A surface cleaning apparatus

Abstract

The application discloses a surface cleaning device, which comprises a floor brush and a cleaning element rotatably installed on the floor brush. The floor brush comprises a floor brush shell, a dirt scraping element, a liquid distribution element and a heating element. The dirt scraping element is in abutment with the cleaning element to scrape the cleaning element. The liquid distribution element is used for supplying cleaning liquid to the cleaning element. In the rotation direction of the cleaning element, the dirt scraping element is located on the upstream side of the liquid distribution element, the heating element is located on the downstream side of the liquid distribution element, and a wetting gap is arranged between the liquid distribution element and the heating element. The heating element is arranged in a floating manner relative to the floor brush shell, so that the outer surface of the heating element is in contact with the cleaning element, and the cleaning element and the cleaning liquid on the cleaning element are heated. The heating element is arranged behind the liquid distribution element in the rotation direction of the cleaning element, so that the cleaning element can be heated in the case of being full of cleaning liquid. The heat conduction medium on the cleaning element is increased. The cleaning liquid acts as the heat conduction medium, a heat conduction channel is formed between the heating element and the cleaning element, the heat transmission efficiency is greatly improved, and the heating effect of the cleaning element in a short time is improved.

Description

Technical Field

[0001] This application belongs to the field of cleaning appliance technology, and specifically relates to a surface cleaning device. Background Technology

[0002] For surface cleaning devices such as floor scrubbers, vacuum cleaners, and sweepers, cleaning is achieved by the rotating cleaning components contacting the surface to be cleaned during operation. In existing technologies, some surface cleaning devices employ a combined washing and mopping function, using cleaning fluid sprayed onto the cleaning components to enhance cleaning performance. To further enhance the effect, some solutions propose heating the cleaning fluid, using hot cleaning fluid to dissolve stains, which are then removed by the rotating cleaning components.

[0003] A typical structural layout of existing surface cleaning devices is as follows: a squeegee, a fixed heating element, and a liquid distribution element are arranged sequentially along the rotation direction of the cleaning component. The workflow is as follows: wastewater carried by the cleaning component is scraped off by the squeegee; the cleaning component with low water content is heated by the fixed heating element; the liquid distribution element sprays room-temperature cleaning liquid onto the heated cleaning component, and the temperature of the room-temperature cleaning liquid increases upon contact with the high-temperature cleaning component, thus raising the temperature of the cleaning liquid.

[0004] However, this method of heating the cleaning fluid has certain limitations: when the distributor sprays room-temperature cleaning fluid onto the heated cleaning parts, the cleaning parts quickly lose temperature after a brief contact with the cleaning fluid, resulting in limited temperature rise of the cleaning fluid; moreover, as the surface cleaning device is used continuously, the cleaning parts become thinner due to wear, leading to a larger gap between the heating element and the cleaning part. The existence of this gap causes a considerable portion of the heat generated by the heating element to be lost through air conduction and convection, resulting in limited heat absorption by the cleaning part and heat waste, which affects the heating effect of the cleaning fluid.

[0005] To address this technical problem, existing technologies propose making the heating element floating, ensuring close contact between the heating element and the cleaning element to enhance the heating effect and thus improve the heat conduction of the cleaning element to the cleaning fluid after heating. However, this approach has new drawbacks: the cleaning element has a low moisture content after being wiped by the squeegee. The close contact between the floating heating element and the cleaning element allows heat to be directly transferred to the relatively dry brush fibers. Due to the lack of moisture as a buffer, the local temperature on the outer surface of the cleaning element may exceed the tolerance limit of the brush or bristle material, leading to scorching, hardening, or even breakage of the brush or bristles, significantly impacting the lifespan of the cleaning element. Furthermore, the reduced friction when the scorched and hardened cleaning element contacts the ground worsens the stain removal effect, affecting the cleaning efficiency of the cleaning equipment. Additionally, the cleaning fluid sprayed by the distributor cannot be heated due to its downstream layout. When the low-temperature cleaning fluid comes into contact with the high-temperature brush, steam is generated. This steam carries heat and dissipates to other components of the surface cleaning device, affecting their normal operation and further impacting the lifespan and cleaning effectiveness of the surface cleaning device.

[0006] Furthermore, for assembly or design considerations, existing heating elements are typically located on the side of the cleaning element. Patent application number 202210906878.6 discloses a roller brush cleaning mechanism and device, in which the scraper is located at the top of the cleaning element, and the heating element is located on the side of the cleaning element diagonally above and adjacent to the scraper. The end of the heating element away from the scraper extends to the front side of the cleaning element. This structure has the following problems: because the cleaning fluid on the outer surface of the cleaning element slides along its own gravity, the cleaning fluid located on the side, diagonally above, or diagonally below the cleaning element will slide along the outer surface, resulting in uneven distribution of the cleaning fluid. When the heating element heats, it heats not only the bristles on the outer surface of the cleaning element but, more importantly, the cleaning fluid. Due to the uneven distribution of the cleaning fluid on the side of the cleaning element, the heating is uneven across the outer surface, affecting the heating effect of the heating element. Meanwhile, after the cleaning fluid is sprayed onto the cleaning components, it may be flung out due to the centrifugal force of the rotating components. The flung-out cleaning fluid may enter the housing through the gap between the heating element and the floor brush housing, affecting the stable operation of the floor brush.

[0007] In summary, although existing technologies improve the heating effect on the cleaning components by changing the heating element to a floating one, the structural layout of the surface cleaning device limits its advantages over fixed heating elements, resulting in more new drawbacks that affect the lifespan and cleaning effectiveness of the surface cleaning device. Utility Model Content

[0008] This application provides a surface cleaning device to solve the technical problems of poor heating effect of cleaning liquid, short service life of cleaning parts due to the influence of heating elements, and uneven heating of cleaning parts caused by unreasonable structural layout in traditional surface cleaning devices.

[0009] The technical solution adopted in this application is as follows:

[0010] A surface cleaning device includes a floor brush and a cleaning component rotatably mounted on the floor brush. The floor brush includes a brush housing, a scraping component, a dispensing component, and a heating component. The scraping component abuts against the cleaning component to scrape the cleaning component. The dispensing component supplies cleaning liquid to the cleaning component. Along the rotation direction of the cleaning component, the scraping component is located upstream of the dispensing component, and the heating component is located downstream of the dispensing component. An immersion gap is provided between the dispensing component and the heating component. The heating component is floating relative to the floor brush housing so that its outer surface is in contact with the cleaning component to heat the cleaning component and the cleaning liquid on it.

[0011] In this application, the scraping component, the liquid dispensing component, and the heating component are arranged sequentially from upstream to downstream along the rotation direction of the cleaning component. This allows the cleaning component to first be scraped and drained of dirt by the scraping component, then sprayed by the liquid dispensing component, and finally heated by the heating component. The heating component is positioned later than the liquid dispensing component along the rotation direction of the cleaning component, enabling the cleaning component to be heated while still being filled with cleaning liquid. On one hand, the presence of cleaning liquid increases the heat transfer medium on the cleaning component. As a heat transfer medium, the cleaning liquid forms a heat transfer channel between the heating component and the cleaning component, significantly improving the heat transfer efficiency and thus enhancing the heating effect of the cleaning component in a short time. On the other hand, during the rotation of the cleaning component, the cleaning liquid is subjected to centrifugal force, causing more cleaning liquid to move towards the surface of the cleaning component and contact the heating component. The heating component can enhance the heating effect on the cleaning component by heating the cleaning liquid and utilizing the penetration of the cleaning liquid into the cleaning component, thereby improving the hot water floor cleaning function of the surface cleaning device in this application. Furthermore, when uneven heat distribution from the heating element to the cleaning component leads to excessively high local temperatures on the outer surface, the cleaning fluid evaporates due to the high heat. During evaporation, it absorbs heat from the surrounding environment, lowering the temperature of the bristles or brush cloth on the outer surface of the cleaning component, thus eliminating the risk of dry burning. The heated cleaning fluid gradually penetrates to the roots of the bristles, causing the overall temperature of the bristles to rise evenly. During subsequent rotation, it continuously transfers heat to the surface to be cleaned, improving the cleaning effect.

[0012] Furthermore, since the cleaning component rotates continuously, it reaches a high temperature after being heated by the heating element and then wipes the surface to be cleaned. After wiping, some of the heat from the cleaning component is transferred to the surface to be cleaned, and the temperature of the cleaning component itself is reduced to a certain extent, reaching a "warm" state. The cleaning component continues to rotate in this warm state, and the cleaning fluid sprayed onto it by the dispensing element is preheated by the warm cleaning component, slowly increasing its temperature. When it enters the main heating area in contact with the heating element, the small temperature difference between the cleaning fluid and the heating element prevents uneven heating of the liquid caused by rapid temperature rise, thus avoiding localized overheating due to a large temperature gradient. Simultaneously, compared to traditional technologies where the cleaning fluid directly contacts the "high-temperature" cleaning component heated by the heating element, the smaller temperature difference between the cleaning fluid and the cleaning component in this application prevents rapid temperature loss of the cleaning component, thereby avoiding fiber damage to the outer surface tufts caused by large temperature fluctuations and helping to extend the service life of the cleaning component.

[0013] Based on the above solution, as the cleaning component's outer surface brush or bristles wear down and thin with continuous use, the heating element is relatively floating relative to the brush housing. This allows the heating element to maintain a relatively stable contact force with the cleaning component, thereby ensuring the heating effect on the cleaning component and guaranteeing the heating effect throughout the entire life cycle of the surface cleaning device. Consequently, it ensures the stability of the cleaning effect on the surface to be cleaned. Furthermore, due to the presence of the immersion gap in this application, the cleaning component is fully immersed in the cleaning liquid before being heated by the heating element. The cleaning liquid shares the heat conducted by the heating element, so even if the heating element is always in close contact with the cleaning component, the cleaning component will not be damaged by dry burning due to the high heat of the heating element.

[0014] Finally, because the dispensing component is arranged independently of the heating component and there is no direct heat conduction path between them, the cleaning fluid flowing inside the dispensing component is always at room temperature, fundamentally preventing scale buildup in the dispensing holes or pipes and extending the service life of the dispensing component. At the same time, it reduces the maintenance cost of the dispensing component, eliminating the need to regularly use acidic cleaning agents to remove scale from the dispensing component, avoiding the risk of acidic liquid corrosion, and reducing the complexity of user maintenance. Furthermore, the dispensing component can be made of ordinary engineering plastics, without the need for high-temperature resistant or corrosion-resistant materials, which helps to reduce the overall cost of the machine.

[0015] The surface cleaning device described in this application also includes the following additional technical features:

[0016] The floor brush housing includes an upper housing and a lower housing. The upper housing includes a main body and an extension. The main body and the lower housing cooperate to form a receiving cavity. The extension extends forward from the opening of the receiving cavity to cover the cleaning component. The heating component is floatingly disposed on the extension.

[0017] The floor brush housing is designed to include an upper housing and a lower housing. The main body of the upper housing mates with the lower housing to form a receiving cavity. The internal space of the receiving cavity can be used to install various components of the surface cleaning device, such as the water tank and motor, thus optimizing the structural layout of the surface cleaning device. Furthermore, the extension provides a stable and maintainable mounting base for the heating element, and the extension can be manufactured integrally with the main body, reducing the assembly pressure of the floor brush housing and improving the manufacturing efficiency of the surface cleaning device. Moreover, since the extension extends outward from the main body, it forms a heating element mounting area independent of the receiving cavity, isolating the heating element from the components inside the receiving cavity. This reduces the impact of the heating element on core components such as the water tank and motor within the receiving cavity, ensuring the operational stability of the surface cleaning device. Simultaneously, the cantilever design of the extension ensures that the heating element follows the rotation trajectory of the cleaning element, preventing interference from other components.

[0018] This invention covers the cleaning component with an extension portion, ensuring that the heating element, also located on the extension portion, is positioned above the cleaning component. The cleaning liquid sprayed from the dispensing component, after landing on the outer surface of the cleaning component, moves tangentially along the outer surface under the influence of gravity and centrifugal force, thus following the cleaning component to below the heating element. Since the heating element is floatingly positioned on the extension portion and adheres to the bristles of the cleaning component, the centrifugal force of the cleaning liquid moving along the wetting gap to the heating element is suppressed by the heating element. It is not thrown out tangentially along the cleaning component, but rather evenly distributed within the bristles of the cleaning component due to the obstruction of the heating element and the influence of gravity. The liquid then moves with the cleaning component and its bristles to below the heating element and is heated. Simultaneously, the... The tips of the bristles below the heating element are also heated. Heat can be transferred to the roots of the bristles through the tips and the moisture in the gaps between the bristles. The continuous rotation of the cleaning element heats the entire cleaning element. Therefore, this technical solution makes the cleaning liquid distribution more uniform, which helps to achieve uniform heating of the cleaning liquid by the heating element and reduces the probability of uneven heating caused by uneven distribution of the cleaning liquid. Since the cleaning liquid in the gaps between the bristles is more uniform, the heating of the cleaning element is also more uniform. This not only avoids the problem of localized dry bristles and dry burning, but also allows the cleaning element to absorb heat from the heating element through multiple channels, further improving the heating efficiency. This not only improves the cleaning effect, but also makes it more efficient and energy-saving.

[0019] The heating element is mounted on the extension via a positioning bracket, which extends toward the accommodating cavity.

[0020] The floor brush housing includes an upper housing and a lower housing, the surface cleaning device includes a top cover that is detachably installed on the upper housing, and the heating element is floatingly installed on the top cover.

[0021] The top cover conceals the cleaning components, preventing spills of liquid from the components. Its detachable design allows for easy cleaning of any wastewater on the top cover. The heating element is floatingly mounted on the top cover. This provides a stable mounting position, ensuring a secure fit against the cleaning surface and consistent heating of the cleaning solution. Furthermore, the detachable design allows users to easily remove the heating element from the brush housing without tools, enabling direct cleaning or replacement of the heating element. This avoids the problems of stain accumulation and scale buildup that can occur with non-removable heating elements.

[0022] The central angle of the immersion gap along the circumference of the cleaning component to the coverage area of ​​the cleaning component is α, and α satisfies: 5°≤α≤40°.

[0023] The liquid dispensing component includes a liquid dispensing body and an extension portion connected to the liquid dispensing body and extending circumferentially along the cleaning component. Along the rotation direction of the cleaning component, the extension portion is located downstream of the liquid dispensing body. The liquid dispensing body is provided with a liquid outlet hole, and the extension portion and the outer surface of the cleaning component cooperate to form a liquid storage gap.

[0024] The liquid outlet of the dispensing body sprays cleaning fluid onto the cleaning component, while the extension extends circumferentially along the cleaning component to the upstream area of ​​the heating component. The liquid storage gap formed between the extension and the surface of the cleaning component temporarily stores some of the cleaning fluid, prolonging the residence time of the liquid on the brush cloth. This ensures that the cleaning fluid fully wets the brush cloth or bristle fibers on the outer surface of the cleaning component before entering the heating area. Modern surface cleaning devices typically have multiple cleaning modes. For heavily soiled surfaces, the device increases the amount of cleaning fluid sprayed from the dispensing body to enhance cleaning power. However, due to the large volume of the cleaning fluid, it may be difficult to quickly dissolve into the outer surface of the cleaning component. The liquid storage gap provides temporary storage space for cleaning fluid that fails to dissolve into the outer surface of the cleaning component immediately, preventing the cleaning fluid from being squeezed out due to insufficient storage space. Furthermore, the extension extends circumferentially along the cleaning component, conforming to its rotation direction, guiding the cleaning fluid to spread evenly along the outer surface of the cleaning component, improving the uniformity of the cleaning fluid coverage. Furthermore, the liquid storage gap creates a slight negative pressure effect when the cleaning component rotates, drawing some of the cleaning liquid into the gap and further increasing the saturation depth of the brush cloth. When the brush cloth carrying sufficient cleaning liquid enters the heating zone, the floating heating element significantly improves its heating efficiency. The liquid absorbs heat and evaporates rapidly, transferring the heat energy to the base of the brush cloth, resulting in a more uniform temperature distribution throughout the cleaning component.

[0025] The extension has a mounting cavity with the opening facing downwards. The heating element includes a heating element and an elastic element. The heating element is disposed in the mounting cavity. The elastic element is located between the heating element and the top wall of the mounting cavity and drives the heating element to float along the mounting cavity. The outer surface of the heating element is at least flush with the opening of the cavity so as to fit with the cleaning element.

[0026] The extension protrudes outward in a direction away from the cleaning component and forms the mounting cavity on the inside. The length of the extension is less than the length of the main body. The extension has reinforcing arms on both sides of the mounting cavity, and the reinforcing arms extend toward the main body to the receiving cavity.

[0027] The main body is provided with a bent flange between the accommodating cavity and the mounting cavity. The bent flange and the outer wall of the accommodating cavity cooperate to form a mounting groove for mounting the liquid dispensing component. One end of the extension is connected to the bent flange, and the other end extends upward to the top of the cleaning component. The mounting cavity is located on the side of the bent flange away from the accommodating cavity. The reinforcing arm passes through the bent flange and extends into the accommodating cavity.

[0028] The floor brush housing is also provided with a wiring cavity that communicates with the mounting cavity. The wiring cavity is used to introduce the power cord of the heating element into the receiving cavity.

[0029] The cabling cavity extends from the top of the mounting cavity into the housing cavity, forming a dedicated cable channel independent of other functional areas, avoiding interference between power cables and cleaning fluid lines or mechanical transmission components. After the power cable exits from the heating element, it passes through the cabling cavity directly into the controller interface inside the housing cavity, effectively reducing the wiring path and minimizing the impact of external high-temperature environments on the accuracy of line transmission.

[0030] The extension has a mounting groove. The heating element includes a heating element, an elastic element, and a pressure cap that is fastened to the upper port of the mounting groove. The heating element is disposed in the mounting groove. The elastic element is installed on the pressure cap and abuts against the heating element so that the heating element floats along the mounting groove. The outer surface of the heating element is at least flush with the lower opening of the mounting groove so as to at least partially fit the cleaning element.

[0031] The upper end of the mounting slot is sealed by a pressure cap, forming a removable heating element housing space. This allows the heating element and the elastic element to be pre-assembled as independent modules and then installed into the mounting slot as a whole, greatly simplifying the assembly process. The elastic element is installed between the pressure cap and the heating element, and its preset preload precisely controls the contact pressure of the heating element on the cleaning part, ensuring that the heating element maintains a stable fit with the cleaning part.

[0032] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0033] In this application, the scraping component, the liquid dispensing component, and the heating component are arranged sequentially from upstream to downstream along the rotation direction of the cleaning component. This allows the cleaning component to first be scraped and drained of dirt by the scraping component, then sprayed by the liquid dispensing component, and finally heated by the heating component. The heating component is positioned later than the liquid dispensing component along the rotation direction of the cleaning component, enabling the cleaning component to be heated while still being filled with cleaning liquid. On one hand, the presence of cleaning liquid increases the heat transfer medium on the cleaning component. As a heat transfer medium, the cleaning liquid forms a heat transfer channel between the heating component and the cleaning component, significantly improving the heat transfer efficiency and thus enhancing the heating effect of the cleaning component in a short time. On the other hand, during the rotation of the cleaning component, the cleaning liquid is subjected to centrifugal force, causing more cleaning liquid to move towards the surface of the cleaning component and contact the heating component. The heating component can enhance the heating effect on the cleaning component by heating the cleaning liquid and utilizing the penetration of the cleaning liquid into the cleaning component, thereby improving the hot water floor cleaning function of the surface cleaning device in this application. Furthermore, when uneven heat distribution from the heating element to the cleaning component leads to excessively high local temperatures on the outer surface, the cleaning fluid evaporates due to the high heat. During evaporation, it absorbs heat from the surrounding environment, lowering the temperature of the bristles or brush cloth on the outer surface of the cleaning component, thus eliminating the risk of dry burning. The heated cleaning fluid gradually penetrates to the roots of the bristles, causing the overall temperature of the bristles to rise evenly. During subsequent rotation, it continuously transfers heat to the surface to be cleaned, improving the cleaning effect.

[0034] Furthermore, since the cleaning component rotates continuously, it reaches a high temperature after being heated by the heating element and then wipes the surface to be cleaned. After wiping, some of the heat from the cleaning component is transferred to the surface to be cleaned, and the temperature of the cleaning component itself is reduced to a certain extent, reaching a "warm" state. The cleaning component continues to rotate in this warm state, and the cleaning fluid sprayed onto it by the dispensing element is preheated by the warm cleaning component, slowly increasing its temperature. When it enters the main heating area in contact with the heating element, the small temperature difference between the cleaning fluid and the heating element prevents uneven heating of the liquid caused by rapid temperature rise, thus avoiding localized overheating due to a large temperature gradient. Simultaneously, compared to traditional technologies where the cleaning fluid directly contacts the "high-temperature" cleaning component heated by the heating element, the smaller temperature difference between the cleaning fluid and the cleaning component in this application prevents rapid temperature loss of the cleaning component, thereby avoiding fiber damage to the outer surface tufts caused by large temperature fluctuations and helping to extend the service life of the cleaning component.

[0035] Based on the above solution, as the cleaning component's outer surface brush or bristles wear down and thin with continuous use, the heating element is relatively floating relative to the brush housing. This allows the heating element to maintain a relatively stable contact force with the cleaning component, thereby ensuring the heating effect on the cleaning component and guaranteeing the heating effect throughout the entire life cycle of the surface cleaning device. Consequently, it ensures the stability of the cleaning effect on the surface to be cleaned. Furthermore, due to the presence of the immersion gap in this application, the cleaning component is fully immersed in the cleaning liquid before being heated by the heating element. The cleaning liquid shares the heat conducted by the heating element, so even if the heating element is always in close contact with the cleaning component, the cleaning component will not be damaged by dry burning due to the high heat of the heating element.

[0036] Finally, because the dispensing component is arranged independently of the heating component and there is no direct heat conduction path between them, the cleaning fluid flowing inside the dispensing component is always at room temperature, fundamentally preventing scale buildup in the dispensing holes or pipes and extending the service life of the dispensing component. At the same time, it reduces the maintenance cost of the dispensing component, eliminating the need to regularly use acidic cleaning agents to remove scale from the dispensing component, avoiding the risk of acidic liquid corrosion, and reducing the complexity of user maintenance. Furthermore, the dispensing component can be made of ordinary engineering plastics, without the need for high-temperature resistant or corrosion-resistant materials, which helps to reduce the overall cost of the machine. Attached Figure Description

[0037] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0038] Figure 1 This is a top view of a ground brush according to an embodiment of this application;

[0039] Figure 2 for Figure 1 Cross-sectional view of section AA;

[0040] Figure 3 for Figure 2 Enlarged view of part D;

[0041] Figure 4 for Figure 1 Cross-sectional view of section BB;

[0042] Figure 5 This is a partial cross-sectional view of the heating element located on the extension of the floor brush in Embodiment 1;

[0043] Figure 6 This is a schematic diagram showing the connection between the extension of the floor brush and the upper housing.

[0044] Figure 7 This is an exploded view of the upper housing of the floor brush in Embodiment 1;

[0045] Figure 8 This is a top view of the ground brush in Embodiment 2 of this application;

[0046] Figure 9 for Figure 8 A sectional view of the CC section;

[0047] Figure 10 For Figure 9 Enlarged view of point E in the image;

[0048] Figure 11 This is a schematic diagram showing the connection between the extension and the upper housing in Embodiment 2 of this application;

[0049] Figure 12 This is a partial cross-sectional view of the extension of the floor brush in Embodiment 3 of this application;

[0050] Figure 13 This is a partial cross-sectional view of the upper housing of the floor brush installed on the lower housing in Embodiment 4 of this application.

[0051] List of components and reference numerals:

[0052] 1 Cleaning component; 2 Heating component; 21 Heating element; 23 Positioning bracket; 3 Dispensing component; 31 Dispensing hole; 32 Dispensing body; 33 Extension; 34 Positioning rib; 35 Dispensing plate; 351 Arc section; 4 Liquid storage gap; 5 Wetting gap; 6 Scraping component; 7 Floor brush housing; 71 Upper housing; 711 Body; 712 Extension; 7121 Mounting cavity; 72 Lower housing; 8 Top cover; 9 Elastic component; 10 Receiving cavity; 110 Reinforcing arm; 120 Bending flange; 130 Cable routing cavity; 140 Power cord; 150 Elastic sealing component; 1501 Sealing rib; 160 Flanged edge; 161 Positioning groove; 170 Straight section; 180 Vertical protrusion; 190 Support platform; 200 Wetting extension; 210 Sealing component; 220 Recess; 230 Pressure cap; 240 Extension; 2401 Mounting groove. Detailed Implementation

[0053] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0054] Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below. It should be noted that, unless otherwise specified, the embodiments of this application and the features thereof can be combined with each other.

[0055] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0056] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0057] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0058] Example 1:

[0059] Surface cleaning devices for cleaning surfaces include handheld cleaning machines such as floor scrubbers and vacuum cleaners, and self-propelled cleaning machines such as robotic vacuum cleaners and mopping robots. This first embodiment uses a floor scrubber as an example to illustrate the solution. Those skilled in the art will understand that this solution can also be applied to any of the aforementioned surface cleaning machines used for cleaning surfaces.

[0060] The surface cleaning machine includes a machine body and a floor brush pivotally connected to the machine body. The floor brush includes a floor brush housing 7, within which a cleaning component 1 is provided, capable of wiping the surface to be cleaned by rotation. The cleaning component 1 can be any wiping part that can be rotated to wipe the surface to be cleaned, such as a single cleaning roller, a double cleaning roller, or a tracked cleaning cloth. This embodiment 1 uses a single-roller cleaning component as an example to illustrate the solution. The technical solution of this application is still applicable in structural designs such as double-roller cleaning components and tracked cleaning cloths. The floor brush housing 7 also includes a liquid dispensing component 3. When the cleaning component 1 wipes and cleans the surface to be cleaned, the liquid dispensing component 3 can spray cleaning liquid onto the outer surface of the cleaning component 1. Depending on the cleaning needs, the cleaning liquid can be detergent, water, etc. The cleaning liquid wets the bristles on the outer surface of the cleaning component 1 to increase the cleaning effect on the surface to be cleaned. The cleaning component includes a roller and a cleaning cloth sleeved on the roller, the cleaning cloth having bristles.

[0061] like Figures 1 to 3 As shown, the floor brush housing 7 also includes a scraping component 6 and a heating component 2. The scraping component 6 abuts against the cleaning component 1 to scrape the cleaning component 1. The dispensing component 3 is used to supply cleaning liquid to the cleaning component 1. Along the rotation direction of the cleaning component 1, the scraping component 6 is located on the upstream side of the dispensing component 3, and the heating component 2 is located on the downstream side of the dispensing component 3. An immersion gap 5 is provided between the dispensing component 3 and the heating component 2. The heating component 2 is floating relative to the floor brush housing 7 so that the outer surface of the heating component 2 is in contact with the cleaning component 1 for heating the cleaning component 1 and the cleaning liquid on the cleaning component 1.

[0062] In this application, the scraping component 6, the liquid dispensing component 3, and the heating component 2 are arranged sequentially from upstream to downstream along the rotation direction of the cleaning component 1. This allows the cleaning component 1 to first be scraped and drained of dirt by the scraping component 6, then sprayed by the liquid dispensing component 3, and finally heated by the heating component 2. The heating component 2 is positioned later than the liquid dispensing component 3 along the rotation direction of the cleaning component 1, enabling the cleaning component 1 to be heated while still being filled with cleaning liquid. On the one hand, the presence of cleaning liquid increases the heat transfer medium on the cleaning component 1. As a heat transfer medium, the cleaning liquid forms a heat transfer channel between the heating component 2 and the cleaning component 1, significantly improving the heat transfer efficiency and thus enhancing the heating effect of the cleaning component 1 in a short time. On the other hand, during the rotation of the cleaning component 1, the cleaning liquid is subjected to centrifugal force, causing more cleaning liquid to move towards the surface of the cleaning component 1 and contact the heating component 2. The heating component 2 can enhance the heating effect on the cleaning component 1 by heating the cleaning liquid and utilizing the penetration of the cleaning liquid into the cleaning component 1, thereby improving the hot water floor cleaning function of the surface cleaning device. Furthermore, when uneven heat distribution from the heating element 21 to the cleaning component 1 leads to excessively high local temperatures on the outer surface of the cleaning component 1, the cleaning fluid evaporates due to the high heat. During evaporation, it absorbs heat from the surrounding environment, reducing the temperature of the bristles or brush cloth on the outer surface of the cleaning component 1, thereby eliminating the risk of dry burning. The heated cleaning fluid gradually penetrates to the roots of the bristles on the cleaning component 1, causing the overall temperature of the bristles to rise evenly. During subsequent rotation, it continuously transfers heat to the surface to be cleaned, improving the cleaning effect.

[0063] Furthermore, since the cleaning component 1 rotates continuously, it reaches a high temperature after being heated by the heating component 2 and wipes the surface to be cleaned. After wiping, some of the heat from the cleaning component 1 is transferred to the surface to be cleaned, and the temperature of the cleaning component 1 itself is reduced to a certain extent, reaching a "warm" state. While the cleaning component 1 continues to rotate in this warm state, the cleaning liquid sprayed onto the cleaning component 1 by the dispensing component 3 is preheated by the warm cleaning component 1, and the temperature of the cleaning liquid is slowly increased. When it enters the main heating area in contact with the heating component 2, the temperature difference between the cleaning liquid and the heating component 2 is small, which avoids uneven internal heating of the liquid caused by rapid temperature rise, and thus avoids local overheating caused by a large temperature gradient. Meanwhile, compared with the traditional technology where the cleaning liquid directly contacts the "high-temperature" cleaning component 1 heated by the heating element 2, the solution of this application has a smaller temperature difference between the cleaning liquid and the cleaning component 1 when they come into contact, which avoids the rapid temperature loss of the cleaning component 1, thereby avoiding fiber damage to the tufts on the outer surface of the cleaning component 1 caused by large temperature and cold alternation, and helps to improve the service life of the cleaning component 1.

[0064] Based on the above scheme, as the cleaning component 1 is used continuously, the brush cloth or bristles on its outer surface become thinner due to wear. The heating element 2 is floating relative to the brush housing 7, so that the heating element 2 can always maintain a relatively stable contact force with the cleaning component 1, thereby ensuring the heating effect on the cleaning component 1. This ensures the heating effect of the heating element 2 on the cleaning component 1 throughout the entire life cycle of the surface cleaning device, and thus ensures the stability of the cleaning effect of the cleaning component 1 on the surface to be cleaned. Furthermore, due to the presence of the immersion gap 5 in this application, the cleaning component 1 is fully immersed in the cleaning liquid before being heated by the heating element 21. The cleaning liquid shares the heat conducted by the heating element 2. Therefore, even if the heating element 2 is always in close contact with the cleaning component 1, the cleaning component 1 will not be damaged by dry burning due to the high heat of the heating element 2.

[0065] Furthermore, since the dispensing component 3 is arranged independently of the heating component 2, and there is no direct heat conduction path between the two, the cleaning fluid flowing inside the dispensing component 3 is always at room temperature, fundamentally preventing scale from depositing in the dispensing holes or pipes and extending the service life of the dispensing component 3. At the same time, it reduces the maintenance cost of the dispensing component 3, eliminating the need to regularly use acidic cleaning agents to remove scale from the dispensing component 3, avoiding the risk of acidic liquid corrosion, and reducing the complexity of user maintenance. Moreover, the dispensing component 3 can be made of ordinary engineering plastics, without the need for high-temperature resistant or corrosion-resistant materials, which helps to reduce the overall cost of the machine.

[0066] When the surface cleaning device is performing cleaning work, the liquid distribution component 3 supplies liquid to the cleaning component 1, wetting it. The heating component 2 is always in contact with the cleaning component 1 and its bristles, thereby heating the wetted cleaning component 1. Due to the floating setting of the heating component 2 and the wetting gap 5 between the heating component 2 and the liquid distribution component 3, the cleaning liquid is evenly supplied to the cleaning component 1 and its bristles below the heating component 2, so that the cleaning component 1 is heated quickly and continuously rotates to wipe the dirty surface to be cleaned. The wear on the bristles of the cleaning component 1 is small, and the contact between the heating component 2 and the bristles of the cleaning component 1 is always maintained, thereby ensuring effective heat transfer. The scraping component 6 continuously scrapes the dirt and / or dirty liquid on the cleaning component, and the suction fan works to suck away the dirt and / or dirty liquid, thereby completing the cleaning work. This achieves efficient hot water cleaning, with good cleaning effect and extends the service life of the cleaning component 1. When the surface cleaning device finishes its cleaning work, and it is time to clean part 1, the surface cleaning device is placed on the base, the floor brush is placed on the tray of the base, and a cleaning tank is set at the front of the tray. Part 1 is located above the cleaning tank. During the cleaning process of part 1, the liquid supply system continues to spray water into part 1 or the cleaning tank. The cleaning component 2 rotates, and the scraping component 6 scrapes off the sewage on part 1. At this time, the heating component 2 continues to heat part 1, raising the temperature of part 1 so that the dirt or sludge on part 1 can be better mixed with hot water or hot cleaning liquid, and then further washed by the cleaning sprayed from the dispensing component 3, which improves the solubility of dirt in hot water and thus improves the cleaning effect of part 1. Since the scraper 6 is located upstream of the heating element 2, as the cleaning element 1 rotates, the movement path of each point on the outer surface of the cleaning element 1 first passes through the scraper 6. The sewage on the outer surface of the cleaning element 1 is scraped off by the scraper 6 to the suction port and is drawn away by the suction fan. The water sprayed out by the liquid separator 3 continues to wash the outer surface of the cleaning element 1. The sprayed water accumulates in the liquid storage gap 4, so that the cleaning element 1 and its bristles that move to the liquid storage gap 4 are washed. After being washed, the cleaning element 1 continues to move to the heating element 2 and is heated. The heating element 2 is for the cleaning element 1 and its bristles that have been washed and contain more water. The problem of the cleaning element 1 with drier dirt being directly heated by the heating element 2, causing the dirt to further condense on the bristles and become difficult to clean, is not present. This reduces the probability that the cleaning element 1 and its bristles with more sewage will immediately come into contact with the heating element 2, thereby avoiding the sewage on the cleaning element 1 from drying on the bristles due to heat and becoming difficult to clean.Furthermore, after the cleaning process is completed, the heating element 2 can also assist the cleaning element 1 in heating and drying. Due to the floating setting of the heating element 2, it is ensured that the cleaning element 1 and its bristles can always be in good contact with the heating element 2. When the bristles of the cleaning element 1 contain a lot of water, the bristles are squeezed and flattened on the roller of the cleaning element 1 by the scraping element 4. Then the heating element 2 can quickly transfer heat to the cleaning element 1 through the bristles and its moisture. The cleaning element 1 and its bristles have high heat absorption efficiency, which makes the moisture in the bristles evaporate. As the bristles gradually dry, they gradually stand up, and the heating element 2 is also lifted up. Due to the presence of the elastic element 9, the heating element 2 can still be in contact with the bristles of the cleaning element 1 and transfer heat through the air between the bristles to further dry the roots of the bristles.

[0067] This invention covers the cleaning element 1 with the extension 712, so that the heating element 2, which is disposed on the extension 712, is also located above the cleaning element 1. The cleaning liquid sprayed from the dispensing element 3, after falling onto the outer surface of the cleaning element 1, moves tangentially along the outer surface of the cleaning element 1 under the action of gravity and centrifugal force, thus moving with the cleaning element 1 to below the heating element 2. Since the heating element 2 is floatingly disposed on the extension 712 and adheres to the bristles of the cleaning element 1, the centrifugal force of the cleaning liquid moving along the wetting gap 5 to the heating element 2 is suppressed by the heating element 2, preventing it from being thrown out tangentially along the cleaning element 1. Instead, it is evenly distributed within the bristles of the cleaning element 1 by the obstruction of the heating element 2 and the action of gravity, and moves with the cleaning element 1 and its bristles to below the heating element 2. Heating element 2 heats the bristles, and simultaneously, the tips of the bristles that move below heating element 2 are also heated. Heat can be transferred to the roots of the bristles through the moisture in the bristle tips and the gaps between the bristles. Then, the entire cleaning element 1 is heated by the continuous rotation of the cleaning element 1. Therefore, this technical solution makes the cleaning liquid distribution more uniform, which helps to achieve uniform heating of the cleaning liquid by heating element 2 and reduces the probability of uneven heating caused by uneven distribution of cleaning liquid. Since the cleaning liquid in the gaps between the bristles is more uniform, the heating of the cleaning element 1 is also more uniform. This not only avoids the problem of localized dry bristles and dry burning, but also allows the cleaning element 1 to absorb heat from heating element 2 through multiple channels, further improving heating efficiency. This not only improves the cleaning effect, but also makes it more efficient and energy-saving.

[0068] As a preferred embodiment of this application, such as Figure 2 , Figure 3 As shown, the floor brush housing 7 includes an upper housing 71 and a lower housing 72. The upper housing 71 includes a main body 711 and an extension 712. The main body 711 and the lower housing 72 cooperate to form a receiving cavity 10. The extension 712 extends forward from the opening of the receiving cavity 10 to cover the cleaning component 1. The heating component 2 is floatingly disposed on the extension 712.

[0069] The floor brush housing 7 is configured to include an upper housing 71 and a lower housing 72. The body portion 711 of the upper housing 71 and the lower housing 72 cooperate to form a receiving cavity 10. The internal space of the receiving cavity 10 can be used to install various components of the surface cleaning device, such as motors and pipelines, thus optimizing the structural layout of the surface cleaning device. In addition, the extension portion 712 provides a stable and maintainable mounting base for the heating element 2, and the extension portion 712 can be manufactured integrally with the body portion 711, reducing the assembly pressure of the floor brush housing 7 and helping to improve the manufacturing efficiency of the surface cleaning device. Furthermore, since the extension portion 712 extends outward from the body portion 711, it forms a heating element 2 mounting area independent of the receiving cavity 10, isolating the heating element 2 from the various components inside the receiving cavity 10, reducing the impact of the heating element 2 on core components such as the motor and the liquid distribution component 3 inside the receiving cavity 10, and ensuring the operational stability of the surface cleaning device. Meanwhile, the cantilever design of the extension 712 ensures that the heating element 2 can follow the rotation trajectory of the cleaning element 1, avoiding interference from other components with the heating element 2.

[0070] As a preferred example of this implementation, such as Figure 2 , Figure 3 As shown, the heating element 2 is mounted on the extension 712 via a positioning bracket 23, which extends toward the accommodating cavity 10.

[0071] The positioning bracket 23 ensures a more secure connection between the heating element 2 and the extension 712, effectively resisting vibrations and centrifugal forces generated during the rotation of the cleaning element 1. This prevents the heating element 2 from loosening or shifting due to prolonged use, ensuring a tight fit between the heating element 2 and the cleaning element 1. Simultaneously, it stabilizes the floating trajectory of the heating element 2. Even when the cleaning element 1 rotates at high speed or encounters impacts from uneven ground, the heating element 2 remains stable under the support of the positioning bracket 23, ensuring uniform contact with the cleaning element 1 and reducing the probability of uneven heat conduction caused by varying pressure between the heating element 2 and the cleaning element 1. Furthermore, the modular design of the positioning bracket 23 allows for quick separation of the heating element 2 from the extension 712, enabling users to replace or maintain the heating element 2 without disassembling the main body of the floor brush, significantly improving the maintainability of the equipment. Furthermore, the positioning bracket 23 extending towards the accommodating cavity 10 increases the distance between the heating element 2 and the liquid distribution element 3, thereby extending the length of the wetting gap 5. This provides the cleaning fluid with more space to wet the outer surface of the cleaning element 1, ensuring stable heating of the cleaning fluid. Moreover, the extension of the positioning bracket 23 towards the accommodating cavity 10 simultaneously increases the distance between the heating element 2 and the internal components of the accommodating cavity 10, effectively separating the heating area near the heating element 2 from sensitive components such as the motor and battery within the accommodating cavity 10. This prevents heat from being directly transferred to electronic components, ensuring the reliability of the entire machine's operation.

[0072] As a preferred method in this example, such as Figure 2 As shown, an elastic element 9 is provided between the positioning bracket 23 and the extension 712. The elastic element 9 can be, for example, a spring. The elasticity of the elastic element 9 enables the floating assembly of the positioning bracket 23 and the top cover 8. Preferably, the positioning bracket 23 and the extension 712 are respectively provided with a first limiting protrusion and a second limiting protrusion that are positioned opposite each other. The spring is respectively sleeved on the first limiting protrusion and the second limiting protrusion and abuts against the extension 712 and the positioning bracket 23 respectively.

[0073] As another preferred method in this example, such as Figure 2 , Figure 7 As shown, the surface cleaning device also includes an elastic seal 150, which is disposed on the positioning bracket 23 and the extension 712 to seal the gap between the mounting component and the extension 712.

[0074] The elastic seal 150 seals the gap between the positioning bracket 23 and the extension 712, preventing wastewater on the cleaning component 1 from being thrown into the extension 712 under centrifugal force, thus providing a more stable working environment for the other components installed inside the upper housing 71. On the other hand, the heating component 2 abuts against the cleaning component 1 and is mounted on the extension 712 via the positioning bracket 23. When the cleaning component 1 rotates, relative friction occurs between it and the heating component 2, causing the heating component 2 to vibrate. Especially when the surface cleaning device passes over obstacles or uneven surfaces to be cleaned, the force exerted by the cleaning component 1 on the heating component 2 increases, and the force on the heating component 2 is transmitted to the positioning bracket 23. Because of the elastic seal 150, when the positioning bracket 23 is affected by the force of the heating element 2 and has a tendency to shift, the elastic seal 150 can provide a certain support for the positioning bracket 23, preventing the positioning bracket 23 from shifting excessively. Moreover, the slight shift of the positioning bracket 23 will cause the elastic seal 150 to deform. The elastic potential energy brought about by the deformation of the elastic seal 150 will assist the positioning bracket 23 in resetting when it resets, thus improving the installation stability of the heating element 2 in many ways.

[0075] Furthermore, such as Figure 2 As shown, the elastic seal 150 has a sealing rib 1501 on the side facing the positioning bracket 23 to enhance the sealing effect of the elastic seal 150.

[0076] The central angle α corresponding to the coverage area of ​​the cleaning component along the circumference of the wetting gap is α, where α satisfies: 5° ≤ α ≤ 40°. In this embodiment, as... Figure 2As shown, the central angle α corresponding to the coverage area of ​​the cleaning component 1 along the circumference of the wetting gap 5 is α, where α satisfies: 15 ≤ α ≤ 40°. This central angle α is the coverage angle of the cleaning component 1 along the circumference of the wetting gap 5, and its value is between 15° and 40°, including the endpoints of 15° and 40°. This range allows the cleaning fluid to fully wet the cleaning component 1 before being heated by the heating element 2, ensuring that the cleaning component 1 absorbs sufficient moisture. When the cleaning component 1, fully wetted by the cleaning fluid, reaches the heating element 2, the cleaning fluid absorbs heat more quickly, allowing the heat to be rapidly conducted and penetrated into the cleaning component 1, rapidly increasing its temperature and maintaining the heat for a longer period. Simultaneously, it avoids over-wetting, which would lead to waste of cleaning fluid. Furthermore, it optimizes the structural layout of the floor brush, increasing its overall compactness and facilitating miniaturization. It is precisely because of the positioning bracket 23 that the length of the wetting gap 5 is extended, resulting in a larger angle range for α, thereby optimizing the wetting effect.

[0077] As another preferred example of this implementation, such as Figure 2 and Figure 3 As shown, the extension 712 has a downward-facing mounting cavity 7121. The heating element 2 includes a heating element 21 and an elastic element 9. The liquid distribution element 3 includes a liquid distribution body 32 with flow channels and a liquid distribution plate 35 with multiple liquid outlet holes 31. The front end of the liquid distribution body 32 has an opening, and the liquid distribution plate 35 covers the opening. At least two liquid outlet holes 31 are provided corresponding to one flow channel. There are multiple flow channels. In this example, there are 16 flow channels, which are located in different layers of the liquid distribution body 32. There are 32 water outlet holes to achieve uniform water supply. The dispensing plate 35 includes an arc-shaped section 351 and a straight section 170 extending upward along the arc-shaped section 351. The outlet hole 31 is located on the arc-shaped section 351. A flange 160 is provided near the lower end of the positioning bracket 23 of the dispensing component 3. A positioning groove 161 is provided on the back side of the flange 160. A positioning rib 34 is provided near the lower end of the extension 712 of the dispensing component 3. The positioning bracket 23 is installed on the extension 42 from the lower end. The positioning rib 34 is inserted into the positioning groove 161, thereby placing the heating element 21 in the extension 712. Inside the mounting cavity 7121 of 2, the elastic element 9 is located between the heating element 21 and the top wall of the mounting cavity 7121 and drives the heating element 21 to float along the mounting cavity 7121. The outer surface of the heating element 21 is at least flush with the cavity opening. In this embodiment, the bottom of the heating element 41 protrudes from the cavity opening so that the outer surface of the heating element 41 can always fit with the tufts of hair on the outer periphery of the cleaning element 1. The positioning bracket 23 has a gap with the cleaning element 1, so as not to cause a large resistance to the rotation of the cleaning element 1.

[0078] The lower end face of the positioning bracket 23 near the liquid distribution plate 43 is also an arc surface with the same curvature as the cleaning component 1. The straight section 170 of the liquid distribution plate is connected to the flange 160 of the positioning bracket 23 so that the arc section 351 and the lower surface of the positioning bracket 23 are smoothly connected as an integral arc surface, so that the lower end face of the positioning bracket 23 and a part of the arc section 351 separate the liquid outlet 31 from the heating component 2, forming an immersion gap 5. In this embodiment, the central angle α corresponding to the arc length of the immersion gap 5 is 15°-40°. The lower end face 61 of the positioning bracket 23 near the liquid distribution component, the arc section 351 and the cleaning component 1 have a gap. Liquid flows out from the liquid outlet 31 on the liquid distribution plate 35. Because the scraper 6 and the cleaning component 1 are in contact, and the heating component 2 and the bristles of the cleaning component 1 are in contact, the liquid accumulates in the gap. The upper surface of the scraper 6, the lower end face of the positioning bracket 23 near the liquid distribution component 3, the arc section 351 of the liquid distribution component 3 and the outer periphery of the cleaning component 1 form a liquid storage gap 4. Because the flange 160 of the positioning bracket 6 is aligned with the straight section 170 of the dispensing plate 35, when the wastewater on the cleaning component 1 is splashed outward by centrifugal force, it is difficult for the wastewater to enter the gap between the flange 160 of the positioning bracket 23 and the straight section 170 of the dispensing component 3. Even if a very small amount of wastewater splashes into the gap between the flange 160 of the positioning bracket 23 and the straight section 170 of the dispensing component 3, and this gap is relatively long, it is difficult for wastewater to pass through the gap and enter the interior of the upper housing 71. Since this gap is longitudinal, it is also difficult for wastewater to remain inside due to gravity. On the other hand, since the heating component 2 and the cleaning component 1 are in contact, the rotation of the cleaning component 1 may exert a reaction force on the heating component 2, causing the heating component 2 to vibrate. This will cause slight vibrations in the mounting bracket 8, ensuring a stable connection and limiting between the positioning bracket 23 and its flange 160 and the upper housing 71. The liquid distribution component 3 is installed in the frame-shaped mounting bracket on the front side of the lower housing 72. The docking of the positioning bracket 23 and the flange 160 with the liquid distribution component 3 strengthens the connection between the liquid distribution component 3 and the positioning bracket 23, making the liquid distribution component 3, the positioning bracket 23, and the upper housing 71 form a stable integrated structure. This effectively fixes the heating element 2 in the mounting cavity 7121 of the extension 712. Even if the positioning bracket 23 vibrates, the liquid distribution component 3 and the upper housing 71 can bear part of the force from the positioning bracket 23, enhancing the installation stability of the positioning bracket 23 for the heating element 2. The liquid storage gap 4 can temporarily store some cleaning liquid, prolonging the residence time of the liquid on the brush cloth, ensuring that the cleaning liquid fully wets the brush cloth or bristle fibers on the outer surface of the cleaning element 1 before entering the heating area.

[0079] Of course, it is understandable that an elastic seal 150 could be provided between the flange 160 and the straight section 170 of the distribution plate 35. In this way, the gap between the positioning bracket 23 and the distribution component 3 can be sealed, preventing sewage from entering the upper housing 71 through the gap. The position of the outlet hole 31 extends the length of the wetting gap 5, which helps to increase the wetting effect of the cleaning fluid on the cleaning component 1 and its bristles.

[0080] An installation cavity 7121 with its opening facing downwards is provided by the extension 712, and the heating element 21 and the elastic member 9 are integrated into the installation cavity 7121, realizing the adaptive floating and precise positioning of the heating element 21. The downward-facing design of the installation cavity 7121 allows the heating element 21 to naturally adhere to the surface of the cleaning part 1 under the action of gravity. The elastic member 9 is located between the heating element 21 and the top wall of the installation cavity 7121, and can dynamically adjust the floating stroke of the heating element 21 according to the wear degree of the cleaning part 1, ensuring that the contact pressure of the heating element 21 on the cleaning part 1 is always maintained within the preset range. At the same time, when the surface cleaning device moves to a bumpy or undulating area, the cleaning part 1 may be affected by the fluctuation of the surface to be cleaned. The heating element 21 maintains the stability of the contact force with the cleaning part 1 under the action of elasticity, thereby improving the heating stability of the cleaning part 1 in multiple ways. The design of the heating element 21, with its outer surface at least flush with the cavity opening, ensures that it is always in contact with the surface of the cleaning component 1. Even if the brush cloth thins due to long-term use, the heating element 21 can still compensate for the gap under the push of the elastic component 9, preventing heat loss. The closed structure of the mounting cavity 7121 also prevents cleaning liquid or stains from entering the interior of the heating element 2, providing dust and water protection and extending the life of the heating element 21.

[0081] In a preferred embodiment of this example, the outer surface of the heating element 21 facing the cleaning component 1 has a heating surface. The heating surface is concave and arc-shaped, and the curvature of the heating surface is the same as or similar to the curvature of the outer surface of the cleaning component 1. This allows the heating element 21 to achieve a better fit with the cleaning component 1, thereby enhancing the heating effect of the heating element 21 on the cleaning component 1. This example does not limit the shape and structure of the outer surface of the heating element 21. In another embodiment, the outer surface of the heating element 21 is planar.

[0082] In a preferred embodiment of this example, the heating element 21 includes a PTC thermistor and a heat-conducting portion covering the outer surface of the PTC thermistor. The heat-conducting portion can be a thermally conductive silicone part or a thermally conductive ceramic part. This application preferably uses a thermally conductive silicone part, which can reduce wear between the heating element 21 and the cleaning part 1, and make the heating element 21 have a better fit to the outer surface of the cleaning part 1. In addition, using a PTC thermistor as the heating source of the heating element 21 has the following advantages: the PTC thermistor can automatically adjust the heating power according to temperature changes. When the temperature of the cleaning part 1 is too high, the PTC thermistor automatically reduces the heating temperature, effectively avoiding overheating.

[0083] In another embodiment, the heating element 21 can be constructed as a cast aluminum heating element 21, which is formed by embedding a heating wire in an aluminum alloy shell.

[0084] It should be noted that, as mentioned in this example, the outer surface of the heating element 21 is at least flush with the cavity opening. This means that the outer surface of the heating element 21 is flush with the cavity opening. This solution maximizes the compression of the vertical height of the mounting cavity 7121 while ensuring that the heating element 21 can fit against the outer surface of the cleaning component 1, thereby reducing the vertical height occupied by the extension 712. This helps to flatten the surface cleaning device and improve the passability of the surface cleaning device. In this embodiment, the depth of the mounting cavity 7121 is slightly greater than the thickness of the heating element 21, providing space for the heating element 21 to float up and down.

[0085] Alternatively, the heating element 21 can protrude out of the cavity opening, that is, the outer surface of the heating element 21 facing the cleaning component 1 is located below the cavity opening. In this scheme, when the heating element 2 is in contact with the outer surface of the cleaning component 1, the cavity opening and the outer surface of the cleaning component 1 are spaced apart, which can reduce the probability of dirt attached to the outer surface of the cleaning component 1 entering the installation cavity 7121.

[0086] As another preferred method in this example, such as Figures 4 to 7 As shown, the extension 712 protrudes outward in the direction away from the cleaning component 1 and forms a mounting cavity 7121 on the inner side. The length of the extension 712 is less than the length of the main body 711. The extension 712 is provided with reinforcing arms 110 on both sides of the mounting cavity 7121. The reinforcing arms 110 extend towards the main body 711 to the receiving cavity 10.

[0087] Since the extension 712 protrudes outward in the direction away from the cleaning component 1, the extension 712 is in a cantilever state. By providing reinforcing arms 110 on both sides of the mounting cavity 7121, the rigidity and vibration resistance of the extension 712 are significantly improved. The design of the extension 712 protruding outward in the direction away from the cleaning component 1 provides sufficient space for the mounting cavity 7121 without increasing the overall thickness of the floor brush, ensuring that the heating element 21 is not interfered with by the surrounding structure when it floats. The reinforcing arms 110 extend from both sides of the mounting cavity 7121 toward the main body 711 and into the receiving cavity 10, forming a stable support structure. This effectively disperses the torque and vibration energy applied to the extension 712 when the cleaning component 1 rotates, preventing fatigue deformation of the extension 712 due to long-term stress in the cantilever state. The design of the extension 712 being shorter than the main body 711 allows the mounting cavity 7121 to be closer to the center of gravity of the floor brush, reducing the inertial torque during the operation of the floor brush and improving the operational flexibility of the surface cleaning device.

[0088] It should be noted that, in this method, the reinforcing arm 110 can be configured as follows: Figure 4 , Figure 6 The extension shown extends into the cavity 10, or the reinforcing arm 110 extends to a point where it abuts against the cavity 10. Preferably, the reinforcing arm 110 is designed to extend into the cavity 10, which can enhance the connection strength between the reinforcing arm 110 and the extension 712 and the main body 711, and help improve the structural stability of the extension 712.

[0089] Furthermore, such as Figure 2 As shown, the main body 711 has a bent flange 120 between the accommodating cavity 10 and the mounting cavity 7121. The bent flange 120 and the outer wall of the accommodating cavity 10 cooperate to form a mounting groove for mounting the liquid dispensing component 3. One end of the extension 712 is connected to the bent flange 120, and the other end extends upward to the top of the cleaning component 1. The mounting cavity 7121 is located on the side of the bent flange 120 away from the accommodating cavity 10. The reinforcing arm 110 passes through the bent flange 120 and extends into the accommodating cavity 10.

[0090] The bent flange 120 is located between the receiving cavity 10 and the mounting cavity 7121, serving both as a mounting base for the liquid distribution component 3 and as a structural reinforcement, reducing the possibility of stress concentration at the connection between the receiving cavity 10 and the extension 712. One end of the extension 712 is connected to the cavity wall of the mounting cavity 7121, and the other end extends upward to the top of the cleaning component 1, forming an enclosed structure that allows the heating component 2 to cover the top area of ​​the cleaning component 1, expanding the effective heating area. The design of the reinforcing arm 110 passing through the bent flange 120 and extending into the receiving cavity 10 significantly improves the connection strength between the extension 712 and the main body 711. The mounting cavity 7121 is located on the side of the bent flange 120 away from the receiving cavity 10, ensuring that the wetting gap 5 between the heating component 2 and the liquid distribution component 3 is not interfered with by the internal structure of the receiving mounting cavity 7121, resulting in a smoother liquid flow path.

[0091] Furthermore, such as Figure 4 , Figure 5 As shown, the floor brush housing 7 is also provided with a wiring cavity 130 that communicates with the mounting cavity 7121. The wiring cavity 130 is used to introduce the power cord 140 of the heating element 21 into the receiving cavity 10.

[0092] The wiring cavity 130 extends from the top of the mounting cavity 7121 into the accommodating cavity 10, forming a dedicated cable channel independent of other functional areas, thus preventing interference between the power cable 140 and cleaning fluid pipelines or mechanical transmission components. After the power cable 140 is led out from the heating element 21, it directly enters the controller interface inside the accommodating cavity 10 through the wiring cavity 130, effectively reducing the wiring path and minimizing the impact of external high-temperature environments on the accuracy of line transmission.

[0093] The wiring cavity 130 can be configured to be spaced apart from the receiving cavity 10. When the power cable 140 passes through the wiring cavity 130, it will extend a certain distance before entering the receiving cavity 10. Alternatively, the wiring cavity 130 can be configured to extend into the receiving cavity 10. Since the mounting cavity 7121 is located in the extension 712 and the receiving cavity 10 is located in the main body 711, the wiring cavity 130 serves to enhance the connection strength between the receiving cavity 10 and the mounting cavity 7121, thereby improving the structural stability of the extension 712.

[0094] Preferably, the wiring cavity 130 is abutted against the reinforcing arm 110. This arrangement optimizes the structural layout of the floor brush housing 7, reduces the space occupied by the wiring cavity 130 in the middle of the floor brush housing 7, and allows the floor brush housing 7 to provide more spacious installation space for other components.

[0095] More preferably, the cross-sectional dimension of the wiring cavity 130 is slightly larger than the diameter of the power line 140, and a silicone anti-wear bushing is provided on the inner wall of the wiring cavity 130 to prevent the power line 140 from being damaged by friction with the cavity of the wiring cavity 130 under vibration.

[0096] Furthermore, the upper housing 71 is fastened to the lower housing 72 and cooperates with the lower housing 72 to form a sandwich cavity. The wiring cavity 130 communicates with the sandwich cavity, and the power cable 140 passes through the wiring cavity 130 and enters the sandwich cavity. A water pump, an electrolytic water module, a motor, etc. are installed in the sandwich cavity. The water tank is located in the receiving cavity 10, and the front side of the water tank extends towards the front end of the surface cleaning device, that is, towards the cleaning component 1, and covers the mounting cavity 7121.

[0097] In this embodiment, the installation method of the heating element is not limited. In another example, the surface cleaning device does not have a positioning bracket 23, and the heating element 2 is directly installed on the upper housing 71 through the elastic element 9 and remains floating under the action of the elastic element 9. In another example, the elastic seal 150 can be constructed to be pre-installed on the positioning bracket 23 by means of overmolding or injection molding, and then the heating element 2 is installed on the positioning bracket 23 and then installed together on the upper housing 71.

[0098] Example 2:

[0099] The structural difference between this embodiment 2 and embodiment 1 lies in the installation method of the heating element 2 and the construction of the cleaning element 1.

[0100] This embodiment describes the structure of the cleaning component 1 as a double-roller brush. The cleaning component 1 includes a first roller and a second roller, a mounting bracket disposed between the first roller and the second roller, and a cleaning cloth sleeved over the first roller and the second roller, with bristles on the cleaning cloth. In this embodiment, the diameter of the first roller is smaller than the diameter of the second roller. Of course, the diameter of the first roller can also be set to be the same as the diameter of the second roller. A clutch structure can be provided on the mounting bracket to allow the first roller to move away from the second roller, thereby tightening the cleaning cloth. The first roller closest to the floor brush housing 7 is the driving roller. The cleaning component 1 is then installed on the floor brush through the side plate, connecting the driving roller to the transmission structure. Driven by the drive motor, the driving roller drives the driven roller to rotate, causing the cleaning cloth to move continuously, thereby wiping the surface to be cleaned. When it is necessary to remove the cleaning cloth from the cleaning component 1, the clutch structure is pressed, causing the second roller to move closer to the first roller, thereby loosening the cleaning cloth and removing it.

[0101] like Figure 8 , Figure 9 As shown, the floor brush housing 7 includes an upper housing 71 and a lower housing 72. The surface cleaning device includes a top cover 8 detachably mounted on the upper housing 71, and a heating element 2 floatingly mounted on the top cover 8. This embodiment is also applicable when the cleaning element 1 has a single roller structure.

[0102] The top cover 8 is used to shield the cleaning component 1, preventing the wastewater on the cleaning component 1 from splashing outwards. The top cover 8 is designed to be detachably connected to the floor brush, facilitating the cleaning of wastewater on the top cover 8. The heating component 2 is floatingly mounted on the top cover 8. On the one hand, this provides a mounting position for the heating component 2, achieving a relatively stable installation and ensuring that the heating component 2 can stably adhere to the surface of the cleaning component 1, achieving stable heating of the cleaning fluid. On the other hand, by floating the heating component 2 on the detachable top cover 8, the detachable design of the top cover 8 allows users to remove it from the floor brush housing 7 without tools, directly cleaning or replacing the surface of the heating component 2, avoiding problems such as stain accumulation and scale buildup caused by the non-removable heating component 2.

[0103] Preferably, such as Figure 9 As shown, the heating element 2 includes a positioning bracket 23 and a heating element 21 mounted on the positioning bracket 23.

[0104] In one example, the positioning bracket 23 is integrally formed with the top cover 8, thereby eliminating the need for additional assembly processes and auxiliary components such as connectors that would result from separate molding.

[0105] In another example, the positioning bracket 23 is detachably mounted on the top cover 8, which allows the user to repair or replace the heating element 2 by removing and installing the positioning bracket 23.

[0106] In another example, the positioning bracket 23 is floatingly mounted on the top cover 8, thereby ensuring close contact and heat transfer between the heating element 2 and the cleaning element 1, improving heat conduction efficiency. Furthermore, the floating mounting allows the heating element 2 a certain degree of freedom in the vertical direction to accommodate minor changes in the cleaning element 1, such as changes in the outer diameter of the cleaning element 1 due to wear or temperature variations, improving the stability and reliability of heat transfer between the heating element 2 and the cleaning element 1. In a specific implementation, an elastic element 9 is provided between the positioning bracket 23 and the top cover 8. The elastic element 9 can be, for example, a spring, and the elasticity of the elastic element 9 enables the floating assembly of the positioning bracket 23 and the top cover 8.

[0107] Preferably, the top cover 8 is made of plastic, and the bottom of the top cover 8 is recessed to form an inner cavity for accommodating the heating element 2. The lightweight material and hollow structure design of the top cover 8 reduce the overall weight while ensuring strength, reduce the inertial resistance during the operation of the floor brush, thereby reducing the motor load and extending the battery life.

[0108] Furthermore, such as Figures 8 to 10As shown, the liquid dispensing component 3 includes a liquid dispensing body 32 and an extension 33 connected to the liquid dispensing body 32 and extending along the circumference of the cleaning component 1. Along the rotation direction of the cleaning component 1, the extension 33 is located downstream of the liquid dispensing body 32. The liquid dispensing body 32 is provided with a liquid outlet hole 31. The extension 33 and the outer surface of the cleaning component 1 cooperate to form a liquid storage gap 4.

[0109] Similar to Embodiment 1, the liquid storage gap 4 in this embodiment is also used to temporarily store the cleaning fluid. This ensures a stable supply of cleaning fluid during the cleaning process and allows the cleaning fluid to fully wet the cleaning component 1 before reaching the heating element 2, improving the wetting effect and thus increasing the amount of cleaning fluid stored on the cleaning component 1. This provides a heat transfer medium for the subsequent heating of the heating element 2, enhancing the heating effect and improving the cleaning effect on the surface to be cleaned. Furthermore, during the rotation of the cleaning component 1, the cleaning fluid immersed in it is subjected to centrifugal force. The extension portion 33 stops the ejected cleaning fluid, allowing it to be temporarily stored in the liquid storage gap 4 or re-immersed in the cleaning component 1, reducing waste.

[0110] Unlike Embodiment 1, where the length of the liquid storage gap 4 is mainly determined by the length of the positioning bracket 23 extending towards the accommodating cavity 10, with the liquid distribution component 3 playing a minor role in extending the length of the liquid storage gap 4, in this embodiment, the liquid storage gap 4 is entirely formed by the extension portion 33 of the liquid distribution component 3 mating with the outer surface of the cleaning component 1. In other words, the biggest difference between the liquid storage gap 4 in this embodiment and that in Embodiment 1 is that in this embodiment, the cleaning liquid, after being sprayed from the liquid distribution port, first passes through the liquid storage gap 4, then through the wetting gap 5, and is then heated by the heating element 21; whereas in Embodiment 1, the liquid storage gap 4 covers the wetting gap 5, meaning the cleaning liquid simultaneously passes through the covered space of the liquid storage gap 4 and the wetting gap 5 before being heated by the heating element 21.

[0111] The extension 43 in this embodiment can be constructed in various ways. In one example, it can be as follows: Figure 10As shown, a vertical protrusion 180 is provided above the extension portion 33, and the vertical protrusion 180 and the extension portion 33 form a support platform 190. The top cover 8 includes an immersion extension portion 200 located above the immersion gap 5, and the immersion extension portion 200 is provided with a sealing member 210, which abuts against the support platform 190. In this example, the length of the immersion gap 5 is mainly determined by the distance from the liquid outlet 31 to the end of the extension portion 33 and the distance between the mounting bracket 8 and the extension portion 33, while the distance between the mounting bracket 8 and the extension portion 33 depends on the length of the immersion extension portion 200. That is, the reason for providing the immersion extension portion 200 on the top cover 8 in this example is to increase the length of the immersion gap 5 to improve the wetting effect of the cleaning liquid. The cleaning fluid adhering to the outer surface of the cleaning component 1 may be thrown out of the cleaning component 1 due to centrifugal force. The sealing component 210 acts as a stop and seal to prevent the cleaning fluid from entering the top cover 8. After the cleaning fluid moves to the outer surface of the sealing component 210, it will slide down under the action of gravity and fall back into the wetting gap 5, which helps to improve the utilization rate of the cleaning fluid.

[0112] As a preferred example of this embodiment, such as Figure 10 As shown, the central angle corresponding to the coverage area of ​​the cleaning part 1 along the circumference of the wetting gap 5 is α, and α satisfies: 5°≤α2≤25°.

[0113] The wetting gap here refers to the spacing between the dispensing element 3 and the heating element 2, so that the dispensing element 3 and the heating element 2 have a certain buffer distance along the rotation direction of the cleaning element 1, allowing the cleaning liquid to slowly wet the cleaning element 1 and fully moisten it. This distance can be as follows: Figure 10 The distance between the liquid separator 3 and the heating element 2 is the right end of the liquid separator 3; it can also be the distance between the liquid outlet 31 and the heating element 2; or it can be the left end of the liquid separator 3 and the heating element 2.

[0114] As a preferred example of this embodiment, such as Figure 9 , Figure 10 As shown, at least a portion of the liquid distribution component 3 is clearance-fitted with the cleaning component 1.

[0115] On the one hand, the clearance fit between the dispensing component 3 and the cleaning component 1 helps the cleaning fluid to be distributed more evenly on the cleaning component 1, improving the cleaning effect and reducing the scraping between the cleaning component 1 and the dispensing component 3 during rotation, thus ensuring the wetting effect of the cleaning fluid on the cleaning component 1. On the other hand, the clearance fit between the dispensing component 3 and the cleaning component 1 can reduce the risk of the outlet hole 31 on the dispensing component 3 being blocked, ensuring the smooth flow of the cleaning fluid from the dispensing component 3. Furthermore, the clearance fit can reduce the direct contact between the dispensing component 3 and the cleaning component 1, thereby reducing wear on the dispensing component 3 and the cleaning component 1 and extending their respective service life. In addition, the clearance fit allows the dispensing component 3 to adapt to minor changes in the cleaning component 1, such as changes in the outer diameter of the cleaning component 1 caused by wear or temperature changes, improving the stability and reliability of the fit between the dispensing component 3 and the cleaning component 1.

[0116] Preferably, such as Figure 11 As shown, a reinforcing arm 110 is connected between the upper housing 71 and the top cover 8. The reinforcing arm 110 helps to increase the installation strength of the top cover 8 and increase the installation stability of the top cover 8.

[0117] Example 3:

[0118] The structural difference between Embodiment 3 and Embodiment 1 lies in the installation method and specific construction of the heating element.

[0119] The floor brush described in this application includes an upper housing 71 and a lower housing 72, wherein the upper housing 71 is provided with an extension 240, such as... Figure 12 As shown, the extension 240 has a mounting groove 2401. The heating element includes a heating element 21, an elastic element 9, and a pressure cap that is fastened to the upper port of the mounting groove 2401. The heating element 21 is disposed in the mounting groove 2401. The elastic element 9 is installed on the pressure cap and abuts against the heating element 21 so that the heating element 21 floats along the mounting groove 2401. The outer surface of the heating element 21 is at least flush with the lower opening of the mounting groove 2401 so as to at least partially fit with the cleaning element 1.

[0120] The upper port of the mounting slot 2401 is sealed by a pressure cap, forming a space for accommodating the removable heating element 51. This allows the heating element 21 and the elastic member 9 to be pre-assembled as independent modules and then inserted into the mounting slot 2401 as a whole, greatly simplifying the assembly process. The elastic member 9 is installed between the pressure cap and the heating element 21, and its preset pre-tightening force precisely controls the contact pressure of the heating element 21 on the cleaning component 1, ensuring that the heating element maintains a stable fit with the cleaning component 1.

[0121] Preferably, the outer surface of the heating element 21 facing the cleaning component 1 is provided with a heating surface. The heating surface is concave arc shape, and the curvature of the heating surface is the same as or similar to the curvature of the outer surface of the cleaning component 1, so that the heating element 21 can achieve a better fit to the cleaning component 1, thereby enhancing the heating effect of the heating element 21 on the cleaning component 1.

[0122] Example 4:

[0123] The structural difference between this embodiment four and embodiment one lies in the construction of the upper and lower shells.

[0124] The floor brush in this fourth embodiment includes an upper housing 71 and a lower housing 72, as follows: Figure 13 As shown, the lower housing 72 has an opening at the upper end, and the front part of the upper housing 71 is recessed to form a cavity 220. The upper housing 71 is fastened to the lower housing 72, and the cavity 220 is placed inside the lower housing. The rear wall of the cavity 220, together with the upper housing 71 and the lower housing 72, forms a receiving cavity 10 located on the rear side of the cavity 220. An electrical device such as a water pump, an electrolytic water module, or a motor is installed in the receiving cavity 10. The bottom of the upper housing 71 and the bottom of the lower housing 72 are fitted with a clearance. The water tank is placed inside the cavity 220, and the front end of the water tank extends forward to cover the cleaning component 1. The extension is formed on the lower surface of the water tank. The extension has a mounting cavity with an opening at the lower end. A guide post is provided on the top wall of the mounting cavity, and a spring is provided on the guide post. The heating component is positioned in the mounting cavity below the spring through a positioning bracket so that the heating component floats in the mounting cavity and ensures that the heating component and the bristles of the cleaning component are in close contact.

[0125] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0126] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0127] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A surface cleaning device, comprising a floor brush and a cleaning component rotatably mounted on the floor brush, the floor brush comprising a brush housing, a scraping component, a dispensing component, and a heating component, the scraping component abutting against the cleaning component to scrape the cleaning component, the dispensing component supplying cleaning liquid to the cleaning component, characterized in that, Along the rotation direction of the cleaning component, the scraping component is located upstream of the liquid dispensing component, the heating component is located downstream of the liquid dispensing component, and there is an immersion gap between the liquid dispensing component and the heating component. The heating component is floating relative to the floor brush housing so that the outer surface of the heating component is in contact with the cleaning component for heating the cleaning component and the cleaning liquid on the cleaning component.

2. The surface cleaning device according to claim 1, characterized in that, The floor brush housing includes an upper housing and a lower housing. The upper housing includes a main body and an extension. The main body and the lower housing cooperate to form a receiving cavity. The extension extends forward from the opening of the receiving cavity to cover the cleaning component. The heating component is floatingly disposed on the extension.

3. The surface cleaning device according to claim 2, characterized in that, The heating element is mounted on the extension via a positioning bracket, which extends toward the accommodating cavity.

4. The surface cleaning device according to claim 1, characterized in that, The floor brush housing includes an upper housing and a lower housing, the surface cleaning device includes a top cover that is detachably installed on the upper housing, and the heating element is floatingly installed on the top cover.

5. The surface cleaning device according to claim 1, characterized in that, The central angle of the immersion gap along the circumference of the cleaning component to the coverage area of ​​the cleaning component is α, and α satisfies: 5°≤α≤40°.

6. The surface cleaning device according to claim 2, characterized in that, The extension has a mounting cavity with the opening facing downwards. The heating element includes a heating element and an elastic element. The heating element is disposed in the mounting cavity. The elastic element is located between the heating element and the top wall of the mounting cavity and drives the heating element to float along the mounting cavity. The outer surface of the heating element is at least flush with the opening of the cavity so as to fit with the cleaning element.

7. The surface cleaning device according to claim 6, characterized in that, The extension protrudes outward in a direction away from the cleaning component and forms the mounting cavity on the inside. The length of the extension is less than the length of the main body. The extension has reinforcing arms on both sides of the mounting cavity, and the reinforcing arms extend toward the main body to the receiving cavity.

8. The surface cleaning device according to claim 7, characterized in that, The main body is provided with a bent flange between the accommodating cavity and the mounting cavity. The bent flange and the outer wall of the accommodating cavity cooperate to form a mounting groove for mounting the liquid dispensing component. One end of the extension is connected to the bent flange, and the other end extends upward to the top of the cleaning component. The mounting cavity is located on the side of the bent flange away from the accommodating cavity. The reinforcing arm passes through the bent flange and extends into the accommodating cavity.

9. The surface cleaning apparatus according to any one of claims 7 or 8, characterized in that, The floor brush housing is also provided with a wiring cavity that communicates with the mounting cavity. The wiring cavity is used to introduce the power cord of the heating element into the receiving cavity.

10. The surface cleaning device according to claim 2, characterized in that, The extension has a mounting groove. The heating element includes a heating element, an elastic element, and a pressure cap that is fastened to the upper port of the mounting groove. The heating element is disposed in the mounting groove. The elastic element is installed on the pressure cap and abuts against the heating element so that the heating element floats along the mounting groove. The outer surface of the heating element is at least flush with the lower opening of the mounting groove so as to at least partially fit the cleaning element.

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