Combustion furnace

Abstract

The invention relates to the technical field of combustors, and discloses a combustion furnace which comprises a combustor. Each supporting unit comprises a lifting driving part and a support, the lifting driving parts are in driving connection with the supports, the lifting driving parts can drive the supports to move up and down, and the multiple supporting units are arranged around the combustors. Therefore, the heating state of the cookware can be better controlled, and the heating efficiency of the burner in different fire outlet states can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of burners, in particular to a combustion furnace. Background Art

[0002] A furnace is equipped with a support bracket that supports the pot, allowing the burner to heat the pot from below. Currently, this bracket is typically fixed inside the furnace, elevating the pot to a fixed height. Adjusting the burner's flame output changes the distance the pot is heated, and since the bracket's height remains fixed, adjusting the flame's heating efficiency is difficult. Therefore, a furnace with better control over heating efficiency is urgently needed. Summary of the Invention

[0003] The object of the present invention is to provide a combustion furnace to solve one or more technical problems existing in the prior art and at least provide a beneficial option or create conditions.

[0004] The solution of the present invention to solve its technical problems is:

[0005] A combustion furnace comprises: a burner; a support unit, comprising a lifting drive member and a bracket, wherein the lifting drive member is driven to connect to the bracket and can drive the bracket to move up and down, and a plurality of support units are arranged around the burner.

[0006] When the burner is turned on, the support bracket is moved upward to ensure that the bottom side of the pot is heated by the outer flame of the flame. In this way, the height of the heated pot can be adjusted up and down during use, thereby better controlling the heating state of the pot and improving the heating efficiency of the burner under different firing states.

[0007] As a further improvement of the above technical solution, the burner is connected to an air intake pipe, and a flow controller is provided on the air intake pipe. The flow controller is used to adjust the air volume of the air intake pipe. The multiple lifting drive members are configured to drive the bracket to move up and down according to the air volume of the air intake pipe, wherein the lifting drive member moves downward when the air volume of the air intake pipe decreases; and the lifting drive member moves upward when the air volume of the air intake pipe increases.

[0008] As a further improvement of the above technical solution, the flow controller is a rotary regulating valve, which has a rotatable knob, an adjusting protrusion is connected to the outside of the knob, and a plurality of travel switches are arranged on the rotation path of the adjusting protrusion. Each of the travel switches is electrically connected to a plurality of the lifting drive parts, and the adjusting protrusion can be rotated to turn on any one of the travel switches.

[0009] As a further improvement of the above technical solution, a height detector is provided on the top side of the burner, and the height detector is used to detect the heating distance between the heating surface to be heated by the burner and the burner. The lifting drive can drive the bracket to move upward according to the heating distance.

[0010] As a further improvement of the above technical solution, there are four support units.

[0011] As a further improvement of the above technical solution, the top surface of the bracket is inclined downward in a direction close to the burner, and a plurality of first latching teeth are provided on the top surface of the bracket in a direction close to the burner.

[0012] As a further improvement of the above technical solution, the bracket is rotatably connected to a support member near the top corner of the burner, and the support member can be rotated to the top side of the bracket or rotated to tilt downward toward the burner.

[0013] As a further improvement of the above technical solution, a limiting portion protruding upward is formed on a side of the bracket away from the burner.

[0014] As a further improvement of the above technical solution, the limiting portion is provided with a limiting concave angle close to the top corner of the burner.

[0015] As a further improvement of the above technical solution, a plurality of second latching teeth are provided on the top surface of the support member in a direction close to the burner.

[0016] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly describes the drawings required for describing the embodiments. Obviously, the drawings described only illustrate some embodiments of the present invention, not all of them. Those skilled in the art can derive other design solutions and drawings based on these drawings without inventive effort.

[0018] Figure 1 It is a schematic diagram of the connection structure between the burner and the support unit of the present invention.

[0019] Figure 2 It is a schematic diagram of the coordinated structure of the rotary control valve and the travel switch of the present invention.

[0020] Figure 3 This is a schematic diagram of switching between usage states of the second embodiment of the bracket of the present invention.

[0021] Figure 4 This is a schematic diagram of the internal ventilation structure of the gas distribution valve of the present invention. Figure 1 , where the arrows indicate the direction of airflow.

[0022] Figure 5 This is a schematic diagram of the internal ventilation structure of the gas distribution valve of the present invention. Figure 2 , where the arrows indicate the direction of airflow.

[0023] Figure 6 3 is a top view of the burner of the present invention, wherein the dotted lines indicate the partition plate, the first guide vane and the second guide vane, and the arrows indicate the airflow direction.

[0024] Figure 7 Schematic diagram of the internal structure of the first ejector tube of the present invention, wherein the arrows indicate the direction of airflow.

[0025] In the figure: 100-burner, 110-inlet pipe, 120-flow controller, 121-adjusting protrusion, 130-travel switch, 140-height detector, 210-lifting drive member, 220-bracket, 221-first latch, 230-support, 231-second latch, 232-limiting part, 233-limiting concave angle, 310-first fire hole, 320-second fire hole, 330-first ejector pipe, 331-first mixing tube, 332 -first straight section, 333-first narrowing section, 334-first connecting rib, 335-first guide groove, 340-second ejector pipe, 350-partition plate, 360-first guide plate, 370-second guide plate, 410-gas distribution valve, 411-valve seat, 412-valve core, 413-first channel, 414-first flow channel, 415-second channel, 416-second flow channel, 420-air inlet pipe, 430-first air distribution pipe, 440-second air distribution pipe. DETAILED DESCRIPTION

[0026] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0027] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0028] In the description of the present invention, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0029] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0030] Reference Figure 1 A combustion furnace includes a burner 100 and a support unit, wherein the support unit includes a lifting drive 210 and a bracket 220, the lifting drive 210 drivingly connected to the bracket 220, the lifting drive 210 can drive the bracket 220 to move up and down, and the lifting drive 210 has various structural forms, such as a hydraulic cylinder or a screw rod, etc. Naturally, due to the high ambient temperature used, the lifting drive 210 needs to use high-temperature resistant materials, for example, a high-temperature resistant electric screw rod can be used, and the support unit is provided with multiple ones around the burner 100.

[0031] As can be seen from the above, when in use, the pot to be heated is placed on the bracket 220 of the multiple support units, and the burner 100 heats the pot. When the heating temperature of the pot is lowered according to the need of use, in addition to reducing the burning of the burner 100, the bracket 220 can be driven upward by the lifting drive member 210 to move the pot away from the flame. At this time, the efficiency of the burner 100 heating the pot is reduced. When the efficiency of the burner 100 heating the pot needs to be improved, the bracket 220 can be driven upward by the lifting drive member 210 to move the pot away from the flame. The height is adjusted in the up and down directions so that the bottom side of the pot is close to the outer flame position of the flame. For example, when the fire of the burner 100 decreases, the lifting drive 210 drives the bracket 220 to move downward. When the fire of the burner 100 increases, the lifting drive 210 drives the bracket 220 to move upward, thereby ensuring that the outer flame of the flame is used to heat the bottom side of the pot. In this way, the height of the heated pot can be adjusted up and down during use, thereby better controlling the heating state of the pot and helping to improve the heating efficiency of the burner 100 under different fire states.

[0032] When the ignition state of the burner 100 changes, the lifting drive member 210 can be adjusted according to the size of the flame. In the present embodiment, the lifting drive member 210 is adjusted according to the air supply to the burner 100. Specifically, the burner 100 is connected to an air inlet pipe 110, and the air inlet pipe 110 is used to supply gas. A flow controller 120 is provided on the air inlet pipe 110, and the flow controller 120 is used to adjust the ventilation volume of the air inlet pipe 110. The plurality of lifting drive members 210 are configured to drive the bracket 220 to move up and down according to the ventilation volume of the air inlet pipe 110, wherein the lifting drive member 210 moves downward when the ventilation volume of the air inlet pipe 110 decreases; and the lifting drive member 210 moves upward when the ventilation volume of the air inlet pipe 110 increases. When the flow controller 120 adjusts the ventilation volume of the air inlet pipe 110 to be smaller, the flame of the burner 100 is smaller. At this time, the lifting drive 210 drives the bracket 220 to move downward, lowering the height of the supported pot, so that the heating surface of the bottom side of the pot is close to the outer flame position of the flame. When the flow controller 120 adjusts the ventilation volume of the air inlet pipe 110 to be larger, the flame of the burner 100 is larger. At this time, the lifting drive 210 drives the bracket 220 to move upward, raising the height of the supported pot, so that the heating surface of the bottom side of the pot adjusts its position to the flame with greater strain. In this way, the height of the bracket 220 is adjusted according to the ventilation volume of the air inlet pipe 110, so as to better control the efficiency of the burner 100 in heating the pot.

[0033] The flow controller 120 is mainly used to adjust the ventilation volume of the air inlet pipe 110, and can be a linear movable adjustment. In this embodiment, Figure 2As shown, the flow controller 120 is a rotary regulating valve having a rotatable knob, an adjusting protrusion 121 being connected to the outside of the knob, a plurality of travel switches 130 being provided on the rotation path of the adjusting protrusion 121, each of the travel switches 130 being electrically connected to a plurality of the lifting drive members 210, and the adjusting protrusion 121 being rotatable to turn on any one of the travel switches 130. When the rotary regulating valve is in use, the amount of gas passing through the intake pipe 110 can be adjusted by turning its knob, and a plurality of travel switches 130 are provided on the rotation path of the knob. In actual application, when each travel switch 130 is turned on, it can respectively correspond to the lifting drive member 210 to drive the bracket 220 to move to different heights. When the adjustment protrusion 121 is rotated to any travel switch 130, the travel switch 130 can be turned on. At this time, the plurality of lifting drive members 210 respectively drive the bracket 220 to move to the corresponding height. In this way, when the amount of gas in the intake pipe 110 is adjusted by the knob, the height of the bracket 220 can also be adjusted accordingly, thereby improving the efficiency of the burner 100 in ignition and heating.

[0034] When the cookware needs to be heated, since the bottom surfaces of different cookware have different shapes, such as arc-shaped or flat, the distance between the flame and the burner 100 is also different. In order to better adapt to different cookware, in this embodiment, a height detector 140 is provided on the top side of the burner 100. The height detector 140 is used to detect the heating distance between the heating surface of the burner 100 to be heated and the burner 100. The height sensor is a high-temperature resistant sensor. The lifting drive 210 can drive the bracket 220 to move upward according to the heating distance. When the cookware is placed on the bracket 220, the height sensor measures the distance between the position of the cookware and the position facing the burner 100 and the top side of the burner 100. When the bottom surface of the cookware is flat, the heating surface of the cookware is coplanar with the plane where the top side of the bracket 220 is located; when the bottom surface of the cookware is arc-shaped, the heating surface of the cookware is lower than the plane where the top side of the bracket 220 is located. The height detector 140 measures the position of the lowest point of the cookware, thereby calculating the distance between the ignition position of the burner 100 and the position of the cookware facing the burner 100, and this distance is also the heating distance. Then, the lifting drive 210 can drive the bracket 220 to move upward, and the amount of movement is the heating distance. In this way, the downward movement of the position of the cookware facing the ignition position of the burner 100 relative to the bracket 220 can be compensated. When the ventilation volume of the air inlet pipe 110 changes, the lifting drive 210 can also accurately adjust the height of the bracket 220, thereby improving the versatility of heating cookware of different shapes.

[0035] The cookware mainly relies on the brackets 220 in the support units to provide support for it. The number of support units can be between three and five. For example, there are four support units. At this time, the brackets 220 in the four support units provide support from the front and back and left and right positions of the cookware, so that the cookware can be placed stably.

[0036] As a first embodiment of the support 220 supporting the cookware, the top surface of the support 220 is tilted downward in a direction approaching the burner 100, and a plurality of first latching teeth 221 are provided on the top surface of the support 220 in the direction approaching the burner 100. When the cookware is placed on the top surface of the support 220, the downward tilt of the top surfaces of the multiple supports 220 in the direction approaching the burner 100 forms a space that narrows toward the burner 100, making it convenient to quickly place the cookware in place. The first latching teeth 221 on the top surface of the support 220 can be used to clamp and limit the bottom corners of the cookware, thereby improving the stability of the cookware placement.

[0037] As a second embodiment of the support 220 for the cookware, Figure 3 As shown, the top corner of the bracket 220 near the burner 100 is rotatably connected to a support member 230. The support member 230 can be rotated to the top side of the bracket 220 or rotated to tilt downward toward the burner 100. During use, the pot is placed on the multiple brackets 220, and the support members 230 on the brackets 220 are used to abut against the pot to provide support. When the pot is small, the multiple support members 230 are rotated to a position tilted downward toward the burner 100. At this time, the multiple support surfaces are tilted against the outside of the pot to provide limited support, and the direct heat conduction to the pot is increased through the support members 230 themselves. When the pot is large, the multiple support members 230 are rotated upward to the top side of the bracket 220, and the bracket 220 itself supports the support members 230. In this way, by rotating the support members 230 on the bracket 220 to adjust its position, it can adapt to different pot sizes and improve the stability of the pot support.

[0038] When a larger boiler is placed on the support member 230, the support surface abuts against the bottom surface of the boiler. To improve the boiler's positional stability, in this embodiment, an upwardly protruding stopper 232 is formed on the side of the bracket 220 away from the burner 100. A concave angle can be formed between the stopper 232 and the support surface to limit the boiler's position. When a flat-bottomed boiler is placed on top of multiple support members 230, the multiple stoppers 232 can limit the boiler's sidewalls, further improving the stability of the boiler's placement.

[0039] Furthermore, the limiting portion 232 is provided with a limiting concave corner 233 near the top corner of the burner 100. When a larger boiler needs to be placed, the boiler can be placed within the limiting concave corners 233 of the limiting portion 232. In this case, the multiple limiting concave corners 233 are directly used to provide positioning and support for the boiler, further improving the overall versatility.

[0040] To enhance the stability of the support member 230's support surface against the boiler when tilted, in this embodiment, a plurality of second latching teeth 231 are provided on the top surface of the support member 230, along a direction approaching the burner 100. When placing a smaller boiler, the support member 230 can be rotated, and the second latching teeth 231 can be locked onto the bottom surface of the boiler near the corners, further enhancing the stability of the boiler.

[0041] The present invention also includes an accessory component, a burner 100, which is internally divided into a first air mixing chamber and a second air mixing chamber. The top side of the burner 100 is provided with a first fire hole 310 connected to the first air mixing chamber, and a plurality of first fire holes 310 are provided around the center of the burner 100. The top side of the burner 100 is provided with a second fire hole 320 connected to the second air mixing chamber, and a plurality of second fire holes 320 are provided around the center of the burner 100; a gas distribution component can supply air to the first air mixing chamber and / or the second air mixing chamber.

[0042] The multiple first fire holes 310 on the top side of the burner 100 form a first fire zone, and the multiple second fire holes 320 form a second fire zone. During use, the working states of the first fire zone and the second fire zone can be controlled separately according to different usage needs. Specifically, the gas distribution component only supplies gas to the first mixing chamber. At this time, the gas in the first mixing chamber is dispersed outward through the multiple first fire holes 310 and burns only in the area covered by the multiple first fire holes 310; or the gas distribution component only supplies gas to the second mixing chamber. At this time, the gas in the second mixing chamber is dispersed outward through the multiple second fire holes 320 and burns only in the area covered by the multiple second fire holes 320; or the gas distribution component supplies gas to the first mixing chamber and the second mixing chamber at the same time. At this time, the multiple first fire holes 310 and the multiple second fire holes 320 emit gas and burn at the same time, thus forming independently controllable fire zones, which can heat different positions of the cookware separately, thereby adapting to different firepower requirements and improving usage flexibility and thermal efficiency.

[0043] As a specific structural form of the gas distribution component, such as Figure 4 、 Figure 5As shown, in this embodiment, the gas distribution assembly includes a gas distribution valve 410, an air inlet pipe 420, a first air distribution pipe 430 and a second air distribution pipe 440. The gas distribution valve 410 includes a valve seat 411 and a valve core 412 rotatably connected to the valve seat 411. A first channel 413 and a first flow channel 414 perpendicular to and connected to the first channel 413 are provided in the valve seat 411. One end of the first channel 413 is connected to the first gas mixing chamber through the first air distribution pipe 430, and the other end of the first channel 413 is connected to the second gas mixing chamber through the second air distribution pipe 440. The air inlet pipe 420 is connected to the first flow channel 414, and the valve core 412 is located at the intersection of the first channel 413 and the first flow channel 414. The position of the valve core 412 corresponding to the first channel 413 is provided with a second channel 415, and the position of the valve core 412 corresponding to the first flow channel 414 is provided with a second flow channel 416.

[0044] In this embodiment, when the second channel 415 is opposite to the first channel 413 and the second flow channel 416 is opposite to the first flow channel 414, when the air inlet pipe 420 is ventilated, the air flow enters the second flow channel 416 from the first flow channel 414, is divided within the valve core 412 to the two ends of the second channel 415, and flows into the two ends of the first channel 413 respectively, and finally enters the first and second air mixing chambers through the first and second air distribution pipes 430 and 440 respectively. This is a state in which air is supplied to the first and second air mixing chambers at the same time. When it is necessary to supply air only to the first mixing chamber, the valve core 412 is rotated so that the second flow channel 416 is opposite to the first diverter pipe. At this time, one end of the second channel 415 is opposite to the first flow channel 414, and the other end is opposite to the inner wall of the valve seat 411 and is closed. The air inlet pipe 420 is ventilated, and the air flows through the first flow channel 414, the second channel 415, the second flow channel 416, and the first channel 413 in sequence and then enters the first diverter pipe. When it is necessary to supply air only to the second mixing chamber, the valve core 412 is rotated so that the first flow channel 414 is opposite to the second diverter pipe. Flow pipe, at this time, one end of the second channel 415 is opposite to the second flow channel 416, and the other end is opposite to the inner wall of the valve seat 411 and is closed, the air inlet pipe 420 is ventilated, and the air flows through the first flow channel 414, the second channel 415, the second flow channel 416, the first channel 413 in sequence and then enters the second diverter pipe. In actual application, the valve core 412 can also be rotated to change the connecting area between the first flow channel 414 and the second channel 415, thereby changing the air intake volume to achieve the purpose of controlling the size of the fire. For example, the valve core 412 can be rotated to adjust the flow rate. 12 When the communicating area between the first flow channel 414 and the second channel 415 is reduced, the air intake can be reduced, thereby reducing the fire output; conversely, the valve core 412 is rotated to adjust the communicating area between the first flow channel 414 and the second channel 415, which can increase the air intake and thereby increase the fire output; when the entire burner 100 needs to be closed, the valve core 412 is rotated so that the second flow channel 416 is opposite to the inner wall of the valve seat 411 and the first flow channel 414 is opposite to the outer side of the valve core 412, and air cannot be ventilated into the valve core 412 to achieve the closing of the fire output.

[0045] When the air inlet pipe 420 only supplies gas, a structure for introducing air needs to be provided on the burner 100. Specifically, a first ejector pipe 330 is formed on the outside of the burner 100 at a position corresponding to the first mixing chamber, and the first gas distribution pipe 430 is connected to the end of the first ejector pipe 330 away from the burner 100. Naturally, a first air inlet for outside air to enter is provided at the end of the first ejector pipe 330 away from the burner 100, and a second ejector pipe 340 is formed on the outside of the burner 100 at a position corresponding to the second mixing chamber, and the second gas distribution pipe 440 is connected to the end of the second ejector pipe 340 away from the burner 100. Similarly, a second air inlet for outside air to enter is provided at the end of the second ejector pipe 340 away from the burner 100. When the gas is input into the gas inlet pipe 420 and enters the first gas distribution pipe 430, the gas first enters the first ejector pipe 330, mixes with the air entering the first ejector pipe 330, and then is ejected into the first gas mixing chamber for further mixing, thereby improving the mixing effect of the gas and air; similarly, when the gas is input into the gas inlet pipe 420 and enters the second gas distribution pipe 440, the gas first enters the second ejector pipe 340, mixes with the air entering the second ejector pipe 340, and then is ejected into the second gas mixing chamber for further mixing.

[0046] The burner 100 is provided with a structure for separating the internal space, which can be a flat plate. In order to cooperate with the first ejector pipe 330 to intake air into the burner 100 and improve the intake efficiency, Figure 6 As shown, in this embodiment, a partition plate 350 is provided in the burner 100, and the partition plate 350 divides the interior of the burner 100 into the first mixing chamber and the second mixing chamber. The partition plate 350 is located on both sides of the center of the burner 100 to form a first arc portion and a second arc portion respectively. The opening of the first arc portion is opposite to the opening direction of the second arc portion. The exhaust direction of the first ejector pipe 330 is tangent to the side of the first arc portion away from the center of the burner 100, and the exhaust direction of the second ejector pipe 340 is tangent to the side of the second arc portion away from the center of the burner 100. When the first ejector tube 330 supplies the mixed gas into the first mixing chamber and the second ejector tube 340 supplies the mixed gas into the second mixing chamber, since the gas outlet direction of the first ejector tube 330 is tangent to the side of the first arc-shaped portion away from the center of the burner 100 and the gas outlet direction of the second ejector tube 340 is tangent to the side of the second arc-shaped portion away from the center of the burner 100, the mixed gas can flow along the first arc-shaped portion and the second arc-shaped portion, which is conducive to the mixed gas smoothly entering the first mixing chamber and the second mixing chamber, and forming a rotating airflow in the first mixing chamber and the second mixing chamber, thereby enhancing the effect of further diffusion and mixing of the mixed gas in the first mixing chamber and the second mixing chamber.

[0047] To further enhance the diffusion and mixing of the mixed gas within the first mixing chamber, in this embodiment, a first guide vane 360 ​​is provided within the first mixing chamber. One side of the first guide vane 360 ​​faces the first ejector tube 330, while the other side of the first guide vane 360 ​​extends to the center of the first mixing chamber and is arranged in a spiral pattern. A guide gap is formed between the first guide vane 360 ​​and the first curved portion. When the mixed gas enters the first mixing chamber, some of it enters the guide gap and flows to a position near the second curved portion of the first mixing chamber. Others, guided by the first guide vane 360, flow to the center of the first mixing chamber. Further upward, the mixed gas rises and mixes as the spiral first guide vane 360 ​​rotates. As the mixed gas flows upward out of the first guide vane 360 ​​and toward the inner top of the first mixing chamber, it is dispersed and distributed in all directions. This facilitates further mixing of the mixed gas within the first mixing chamber and allows it to be evenly and quickly directed to the multiple first ignition holes 310.

[0048] To further enhance the diffusion and mixing of the mixed gas within the first mixing chamber, in this embodiment, a second guide vane 370 is provided within the second mixing chamber. One side of the second guide vane 370 faces the second ejector tube 340, while the other side of the second guide vane 370 extends to the center of the second mixing chamber and is arranged in a spiral pattern. A guide gap is formed between the second guide vane 370 and the second curved portion. When the mixed gas enters the second mixing chamber, some of it enters the guide gap and flows to a position near the first curved portion of the second mixing chamber. Others, guided by the second guide vane 370, flow to the center of the second mixing chamber. Further upward, the mixed gas rises and mixes as the spiral second guide vane 370 rotates. As the mixed gas flows upward out of the second guide vane 370 and toward the inner top of the second mixing chamber, it is dispersed and distributed in all directions. This facilitates further mixing of the mixed gas within the second mixing chamber and allows it to be evenly and quickly directed to the multiple second ignition holes 320.

[0049] In order to improve the mixing effect of air and gas in the first ejector tube 330, Figure 7 As shown, in this embodiment, a first mixing tube 331 is disposed within the first ejector tube 330. The first mixing tube 331 can generate a swirling airflow within the first ejector tube 330. The swirling airflow can promote premixing of air and combustion within the first ejector tube 330, thereby improving the gas utilization rate and thermal efficiency during the final exhaust.

[0050] There are many ways for the first mixing tube 331 to form a rotating airflow in the first ejector tube 330. For example, a plurality of spirally extending grooves are directly provided on the inner wall of the first ejector tube 330. When the gas and air pass through the grooves, they will be guided to rotate and mix. In order to further improve the efficiency of mixing of air and gas in the first ejector tube 330, in this embodiment, the first ejector tube 330 includes a first straight section 332 and a first narrowed section 333 connected to each other, a first connecting rib 334 is connected between the outer side of the first mixing tube 331 and the inner side of the first straight section 332, a first swirl gap is formed between the first mixing tube 331 and the first straight section 332, a plurality of first guide grooves 335 are provided on the outer side of the first mixing tube 331, and the plurality of first guide grooves 335 extend spirally on the outer side of the first mixing tube 331. When air and gas enter the first straight section 332, part of the mixed gas enters the first mixing tube 331, and part of the mixed gas enters the first swirl gap formed between the outer side of the first mixing tube 331 and the inner side of the first straight section 332. This part of the mixed gas forms an airflow rotating around the outer side of the first mixing tube 331 under the guidance of multiple first guide grooves 335. The first mixing tube 331 is used to spatially separate the mixed gas, so that a laminar flow with a stronger flow rate can be formed on the outer side of the first mixing tube 331, thereby enhancing the disturbance and mixing of the airflow at the outer position. When flowing out of the first swirl gap, the mixed gas in the first mixing tube 331 can also be driven to rotate and mix. When reaching the first narrowed section 333, the swirling mixed gas can be further compressed toward the axis of the first narrowed section 333, thereby enhancing the disturbance and mixing of the mixed gas at the middle position. Finally, it flows out of the first narrowed section 333, forming an airflow with a higher speed and a better mixing effect.

[0051] To enhance the mixing of air and gas within the second ejector tube 340, in this embodiment, a second mixing tube is provided within the second ejector tube 340. The second mixing tube can create a swirling airflow within the second ejector tube 340. The swirling airflow promotes premixing of air and gas within the second ejector tube 340, thereby improving gas utilization and thermal efficiency during final exhaust.

[0052] Similarly, the second mixing tube can form a rotating airflow in the second ejector tube 340 in a variety of ways. For example, a plurality of spirally extending grooves are directly provided on the inner wall of the second ejector tube 340. When the gas and air pass through the grooves, they will be guided to rotate and mix. In order to further improve the efficiency of mixing of air and gas in the second ejector tube 340, in this embodiment, the second ejector tube 340 includes a second straight section and a second narrowed section connected to each other, a second connecting rib is connected between the outer side of the second mixing tube and the inner side of the second straight section, a second swirl gap is formed between the second mixing tube and the second straight section, a plurality of second guide grooves are provided on the outer side of the second mixing tube, and the plurality of second guide grooves extend spirally on the outer side of the second mixing tube. When air and gas enter the second straight section, part of the mixed gas enters the second mixing tube, and part of the mixed gas enters the second swirl gap formed by the outside of the second mixing tube and the inside of the second straight section. This part of the mixed gas forms an airflow rotating around the outside of the second mixing tube under the guidance of multiple second guide grooves. The second mixing tube is used to spatially separate the mixed gas, so that a laminar flow with a stronger flow rate can be formed on the outside of the second mixing tube, and the disturbance and mixing of the airflow at the external position can be enhanced. When flowing out of the second swirl gap, the mixed gas from the second mixing tube can also be driven to rotate and mix. When reaching the second narrowed section, the swirling mixed gas can be further compressed toward the axis of the second narrowed section, so as to enhance the disturbance and mixing of the mixed gas at the middle position, and finally flow out from the second narrowed section, forming an airflow with a higher speed and better mixing effect.

[0053] The above specifically describes the preferred embodiments of the present invention, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A combustion furnace, characterized in that: include: Burner (100); The support unit comprises a lifting drive member (210) and a bracket (220). The lifting drive member (210) is connected to the bracket (220) by driving, and the lifting drive member (210) can drive the bracket (220) to move up and down. A plurality of the support units are arranged around the burner (100).

2. A combustion furnace according to claim 1, characterized in that: The burner (100) is connected to an air intake pipe (110), and a flow controller (120) is provided on the air intake pipe (110). The flow controller (120) is used to adjust the ventilation volume of the air intake pipe (110). The plurality of lifting drive members (210) are configured to drive the bracket (220) to move up and down according to the ventilation volume of the air intake pipe (110), wherein the lifting drive member (210) moves downward when the ventilation volume of the air intake pipe (110) decreases; and the lifting drive member (210) moves upward when the ventilation volume of the air intake pipe (110) increases.

3. A combustion furnace according to claim 2, characterized in that: The flow controller (120) is a rotary regulating valve having a rotatable knob. An adjusting protrusion (121) is connected to the outside of the knob. A plurality of travel switches (130) are provided on the rotation path of the adjusting protrusion (121). Each of the travel switches (130) is electrically connected to a plurality of the lifting drive members (210). The adjusting protrusion (121) can be rotated to conduct any one of the travel switches (130).

4. A combustion furnace according to claim 1, characterized in that: A height detector (140) is provided on the top side of the burner (100), and the height detector (140) is used to detect the heating distance between the heating surface of the burner (100) to be heated and the burner (100). The lifting drive member (210) can drive the bracket (220) to move upward according to the heating distance.

5. A combustion furnace according to claim 1, characterized in that: The number of the supporting units is four.

6. A combustion furnace according to claim 1, characterized in that: The top surface of the bracket (220) is inclined downward in a direction close to the burner (100), and a plurality of first latch teeth (221) are provided on the top surface of the bracket (220) in a direction close to the burner (100).

7. A combustion furnace according to claim 1, characterized in that: The bracket (220) is rotatably connected to a support member (230) at a top corner close to the burner (100), and the support member (230) can be rotated to the top side of the bracket (220) or rotated to tilt downward toward the burner (100).

8. A combustion furnace according to claim 7, characterized in that: A limiting portion (232) protruding upward is formed on a side of the bracket (220) away from the burner (100).

9. A combustion furnace according to claim 8, characterized in that: The limiting portion (232) is provided with a limiting concave angle (233) near the top corner of the burner (100).

10. The combustion furnace according to claim 7, characterized in that: A plurality of second latching teeth (231) are provided on the top surface of the support member (230) in a direction close to the burner (100).

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