Closed cycle self-cleaning negative pressure cleaning device and curtain wall cleaning robot

Abstract

The application provides a closed cycle self-cleaning negative pressure cleaning device and curtain wall cleaning robot. The negative pressure cleaning device comprises a cleaning frame with a cleaning cavity; a roller assembly located in the cleaning cavity and partially exceeding the opening of the cleaning cavity. A negative pressure assembly, a water supply assembly and a backwater assembly are mounted on the cleaning frame, the water supply assembly and the backwater assembly are connected to the cleaning cavity respectively, the water supply assembly is used for spraying cleaning liquid into the cleaning cavity, the backwater assembly is used for recycling mixed liquid in the cleaning cavity, and the negative pressure assembly communicates with the cleaning cavity and forms a negative pressure environment in the cleaning cavity. The negative pressure assembly forms a negative pressure environment in the cleaning cavity to be adsorbed on the surface of the curtain wall, reduces or reduces the acting force of the cleaning device on the curtain wall, realizes automatic adsorption connection, is not limited to the curtain wall cleaning in the direction of gravity, and can also clean the ceiling and other working scenes. The cleaning liquid is stored in the cleaning cavity, so as to avoid the overflow of the cleaning liquid.

Description

Technical Field

[0001] This invention relates to the field of cleaning equipment technology, specifically to a closed-loop self-cleaning negative pressure cleaning device and a curtain wall cleaning robot. Background Technology

[0002] After a long period of use, high-rise buildings, office buildings, and other tall buildings will accumulate a lot of stains. Professional maintenance teams use the Spider-Man cleaning method to clean the exterior curtain walls.

[0003] However, most of the "spider-man" cleaning methods involve high-altitude operations, requiring sophisticated construction techniques and complex equipment. Furthermore, the area around curtain walls is highly susceptible to severe weather conditions such as sudden crosswinds, thunderstorms, and glare from strong sunlight. The "spider-man" cleaning method relies on intensive, continuous, and physically demanding manual labor at high altitudes, leading to low cleaning efficiency and high costs.

[0004] In addition, the Spider-Man cleaning method inevitably involves using a roller brush sprayer to clean the curtain wall, which can result in sewage overflow and technical issues such as only being able to clean the surface of the curtain wall in the direction of gravity. Summary of the Invention

[0005] To address the technical problems of existing technologies that can only clean curtain walls in the direction of gravity and have low cleaning efficiency, this invention proposes a closed-loop self-cleaning negative pressure cleaning device and a curtain wall cleaning robot.

[0006] A first aspect of the present invention provides a closed-loop self-cleaning negative pressure cleaning device, comprising:

[0007] A cleaning rack with a cleaning chamber;

[0008] A roller assembly rotatably mounted on the cleaning rack, the roller assembly being located within the cleaning chamber and partially extending beyond the opening of the cleaning chamber;

[0009] The negative pressure assembly, water supply assembly, and water return assembly are installed on the cleaning rack. The water supply assembly and water return assembly are respectively connected to the cleaning chamber. The water supply assembly is used to spray cleaning liquid into the cleaning chamber, and the water return assembly is used to recover the mixed liquid in the cleaning chamber. The negative pressure assembly is connected to the cleaning chamber and forms a negative pressure environment in the cleaning chamber.

[0010] In one embodiment, the water supply assembly is connected in the direction of movement of the cleaning chamber.

[0011] In one embodiment, the water supply assembly and the water return assembly are installed at intervals at one end of the cleaning rack and extend toward the other end.

[0012] In one embodiment, the water supply assembly includes a mixing tank for mixing the cleaning solution, a spray mechanism installed on the cleaning rack, and a water pump connecting the mixing tank and the spray mechanism, wherein the spray mechanism faces the cleaning chamber, and the spray mechanism and the negative pressure assembly are located on opposite sides of the rotation center line of the roller assembly.

[0013] In one embodiment, the water return assembly is connected to the mixing tank.

[0014] In one embodiment, the water return assembly recovers and filters the mixed liquid in the cleaning chamber and is connected to the water supply assembly.

[0015] In one embodiment, the water return assembly includes a water return diaphragm pump installed on the cleaning rack, a water return pipe connecting the water return diaphragm pump and the cleaning chamber, and a filter installed in the water return channel. The water return diaphragm pump is connected to the water supply assembly.

[0016] In one embodiment, the cleaning rack includes a support body and a wiping cloth mounted on the support body. The cleaning cavity is an opening formed by recessing the support body surface for conforming to the surface to be cleaned. The wiping cloth is disposed around the cleaning cavity and is used to conform to the surface to be cleaned. At least a portion of the roller assembly elastically extends beyond the surface of the wiping cloth.

[0017] In one embodiment, the cleaning rack includes a scraping device mounted on the support body, the scraping device being located rearward in the direction of movement of the cleaning rack.

[0018] In one embodiment, the support body is provided with a scraper mechanism that extends beyond the wall of the cleaning chamber and abuts against the cylindrical cleaning surface of the roller assembly.

[0019] In one embodiment, the scraper mechanism is a scraper rib, which is located in the direction in which the roller assembly rotates away from the plane to be cleaned.

[0020] In one embodiment, the edge of the cleaning rack is provided with a collision-prevention beam mechanism, which is located in the direction of movement of the cleaning rack.

[0021] In one embodiment, the negative pressure component is installed on the cleaning rack, and the cleaning rack is provided with a negative pressure channel communicating with the negative pressure component. The negative pressure channel gradually increases in size from the negative pressure component toward the cleaning chamber.

[0022] In one embodiment, the negative pressure component is located in the middle region of the cleaning rack.

[0023] In one embodiment, the negative pressure assembly includes a negative pressure fan and a protective cover covering the negative pressure fan. The protective cover is detachably connected to the cleaning rack and is provided with multiple ventilation grilles.

[0024] In one embodiment, the roller assembly includes a roller component rotatably connected to the cleaning rack and a roller drive component mounted on one end of the cleaning rack, the roller drive component being drivenly connected to the roller component.

[0025] A second aspect of the present invention provides a curtain wall cleaning robot, comprising a robot body and a closed-loop self-cleaning negative pressure cleaning device as described above, wherein the cleaning frame is mounted on the robot body.

[0026] In this invention, the negative pressure component creates a negative pressure environment within the cleaning chamber, allowing it to adhere to the surface of the curtain wall. This reduces or minimizes the force exerted by the cleaning device on the curtain wall, achieving automatic adhesion. It is not limited to curtain wall cleaning in the direction of gravity and can also be used to clean ceilings and other similar surfaces. The water supply component sprays cleaning fluid onto the curtain wall surface, ensuring the roller assembly maintains a clean liquid environment and improves cleaning effectiveness. The cleaning fluid is collected within the cleaning chamber, preventing spillage and resulting in a high level of overall cleanliness. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of an embodiment of the present invention;

[0029] Figure 2 This is a first-view perspective perspective view of a negative pressure cleaning device provided in an embodiment of the present invention;

[0030] Figure 3 This is a second-view perspective perspective view of a negative pressure cleaning device provided in an embodiment of the present invention;

[0031] Figure 4 This is a cross-sectional view of a negative pressure cleaning device provided in an embodiment of the present invention;

[0032] Figure 5 This is an exploded structural diagram of a negative pressure cleaning device provided in an embodiment of the present invention;

[0033] Figure 6 This is a schematic diagram of the structure of a cleaning rack provided in an embodiment of the present invention.

[0034] 10. Cleaning rack; 11. Cleaning chamber; 111. Rib; 12. Return water chamber; 13. Scraper mechanism; 131. Scraper rib; 14. Scraper condition; 141. Fixing frame; 142. Connecting frame; 143. Spring component; 15. Wiping cloth component; 16. Anti-collision beam mechanism; 17. Negative pressure channel; 18. Base plate; 19. Support body; 20. Roller assembly; 21. Roller drive component; 22. Roller component; 30. Water supply assembly; 31. Mixing tank; 32. Water supply pump; 33. Spraying mechanism; 40. Return water assembly; 41. Return water diaphragm pump; 42. Filter; 50. Negative pressure assembly; 51. Negative pressure fan; 52. Protective cover; 60. Robot body. Detailed Implementation

[0035] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0036] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0037] Example 1

[0038] like Figures 1 to 3 As shown, this embodiment provides a closed-loop self-cleaning negative pressure cleaning device. The negative pressure cleaning device includes a cleaning frame 10 with a cleaning chamber 11. The cleaning frame 10 is a thin-walled rigid structural component to reduce the overall weight and install other components. Preferably, the cleaning frame 10 is a long, thin-walled structural component, with a flat surface on one side of the curtain wall, and the cleaning chamber 11 is formed by recessing an arc-shaped groove from this flat surface.

[0039] The negative pressure cleaning device also includes a roller assembly 20 rotatably mounted on the cleaning frame 10, a negative pressure assembly 50 fixedly mounted on the cleaning frame 10, a water supply assembly 30, and a water return assembly 40. The roller assembly 20 is located inside the cleaning chamber 11 and extends slightly beyond the opening of the cleaning chamber 11. During the rotation of the roller assembly 20, it rolls and rubs to clean the surface of the curtain wall, thereby improving the cleaning effect of the curtain wall.

[0040] Water supply component 30 and water return component 40 are respectively connected to cleaning chamber 11. Water supply component 30 sprays cleaning fluid into cleaning chamber 11 so that roller component 20 is always in a closed liquid cleaning environment, so that water supply component 30 sprays and softens the cleaning curtain wall area, and then the stains are removed by roller component 20.

[0041] After cleaning the curtain wall, the roller assembly 20 forms a mixed liquid containing dirt. This mixed liquid flows along the cleaning chamber 11 into the return water chamber 12 on the cleaning rack 10. The return water chamber 12 is either a portion of the cleaning chamber 11 located at either end, or a chamber connected to and located at both ends of the cleaning chamber 11. The return water assembly 40 is connected to the return water chamber 12 and is used to recover the mixed liquid within the cleaning chamber 11. Preferably, the return water assembly 40 has a filtration mechanism to filter the mixed liquid, enabling reuse of the cleaning solution and reducing water requirements. Preferably, the return water chamber 12 is located at both ends of the cleaning rack 10 to utilize the principle of gravity to recover residual liquid.

[0042] The negative pressure component 50 is connected to the cleaning chamber 11 and forms a negative pressure environment in the cleaning chamber 11. The negative pressure component 50 draws the gas out of the cleaning chamber 11 to form a negative pressure environment. The negative pressure component 50 is used to construct a pressure field, and combined with the action of airflow and wind, the dynamic sealing of the negative pressure cleaning device is achieved.

[0043] Therefore, the negative pressure component 50 creates a negative pressure environment within the cleaning chamber 11, allowing it to adhere to the surface of the curtain wall. This reduces or minimizes the force exerted by the cleaning device on the curtain wall, achieving automatic adhesion and connection. It is not limited to curtain wall cleaning in the direction of gravity and can also be used to clean ceilings and other work environments. The water supply component 30 sprays cleaning fluid onto the curtain wall surface, ensuring that the roller component 20 maintains a clean liquid environment and improves cleaning effectiveness. The cleaning fluid is collected within the cleaning chamber 11, preventing spillage and ensuring a high level of overall cleanliness.

[0044] Example 2

[0045] like Figures 1 to 5 As shown, in one embodiment, the water supply assembly 30 is connected to the moving direction of the cleaning chamber 11, so that the water supply assembly 30 sprays cleaning fluid onto the curtain wall surface. In this embodiment, the water supply assembly 30 is located in the moving direction of the negative pressure cleaning device, enabling it to wash and soak the curtain wall surface in the corresponding area of ​​the cleaning chamber 11 with cleaning fluid. The curtain wall is in a softened environment of cleaning fluid before being cleaned by the roller assembly 20, which improves the cleaning effect of the roller assembly 20 and enhances the cleanliness of the curtain wall.

[0046] The water supply assembly 30 and the water return assembly 40 can be independently installed on the cleaning rack 10 to form a multi-point assembly structure. For example, the water supply assembly 30 is installed at one end of the cleaning rack 10 and extends to the other end to form a spray structure spanning the cleaning chamber 11. The water return assembly 40 is installed on the cleaning rack 10 and is spaced apart from the water supply assembly 30. The water return assembly 40 is connected to the water return chambers 12 located at both ends of the cleaning rack 10 to extract the mixed liquid containing dirt.

[0047] Furthermore, the water supply assembly 30 and the return water assembly 40 are spaced apart and installed at one end of the cleaning rack 10, extending towards the other end. The drive portion of the water supply assembly 30 and the drive portion of the return water assembly 40 are installed at one end of the cleaning rack 10 and located outside the cleaning rack 10, thereby facilitating pipeline connection. The spray mechanism 33 of the water supply assembly 30 and the liquid suction mechanism of the return water assembly 40 extend along the cleaning chamber 11 towards the other end to span the cleaning chamber 11, expanding the spray and return water range. Preferably, the spray mechanism 33 can be configured as a nozzle assembly or a water outlet pipe assembly to output cleaning fluid into the cleaning chamber 11.

[0048] Example 3

[0049] In one embodiment, the water return assembly 40 recovers and filters the mixed liquid in the cleaning chamber 11, wherein particulate matter in the mixed liquid is filtered by a filter screen, and the reusable liquid portion is filtered to form an aqueous solution. The water return assembly 40 is connected to the water supply assembly 30 to provide the filtered aqueous solution to the water supply assembly 30 for recycling, thereby reducing water consumption.

[0050] In one specific embodiment, the return water assembly 40 includes a return water diaphragm pump 41 installed on the cleaning rack 10, a return water pipe connecting the return water diaphragm pump 41 and the cleaning chamber 11, and a filter 42 installed in the return water channel. The return water diaphragm pump 41 is connected to the water supply assembly 30, and the filter 42 is located between the return water diaphragm pump 41 and the water supply assembly 30. The return water diaphragm pump 41 is installed at one end of the cleaning rack 10 to drive the operation of the return water assembly 40. The return water pipe connects to the return water chambers 12 located at both ends of the cleaning rack 10, and extracts the mixed liquid in the return water chambers 12 when the return water diaphragm pump 41 is running. In an optional embodiment, the return water assembly 40 includes a water level sensor disposed in the return water chamber 12. The water level sensor sends an electrical signal to the controller, which then controls the return water diaphragm pump 41 to operate in order to extract the mixed liquid in the return water chamber 12. The return water diaphragm pump 41 operates when the water level in the return water chamber 12 reaches a preset height to achieve automatic extraction and good automatic control effect. Optionally, the water level sensor is located at the top of the gravity-directed return water chamber 12 to enable large-capacity extraction.

[0051] Furthermore, the return water assembly 40 also includes a solenoid valve. The return water pipeline is provided with two paths, one of which connects the return water chamber 12 at one end of the cleaning rack 10 to the solenoid valve, and the other path connects the return water chamber 12 at the other end of the cleaning rack 10 to the solenoid valve. The controller controls the operation of the solenoid valve based on the electrical signal of the water level sensor, so that the return water diaphragm pump 41 draws the mixed liquid in one of the return water chambers 12.

[0052] The water supply assembly 30 sprays cleaning fluid into the cleaning chamber 11. The water supply assembly 30 includes a mixing tank 31 for mixing the cleaning fluid, a spraying mechanism 33 mounted on the cleaning rack 10, and a water pump 32 connecting the mixing tank 31 and the spraying mechanism 33. The mixing tank 31 is a box-shaped structure that can be externally mounted on the cleaning rack 10 and connected to the water pump 32 via a pipeline. Preferably, the mixing tank 31 is equipped with a cleaning agent adding mechanism, which adds cleaning agent into the mixing tank 31 to maintain a relatively uniform concentration of cleaning agent within the mixing tank 31, thereby improving the cleaning effect.

[0053] The water pump 32 draws cleaning fluid from the mixing tank 31 and sprays it into the cleaning chamber 11 through the spray mechanism 33 to immerse and clean the curtain wall surface covered by the cleaning chamber 11, thereby improving the cleaning effect. The spray mechanism 33 and the negative pressure component 50 are located on opposite sides of the rotation center line of the roller assembly 20, so that the negative pressure cleaning device can adhere to the surface of the curtain wall through the negative pressure component 50. The negative pressure cleaning device has its own negative pressure adsorption, ensuring positive pressure for cleaning and reducing the burden on the robot.

[0054] The water return assembly 40 is connected to the mixing tank 31 to recycle the clean water filtered by the filter 42, thereby improving water resource utilization, extending the driving range, expanding the cleaning range and duration of the negative pressure cleaning device, and preventing sewage overflow.

[0055] Example 4

[0056] like Figures 1 to 6 As shown, the cleaning frame 10 is the rigid frame part of the negative pressure cleaning device. The cleaning frame 10 includes a support body 19 and a wiping cloth 15 mounted on the support body 19. The wiping cloth 15 is a movable friction component that adheres to the surface of the curtain wall for rubbing and cleaning the surface of the curtain wall. The cleaning chamber 11 is an open cavity formed by a recess in the support body 19 that adheres to the surface to be cleaned. Optionally, the cleaning chamber 11 has an arc-shaped recessed structure, and spaced ribs 111 are provided on the surface of the chamber wall to maintain the flow of cleaning fluid and airflow. The roller assembly 20 is substantially in contact with the ribs 111 to maintain a controllable rotation range; alternatively, the surfaces of the roller assembly 20 and the ribs 111 are spaced apart to improve the rotational flexibility of the roller assembly 20.

[0057] A wiping cloth 15 is arranged around the cleaning chamber 11 and is used to conform to the surface to be cleaned. During the movement of the negative pressure cleaning device, the wiping cloth 15 slides and rubs against the surface of the curtain wall, thereby improving the cleaning effect of the curtain wall. At least a portion of the roller assembly 20 elastically extends beyond the surface of the wiping cloth 15, so that the roller assembly 20 has pre-pressure between itself and the surface of the curtain wall during rotation, improving the friction effect. The outer peripheral wall of the roller assembly 20 is made of rubber, a brush, or a cloth tube to enhance the friction cleaning effect.

[0058] Furthermore, the cleaning rack 10 includes a scraping condition 14 installed on the support body 19, located behind the cleaning rack 10 in the direction of movement. The scraping condition 14 is an elastic rubber strip or spring sheet structure. In the direction of movement of the negative pressure cleaning device, the scraping condition 14 is located behind the wiping cloth 15 to scrape away the residual water film, further improving the scraping effect. Preferably, the cleaning rack 10 includes two fixing components installed at intervals on the support body 19. The fixing components include a fixing frame 141 fixed to the support body 19, a connecting frame 142 rotatably connected to the fixing frame 141, and a spring member 143 elastically connecting one end of the fixing frame 141 and the connecting frame 142. A slot is provided at the other end of the connecting frame 142. The scraping condition 14 is snapped into the slot and abuts against the curtain wall surface under the elastic force of the spring member 143 to achieve pressure scraping. Moreover, the scraping condition 14 is a consumable part, and its snap-fit ​​connection with the connecting frame 142 allows for easy replacement.

[0059] The roller assembly 20 cleans the surface of the curtain wall by rolling, thus forming a rolling structure. In addition to cleaning the roller assembly 20 with cleaning fluid, the support body 19 is further provided with a scraper mechanism 13 extending beyond the wall of the cleaning chamber 11. The scraper mechanism 13 abuts against the cylindrical cleaning surface of the roller assembly 20. The scraper mechanism 13 protrudes towards the roller assembly 20 to scrape the surface of the roller assembly 20, thereby scraping away dirt and wastewater contained in the surface layer of the roller assembly 20. This ensures that each time the roller assembly 20 rubs against the surface of the curtain wall, the surface quality is a clean surface, further improving the cleaning effect.

[0060] Preferably, the scraping mechanism 13 is configured as at least one scraping rib 131 extending along the length of the cleaning chamber 11. The scraping rib 131 is located in the direction in which the roller assembly 20 rotates away from the surface to be cleaned, such as a curtain wall or ceiling. The end of the scraping rib 131 abuts against and presses against the surface of the roller assembly 20 to improve scraping tightness. Preferably, the end of the scraping rib 131 is provided with a scraping curved surface that adapts to the surface of the roller assembly 20. Preferably, the radius of the scraping curved surface is smaller than the radius of the roller assembly 20, forming a water-blocking structure and improving the effectiveness of scraping and pressing. Optionally, the scraping rib 131 is positioned away from the opening of the cleaning chamber 11. The scraping rib 131, together with the roller assembly 20, divides the cleaning chamber 11 into a clean water space and a wastewater space, wherein the volume of the clean water space is larger than the volume of the wastewater space to improve cleaning efficiency and increase the collection speed of wastewater.

[0061] The negative pressure cleaning device moves along the plane to be cleaned under the drive of the driving component. The width of the driving component is smaller than the width of the negative pressure cleaning device to ensure that the power unit does not pass over uncleaned areas and accumulate dust, thus preventing secondary pollution. Specifically, the negative pressure cleaning device, as a functional unit for cleaning operations, is positioned at the front of the robot's running direction, ensuring that all other external trajectories on the running path are included within the cleaning trajectory. Preferably, the turning radius at the center of the negative pressure cleaning device is less than or equal to 550 mm.

[0062] In one embodiment, a collision avoidance beam mechanism 16 is provided on the edge of the cleaning rack 10, and the collision avoidance beam mechanism 16 is located in the moving forward direction of the cleaning rack 10. The collision avoidance beam mechanism 16 is a protruding structure of the support body 19, used for collision detection of the front end without crossing obstacles, and also serves as a collision protection function.

[0063] In an optional embodiment, the cleaning rack 10 includes a base plate 18, a support body 19 detachably mounted on the base plate 18, and the base plate 18 extending beyond the edge of the support body 19 to form a crash beam mechanism 16. A wiping cloth component 15 is mounted on the base plate 18 and located on opposite sides of the support body 19. Preferably, the base plate 18 is equipped with spaced-apart snap-fit ​​components, and the support body 19 is pressed and fixed to the base plate 18 by the snap-fit ​​components to form a detachable assembly structure. The roller assembly 20 is mounted on the support body 19 for easy replacement, improving the convenience of replacement. Optionally, the base plate 18 and the support body 19 are configured as separate structures, allowing for easy detachable mounting of the wiping cloth component 15 to the base plate 18, improving the efficiency of replacing vulnerable parts.

[0064] Furthermore, the return water diaphragm pump 41 and the supply water pump 32 are installed on the base plate 18 and located outside the support body 19. The return water diaphragm pump 41 and the supply water pump 32 are respectively connected to the support body 19 through pipelines for easy assembly and maintenance.

[0065] Example 5

[0066] like Figures 1 to 5 As shown, the negative pressure component 50 is used to create negative pressure in the cleaning chamber 11, thereby building pressure for automatic adsorption, ensuring positive pressure for cleaning, and reducing the burden on the robot.

[0067] In one embodiment, a negative pressure component 50 is mounted on a cleaning rack 10. The cleaning rack 10 is provided with a negative pressure channel 17 communicating with the negative pressure component 50. The negative pressure channel 17 gradually increases in size from the negative pressure component 50 toward the cleaning chamber 11. The negative pressure component 50 is used to guide the airflow out of the negative pressure channel 17 to form a negative pressure adsorption force within the cleaning chamber 11. The negative pressure channel 17 has a triangular spatial structure to expand the negative pressure adsorption range, thereby increasing the adsorption effect.

[0068] Preferably, the negative pressure component 50 is located in the middle region of the cleaning rack 10 to ensure that the overall adsorption force of the negative pressure component 50 on the cleaning rack 10 is balanced, thereby improving the uniformity of the adsorption force. Preferably, the negative pressure channel 17 protrudes outward from the cleaning chamber 11 to allow the negative pressure component 50 to guide airflow and maintain sufficient airflow convergence space, thereby increasing the negative pressure.

[0069] In an optional embodiment, the negative pressure assembly 50 includes a negative pressure fan 51 and a protective cover 52 enclosing the negative pressure fan 51. The protective cover 52 is detachably connected to the cleaning rack 10 and has multiple ventilation grilles. The negative pressure fan 51 is used to extract gas from the cleaning chamber to create a negative pressure environment. The protective cover 52 provides protection for the negative pressure fan 51 and establishes an airflow output path. Optionally, the negative pressure fan 51 is mounted on the cleaning rack 10, and the protective cover 52 is enclosing the negative pressure fan 51 and connected to the cleaning rack 10 to form a sequential assembly structure. Optionally, the negative pressure fan 51 is mounted on the protective cover 52, and the protective cover 52 is mounted on the cleaning rack 10 to form an integral assembly structure.

[0070] Example 6

[0071] The roller assembly 20 cleans the surface of the curtain wall by rolling. In one embodiment, the roller assembly 20 includes a roller component 22 rotatably connected to the cleaning frame 10 and a roller drive component 21 mounted on one end of the cleaning frame 10. The roller drive component 21 is drivenly connected to the roller component 22. The roller component 22 is rotatably connected to the cleaning frame 10, wherein the columnar cleaning portion of the roller component 22 is located within the cleaning chamber 11, and the shaft end of the roller component 22 extends out of the cleaning frame 10 and is connected to the roller drive component 21 to drive rotation. Preferably, the roller drive component 21 is configured as a roller motor and a synchronous belt mechanism connected to the roller motor, and the shaft end of the roller component 22 is connected to the synchronous belt mechanism to achieve self-driven operation of the roller assembly 20. Preferably, the roller motor is mounted on the base plate 18.

[0072] Example 7

[0073] The above-disclosed embodiments are applied to a curtain wall cleaning robot, wherein the curtain wall cleaning robot includes a robot body 60 and a closed-loop self-cleaning negative pressure cleaning device, and a cleaning frame 10 is installed on the robot body 60 so that the robot components drive the negative pressure cleaning device to move.

[0074] For illustrative purposes, the foregoing description uses specific names to provide a thorough understanding of the embodiments. However, it will be apparent to those skilled in the art that specific details are not required to practice the embodiments. Therefore, for purposes of illustration and description, the foregoing description of specific embodiments herein is presented. These descriptions are not intended to be exhaustive or to limit the embodiments to the precise forms disclosed. It will be apparent to those skilled in the art that many modifications and variations are possible in light of the teachings above. Furthermore, when used herein to refer to the location of components, the terms above and below, or their synonyms, do not necessarily refer to absolute locations relative to external references, but rather to the relative locations of the components with reference to the accompanying drawings.

[0075] Furthermore, the foregoing figures and descriptions include numerous concepts and features that can be combined in various ways to achieve a variety of beneficial effects and advantages. Therefore, features, components, elements, and / or concepts from various different figures can be combined to produce embodiments or implementations that are not necessarily shown or described in this specification. Moreover, in any particular embodiment and / or implementation, not all features, components, elements, and / or concepts shown in the specific figures or descriptions are necessarily required. It should be understood that such embodiments and / or implementations fall within the scope of this specification.

Claims

1. A closed-loop self-cleaning negative pressure cleaning device, characterized in that, include: A cleaning rack with a cleaning chamber; A roller assembly rotatably mounted on the cleaning rack, the roller assembly being located within the cleaning chamber and partially extending beyond the opening of the cleaning chamber; The cleaning rack is equipped with a negative pressure component, a water supply component, and a water return component. The water supply component and the water return component are respectively connected to the cleaning chamber. The water supply component is used to spray cleaning liquid into the cleaning chamber, and the water return component is used to recover the mixed liquid in the cleaning chamber. The negative pressure component is connected to the cleaning chamber and forms a negative pressure environment in the cleaning chamber. The negative pressure component draws gas out of the cleaning chamber to form a negative pressure environment. The negative pressure component constructs a pressure field, and combined with the action of airflow and wind force, achieves dynamic sealing of the negative pressure cleaning device. The cleaning rack is provided with a negative pressure channel connected to the negative pressure component. The negative pressure channel gradually increases in size from the negative pressure component towards the cleaning chamber. The negative pressure component is located in the middle area of ​​the cleaning rack, and the negative pressure channel protrudes outward from the cleaning chamber. The cleaning rack is equipped with a scraper mechanism that extends beyond the wall of the cleaning chamber. The scraper mechanism abuts against the cylindrical cleaning surface of the roller assembly. The scraper mechanism is a scraper rib extending along the length of the cleaning chamber. The scraper rib is located in the direction in which the roller assembly rotates away from the surface to be cleaned. The end of the scraper rib abuts against and presses against the surface of the roller assembly. The end of the scraper rib is provided with a scraper curved surface. The radius of the scraper curved surface is smaller than the radius of the roller assembly. The scraper rib is located away from the opening of the cleaning chamber. The scraper rib, together with the roller assembly, divides the cleaning chamber into a clean water space and a wastewater space, wherein the volume of the clean water space is larger than the volume of the wastewater space. The water return component recovers and filters the mixed liquid in the cleaning chamber and is connected to the water supply component. The water return assembly includes a water return diaphragm pump installed on the cleaning rack, a water return pipe connecting the water return diaphragm pump and the cleaning chamber, and a filter installed on the water return pipe. The water return diaphragm pump is connected to the water supply assembly.

2. The closed-loop self-cleaning negative pressure cleaning device according to claim 1, characterized in that, The water supply assembly is connected to the direction of movement of the cleaning chamber.

3. The closed-loop self-cleaning negative pressure cleaning device according to claim 1, characterized in that, The water supply component and the water return component are installed at intervals at one end of the cleaning rack and extend towards the other end.

4. The closed-loop self-cleaning negative pressure cleaning device according to claim 1, characterized in that, The water supply assembly includes a mixing tank for mixing the cleaning solution, a spray mechanism installed on the cleaning rack, and a water pump connecting the mixing tank and the spray mechanism. The spray mechanism faces the cleaning chamber, and the spray mechanism and the negative pressure assembly are located on opposite sides of the rotation center line of the roller assembly.

5. The closed-loop self-cleaning negative pressure cleaning device according to claim 4, characterized in that, The water return assembly is connected to the mixing tank.

6. The closed-loop self-cleaning negative pressure cleaning device according to claim 1, characterized in that, The cleaning rack includes a support body and a wiping cloth component mounted on the support body. The cleaning cavity is an opening formed by recessing the support body surface for conforming to the surface to be cleaned. The wiping cloth component is arranged around the cleaning cavity and is used to conform to the surface to be cleaned. At least a portion of the roller assembly elastically extends beyond the surface of the wiping cloth component.

7. The closed-loop self-cleaning negative pressure cleaning device according to claim 6, characterized in that, The cleaning rack includes a scraping device mounted on the support body, the scraping device being located behind the cleaning rack in the direction of movement.

8. The closed-loop self-cleaning negative pressure cleaning device according to claim 1, characterized in that, The edge of the cleaning rack is provided with a collision protection beam mechanism, which is located in the direction of movement of the cleaning rack.

9. The closed-loop self-cleaning negative pressure cleaning device according to claim 1, characterized in that, The negative pressure assembly includes a negative pressure fan and a protective cover installed on the negative pressure fan. The protective cover is detachably connected to the cleaning rack and is provided with multiple ventilation grilles.

10. The closed-loop self-cleaning negative pressure cleaning device according to claim 1, characterized in that, The roller assembly includes a roller component rotatably connected to the cleaning rack and a roller drive component installed at one end of the cleaning rack, wherein the roller drive component is drivenly connected to the roller component.

11. A curtain wall cleaning robot, characterized in that, It includes a robot body and a closed-loop self-cleaning negative pressure cleaning device as described in any one of claims 1-10, wherein the cleaning rack is mounted on the robot body.

Images