A premixed low nitrogen burner

Abstract

The present application discloses a premixed low-nitrogen burner, which belongs to the technical field of burners. It includes a premixing tube for premixing combustion gas; a filtering mechanism, which is arranged on one side of the premixing tube to filter the premixed air; a fan, which is connected to the filter mechanism through a first connecting tube and is arranged on one side of the filter mechanism, and the premixing tube is arranged at the output end of the fan; and a flow sensor is arranged in the first connecting tube; wherein the filtering mechanism includes: a shell, one side of the shell is provided with an air inlet; a filter shell, the filter shell is rotated and arranged in the shell under the drive of the second driving mechanism, and a plurality of filter plates are arranged on the outside of the filter shell, and the gas entering from the air inlet passes through the filter plate and then enters the premixing tube through the first connecting tube; and the second driving mechanism responds to the flow sensor. The present application uses a flow sensor to control the speed of the fan to ensure that the gas will not lose its forward momentum instantly when the second driving mechanism drives the filter plate to replace.

Description

Technical Field

[0001] The present application relates to the technical field of burners, and more specifically, to a premixed low-nitrogen burner. Background Art

[0002] The low-nitrogen burner uses premixed combustion technology, which means that the fuel and air are mixed evenly before combustion; by mixing the fuel and air in advance, the fuel can be completely burned, reducing the unburned fuel residue and thus reducing the generation of NOx.

[0003] In the related art, air needs to be filtered before premixing, and filters and other components are usually used for filtering. In order to prevent the filter components from being blocked by impurities in the air and making it difficult to clean, for example, the patent with the prior art publication number CN118129148A provides a premixed ultra-low nitrogen gas burner. The device can sense the air intake volume per unit time of the air intake frame through a flow sensor. When the air intake volume per unit time of the air intake frame drops to the set lower limit value of the flow sensor, it means that there are more impurities on the first filter or the second filter involved in the work, and then the PLC controller will control the motor to rotate half a circle counterclockwise, and then the inner ring of the one-way bearing drives its outer ring to rotate The first filter screen and the second filter screen are replaced by the second filter screen. Then the PLC controller controls the motor to rotate clockwise again. When the shaft drives the inner ring of the one-way bearing to rotate, the shaft drives the turntable to rotate. At this time, the turntable drives the pressure plate to move back and forth on the inner wall of the pump air frame through the pull rod. The pump air frame intermittently pumps air into the two high-pressure pipes through the one-way suction pipe and the one-way outlet pipe, so that the high-pressure gas can enter the fourth pipe opposite to the two high-pressure pipes. Then the high-pressure gas is ejected from the multiple jet pipes through the multiple fifth pipes to recoil the mesh of the second filter screen and the impurities on the surface to ensure the cleanliness of the second filter screen.

[0004] Although the above-mentioned prior art solution can achieve the effect of replacing the filter by controlling the forward and reverse rotation of the motor, the motor synchronously drives the impeller to rotate so that the impeller can realize the air delivery function. When the motor reverses, it will drive the impeller to reverse. Although the motor rotates in the reverse direction very quickly, it will cause the gas to lose its forward momentum instantly. At this time, the flame is likely to burn the remaining gas, and there is a certain risk of backfire.

[0005] In view of this, we propose a premixed low-nitrogen burner. Summary of the invention

[0006] The purpose of the present application is to provide a premixed low-nitrogen burner, which solves the technical problem of the risk of backfire when the filter component of the motor is replaced, and achieves the technical effect of preventing backfire when the filter component is replaced.

[0007] The present application provides a premixed low-nitrogen burner, comprising:

[0008] Premixing pipe, used for premixing of combustion gases;

[0009] A filtering mechanism is arranged on one side of the premixing pipe to filter the premixing air;

[0010] A fan is connected to one side of the filter mechanism through a first connecting pipe, and a premixing pipe is arranged at an output end of the fan; and a flow sensor is arranged in the first connecting pipe;

[0011] Wherein, the filtering mechanism comprises:

[0012] A housing, wherein an air inlet is provided on one side of the housing;

[0013] A filter shell is rotatably disposed in the outer shell under the drive of a second driving mechanism, and a plurality of filter plates are arranged on the outer side of the filter shell. Gas entering from the air inlet passes through the filter plates and then enters the premixing tube through the first connecting pipe; and the second driving mechanism responds to the flow sensor.

[0014] Preferably, the filtering mechanism further comprises a sealing block, which is arranged between two adjacent filter plates, and the sealing block abuts against the inner wall of the shell.

[0015] Preferably, the fan is driven by a first driving mechanism, and the first driving mechanism responds to the flow sensor;

[0016] Wherein, the first driving mechanism includes a driving motor, and the fan transmission is arranged at the output end of the driving motor.

[0017] Preferably, the driving mechanism comprises:

[0018] A centrifugal clutch is arranged at the output end of the driving motor;

[0019] A gear box is arranged on one side of the driving motor through the centrifugal clutch, the gear box comprises a low-speed shaft, and a driving wheel is arranged on the outer side of the low-speed shaft;

[0020] The passive wheel is connected to one side of the filter housing, and the passive wheel transmission is arranged on one side of the driving wheel.

[0021] Preferably, the driving wheel is a half gear, and the corresponding driven wheel is a gear ring connected to one side of the filter housing.

[0022] Preferably, it also includes a cleaning mechanism, which is used to clean dust attached to the outer side of one of the filter plates;

[0023] Wherein, the cleaning mechanism comprises a cleaner disposed in the filter housing;

[0024] The cleaner comprises:

[0025] A tube body is arranged in the filter housing;

[0026] An air inlet, connected to the tube body and used for introducing air into the tube body;

[0027] The air outlet piece is connected to the pipe body and is used for the pipe body to discharge air outwards, and the air outlet piece is arranged toward a filter plate to be cleaned.

[0028] Preferably, the cleaner further comprises:

[0029] A sealing plate connected to the outer side of the tube body, wherein the outer side of the sealing plate contacts the inner side of the filter housing;

[0030] Wherein, the sealing plate can separate the air inlet component and the air outlet component.

[0031] Preferably, the cleaning mechanism further comprises an air collecting component, and the air collecting component can drive the air inlet and outlet of the tube body;

[0032] Wherein, the gas collecting assembly comprises:

[0033] A moving block is slidably arranged inside the tube body, and when the moving block is driven to move inside the tube body, the tube body can be inhaled through the air inlet member and discharged through the air outlet member;

[0034] The crankshaft is rotatably arranged on one side of the tube body, the crankshaft transmission is arranged on one side of the centrifugal clutch, and the crankshaft is connected to the moving block through a connecting column.

[0035] Preferably, the cleaning mechanism further comprises a dust collector, and the dust collector is connected to the housing through a second connecting pipe;

[0036] Wherein, the dust collector can absorb dust on the corresponding filter plate cleaned by the cleaner when driven by the driving component, and the driving component is transmission-configured at an output end of the gear box.

[0037] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0038] (1) The present application uses a flow sensor to control the speed of the fan to ensure that the gas will not instantly lose its forward momentum when the second drive mechanism drives the filter plate to be replaced, thereby solving the problem of the risk of backfire when the motor is replacing the filter component, and thus achieving the technical effect of preventing backfire when replacing the filter component.

[0039] (2) The present application provides a second driving mechanism on the first driving mechanism side, so that the centrifugal clutch can drive the filter mechanism to replace the filter plate when the fan is at its maximum, thereby ensuring the effect of replacing the filter plate of the equipment and improving the filtering effect of the equipment.

[0040] (3) The present application provides a cleaning mechanism under the bottom filter plate, which can automatically clean the filter plate, thereby increasing the practicality of the equipment, allowing the filter plate to be used alternately and repeatedly, improving the filtering efficiency of the equipment, and improving the use effect of the equipment.

[0041] (4) The present application provides a premixing tube on one side of the fan, so that the air and gas can be premixed in the premixing tube, thereby ensuring the use effect of the premixing equipment, increasing the practicality of the equipment, and ensuring the normal operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a schematic diagram of the overall structure of the premixed low-nitrogen burner disclosed in the embodiment of the present application;

[0043] Figure 2 This is a schematic diagram of the structure of the filtering mechanism in the premixed low-nitrogen burner disclosed in the embodiment of the present application;

[0044] Figure 3 This is a schematic diagram of the structure of the filter housing in the premixed low-nitrogen burner disclosed in the embodiment of the present application;

[0045] Figure 4 This is a schematic diagram of the structure of a flow sensor in a premixed low-nitrogen burner disclosed in an embodiment of the present application;

[0046] Figure 5 It is a schematic diagram of the assembly structure of the first driving mechanism and the second driving mechanism in the premixed low-nitrogen burner disclosed in the embodiment of the present application;

[0047] Figure 6 It is a schematic diagram of the assembly structure of the second driving mechanism and the cleaning mechanism in the premixed low-nitrogen burner disclosed in the embodiment of the present application;

[0048] Figure 7 It is a structural schematic diagram of the cleaning mechanism in the premixed low-nitrogen burner disclosed in the embodiment of the present application;

[0049] Figure 8 This is a schematic diagram of the overall structure of the premixed low-nitrogen burner disclosed in the embodiment of the present application from another perspective;

[0050] Fig. 9 This is a schematic diagram of the explosion structure of the cleaner and gas collecting assembly in the premixed low-nitrogen burner disclosed in the embodiment of the present application.

[0051] Description of the numbers in the figure:

[0052] 1. Mounting seat;

[0053] 2. Filter mechanism; 21. Filter plate; 22. Housing; 2201. Air inlet; 23. Filter housing; 24. Sealing block;

[0054] 3. Fan;

[0055] 4. First connecting pipe;

[0056] 5. Flow sensor;

[0057] 6. First driving mechanism; 61. Driving motor; 62. First belt; 63. First pulley;

[0058] 7. Second driving mechanism; 71. Centrifugal clutch; 72. Mounting plate; 73. Worm; 74. Worm wheel; 75. Gear box; 76. Driving wheel; 77. Driven wheel;

[0059] 8. Control box;

[0060] 9. Cleaning mechanism; 91. Cleaner; 9101. Tube; 9102. Air inlet; 9103. Air outlet; 9104. Sealing plate; 92. Air collecting assembly; 9201. Fixed plate; 9202. Crankshaft; 9203. Connecting column; 9204. Moving block; 93. Driving assembly; 9301. Transmission rod; 9302. Second belt; 9303. Second pulley; 94. Dust collector; 95. Second connecting pipe;

[0061] 10. Premixing tube;

[0062] 11. Sealing block. DETAILED DESCRIPTION

[0063] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0064] Reference below Figure 1-Figure 9 The premixed low nitrogen burner and its working principle recorded in the embodiments of the present application are described.

[0065] Reference Figure 1 , Figure 2 , Figure 4 and Figure 8, the embodiment of the present application discloses a premixed low-nitrogen burner including a mounting base 1, a filter mechanism 2 is fixedly arranged on the top of the mounting base 1, the filter mechanism 2 includes four filter plates 21, and the four filter plates 21 are all used to filter air, a fan 3 is fixedly arranged on the top of the mounting base 1 on one side of the filter mechanism 2, and the fan 3 is used to suck air into the equipment, a first connecting pipe 4 is fixedly arranged between the filter mechanism 2 and the fan 3, a flow sensor 5 is arranged inside the first connecting pipe 4, and the flow sensor 5 is used to detect the air flow, a first driving mechanism 6 is jointly arranged on one side of the filter mechanism 2 and the fan 3, and is used to drive the fan 3 and the second driving mechanism 7 to operate, a second driving mechanism 7 is arranged on the side of the first driving mechanism 6 close to the filter mechanism 2, and is used to drive the filter mechanism 2 to operate, and a control box 8 is arranged on one side of the top of the mounting base 1 for controlling the operation of the first driving mechanism 6.

[0066] The fan 3 is driven to operate by the first driving mechanism 6, and the fan 3 generates a certain suction force on the corresponding filter plate 21 through the first connecting pipe 4, and the air is filtered through the filtering mechanism 2, so that the filtered air is sucked into the equipment by the fan 3 for the next step of premixing. In this process, the flow sensor 5 inside the first connecting pipe 4 always detects the flow rate of the sucked air and transmits the data to the control box 8, so that the control box 8 controls the operation of the first driving mechanism 6. Since dust will adhere to the filter plate 21, the air flow rate will become less and less. The control box 8 controls the first driving mechanism 6 to drive the fan 3, so that the speed of the fan 3 becomes larger, and the suction force on the filter plate 21 is enhanced. , thereby ensuring that the amount of air transported inside the equipment is sufficient. When the speed of the fan 3 reaches a certain level, it drives the second driving mechanism 7 to operate, and the second driving mechanism 7 drives the filter mechanism 2 to replace the filter plate 21. After replacing the filter plate 21, the air flow rate will increase, and the control box 8 controls the first driving mechanism 6 to drive the fan 3 to slow down the speed of the fan 3 to ensure the stability of the internal air transport. It will always maintain power support for the gas to prevent the flame from burning the remaining gas when replacing the filter plate 21, thereby avoiding the risk of backfire when the motor of the existing equipment replaces the filter component, and achieving the technical effect of preventing backfire when replacing the filter component.

[0067] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 The filter mechanism 2 also includes a shell 22, one side of the shell 22 is provided with an air inlet 2201, a filter shell 23 is rotatably arranged inside the shell 22, filter plates 21 are fixedly arranged around the filter shell 23, and sealing blocks 24 are fixedly arranged at the four corners of the filter shell 23, and the sealing blocks 24 are fitted with the interior of the shell 22.

[0068] The filter plate 21 is replaced by rotating the filter shell 23 in the outer shell 22. The sealing block 24 is used to seal the outer shell 22 so that air can only enter the air inlet 2201 of the outer shell 22, thereby ensuring the sealing of the outer shell 22 when in use.

[0069] Reference Figure 1 , Figure 5 and Figure 6 The first driving mechanism 6 includes a driving motor 61, which is fixed to one side of the fan 3. One output end of the driving motor 61 is fixed to the fan 3 through a first belt 62 and a set of first pulleys 63, and the other output end of the driving motor 61 is fixed to the inner side of the second driving mechanism 7.

[0070] A first pulley 63 is driven to rotate by a driving motor 61, thereby driving the first belt 62 to rotate. The first belt 62 drives another first pulley 63 to rotate, thereby driving the fan 3 to operate, so that the fan 3 can suck the air in the filter mechanism 2 into the device through the first connecting pipe 4. At the same time, the driving motor 61 can drive the inner side of the second driving mechanism 7 to rotate. When the rotation of the driving motor 61 reaches a certain speed, it can drive the outer side of the second driving mechanism 7 to rotate.

[0071] Reference Figure 1 and Figure 5 The second driving mechanism 7 includes a centrifugal clutch 71, one side of the centrifugal clutch 71 is fixedly arranged with the first connecting pipe 4 through a mounting plate 72, the inner side of the centrifugal clutch 71 is fixedly arranged with an output end of the driving motor 61, a worm 73 is fixedly arranged on the outer side of the centrifugal clutch 71, the outer side of the worm 73 is meshingly connected with a worm wheel 74, a gear box 75 is fixedly arranged at the bottom of the worm wheel 74, a driving wheel 76 is fixedly arranged on the low-speed shaft of the gear box 75, wherein the driving wheel 76 is a half gear block, the outer side of the driving wheel 76 is meshingly connected with a driven wheel 77, and the driven wheel 77 is a gear ring with one side fixed to one side of the filter shell 23.

[0072] The rotation of the centrifugal clutch 71 can drive the worm 73 to rotate, thereby driving the worm wheel 74 to rotate. The rotation of the worm wheel 74 can drive the gear box 75. The low-speed shaft of the gear box 75 drives the driving wheel 76 to rotate. The driving wheel 76 rotates 180° to drive the driven wheel 77 to rotate 90°, so that the driven wheel 77 drives the filter housing 23 to rotate 90°, thereby completing the effect of replacing the filter plate 21 of the equipment.

[0073] Reference Figure 1 , Figure 6 and Figure 7, and also includes a cleaning mechanism 9, which is used to clean the filter plate 21. The cleaning mechanism 9 includes a cleaner 91, and an air collecting component 92 is provided on one side of the cleaner 91. The air collecting component 92 is used to drive the cleaner 91 to clean the bottom filter plate 21. The cleaning mechanism 9 also includes a driving component 93, and the driving component 93 is used to drive the dust collector 94 to absorb dust. A second connecting pipe 95 is provided on the top of the dust collector 94, and the top of the second connecting pipe 95 is fixed to the bottom of the shell 22.

[0074] The air collecting component 92 drives the cleaner 91 to blow air to the filter plate 21, so that the dust on the bottom filter plate 21 is blown into the dust collector 94 and discharged from the equipment through the dust collector 94. At the same time, the component 93 drives the dust collector 94 to suck in the dust on the filter plate 21 and then discharge it, thereby increasing the effect of the equipment in cleaning the filter plate 21.

[0075] Reference Figure 1 , Figure 7 and Fig. 9 The cleaner 91 includes a tube body 9101, an air inlet piece 9102 is arranged on the outer side of the tube body 9101, an air outlet piece 9103 is arranged at the bottom of the tube body 9101, the air outlet piece 9103 is directly opposite to the filter plate 21 at the bottom, and four sealing plates 9104 are arranged on the outer side of the tube body 9101, and one side of the four sealing plates 9104 is fixed to the inner side of the filter shell 23.

[0076] The cleaner 91 sucks in the air filtered by the filter plate 21 through the air inlet 9102, and then blows out the sucked air through the air outlet 9103 to clean the filter plate 21 at the bottom. The four sealing plates 9104 can seal the inside of the filter shell 23 so that the air inlet 9102 can only suck in the air filtered by the filter plate 21, preventing the top of the bottom filter plate 21 from being covered with dust.

[0077] In the above technical solution, the air inlet member 9102 is a one-way air inlet pipe, and the air outlet member 9103 is a one-way air outlet block, wherein the one-way air outlet block is provided with a plurality of one-way air outlet holes, and the air outlet directions of the one-way air outlet holes are all arranged toward the filter plate 21 to be cleaned.

[0078] Reference Figure 1 , Figure 7 and Fig. 9The gas collecting component 92 includes two fixed plates 9201, and the two fixed plates 9201 are fixedly arranged on one side of the tube body 9101. A crankshaft 9202 is rotatably arranged on one side of the two fixed plates 9201 close to each other, and one end of the crankshaft 9202 is fixedly arranged on one end of the worm 73. A connecting column 9203 is rotatably arranged on one side of the crankshaft 9202, and a moving block 9204 is rotatably connected to one side of the connecting column 9203, wherein the moving block 9204 is slidably arranged in the tube body 9201, and the moving block 9204 and the inner wall of the tube body 9201 are arranged in a sealing structure.

[0079] The crankshaft 9202 is driven to rotate by the worm gear 73, thereby driving the connecting column 9203 to move back and forth. The connecting column 9203 drives the moving block 9204 to move back and forth in the tube body 9201, so that the tube body 9101 can inhale and deflate air through the air inlet piece 9102 and the air outlet piece 9103. The two fixed plates 9201 are used to support the gas collecting assembly 92 to increase the stability of the equipment.

[0080] Reference Figure 1 , Figure 6 and Figure 7 The driving component 93 includes a transmission rod 9301, one end of which is fixed to the high-speed shaft of the gear box 75. The driving component 93 also includes a second belt 9302 and a set of second pulleys 9303, wherein the inner side of one of the second pulleys 9303 is fixed to the other end of the transmission rod 9301, and the outer side of the other second pulley 9303 is fixed to the dust collector 94.

[0081] The high-speed shaft of the gear box 75 drives the transmission rod 9301 to rotate, thereby driving a second pulley 9303 to rotate. The second pulley 9303 drives the second belt 9302 to rotate, thereby driving another second pulley 9303 to rotate, so that it drives the dust collector 94 to operate, so that the dust collector 94 can collect and discharge the dust blown off from one side of the filter plate 21.

[0082] Reference Figure 1 and Figure 4 A premixing tube 10 is fixedly provided on one side of the fan 3, and the premixing tube 10 is used to premix gas and air. A blocking block 11 is provided on one side of the first connecting tube 4 close to the outer shell 22 and on one side of the second connecting tube 95 close to the outer shell 22. The blocking block 11 is arranged in a semicircular shape.

[0083] The premixing pipe 10 can be used to premix the gas and air to achieve the premixing effect of the equipment. The setting of the blocking block 11 can prevent the fan 3 from sucking the unfiltered air in the second connecting pipe 95 into the equipment when the filter shell 23 continues to rotate after rotating 45°, thereby ensuring the stability of the equipment filtration.

[0084] In summary, when the premixed low-nitrogen burner disclosed in the embodiment of the present application is in use, a first pulley 63 is driven to rotate by a driving motor 61, thereby driving a first belt 62 to rotate, and the first belt 62 drives another first pulley 63 to rotate, thereby driving the fan 3 to operate. The fan 3 generates a certain suction force on the corresponding filter plate 21 through the first connecting pipe 4, and filters the air through the filtering mechanism 2, so that the filtered air is sucked into the equipment by the fan 3 for the next step of premixing. In this process, the flow sensor 5 inside the first connecting pipe 4 continuously detects the flow rate of the inhaled air, and transmits the data to the control box 8, so that the control box 8 controls the operation of the first driving mechanism 6. Since dust will adhere to the filter plate 21, the air flow will become less and less. The control box 8 controls the first driving mechanism 6 to drive the fan 3, so that the rotation speed of the fan 3 becomes larger, and the suction force on the filter plate 21 is enhanced, thereby ensuring that the amount of air transported to the inside of the equipment is sufficient.

[0085] When the rotation speed of the fan 3 reaches a certain level, it means that there is a lot of dust attached to the filter plate 21. At this time, the rotation of the centrifugal clutch 71 can drive the worm 73 to rotate, thereby driving the worm wheel 74 to rotate. The rotation of the worm wheel 74 can drive the gear box 75. The low-speed shaft of the gear box 75 drives the driving wheel 76 to rotate. The driving wheel 76 rotates 180° to drive the driven wheel 77 to rotate 90°, so that the driven wheel 77 drives the filter shell 23 to rotate 90°, thereby completing the effect of replacing the filter plate 21 of the equipment.

[0086] After the filter plate 21 is replaced, the air flow rate will increase, and the control box 8 will control the first drive mechanism 6 to drive the fan 3, so that the rotation speed of the fan 3 will slow down, thereby ensuring the stability of the internal air delivery, and will always maintain power support for the gas to prevent the flame from burning the remaining gas when the filter plate 21 is replaced, thereby avoiding the risk of backfire in the motor of the existing equipment when replacing the filter component, and achieving the technical effect of preventing backfire when replacing the filter component.

[0087] In this process, the crankshaft 9202 is driven to rotate by the worm gear 73, thereby driving the connecting column 9203 to move back and forth, driving the tube body 9101 to perform air intake and exhaust operations, and the cleaner 91 inhales the air filtered by the filter plate 21 through the air inlet piece 9102, and then blows out the inhaled air through the air outlet piece 9103, and cleans the filter plate 21 at the bottom. The dust is discharged from the equipment through the dust collector 94. At the same time, the transmission rod 9301 is driven to rotate by the high-speed shaft of the gear box 75, thereby driving a second pulley 9303 to rotate. This second pulley 9303 drives the second belt 9302 to rotate, thereby driving another second pulley 9303 to rotate, so that it drives the dust collector 94 to operate, thereby achieving the effect of dust suction and increasing the effect of the equipment cleaning the filter plate 21.

[0088] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

Claims

1. A premixed low nitrogen burner, characterized in that: include: Premixing pipe, used for premixing of combustion gases; A filtering mechanism is arranged on one side of the premixing pipe to filter the premixing air; A fan is connected to one side of the filter mechanism through a first connecting pipe, and a premixing pipe is arranged at the output end of the fan; a flow sensor is arranged in the first connecting pipe; the fan is driven by a first driving mechanism, and the first driving mechanism responds to the flow sensor; wherein the first driving mechanism includes a driving motor, and the fan transmission is arranged at the output end of the driving motor; Cleaning agencies; Wherein, the filtering mechanism comprises: A housing, wherein an air inlet is provided on one side of the housing; A filter shell, the filter shell is rotated and arranged in the outer shell under the drive of the second driving mechanism, and a plurality of filter plates are arranged on the outer side of the filter shell, and the gas entering from the air inlet passes through one of the filter plates and then enters the premixing tube through the first connecting pipe; and the second driving mechanism responds to the speed of the fan, and when the speed of the fan reaches a certain level, the second driving mechanism is driven to operate, and the second driving mechanism drives the filter mechanism to replace the filter plate; Wherein, the second driving mechanism comprises: A centrifugal clutch is arranged at the output end of the driving motor; A gear box is arranged on one side of the driving motor through the centrifugal clutch, the gear box comprises a low-speed shaft, and a driving wheel is arranged on the outer side of the low-speed shaft; A passive wheel is connected to one side of the filter housing, and the passive wheel transmission is arranged on one side of the driving wheel; Wherein, the cleaning mechanism is used to clean the dust attached to the outer side of one of the filter plates; the cleaning mechanism comprises a cleaner arranged in the filter housing; Wherein, the cleaner comprises: A tube body is arranged in the filter housing; An air inlet, connected to the tube body and used for introducing air into the tube body; The air outlet piece is connected to the pipe body and is used for the pipe body to discharge air outwards, and the air outlet piece is arranged toward a filter plate to be cleaned.

2. The premixed low nitrogen burner according to claim 1, characterized in that: The filtering mechanism further comprises a sealing block, which is arranged between two adjacent filtering plates and abuts against the inner wall of the shell.

3. The premixed low nitrogen burner according to claim 1, characterized in that: The driving wheel is a half gear, and the corresponding driven wheel is a gear ring connected to one side of the filter housing.

4. The premixed low nitrogen burner according to claim 1, characterized in that: The cleaner also includes: A sealing plate connected to the outer side of the tube body, wherein the outer side of the sealing plate contacts the inner side of the filter housing; Wherein, the sealing plate can separate the air inlet component and the air outlet component.

5. The premixed low nitrogen burner according to claim 1, characterized in that: The cleaning mechanism also includes an air collecting component, which can drive the air inlet and outlet of the tube body; Wherein, the gas collecting assembly comprises: A moving block is slidably arranged inside the tube body, and when the moving block is driven to move inside the tube body, the tube body can be inhaled through the air inlet member and discharged through the air outlet member; The crankshaft is rotatably arranged on one side of the tube body, the crankshaft transmission is arranged on one side of the centrifugal clutch, and the crankshaft is connected to the moving block through a connecting column.

6. The premixed low nitrogen burner according to claim 1, characterized in that: The cleaning mechanism further comprises a dust collector, which is connected to the housing via a second connecting pipe; Wherein, the dust collector can absorb dust on the corresponding filter plate cleaned by the cleaner when driven by the driving component, and the driving component is transmission-configured at an output end of the gear box.

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