A cleaning capsule negative pressure recovery device

Abstract

The application relates to the technical field of building wind system cleaning, and discloses a cleaning capsule negative pressure recovery device which comprises a recovery pipe, a dust separation box and an air extractor, the dust separation box is provided with a recovery port, a moving cylinder is slidably connected in the dust separation box; the moving cylinder is divided into a power area and a separation area, the power area is connected with a moving assembly, the bottom of the separation area is provided with a plurality of separation holes, before the moving cylinder moves, the separation area is in communication with the recovery pipe and the air suction end of the air extractor; after the moving cylinder moves, the separation area is in communication with the recovery port and the air outlet end of the air extractor. The cleaning capsule pushing dust to clean the wind system pipeline is not smooth in the wind system pipeline.

Description

A clean capsule negative pressure recovery device Technical Field

[0001] This invention relates to the field of building ventilation system cleaning technology, specifically to a cleaning capsule negative pressure recovery device. Background Technology

[0002] Air ducts in building air conditioning systems are hidden areas prone to dust accumulation and bacterial growth. Therefore, the State Administration for Quality Supervision, Inspection and Quarantine issued the national standard "Cleanup Specification for Air Conditioning and Ventilation Systems (GB1920-2003)," the Ministry of Health issued the "Hygienic Specification for Centralized Air Conditioning and Ventilation Systems in Public Places," and the Ministry of Construction formulated the "Operation and Management Specification for Air Conditioning and Ventilation Systems" to strengthen the cleaning of central air conditioning ducts. Traditional duct cleaning methods involve raising dust from the ducts into the air and then using a vacuum cleaner to remove it. However, this method suffers from incomplete cleaning, complex construction, and long processing time. Therefore, a new cleaning method has emerged that uses gas to propel cleaning capsules through the ducts, pushing dust out of the ducts.

[0003] In practical use, it was found that although the cleaning capsules moved in the duct by gas to remove dust effectively, the friction of the duct wall itself and the increased resistance at the bends in the duct made it difficult for the cleaning capsules to move smoothly inside the duct, and they even got stuck in the duct, which increased the difficulty of implementation. Summary of the Invention

[0004] The present invention aims to provide a cleaning capsule negative pressure recovery device to solve the problem that the cleaning capsule does not move smoothly in the air system duct when using the cleaning capsule to push dust to clean the air system duct.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a cleaning capsule negative pressure recovery device, comprising a recovery pipe, a dust separation box, and an air extractor. The dust separation box is provided with a recovery port, and a movable cylinder is slidably connected inside the dust separation box. The movable cylinder is divided into a power zone and a separation zone. The power zone is connected to a moving component. The bottom of the separation zone is provided with several separation holes. Before the movable cylinder moves, the separation zone is connected to the recovery pipe and the suction end of the air extractor. After the movable cylinder moves, the separation zone is connected to the recovery port and the exhaust end of the air extractor.

[0006] The beneficial effects of this solution are as follows: Before the moving cylinder moves, the separation zone is connected to the recovery pipe and the suction end of the vacuum pump. When the vacuum pump starts to draw air through its working suction pipe, the air at the front end of the cleaning capsule in the duct is drawn outward through the separation zone and the recovery pipe, thereby generating a negative pressure suction force on the front end of the cleaning capsule. This helps the cleaning capsule move more smoothly in the branch pipe, solving the problem of the cleaning capsule not moving smoothly in the air system duct in existing cleaning capsule cleaning devices. It also includes the following beneficial effects:

[0007] 1. When the cleaning capsule pushes the dust into the separation zone, the dust is sucked out through the separation hole, while the cleaning capsule is still blocked in the separation zone, thus automatically separating the cleaning capsule from the dust and completing the cleaning operation of the cleaning capsule.

[0008] 2. After the moving cylinder moves, the separation zone is connected to the recovery port and the air outlet of the vacuum pump. The vacuum pump works continuously and blows air into the separation zone from the air outlet, thereby blowing the cleaning capsules in the separation zone out through the recovery port and simultaneously realizing the automatic recovery of the cleaning capsules.

[0009] 3. Before the moving cylinder moves, the air outlet pipe is directly connected to the recovery port, and the right end of the dust separation box is blown clean.

[0010] 4. By utilizing both the intake and exhaust ends of the air extractor simultaneously, the utilization rate of the air extractor is improved, and the complexity of the device structure is reduced while also reducing production costs.

[0011] 5. Because the cleaning capsules are automatically recycled through the moving cylinder, this recycling device can simultaneously adsorb and recycle cleaning capsules in multiple ducts within the same building, further reducing the difficulty of duct cleaning and improving cleaning efficiency.

[0012] Preferably, the dust separation box is provided with several sliding grooves, and the outer wall of the moving cylinder is provided with several limiting blocks, which are slidably connected to the several sliding grooves respectively.

[0013] Preferably, the suction end of the vacuum pump is connected to a suction pipe, the bottom of the dust separation box is connected to a dust collection box, the suction pipe is connected to the dust collection box, and both the suction pipe and the dust collection box are inclined. Before the moving cylinder moves, the separation hole is connected to the dust collection box.

[0014] Preferably, a first air inlet is provided on the side wall of the dust separation box, and a second air inlet and a third air inlet are symmetrically provided on the side wall of the moving cylinder. Before the moving cylinder moves, the first air inlet, the second air inlet, the third air inlet and the recovery port are all connected to the air blowing end of the air extractor.

[0015] Preferably, the moving component includes a first gear, a second gear, a fixed rack, and a moving rack. The fixed rack is connected to the end of the dust separation box, and the moving rack is connected to the moving cylinder. The first gear and the second gear are coaxially fixed, and the first gear meshes with the fixed rack, while the second gear meshes with the moving rack. The dust separation box also contains a motor and a support plate. The motor is connected to a transmission wheel. One end of the support plate is fixed to the end of the dust separation box, and the bottom of the support plate is slidably connected to the moving cylinder. The other end of the support plate is rotatably connected to a synchronous wheel. A conveyor belt is fitted on the synchronous wheel and the transmission wheel, and a connecting block is fixed on the conveyor belt. Both the first gear and the second gear are rotatably connected to the connecting block.

[0016] Preferably, there are two first gears and two fixed racks, and the first gears and fixed racks are distributed on both sides of the movable rack, and the diameter of the second gear is twice that of the first gear.

[0017] Preferably, all the separation holes are elongated, and the elongated separation holes are parallel to each other, and all the separation holes are perpendicular to the axis of the moving cylinder.

[0018] Preferably, the suction pipe and the recovery pipe are located on both sides of the separation hole, and the lower end of the inclined dust collection box is detachably connected to a cleaning cover.

[0019] Preferably, the recovery tube is Z-shaped, and the bottom of the recovery tube is horizontally tangent to the bottom of the moving cylinder.

[0020] Preferably, the bottom of the recycling tube is provided with an arc-shaped part, the bottom of which is connected to the middle section of the moving cylinder, and the arc-shaped part and the moving cylinder form a golden spiral after the connection. Attached Figure Description

[0021] Figure 1 is a three-dimensional view of Embodiment 1 of the present invention from the front view direction;

[0022] Figure 2 is a three-dimensional view of Embodiment 1 of the present invention from the side view direction;

[0023] Figure 3 is a three-dimensional view of the movable cylinder and the suction pipe in the transition state in Embodiment 1 of the present invention;

[0024] Figure 4 is a three-dimensional view of the movable cylinder and the air outlet pipe in the transition state in Embodiment 1 of the present invention;

[0025] Figure 5 is a schematic diagram of the structure of the movable cylinder in Embodiment 1 of the present invention;

[0026] Figure 6 is a schematic diagram of the internal structure of the dust collection box in Embodiment 1 of the present invention;

[0027] Figure 7 is a diagram showing the movement trajectory of the cleaning capsule in Embodiment 1 of the present invention;

[0028] Figure 8 is a diagram of the movement trajectory of the cleaning capsule in Embodiment 2 of the present invention. Detailed Implementation

[0029] The following detailed description illustrates the specific implementation method:

[0030] The reference numerals in the accompanying drawings include: dust separation box 1, support leg 11, sliding groove 12, first air outlet 13, recovery port 14, dust collection box 15, cleaning cover 151, recovery pipe 2, arc-shaped part 21, moving cylinder 3, partition 31, separation hole 32, limiting block 33, second air outlet 34, third air outlet 35, motor 4, conveyor belt 41, transmission wheel 42, support plate 421, synchronous wheel 422, connecting block 43, bracket 431, slider 432, first gear 44, second gear 45, fixed rack 46, moving rack 47, air extractor 5, suction pipe 51, air outlet pipe 52, cleaning capsule 6.

[0031] Example 1

[0032] Example 1 is basically as shown in Figures 1-7. As shown in Figure 1, a cleaning capsule negative pressure recovery device includes a recovery pipe 2, a dust separation box 1, and an exhaust fan 5. The dust separation box 1 is a horizontally arranged cylinder, and four support legs 11 are welded and fixed to the bottom of the dust separation box 1, forming a stable structure to support the dust separation box 1. The bottom of the recovery pipe 2 is welded and fixed to the side wall of the dust separation box 1, and after fixing, the recovery pipe 2 communicates with the interior of the dust separation box 1. The top of the recovery pipe 2 is sealed to the outlet end of the building air duct through a flange, thereby realizing the connection between this negative pressure recovery device and the building air duct through the recovery pipe 2. As shown in Figure 2, in this embodiment, the recovery pipe 2 is Z-shaped, and after fixing, the bottom of the recovery pipe 2 is horizontally tangent to the bottom of the cylindrical dust separation box 1. The exhaust fan 5 includes an intake end and an exhaust end. The intake end is threadedly connected to an intake pipe 51, and the exhaust end is threadedly connected to an exhaust pipe 52, and both the intake pipe 51 and the exhaust pipe 52 communicate with the interior of the dust separation box 1. In addition, the cleaning capsule 6 recovered in this embodiment is spherical, and correspondingly, the recovery tube 2 is a round tube, and the inner diameter of the recovery tube 2 is equal to the diameter of the cleaning capsule 6.

[0033] A circular collection port 14 is provided on the dust separation box 1. A collection bag (not shown in the figure) is threaded onto the collection port 14. The collection bag is connected to the collection port 14 to collect and temporarily store the collected cleaning capsules 6. A movable cylinder 3 is slidably connected inside the dust separation box 1. The specific method of sliding connection of the movable cylinder 3 is shown in Figures 2 and 3: four elongated sliding grooves 12 are provided on the side wall of the dust separation box 1. The sliding grooves 12 are through grooves. Four limiting blocks 33 are welded and fixed to the outer wall of the movable cylinder 3. The four limiting blocks 33 are slidably connected to the four sliding grooves 12 respectively. The limiting blocks 33 prevent the movable cylinder 3 from rotating relative to the dust separation box 1. As shown in Figure 5, a partition 31 is fixed inside the movable cylinder 3. The partition 31 divides the internal space of the movable cylinder 3 into a power zone on the left and a separation zone on the right. The power zone is connected to a moving component, which enables the movable cylinder 3 to slide left and right in the dust separation box 1. Several separation holes 32 are provided at the bottom of the separation zone. In this embodiment, four separation holes 32 are provided at even intervals. All four separation holes 32 are elongated and are perpendicular to the axis of the moving cylinder 3. The elongated separation holes 32 can provide more space for dust to fall smoothly from the separation holes 32, thereby helping to achieve full separation of the cleaning capsule 6 from the dust. A recovery hole is provided on the side wall of the separation zone, through which the cleaning capsule 6 enters the separation zone of the moving cylinder 3 via the recovery pipe 2; a second air outlet 34 is provided on the rear side wall of the separation zone near the vacuum pump 5, and a third air outlet 35 is provided on the front side wall of the separation zone near the recovery port 14. The diameters of the third air outlet 35 and the recovery port 14 are both larger than the diameter of the cleaning capsule 6 to ensure that the cleaning capsule 6 can pass smoothly through the third air outlet 35 and the recovery port 14; at the same time, as shown in Figure 3, a first air outlet 13 is provided on the side wall of the dust separation box 1, and the first air outlet 13 is sealed and connected to the air outlet pipe 52 on the vacuum pump 5. When the air outlet pipe 52 blows air outward, the gas can be blown towards the recovery port 14 through the first air outlet 13, the second air outlet 34 and the third air outlet 35.

[0034] Referring to Figures 3 and 4, the moving assembly includes a first gear 44, a second gear 45, a fixed rack 46, and a moving rack 47. The power zone on the left side of the moving cylinder 3 is open. The left end of the fixed rack 46 is welded and fixed to the lower part of the left side wall of the dust separation box 1, and the right end of the moving rack 47 is welded and fixed to the upper part of the left side wall of the partition 31. After fixing, the moving rack 47 and the fixed rack 46 are on different horizontal planes. At the same time, a motor 4 is fixed to the lower part of the left side wall of the dust separation box 1 by screws, and the motor 4 is located below the fixed rack 46. After fixing, the output shaft of the motor 4 is horizontal, and a transmission wheel 42 is fixed on the output shaft. A long strip support plate 421 is horizontally provided below the transmission wheel 42, and the left end of the support plate 421 is welded and fixed to the dust separation box 1. On the left side wall, the bottom of the support plate 421 passes through the moving cylinder 3 and is fixed to the bottom of the dust separation box 1, that is, the moving cylinder 3 is slidably set relative to the support plate 421. A synchronous wheel 422 is rotatably connected to the top right end of the support plate 421. A conveyor belt 41 is sleeved on the synchronous wheel 422 and the transmission wheel 42. A connecting block 43 is fixed on the conveyor belt 41. A bracket 431 is fixed on the connecting block 43. The first gear 44 and the second gear 45 are coaxially fixed and rotatably connected to the bracket 431. In order to improve the smoothness of the operation of the moving component, two first gears 44 are fixed on both sides of the second gear 45. At the same time, two fixed racks 46 are set. The two first gears 44 mesh with the two fixed racks 46 respectively. The second gear 45 meshes with the moving rack 47 above. In addition, a slider 432 is fixed at each end of the connecting block 43. The slider 432 has a groove. The bottom of the fixed rack 46 is connected to a protrusion. The protrusion slides in the groove. The cooperation between the slider 432 and the protrusion further improves the stability of the movement of the connecting block 43.

[0035] Furthermore, in this embodiment, the diameter of the second gear 45 is twice that of the first gear 44. When the motor 4 operates and drives the transmission wheel 42 to start rotating, the connecting block 43 fixed on the conveyor belt 41 moves to the right through the conveyor belt 41. The rightward movement of the connecting block 43 drives the first gear 44 to rotate, and the second gear 45 fixed to the first gear 44 rotates synchronously, thereby pushing the moving rack 47 to the right. The rightward movement of the moving rack 47 pushes the moving cylinder 3 to the right in the dust separation box 1, that is, from the position in Figure 3 to the position in Figure 4. Since the diameter of the second gear 45 is twice that of the first gear 44, when the coaxially fixed first gear 44 moves one centimeter relative to the fixed rack 46, the second gear 45 rotates one revolution, causing the moving rack 47 to move two centimeters. In addition, the conveyor belt 41 moves the connecting block 43 by one centimeter, making the moving distance of the moving rack 47 three times that of the connecting block 43. Thus, while ensuring that the moving component pushes the moving cylinder 3 to complete the set moving length, the length space required for the moving component to operate is shortened, thereby reducing the length of the dust separation box 1 and reducing the space occupied by this negative pressure recovery device to meet different working environments. Simultaneously, with the cooperation of the first gear 44 and the second gear 45, the moving rack 47 moves to the right at twice the speed of the conveyor belt 41. The moving rack 47 quickly drives the moving cylinder 3 to the right to blow out the cleaning capsule 6, and then quickly moves to the left to return to the initial position. That is, it reduces the time for the separation zone to move to connect with the air outlet pipe 52 and increases the time for the separation zone to connect with the suction pipe 51. This allows the device to better maintain the negative pressure suction generated at the front end of the cleaning capsule 6 in the air duct through the suction pipe 51, and quickly adjusts the negative pressure environment in the device to better help the next cleaning capsule 6 to be recycled move smoothly. Furthermore, during the operation, increasing the connection time between the separation zone and the suction pipe 51 also increases the connection time between the separation hole 32 and the dust collection box 15, so that dust has more time to fall into the dust collection box 15, thereby reducing the amount of dust entering the dust separation box 1.

[0036] As shown in Figure 1, a dust collection box 15 is welded and fixed to the bottom of the dust separation box 1. The suction pipe 51 of the vacuum pump 5 is connected to the dust collection box 15. The fixed dust collection box 15 is connected to the separation zone in the moving cylinder 3 before it moves to the right through the separation hole 32. At the same time, the separation zone is connected to the recovery pipe 2 through the recovery hole on the side wall. When the vacuum pump 5 is working and the suction pipe 51 starts to suck air, the air at the front end of the cleaning capsule 6 in the air duct is drawn outward through the dust collection box 15, the separation zone and the recovery pipe 2, thereby generating a negative pressure suction force on the front end of the cleaning capsule 6, which helps the cleaning capsule 6 move more smoothly in the air duct. A filter screen is fixed inside the suction pipe 51 to reduce the amount of dust entering the vacuum pump 5. Meanwhile, as shown in Figure 6, both the suction pipe 51 and the dust collection box 15 are inclined downwards. A cleaning cover 151 is detachably connected to the dust collection box 15 by threads. When the cleaning capsule 6 pushes the dust into the separation zone, the dust falls into the dust collection box 15 through the separation hole 32 to separate from the cleaning capsule 6. Furthermore, under its own gravity, the dust slides down and accumulates along the inclined side wall of the dust collection box 15. Opening the cleaning cover 151 allows for the periodic removal of the dust collected in the dust collection box 15.

[0037] Before the moving cylinder 3 moves to the right, as shown in Figure 6, the separation zone is connected to the recovery pipe 2 and the suction pipe 51. When the vacuum pump 5 starts working, the suction pipe 51 draws in air and the exhaust pipe 52 discharges air. At this time, the suction pipe 51 first draws the gas out of the building duct to help the cleaning capsule 6 move smoothly in the duct. The cleaning capsule 6 pushes the dust into the separation zone. The dust is sucked out from the separation hole 32 with the airflow, while the cleaning capsule 6 remains in the separation zone due to the obstruction of the separation hole 32. The inclined suction pipe 51 causes air to flow continuously to the upper left in the dust collection box 15, and most of the dust falls to the bottom of the dust collection box 15 under its own gravity. Then, it remains in the dust collection box 15 due to the obstruction of the "step" formed between the suction pipe 51 and the dust collection box 15, further reducing the chance of dust entering the vacuum pump 5. After the cleaning capsule 6 has completely separated from the dust in the separation zone for a period of time, the motor 4 starts and pushes the moving cylinder 3 to the right end of the dust separation box 1 via the moving rack 47. At this time, the separation zone is connected to the air outlet pipe 52 and the recovery port 14. The air outlet pipe 52 blows air into the separation zone, thereby blowing the cleaning capsule 6 into the recovery bag through the recovery port 14 for temporary storage, and realizing the automatic recovery of the cleaning capsule 6. This scheme utilizes the suction end and the air outlet end of the vacuum pump 5 simultaneously, improving the utilization rate of the vacuum pump 5, reducing the complexity of the device structure and reducing production costs. After the cleaning capsule 6 is recovered in the recovery bag, the motor 4 reverses and drives the moving cylinder 3 to the left via the moving rack 47, so that the separation zone is connected to the recovery pipe 2 and the suction pipe 51 again, and continues to recover the next cleaning capsule 6.

[0038] In addition, before the moving cylinder 3 moves, the air outlet 52 is directly connected to the recovery port 14 and blows clean the right end of the dust separation box 1. Correspondingly, the recovery bag is set as a mesh recovery bag to release the air blown out of the air outlet 52 to the outside of the device. In this embodiment, the moving cylinder 3 realizes the automatic recovery of the cleaning capsule 6, so that this recovery device can simultaneously perform adsorption and recovery work on the cleaning capsule 6 in multiple air ducts in the same building, further reducing the difficulty of air duct cleaning and improving cleaning efficiency. Of course, the moving component in this embodiment can also be replaced by a cylinder. If the cylinder is used to drive the moving cylinder 3 to move left and right, the cylinder can be fixed on the left side wall 1 of the dust separation box, and the output shaft of the cylinder can be fixed to the partition 31.

[0039] Finally, as described above, in this embodiment, the bottom of the Z-shaped recovery pipe 2 is horizontally connected to the bottom of the dust separation box 1, meaning that the cleaning capsule 6 enters the cylindrical separation zone horizontally and tangentially through the recovery pipe 2. As shown in the upper part of Figure 7, the cleaning capsule 6 is spherical. When the spherical cleaning capsule 6 falls from the upper air duct into the recovery pipe 2 and enters the separation zone, under the action of its inertial force, the cleaning capsule 6 will rotate several times along the circular sidewall of the separation zone before stopping at the bottom of the separation zone under its own gravity. The rotation of the cleaning capsule 6 can better separate the dust, thereby improving the separation effect between the cleaning capsule 6 and the dust. Combined with the lower part of Figure 7, the cleaning capsule 6 enters horizontally from the bottom of the circular separation zone. The airflow acting on the separation zone through the separation hole 32 of the suction pipe 51 is divided into two groups, which sweep past the two ends of the cleaning capsule 6 and then flow downward to the suction pipe 51, thereby blowing around the cleaning capsule 6 and further improving the separation effect between the cleaning capsule 6 and the dust.

[0040] Example 2

[0041] A cleaning capsule negative pressure recovery device differs from Embodiment 1 in that the recovery tube 2 in this embodiment is no longer Z-shaped, and the bottom of the recovery tube 2 is provided with an arc-shaped part 21, which is connected to the middle of the moving cylinder 3, and the arc-shaped part 21 and the side wall of the moving cylinder 3 form a golden spiral.

[0042] As shown in Figure 8, when the cleaning capsule 6 enters the separation zone from the arc-shaped portion 21 of the upper recovery pipe 2 along the tangential direction of the moving cylinder 3, the inertial force generated by the movement of the cleaning capsule 6 will cause the spherical cleaning capsule 6 to make a standard golden spiral motion from the arc-shaped portion 21 into the separation zone, so as to better utilize the effect of inertial force and enable the cleaning capsule 6 to make more spiral motions along the inner sidewall of the separation zone, further ensuring the dust separation effect. The golden spiral is widely used in sports. For example, athletes twist and rotate their bodies to throw shot put, hammer throw, and discus in a spiral shape to best realize explosive power output. Therefore, by setting the golden spiral motion trajectory for the cleaning capsule 6 to enter the separation zone, it is possible to more effectively ensure that the cleaning capsule 6 makes a spiral motion in the separation zone.

[0043] Example 3

[0044] A negative pressure recovery device for a cleaning capsule, differing from Embodiment 1, further includes an automatic control system. The automatic control system comprises a microcontroller and sensors. The sensors are installed in the recovery holes at the top of the separation zone. Motor 4 is a servo motor, and the sensors, servo motor 4, and vacuum pump 5 are all connected to the microcontroller. The automatic control system automates the negative pressure recovery process.

[0045] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A negative pressure recovery device for a clean capsule, characterized in that: The device includes a recovery pipe, a dust separation box, and a vacuum pump. The dust separation box has a recovery port, and a movable cylinder is slidably connected inside. The movable cylinder is divided into a power zone and a separation zone. The power zone is connected to a moving component, and the bottom of the separation zone has several separation holes. Before the movable cylinder moves, the separation zone is connected to the recovery pipe and the suction end of the vacuum pump. After the movable cylinder moves, the separation zone is connected to the recovery port and the exhaust end of the vacuum pump. The dust separation box has several sliding grooves, and the outer wall of the movable cylinder has several limiting blocks, which are slidably connected to the sliding grooves. The suction end of the vacuum pump is connected to a suction pipe, and the bottom of the dust separation box is connected to a dust collection box. The suction pipe is connected to the dust collection box, and both the suction pipe and the dust collection box are inclined. Before the movable cylinder moves, the separation holes are connected to the dust collection box. The side wall of the dust separation box has a first air blowing port. The side wall of the moving cylinder is symmetrically provided with a second air inlet and a third air inlet. Before the moving cylinder moves, the first air inlet, the second air inlet, the third air inlet and the recovery port are all connected to the air blowing end of the vacuum pump. The moving component includes a first gear, a second gear, a fixed rack and a moving rack. The fixed rack is connected to the end of the dust separation box, and the moving rack is connected in the moving cylinder. The first gear and the second gear are coaxially fixed and mesh with the fixed rack, and the second gear meshes with the moving rack. The dust separation box is also provided with a motor and a support plate. The motor is connected to a transmission wheel. One end of the support plate is fixed to the end of the dust separation box, and the bottom of the support plate is slidably connected to the moving cylinder. The other end of the support plate is rotatably connected to a synchronous wheel. A conveyor belt is fitted on the synchronous wheel and the transmission wheel. A connecting block is fixed on the conveyor belt. The first gear and the second gear are both rotatably connected to the connecting block.

2. The negative pressure recovery device for a clean capsule according to claim 1, characterized in that: There are two of each of the first gear and the fixed rack, and the first gear and the fixed rack are distributed on both sides of the moving rack. The diameter of the second gear is twice that of the first gear.

3. The negative pressure recovery device for a clean capsule according to claim 2, characterized in that: Several separation holes are elongated and parallel to each other, and several separation holes are perpendicular to the axis of the moving cylinder.

4. The negative pressure recovery device for a clean capsule according to claim 3, characterized in that: The suction pipe and the recovery pipe are located on both sides of the separation hole, and the cleaning cover is detachably connected to the inclined lower end of the dust collection box.

5. The negative pressure recovery device for a clean capsule according to claim 4, characterized in that: The recovery tube is Z-shaped, and the bottom of the recovery tube is horizontally tangent to the bottom of the moving cylinder.

6. The negative pressure recovery device for a clean capsule according to claim 4, characterized in that: The bottom of the recycling tube is provided with an arc-shaped section, the bottom of which is connected to the middle section of the moving cylinder, and the arc-shaped section and the moving cylinder form a golden spiral after the connection.

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