An automatic cleaning device for central air conditioning ventilation ducts

Abstract

This invention relates to the field of central air conditioning duct cleaning technology, and in particular to an automatic cleaning device for central air conditioning ventilation ducts. The device includes a front panel, a middle cleaning panel, and a rear panel. One end of the middle cleaning panel is fixedly connected to the front panel, and the other end is fixedly connected to the rear panel. A steering mechanism and a climbing mechanism are installed on the front panel. A middle cleaning mechanism and a dust collection mechanism are installed on the middle cleaning panel. A tail cleaning mechanism and a drive mechanism are installed on the rear panel. This invention utilizes a linkage and a servo motor to achieve left and right steering of the front wheels, allowing the device to perform horizontal steering and self-adjustment of its direction of travel within the duct, thus improving cleaning efficiency. The climbing mechanism enables the device to climb vertically within rectangular ducts, expanding its application scenarios for duct cleaning.

Description

Technical Field

[0001] This invention relates to the field of central air conditioning duct cleaning technology, and in particular to an automatic cleaning device for central air conditioning ventilation ducts. Background Technology

[0002] Central air conditioning systems used in public places effectively promote air circulation and regulate relative humidity and temperature. However, their ducts are constantly in a humid environment, easily accumulating dust and providing a comfortable breeding ground for harmful microorganisms. This also increases the energy consumption of the air conditioning system, reducing its air exchange and cooling efficiency, thus wasting energy. The ventilation ducts of central air conditioning systems are typically intricate and complex, with very limited internal space. Manual inspection, cleaning, and disinfection are extremely difficult, costly, and inefficient, making them uneconomical. Therefore, most public place managers do not prioritize the cleaning and disinfection of central air conditioning ducts.

[0003] Automatic duct cleaning devices are used in complex central air conditioning ventilation ducts. They can replace cleaning personnel to enter the closed and narrow air conditioning ducts to complete the automatic cleaning task, greatly reducing the workload, improving work efficiency, and saving labor costs. They have become a key piece of equipment for cleaning central air conditioning ducts.

[0004] Patent CN116037583A, entitled "A Cleaning Device for Central Air Conditioning Air Outlet Ducts," includes a power vehicle with retractable support mechanisms on its top and sides. A dust scraping mechanism is fixedly mounted on the support mechanisms, and a cleaning mechanism and a vacuuming mechanism are fixedly mounted on the bottom of the power vehicle. The shortcomings of this patent's solution are twofold: first, it lacks a steering mechanism, thus preventing it from turning within the duct; second, it lacks a climbing mechanism, making vertical climbing within the rectangular duct impossible. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic cleaning device for central air conditioning ventilation ducts, which can solve the above-mentioned technical problems.

[0006] This invention provides an automatic cleaning device for central air conditioning ventilation ducts, comprising a front panel, a middle cleaning panel, and a rear panel. One end of the middle cleaning panel is fixedly connected to the front panel, and the other end is fixedly connected to the rear panel. A steering mechanism and a climbing mechanism are mounted on the front panel. A middle cleaning mechanism and a dust collection mechanism are mounted on the middle cleaning panel. A rear cleaning mechanism and a drive mechanism are mounted on the rear panel. The steering mechanism includes a servo motor and a steering wheel. The servo motor is mounted on the front panel and can drive the steering wheel to rotate. A first steering link and a second steering link are hinged through cylinders protruding at the center and edge of the steering wheel, respectively. The steering mechanism also includes a third steering link, a fourth steering link, and a fifth steering link that are hinged together at their ends. The ends of the first and second steering links are respectively hinged to the third steering link. The end of the fifth steering link is hinged to a front wheel bracket, and a front wheel is rotatably connected to the front wheel bracket via a front wheel axle. The climbing mechanism includes an electric push rod, a left climbing rod, and a right climbing rod. One end of the electric push rod is hinged to the rear vehicle panel, and the other end is hinged to a climbing center shaft. The two ends of the climbing center shaft are respectively hinged to the middle of the left and right climbing rods. One end of the left and right climbing rods is hinged to the front vehicle panel, and the other end is connected to two climbing wheels. The two climbing wheels are fixedly connected to each other via a climbing axle.

[0007] Preferably, the drive mechanism includes a drive motor, a small spur gear is fixedly sleeved on the drive shaft of the drive motor, the small spur gear meshes with a large spur gear, the large spur gear is mounted on the left half-shaft gear shaft, a frame is added to the large spur gear as a planetary carrier for planetary bevel gears, the planetary bevel gears are mounted on the planetary carrier, two planetary bevel gears are placed opposite each other and connected to the half-shaft gear shafts on both sides, the half-shaft gear shafts are connected to the rear wheel, and the rear wheel is mounted on the rear wheel bracket connected to the rear vehicle plate.

[0008] Preferably, ultrasonic ranging sensors are installed on both sides of the front of the front panel and on both sides of the rear of the middle cleaning panel.

[0009] Preferably, the central cleaning mechanism includes a first motor, which is mounted on the central cleaning plate, and a rotating brush is mounted on the drive end of the first motor.

[0010] Preferably, the tail cleaning mechanism includes a tail support, a tail cleaning rocker arm, and a roller brush. The tail support is mounted on the rear panel, and a second motor is mounted on the tail support. The drive end of the second motor is connected to one end of the tail cleaning crank, the other end of the tail cleaning crank is hinged to one end of the tail cleaning connecting rod, the other end of the tail cleaning connecting rod is hinged to the middle of the roller brush, one end of the tail cleaning rocker arm is hinged to the tail support, and the other end is hinged to the roller brush.

[0011] Preferably, the dust collection mechanism includes a suction duct disposed on the central cleaning plate, and the suction duct is connected to a dust collection box.

[0012] Beneficial effects:

[0013] This invention utilizes the cooperation of a linkage and a servo motor to achieve left and right steering of the front wheel, allowing the device to perform horizontal steering and self-adjustment of its direction of travel within the pipe, thus improving cleaning efficiency. The climbing mechanism enables the device to climb vertically within rectangular pipes, expanding the application scenarios for pipe cleaning. It is applicable to various pipe shapes, facilitating the cleaning of the interior of vertical pipes and ensuring safety when using central air conditioning. Attached Figure Description

[0014] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 These are three views of the overall device of the present invention;

[0016] Figure 2 This is a schematic diagram of the bottom structure of the present invention;

[0017] Figure 3 This is a three-dimensional model diagram of the driving mechanism in this invention;

[0018] Figure 4 This is the bevel gear differential structure in the present invention;

[0019] Figure 5 This is a schematic diagram of the steering mechanism in this invention;

[0020] Figure 6 This is a diagram showing the arrangement of the ultrasonic ranging sensor in this invention;

[0021] Figure 7 This is a schematic diagram illustrating the determination of the device's position and direction of travel in this invention;

[0022] Figure 8 This is a schematic diagram of the climbing mechanism in this invention;

[0023] Figure 9 This is a schematic diagram of the climbing mechanism in this invention;

[0024] Figure 10 This is a schematic diagram of the pressure sensor in this invention;

[0025] Figure 11This is a schematic diagram of the central cleaning mechanism in this invention;

[0026] Figure 12 This is a schematic diagram of the tail cleaning mechanism in this invention;

[0027] Figure 13 This is a schematic diagram of the crank-rocker mechanism in this invention;

[0028] Figure 14 This is a schematic diagram of the dust collection mechanism in this invention;

[0029] Figure 15 This is a three-dimensional model diagram of the overall device in this invention.

[0030] Explanation of reference numerals in the attached diagram: 1-Front plate, 2-Center cleaning plate, 3-Rear plate, 4-Servo motor, 5-Steering wheel, 601-First steering link, 602-Second steering link, 603-Third steering link, 604-Fourth steering link, 605-Fifth steering link, 7-Front wheel bracket, 8-Front wheel, 801-Front wheel axle, 9-Electric push rod, 10-Left climbing bar, 11-Right climbing bar, 12-Climbing center axle, 13-Climbing wheel, 1301-Climbing axle, 14-Drive motor, 15-Small spur gear. 16-Large spur gear, 17-Half-shaft gear shaft, 18-Planetary bevel gear, 19-Rear wheel, 20-Ultrasonic ranging sensor, 21-First motor, 22-Rotating brush, 23-Tail support, 24-Tail cleaning rocker arm, 25-Roll brush, 26-Second motor, 27-Tail cleaning crank, 28-Tail cleaning connecting rod, 29-Suction duct, 30-Dust collection box, 31-Pressure sensor box, 32-Pressure sensor box cover, 33-Pressure sensor ball, 34-Pressure sensor plate, 35-Pressure sensor. Detailed Implementation

[0031] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0034] Example 1

[0035] The automatic cleaning device includes a front panel 1, a middle cleaning panel 2, a rear panel 3, a drive mechanism, a steering mechanism, a climbing mechanism, a middle cleaning mechanism, a rear cleaning mechanism, and a dust collection mechanism. One end of the middle cleaning panel 2 is fixedly connected to the front panel 1, and the other end is fixedly connected to the rear panel 3. The steering mechanism is mounted on the front panel 1, the middle cleaning mechanism and the dust collection mechanism are mounted on the middle cleaning panel 2, the rear cleaning mechanism and the drive mechanism are mounted on the rear panel 3, and the climbing mechanism is mounted on both the front panel 1 and the rear panel 3.

[0036] Drive Mechanism: The device moves using a drive mechanism mounted on the rear platform 3, with the drive motor 14 providing power to the entire device. Since the device has a four-wheel structure, the two rear wheels 19 will rotate at different speeds during steering. To address this speed difference, a bevel gear differential is added to the drive mechanism. The drive mechanism consists of a small spur gear 15, a large spur gear 16, a drive motor 14, a planetary bevel gear 18, a half-shaft gear shaft 17, a rear wheel bracket, and the rear wheels 19. Figure 3 As shown. The planetary bevel gear 18, the half-shaft gear shaft 17, and the large spur gear 16 form a bevel gear differential, the principle of which is as follows. Figure 4 As shown.

[0037] The drive motor 14 provides power to the entire device. A large spur gear 16 is mounted on the left-side half-shaft gear shaft 17. A frame is added to the large spur gear 16 as a planetary carrier for the planetary bevel gear 18, and the planetary bevel gear 18 is mounted on the planetary carrier. The two planetary bevel gears 18 are placed opposite each other and connected to the half-shaft gear shaft 17 on both sides. The half-shaft gear shaft 17 is connected to the rear wheel 19 of the device and is mounted on a rear wheel bracket connected to the rear vehicle plate. When the two wheels rotate at the same speed, the planetary bevel gear 18 and the half-shaft gear shaft 17 mesh but do not slip relative to each other; the differential acts as a coupling. When the two wheels rotate at different speeds, the two planetary bevel gears 18 mesh with the half-shaft gear shaft 17, and the relative rotation between the planetary bevel gear 18 and the half-shaft gear shaft 17 compensates for the speed difference between the two wheels, achieving a differential effect.

[0038] Steering mechanism: Composed of first steering link 601, second steering link 602, third steering link 603, fourth steering link 604, fifth steering link 605, front wheel bracket 7, front wheel 8, front axle 801, front leaf spring 1, steering wheel 5, and servo motor 4, as follows. Figure 5 As shown. The rear end of the third steering link 603 (near the steering wheel) is restricted from movement by the positioning shaft on the front panel 1, allowing only rotation. When the steering wheel moves the second steering link 602, the third steering link 603 rotates around the positioning shaft. Therefore, the servo motor 4 needs to be installed between the rear ends of the two third steering links 603 to ensure that the steering wheel 5 can drive the steering link 2 to rotate smoothly. The servo motor 4 is fixed to the front panel 1, and the first steering link 601 is added between the servo motor 4 and the steering wheel 5 to reinforce the steering link 603 and the servo motor, restrict their movement, and ensure that the parts do not loosen or even fall apart during steering. The first steering link 601 and the second steering link 602 are respectively connected to the end and middle of a third steering link 603. The other end of the third steering link 603 is connected to one end of a fourth steering link 604. The other end of the fourth steering link 604 is connected to one end of a fifth steering link 605. The other end of the fifth steering link 605 is connected to the front wheel bracket 7, and the front wheel 8 is fixed by the front wheel axle 801. When the servo motor 4 rotates, it drives the steering wheel 5 to rotate, thereby displacing the second steering link 602 and pushing the third steering link 603 to rotate. The rotation of the third steering link 603 drives the fourth steering link 604 to rotate, and drives the fifth steering link 605 to rotate, so that the two front wheels 8 complete the steering and drive the entire device to turn horizontally.

[0039] Automatic posture and attitude adjustment: To ensure complete determination of posture and direction, the device employs four ultrasonic ranging sensors 20, positioned as follows... Figure 6As shown, two ranging sensors 1 (left) and 2 (right) at the front are placed in front of the front wheels of the device; two sensors 3 (left) and 4 (right) at the rear are placed behind the middle cleaning plate 2.

[0040] The ranging distances of ranging sensor 1, ranging sensor 2, ranging sensor 3, and ranging sensor 4 are x1, x2, x3, and x4 respectively. By the ranging measurements of the four ranging sensors, the distances from the device to the pipe wall in four directions are detected in real time, so as to judge the real-time position and moving direction of the device in the pipe, as Figure 7 shown, and the steering servo of the device is controlled by a signal, and then the moving direction of the device is adjusted through the steering mechanism. The following will design the action determination based on the data of the ranging sensors:

[0041] (1) Straight driving: As Figure 7 shown in Figure ① of [reference], when the distances measured by ranging sensor 1 and 2 are equal, and the distances measured by ranging sensor 3 and 4 are equal, that is, x1 = x2, x3 = x4, it is determined that the device is driving straight and is located in the middle of the pipe.

[0042] (2) Right offset: As Figure 7 shown in Figure ② of [reference], when the distance measured by ranging sensor 1 is greater than the distance measured by ranging sensor 2, the sum of the distances measured by the two sensors is less than 200 mm, and the distance measured by ranging sensor 3 is less than the distance measured by ranging sensor 4, that is, x1 > x2, x1 + x2 < 200 mm, x3 < x4, it is determined that the moving direction of the device is offset to the right.

[0043] (3) Left offset: As Figure 7 shown in Figure ③ of [reference], when the distance measured by ranging sensor 1 is less than the distance measured by ranging sensor 2, the sum of the distances measured by the two sensors is less than 200 mm, and the distance measured by ranging sensor 3 is greater than the distance measured by ranging sensor 4, that is, x1 < x2, x1 + x2 < 200 mm, x3 > x4, it is determined that the moving direction of the device is offset to the left.

[0044] (4) Right turn: As Figure 7 shown in Figure ④ of [reference], when the distance measured by ranging sensor 1 is less than the distance measured by ranging sensor 2, and the sum of the distances measured by the two sensors is greater than 200 mm, that is, x1 < x2, x1 + x2 > 200 mm, it is determined that the moving direction of the device needs to turn right.

[0045] (5) Left turn: As Figure 7 shown in Figure ⑤ of [reference], when the distance measured by ranging sensor 1 is greater than the distance measured by ranging sensor 2, and the sum of the distances measured by the two sensors is greater than 200 mm, that is, x1 > x2, x1 + x2 > 200 mm, it is determined that the moving direction of the device needs to turn left.

[0046] Climbing mechanism: Composed of left climbing pole 10, right climbing pole 11, two climbing wheels 13, climbing axle 1301, central climbing axle 12, and electric push rod 9, as shown below. Figure 8 As shown. The electric push rod 9 is placed between the two climbing rods. One end of the electric push rod 9 is connected to the middle of the climbing rod via the climbing shaft 12. The other end of the electric push rod 9 is connected to the rear vehicle panel 3. The projection of its connecting hole and the projection of the center of the rear wheel are on a generatrix perpendicular to the vehicle panel. One end of the climbing rod is connected to the front vehicle panel, and the projection of the connecting hole at the other end and the projection of the center of the front wheel are on a generatrix perpendicular to the vehicle panel, connecting to the climbing wheel.

[0047] The climbing wheel 13 is raised by changing the length of the electric push rod 9. When the climbing wheel 13 contacts the central cleaning plate 2, the electric push rod 9 is in its shortest state, such as... Figure 9 As shown by the dotted line; when the climbing pole is raised, the climbing wheels 13 exert pressure on the pipe wall to achieve the frictional force required for vertical climbing, such as... Figure 9 The solid line indicates the portion shown.

[0048] The pressure sensor 35 consists of a pressure sensor ball 33, a pressure sensor housing cover 32, a pressure sensor housing 31, and a pressure sensor plate 34, as follows: Figure 10 As shown. The pressure sensor 35 has a pressure sensing box 31 at the front center, which contains a pressure sensor ball 33 and a pressure sensor plate 34. The pressure sensing box cover 32 is used to fix the pressure sensor ball 33 in the pressure sensing box 31 so that it will not fall out. As the climbing wheel 13 contacts the pipe and continuously increases the pressure, the pressure sensor ball 33 continuously applies pressure to the pressure sensor plate 34. The sensor continuously detects the real-time pressure. If the pressure is less than the predetermined force, it will control the electric push rod 9 to increase the length of the electric push rod 9 to continue to increase the pressure. If the pressure is greater than the predetermined force, the electric push rod 9 will retract slightly to maintain the height of the lifting mechanism, so that the pressure on the climbing wheel 13 is within the preset range, allowing the device to climb vertically through the pipe.

[0049] The central cleaning mechanism consists of a first motor 21 and a rotating brush 22, such as... Figure 11 As shown. A suction duct 29 is fixed to the upper part of the central cleaning plate 2, used to suck dust into the dust collection box 30. The central cleaning plate 2 also connects the front and rear vehicle panels and fixes the first motor. Below the central cleaning plate 2, two first motors 21 drive two rotating brushes 22 to rotate at high speed, loosening the dust and adhering it to the brush bristles, while simultaneously collecting the dust. The dust adhering to the brush bristles can be sucked away and collected by a dust collection device. After cleaning, the brushes can be removed for washing. As the device moves forward, the central cleaning mechanism cleans the bottom surface of the duct and the lower half of the duct sidewalls.

[0050] The tail cleaning mechanism mainly consists of a second motor 26, a tail cleaning crank 27, a tail cleaning connecting rod 28, a tail cleaning rocker arm 24, a roller brush 25, and a tail support 23. Figure 12 As shown, the tail cleaning support 23 supports a continuously rotating second motor 26, which powers the crank-rocker mechanism and fixes one end of the tail cleaning rocker 24. After the second motor 26 starts, it drives the tail cleaning crank 27 to rotate at a constant speed, thereby causing the tail cleaning connecting rod 28 to move, ultimately realizing the up-and-down reciprocating swing of the tail cleaning rocker 24. When the tail cleaning rocker 24 swings, the roller brush can clean the upper half of the side wall and the top surface, working in conjunction with the central cleaning mechanism to completely clean all four walls of the pipe.

[0051] The crank-rocker mechanism can convert continuous rotation into reciprocating oscillating motion. In real life, when cleaning workers wipe and clean walls, they generally pause briefly in one position and rely on the reciprocating swing of their arms to wipe and clean the walls within a certain arc area. Based on this practical observation and the motion principle of the crank-rocker mechanism, the tail cleaning mechanism of this device also uses a similar working method to clean the pipe wall.

[0052] When the rear cleaning rocker arm 24 is parallel to the rear panel, it is in its lower limit position. At this time, the crank rocker mechanism is in the following posture: Figure 13 As shown by the solid line, at this point, the bottom of the roller brush 25 is parallel to the lower surface of the rear panel 3, and the rear cleaning crank 27 and the rear cleaning connecting rod 28 are collinear, with the crank-rocker mechanism in a right-angled triangle state. When the motor on the rear cleaning crank 27 continues to operate, the rear cleaning rocker 24 will reach its upper limit position, at which point the crank-rocker mechanism will... Figure 13 As shown by the dashed line, the tail cleaning crank 27 and the tail cleaning connecting rod 28 are in another collinear state at this time, and the top of the roller brush 25 contacts the top surface of the pipe and cleans it accordingly.

[0053] Dust collection mechanism: consists of left and right dust collection boxes 30 and suction duct 29, such as Figure 14 As shown. The central cleaning plate 2 is equipped with a suction pipe, and a suction fan is fixed inside the suction pipe 29; a dust collection box 30 is connected to the dust inlet; two dust collection boxes 30 are placed on both sides of the central cleaning plate 2 to suck up dust and collect it in the box.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic cleaning device for central air conditioning ventilation ducts, characterized in that, The system includes a front panel, a middle cleaning panel, and a rear panel. One end of the middle cleaning panel is fixedly connected to the front panel, and the other end is fixedly connected to the rear panel. A steering mechanism and a climbing mechanism are mounted on the front panel. A middle cleaning mechanism and a dust collection mechanism are mounted on the middle cleaning panel. A rear cleaning mechanism and a drive mechanism are mounted on the rear panel. The steering mechanism includes a servo motor and a steering wheel. The servo motor is mounted on the front panel and can drive the steering wheel to rotate. A first steering link and a second steering link are hinged through cylinders protruding at the center and edge of the steering wheel, respectively. The steering mechanism also includes a third, fourth, and fifth steering link, which are hinged sequentially. The ends of the first and second steering links are hinged to the third steering link, and the end of the fifth steering link is hinged to a front wheel bracket. A front wheel is rotatably connected to the front wheel bracket via a front wheel axle. The climbing mechanism includes an electric push rod and a left climbing mechanism. The vehicle includes a climbing pole and a right climbing pole. One end of the electric push rod is hinged to the rear panel, and the other end is hinged to a climbing shaft. The two ends of the climbing shaft are respectively hinged to the middle of the left and right climbing poles. One end of each climbing pole is hinged to the front panel, and the other end is connected to two climbing wheels. The two climbing wheels are fixedly connected by a climbing shaft. The middle cleaning mechanism includes a first motor mounted on the middle cleaning plate. A rotating brush is mounted on the drive end of the first motor. The tail cleaning mechanism includes a tail support, a tail cleaning rocker arm, and a roller brush. The tail support is mounted on the rear panel, and a second motor is mounted on the tail support. The drive end of the second motor is connected to one end of the tail cleaning crank. The other end of the tail cleaning crank is hinged to one end of the tail cleaning connecting rod. The other end of the tail cleaning connecting rod is hinged to the middle of the roller brush. One end of the tail cleaning rocker arm is hinged to the tail support, and the other end is hinged to the roller brush.

2. The automatic cleaning device for central air conditioning ventilation ducts according to claim 1, characterized in that, The drive mechanism includes a drive motor, on which a small spur gear is fixedly mounted. The small spur gear meshes with a large spur gear. The large spur gear is mounted on the left half-shaft gear shaft. A frame is added to the large spur gear as a planetary carrier for planetary bevel gears. The planetary bevel gears are mounted on the planetary carrier. Two planetary bevel gears are placed opposite each other and connected to the half-shaft gear shafts on both sides. The half-shaft gear shafts are connected to the rear wheel, which is mounted on a rear wheel bracket connected to the rear vehicle plate.

3. The automatic cleaning device for central air conditioning ventilation ducts according to claim 1, characterized in that, Ultrasonic ranging sensors are installed on both sides of the front of the front panel and on both sides of the rear of the middle cleaning panel.

4. The automatic cleaning device for central air conditioning ventilation ducts according to claim 1, characterized in that, The dust collection mechanism includes a suction duct installed on the central cleaning plate, and the suction duct is connected to a dust collection box.

Images