Window cleaning machine

Abstract

The invention provides a window cleaning machine which is characterized in that a containing space is formed in a main body, a first gap is formed in a shell wall, the containing space comprises a first space and a second space, and the first space is used for vacuumizing so that the window cleaning machine can be adsorbed to a to-be-cleaned surface; a second gap exists between the first space and the second space, and when the first space is vacuumized, the second space is passively vacuumized through the second gap to form a negative pressure state; the bottom shell is provided with an air inlet channel and an exhaust channel. The air inlet channel is used for relieving pressure of the second space and relieving pressure of the first gap, and the air exhaust channel is used for exhausting air flow in the second space. On the basis of double-space gap communication and a passive negative pressure cooperation mechanism, negative pressure is passively formed through the gap while the to-be-cleaned surface is vacuumized and adsorbed, so that airflow circulation is achieved, the requirements for adsorption and fixation of equipment and heat dissipation of internal components are synchronously met, and therefore the adsorption stability of the window cleaning machine and the operation safety of core components are better balanced.

Description

Technical Field

[0001] This application relates to the field of cleaning equipment technology, and in particular to a window cleaning machine. Background Technology

[0002] With the development of technology and the improvement of living standards, people have higher and higher requirements for quality of life, and intelligent and efficient window cleaning machines are becoming increasingly popular among users. A household window cleaning machine is a cleaning tool specifically designed for home users, mainly used for cleaning windows and glass surfaces.

[0003] However, external moisture, dust, and other dirt can easily enter the machine and affect its performance.

[0004] Application content In view of this, this application proposes a window cleaning machine to solve the above problems, and the specific solution is as follows: A window cleaning machine, comprising: The main body has an internal accommodating space, and a first gap is formed on the shell wall of the main body. The accommodating space includes a first space and a second space. The first space is used to create a vacuum so that the window cleaning machine can adhere to the surface to be cleaned. The second space is at least partially located outside the first space and is used to accommodate components. There is a second gap between the first space and the second space. When the first space is evacuated, the second space is passively evacuated through the second gap to form a negative pressure state. The main body is provided with an air intake channel and an exhaust channel that are both connected to the second space; the air intake channel is used to depressurize the second space and the first gap, and the exhaust channel is used to discharge the airflow in the second space.

[0005] In some specific embodiments, the main body includes a bottom shell and an upper shell connected to the bottom shell. The bottom shell and the upper shell are connected to form the receiving space. The first gap includes a connecting seam formed at the connection between the bottom shell and the upper shell. When the air intake channel causes the second space to depressurize, the air intake channel causes the connecting seam to depressurize.

[0006] In some specific embodiments, the window cleaning machine further includes: a walking device, which is connected to the main body via a rotating shaft. There is a second gap between the rotating shaft and the bottom shell, so that the rotating shaft can rotate. The second gap allows the second space to be passively evacuated to form a negative pressure state when the first space is evacuated.

[0007] In some specific embodiments, the second space includes a first part and a second part for accommodating components, wherein the driving device and transmission device on the main body are located within the first part, and the second part is located on the periphery of the first part; The transmission device includes the rotating shaft and is connected to the walking device via the rotating shaft; the drive device is at least partially exposed in the second part, and the drive device generates heat when it is in operation, heating the airflow so that the heated airflow is discharged from the exhaust passage.

[0008] In some specific embodiments, the size of the second gap between the rotating shaft and the bottom shell is smaller than the opening size of the first space, so that the negative pressure in the second space is less than the negative pressure in the first space; When the window cleaning machine is working, the airflow in the second space flows into the first space to remove heat from the drive device and reduce the temperature of the drive device.

[0009] In some specific embodiments, the window cleaning machine also includes a water-blocking strip, which is disposed around the air intake channel to restrict external water from entering the air intake channel.

[0010] In some specific embodiments, the window cleaning machine further includes a guide groove located around the water-blocking strip for collecting accumulated water from the outside.

[0011] In some specific embodiments, the sidewall of the guide channel away from the water-blocking strip is inclined outward to facilitate the drainage of accumulated water in the guide channel to the outside.

[0012] In some specific embodiments, a liquid storage cavity is formed inside the main body corresponding to the air intake channel, so that the water entering the air intake channel is stored in the liquid storage cavity.

[0013] In some specific embodiments, the water-blocking strip is inclined toward the inner wall of the air intake channel toward the liquid storage cavity.

[0014] In some specific embodiments, a negative pressure device is also included, which is disposed on the main body; An adsorption space is formed inside the walking device, and the adsorption space is connected to the first space; the negative pressure device evacuates the adsorption space through the first space, so that the window cleaning machine adsorbs onto the surface to be cleaned.

[0015] Beneficial Effects: This application provides a window cleaning machine based on a dual-space gap connection and passive negative pressure synergy mechanism. While vacuuming and adsorbing the surface to be cleaned, it passively generates negative pressure through the second gap, thereby achieving airflow circulation. This eliminates the need for an additional negative pressure source and heat dissipation components, simultaneously meeting the equipment's adsorption and fixation requirements and the heat dissipation needs of internal components. This better balances the adsorption stability and core component operational safety of the window cleaning machine, avoiding the conflicts between adsorption and heat dissipation functions and the complex structure of traditional equipment, thus improving the equipment's reliability and energy efficiency. By utilizing the air intake channel to depressurize the first gap, the second gap structure transforms the disadvantage of incomplete sealing into a favorable condition where the negative pressure in the first space drives airflow circulation in the second space. This solves the problem of moisture, dust, and other dirt easily entering the main body, while simultaneously fulfilling the core adsorption requirement of the first space and incidentally achieving heat dissipation for components in the second space. The adsorption and airflow circulation functions are interdependent; the adsorption in the first space provides airflow power for the second space, and the airflow circulation in the second space can further generate functions such as heat dissipation and water prevention, improving the equipment's reliability and practicality. The multi-layered water-prevention system, from external blocking, peripheral collection, and rapid drainage to internal guidance and ultimate storage, comprehensively blocks the path of water accumulation into the air intake channel and the equipment interior, ensuring the safe operation of core components such as drive units and transmission devices, and reducing the risk of failure. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the window cleaning machine of this application; Figure 2 This is an example diagram of the disassembled structure of the window cleaning machine of this application; Figure 3 This is a perspective example of the positional relationship of the driving device in this application; Figure 4 This is another example diagram showing the positional relationship of the drive unit in this application; Figure 5 This is a schematic diagram of the spatial division in this application; Figure 6 This is a three-dimensional cross-sectional schematic diagram of the window cleaning machine of this application; Figure 7 This is a schematic diagram of the second gap size and the first space opening in this application; Figure 8 This is a schematic diagram of the cross-section and gas flow of the window cleaning machine in this application; Figure 9 This application Figure 8 Enlarged structural diagram of region D in the middle; Figure 10 This is a schematic diagram of the multiple water-blocking structure in this application.

[0017] Reference numerals: 1-Main body; 2-Walking device; 3-Negative pressure device; 4-Drive device; 5-Transmission device; 11-Bottom shell; 12-Upper shell; 13-Upper cavity of channel; 14-Lower cavity of channel; 15-Intake channel; 16-Exhaust channel; 51-Rotating shaft; 6-Water baffle; 7-Guide groove; 8-Liquid storage chamber; A1-First space; A2-Second space; A21-First part; A22-Second part; A3-First gap; A4-Second gap. Detailed Implementation

[0018] The various embodiments disclosed herein will be described more fully below. This application may have various embodiments, and adjustments and changes may be made therein. However, it should be understood that there is no intention to limit the various embodiments disclosed herein to the specific embodiments disclosed herein, but rather this application should be understood to cover all adjustments, equivalents, and / or alternatives falling within the spirit and scope of the various embodiments disclosed herein.

[0019] This application discloses a window cleaning machine, the structure of which at different angles is shown in the attached instruction manual. Figure 1-7 As shown. The specific solution is as follows: A window cleaning machine, comprising: The main body 1 has an internal accommodating space and a first gap is formed on the shell wall of the main body 1. The accommodating space includes a first space and a second space. The first space is used to create a vacuum so that the window cleaning machine can be adsorbed onto the surface to be cleaned. The second space is at least partially located outside the first space and is used to accommodate components. There is a second gap between the first space and the second space. When the first space is evacuated, the second space is passively evacuated through the second gap to form a negative pressure state. The main body 1 is provided with an air intake channel 15 and an exhaust channel 16, both of which are connected to the second space. The air intake channel 15 is used to depressurize the second space and the first gap, while the exhaust channel 16 is used to discharge the airflow from the second space. The first gap is shown in the attached figure. Figure 1 As shown in area A3, the second gap is as attached. Figure 3 As shown in region A4.

[0020] In some embodiments, the main body 1 includes a bottom shell 11 and an upper shell 12 connected to the bottom shell 11. The bottom shell 11 and the upper shell 12 are connected to form an accommodating space. The first gap includes a connecting seam formed at the connection between the bottom shell 11 and the upper shell 12. When the air intake channel 15 depressurizes the second space, the air intake channel 15 depressurizes the connecting seam. The first gap specifically refers to a structural gap on the shell wall of the main body 1, specifically the connecting seam at the connection between the bottom shell 11 and the upper shell 12, which cannot be completely sealed due to assembly or structural requirements. In conventional designs, an elastic sealing gasket is added to the gap, but 100% sealing cannot be achieved.

[0021] The overall structure of the window cleaning machine is shown in the attached figure. Figure 1 As shown, in the appendix Figure 2-4 In the design, the main body 1 of the window cleaning machine is composed of a bottom shell 11 and an upper shell 12 connected together. The first gap is located at the connection between the bottom shell 11 and the upper shell 12, surrounding the entire main body 1. (Attached) Figure 5 The accommodating space is spatially mapped and divided based on the bottom shell 11. (Attached) Figure 5 The location of the first gap is shown in region A3, which is the outer edge of region A22 and corresponds to the edge of the bottom shell 11. The location of the second gap is shown in region A4, which corresponds to the location of the pivot. Since the first gap is located at the joint between the bottom shell 11 and the upper shell 12, it is more easily exposed to dust and moisture when the window cleaning machine is working. Under negative pressure, the first gap can easily draw dust, moisture, and other dirt from the outside into the main body.

[0022] Specifically, when the negative pressure device evacuates the first space, a high negative pressure environment is created. The second space is connected to the first space through a second gap. Due to the presence of the second gap, the negative pressure in the first space is passively conducted to the second space, causing air in the second space to be drawn into the first space, thus creating a low negative pressure state. After the second space forms a negative pressure, a pressure difference is created between it and the outside atmosphere. At this time, the first gap on the shell wall of the main body 1 becomes a weak point in the pressure balance. Driven by the pressure difference, external moisture and dust are drawn into the machine body through the first gap, causing the components in the second space to become damp and dusty, leading to malfunctions.

[0023] To address this issue, this application does not forcibly seal the first and second gaps. Instead, it solves the problem through air pressure balance. The air pressure transmitted through the intake channel 15 effectively balances the internal and external pressures, while simultaneously preventing the air pressure in the second space from becoming unsustainable due to excessive leakage from the first gap. The intake channel 15 connects to the second space, allowing outside air to actively enter and replenish the air drawn away by the second gap, maintaining a stable low negative pressure in the second space. Since the inside of the first gap is adjacent to the second space, the stable air pressure in the second space is transmitted to the inside of the first gap through the shell structure, causing the air pressure inside the first gap to tend towards equilibrium with the external atmospheric pressure. Water vapor and dust lose the pressure driving force to be drawn in, preventing active adsorption and intrusion even if there are tiny gaps in the first gap, thus fundamentally solving the problem of impurity infiltration. By relieving pressure on the first gap through the intake channel 15, the disadvantage of not being able to completely seal is transformed into a favorable condition where the negative pressure in the first space drives airflow circulation and heat dissipation in the second space.

[0024] The main body 1 is the load-bearing and functional core of the window cleaning machine, consisting of a bottom shell 11 and an upper shell 12 that can be detachably or fixedly connected. The enclosed space formed by the two is the key carrier for realizing functions such as adsorption and airflow circulation. The enclosed space is clearly divided into a first space and a second space, and the second space at least partially surrounds the first space, allowing the second space to surround the adsorption core.

[0025] In the appendix Figure 2 In the middle, the upper shell 12 and the bottom shell 11 form a receiving space. The space corresponding to region A1 is the first space, and the space corresponding to region A2 is the second space. The space corresponding to region A1 is a closed space formed by a specific channel upper cavity 13 and a channel lower cavity 14 integrated on the bottom shell 11. The structures of the channel upper cavity 13 and the channel lower cavity 14 are shown in the attached figure. Figure 2 As shown, the upper cavity 13 and lower cavity 14 of the channel form the first space and also serve as the dividing wall between the first and second spaces. The positions of the first and second spaces on the same plane are mapped as shown in the attached figure. Figure 5 As shown in the figure. Among them, the space corresponding to region A1 is the first space, and the space combining regions A21 and A22 is the second space.

[0026] The first space is the key area for the window cleaning machine to achieve adsorption and fixation. Its core function is to create a negative pressure environment lower than the outside atmospheric pressure by using the negative pressure device 3 on the main body 1 of the window cleaning machine to create a vacuum. This pressure difference then firmly adheres the window cleaning machine to the surface to be cleaned, providing a stable foundation for the operation of the cleaning unit and the movement of the window cleaning machine. The second space, as the internal functional cavity of the main body 1, houses many components of the main unit, such as the drive unit 4 and the transmission unit 5. The second space is divided into multiple sub-regions by mounting posts and ribs on the bottom shell 11, but all sub-regions are interconnected, allowing free airflow. These mounting posts and ribs are structures used to fix components such as the drive motor, transmission gears, and circuit boards. (See attached...) Figure 2-3 In the design, the enclosing wall of the first space also serves as the internal boundary of the second space. The shared boundary design maximizes the use of the internal space of the machine, making the window cleaning machine more compact.

[0027] In some specific embodiments, a negative pressure device 3 is also included, which is installed on the main body 1; an adsorption space is formed inside the walking device 2, and the adsorption space is connected to the first space; the negative pressure device 3 evacuates the adsorption space through the first space, so that the window cleaning machine adsorbs onto the surface to be cleaned. The negative pressure device 3, as the adsorption power source, is fixedly installed on the main body 1 and uses equipment such as a miniature vacuum pump and a negative pressure fan, which has sufficient vacuuming capacity. The adsorption space is a closed adsorption space formed by the walking device 2 and the surface to be cleaned when they are in contact; the adsorption space is connected to the first space through an internal air passage, ensuring that the connection path is sealed and does not affect the power transmission. An example of the position of the negative pressure device 3 is attached. Figure 3and 4 As shown.

[0028] After the window cleaning machine is attached to the surface to be cleaned, the negative pressure device 3 is activated, and a vacuum is drawn into the first space through the air extraction port, so that a stable high negative pressure environment is quickly formed in the first space. Since the first space is sealed and connected to the adsorption space of the walking device 2, the negative pressure will be synchronously transmitted to the adsorption space through the air passage, so that the air pressure in the adsorption space will also drop to a low negative pressure state close to that of the first space.

[0029] However, due to limitations in the mechanical structure, the seal between the second space and the first space cannot be strictly controlled, resulting in a second gap between the two spaces. When the first space is evacuated, the air pressure inside the first space is lower than that inside the second space. This pressure difference drives air from the second space into the first space through the second gap. To replenish the air in the second space and prevent excessive negative pressure, this application designs an air intake channel 15. Outside air enters the second space through the air intake channel 15 on the bottom shell 11. The airflow entering the second space flows through all component areas, carrying away the heat generated by the drive motor and transmission gears during operation, and finally flows into the first space through the second gap, completing the cycle of intake → heat dissipation → exhaust. The second space, as the internal functional cavity of the main body 1, is not only the mounting carrier for components but also the core channel for airflow circulation. The passively formed negative pressure provides a power basis for airflow and, through air exchange with the first space, achieves air pressure balance and functional expansion.

[0030] The core functions of the air intake channel 15 are twofold: first, "pressure relief." Since the second space passively forms a negative pressure, prolonged closure can lead to excessive negative pressure, potentially affecting the normal operation of internal components. The air intake channel 15, by connecting to the outside, allows outside air to actively flow into the second space, balancing the negative pressure and preventing structural or functional risks caused by excessive negative pressure. Second, "air supply." It provides the source for airflow circulation in the second space. After entering the second space through the air intake channel 15, outside air can carry heat or supplement airflow, ensuring subsequent airflow and functional operation. The exhaust channel 16 serves as an auxiliary path for airflow discharge from the second space. Its function is to discharge the airflow from the second space to the outside, complementing the main airflow path from the second gap to the first space, preventing airflow stagnation in the second space and ensuring smooth airflow circulation. The air intake channel 15 is located on the bottom shell 11, preventing direct exposure; it is hidden between the bottom shell 11 and the surface to be cleaned, reducing the source of moisture and dust and lowering the probability of moisture and dust being drawn into the main body 1.

[0031] Faced with the mechanical structure of the second gap, this application does not forcibly seal the gap, but instead turns a disadvantage into an advantage. It utilizes this gap to allow the negative pressure in the first space to drive airflow circulation in the second space. This solves the core requirement of adsorption in the first space and also facilitates heat dissipation for the components in the second space. The adsorption function and the airflow circulation function are interdependent; the adsorption in the first space provides airflow power for the second space, and the airflow circulation in the second space can further generate functions such as heat dissipation and water prevention, improving the reliability and practicality of the equipment. Simultaneously, the design of the second space surrounding the first space allows the airflow to fully cover the internal components, while also facilitating the arrangement of the intake channel 15 and the exhaust channel 16, ensuring efficient airflow circulation.

[0032] In some specific embodiments, the window cleaning machine further includes a walking device 2, which is connected to the main body 1 via a rotating shaft 51. A second gap exists between the rotating shaft 51 and the bottom shell 11, allowing the rotating shaft 51 to rotate. The second gap connects the first space and the second space. The walking device 2 can be understood as the cleaning unit of the window cleaning machine. As a module that directly performs the cleaning task, its core function is to contact the surface to be cleaned, move under the control of the main body 1, and remove surface stains through wiping, scraping, etc., during the movement. The walking device 2 is a roller with a cleaning cloth. The surface of the roller is covered with cleaning material. When the rotating shaft 51 drives the roller to rotate, the roller serves as both a walking component and a cleaning component. Through the movement of the walking device 2, the window cleaning machine can autonomously cover all areas of the surface to be cleaned without manual hand-held movement, achieving automated cleaning. The movement path of the walking device 2 can be planned by the control module of the main body 1. The movement path includes patterns such as Z-shaped and straight lines, which can fully cover the glass surface, while the cleaning component continues to function during movement. The structure of the walking device 2 is shown in the attached figure. Figure 2-3 As shown.

[0033] The walking device 2 is fixed to the main body 1 via a rotating shaft 51. Specifically, one end of the rotating shaft 51 is connected to the roller / cleaning component of the walking device 2, and the other end passes through the mounting hole of the bottom shell 11, extends into the second space, and is connected to the transmission device 5 and the drive device 4 in the second space. The rotating shaft 51 needs to rotate around its own axis to drive the walking device 2 to move, so a rotation gap must be reserved between the rotating shaft 51 and the mounting hole of the bottom shell 11. This gap is the second gap between the first space and the second space, which is a structural requirement for the walking device 2 to rotate. The second gap is the physical basis for the rotation of the rotating shaft 51. Without this gap, the rotating shaft 51 would be stuck to the bottom shell 11, and the walking device 2 would not be able to move. At the same time, the second gap is the only connecting channel between the first space and the second space, supporting the airflow circulation process of the active negative pressure in the first space and the passive negative pressure in the second space. This application does not require the additional design of a connecting pipe between the two spaces, and utilizes the rotation requirement of the second gap of the walking device 2 to achieve the air circulation function.

[0034] In some specific embodiments, the second space includes a first part and a second part for accommodating components. The drive device 4 and transmission device 5 on the main body 1 are located within the first part, and the second part is located on the periphery of the first part. The transmission device 5 includes a rotating shaft 51 and is connected to the walking device 2 via the rotating shaft 51. The drive device 4 is at least partially exposed in the second part. The drive device 4 generates heat during operation and heats the airflow, causing the heated airflow to be discharged from the exhaust channel 16. (See attached...) Figure 5 In the diagram, the space corresponding to region A1 is the first space, the space corresponding to region A21 is the first part of the second space, and the space corresponding to region A22 is the second part of the second space. From the mapping diagram, region A21 and region 1 occupy the central area of ​​the containment space, and region A22 is located on the periphery of the central area.

[0035] The second space, serving as the internal functional cavity of the main body 1, is clearly divided into a first part and a second part, which are interconnected as a single structure. The first part, located inside the second space, is an independent installation area enclosed by mounting posts and positioning ribs on the bottom shell 11, with dimensions adapted to the overall volume of the drive device 4 and the transmission device 5. The second part is located around the first part, surrounding it, with its boundary consisting of the outer wall of the bottom shell 11, the outer wall of the first part, and the inner wall of the upper shell 12, forming an annular airflow channel. The second part communicates with the outside world through the air intake channel 15 and with the first space through the second gap of the bottom shell 11 via the rotating shaft 51.

[0036] The first part provides stable mounting support for the drive unit 4 and the transmission unit 5, preventing airflow from interfering with the precision transmission structure and reducing the impact of factors such as dust adhesion and low-frequency vibration on the core components. Furthermore, the second part, as a surrounding airflow path, allows outside air to flow through the heat dissipation surface of the drive unit 4 and then be quickly discharged, improving heat dissipation efficiency. Through the coordinated cooperation between the inner and outer parts, the dual requirements of component accommodation and airflow circulation are met within the limited overall volume of the machine, avoiding structural conflicts.

[0037] In addition to the rotating shaft 51, the transmission device 5 also includes gear sets, couplings, and other components, all integrated within the first part of the second space. The rotational power output by the drive device 4 is processed by the gear set to meet the load requirements of the window cleaning machine. The rotating shaft 51, as the core carrier of power transmission, not only undertakes the task of power transmission, but the second gap between it and the mounting hole of the bottom shell 11 also serves as a connecting channel between the second space and the first space, realizing the functional reuse of power transmission and airflow communication, reflecting the compactness of the design.

[0038] It should be noted that the drive unit 4 is fixedly installed within the first part of the second space, but it is not completely enclosed; rather, it adopts a "partially exposed" installation method. Preferably, the main heat dissipation surfaces, such as the motor's housing sidewalls and rear end cover, are exposed in the airflow channel of the second part, with only the motor's fixed end and wiring terminals connected to the positioning ribs of the first part via mounting brackets. The purpose of this design is to maximize the contact area between the drive unit 4 and the airflow, allowing heat to be quickly conducted into the airflow. (See attached...) Figure 4 and 5 In the middle, part of the drive unit 4 is located in region A21 and is connected to the rotating shaft 51 through the transmission device 5, and the other part is located in region A22.

[0039] When the negative pressure device 3 evacuates the first space, a low-pressure zone is formed within the first space, creating a pressure difference with the second space. Driven by this pressure difference, outside air actively enters the second part of the second space through the air intake channel 15 on the bottom shell 11, forming a continuous airflow. The airflow entering the second part flows along the annular channel and, when it passes the exposed heat dissipation surface of the drive device 4, it exchanges heat with the heat dissipation surface, absorbing the heat generated by the drive device 4 during operation. The heated airflow flows into the first space through the second gap between the rotating shaft 51 and the bottom shell 11, and is finally discharged from the entire machine by the negative pressure device 3 along with the negative pressure airflow in the first space. This achieves internal heat dissipation of the window cleaning machine without the need for an additional heat dissipation structure, simplifying the structure and reducing energy consumption.

[0040] To ensure a balance between heat dissipation and adsorption stability, in some specific embodiments, the size of the second gap between the rotating shaft 51 and the bottom shell 11 is smaller than the opening size of the first space, so that the negative pressure in the second space is lower than the negative pressure in the first space. When the window cleaning machine is working, the airflow in the second space flows into the first space to remove heat from the drive device 4 and reduce its temperature. By precisely controlling the size of the second gap between the rotating shaft 51 and the bottom shell 11 and the opening size of the first space, an air pressure gradient is created, thereby driving the airflow in the second space to flow directionally into the first space. This achieves passive and efficient heat dissipation of the drive device 4 without adding additional heat dissipation components, while ensuring the adsorption stability of the window cleaning machine. This ensures that the second space has sufficient airflow to remove heat while preventing the second gap from being too large, which could lead to the loss of negative pressure in the first space. (See attached...) Figure 7 There are three circles Q1, Q2 and Q3. The area of ​​Q1 is the area where the pivot is located. The second gap is located in the area of ​​Q1. The annular area enclosed by Q2 and Q3 is divided into multiple chambers by a rib structure. This annular area is the opening K of the first space.

[0041] The second gap size is the radial clearance between the outer circumferential surface of the rotating shaft 51 and the inner wall of the mounting hole of the bottom shell 11. To ensure smooth rotation of the rotating shaft 51, this size is usually designed to be 0.1-0.5mm, which is a micron-level gap. It only meets the minimum requirements for the rotation of the rotating shaft 51 and serves as the only communication channel between the second space and the first space. The opening size of the first space refers to the effective sealed opening area of ​​the first space facing the surface to be cleaned, that is, the area of ​​the sealed area formed after the enclosing wall of the first space is in contact with the surface to be cleaned. This size directly determines the negative pressure bearing capacity and the magnitude of the adsorption force of the first space.

[0042] When the negative pressure device 3 is activated, a vacuum is drawn into the first space. Since the first space is a sealed, large-volume cavity with a sufficiently large opening, a stable high negative pressure environment can be quickly established. The second space is connected to the first space through a second gap and to the outside atmosphere through an air intake channel 15. Due to the extremely small effective flow surface of the second gap at the rotating shaft 51, the negative pressure in the first space cannot be quickly transferred to the second space. Outside air continuously enters the second space through the air intake channel 15, maintaining the air pressure in the second space at a low negative pressure state. This ultimately creates a stable pressure gradient where the high negative pressure in the first space is greater than the low negative pressure in the second space. (Gas fluid is as follows...) Figure 8 As shown.

[0043] The pressure gradient is the power source for the directional flow of air. Under the action of the pressure gradient, fresh air from the outside actively enters the second space through the air intake channel 15 on the bottom shell 11. The airflow diffuses along the cavity structure of the second space and flows naturally over the surface of the drive device 4. Driven by the pressure difference, the air in the second space will continuously flow through the second gap to the first space, forming a stable unidirectional airflow, which provides power for the heat dissipation of the drive device 4 without additional energy consumption.

[0044] If the second gap is too large, the high negative pressure in the first space will leak rapidly into the second space, making it impossible to maintain the air pressure in the first space. This will cause the suction force to drop sharply, and the window cleaning machine will easily fall off the surface to be cleaned. If the second gap is too small, the airflow will be insufficient, failing to effectively remove the heat generated by the drive unit 4, resulting in poor heat dissipation.

[0045] In some specific embodiments, the window cleaning machine also includes a water-blocking strip 6, which is disposed around the air intake channel 15 to restrict external water from entering the air intake channel 15. When the window cleaning machine is working, water generated during the cleaning process will flow downwards along the glass surface or accumulate at the bottom of the equipment. When the water contacts the outer surface of the base 11, the water-blocking strip 6 acts as the first barrier, its raised structure directly preventing the water from flowing towards the air intake channel 15. The position and structure of the water-blocking strip 6 are shown in the attached figure. Figure 9 As shown.

[0046] The water-retaining strip 6 is made of elastic, water-resistant silicone or rubber. In practical applications, the water-retaining strip 6 can be fixed to the bottom shell 11 by integral molding, bonding, or snap-fit, and coaxially surrounds the outer perimeter of the air intake channel 15. If the bottom shell 11 has multiple air intake channels 15, the water-retaining strip 6 can be designed as an overall annular structure surrounding all air intake channels 15, or an independent annular structure corresponding to a single air intake channel 15, with its inner diameter slightly larger than the distribution range of the air intake channels 15, ensuring complete coverage of the opening area of ​​the air intake channel 15, forming the first physical barrier. In the attached diagram, the water-retaining strip 6 extends from the drainage channel into the interior of the main body 1.

[0047] In some specific embodiments, the window cleaning machine also includes a guide groove 7, located around the water-retaining strip 6, for collecting accumulated water from the outside. The guide groove 7 is an annular groove formed on the outer surface of the bottom shell 11 around the water-retaining strip 6, located around the water-retaining strip 6, and its groove contour matches the shape of the water-retaining strip 6. The position and structure of the guide groove 7 are shown in the attached figure. Figure 9 As shown.

[0048] In the appendix Figure 9 In this system, the guide channel 7 is a downward-opening, groove-shaped structure. The contour of the channel perfectly matches the annular shape of the water-retaining strip 6, encircling the cleaning tray to form a closed annular water channel. Because the opening faces downwards (towards the surface to be cleaned), accumulated water will naturally converge into the channel under gravity (rather than leaking into the equipment). Simultaneously, the channel has a lowest point (usually designed at the rear or bottom of the window cleaning machine's movement direction), providing a directional outlet for water drainage. During cleaning, water accumulated outside the water-retaining strip 6 will spread outwards along the surface of the bottom shell 11, but is caught by the annular guide channel 7. Since the guide channel 7 encircles the cleaning tray, regardless of which direction the water overflows from the water-retaining strip 6, it will enter the channel, achieving comprehensive collection without any blind spots.

[0049] Preferably, the inner wall of the guide groove 7 is tightly connected to the outer wall of the water baffle 6 to ensure that the water overflowing from the water baffle 6 can quickly flow into the groove and prevent water from accumulating between the water baffle 6 and the guide groove 7.

[0050] In some specific embodiments, the sidewall of the guide channel 7 away from the water-retaining strip 6 slopes outward to facilitate the drainage of accumulated water within the guide channel 7 to the outside. Under the influence of gravity, the water flowing into the guide channel 7 will flow towards the outside of the equipment along the slope of the outer sidewall. The outer sidewall of the guide channel 7 (the sidewall away from the water-retaining strip 6) is designed to slope outward, and the top of the outer sidewall smoothly transitions to the outer surface of the bottom shell 11, while the bottom of the outer sidewall extends to the edge of the bottom shell 11 or the drainage area of ​​the equipment. (See attached...) Figure 10 In the middle, the inclined surface corresponding to region E is the outwardly inclined sidewall of the guide groove 7.

[0051] The guide groove 7 is an annular groove surrounding the cleaning tray. Its sidewall away from the water-retaining strip 6 is not perpendicular to the surface of the bottom shell 11, but rather slopes towards the surface to be cleaned, forming an outward-opening slope. In the attached diagram, the cross-section of the guide groove 7 is trapezoidal, with the hypotenuse being the sidewall of the guide groove 7 away from the water-retaining strip 6. The water-retaining strip 6 is responsible for blocking accumulated water, the guide groove 7 for collecting accumulated water, and the sloped sidewall for quickly draining accumulated water.

[0052] In some specific embodiments, a liquid storage cavity 8 is formed inside the bottom shell 11 corresponding to the air intake channel 15, so that water entering the air intake channel 15 is stored in the liquid storage cavity 8. The liquid storage cavity 8 is a recessed cavity inside the bottom shell 11 corresponding to the air intake channel 15, coaxially distributed with the air intake channel 15, and located above the air intake channel 15. The shape of the liquid storage cavity 8 needs to match the water-blocking strip 6. The liquid storage cavity 8 is located between the air intake channel 15 and the second space, forming a physical isolation zone. Even if water breaks through the external water-blocking strip 6, it will be intercepted by the liquid storage cavity 8. Figure 9 and 10 In the middle, one side of the liquid storage chamber 8 is a water-retaining strip 6, and the other three sides are structures on the bottom shell 11. (Attached) Figure 10 In the middle, the enclosed area above the air intake channel 15 is the liquid storage chamber 8.

[0053] The liquid storage chamber 8 is essentially a trough with its opening facing downwards towards the surface to be cleaned. This is equivalent to setting up a water trap upstream of the air intake channel 15, preventing the incoming water from continuing to flow into the second space and confining it within the chamber.

[0054] The water-blocking strip 6 can block most of the accumulated water. By adding a liquid storage chamber 8 inside the bottom shell 11, a dual protection system of external blocking and internal collection is constructed. For the very few accumulated waters that break through the external protection, a secondary interception is carried out to block the path of accumulated water into the second space and maximize the protection of the core components.

[0055] In some specific embodiments, the water-retaining strip 6 is inclined towards the liquid storage chamber 8 along the inner wall of the air intake channel 15. A small amount of water that comes into contact with the inner wall of the water-retaining strip 6 flows downwards along the inclined inner wall under the influence of gravity. The inclined surface formed by the inner wall is located directly above the air intake channel 15, so the water passing through the air intake channel 15 will directly impact the inclined inner wall of the water-retaining strip 6. The inner wall of the water-retaining strip 6 effectively provides a horizontal blocking structure that directly blocks the air intake channel 15. Due to the inclined structure of the inner wall, the water will flow downwards along the inclined surface after impact and flow out of the air intake channel 15, providing a better blocking effect. A small amount of water that comes into contact with the inner side of the water-retaining strip 6 will flow out of the air intake channel 15 along this slope. The inner wall of the water-retaining strip 6 is shown in the attached figure. Figure 10 The inclined plane F is shown in the figure.

[0056] Specifically, the inner wall is inclined towards the liquid storage chamber 8, forming an angle of 10°-35° with the annular central axis of the water baffle 6, forming an "annular inclined surface" around the air intake channel 15, which blocks the water from spreading to the center of the air intake channel 15 from the horizontal dimension. In this application, all water-proof structures are integrated with the bottom shell 11, eliminating the need for additional complex components, reducing the number of parts and assembly processes, and lowering manufacturing costs. The materials used are water-resistant, wear-resistant, and corrosion-resistant silicone and engineering plastics, which are not prone to aging and failure after long-term use, resulting in low maintenance costs. The integrated design also avoids the sealing risks of spliced ​​structures, improving the overall structural reliability.

[0057] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, apparatus, article, or method that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, apparatus, article, or method. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, apparatus, article, or method that includes that element.

[0058] The above description is only a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural changes made based on the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A window cleaning machine, characterized in that, The window cleaning machine comprises: a main body, a containing space is formed in the main body, a first gap is formed on the shell wall of the main body, the containing space comprises a first space and a second space, the first space is used for vacuumizing so that the window cleaning machine is adsorbed on the surface to be cleaned, the second space is at least partially located at the periphery of the first space, and the second space is used for containing components and elements; a second gap exists between the first space and the second space, when the first space is vacuumized, the second space is passively vacuumized to form a negative pressure state through the second gap; an air inlet channel and an air outlet channel are provided on the main body and are in communication with the second space; the air inlet channel is used for releasing the pressure of the second space and the first gap, and the air outlet channel is used for discharging the airflow in the second space.

2. The window cleaning machine of claim 1, wherein, The main body comprises a bottom shell and an upper shell connected with the bottom shell, the bottom shell and the upper shell are connected and form the containing space, the first gap comprises a connecting gap formed at the connecting position of the bottom shell and the upper shell, and when the air inlet channel releases the pressure of the second space, the air inlet channel releases the pressure of the connecting gap.

3. The window cleaning machine of claim 2, wherein, The window cleaning machine further comprises a walking device, the walking device is connected to the main body through a rotating shaft, the second gap exists between the rotating shaft and the bottom shell to enable the rotating shaft to rotate, and when the first space is vacuumized, the second space is passively vacuumized to form a negative pressure state.

4. The window cleaning machine of claim 3, wherein, The second space comprises a first part and a second part for containing components and elements, a driving device and a transmission device on the main body are located in the first part, and the second part is located at the periphery of the first part; The transmission device comprises a rotating shaft and is connected to the walking device through the rotating shaft; the driving device is at least partially exposed in the second part, the driving device generates heat when working, and the heated airflow is discharged from the air outlet channel.

5. The window cleaning machine of claim 4, wherein, The size of the second gap between the rotating shaft and the bottom shell is smaller than the size of the opening of the first space, so that the negative pressure in the second space is smaller than the negative pressure in the first space; When the window cleaning machine works, the airflow in the second space flows into the first space to drive the heat on the driving device and reduce the temperature of the driving device.

6. The window cleaning robot according to claim 1, wherein The window cleaning machine further comprises a water baffle, the water baffle is arranged at the periphery of the air inlet channel to limit the external accumulated water from entering the air inlet channel.

7. The window cleaning machine of claim 6, wherein, The window cleaning machine further comprises a guide groove, the guide groove is located at the periphery of the water baffle and is used for collecting the external accumulated water.

8. The window cleaning machine of claim 7, wherein, The side wall of the guide groove away from the water baffle is inclined outward to facilitate the discharge of the accumulated water in the guide groove to the outside.

9. The window cleaning machine of claim 6, wherein, A liquid storage cavity is formed in the interior of the main body corresponding to the air inlet channel, so that the accumulated water entering the air inlet channel is stored in the liquid storage cavity.

10. The window cleaning machine of claim 9, wherein, The inner wall of the water baffle towards the air inlet channel is inclined to the liquid storage cavity.

11. The window cleaning robot according to claim 3, wherein A negative pressure device is further arranged on the main body. The walking device is provided with an adsorption space, which is communicated with the first space; the negative pressure device draws vacuum in the adsorption space through the first space, so that the window cleaning machine is adsorbed on the surface to be cleaned.

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