber 110. The second inner surface 4313 forms a surface contact with the first outer surface 5031, and the lower end surface 433 of the side wall 430 forms a surface contact with the transition outer surface 5033, thereby achieving a good sealing effect.

[0141] Again, refer to Figure 1 and Figure 2 The first air guide 310 is indirectly connected to the inner ring mixing chamber 110, and the second air guide 320 is indirectly connected to the outer ring mixing chamber 120. Figure 3b The first ejector tube 140 has a first ejection inlet 141 at its end away from the first outer ring gas mixing chamber 121, at which a first damper 710 and a first nozzle 610 are installed. The second ejector tube 150 has a second ejection inlet 151 at its end away from the inner ring gas mixing chamber 110, at which a second damper 720 and a second nozzle 620 are installed. The third ejector tube 160 has a third ejection inlet 161 at its end away from the second outer ring gas mixing chamber 122, at which a third damper 730 and a third nozzle 630 are installed. The first nozzle 610, the second nozzle 620, and the third nozzle 630 are all fixed to the nozzle fixing base 80. Thus, each ejector tube has an ejection inlet equipped with a damper and a nozzle, allowing the gas and air entering the ejection inlet to be more thoroughly mixed.

[0142] like Figure 6a and Figure 6bAs shown, the nozzle holder 80 has a first seating surface 801 and a second seating surface 802 facing each other. The first seating surface 801 is provided with a first nozzle interface 81, a second nozzle interface 82, and a third nozzle interface 83. The first nozzle 610 is connected to the first nozzle interface 81, the second nozzle 620 is connected to the second nozzle interface 82, and the third nozzle 630 is connected to the third nozzle interface 83. The second seating surface 802 is provided with a first air duct interface 84 and a second air duct interface 85. The first air duct interface 84 is connected to the first air duct 310, and the second air duct interface 85 is connected to the second air duct 320. The nozzle holder 80 has an inner ring airflow channel 86 and an outer ring airflow channel 87. The first nozzle interface 81 and the third nozzle interface 83 are both connected to the second air duct interface 85 through the outer ring airflow channel 87, and the second nozzle interface 82 is connected to the first air duct interface 84 through the inner ring airflow channel 86. When the gas flows into the nozzle fixing seat 80, the outer ring gas flows into the first nozzle 610 and the third nozzle 630 respectively through the outer ring airflow channel 87. In this way, the thermocouple assembly switch that should adopt a three-channel valve body can adopt a common two-channel valve body thermocouple assembly switch. At the same time, only two gas pipes, the first gas pipe 310 and the second gas pipe 320, are required, which reduces one gas pipe and reduces the cost.

[0143] In an exemplary embodiment of the present invention, the nozzle fixing seat 80 has a width direction (eg Figure 6a X direction in the Figure 6a In the Y direction, the inner ring airflow channel 86 extends from the first air duct interface 84 along the width direction to the second nozzle interface 82. The outer ring airflow channel 87 includes a first outer ring airflow channel 871, a second outer ring airflow channel 872, and a third outer ring airflow channel 873. The first outer ring airflow channel 871 extends from the second air duct interface 85 along the width direction to the third nozzle interface 83. The second outer ring airflow channel 872 is arranged along the length direction. The third outer ring airflow channel 873 extends from the first nozzle interface 81 in the opposite direction along the width direction and communicates with the first outer ring airflow channel 871 through the second outer ring airflow channel 872. As a result, the nozzle holder 80 has a compact structure and a small size.

[0144] In an embodiment not shown, a blower device may be connected to one side of the nozzle holder 80, the blower device having a blower outlet that is connected to the second outer ring airflow channel 872. This can improve the outer ring primary air. The air blown by the blower device is mixed with the gas for the first time in the nozzle holder 80, and then enters the outer ring gas mixing chamber 120 for further mixing. When the gas burns, the burner head increases in temperature due to heat conduction. The air brought in by the blower temperature rises after contacting the burner head, without affecting the combustion thermal efficiency. The blower device can be a common blower, or it can be a fan, as long as it can supply air to the second outer ring airflow channel 872 in the nozzle holder 80.

[0145] Furthermore, a first mounting leg 88 and a second mounting leg 89 extend from the first seating surface 801. The first mounting leg 88 is located outside the first nozzle interface 81, and the second mounting leg 89 is located outside the third nozzle interface 83. A first mounting wall 142 extends from the wall of the first ejector tube 140, and a second mounting wall 162 extends from the wall of the third ejector tube 160. The first mounting leg 88 is fixedly connected to the first mounting wall 142, and the second mounting leg 89 is fixedly connected to the second mounting wall 162. In this way, the nozzle holder 80 is assembled to the ejector tube via the first mounting legs 88 and the second mounting legs 89 on both sides, stably securing the nozzles and thereby maintaining concentricity between the nozzles and the ejector tubes (i.e., the first nozzle 610 maintains concentricity with the first ejector tube 140, the second nozzle 620 maintains concentricity with the second ejector tube 150, and the third nozzle 630 maintains concentricity with the third ejector tube 160), thereby reducing errors caused by mass production.

[0146] Furthermore, a first spoiler 810 and a second spoiler 8110 extend from the first seating surface 801 toward the burner head 10. The first spoiler 810 is positioned between the first nozzle interface 81 and the second nozzle interface 82, while the second spoiler 8110 is positioned between the second nozzle interface 82 and the third nozzle interface 83. This isolates the three nozzles, reducing the mutual influence of airflow at the nozzle air-supporting holes (described below), freeing the drawn air from turbulence, improving the mixing ratio of primary air and gas, and indirectly enhancing combustion efficiency.

[0147] See also Figure 8 The first nozzle 610 has a first damper connecting section 611, an air-assisting hole section 612, and an interface connecting section 613. The first damper connecting section 611 is provided with threads so that the first damper 710 can be adjustably connected to the first nozzle 610. In other words, the first damper 710 is threadedly connected to the first damper connecting section 611. In this way, through the threaded connection, it is convenient to change the distance between the first damper 710 and the first ejector tube 140 by instantaneous counterclockwise rotation to change the air intake volume. Compared with the damper structure used in the market, it reduces the number of parts such as springs and buckles, making installation more convenient. The air-assisting hole section 612 is provided with an air-assisting hole 6121. The first nozzle 610 has a nozzle flow channel (not shown in the figure). The air-assisting hole 6121 is connected to the nozzle flow channel and is used to replenish air in the nozzle flow channel. The interface connecting section 613 is used to connect to the first nozzle interface 81.

[0148] The second nozzle 620 and the third nozzle 630 have the same structure as the first nozzle 610. Specifically, the second nozzle 620 has a second damper connecting section, to which the second damper 720 is threadedly connected; the third nozzle 630 has a third damper connecting section, to which the third damper 730 is threadedly connected. The detailed structures of the second and third nozzles 620 and 630 are similar to those of the first nozzle 610 and are not further described here.

[0149] See also Figure 1 、 Figure 2 and Figure 7 The first damper 710, the second damper 720 and the third damper 730 are all circular plates, and the diameter of the first damper 710 is larger than the diameter of the first inlet 141, the diameter of the second damper 720 is larger than the diameter of the second inlet 151, and the diameter of the third damper 730 is larger than the diameter of the third inlet 161. In this way, each damper will not rotate into its corresponding inlet and will not work. The first damper 710, the second damper 720 and the third damper 730 have exactly the same structure. Taking the first damper 710 as an example, the first damper 710 is a circular plate, and the outer edge 711 of the first damper 710 has teeth to facilitate the adjustment of the position of the first damper 710. The detailed structure of the second damper 720 and the third damper 730 can be referred to the first damper 710, and will not be described in detail here.

[0150] When the burner of the present invention is in use, after pressing the valve body of the gas valve 20, the inner ring gas is acted upon by the gas booster 90, thereby increasing the flow velocity of the inner ring gas, entering the first gas guide pipe 310, and then flowing into the inner ring gas mixing chamber 110 through the nozzle fixing seat 80, the second nozzle 620, and the second ejector pipe 150. Due to the accelerated gas flow velocity, more primary air is brought in through the air-assisting hole of the second nozzle 620, thereby increasing the primary air coefficient, making the combustion more complete, reducing the emission of harmful gases such as CO, and improving the thermal efficiency accordingly.

[0151] According to another aspect of the present invention, a stove is provided, which has any of the burners described above. Other structural components of the stove may have various existing or future structures, which do not limit the scope of protection of the present invention.

[0152] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by directional words such as "inside", "outside", "horizontal" and "down" are usually based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside" and "outside" refer to the inside and outside relative to the outline of each component itself.

[0153] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship between one or more components or features shown in the figures and other components or features. It should be understood that spatially relative terms include not only the orientation of the components as described in the figures, but also different orientations during use or operation. For example, if the components in the drawings are inverted as a whole, the components "above other components or features" or "above other components or features" will include the situation where the components are "below other components or structures" or "below other components or structures". Therefore, the exemplary term "above" can include both the orientations of "above" and "below". In addition, these components or features can also be positioned at other different angles (for example, rotated 90 degrees or other angles), and this document is intended to include all of these situations.

[0154] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, parts, components and / or combinations thereof.

[0155] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0156] The present invention has been described through the above-described embodiments. However, it should be understood that the above-described embodiments are for illustrative and illustrative purposes only and are not intended to limit the present invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments and that various variations and modifications may be made based on the teachings of the present invention, all of which fall within the scope of the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A burner comprising a burner head and an air duct, wherein the burner head has an inner ring air mixing chamber, an outer ring air mixing chamber, and a secondary air channel, wherein the secondary air channel is connected to the inner ring air mixing chamber to supply the inner ring air mixing chamber with external air; the air duct comprises a first air duct and a second air duct, wherein the first air duct is connected to the inner ring air mixing chamber, and the second air duct is connected to the outer ring air mixing chamber, wherein the inner ring air mixing chamber is connected to an inner ring fire cover, and the outer ring air mixing chamber is connected to an outer ring fire cover, wherein: The first gas guide pipe has a gas inlet end, and the gas inlet end is provided with a gas booster for increasing the gas flow rate; The inner ring gas mixing cavity has an inner ring mixed gas outlet, and the inner ring gas mixing cavity is connected to a pressure reducing structure for reducing the gas flow rate of the inner ring mixed gas outlet; The burner head is provided with a first ejector tube, a second ejector tube and a third ejector tube, the second ejector tube is directly connected to the inner ring gas mixing chamber; an isolation plate is provided in the outer ring gas mixing chamber, the isolation plate divides the outer ring gas mixing chamber into a first outer ring gas mixing chamber and a second outer ring gas mixing chamber, the first ejector tube is directly connected to the first outer ring gas mixing chamber, the third ejector tube is directly connected to the second outer ring gas mixing chamber; and the first ejector tube and the third ejector tube are respectively located on both sides of the second ejector tube.

2. The burner according to claim 1, characterized in that The pressure reducing structure is arranged at the inner ring mixed gas outlet and has a blocking plate that completely blocks the inner ring mixed gas outlet. The blocking plate has a connecting hole connected to the inner ring mixed gas cavity. The cross-sectional area of ​​the inner ring mixed gas outlet is S1, and the cross-sectional area of ​​the connecting hole is S2, S2<S1.

3. The burner according to claim 2, characterized in that There are multiple communicating holes, and S2 is the sum of the cross-sectional areas of the multiple communicating holes.

4. The burner according to claim 2 or 3, characterized in that A gas passage is provided in the inner ring fire cover, and the gas passage is communicated with the inner ring gas mixing cavity through the communicating hole.

5. The burner according to claim 4, characterized in that The inner ring fire cover has a top wall and a side wall, and the top wall and the side wall together form the gas channel, and the side wall has an inner surface and an outer surface, and the inner surface includes a first inner surface and a second inner surface arranged coaxially, and the first inner surface and the second inner surface are connected by a transition surface, and a plurality of first fire holes arranged in a circumferential direction are provided on the side wall, and the first fire holes penetrate the inner surface and the outer surface to connect the gas channel with the outside, and the first fire holes are inclined upward along the direction from the first fire hole inlet to the first fire hole outlet, the first fire hole inlet is located on the inner surface of the side wall, and the first fire hole outlet is located on the outer surface of the side wall; a second fire hole and a third fire hole are provided below each of the first fire holes; the second fire hole extends from the outer surface toward the inner surface until it is connected with the first fire hole, and the third fire hole extends upward from the transition surface until it is connected with both the second fire hole and the first fire hole.

6. The burner according to claim 1, characterized in that The first ejection tube has a first ejection inlet at one end away from the first outer ring air mixing chamber, and a first damper and a first nozzle are provided at the first ejection inlet; the second ejection tube has a second ejection inlet at one end away from the inner ring air mixing chamber, and a second damper and a second nozzle are provided at the second ejection inlet; the third ejection tube has a third ejection inlet at one end away from the second outer ring air mixing chamber, and a third damper and a third nozzle are provided at the third ejection inlet, and the first nozzle, the second nozzle and the third nozzle are fixed together on a nozzle fixing seat.

7. The burner according to claim 6, characterized in that The nozzle fixing seat has a first seat surface and a second seat surface relative to each other, and a first nozzle interface, a second nozzle interface and a third nozzle interface are provided on the first seat surface, the first nozzle is connected to the first nozzle interface, the second nozzle is connected to the second nozzle interface, and the third nozzle is connected to the third nozzle interface; a first air duct interface and a second air duct interface are provided on the second seat surface, the first air duct interface is connected to the first air duct, and the second air duct interface is connected to the second air duct; an inner ring airflow channel and an outer ring airflow channel are provided in the nozzle fixing seat, the first nozzle interface and the third nozzle interface are both communicated with the second air duct interface through the outer ring airflow channel, and the second nozzle interface is communicated with the first air duct interface through the inner ring airflow channel.

8. The burner according to claim 7, characterized in that The nozzle fixing seat has a width direction and a length direction, the inner ring airflow channel extends from the first air duct interface along the width direction to the second nozzle interface, the outer ring airflow channel includes a first outer ring airflow channel, a second outer ring airflow channel and a third outer ring airflow channel, the first outer ring airflow channel extends from the second air duct interface along the width direction to the third nozzle interface, the second outer ring airflow channel is arranged along the length direction, and the third outer ring airflow channel extends from the first nozzle interface in the opposite direction along the width direction and communicates with the first outer ring airflow channel through the second outer ring airflow channel.

9. The burner according to claim 8, characterized in that An air blowing device is connected to one side of the nozzle fixing seat. The air blowing device has an air blowing outlet, and the air blowing outlet is communicated with the second outer ring air flow channel.

10. The burner according to claim 8, characterized in that A first mounting leg and a second mounting leg extend from the first seat surface, the first mounting leg is located on the outside of the first nozzle interface, and the second mounting leg is located on the outside of the third nozzle interface. A first mounting wall extends from the tube wall of the first ejector tube, and a second mounting wall extends from the tube wall of the third ejector tube. The first mounting leg is fixedly connected to the first mounting wall, and the second mounting leg is fixedly connected to the second mounting wall.

11. The burner according to claim 7, characterized in that A first spoiler and a second spoiler are extended from the first seat surface toward the burner head. The first spoiler is arranged between the first nozzle interface and the second nozzle interface, and the second spoiler is arranged between the second nozzle interface and the third nozzle interface.

12. The burner according to claim 6, characterized in that The first nozzle has a first damper connecting section, and the first damper is threadedly connected to the first damper connecting section; the second nozzle has a second damper connecting section, and the second damper is threadedly connected to the second damper connecting section; the third nozzle has a third damper connecting section, and the third damper is threadedly connected to the third damper connecting section.

13. The burner according to claim 12, characterized in that The first damper, the second damper and the third damper are all circular plates, and the diameter of the first damper is larger than the diameter of the first injection inlet, the diameter of the second damper is larger than the diameter of the second injection inlet, and the diameter of the third damper is larger than the diameter of the third injection inlet.

14. A stove, characterized in that: The invention comprises a burner according to any one of claims 1 to 13.

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