Exhaust treatment device and system for diesel generator sets

Abstract

The present invention discloses an exhaust gas treatment device and system for a diesel generator set, comprising a treatment box, one side of which is connected to an air inlet pipe, and the other side of which is connected to two air outlet pipes. A box door is rotatably connected to one side of the treatment box, a labyrinth plate is installed on one side of the interior of the treatment box, a back pressure sensor is installed on one side of the inner wall of the treatment box, an automatic switching component is also provided inside the treatment box, a longitudinal partition is fixed at the center of the inner wall of the treatment box, and two through holes are provided on one side of the longitudinal partition. The present invention relates to the field of exhaust gas treatment technology. The exhaust gas treatment device and system for a diesel generator set, through the provision of a linkage disassembly and assembly mechanism, achieves the clamping and integral disassembly of an activated carbon adsorption component, a desulfurization component, or a three-way catalytic component, without the need to remove each component separately, thereby greatly improving the disassembly and assembly efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of tail gas treatment, and in particular to a tail gas treatment device and system for a diesel generator set. Background Art

[0002] The exhaust gas generated by diesel generator sets contains hundreds of different compounds, including pollutants such as solid suspended particles, carbon monoxide, carbon dioxide, hydrocarbons, nitrogen oxides, lead and sulfur oxides.

[0003] Referring to a Chinese patent, an exhaust gas treatment device for a diesel generator set (publication number: CN217462323U, publication date: 2022-09-20) solves the problem that traditional exhaust gas treatment devices often use adsorption plates and ternary processors to treat exhaust gas. However, after a long period of adsorption, the permeability of the adsorption plate will deteriorate, affecting the adsorption effect and the normal treatment and circulation of the exhaust gas. When the current ternary processor is used, the exhaust gas passes through the micropores on the ternary processor and is subjected to a catalytic reaction to achieve exhaust treatment. This structure will lead to poor exhaust discharge after long-term use, and is prone to problems such as carbon deposits and dust accumulation. However, this patent still has the following shortcomings:

[0004] (1) Activated carbon adsorption components, desulfurization components, and three-way catalytic converter components need to be replaced after long-term use, but they can only be dismantled individually and cannot be dismantled as a whole, which is troublesome and has low disassembly efficiency;

[0005] (2) After the carbon and dust deposits in the exhaust gas are processed by various components, a small amount of carbon and dust will still remain on the top of the diaphragm. During the removal of the components, due to vibration, some of the carbon and dust will fall to the top of the diaphragm. The space reserved on the top of the diaphragm is relatively narrow, making it inconvenient to clean it;

[0006] To this end, we have proposed an exhaust gas treatment device and system for diesel generator sets to solve the above problems. Summary of the Invention

[0007] In view of the deficiencies in the prior art, the present invention provides an exhaust gas treatment device and system for a diesel generator set, which solves the technical problems mentioned in the background technology.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: an exhaust gas treatment device for a diesel generator set, comprising a treatment box, one side of the treatment box is connected to an air inlet pipe, the other side of the treatment box is connected to two air outlet pipes, one side of the treatment box is rotatably connected to a box door, a labyrinth plate is installed on one side of the interior of the treatment box, a back pressure sensor is installed on one side of the inner wall of the treatment box, an automatic switching component is also provided inside the treatment box, a longitudinal partition is fixed at the central position of the inner wall of the treatment box, two through holes are penetrated on one side of the longitudinal partition, a transverse partition is fixed between one side of the longitudinal partition and one side of the inner wall of the treatment box, the transverse partition cooperates with the longitudinal partition to separate the right side space inside the treatment box into two treatment chambers, and an adsorption component is provided on the top of the inner wall of the treatment box;

[0009] The adsorption assembly includes three U-shaped seats fixed on the top of the diaphragm and the top of the inner wall of the treatment box. Activated carbon adsorption components, desulfurization components, and three-way catalytic components are respectively arranged between the three top and bottom U-shaped seats. The outer surfaces of the activated carbon adsorption components, desulfurization components, and three-way catalytic components are all slidably connected along the inner surfaces of the U-shaped seats. The same adsorption assembly is arranged between the bottom of the diaphragm and the bottom of the inner wall of the treatment box. The adsorption assembly is disassembled and assembled by a linkage disassembly and assembly mechanism.

[0010] Preferably, the linkage disassembly and assembly mechanism includes a horizontal box arranged on one side of the activated carbon adsorption component, the desulfurization component, and the three-way catalytic component, a mounting block is fixed at the central position of the inner wall of the horizontal box, threaded rods are rotatably connected between the two sides of the mounting block and the inner wall of the horizontal box, and two fixing plates are fixed on one side of the horizontal box.

[0011] Preferably, the outer surfaces of the two threaded rods are threadedly connected to two movable plates, and the sides where the two movable plates are close to each other and the sides where the movable plate and the fixed plate are close to each other are fixed with plug-in columns. Slots are provided on both sides of the activated carbon adsorption component, the desulfurization component and the three-way catalytic component, and one end of the plug-in columns passes through the slots and extends to the interior of the slots. One side of the horizontal box is rotatably connected to a rotating rod 1, and one end of the rotating rod 1 passes through the horizontal box and extends to the interior of the horizontal box. One side of the horizontal box is also rotatably connected to a rotating rod 2.

[0012] Preferably, one end of the rotating rod 2 passes through the horizontal box and extends to the inside of the horizontal box, a pulley 1 is fixed on the outer surface of the rotating rod 1, and a pulley 2 is fixed on the outer surface of the rotating rod 2, and the pulley 1 and the pulley 2 are connected by a belt transmission.

[0013] Preferably, a rotating handle is fixed to the other end of the rotating rod 1, a bevel gear 1 is fixed to one end of the rotating rod 1 and the rotating rod 2, a bevel gear 2 is fixed to the outer surface of the two threaded rods, two handles are fixed to one side of the horizontal box, the two bevel gears 1 are engaged with the bevel gear 2, and a cleaning assembly is provided on one side of the activated carbon adsorption component, the desulfurization component, and the three-way catalytic component.

[0014] Preferably, the cleaning assembly includes an L-shaped rod fixed on one side of the activated carbon adsorption component, the desulfurization component, and the three-way catalytic component, and a cleaning brush is fixed at the bottom of the L-shaped rod, and the bristles of the cleaning brush are in contact with the top of the diaphragm.

[0015] Preferably, the automatic switching component includes a drive shaft rotatably connected to one side of the inner wall of the processing box, an L-shaped rod 2 is fixed to one end of the drive shaft, and a baffle is fixed to both ends of the L-shaped rod 2, one side of the baffle contacts one side of the longitudinal partition and covers the through hole, and a drive motor is fixed to one side of the processing box, and the drive motor is fixed to one end of the drive shaft through a coupling.

[0016] The present invention also discloses an exhaust gas treatment system for a diesel generator set, wherein the exhaust gas treatment system includes a detection module, a signal receiving and sending module and a control module. The detection module and the signal receiving and sending module are electrically connected, and the signal receiving and sending module and the control module are electrically connected. The detection module is located inside the back pressure sensor and is used to detect the air pressure in the processing chamber. The signal receiving and sending module is used to receive the electrical signal emitted by the detection module, and the signal receiving and sending module transmits the received electrical signal to the control module. The control module is used to receive the electrical signal emitted by the signal receiving and sending module and control the drive motor to switch.

[0017] Beneficial effects

[0018] The present invention provides an exhaust gas treatment device and system for a diesel generator set. Compared with the prior art, it has the following advantages:

[0019] (1) The exhaust gas treatment device and system for diesel generator sets realizes the clamping and integral disassembly of activated carbon adsorption components, desulfurization components or three-way catalytic components by setting a linkage disassembly and assembly mechanism, without the need to dismantle each component separately, thereby greatly improving the disassembly and assembly efficiency.

[0020] (2) The exhaust gas treatment device and system for diesel generator sets, through the coordinated use of cleaning components and linkage disassembly and assembly mechanisms, can effectively clean the carbon and dust deposits remaining on the top of the diaphragm while pulling out the components when the space reserved on the top of the diaphragm is relatively small. The cleaning efficiency is high, and there is no need to disassemble the components first and then clean the diaphragm.

[0021] (3) The exhaust gas treatment device and system for diesel generator sets realizes the switching of exhaust gas flow channels through the setting of automatic switching components, thereby ensuring the normal treatment and circulation of exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional diagram of the external structure of the present invention;

[0023] Figure 2 It is a rear view of the external structure of the present invention;

[0024] Figure 3 A sectional view of a processing box according to the present invention;

[0025] Figure 4 A three-dimensional diagram of the adsorption component, the linkage disassembly and assembly mechanism, and the cleaning component of the present invention;

[0026] Figure 5 This is a three-dimensional diagram of the linkage disassembly and assembly mechanism of the present invention;

[0027] Figure 6 This is a flow chart of the tail gas treatment system of the present invention.

[0028] In the figure: 1. Treatment box; 2. Inlet pipe; 3. Outlet pipe; 4. Box door; 5. Labyrinth plate; 6. Back pressure sensor; 7. Automatic switching assembly; 8. Longitudinal partition; 9. Through hole; 10. Horizontal partition; 11. Adsorption assembly; 12. Linkage disassembly and assembly mechanism; 13. Cleaning assembly; 111. U-shaped seat; 112. Activated carbon adsorption component; 113. Desulfurization component; 114. Three-way catalytic component; 121. Activated carbon adsorption component; 122. Mounting block; 123. Threaded rod ;124. Fixed plate;125. Movable plate;126. Insert column;127. Slot;128. Rotating rod one;129. Rotating rod two;1210. Pulley one;1211. Pulley two;1212. Belt;1213. Turning handle;1214. Bevel gear one;1215. Bevel gear two;1216. Handle;131. L-shaped rod one;132. Cleaning brush;71. Drive shaft;72. L-shaped rod two;73. Shielding plate;74. Drive motor. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] The present invention provides three technical solutions, including the following embodiments:

[0031] Example 1

[0032] See also Figures 1-4 , an exhaust gas treatment device for a diesel generator set, comprising a treatment box 1, one side of the treatment box 1 is connected to an air inlet pipe 2, the other side of the treatment box 1 is connected to two air outlet pipes 3, one side of the treatment box 1 is rotatably connected to a box door 4, a maze plate 5 is installed on one side of the interior of the treatment box 1, the maze plate 58 has the function of noise reduction and filtering large particles, a back pressure sensor 6 is installed on one side of the inner wall of the treatment box 1, and a detection module is provided inside the pressure sensor 9. The detection module is used to detect the air pressure value inside the treatment box 1 in real time, and an automatic switching component 7 is also provided inside the treatment box 1. A longitudinal partition 8 is fixed at the central position of the inner wall of the treatment box 1, and two through holes 9 are provided on one side of the longitudinal partition 8. A transverse partition 10 is fixed between one side of the longitudinal partition 8 and one side of the inner wall of the treatment box 1, and the transverse partition 10 cooperates with the longitudinal partition 8 to divide the right side space inside the treatment box 1 into two treatment chambers, and an adsorption component 11 is provided on the top of the inner wall of the treatment box 1;

[0033] The adsorption assembly 11 includes three U-shaped seats 111 fixed on the top of the diaphragm 10 and the top of the inner wall of the treatment box 1. Activated carbon adsorption components 112, desulfurization components 113, and three-way catalytic components 114 are respectively arranged between the three top and bottom U-shaped seats 111. The activated carbon adsorption components 112, desulfurization components 113, and three-way catalytic components 114 can effectively adsorb carbon, ash particles, and sulfur-containing toxic gases in the exhaust gas. The outer surfaces of the activated carbon adsorption components 112, desulfurization components 113, and three-way catalytic components 114 are all slidably connected along the inner surface of the U-shaped seat 111. The same adsorption assembly 11 is arranged between the bottom of the diaphragm 10 and the bottom of the inner wall of the treatment box 1. The adsorption assembly 11 is disassembled and assembled through the linkage disassembly and assembly mechanism 12.

[0034] The cleaning component 13 includes an L-shaped rod 131 fixed on one side of the activated carbon adsorption component 112, the desulfurization component 113, and the three-way catalytic component 114. A cleaning brush 132 is fixed to the bottom of the L-shaped rod 131. The bristles of the cleaning brush 132 are in contact with the top of the diaphragm 10. Through the coordinated use of the cleaning component 13 and the linkage disassembly and assembly mechanism 12, when the space reserved at the top of the diaphragm 10 is relatively small, the components can be pulled out while the carbon deposits and dust deposits remaining on the top of the diaphragm 10 are brushed and cleaned well. The cleaning efficiency is high, and there is no need to disassemble the components first and then clean the diaphragm 10.

[0035] The automatic switching component 7 includes a drive shaft 71 rotatably connected to one side of the inner wall of the processing box 1, and an L-shaped rod 72 is fixed to one end of the drive shaft 71. Both ends of the L-shaped rod 72 are fixed with a baffle 73. One side of the baffle 73 contacts one side of the longitudinal partition 8 and covers the through hole 9. A drive motor 74 is fixed to one side of the processing box 1. The drive motor 74 is a three-phase asynchronous motor that can be reversed. The switch is controlled by the control module and is electrically connected to an external power supply. The drive motor 74 is fixed to one end of the drive shaft 71 through a coupling. Through the setting of the automatic switching component 7, the switching of the exhaust gas flow channel is realized to ensure the normal treatment and circulation of the exhaust gas.

[0036] Example 2

[0037] Based on Example 1, see Figure 4 and Figure 5 As shown, the linkage disassembly and assembly mechanism 12 includes a horizontal box 121 arranged on one side of the activated carbon adsorption component 112, the desulfurization component 113, and the three-way catalytic component 114. A mounting block 122 is fixed at the central position of the inner wall of the horizontal box 121. Threaded rods 123 are rotatably connected between both sides of the mounting block 122 and the inner wall of the horizontal box 121. Two fixing plates 124 are fixed on one side of the horizontal box 121.

[0038] The outer surfaces of the two threaded rods 123 are threadedly connected to two movable plates 125, and the sides where the two movable plates 125 are close to each other and the sides where the movable plates 125 and the fixed plate 124 are close to each other are fixed with plug posts 126. Slots 127 are provided on both sides of the activated carbon adsorption component 112, the desulfurization component 113, and the three-way catalytic component 114. One end of the plug posts 126 passes through the slots 127 and extends to the inside of the slots 127. One side of the horizontal box 121 is rotatably connected to a rotating rod 128, and one end of the rotating rod 128 passes through the horizontal box 121 and extends to the inside of the horizontal box 121. One side of the horizontal box 121 is also rotatably connected to a rotating rod 2 129.

[0039] One end of the second rotating rod 129 passes through the horizontal box 121 and extends to the interior of the horizontal box 121. The outer surface of the rotating rod 128 is fixed with a pulley 1210, and the outer surface of the rotating rod 2 129 is fixed with a pulley 2 1211. The pulley 1210 and the pulley 2 1211 are connected by a belt 1212.

[0040] A rotating handle 1213 is fixed to the other end of the rotating rod 128, and a bevel gear 1214 is fixed to one end of the rotating rod 128 and the rotating rod 2 129. The outer surfaces of the two threaded rods 123 are fixed with bevel gear 2 1215. Two handles 1216 are fixed to one side of the horizontal box 121, and the two bevel gears 1214 are engaged with bevel gear 2 1215. A cleaning assembly 13 is provided on one side of the activated carbon adsorption component 112, the desulfurization component 113, and the three-way catalytic component 114. Through the setting of the linkage disassembly and assembly mechanism 12, the activated carbon adsorption component 112, the desulfurization component 113 or the three-way catalytic component 114 can be clamped and disassembled as a whole without the need to remove each component separately, which greatly improves the disassembly and assembly efficiency.

[0041] Example 3

[0042] This embodiment is obtained by combining Example 1 and Example 2. Figure 6 As shown, the present invention also discloses an exhaust gas treatment system for a diesel generator set, the exhaust gas treatment system includes a detection module, a signal receiving and sending module and a control module, the detection module and the signal receiving and sending module are electrically connected, the signal receiving and sending module and the control module are electrically connected, the detection module is located inside the back pressure sensor 6, and is used to detect the air pressure in the processing chamber, the signal receiving and sending module is used to receive the electrical signal sent by the detection module, the signal receiving and sending module transmits the received electrical signal to the control module, the control module is used to receive the electrical signal sent by the signal receiving and sending module, and control the drive motor 74 to switch.

[0043] At the same time, the contents not described in detail in this specification belong to the existing technology well known to those skilled in the art.

[0044] During operation, the exhaust gas enters the interior of the treatment box 1 through the intake pipe 2, and then is diverted to one of the treatment chambers, and flows to the activated carbon adsorption component 112, the desulfurization component 113 and the three-way catalytic component 114 in sequence to achieve effective treatment; when the activated carbon adsorption component 112, the desulfurization component 113 or the three-way catalytic component 114 in the treatment chamber is blocked, affecting the normal circulation of the exhaust gas, the detection module in the back pressure sensor 6 transmits the pressure signal to the signal receiving module after the air pressure increases, the signal receiving module transmits the signal to the control module, and the controller controls the drive motor 74 to rotate, and drives the exhaust gas to rotate. The motor 74 drives the drive shaft 71 and the L-shaped rod 2 72 to rotate, and at the same time the L-shaped rod 2 72 drives the shielding plate 73 to rotate and switch, so as to switch the blocked through hole 9 and guide the exhaust gas to another treatment chamber, so as to switch the exhaust gas flow channel and ensure the normal treatment and circulation of the exhaust gas. When it is necessary to replace the activated carbon adsorption component 112, the desulfurization component 113 or the three-way catalytic component 114, the box door 4 is opened, and the linkage disassembly mechanism 12 is further placed in front of the three components, so that the pins 126 on the fixing plates 124 on both sides are inserted into the slots 127, and the handle is further rotated. Hand 1213 is used to rotate the handle 1213 to drive the rotating rod 128 to rotate. When the rotating rod 128 rotates, the cooperation of the pulley 1210, the pulley 2 1212 and the belt 1213 finally drives the rotating rod 2 129 to rotate. At this time, the rotating rod 128 and the rotating rod 2 129 simultaneously drive the two bevel gears 2 1215 to rotate. At the same time, the two bevel gears 2 1215 drive the bevel gear 1 1214 to rotate. The two bevel gears 1 drive 1214 to rotate the two threaded rods 123. At the same time, the threaded rods 123 drive the two moving plates 125 to move in the opposite directions, finally making the plug 1 on the moving plate 125 rotate. 26 is inserted into the slot 127, and finally the activated carbon adsorption component 112, the desulfurization component 113 or the three-way catalytic component 114 is clamped, and the handle 1216 is further pulled, so that the handle 1216 drives the activated carbon adsorption component 112, the desulfurization component 113 or the three-way catalytic component 114 to slide out of the U-shaped seat 111, and the overall disassembly is realized. When the activated carbon adsorption component 112, the desulfurization component 113 or the three-way catalytic component 114 slides out, the cleaning component 13 is also driven to slide outward at the same time, and finally the bristles of the cleaning brush 132 brush and clean the carbon deposits and dust remaining on the top of the diaphragm 10.

[0045] The above embodiments of the invention are described in detail, but the contents are only preferred embodiments of the invention and should not be considered to limit the scope of the invention. All equivalent changes and improvements made within the scope of the invention should still fall within the scope of the invention.

Claims

1. An exhaust gas treatment device for a diesel generator set, comprising a treatment box (1), characterized in that: One side of the processing box (1) is connected to an air inlet pipe (2), and the other side of the processing box (1) is connected to two air outlet pipes (3). One side of the processing box (1) is rotatably connected to a box door (4). A labyrinth plate (5) is installed on one side of the interior of the processing box (1). A back pressure sensor (6) is installed on one side of the inner wall of the processing box (1). An automatic switching component (7) is also provided inside the processing box (1). A longitudinal partition (8) is fixed at the central position of the inner wall of the processing box (1). Two through holes (9) are provided on one side of the longitudinal partition (8). A transverse partition (10) is fixed between one side of the longitudinal partition (8) and one side of the inner wall of the processing box (1). The transverse partition (10) cooperates with the longitudinal partition (8) to separate the right side space inside the processing box (1) into two processing chambers. An adsorption component (11) is provided on the top of the inner wall of the processing box (1). The adsorption assembly (11) comprises three U-shaped seats (111) fixed to the top of the diaphragm (10) and the top of the inner wall of the treatment box (1); an activated carbon adsorption component (112), a desulfurization component (113), and a three-way catalytic component (114) are respectively arranged between the top and bottom of the three U-shaped seats (111); the outer surfaces of the activated carbon adsorption component (112), the desulfurization component (113), and the three-way catalytic component (114) are all slidably connected along the inner surface of the U-shaped seat (111); the same adsorption assembly (11) is arranged between the bottom of the diaphragm (10) and the bottom of the inner wall of the treatment box (1); and the adsorption assembly (11) is disassembled and assembled via a linkage disassembly mechanism (12); The linkage assembly and disassembly mechanism (12) comprises a transverse box (121) arranged on one side of the activated carbon adsorption component (112), the desulfurization component (113), and the three-way catalytic component (114); a mounting block (122) is fixed at the center of the inner wall of the transverse box (121); threaded rods (123) are rotatably connected between both sides of the mounting block (122) and the inner wall of the transverse box (121); and two fixing plates (124) are fixed on one side of the transverse box (121); The outer surfaces of the two threaded rods (123) are threadedly connected to two movable plates (125), and the sides of the two movable plates (125) and the sides of the movable plates (125) and the fixed plate (124) are fixed with plug posts (126). Slots (127) are provided on both sides of the activated carbon adsorption component (112), the desulfurization component (113), and the three-way catalytic component (114). One end of the plug posts (126) passes through the slots (127) and extends to the inside of the slots (127). One side of the transverse box (121) is rotatably connected to a rotating rod 1 (128), one end of the rotating rod 1 (128) passes through the transverse box (121) and extends to the inside of the transverse box (121). One side of the transverse box (121) is also rotatably connected to a rotating rod 2 (129). A rotating handle (1213) is fixed to the other end of the rotating rod 1 (128), a bevel gear 1 (1214) is fixed to one end of the rotating rod 1 (128) and the rotating rod 2 (129), a bevel gear 2 (1215) is fixed to the outer surface of the two threaded rods (123), two handles (1216) are fixed to one side of the horizontal box (121), and the two bevel gears 1 (1214) are meshed with the bevel gear 2 (1215), and a cleaning assembly (13) is provided on one side of the activated carbon adsorption component (112), the desulfurization component (113), and the three-way catalytic component (114).

2. The exhaust gas treatment device for a diesel generator set according to claim 1, characterized in that: One end of the second rotating rod (129) passes through the transverse box (121) and extends to the interior of the transverse box (121); a pulley 1 (1210) is fixed to the outer surface of the first rotating rod (128); a pulley 2 (1211) is fixed to the outer surface of the second rotating rod (129); and the pulley 1 (1210) and the pulley 2 (1211) are connected to each other via a belt (1212).

3. The exhaust gas treatment device for a diesel generator set according to claim 2, characterized in that: The cleaning assembly (13) comprises an L-shaped rod (131) fixed to one side of the activated carbon adsorption component (112), the desulfurization component (113), and the three-way catalytic component (114); a cleaning brush (132) is fixed to the bottom of the L-shaped rod (131); the bristles of the cleaning brush (132) are in contact with the top of the diaphragm (10).

4. The exhaust gas treatment device for a diesel generator set according to claim 1, characterized in that: The automatic switching assembly (7) includes a driving shaft (71) rotatably connected to one side of the inner wall of the processing box (1), one end of the driving shaft (71) is fixed with an L-shaped rod (72), both ends of the L-shaped rod (72) are fixed with a shielding plate (73), one side of the shielding plate (73) contacts one side of the longitudinal partition (8) and covers the through hole (9), and a driving motor (74) is fixed to one side of the processing box (1), and the driving motor (74) is fixed to one end of the driving shaft (71) through a coupling.

5. The exhaust gas treatment system for diesel generator sets is characterized by: The exhaust gas treatment device for a diesel generator set according to claim 4 is adopted, and the exhaust gas treatment system includes a detection module, a signal receiving and sending module and a control module. The detection module and the signal receiving and sending module are electrically connected, and the signal receiving and sending module and the control module are electrically connected. The detection module is located inside the back pressure sensor (6) and is used to detect the air pressure in the processing chamber. The signal receiving and sending module is used to receive the electrical signal sent by the detection module, and the signal receiving and sending module transmits the received electrical signal to the control module. The control module is used to receive the electrical signal sent by the signal receiving and sending module and control the drive motor (74) to switch.

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