A waste gas purification device based on a silicon-zinc-based honeycomb molecular sieve

Abstract

This invention relates to the field of waste gas treatment equipment technology, and particularly to a waste gas purification device based on silicon-zinc-based honeycomb molecular sieves. The technical problem is that in existing waste gas purification devices, the residence time of waste gas within the silicon-zinc-based honeycomb molecular sieves is short, resulting in uneven dispersion of harmful substances and low waste gas treatment quality. The waste gas purification device based on silicon-zinc-based honeycomb molecular sieves includes a base, a clean gas chamber and a catalytic unit mounted on the base, a rotating frame rotatably connected inside the clean gas chamber, and three silicon-zinc-based honeycomb molecular sieves mounted on the rotating frame. A servo motor is mounted on the clean gas chamber, and the output shaft of the servo motor is connected to the rotating frame. During the reciprocating rotation of the first and second swing plates, the flow direction of the waste gas is guided, causing the airflow direction to continuously change, thereby better reducing the airflow.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment equipment technology, and in particular to a waste gas purification device based on silicon-zinc based honeycomb molecular sieves. Background Technology

[0002] Waste gas purification refers to the process of removing or reducing harmful gases generated from industrial production, vehicle emissions, and other activities through various physical, chemical, and biological methods. With increasing environmental awareness and stricter enforcement of relevant regulations, waste gas purification technology has been widely applied and rapidly developed. Silicon-zinc-based honeycomb molecular sieves are a novel inorganic porous material, mainly composed of silicon and zinc, with a unique honeycomb structure. This material is widely used in waste gas purification due to its excellent physicochemical properties. However, in existing waste gas purification devices based on silicon-zinc-based honeycomb molecular sieves, the waste gas is directly blown into the sieve after entering the purification device. This results in a short residence time of the waste gas within the sieve, affecting its purification effect. Furthermore, due to the uneven dispersion of harmful substances in the waste gas, some areas may experience excessively high local adsorption concentrations. This not only reduces the purification efficiency of the silicon-zinc-based honeycomb molecular sieve but may also lead to premature saturation of the material, thus affecting the overall quality of waste gas treatment. Summary of the Invention

[0003] To overcome the above-mentioned shortcomings, the present invention provides a waste gas purification device based on silicon-zinc-based honeycomb molecular sieve, which can reduce the waste gas flow rate and make the waste gas mix more uniformly, thereby improving the quality of waste gas purification.

[0004] The technical solution is: a waste gas purification device based on silicon-zinc-based honeycomb molecular sieves, including a base, a clean gas box and a catalytic unit on the base, a rotating frame rotatably connected inside the clean gas box, three silicon-zinc-based honeycomb molecular sieves on the rotating frame, a servo motor on the clean gas box, the output shaft of the servo motor being connected to the rotating frame, and an air intake deceleration component, an airflow dispersion component and a rotating component on the clean gas box.

[0005] To further explain, the clean air box is equipped with two air inlets and two air outlets, and the clean air box contains a clean air chamber and a hot blowing chamber.

[0006] To further explain, one of the air outlets of the clean air chamber is connected to the air inlet of the catalytic unit, and the air outlet pipe of the catalytic unit passes through the hot blowing chamber of the clean air chamber.

[0007] To further explain, the intake reduction assembly includes a drive motor. The drive motor is located on the clean air box. Two swing plates and one swing plate are rotatably connected inside the clean air box. A gear rod is rotatably connected to the clean air box. Both swing plates are equipped with bevel gears. The three bevel gears mesh with the gear rod. A torsion spring connects the gear rod and the clean air box. A rotating rod is located on the gear rod. A swing rod is located on the output shaft of the drive motor.

[0008] To further explain, the airflow dispersion component includes a spur gear, a spur gear on the output shaft of the drive motor, a mounting frame inside the clean air box, a rotating ring rotatably connected to the mounting frame, a gear ring on the rotating ring, four sets of air guide plates rotatably connected to the rotating ring, a transmission component connecting several air guide plates in each set of air guide plates, four fixed magnetic rings on the rotating ring, and a movable magnetic ring on one of the air guide plates in each set of air guide plates, with the fixed magnetic ring and the movable magnetic ring engaging.

[0009] To further explain, the rotating component includes bevel gears. Four air guide plates with movable magnetic rings are equipped with bevel gears. The mounting frame contains a gear ring one and a gear ring two. The gear ring two has a number of teeth randomly arranged on it. The gear ring one has a number of groups of teeth evenly spaced on it. Each group of teeth has three teeth. The teeth on the gear ring one and the gear ring two are arranged facing each other. Each group of teeth on the gear ring one corresponds to three teeth on the gear ring two.

[0010] Further explanation: It also includes a sealing assembly, which includes a gearbox. The gearbox is mounted on the clean air box. The input shaft of the gearbox is connected to a spur gear. The output shaft of the gearbox is equipped with a transmission gear. A top plate is rotatably connected to the clean air box. A one-way bearing is mounted on the rotating shaft of the top plate. A rotating gear is mounted on the one-way bearing. A sealing frame is slidably connected to the clean air box. Several return springs are connected between the sealing frame and the clean air box. A top rod is slidably connected to the clean air box. Two rocker arms are rotatably connected to the clean air box. One end of each rocker arm contacts the top rod, and the other end contacts the sealing frame. A rubber ring is mounted on the sealing frame.

[0011] To further explain, it also includes a heat dissipation frame. The heat dissipation frame is connected to the gas outlet pipe of the catalytic unit. The heat dissipation frame is located in the hot blowing chamber of the clean air box, and a rubber pad is provided on the swing rod.

[0012] Beneficial effects: 1. During the rotation of the gear rod, the bevel gear will rotate, and the rotation of the bevel gear will drive the swing plate one and swing plate two to rotate back and forth. After the exhaust gas enters the bottom clean air box, it will be blown onto the swing plate one and swing plate two. Due to the obstruction of the swing plate one and swing plate two, the flow rate of the exhaust gas will decrease. During the reciprocating rotation of the swing plate one and swing plate two, the flow direction of the exhaust gas will be guided, so that the flow direction of the airflow will be continuously changed, thereby making the flow of the airflow better reduced.

[0013] 2. The bevel gear meshes with the second gear ring, which has randomly placed teeth. This causes the air guide plate to reverse and reset three times. Subsequently, the bevel gear meshes with the first gear ring again. In this way, the blowing direction of the four sets of air guide plates will change randomly, and the blowing direction of each set of air guide plates will be different. This causes the direction of the exhaust gas passing through the air guide plates to change randomly. The exhaust gas dispersed by the air guide plates will collide and mix. In this way, the flow rate of the exhaust gas is further reduced, the residence time of the exhaust gas in the silicon zinc-based honeycomb molecular sieve is increased, and the mixture of exhaust gas is more uniform, thereby improving the purification quality of the silicon zinc-based honeycomb molecular sieve.

[0014] 3. After the silicon-zinc based honeycomb molecular sieve is switched, the output shaft of the drive motor continues to rotate in reverse, causing the top plate to disengage from the top rod. The reset spring will reset the sealing frame, rubber ring, top rod, and swing rod together. The rubber ring will then contact the rotating frame again. This method prevents the leakage of waste gas during the purification process. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a three-dimensional structural diagram of the base, air purification box, and catalytic unit of the present invention.

[0017] Figure 3 This is a cross-sectional three-dimensional structural diagram of the clean air box of the present invention.

[0018] Figure 4 This is a three-dimensional structural diagram of the cylindrical gear and mounting frame of the present invention.

[0019] Figure 5 This is a three-dimensional structural diagram of the mounting frame, rotating ring, and toothed ring of the present invention.

[0020] Figure 6 This is a three-dimensional structural diagram of the rotating ring, air guide plate, and transmission assembly of the present invention.

[0021] Figure 7 This is a three-dimensional structural diagram of the air guide plate and the fixed magnetic ring of the present invention.

[0022] Figure 8 This is a three-dimensional structural diagram of the air guide plate and movable magnetic ring of the present invention.

[0023] Figure 9 For the present invention Figure 5 A magnified three-dimensional structural diagram at point B.

[0024] Figure 10 This is a three-dimensional structural diagram of gear ring one and gear ring two of the present invention.

[0025] Figure 11 For the present invention Figure 4A magnified three-dimensional structural diagram at point A in the middle.

[0026] Figure 12 This is a three-dimensional structural diagram of the clean air box, sealing frame, and return spring of the present invention.

[0027] Figure 13 This is a three-dimensional structural diagram showing the disassembled rocker arm, sealing frame, and top rod of the present invention.

[0028] Figure 14 This is a three-dimensional structural diagram of the sealing component of the present invention.

[0029] Figure 15 This is a three-dimensional structural diagram of the air purification box, catalytic unit, and heat dissipation frame of the present invention.

[0030] The meanings of the reference numerals in the diagram are as follows: 1-Base, 2-Clean air box, 3-Catalytic unit, 4-Rotating frame, 5-Servo motor, 6-Silicon zinc-based honeycomb molecular sieve, 71-Drive motor, 72-Oscillating plate one, 73-Oscillating plate two, 74-Gear rod, 75-Bevel gear, 76-Torsion spring, 77-Rotating rod, 78-Oscillating rod, 81-Column gear, 812-Gear ring, 82-Mounting frame, 83-Rotating ring, 84-Guide 85-Transmission assembly, 86-Fixed magnetic ring, 87-Movable magnetic ring, 91-Bevel gear, 92-Ring gear one, 93-Ring gear two, 101-Gearbox, 102-Transmission gear, 103-Top plate, 104-One-way bearing, 105-Rotating gear, 106-Sealing frame, 1061-Top rod, 1062-Swing rod, 107-Reset spring, 108-Rubber ring, 11-Heat dissipation frame, 12-Rubber pad. Detailed Implementation

[0031] The invention will now be described more fully below with reference to the accompanying drawings, in which presently preferred embodiments of the invention are illustrated. However, the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness and to fully convey the scope of the invention to those skilled in the art.

[0032] Example 1: A waste gas purification device based on silicon-zinc based honeycomb molecular sieve, such as Figures 1-10 As shown, it includes a base 1, on which a clean air box 2 and a catalytic unit 3 are mounted. A rotating frame 4 is rotatably connected inside the clean air box 2. Three silicon-zinc based honeycomb molecular sieves 6 are mounted on the rotating frame 4. A servo motor 5 is mounted on the clean air box 2. The output shaft of the servo motor 5 is connected to the rotating frame 4. An air intake deceleration assembly, an airflow dispersion assembly, and a rotating assembly are mounted on the clean air box 2.

[0033] The clean air box 2 is equipped with two air inlets and two air outlets, and the clean air box 2 contains a clean air chamber and a hot blowing chamber.

[0034] One of the air outlets of the clean air box 2 is connected to the air inlet of the catalytic unit 3, and the air outlet pipe of the catalytic unit 3 passes through the hot blowing chamber of the clean air box 2.

[0035] The intake deceleration assembly includes a drive motor 71. The drive motor 71 is mounted on the clean air box 2. Two swing plates 72 and one swing plate 73 are rotatably connected inside the clean air box 2. A gear rod 74 is rotatably connected to the clean air box 2. Both swing plates 72 and swing plate 73 are equipped with bevel gears 75. The three bevel gears 75 mesh with the gear rod 74. A torsion spring 76 connects the gear rod 74 and the clean air box 2. A rotating rod 77 is mounted on the gear rod 74. A swing rod 78 is mounted on the output shaft of the drive motor 71.

[0036] The airflow dispersion component includes a spur gear 81, a spur gear 81 on the output shaft of the drive motor 71, a mounting frame 82 inside the clean air box 2, a rotating ring 83 rotatably connected to the mounting frame 82, a gear ring 812 on the rotating ring 83, four sets of air guide plates 84 rotatably connected to the rotating ring 83, a transmission component 85 connecting several air guide plates 84 in each set of air guide plates 84, four fixed magnetic rings 86 on the rotating ring 83, and a movable magnetic ring 87 on one of the air guide plates 84 in each set of air guide plates 84, with the fixed magnetic rings 86 and the movable magnetic rings 87 engaging.

[0037] The rotating assembly includes a bevel gear 91, four air guide plates 84 with movable magnetic rings 87 are equipped with bevel gears 91, and a gear ring 1 92 and a gear ring 2 93 are provided in the mounting frame 82. The gear ring 2 93 is randomly provided with a number of teeth, and the gear ring 1 92 is provided with a number of groups of teeth evenly spaced. Each group of teeth has three teeth. The teeth on the gear ring 1 92 and the gear ring 2 93 are arranged facing each other, and each group of teeth on the gear ring 1 92 corresponds to three teeth on the gear ring 2 93.

[0038] During operation, the exhaust gas, after preliminary filtration to remove particulate matter, enters the clean air chamber 2 through the upper air inlet. The drive motor 71 starts, and its output shaft drives the swing rod 78 to rotate. During rotation, the swing rod 78 strikes the rotating rod 77, which in turn drives the gear rod 74 to rotate. The torsion spring 76 is torn, and as the swing rod 78 continues to rotate, it disengages from the rotating rod 77. The torsion spring 76 then resets, causing the gear rod 74 to reverse and reset. This process repeats, causing the gear rod 74 to rotate in both directions. During this rotation, the gear rod 74 drives the bevel gear 75, which in turn drives the swing plates 72 and 73 to rotate. After the exhaust gas enters the clean air chamber 2, it is blown towards the swing plates 72 and 73. On 72 and 73, the flow rate of the exhaust gas decreases due to the obstruction of 72 and 73. During the reciprocating rotation of 72 and 73, the flow direction of the exhaust gas is guided, causing the airflow direction to continuously change, thus further reducing the airflow velocity. The rotation of the drive motor output shaft drives the spur gear 81 to rotate, which meshes with the gear ring 812. The rotation of the gear ring 812 drives the rotating ring 83 to rotate, which in turn drives the guide plate 84 to rotate. After being decelerated by 72 and 73, the exhaust gas enters the clean air chamber of the clean air box 2. The exhaust gas passes through the guide plate 84, causing it to disperse and be blown outwards. To prevent waste gas from being concentrated and blown towards the silicon-zinc based honeycomb molecular sieve 6, the rotating ring 83 rotates, causing the guide plate 84 to rotate as well. During this process, the bevel gear 91 intermittently meshes with the gear ring 1 92 and the gear ring 2 93. After the bevel gear 91 and the gear ring 1 92 mesh, they drive the guide plate 84, which has a movable magnetic ring 87, to rotate, thereby overcoming the attraction force between the movable magnetic ring 87 and the fixed magnetic ring 86. During the rotation of the guide plate 84 with the movable magnetic ring 87, it drives other guide plates 84 to rotate together through the transmission component 85. As the rotating ring 83 continues to rotate, the bevel gear 91 disengages from the gear ring 1 92. Then, the bevel gear 91 meshes with the gear ring 2 93, which has randomly provided teeth, causing the guide plate 84 to reverse and reset three times. Subsequently... The bevel gear 75 will mesh with the gear ring 92 again. In this way, the blowing direction of the four sets of air guide plates 84 will change randomly, and the blowing direction of each set of air guide plates 84 will be different. This causes the exhaust gas blowing direction through the air guide plates 84 to change randomly, and the exhaust gas dispersed by the air guide plates 84 will collide and mix. In this way, the flow rate of the exhaust gas is further reduced, the residence time of the exhaust gas in the silicon-zinc based honeycomb molecular sieve 6 is increased, and the exhaust gas is mixed more evenly, thereby improving the purification quality of the silicon-zinc based honeycomb molecular sieve 6. The decelerated and mixed exhaust gas is then introduced into the silicon-zinc based honeycomb molecular sieve 6 for purification treatment. The purified exhaust gas is discharged through the outlet of the clean air box 2. After the exhaust gas has been treated for a period of time, during the process of switching the silicon-zinc based honeycomb molecular sieve 6...When exhaust gas stops flowing into the clean air chamber 2, the output shaft of the servo motor rotates 120 degrees, causing the silicon-zinc based honeycomb molecular sieve 6, which purifies the exhaust gas, to rotate into the hot air blowing chamber of the clean air chamber 2. Then, hot air is introduced into the air inlet located at the bottom of the clean air chamber 2. The hot air blows onto the silicon-zinc based honeycomb molecular sieve 6, causing the harmful chemicals adsorbed on the silicon-zinc based honeycomb molecular sieve 6 to detach. The hot air carrying the toxic chemicals is then introduced into the bottom catalytic unit 3, where the toxic chemicals undergo chemical treatment. The heat generated by the chemical reaction in the catalytic unit 3 is discharged from the catalytic unit 3 through hot air, thereby achieving the switching and cleaning of the silicon-zinc based honeycomb molecular sieve 6.

[0039] Example 2: Based on Example 1, such as Figures 11-15 As shown, it also includes a sealing assembly, which includes a gearbox 101. The gearbox 101 is mounted on the clean air box 2. The input shaft of the gearbox 101 is connected to a spur gear 81. The output shaft of the gearbox 101 is equipped with a transmission gear 102. A top plate 103 is rotatably connected to the clean air box 2. A one-way bearing 104 is mounted on the rotating shaft of the top plate 103. A rotating gear 105 is mounted on the one-way bearing 104. A sealing frame 106 is slidably connected to the clean air box 2. Several return springs 107 are connected between the sealing frame 106 and the clean air box 2. A top rod 1061 is slidably connected to the clean air box 2. Two rocker arms 1062 are rotatably connected to the clean air box 2. One end of each rocker arm 1062 contacts the top rod 1061 and the other end contacts the sealing frame 106. A rubber ring 108 is mounted on the sealing frame 106.

[0040] It also includes a heat dissipation frame 11, which is connected to the gas outlet pipe of the catalytic unit 3. The heat dissipation frame 11 is located in the hot blowing chamber of the clean air box 2. The swing rod 78 is provided with a rubber pad 12, which helps to buffer the contact between the swing rod 78 and the rotating rod 77.

[0041] Initially, the rubber ring 108 and the rotating frame 4 are in contact, allowing the exhaust gas to flow only through the silicon-zinc based honeycomb molecular sieve 6 to the exhaust gas purification outlet of the clean air box 2. During the switching of the silicon-zinc based honeycomb molecular sieve 6, the output shaft of the drive motor 71 first reverses 90 degrees, which drives the spur gear 81 to rotate. The rotation of the spur gear 81 drives the input shaft of the gearbox 101 to rotate, and the output shaft of the gearbox 101 drives the transmission gear 102 to rotate. The rotation of the transmission gear 102 drives the rotating gear 105 to rotate. The rotation of the moving gear 105 drives the one-way bearing 104 to rotate, which in turn drives the top plate 103 to rotate. The top plate 103 rotates 90 degrees and strikes the top rod 1061. The top rod 1061, under pressure, moves closer to the silicon-zinc based honeycomb molecular sieve 6. During this movement, the top rod 1061 pushes the swing rod 1062, causing it to swing. This swinging motion pushes the sealing frame 106 away from the silicon-zinc based honeycomb molecular sieve 6, compressing the return spring 107 and causing the sealing frame to... The movement of 106 will cause the rubber ring 108 to move as well, causing the rubber ring 108 to disengage from the rotating frame 4. Subsequently, the servo motor 5 will start to switch the silicon-zinc based honeycomb molecular sieve 6. After the silicon-zinc based honeycomb molecular sieve 6 is switched, the output shaft of the drive motor 71 will continue to reverse 90 degrees, causing the top plate 103 to disengage from the sealing rod 1061. The reset spring 107 will reset, causing the sealing frame 106, rubber ring 108, top rod 1061 and swing rod 1062 to reset together. The rubber ring 108 will then re-engage with the rotating frame. 4. Contact is used to prevent the leakage of exhaust gas during the purification process. Then, the output shaft of the drive motor 71 rotates forward again, the one-way bearing 104 rotates freely, the top plate 103 does not rotate, and the hot gas discharged from the catalytic unit 3 will be introduced into the heat sink 11. The hot gas will be dispersed into the heat sink 11, while the hot gas blown into the hot blowing chamber of the clean air box 2 will be blown towards the heat sink 11. The hot gas will pass through the fins of the heat sink 11 and carry away the heat on the heat sink 11. In this way, the heat generated by chemical evolution is recovered and utilized.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that variations may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waste gas purification device based on silicon-zinc based honeycomb molecular sieve, characterized in that, It includes a base (1), a clean air box (2) and a catalytic unit (3) on the base (1), a rotating frame (4) is rotatably connected inside the clean air box (2), three silicon zinc-based honeycomb molecular sieves (6) are provided on the rotating frame (4), a servo motor (5) is provided on the clean air box (2), the output shaft of the servo motor (5) is connected to the rotating frame (4), and an air intake deceleration assembly, an airflow dispersion assembly and a rotating assembly are provided on the clean air box (2).

2. The waste gas purification device based on silicon-zinc-based honeycomb molecular sieve according to claim 1, characterized in that, The clean air box (2) is equipped with two air inlets and two air outlets. The clean air box (2) contains a clean air chamber and a hot blowing chamber.

3. The waste gas purification device based on silicon-zinc-based honeycomb molecular sieve according to claim 1, characterized in that, One of the air outlets of the clean air box (2) is connected to the air inlet of the catalytic unit (3), and the air outlet pipe of the catalytic unit (3) passes through the hot blowing chamber of the clean air box (2).

4. The waste gas purification device based on silicon-zinc-based honeycomb molecular sieve according to claim 1, characterized in that, The intake deceleration assembly includes a drive motor (71), a clean air box (2) is provided with a drive motor (71), two swing plates (72) and one swing plate (73) are rotatably connected inside the clean air box (2), a gear rod (74) is rotatably connected to the clean air box (2), bevel gears (75) are provided on both swing plates (72) and swing plate (73), the three bevel gears (75) mesh with the gear rod (74), a torsion spring (76) is connected between the gear rod (74) and the clean air box (2), a rotating rod (77) is provided on the gear rod (74), and a swing rod (78) is provided on the output shaft of the drive motor (71).

5. The waste gas purification device based on silicon-zinc-based honeycomb molecular sieve according to claim 4, characterized in that, The airflow dispersion component includes a spur gear (81), a spur gear (81) on the output shaft of a drive motor (71), a mounting frame (82) inside a clean air box (2), a rotating ring (83) rotatably connected to the mounting frame (82), a gear ring (812) on the rotating ring (83), four sets of air guide plates (84) rotatably connected to the rotating ring (83), a transmission component (85) connecting several air guide plates (84) in each set of air guide plates (84), four fixed magnetic rings (86) on the rotating ring (83), and a movable magnetic ring (87) on one of the air guide plates (84) in each set of air guide plates (84), the fixed magnetic ring (86) and the movable magnetic ring (87) attract each other.

6. The waste gas purification device based on silicon-zinc-based honeycomb molecular sieve according to claim 5, characterized in that, The rotating assembly includes a bevel gear (91), four air guide plates (84) with movable magnetic rings (87) are provided with bevel gears (91), and a gear ring 1 (92) and a gear ring 2 (93) are provided in the mounting frame (82). A number of teeth are randomly provided on the gear ring 2 (93), and a number of groups of teeth are evenly spaced on the gear ring 1 (92). Each group of teeth has three teeth. The teeth on the gear ring 1 (92) and the gear ring 2 (93) are arranged facing each other. Each group of teeth on the gear ring 1 (92) corresponds to three teeth on the gear ring 2 (93).

7. The waste gas purification device based on silicon-zinc-based honeycomb molecular sieve according to claim 6, characterized in that, It also includes a sealing assembly, which includes a gearbox (101). The gearbox (101) is mounted on the clean air box (2). The input shaft of the gearbox (101) is connected to a spur gear (81). A transmission gear (102) is mounted on the output shaft of the gearbox (101). A top plate (103) is rotatably connected to the clean air box (2). A one-way bearing (104) is mounted on the rotating shaft of the top plate (103). A rotating gear (105) is mounted on the one-way bearing (104). A sealing frame (106) is slidably connected to the air box (2). Several return springs (107) are connected between the sealing frame (106) and the clean air box (2). A top rod (1061) is slidably connected to the clean air box (2). Two swing rods (1062) are rotatably connected to the clean air box (2). One end of each swing rod (1062) contacts the top rod (1061) and the other end contacts the sealing frame (106). A rubber ring (108) is provided on the sealing frame (106).

8. The waste gas purification device based on silicon-zinc-based honeycomb molecular sieve according to claim 7, characterized in that, It also includes a heat sink frame (11), the heat sink frame (11) is connected to the gas outlet pipe of the catalytic unit (3), the heat sink frame (11) is located in the hot blowing chamber of the clean air box (2), and a rubber pad (12) is provided on the swing rod (78).

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