Diffusion type gas burner

Abstract

The invention relates to the technical field of combustors, in particular to a diffusion type gas combustor which comprises a combustor body and a blast device arranged outside the combustor body, a combustion chamber and a control knob are arranged on the combustor body, and a main gas supply pipeline is communicated with the interior of the combustion chamber; a control knob is arranged in the combustion chamber, a main gas supply pipeline is arranged in the combustion chamber, a first valve connected with the control knob is arranged on the main gas supply pipeline, a fire distribution device, an ignition device and an ever-burning fire device are arranged in the combustion chamber, and a timing cut-off device is arranged in the ever-burning fire device. Meanwhile, the control device drives the timing cut-off device to open a fuel gas introduction channel of the ever-burning fire device, the blast equipment introduces air into the combustion chamber to be mixed with the fuel gas, then the ignition device ignites the ever-burning fire device to form ever-burning fire so as to ignite the mixed gas, and after cooking is finished and the main gas supply pipeline is closed, the main gas supply pipeline is opened. The timing cut-off device can turn off the ever-burning fire device after preset time, and the problem of fire disasters caused by unattended operation is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of burners, and in particular to a diffusion type gas burner. Background Art

[0002] Gas burners are divided into natural gas burners, city gas burners, etc., and the fuels are mainly oil and gas. Among them, gas stoves are also a type of gas burner.

[0003] The traditional burner structure adopts an integrated main gas and pilot flame gas, that is, they share a common pipeline, and adopt a method of premixing air and gas and then inputting them into the combustion chamber for combustion, that is, a diffusion-type flame stabilization method is adopted, which belongs to a diffusion-type burner. The gas valve of this type of burner cannot be flexibly adjusted. When the gas valve is adjusted to a small level, the fire is easy to go out. If the fire is not extinguished, the gas valve opening needs to be kept large, which will cause a waste of gas, and a large amount of mixed gas accumulates in the combustion chamber. Since the pilot flame is externally arranged in the combustion chamber, there is a time difference in igniting the mixed gas, which is prone to the problem of pan explosion. The existing utility model patent with patent announcement number CN210624517U discloses a diffusion burner, which controls the main gas and the pilot flame gas with separate independent pipelines, and the pilot flame pipe is built into the combustion chamber, so that the valve controlling the main gas pipe can flexibly adjust the gas flow or close it, and there is no need to worry about the pilot flame in the pilot flame pipe going out, and it will not cause a waste of gas.

[0004] However, the patent solution still has the following problems: it is a burner used for cooking, and the ever-open flame will not be extinguished until the valve is completely disconnected. After the operator extinguishes the main fire of the burner and does not carry out the next cooking, if the valve of the fire gas pipe is not closed, the ever-open flame will continue to burn, which may easily lead to a fire when no one is present or watching. Summary of the invention

[0005] The purpose of the present invention is to provide a diffusion-type gas burner, which solves the technical problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0007] A diffusion-type gas burner, comprising a burner body and an air blowing device arranged outside the burner body, wherein the burner body is provided with a combustion chamber and a control knob, and the air blowing device is used to introduce air into the combustion chamber, the combustion chamber is connected with a main gas supply pipeline, and the main gas supply pipeline is provided with a first valve connected with the control knob, the combustion chamber is provided with an ignition distribution device, an ignition device and a long-lasting flame device, and the ignition distribution device is connected with the main gas supply pipeline, the ignition device is electrically connected with the control knob, the long-lasting flame device can introduce gas and maintain flame combustion after ignition, and the amount of gas introduced by the long-lasting flame device in the same time is less than the amount of gas introduced by the main gas supply pipeline, the long-lasting flame device is provided with a timed cut-off device for cutting off the gas introduced into the long-lasting flame device, and the timed cut-off device is connected with a control device connected with the control knob;

[0008] The control knob can be pressed and rotated at the same time, and the control device opens the timing cut-off device through the pressing and rotating action of the control knob, and restricts the timing cut-off device from resetting, and after the control knob is reset, the control device releases the restriction on the timing cut-off device.

[0009] As a preferred embodiment of the present invention, the long-burning flame device includes a branch air intake pipe connected to the outer bottom of the combustion chamber, a maintenance pipe is arranged on the branch air intake pipe, a combustion cap is arranged on the top of the maintenance pipe, flame holes are opened on the surrounding side of the combustion cap, and the timing cut-off device is arranged on the branch air intake pipe.

[0010] As a preferred solution of the present invention, the timing cut-off device includes a mounting seat arranged on the outer wall of the branch air intake pipe and a vertical plate arranged vertically on the mounting seat, the mounting seat is provided with a steering drive structure, one end of the steering drive structure is provided with a closing component for closing the branch air intake pipe, the other end of the steering drive structure is connected to a damping member slidably connected to the vertical plate, and the damping member has damping when sliding and can automatically reset, the damping member is connected to the control device, and when the control knob is released after being pressed and rotated, the control device and the damping member perform up and down lifting and lowering movements, and the steering drive structure is used to adjust the movement direction of the control device and then drive the closing component to move.

[0011] As a preferred solution of the present invention, the steering drive structure includes two supports arranged on a mounting seat, the two supports are connected to a connecting shaft for common rotation, a first gear and a second gear are fixedly connected to the connecting shaft, and the size of the first gear is larger than that of the second gear, the first gear is meshed with a first rack slidably connected to the mounting seat, and the closing assembly is connected to the first rack, and the second gear is meshed with a second rack connected to the damping member.

[0012] As a preferred scheme of the present invention, the closing component includes a slide plate slidably connected to the first rack, a fixing spring connected to the first rack is arranged on one side of the slide plate, a sliding groove is provided on the mounting seat, and the slide plate is slidingly and sealingly connected in the sliding groove, a sealing plate is provided at the end of the slide plate, and one end of the sealing plate is semicircular, an annular groove is provided on the inner side wall of the branch air intake pipe, and one side of the annular groove is connected to the outside of the branch air intake pipe, the sealing plate is slidingly and sealingly connected to the annular groove and is used to close the branch air intake pipe, and a sealing seat slidingly and sealingly connected to the sealing plate is provided on the mounting seat, and the sealing seat is connected to the outer wall of the branch air intake pipe.

[0013] As a preferred solution of the present invention, the damping member includes a damping block slidably connected to the vertical plate, and the damping block has damping when sliding, one end of the damping block is provided with a return spring connected to the vertical plate, and the other end of the damping block is connected to the second rack, the damping block is provided with a connecting plate passing through the return spring, and the connecting plate is connected to the control device.

[0014] As a preferred solution of the present invention, the control device includes a connecting seat arranged on the burner body, a ring plate connected to the connecting plate is slidably connected to the connecting seat, a notch is arranged on the ring plate, an extension column located in the center of the ring plate is arranged at the bottom of the control knob, and a pressure plate is arranged on the outer wall of the extension column.

[0015] As a preferred solution of the present invention, when the control knob is pressed, the height of the pressing plate is smaller than the height of the bottom of the annular plate.

[0016] As a preferred solution of the present invention, when the control knob is not pressed, the pressure plate is located in the notch.

[0017] As a preferred solution of the present invention, the pressure plate is provided with balls for contacting the bottom of the annular plate.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention controls the air intake of the main gas supply pipeline by controlling the control knob, and at the same time, drives the timing cut-off device through the control device to open the passage for the fuel gas to be introduced into the pilot flame device, and the blast device introduces air and fuel gas into the combustion chamber for mixing, and then the pilot flame device is ignited by the ignition device to form a pilot flame to ignite the mixed gas, which can not only ensure that the cooking temperature meets the requirements, but also can use the pilot flame to quickly ignite the mixed gas when the fuel gas is introduced into the main gas supply pipeline, thus avoiding the problem of explosion of the pot, and after finishing cooking and closing the main gas supply pipeline, the timing cut-off device can close the pilot flame device after a predetermined time, thus avoiding the problem of fire caused by unattended operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0021] Figure 1 A structural schematic diagram of a diffusion-type gas burner from a first perspective is provided for an embodiment of the present invention;

[0022] Figure 2 A structural schematic diagram of a diffusion-type gas burner from a second viewing angle is provided for an embodiment of the present invention;

[0023] Figure 3 A structural schematic diagram of a diffusion-type gas burner from a third perspective is provided for an embodiment of the present invention;

[0024] Figure 4 A partial structural schematic diagram of a diffusion-type gas burner is provided for an embodiment of the present invention;

[0025] Figure 5 for Figure 4 A schematic cross-sectional view of a structure;

[0026] Figure 6 for Figure 3 A schematic diagram of the structure enlargement of part A shown in FIG.

[0027] Figure 7 A structural schematic diagram of a branch air intake pipe is provided for an embodiment of the present invention.

[0028] In the figure:

[0029] 1. Burner body; 2. Combustion chamber; 3. Main gas supply pipeline; 4. Fire distribution device; 5. Ignition device; 6. Long-lasting flame device; 7. Timed cut-off device; 8. Control knob; 9. Control device;

[0030] 601, branch air intake pipe; 602, maintenance pipe; 603, combustion cap; 604, flame hole; 701, mounting seat; 702, vertical plate; 703, steering drive structure; 704, closing assembly; 705, damping member; 706, support; 707, connecting shaft; 708, first gear; 709, second gear; 710, first rack; 711, second rack; 712, slide plate; 713, slide groove; 714, sealing plate; 715, annular groove; 716, damping block; 717, return spring; 718, connecting plate; 719, fixing spring; 720, sealing seat; 901, connecting seat; 902, annular plate; 903, extension column; 904, pressure plate; 905, ball; 906, notch. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] like Figures 1 to 7 As shown, the present invention provides a diffusion-type gas burner, comprising a burner body 1 and an air blowing device arranged outside the burner body 1, the burner body 1 is provided with a combustion chamber 2 and a control knob 8, and the air blowing device is used to introduce air into the combustion chamber 2, the combustion chamber 2 is connected with a main gas supply pipeline 3, and the main gas supply pipeline 3 is provided with a first valve connected with the control knob 8, the combustion chamber 2 is provided with an ignition device 4, an ignition device 5 and a long-lasting flame device 6, and the ignition device 4 is connected with the main gas supply pipeline 3, the ignition device 5 is electrically connected with the control knob 8, the long-lasting flame device 6 can introduce gas and maintain flame combustion after ignition, and the amount of gas introduced into the long-lasting flame device 6 within the same time is less than the amount of gas introduced into the main gas supply pipeline 3, the long-lasting flame device 6 is provided with a timing cut-off device 7 for cutting off the gas introduced into the long-lasting flame device 6, and the timing cut-off device 7 is connected with a control device 9 connected with the control knob 8.

[0033] Among them, the control knob 8 can be pressed and rotated at the same time. The control device 9 opens the timing cut-off device 7 through the pressing and rotating action of the control knob 8, and limits the resetting of the timing cut-off device 7. After the control knob 8 is reset, the control device 9 releases the restriction on the timing cut-off device 7.

[0034] In actual use of the present application, when the control knob 8 is pressed down and rotated, the first valve on the main gas supply pipe 3 is opened, and the opening and closing degree of the first valve is adjusted by rotating the control knob 8, so as to adjust the amount of gas introduced into the main gas supply pipe 3, thereby realizing the regulation of the size of the flame generated by the burner body 1 to adjust the heat required for cooking. The gas introduced into the main gas supply pipe 3 is dispersed through the flame distribution device 4 and then enters the combustion chamber 2, and the blowing equipment introduces air into the combustion chamber 2 to mix with the gas to form a mixed gas.

[0035] When the control knob 8 is pressed downward and rotated, the control device 9 is driven by the control knob 8 to open the timing cut-off device 7, so that the passage for the fuel gas to enter the long-lasting flame device 6 is opened, and the ignition device 5 is simultaneously started and ignites the long-lasting flame device 6 to form a long-lasting flame. The long-lasting flame ignites the mixed gas, and the ignited flame is dispersed by the fire distribution device 4 and passed into the outside of the combustion chamber 2 to form a uniform flame.

[0036] During the cooking process, if the first valve is closed by controlling the knob 8, the main gas supply pipe 3 stops providing gas and the flame goes out. When the first valve is opened again, the long-lasting flame generated by the long-lasting flame device 6 can directly ignite the gas and air that have just been mixed, avoiding the problem of excessive mixed gas gathering in the combustion chamber 2 and causing the pot to explode.

[0037] After cooking is finished and the burner is left unattended, the control knob 8 is reset, and the control device 9 releases the restriction on the timing cut-off device 7. The timing cut-off device 7 automatically cuts off the gas supply channel of the ever-open flame device 6 after a preset time, thereby extinguishing the ever-open flame, avoiding the problem of fire when unattended and ensuring safety of use.

[0038] In the present application, the timing cut-off device 7 generates corresponding movement by pressing and rotating the control knob 8. There is no access and control of electronic components, which ensures the stability of the entire control process and does not require additional power supply. It not only avoids the instability caused by electronic control, but also avoids the problem of affecting the safety of gas use due to the operation of electronic components.

[0039] In this embodiment, the control knob 8 refers to the knob for ignition on existing gas stoves and other equipment, and the ignition device 4 and the ignition device 5 refer to a diffusion burner disclosed in the utility model patent with patent announcement number CN210624517U. The specific ignition device 4 refers to the ignition spikes and notches in the utility model patent, and the ignition device 5 refers to the ignition needle in the utility model patent. All of them are prior art, and the technical principles will not be elaborated on here.

[0040] The long-burning flame device 6 includes a branch air intake pipe 601 connected to the outer bottom of the combustion chamber 2, a maintenance pipe 602 is arranged on the branch air intake pipe 601, a combustion cap 603 is arranged on the top of the maintenance pipe 602, flame holes 604 are opened on the surrounding side of the combustion cap 603, and a timing cut-off device 7 is arranged on the branch air intake pipe 601.

[0041] The fuel gas enters the maintenance tube 602 through the branch air inlet pipe 601 and then enters the combustion cap 603. The fuel gas passing through the flame hole 604 is ignited by the ignition device 5 to form a long-lasting flame.

[0042] The timing cut-off device 7 includes a mounting base 701 arranged on the outer wall of the branch air inlet pipe 601 and a vertical plate 702 arranged vertically on the mounting base 701, and a steering drive structure 703 is arranged on the mounting base 701. One end of the steering drive structure 703 is provided with a closing component 704 for closing the branch air inlet pipe 601, and the other end of the steering drive structure 703 is connected to a damping member 705 which is slidably connected to the vertical plate 702, and the damping member 705 has damping when sliding and can automatically reset. The damping member 705 is connected to the control device 9, and when the control knob 8 is released after being pressed and rotated, the control device 9 and the damping member 705 move up and down, and the steering drive structure 703 is used to adjust the movement direction of the control device 9 and then drive the closing component 704 to move.

[0043] The control knob 8 is pressed downward and rotated to adjust the size of the burner flame, and then the control knob 8 is released so that it is reset upward (the angle that has been rotated remains unchanged). The control device 9 moves upward synchronously under the action of the upward movement force of the control knob 8, thereby driving the damping member 705 to move upward. The movement of the damping member 705 is transmitted to the steering drive structure 703, and the steering drive structure 703 adjusts the movement direction transmitted by the damping member 705, thereby driving the closing component 704 to open the branch air inlet pipe 601, so that the long-lasting flame device 6 allows gas to be introduced to form a long-lasting flame after being ignited by the ignition device 5.

[0044] After the control knob 8 is completely reset (rotated to the initial position and released), the control device 9 moves downward, and the damping member 705 will slowly reset under the action of damping. This reset process will last for a long time, that is, the damping member 705 will reset after a preset time, so that the steering drive structure 703 gradually drives the closing component 704 to move during this time until the closing component 704 closes the branch air inlet pipe 601, so that after cooking is finished and the burner is unattended, the long open flame can be automatically extinguished, avoiding the occurrence of fire.

[0045] The steering drive structure 703 includes two supports 706 arranged on the mounting base 701, and the two supports 706 are connected to a connecting shaft 707 for rotation together. The connecting shaft 707 is fixedly connected to a first gear 708 and a second gear 709, and the size of the first gear 708 is larger than the size of the second gear 709. The first gear 708 is meshed with a first rack 710 that is slidably connected to the mounting base 701, and the closing component 704 is connected to the first rack 710, and the second gear 709 is meshed with a second rack 711 connected to the damping member 705.

[0046] When the damping member 705 moves up and down, it drives the second rack 711 to move up and down synchronously, causing the second gear 709 to rotate, thereby driving the connecting shaft 707 to drive the first gear 708 to rotate, and then driving the first rack 710 to slide on the mounting seat 701, thereby driving the closing component 704 to move to close or open the branch intake pipe 601.

[0047] Since the size of the first gear 708 is larger than that of the second gear 709 , when the connecting shaft 707 rotates a certain angle, the first gear 708 can drive the first rack 710 to move a longer distance, ensuring that the closing component 704 can completely close the branch intake pipe 601 .

[0048] The closing component 704 includes a slide plate 712 which is slidably connected to the first rack 710, and a fixing spring 719 connected to the first rack 710 is arranged on one side of the slide plate 712. A slide groove 713 is provided on the mounting seat 701, and the slide plate 712 is slidably and sealedly connected in the slide groove 713. A sealing plate 714 is provided at the end of the slide plate 712, and one end of the sealing plate 714 is semicircular. An annular groove 715 is provided on the inner side wall of the branch air intake pipe 601, and one side of the annular groove 715 is connected to the outside of the branch air intake pipe 601. The sealing plate 714 is slidably and sealingly connected to the annular groove 715 and is used to close the branch air intake pipe 601. A sealing seat 720 which is slidably and sealingly connected to the sealing plate 714 is provided on the mounting seat 701, and the sealing seat 720 is connected to the outer wall of the branch air intake pipe 601.

[0049] The slide plate 712 slides in the slide groove 713 driven by the first rack 710 , thereby driving the sealing plate 714 to slide in the annular groove 715 , thereby closing or opening the branch air intake pipe 601 .

[0050] In order to ensure that the gas does not leak when the sealing plate 714 slides along the annular groove 715 to the outside of the branch air inlet pipe 601, the space above the sealing plate 714 is closed by the sealing seat 720, and the sealing plate 714 is connected to the slide groove 713 in a sliding seal, thereby avoiding gas leakage and ensuring safety of use.

[0051] The fixed spring 719 drives the slide plate 712 to move when the first rack 710 moves, so that after the sealing plate 714 is completely in contact with the inner wall of the annular groove 715 and closes the branch air intake pipe 601, the first rack 710 can continue to move and compress the fixed spring 719, which ensures that the first rack 710 can continue to move without being hindered by the sealing plate 714 and ensures that the branch air intake pipe 601 can be closed.

[0052] The damping member 705 includes a damping block 716 slidably connected to the vertical plate 702, and the damping block 716 has damping when sliding, one end of the damping block 716 is provided with a return spring 717 connected to the vertical plate 702, and the other end of the damping block 716 is connected to the second rack 711, and a connecting plate 718 passing through the return spring 717 is provided on the damping block 716, and the connecting plate 718 is connected to the control device 9.

[0053] When the control knob 8 drives the control device 9 to move upward, the control device 9 drives the damping block 716 to slide upward along the vertical plate 702 through the connecting plate 718 and compresses the return spring 717. The damping block 716 drives the closing component 704 to open the branch air intake pipe 601 through the steering drive structure 703.

[0054] After the control knob 8 is fully reset, the damping block 716 moves downward in the opposite direction under the elastic force of the reset spring 717. The damping block 716 has damping during movement, so the damping block 716 will not be fully reset until a period of time has passed, so that the closing component 704 will not close the branch air intake pipe 601 until a period of time has passed, which not only ensures that the long-lasting flame device 6 maintains the long-lasting flame in a short period of time, but also ensures that the long-lasting flame device 6 can automatically extinguish the long-lasting flame when it is not operated for a long time, thereby improving the safety of use.

[0055] The control device 9 includes a connecting seat 901 arranged on the burner body 1, and a ring plate 902 connected to the connecting plate 718 is slidably connected to the connecting seat 901, and a notch 906 is arranged on the ring plate 902. An extension column 903 located in the center of the ring plate 902 is arranged at the bottom of the control knob 8, and a pressure plate 904 is arranged on the outer wall of the extension column 903.

[0056] When the control knob 8 is pressed, the height of the pressing plate 904 is smaller than the height of the bottom of the annular plate 902 .

[0057] When the control knob 8 is not pressed, the pressure plate 904 is located in the notch 906 .

[0058] The pressure plate 904 is located in the notch 906. After the control knob 8 is pressed downward and rotated, the extension column 903 drives the pressure plate 904 to move downward at the notch 906 first, and then rotates synchronously, so that the pressure plate 904 rotates to the bottom of the annular plate 902 and disengages from the notch 906. Then the control knob 8 is released, and the control knob 8 moves upward, driving the extension column 903 and the pressure plate 904 to move upward until they are against the annular plate 902, and squeeze the annular plate 902 to move upward, thereby driving the damping block 716 to move upward through the connecting plate 718, and then controlling the closing component 704 to open the branch air intake pipe 601.

[0059] After the control knob 8 is fully reset, the pressure plate 904 is located in the notch 906. At this time, the annular plate 902 lacks the restriction of the pressure plate 904, so that the damping block 716 can automatically reset under the elastic force of the reset spring 717, so that the ever-burning flame device 6 can automatically extinguish the ever-burning flame after a period of time.

[0060] The pressure plate 904 is provided with a ball 905 for contacting the bottom of the annular plate 902 .

[0061] The ball 905 and the annular plate 902 are in rolling contact, so that the control knob 8 can rotate more smoothly.

[0062] The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and protection scope of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present application.

Claims

1. A diffusion gas burner, comprising a burner body (1) and a blast device arranged outside the burner body (1), characterized in that: The burner body (1) is provided with a combustion chamber (2) and a control knob (8), and the air blowing device is used to introduce air into the combustion chamber (2), the combustion chamber (2) is connected to a main air supply pipeline (3), and the main air supply pipeline (3) is provided with a first valve connected to the control knob (8), the combustion chamber (2) is provided with a fire distribution device (4), an ignition device (5) and a long-open flame device (6), and the fire distribution device (4) is connected to the main air supply pipeline (3), and the The ignition device (5) is electrically connected to the control knob (8); the pilot flame device (6) is capable of introducing gas and maintaining flame combustion after ignition; and the amount of gas introduced by the pilot flame device (6) in the same period of time is less than the amount of gas introduced by the main gas supply pipeline (3); a timer cut-off device (7) is provided in the pilot flame device (6) for cutting off the gas introduced into the pilot flame device (6); and a control device (9) connected to the control knob (8) is connected to the timer cut-off device (7); The control knob (8) can be pressed and rotated at the same time, and the control device (9) opens the timing cut-off device (7) and restricts the timing cut-off device (7) from resetting by pressing and rotating the control knob (8). After the control knob (8) is reset, the control device (9) releases the restriction on the timing cut-off device (7).

2. The diffusion type gas burner according to claim 1, characterized in that: The ever-opening flame device (6) comprises a branch air intake pipe (601) connected to the outer bottom of the combustion chamber (2); a maintenance pipe (602) is arranged on the branch air intake pipe (601); a combustion cap (603) is arranged on the top of the maintenance pipe (602); flame holes (604) are opened on the circumference of the combustion cap (603); and the timing cut-off device (7) is arranged on the branch air intake pipe (601).

3. The diffusion type gas burner according to claim 2, characterized in that: The timing cut-off device (7) comprises a mounting seat (701) arranged on the outer wall of the branch air intake pipe (601) and a vertical plate (702) arranged vertically on the mounting seat (701); a steering drive structure (703) is arranged on the mounting seat (701); one end of the steering drive structure (703) is arranged with a closing component (704) for closing the branch air intake pipe (601); the other end of the steering drive structure (703) is connected to a damping member (705) slidably connected to the vertical plate (702); the damping member (705) has damping when sliding and can automatically reset; the damping member (705) is connected to the control device (9); and when the control knob (8) is released after being pressed and rotated, the control device (9) and the damping member (705) perform up and down lifting movements; the steering drive structure (703) is used to adjust the movement direction of the control device (9) and then drive the closing component (704) to move.

4. The diffusion type gas burner according to claim 3, characterized in that: The steering drive structure (703) includes two supports (706) arranged on the mounting seat (701), and the two supports (706) are connected to a connecting shaft (707) for rotation together. A first gear (708) and a second gear (709) are fixedly connected to the connecting shaft (707), and the size of the first gear (708) is larger than the size of the second gear (709). The first gear (708) is meshed with a first rack (710) that is slidably connected to the mounting seat (701), and the closing component (704) is connected to the first rack (710), and the second gear (709) is meshed with a second rack (711) that is connected to the damping member (705).

5. The diffusion type gas burner according to claim 4, characterized in that: The closing assembly (704) comprises a slide plate (712) slidably connected to the first rack (710), a fixing spring (719) connected to the first rack (710) is arranged on one side of the slide plate (712), a slide groove (713) is provided on the mounting seat (701), and the slide plate (712) is slidably and sealingly connected in the slide groove (713), a sealing plate (714) is arranged at the end of the slide plate (712), and one end of the sealing plate (714) is semicircular, An annular groove (715) is provided on the inner side wall of the branch air intake pipe (601), and one side of the annular groove (715) is connected to the outside of the branch air intake pipe (601). The sealing plate (714) is slidably sealedly connected to the annular groove (715) and is used to close the branch air intake pipe (601). A sealing seat (720) is provided on the mounting seat (701) and is slidably sealedly connected to the sealing plate (714), and the sealing seat (720) is connected to the outer wall of the branch air intake pipe (601).

6. The diffusion type gas burner according to claim 4, characterized in that: The damping member (705) comprises a damping block (716) slidably connected to the vertical plate (702), and the damping block (716) has damping when sliding, one end of the damping block (716) is provided with a return spring (717) connected to the vertical plate (702), and the other end of the damping block (716) is connected to the second rack (711), and the damping block (716) is provided with a connecting plate (718) passing through the return spring (717), and the connecting plate (718) is connected to the control device (9).

7. The diffusion type gas burner according to claim 6, characterized in that: The control device (9) comprises a connection seat (901) arranged on the burner body (1), an annular plate (902) connected to the connection plate (718) is slidably connected to the connection seat (901), a notch (906) is arranged on the annular plate (902), an extension column (903) located at the center of the annular plate (902) is arranged at the bottom of the control knob (8), and a pressure plate (904) is arranged on the outer wall of the extension column (903).

8. The diffusion type gas burner according to claim 7, characterized in that: When the control knob (8) is pressed, the height of the pressing plate (904) is smaller than the height of the bottom of the annular plate (902).

9. The diffusion type gas burner according to claim 7, characterized in that: When the control knob (8) is not pressed, the pressure plate (904) is located in the notch (906).

10. The diffusion type gas burner according to claim 7, characterized in that: The pressing plate (904) is provided with a ball (905) for contacting the bottom of the annular plate (902).

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