Cleaning robot

Abstract

A cleaning robot relates to the technical field of intelligent cleaning equipment and comprises a machine body and cleaning rag arranged at the bottom of the machine body, the machine body is provided with a suction module used for enabling the machine body to be adsorbed on a to-be-cleaned surface and a driving module used for driving the machine body to move on the to-be-cleaned surface, and the machine body is provided with a wetting device. The wetting device is used for supplying wetting media to the back face of the cleaning rag or an interlayer space between the back face of the cleaning rag and the bottom surface of the machine body so that the cleaning rag can be kept wet in the advancing process. The wetting medium is directly supplied to the back surface of the cleaning rag or the interlayer space between the back surface of the cleaning rag and the bottom surface of the machine body, so that the cleaning rag is kept wet in the advancing process; the problems that the wetting effect is poor and the cleaning effect is not ideal due to the fact that sprayed water is blown away by wind or evaporated when an existing cleaning robot cleans the surface of window glass can be solved.

Description

Technical Field

[0001] This utility model relates to the field of intelligent cleaning equipment technology, and in particular to a cleaning robot. Background Technology

[0002] Chinese patent document CN118766340A discloses a cleaning robot with nozzles on its front and rear sides. These nozzles spray water onto the surface to be cleaned during movement, thus wetting the surface and reducing cleaning difficulty. However, most existing window cleaning robots (including those with fixed cleaning cloths or rotating cleaning discs (such as those with cloths / sponges) at the bottom) use this structure, where nozzles are placed on the outside of the machine to spray clean water onto the glass windows via ultrasonic atomization. This design has several problems. The area wetted is relatively limited, resulting in less than ideal cleaning effectiveness. Especially when cleaning high-rise exterior glass walls, in windy conditions, the water sprayed from the nozzles is easily blown away or evaporates before reaching the surface, failing to effectively wet the surface and the cleaning cloth, thus affecting cleaning quality. Furthermore, when the machine moves to the window glass edge, the water sprayed from the nozzles may fall onto the window frame, causing dripping, which negatively impacts the user experience of cleaning indoor glass. Utility Model Content

[0003] The purpose of this invention is to provide a cleaning robot to improve the problem that existing cleaning robots have poor wetting effect and unsatisfactory cleaning effect when cleaning window glass surfaces because the sprayed water is blown away by the wind or evaporates.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a cleaning robot, comprising a body and a cleaning cloth disposed at the bottom of the body, wherein the body is provided with a suction module for adhering to the surface to be cleaned and a drive module for moving the cleaning cloth on the surface to be cleaned, and a wetting device is provided on the body, wherein the wetting device is used to supply a wetting medium to the back of the cleaning cloth or the interlayer space between the back of the cleaning cloth and the bottom surface of the body, so as to keep the cleaning cloth moist during movement.

[0005] Furthermore, the back of the cleaning cloth is provided with a liquid guiding groove for the flow of wetting medium.

[0006] Furthermore, the wetting device includes a sprayer and a liquid supply device connected to the sprayer, wherein the sprayer is located at the bottom of the machine body.

[0007] Furthermore, the sprayer is located above the cleaning cloth, and the spraying direction is toward the back of the cleaning cloth or the interlayer space between the back of the cleaning cloth and the bottom surface of the machine body.

[0008] Furthermore, the sprayer is located at the front end and / or rear end of the machine body in the direction of travel.

[0009] Furthermore, the number of sprayers is multiple, and they are distributed at intervals along a direction perpendicular to the direction of travel of the machine body.

[0010] Furthermore, the bottom of the machine body is provided with a groove, the sprayer is embedded in the groove, and the opening of the groove faces the cleaning cloth.

[0011] Furthermore, the groove is provided with a guide slope to guide the wetting medium to the cleaning cloth.

[0012] Furthermore, the drive module includes a transmission belt, a transmission wheel, and a motor that drives the transmission wheel to rotate, with the transmission belt looped around the transmission wheel.

[0013] Furthermore, the bottom of the machine body is constructed with a chamber, and the air in the chamber is drawn out by the suction module to form a negative pressure, thereby adsorbing it onto the surface to be cleaned.

[0014] This invention employs a novel wetting method, different from traditional external nozzles, instead of spraying water directly onto the surface to be cleaned. Specifically, a wetting device is integrated into the machine body, supplying a wetting medium directly to the back of the cleaning cloth or the space between the back of the cleaning cloth and the bottom surface of the machine body. This design ensures the cleaning cloth remains continuously moist during operation, avoiding the problem of the wetting medium being blown away or evaporated in windy conditions, as is common with traditional spraying methods. Compared to existing technologies, this invention ensures the cleaning cloth remains appropriately moist, thus improving cleaning effectiveness. Furthermore, when cleaning indoor windows, this invention avoids dripping water from spraying onto the window frame, providing a better user experience. Attached Figure Description

[0015] Figure 1 Diagram of the bottom structure of the cleaning robot Figure 1 ;

[0016] Figure 2 This is a schematic diagram of the top structure of a cleaning robot.

[0017] Figure 3 An exploded view of the cleaning robot;

[0018] Figure 4 Diagram of the bottom structure of the cleaning robot Figure 2 The cleaning cloth is omitted here;

[0019] Figure 5 A three-dimensional diagram of the organism;

[0020] Figure 6 A 3D view of the mounting base;

[0021] Figure 7 This is a 3D view of the sprayer.

[0022] In the picture:

[0023] 1—Body 1a—Groove

[0024] 2 - Cleaning cloth 3 - Suction module

[0025] 4 - Drive Module 5 - Sprayer

[0026] 5a – Nozzle 6 – Liquid supply equipment

[0027] 6a – Liquid storage tank; 6b – Liquid pump

[0028] 7—Mounting base 7a—Liquid inlet. Detailed Implementation

[0029] To facilitate a clearer understanding of the concept of this utility model by those skilled in the art, the following description, in conjunction with embodiments and accompanying drawings, will provide a further explanation.

[0030] like Figure 1-7 As shown, the cleaning robot in this embodiment mainly includes a suction module 3, a drive module 4, a controller, and a body 1. The bottom of the body 1 has a chamber. The suction module 3 draws air from the chamber to create negative pressure, allowing the robot to adhere to the surface to be cleaned. The suction module 3 includes, but is not limited to, a negative pressure fan or a vacuum pump. The drive module 4 includes a transmission belt, a transmission wheel, and a motor that drives the transmission wheel to rotate. The transmission belt is wrapped around the outer edge of the transmission wheel. When the body 1 adheres to the surface to be cleaned, the transmission belt is in direct contact with the surface, and friction transmission enables the body 1 to move directionally along the surface. A cleaning cloth 2 is also provided at the bottom of the body 1 for contacting the surface to be cleaned and performing the cleaning function. The aforementioned surface to be cleaned includes, but is not limited to, the surface of a panel, such as a vertical glass window or a glass curtain wall. This embodiment mainly uses a glass window as an example. Furthermore, the overall shape of the cleaning robot in this embodiment adopts a square (rectangular or square) outer contour, but this design can be adjusted to other shapes according to actual needs. As for the air duct, walking mechanism, and control circuit of the cleaning robot, this embodiment is similar to the existing cleaning robots, and will not be described in detail for the sake of simplicity.

[0031] Unlike existing cleaning robots, this embodiment does not have nozzles on the side of the body 1 to spray water and wet the surface to be cleaned. Instead, a wetting device is installed on the body 1. This wetting device can directly supply wetting medium to the back of the cleaning cloth 2 or the space between the back of the cleaning cloth 2 and the bottom surface of the body 1, thus keeping the cleaning cloth 2 moist throughout its movement. This direct wetting of the cleaning cloth 2 eliminates the problem of the wetting medium being blown away or evaporating by the wind on a windy glass surface. It effectively improves the problem of poor wetting and unsatisfactory cleaning results caused by the water being blown away or evaporating by the wind when cleaning window glass surfaces with existing cleaning robots. Moreover, when cleaning indoor windows, the cleaning robot of this embodiment will not drip water from spraying water onto the window frame, thus providing a better user experience.

[0032] When the wetting device supplies a wetting medium to the back of the cleaning cloth 2 or the interlayer space between the back of the cleaning cloth 2 and the bottom surface of the machine body 1, the wetting medium can penetrate into the cleaning cloth 2 and diffuse to the surrounding area, thereby achieving a larger area of ​​wetting. However, in order to further expand the wetting area of ​​the cleaning cloth 2 and improve the wetting efficiency, a liquid guiding groove (including but not limited to V-shaped, U-shaped, or trapezoidal cross-sections) can be provided on the back of the cleaning cloth 2. In this way, under the guidance of the liquid guiding groove, the wetting medium can flow directionally along a preset path and diffuse evenly to the target wetting area of ​​the cleaning cloth 2, thereby achieving a larger area of ​​uniform wetting effect. At the same time, the guiding effect of the liquid guiding groove can significantly improve the wetting efficiency of the wetting medium on the cleaning cloth 2. In addition, the liquid guiding groove can be formed by hot pressing to create a groove on the back of the cleaning cloth 2.

[0033] The wetting device mainly includes a sprayer 5 and a liquid supply device 6. The sprayer 5 is located at the bottom of the body 1, and the liquid supply device 6 is located inside the body 1 and connected to the sprayer 5 through a pipe to supply the wetting medium. The sprayer 5 can be a nozzle (e.g., an atomizing nozzle, a water spray nozzle) or a microporous permeation structure. The liquid supply device 6 includes a liquid storage tank 6a and a liquid pump 6b. The wetting medium is water, cleaning liquid, or steam. This embodiment mainly uses the sprayer 5 as a nozzle and water as the wetting medium for explanation.

[0034] In this embodiment, the sprayer 5 is positioned above the cleaning cloth 2 at a preset distance. Its spray direction is adjustable, allowing for differentiated wetting effects based on different tilt angles. Specifically, it includes the following two operating modes: First, horizontal or upward tilting spray mode: When the axis of the sprayer 5 is parallel to the back of the cleaning cloth 2 or forms an upward tilt angle of 0° to 45°, the wetting medium is mainly sprayed into the interlayer space formed by the back of the cleaning cloth 2 and the bottom of the machine body 1. This mode utilizes the sealed characteristics of the interlayer space to form a medium storage area, achieving a slow-release penetration effect of the wetting medium. Second, downward tilting spray mode: When the axis of the sprayer 5 is tilted downwards relative to the back of the cleaning cloth 2 at 5° to 90° (e.g., 10° to 60°), the wetting medium is directly sprayed onto the back of the cleaning cloth 2. This mode enables rapid wetting of the medium, allowing the wetting liquid to reach the cloth fiber layer directly, meeting immediate cleaning needs.

[0035] The sprayer 5 can be positioned at the front and / or rear end of the robot body 1 in the direction of travel (e.g., the front and / or rear sides of the robot body 1) to adapt to different cleaning needs. Front-end placement: pre-wets the surface to be cleaned before the robot moves, reducing the adhesion of stains and facilitating subsequent wiping; Rear-end placement: replenishes moisture after cleaning to prevent surface drying and residual stains; Simultaneous front and rear-end placement: suitable for highly polluted environments, ensuring the surface remains moist throughout the cleaning process. Specifically, front-end spraying can coordinate with the movement of the cleaning cloth 2 to achieve a continuous "pre-wetting-wiping" action; rear-end spraying can compensate for moisture loss due to evaporation from the cloth, suitable for high-temperature or low-humidity environments.

[0036] The number of sprayers 5 can be one or more. In this embodiment, multiple sprayers 5 are used, and these sprayers 5 are arranged at intervals along a direction perpendicular to the traveling direction of the machine body 1 (i.e., laterally, equivalent to the left-right direction of the machine body 1), which ensures that the wetting medium almost covers the entire width of the cleaning cloth 2. The spacing between adjacent sprayers 5 can be adjusted to a suitable distance according to the standard of avoiding wetting blind spots. A single sprayer 5 may result in over-wetting in the middle and insufficient wetting on both sides, while the distribution of multiple sprayers 5 can balance the wetting effect, and multiple sprayers 5 are suitable for wide cleaning cloths.

[0037] Normally, the sprayer 5 can be directly installed at the bottom of the body 1, with its nozzle flush with the bottom surface of the body 1. However, when the cleaning cloth 2 is pressed against the surface to be cleaned by the body 1, the back of the cleaning cloth 2 will stick tightly to the nozzle of the sprayer 5, thus affecting its normal water output. To avoid this, a groove 1a (the cross-sectional shape of the groove 1a can be V-shaped, U-shaped, or trapezoidal, etc.) can be provided at the bottom of the body 1, and the sprayer 5 can be embedded in the groove 1a. See [reference needed]. Figure 3In this way, the nozzle of the sprayer 5 is concealed within the groove 1a, preventing it from being covered or blocked by the cleaning cloth 2. The opening of the groove 1a faces the cleaning cloth 2, allowing the wetting medium sprayed by the sprayer 5 to be directly directed to the target area (cleaning cloth 2). The sprayer 5 can spray the wetting medium directly onto the cleaning cloth 2, or it can spray the wetting medium into the groove 1a, which is then guided onto the cleaning cloth 2 through the inner wall of the groove 1a. The depth of the groove 1a can be configured to be slightly greater than the length of the sprayer 5 to prevent the sprayer 5 from protruding and affecting the robot's movement. A waterproof coating can be applied to the inner wall of the groove 1a to prevent the wetting medium from seeping into the body 1. This embedded design reduces the overall thickness of the machine and also prevents the exposed sprayer 5 from being damaged by collisions or splashing media.

[0038] When the sprayer 5 sprays the wetting medium into the groove 1a at the bottom of the body 1, the space enclosed by the groove 1a and the cleaning cloth 2 is the interlayer space between the back of the cleaning cloth 2 and the bottom surface of the body 1, as mentioned above. This interlayer space can temporarily store and slowly release the wetting medium.

[0039] The groove 1a serves both as a water storage area and an effective guide for the wetting medium. On one hand, when the sprayer 5 experiences a spray delay, the water stored in the groove 1a continues to wet the cleaning cloth 2, ensuring it remains moist throughout its movement. On the other hand, the groove 1a contains a guide slope, whose main function is to quickly guide the wetting medium to the cleaning cloth 2, preventing excessive accumulation and thus avoiding spray delays caused by buildup. The angle of the guide slope is typically 30°–60° (this angle usually refers to the downward angle of the slope relative to the horizontal plane when the unit 1 is attached to the vertical glass). This design allows the wetting medium to flow naturally towards the cloth under gravity. To further accelerate the flow of the wetting medium, the surface of the slope can be hydrophobically treated, for example, with a PTFE coating. With this design, the groove 1a can store a certain amount of wetting medium to cope with the spraying delay, and the guide slope can ensure that the wetting medium flows quickly and evenly to the cleaning cloth 2, thereby achieving a highly efficient wetting effect.

[0040] In this embodiment, each groove 1a can be configured with one sprayer 5, or multiple sprayers 5 can be configured in one groove 1a. Taking the configuration of multiple sprayers 5 in a single groove 1a as an example, the groove 1a located at the bottom of the body 1 is designed as a strip structure. This groove 1a can extend through to the side opposite to the cleaning cloth 2 (i.e., the upper end of the groove 1a), as shown in the figure. Figure 5 A strip-shaped mounting base 7 is installed in the groove 1a. This mounting base 7 closes the upper end of the groove 1a but does not extend beyond the lower end of the groove 1a. (See also...) Figure 2 , 46. Thus, the lower surface of the mounting base 7 forms the top wall of the groove 1a. Multiple sprayers 5 are mounted on the mounting base 7, with their nozzles all facing the opening at the lower end of the groove 1a. By assembling the sprayers 5 and the mounting base 7 as a whole, and then detachably installing the mounting base 7 from the body 1, the installation and replacement of the sprayers 5 can be facilitated. This design not only improves the convenience of assembly but also facilitates the maintenance and replacement of the sprayers 5.

[0041] In addition, such as Figure 6 As shown, a liquid delivery channel extending along its length can be provided inside the upper end of the mounting base 7, and an inlet 7a is provided on this channel. Each sprayer 5 mounted on the mounting base 7 is connected to this liquid delivery channel. This inlet 7a is connected to a liquid supply device 6 via a pipe, thereby achieving unified liquid supply to all sprayers 5 on the mounting base 7. Figure 7 As shown, each sprayer 5 has a vertically penetrating spray hole 5a inside. The diameter of the spray hole 5a gradually increases from top to bottom, forming a cone shape, and the large diameter end (i.e. the nozzle) of the spray hole 5a faces the cleaning cloth 2.

[0042] The above embodiments are preferred implementations of this utility model. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A cleaning robot, comprising a body (1) and a cleaning cloth (2) disposed at the bottom of the body (1), wherein the body (1) is provided with a suction module (3) for adhering to the surface to be cleaned and a drive module (4) for moving the cloth on the surface to be cleaned, characterized in that: The machine body (1) is provided with a wetting device, which is used to supply a wetting medium to the back of the cleaning cloth (2) or the interlayer space between the back of the cleaning cloth (2) and the bottom surface of the machine body (1) so that the cleaning cloth (2) remains moist during travel.

2. The cleaning robot according to claim 1, wherein: The back of the cleaning cloth (2) is provided with a liquid guide groove for the flow of wetting medium.

3. The cleaning robot of claim 1, wherein: The wetting device includes a sprayer (5) and a liquid supply device (6) connected to the sprayer (5), wherein the sprayer (5) is located at the bottom of the body (1).

4. The cleaning robot according to claim 3, wherein: The sprayer (5) is located above the cleaning cloth (2), and the spraying direction is towards the back of the cleaning cloth (2) or the interlayer space between the back of the cleaning cloth (2) and the bottom surface of the machine body (1).

5. The cleaning robot according to claim 3, characterized in that: The sprayer (5) is located at the front end and / or rear end of the machine body (1) in the direction of travel.

6. The cleaning robot of claim 3, wherein: The number of sprayers (5) is multiple, and they are distributed at intervals along a direction perpendicular to the direction of travel of the machine body (1).

7. The cleaning robot according to claim 3 or 6, characterized in that: The bottom of the body (1) is provided with a groove (1a), the sprayer (5) is embedded in the groove (1a), and the opening of the groove (1a) faces the cleaning cloth (2). 8.The cleaning robot according to claim 7, wherein: The groove (1a) is provided with a guide slope for guiding the wetting medium to the cleaning cloth (2).

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