Floor brush structure and cleaning equipment

Abstract

The utility model relates to a floor brush structure and cleaning equipment. The floor brush structure comprises a rolling brush, a spray head, a floor brush body, an air pump, a cleaning agent pump, a reversing valve and a mixer, wherein the rolling brush is rotatably mounted on the floor brush body; the nozzle is mounted on the floor brush body, and the reversing valve comprises a first passage and a second passage which are opened at different moments respectively; an inlet of the first channel communicates with the air pump and the cleaning agent pump, an outlet of the first channel communicates with the mixer, and the mixer can provide cleaning foam for the surface to be cleaned; the nozzle is communicated with the mixer to spray cleaning foam to the surface to be cleaned, an inlet of the second passage is at least communicated with the cleaning agent pump, and an outlet of the second passage is used for providing a cleaning agent for the rolling brush. According to the technical scheme, foam can be provided for the surface to be cleaned, the cleaning effect is improved, the space of the floor brush structure can be fully utilized, and foam utilization is more flexible.

Description

Technical Field

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

[0002] With the development of science and technology and the improvement of living standards, household cleaning equipment has become increasingly popular, reducing the burden of housework. Examples include robotic vacuum cleaners, floor scrubbers, and combined sweeping and mopping machines.

[0003] In related technologies, taking floor scrubbers as an example, floor scrubbers achieve cleaning through a roller brush at the bottom of the brush structure. During the cleaning process, the roller brush is usually wetted to perform wet cleaning on the surface to be cleaned. While wet cleaning can effectively improve the cleaning effect, due to the variety of dirt types, some oil stains or stubborn dirt are still difficult to remove. To improve this problem, a method of spraying foam onto the surface to be cleaned is currently used to enhance the cleaning effect. Specifically, a foam pump is installed on the floor scrubber to generate foam and deliver it to the surface to be cleaned. This foam pump integrates an air pump, a peristaltic pump, and a mixing chamber, resulting in a large volume and requiring a large installation space in the brush structure, leading to low space utilization of the brush structure. Moreover, this foam-generating structure also suffers from poor flexibility, high cost, and a poor user experience. Summary of the Invention

[0004] In view of the above problems, embodiments of this application provide a floor brush structure and cleaning device that can provide foam to the surface to be cleaned, improve the cleaning effect, make full use of the space of the floor brush structure, and make the use of foam more flexible.

[0005] To achieve the above objectives, the embodiments of this application provide the following technical solutions:

[0006] The first aspect of this application provides a floor brush structure, which includes: a roller brush, a floor brush body, an air pump, a cleaning agent pump, a reversing valve, and a mixer;

[0007] The roller brush is rotatably mounted on the floor brush body;

[0008] The reversing valve includes a first passage and a second passage that are switched on and off at different times.

[0009] The inlet of the first passage is connected to the air pump and the cleaning agent pump respectively, and the outlet of the first passage is connected to the mixer, which can provide cleaning foam to the surface to be cleaned;

[0010] The inlet of the second passage is in communication with at least the cleaning agent pump, and the outlet of the second passage is used to provide cleaning agent to the roller brush.

[0011] The air pump is used to pump air, and the detergent pump is used to pump detergent or detergent-containing liquid. If the air pump and detergent pump operate simultaneously, the fluid flowing through the reversing valve is an air-liquid mixture. The mixer is used to generate more stable and denser bubbles from the air-liquid mixture, so that these bubbles can remain for a longer time after being sprayed onto the surface to be cleaned, improving the visibility and cleaning effect.

[0012] Unlike existing integrated bubble pumps that combine an air pump, peristaltic pump, and mixing chamber, the embodiments of this application use an air pump, detergent pump, reversing valve, and mixer to generate foam. These components are independent and can be placed separately according to the spatial layout of the floor brush structure, eliminating the need to reserve a whole block of space. This fully utilizes the fragmented space of the floor brush structure, increases the tolerance of the internal component layout, and also helps to reduce costs. Furthermore, the independence of each component allows for individual control, making the structural layout and bubble utilization more flexible and adjustable.

[0013] Optionally, the floor brush structure further includes: a first transmission pipe, a second transmission pipe, and a third transmission pipe;

[0014] The two ends of the first transmission tube are respectively connected to the air pump and one end of the third transmission tube;

[0015] The two ends of the second transmission tube are respectively connected to the cleaning agent pump and one end of the third transmission tube;

[0016] The other end of the third transmission tube is connected to the entrance of the first path, and the entrance of the first path coincides with the entrance of the second path.

[0017] Optionally, the second passage is connected to both the air pump and the detergent pump, and the second passage is used to supply the roller brush with a detergent in an air-liquid mixture; or,

[0018] The second passage is connected to the cleaning agent pump and is used to supply liquid cleaning agent to the roller brush.

[0019] Optionally, the floor brush structure further includes:

[0020] Clean water pump;

[0021] A detergent tank for storing detergent and connected to the detergent pump;

[0022] A clean water tank, used at least for storing clean water, and connected to the clean water pump;

[0023] A homogenizer, the inlet of which is connected to the outlet of the second passage and the water pump, to mix the cleaning agent and the water evenly;

[0024] A water distributor, connected to the equalizer, provides cleaning agent to the roller brush.

[0025] Optionally, the equalizer includes a three-way valve, with two inlets of the three-way valve connected to the outlet of the second passage and the clean water pump, respectively, and one outlet of the three-way valve connected to the water distributor.

[0026] Optionally, the floor brush structure further includes a nozzle mounted on the floor brush body, the nozzle being in communication with the mixer to spray the cleaning foam onto the surface to be cleaned.

[0027] Optionally, the nozzle includes an upper pipe section and a lower pipe section, the upper pipe section forming the inlet of the nozzle, the lower pipe section forming the outlet of the nozzle, and the inner diameter of the lower pipe section gradually increasing along the foam ejection direction.

[0028] Optionally, the nozzle further includes a transition section, the inner wall of which smoothly transitions with the inner wall of the upper pipe section and the inner wall of the lower pipe section, and the inner diameter of the transition section gradually decreases along the foam ejection direction.

[0029] Optionally, the inner wall of the transition section extends along an ellipsoidal trajectory; the longitudinal section of the lower pipe section is fan-shaped, wherein the longitudinal section is a section parallel to the axial direction of the nozzle.

[0030] Optionally, the maximum inner diameter of the lower pipe section is less than or equal to the maximum inner diameter of the upper pipe section.

[0031] Optionally, the maximum inner diameter of the lower pipe section is 1.8mm-2.0mm, and the inner diameter of the upper pipe section is less than or equal to 2.0mm.

[0032] Optionally, the mixer includes: an inner cavity, a filter screen located in the inner cavity, and a mixture inlet and a foam outlet, both of which are in communication with the inner cavity. The mixture inlet is in communication with the outlet of the first passage, and the foam outlet is in communication with the inlet of the nozzle.

[0033] Optionally, the mixture inlet and the foam outlet are located on opposite sides of the inner cavity, and the mixture inlet and the foam outlet are coaxial.

[0034] Optionally, the mixer is an integral structure, or the mixer is a split structure, the mixer includes a first cavity and a second cavity, the first cavity and the second cavity are spliced ​​together to form the inner cavity, and the filter is sandwiched between the first cavity and the second cavity.

[0035] A second aspect of this application provides a floor brush structure, which includes: a roller brush, a nozzle, a floor brush body, an air pump, a cleaning agent pump, a reversing valve, and a mixer;

[0036] The roller brush is rotatably mounted on the floor brush body;

[0037] The nozzle is mounted on the floor brush body;

[0038] The reversing valve includes a first passage that can be switched on and off.

[0039] The inlet of the first passage is connected to the air pump and the cleaning agent pump respectively, and the outlet of the first passage is connected to the mixer. The mixer is capable of providing cleaning foam to the surface to be cleaned, and the nozzle is connected to the mixer to spray the cleaning foam onto the surface to be cleaned.

[0040] The nozzle includes an upper pipe section and a lower pipe section that are interconnected, one end of the upper pipe section is connected to the outlet of the mixer, and the other end of the upper pipe section is connected to one end of the lower pipe section;

[0041] The nozzle has a slot that extends from the other end of the lower pipe section into the upper pipe section along the axial direction of the nozzle, and penetrates the side wall of the nozzle along the radial direction of the nozzle.

[0042] The inner wall of the lower pipe section extends along a spherical or ellipsoidal trajectory.

[0043] Optionally, the width of the slot is 0.15-0.25mm, preferably 0.2mm, the length of the slot extending into the upper pipe section is 1.5-3.0mm, preferably 2.2mm, and the inner diameter of the upper pipe section is 2.3-2.7mm, preferably 2.5mm.

[0044] Optionally, the nozzle is movably mounted on the floor brush body, and the angle between the nozzle outlet and the surface to be cleaned changes synchronously with the movement of the nozzle.

[0045] A third aspect of this application provides a floor brush structure, which includes: a roller brush, a nozzle, a floor brush body, an air pump, a cleaning agent pump, a reversing valve, and a mixer;

[0046] The roller brush is rotatably mounted on the floor brush body;

[0047] The nozzle is mounted on the floor brush body;

[0048] The reversing valve includes a first passage that can be switched on and off.

[0049] The inlet of the first passage is connected to the air pump and the cleaning agent pump respectively, and the outlet of the first passage is connected to the mixer. The mixer is capable of providing cleaning foam to the surface to be cleaned, and the nozzle is connected to the mixer to spray the cleaning foam onto the surface to be cleaned.

[0050] The nozzle is movably mounted on the floor brush body, and the angle between the nozzle's outlet center axis and the surface to be cleaned changes synchronously with the movement of the nozzle.

[0051] Optionally, the angle between the outlet center axis of the nozzle and the surface to be cleaned is 0-60°.

[0052] Optionally, the nozzle includes: an upper pipe section and a lower pipe section that are connected to each other, one end of the upper pipe section being connected to the outlet of the mixer, and the other end of the upper pipe section being connected to one end of the lower pipe section;

[0053] The nozzle has a slot that extends from the other end of the lower pipe section into the upper pipe section along the axial direction of the nozzle, and penetrates the side wall of the nozzle along the radial direction of the nozzle; the inner wall of the lower pipe section extends along a spherical or ellipsoidal trajectory.

[0054] The width of the groove is 0.15-0.25mm, the length of the groove extending into the upper pipe section is 1.5-3.0mm, and the inner diameter of the upper pipe section is 2.3-2.7mm.

[0055] A fourth aspect of this application provides a cleaning device, the cleaning device comprising:

[0056] The floor brush structure, body assembly, suction device, and control board are provided. The body assembly is connected to the floor brush structure. The suction device is installed on the body assembly and is used to suction dirt from the roller brush. The control board is installed on the body assembly or the floor brush structure.

[0057] The floor brush structure includes: a roller brush, a nozzle, a floor brush body, an air pump, a cleaning agent pump, a reversing valve, and a mixer;

[0058] The roller brush is rotatably mounted on the floor brush body;

[0059] The nozzle is mounted on the floor brush body;

[0060] The reversing valve includes a first passage that can be switched on and off.

[0061] The inlet of the first passage is connected to the air pump and the cleaning agent pump respectively, and the outlet of the first passage is connected to the mixer. The mixer is capable of providing cleaning foam to the surface to be cleaned, and the nozzle is connected to the mixer to spray the cleaning foam onto the surface to be cleaned.

[0062] The control board is electrically connected to the air pump to control the power of the air pump; the control board is electrically connected to the detergent pump to control the power of the detergent pump; the control board is electrically connected to the reversing valve to control the switching of the first passage.

[0063] Optionally, the reversing valve further includes a second passage that can be switched on and off;

[0064] The inlet of the second passage is connected to at least the detergent pump, and the outlet of the second passage is used to supply detergent to the roller brush; the control panel can control the switching of the second passage via the reversing valve.

[0065] Optionally, the cleaning equipment has a foam washing mode, in which the air pump and the cleaning agent pump operate synchronously; the foam washing mode has at least two operating levels, including a first level and a second level, wherein the working power of the air pump and the cleaning agent pump in the first level is greater than the working power in the second level, so that the foam spraying distance of the nozzle in the first level is greater than the foam spraying distance in the second level.

[0066] Optionally, the body assembly is provided with a gear adjustment component, which is electrically connected to the control board and is used to switch between a first gear and a second gear.

[0067] Optionally, the cleaning device further includes:

[0068] A dirt detection module, which is electrically connected to the control board;

[0069] The dirt identification module is configured to identify and locate dirt on the surface to be cleaned, and output a dirt location signal to the control board; the control board is configured to output a channel designation signal to the reversing valve when triggered by the dirt location signal; the reversing valve is an electronically controlled steering valve, which is configured to open the first passage when triggered by the channel designation signal.

[0070] Optionally, the information in the dirt location signal includes a dirt distance level, the control board stores pre-pairing information between the operating mode and the dirt distance level, and the control board is configured to call the corresponding operating mode according to different dirt distance levels, so that the foam sprayed by the nozzle reaches the location of the dirt.

[0071] Optionally, the cleaning device further includes:

[0072] An obstacle detection module is electrically connected to the control board;

[0073] The obstacle detection module is configured to output a safety signal to the control board when it detects an obstacle in front of the cleaning equipment; the control board is configured to output a stop spray signal to the reversing valve when triggered by the safety signal; the reversing valve is an electronically controlled steering valve, which is configured to close the first passage when triggered by the stop spray signal.

[0074] Optionally, the nozzle is movably mounted on the floor brush body, and the angle between the nozzle's outlet center axis and the surface to be cleaned changes synchronously with the movement of the nozzle.

[0075] Optionally, the nozzle includes: an upper pipe section and a lower pipe section that are connected to each other, one end of the upper pipe section being connected to the outlet of the mixer, and the other end of the upper pipe section being connected to one end of the lower pipe section;

[0076] The nozzle has a slot that extends from the other end of the lower pipe section into the upper pipe section along the axial direction of the nozzle, and penetrates the side wall of the nozzle along the radial direction of the nozzle; the inner wall of the lower pipe section extends along a spherical or ellipsoidal trajectory.

[0077] The width of the groove is 0.15-0.25mm, the length of the groove extending into the upper pipe section is 1.5-3.0mm, and the inner diameter of the upper pipe section is 2.3-2.7mm.

[0078] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the floor brush structure and cleaning equipment provided by the embodiments of this application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific implementation. Attached Figure Description

[0079] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0080] Figure 1 A schematic diagram of the water channel layout of the floor brush structure in the cleaning equipment provided in some embodiments of this application;

[0081] Figure 2 A schematic diagram of the water channel layout of the floor brush structure in the cleaning equipment provided in other embodiments of this application;

[0082] Figure 3 This is a schematic diagram of the structure of the cleaning equipment in some embodiments of this application;

[0083] Figure 4 A longitudinal sectional view of the nozzle in a cleaning device provided in some embodiments of this application;

[0084] Figure 5 for Figure 4 A partial structural diagram of the central nozzle;

[0085] Figure 6 Another schematic diagram of the structure of the nozzle in the cleaning device provided in some embodiments of this application;

[0086] Figure 7 for Figure 6 Longitudinal sectional view of the central nozzle;

[0087] Figure 8 Another structural schematic diagram of the nozzle outlet in a cleaning device provided in some embodiments of this application;

[0088] Figure 9 A schematic diagram of the structure of the mixer in the cleaning equipment provided in some embodiments of this application;

[0089] Figure 10 for Figure 9 A cross-sectional view of the mixer;

[0090] Figure 11 for Figure 10 Schematic diagram of the filter structure of the medium mixer;

[0091] Figure 12 A cross-sectional view of a mixer with another structure in a cleaning device provided in some embodiments of this application.

[0092] Explanation of reference numerals in the attached figures:

[0093] 10. First transmission pipe; 20. Second transmission pipe; 30. Third transmission pipe; 40. Nozzle; 401. Nozzle inlet; 402. Nozzle outlet; 403. Groove; 41. Upper pipe section; 42. Lower pipe section; 43. Transition section; 50. Mixer; 501. First chamber; 502. Second chamber; 51. Mixed liquid inlet; 52. Foam outlet; 53. Inner cavity of mixer; 60. Filter screen; 100. Cleaning equipment; 110. Floor brush structure; 111. Roller brush; 112. Roller brush cover; 113. Base; 114. Floor brush body. Detailed Implementation

[0094] To make the technical solution and beneficial effects of this utility model more apparent and understandable, a detailed description is provided below by listing specific embodiments. The accompanying drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly show the details of the local features; unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical field to which this application pertains.

[0095] In the description of this utility model, the terms "longitudinal", "length", "width", "upper", "lower", "front", "rear", "bottom", "inner", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. That is, they should not be construed as limitations on this utility model.

[0096] In this invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating the relative importance of the indicated features or the number of indicated technical features. Therefore, a feature specified as "first," "second," or "third" explicitly includes at least one of those features. In the description of this invention, "a plurality of" means at least two, such as two, three, etc.

[0097] In this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "linking," "communication," and "setting," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also 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 utility model according to the specific circumstances.

[0098] like Figure 1 As shown in the figure, this application embodiment provides a floor brush structure, which includes: a roller brush, a nozzle, a floor brush body, an air pump, a detergent pump, a reversing valve, and a mixer; the roller brush is rotatably mounted on the floor brush body; the nozzle is mounted on the floor brush body; the reversing valve includes a first passage that can be switched on and off; the inlet of the first passage is connected to the air pump and the detergent pump respectively, and the outlet of the first passage is connected to the mixer, the mixer is capable of providing cleaning foam to the surface to be cleaned, and the nozzle is connected to the mixer to spray the cleaning foam onto the surface to be cleaned.

[0099] In some alternative embodiments, the reversing valve further includes a second passage that can be switched on and off; the inlet of the second passage is in communication with at least the detergent pump, and the outlet of the second passage is used to supply detergent to the roller brush.

[0100] In some alternative embodiments, the floor brush structure includes: a roller brush, a nozzle, a floor brush body, an air pump, a detergent pump, a reversing valve, and a mixer; wherein the roller brush is rotatably mounted on the floor brush body; the nozzle is mounted on the floor brush body; the reversing valve includes a first passage and a second passage that can be switched on and off; the inlet of the first passage is connected to the air pump and the detergent pump respectively, and the outlet of the first passage is connected to the mixer, which is capable of providing cleaning foam to the surface to be cleaned; the nozzle is connected to the mixer to spray cleaning foam onto the surface to be cleaned; the inlet of the second passage is at least connected to the detergent pump, and the outlet of the second passage is used to provide detergent to the roller brush.

[0101] In this embodiment, the air pump is used to pump air, and the detergent pump is used to pump detergent or detergent-containing liquid. If the air pump and detergent pump operate simultaneously, the fluid flowing through the reversing valve is a gas-liquid mixture. The mixer is used to generate more stable and denser bubbles from the gas-liquid mixture, so that the bubbles can remain for a longer time without breaking after being sprayed onto the surface to be cleaned, thereby improving the visibility and cleaning effect.

[0102] Unlike the integrated bubble pumps in the prior art that combine an air pump, a peristaltic pump, and a mixing chamber, in this embodiment, the air pump, detergent pump, reversing valve, and mixer work together to generate foam. These components are independent and can be placed separately according to the spatial layout of the floor brush structure, without the need to reserve a whole block of space. This makes full use of the fragmented space of the floor brush structure and also helps to reduce costs.

[0103] Furthermore, each component can be independently controlled. For example, the power of the detergent pump can be adjusted individually, allowing it to pump different flow rates of detergent as needed. Alternatively, the air pump can be controlled independently to adjust the air intake. Or, the opening of the diverting valve can be adjusted to different fluid flow rates in the first and second passages. Therefore, the floor brush structure in this embodiment offers greater flexibility and adjustability in its structural layout and air bubble utilization.

[0104] Two different operating modes can be achieved using the reversing valve. For ease of description, these two modes will be referred to as: foam cleaning mode, which sprays foam onto the surface to be cleaned, and roller brush mode, which sprays cleaning agent onto the roller brush. The surfaces to be cleaned include, but are not limited to, floors, carpets, or walls; the following description will use floors as an example. Spraying foam onto the floor softens the dirt before the roller brush reaches it, improving cleaning effectiveness. The cleaning agent flowing from the reversing valve to the roller brush can be used during the roller brush's floor cleaning process or during the roller brush's self-cleaning process within the base station. Therefore, the cleaning agent flowing to the roller brush improves both the floor cleaning effect and the self-cleaning effect of the roller brush.

[0105] In the foam washing mode, the first passage is open and the second passage is closed. Both the air pump and the detergent pump are connected to the first passage, and the reversing valve can deliver the gas-liquid mixture to the mixer. In the spray roller brush mode, the first passage is closed and the second passage is open, and the fluid flowing out of the reversing valve goes to the roller brush.

[0106] In the roller brush mode, the reversing valve can supply cleaning agent in different states to the roller brush depending on whether the air pump is connected to the second passage. In some optional embodiments, the second passage is connected to both the air pump and the cleaning agent pump, and the second passage is used to supply the roller brush with a gas-liquid mixture of cleaning agent; or, the second passage is connected to the cleaning agent pump but not to the air pump, and the second passage is used to supply the roller brush with liquid cleaning agent.

[0107] Whether the air pump is connected to the second passage can be controlled by starting or stopping the air pump or by controlling the valves in the passage. For example, in the spray roller brush mode, the air pump can be controlled to be off and the detergent pump to be on, so that no gas is mixed in with the fluid flowing through the reversing valve, thus providing the roller brush with liquid detergent. Alternatively, in the spray roller brush mode, both the air pump and the detergent pump can be controlled to be on, allowing gas to be mixed in with the fluid flowing through the reversing valve, thus providing the roller brush with foam detergent.

[0108] Without limitation, the directional valve can be a manually operated mechanical valve, allowing the user to manually open the first or second passage at different times. Alternatively, the directional valve can be an electrically controlled valve (such as a solenoid valve), which allows for automatic control of the first and second passages using electrical signals.

[0109] like Figure 2As shown, in some optional embodiments, the floor brush structure further includes: a first transmission pipe 10, a second transmission pipe 20, and a third transmission pipe 30; both ends of the first transmission pipe 10 are respectively connected to an air pump and one end of the third transmission pipe 30; both ends of the second transmission pipe 20 are respectively connected to a cleaning agent pump and one end of the third transmission pipe 30; the other end of the third transmission pipe 30 is connected to the inlet of the first passage, and the inlet of the first passage coincides with the inlet of the second passage.

[0110] The first transmission pipe 10 is used to transmit gas pumped by the air pump, and the second transmission pipe 20 is used to transmit liquid pumped by the cleaning agent pump. The gas and liquid are mixed in the third transmission pipe 30 before passing to the reversing valve. This method of initially mixing the gas and liquid before transferring them through the reversing valve helps to stabilize the flow state of the gas-liquid mixture in the pipeline and provides better controllability.

[0111] The first, second, and third transmission tubes can be either flexible or rigid tubes.

[0112] In some alternative embodiments, the third transmission pipe may not be provided, and the first and second transmission pipes may be connected to the reversing valve respectively.

[0113] In some alternative embodiments, such as Figure 1 and Figure 2 As shown, the floor brush structure also includes: a clean water pump, a detergent tank, a clean water reservoir, a mixer, and a water distributor. The detergent tank is used to store detergent and is connected to the detergent pump; the clean water reservoir is used to store at least clean water and is connected to the clean water pump; the inlet of the mixer is connected to the outlet of the second passage and the clean water pump respectively to mix the detergent and clean water evenly; the water distributor is connected to the mixer to provide detergent to the roller brush.

[0114] The reversing valve supplies detergent to the homogenizer through a second passage, while the clean water pump supplies clean water to the homogenizer. The clean water and detergent are mixed evenly in the homogenizer before being sprayed onto the roller brush via a distributor. This method allows for more precise flow control of the detergent and clean water separately, and the detergent and clean water are mixed more evenly, reducing detergent waste and extending the detergent's operating time.

[0115] The water distributor is a water distribution structure installed in the brush body. One end serves as the fluid inlet, and the other end has multiple spray nozzles. These nozzles are evenly distributed along the axial direction of the brush to wet the brush more evenly and comprehensively.

[0116] In the existing structure, the distributor has only one fluid inlet, and the homogenizer combines the detergent and clean water into one liquid stream, allowing for better matching with the distributor. It is understood that in some other embodiments, the distributor's fluid inlet can be changed to two, with the distributor connecting to the outlet of the second channel and the clean water pump outlet respectively. This eliminates the need for the homogenizer, and the distributor simultaneously performs both mixing and water distribution functions, further saving space in the brush structure.

[0117] In some alternative embodiments, the equalizer includes a tee with two inlets connected to the outlet of the second passage and the clean water pump, respectively, and one outlet of the tee connected to the water distributor.

[0118] The cleaning agent and water enter the inner cavity of the tee through the two inlets respectively, and are mixed by the impact of the fluid flow in the inner cavity of the tee.

[0119] In some alternative embodiments, such as Figures 3 to 8 As shown, the floor brush structure also includes a nozzle 40, which is mounted on the floor brush body and connected to a mixer to spray cleaning foam onto the surface to be cleaned. The nozzle 40 enables directional spraying of the foam. Furthermore, the nozzle 40 also provides pressurization, which helps to increase the spray area and distance of the bubbles.

[0120] The number of nozzles 40 can be one, two, three or more.

[0121] like Figure 3 As shown, the floor brush body 114 includes a base 113 mainly formed by a housing, and a roller brush cover 112 mounted on the base 113. The aforementioned roller brush 111, air pump, detergent pump, reversing valve, mixer, etc., can all be mounted on the base 113. The roller brush cover 112 covers the roller brush 111 to prevent the roller brush 111 from splashing dirt onto the ground during cleaning. The nozzle 40 can be mounted on the roller brush cover 112, or the nozzle can be mounted on the base 113.

[0122] The nozzle outlet faces forward of the floor brush structure so as to spray foam onto the ground in front of the floor brush structure.

[0123] In some alternative embodiments, such as Figure 4 and Figure 5 As shown, the nozzle 40 includes an upper pipe section 41 and a lower pipe section 42 that are interconnected. The upper pipe section 41 forms the nozzle inlet 401, and the lower pipe section 42 forms the nozzle outlet 42. The inner diameter of the lower pipe section 42 gradually increases along the foam spraying direction. The nozzle outlet 402, which gradually increases in size along the foam spraying direction, can effectively increase the foam coverage area. For example, the nozzle 40 can spray an approximately rectangular or elliptical foam coverage area, increasing the coverage area of ​​dirt on the ground and improving the visibility and actual cleaning effect.

[0124] For example, the longitudinal cross-sectional shape of this lower pipe section, which gradually increases in the direction of foam ejection, can be as follows: Figure 5 The aforementioned fan-shaped shape, wherein the longitudinal section is a section parallel to the axial direction of the nozzle.

[0125] In some alternative embodiments, such as Figure 4 and Figure 5 As shown, the nozzle 40 also includes a transition section 43, the inner wall of which smoothly transitions with the inner wall of the upper pipe section 41 and the inner wall of the lower pipe section 42, and the inner diameter of the transition section 43 gradually decreases along the foam spraying direction.

[0126] A smooth transition reduces fluid energy loss, minimizes defoaming, and ensures optimal spraying performance. From Figure 5 As can be seen, the inner diameter at the connection between the transition section 43 and the lower pipe section 42 is small, forming a constriction. The inner diameter of the lower pipe section gradually increases downward from the constriction. The fluid flows from the upper pipe section 41 through the location of the constriction and then enters the lower pipe section 42. This change in inner diameter can effectively increase the fluid velocity and ensure the foam spraying effect.

[0127] For example, such as Figure 5 As shown, the inner wall of transition section 43 extends along an ellipsoidal trajectory. That is, the inner wall of transition section 43 is approximately ellipsoidal. This shape can increase fluid velocity while reducing fluid energy loss, thereby improving foam spraying effect and the quality of the sprayed foam.

[0128] In some alternative embodiments, such as Figure 5 As shown, the maximum inner diameter of the lower pipe section 42 is less than or equal to the maximum inner diameter of the upper pipe section.

[0129] For example, the maximum inner diameter of the lower pipe section is 1.8mm-2.0mm, and the inner diameter of the upper pipe section is less than or equal to 2.0mm. For instance, the maximum inner diameter of the lower pipe section is 1.8mm, and the inner diameter of the upper pipe section is 2.0mm. Alternatively, the maximum inner diameter of the lower pipe section is 1.9mm, and the inner diameter of the upper pipe section is 2.0mm. Or, the maximum inner diameter of the lower pipe section is 2.0mm, and the inner diameter of the upper pipe section is 2.0mm. In the embodiment shown in this utility model, the upper pipe section is a cylindrical structure with the same inner diameter throughout. The inner diameter of the upper pipe section can also be 1.8mm, 1.9mm, 2.2mm, 2.3mm, or 2.5mm.

[0130] Figures 6 to 8 Another nozzle structure is also shown. For example... Figures 6 to 8As shown, in some alternative embodiments, the nozzle 40 includes: an upper pipe section 41 and a lower pipe section 42, one end of the upper pipe section 41 communicating with the outlet of the mixer, and the other end of the upper pipe section 41 communicating with one end of the lower pipe section 42; the nozzle 40 has a slot 403 extending from the other end of the lower pipe section into the upper pipe section 41 along the axial direction of the nozzle 40, and penetrating the sidewall of the nozzle 40 along the radial direction of the nozzle 40; the inner wall of the lower pipe section 42 is spherical ( Figure 8 (as shown) or ellipsoidal ( Figure 7 (As shown) Trajectory extension.

[0131] The nozzle outlet formed by the groove 403 can improve the foam spraying effect.

[0132] In some embodiments, the width of the slot 403 is 0.15-0.25 mm, the length of the slot 403 extending into the upper pipe section is 1.5-3.0 mm, and the inner diameter of the upper pipe section is 2.3-2.7 mm. For example, the width of the slot 403 is 0.15 mm, 0.2 mm, 0.22 mm, or 0.25 mm; the length of the slot 403 extending into the upper pipe section is 1.5 mm, 2.0 mm, 2.8 mm, or 3.0 mm; and the inner diameter of the upper pipe section is 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, or 2.7 mm.

[0133] In some embodiments, the width of the slot 403 is 0.2 mm, the length of the slot 403 extending into the upper pipe section is 1.5-3.0 mm, and the inner diameter of the upper pipe section is 2.5 mm. The width of the slot affects the uniformity of foam spraying and the coverage area. A nozzle that meets this condition can achieve a significantly increased atomization angle of over 20°, increasing the foam coverage area to an approximately rectangular foam region of over 100 mm in length and 50 mm in width. At the same time, the uniformity of foam particle size is also improved by more than 30%, and the dense and uniform foam can be maintained for more than 30 minutes, resulting in excellent visibility and actual cleaning effects.

[0134] In some alternative embodiments, such as Figures 9 to 12 As shown, the mixer 50 includes: an inner cavity 53, a filter 60 located in the inner cavity 53, and a mixture inlet 51 and a foam outlet 52, both of which are connected to the inner cavity 53. The mixture inlet 51 is connected to the outlet of the first passage, and the foam outlet 52 is connected to the inlet 401 of the nozzle 40.

[0135] like Figure 10 and Figure 12 As shown, the filter 60 divides the inner cavity 53 of the mixer 50 into two parts: one part is connected to the liquid inlet, and the other part is connected to the foam outlet. After the filter 60 separates the gas-liquid mixture from the diverting valve, it forms a dense and stable foam that is sprayed onto the ground.

[0136] The mesh size of the filter can be selected according to the flow rate of the detergent pump and air pump to obtain a dense and uniform foaming effect.

[0137] After testing and verification, the cleaning efficiency of the floor brush structure and the self-cleaning effect of the roller brush in this application embodiment are significantly improved for various stubborn stains or heavy oil stains.

[0138] In some alternative embodiments, such as Figure 10 and Figure 12 As shown, the mixture inlet 51 and the foam outlet 52 are located on opposite sides of the inner cavity 53, and the mixture inlet 51 and the foam outlet 52 are coaxial. This structure makes the fluid flow path inside the cavity approximately straight, reducing fluid energy loss.

[0139] by Figure 10 and Figure 12 For example, "coaxial" means that the centerline of the mixture inlet 51 and the centerline of the foam outlet 52 both coincide with the same straight line O. Furthermore, the inner cavity 53 is also coaxial with the mixture inlet 51 and the foam outlet 52.

[0140] In some alternative embodiments, the mixer is Figure 10 The monolithic structure shown, or the mixer, is Figure 12 The mixer 50, as shown in the diagram, has a split structure. It includes a first chamber 501 and a second chamber 502, which are joined together to form an inner cavity 53. The filter 60 is held between the first chamber 501 and the second chamber 502. The split structure of the mixer makes it easier to manufacture and also facilitates the replacement and installation of the filter.

[0141] In some alternative embodiments, the nozzle is movably mounted on the brush body, and the angle between the nozzle's outlet center axis and the surface to be cleaned changes synchronously with the movement of the nozzle.

[0142] Unrestricted movement includes rotation and / or linear movement. For example, the nozzle can rotate up and down; when the nozzle rotates upward, the nozzle outlet is raised, and the sprayed foam travels a greater distance; when the nozzle rotates downward, the nozzle outlet position is lower, and the sprayed foam is closer to the leading edge of the floor brush structure. In foam washing mode, the nozzle can be controlled to rotate while spraying foam, thus obtaining a larger foam area, or spraying multiple dirt areas in different locations as needed. It is understood that raising the nozzle outlet can also be achieved through upward linear movement of the nozzle, and lowering the nozzle outlet can be achieved through downward linear movement of the nozzle.

[0143] For example, a separate rotating device can be provided on the brush body to achieve the rotation of the nozzle. Alternatively, a separate linear motion device can be provided on the brush body to achieve the movement of the nozzle. Here, the rotating device includes, but is not limited to, a rotary motor and a transmission assembly. The transmission assembly is connected to the output shaft of the rotary motor and the nozzle, respectively, and transmits the rotational driving force of the rotary motor to the nozzle to drive the nozzle to rotate. The linear motion device includes a drive assembly and a traction member. The traction member is connected to the output shaft of the drive assembly and the nozzle, respectively. The output shaft of the drive assembly can achieve the linear reciprocating motion of the nozzle by winding or releasing the traction member. Here, the drive assembly includes at least a motor.

[0144] As another example, there is no need to set up a separate rotating device to realize the movement of the nozzle; the movement of the nozzle can be realized by utilizing the original movement device of the floor brush structure. For example, in some floor brush structures, the roller brush cover can move relative to the roller brush. When the roller brush cover moves to contact the roller brush, the rolling of the roller brush can clean the dirt on the inner wall of the roller brush cover. In this structure, the roller brush cover can be connected to the nozzle, and the movement of the roller brush cover can drive the movement of the nozzle.

[0145] In some alternative embodiments, the angle between the nozzle's outlet center axis and the surface to be cleaned is 0-60°. For example, the angle between the nozzle's outlet center axis and the surface to be cleaned is 10°, 20°, 30°, 40°, 45°, 50°, or 60°.

[0146] This application also provides a cleaning device, such as... Figure 3 As shown, the cleaning device 100 includes: the floor brush structure 110, the body assembly 120, and the suction device as described in any of the preceding embodiments. The body assembly is connected to the floor brush structure 110, and the suction device is installed on the body assembly 120 for sucking up dirt from the roller brush.

[0147] In some alternative embodiments, the cleaning device includes: a floor brush structure, a body assembly, a suction device, and a control board. The body assembly is connected to the floor brush structure, the suction device is mounted on the body assembly and is used to suction dirt from the roller brush area, and the control board is mounted on the body assembly or the floor brush structure. The floor brush structure includes: a roller brush, a nozzle, a floor brush body, an air pump, a cleaning agent pump, a reversing valve, and a mixer. The roller brush is rotatably mounted on the floor brush body. The nozzle is mounted on the floor brush body. The reversing valve includes a switchable valve. A first control path is provided; the inlet of the first path is connected to the air pump and the cleaning agent pump respectively, and the outlet of the first path is connected to the mixer, the mixer being able to provide cleaning foam to the surface to be cleaned; the nozzle is connected to the mixer to spray the cleaning foam onto the surface to be cleaned; the control board is electrically connected to the air pump to control the power of the air pump; the control board is electrically connected to the cleaning agent pump to control the power of the cleaning agent pump; the control board is electrically connected to the reversing valve to control the switching of the first path.

[0148] In this embodiment, the cleaning equipment includes, but is not limited to, floor scrubbers or electric mops.

[0149] The suction device includes a vacuum pump to provide suction to remove dirt from the ground.

[0150] Taking a floor scrubber as an example, the machine body also has a wastewater tank, where the dirt sucked up by the suction device is collected. For ease of operation, a handle is also provided on the machine body.

[0151] In some alternative embodiments, the cleaning device further includes: a control board mounted on the body assembly or the floor brush structure; the control board is electrically connected to an air pump to control the start and stop of the air pump; the control board is electrically connected to a cleaning agent pump to control the start and stop of the cleaning agent pump; and the control board is electrically connected to a reversing valve to control the start and stop of the first passage and the second passage, respectively.

[0152] By electrically connecting the control panel to the air pump, detergent pump, and reversing valve, each component can be flexibly controlled to meet the needs of different application scenarios. For example, when a user needs to clean specific stains on the floor, they can select the foam cleaning mode via buttons. In this case, the control panel activates the detergent pump, and the reversing valve opens to switch the targeted spray path. The cleaning solution is released to the floor through the detergent pump, reversing valve, mixer, and nozzle. When a user needs to clean the entire house with cleaning solution, they can select the roller brush spray mode via buttons. In this case, the control panel activates the detergent pump, and the reversing valve opens to switch the roller brush spray path. The cleaning solution is released to the roller brush through the detergent pump, reversing valve, uniform mixer (T-junction), and distributor.

[0153] The control panel executes corresponding control operations based on the received instructions. These instructions can be obtained not only from the buttons on the machine body but also from electronic devices such as mobile phones and computers that can communicate with the cleaning equipment. For example, the user inputs instructions through an application (APP) on their mobile phone, and the phone sends the corresponding instructions to the cleaning equipment.

[0154] Taking the control of the air pump as an example, after the control panel turns the air pump on, the air pump can deliver gas to the first or second passage of the reversing valve. After the control panel turns the air pump off (also known as stopping), the passage connected to the air pump is closed, and no more gas enters the reversing valve. The control panel's control over the start and stop of the detergent pump and the reversing valve is similar and will not be described in detail.

[0155] In some embodiments, the control panel may also control at least one of the following: the operating parameters of the air pump, the operating parameters of the detergent pump, and the opening degree of the reversing valve.

[0156] Operating parameters include, but are not limited to, the power of the corresponding pump and the motor speed of the corresponding pump. By controlling these operating parameters, different fluid flow rates can be achieved. By controlling the opening degree of the directional valve, the fluid outflow rate of the directional valve can be adjusted.

[0157] The control board can be the main control board of the cleaning equipment or other circuit control boards besides the main control board.

[0158] In some optional embodiments, the cleaning device has a foam washing mode in which the air pump and the detergent pump operate synchronously. The foam washing mode has at least two operating levels, including a first level and a second level. The operating power of the air pump and the detergent pump in the first level is greater than that in the second level, so that the foam spraying distance of the nozzle in the first level is greater than that in the second level.

[0159] In this way, the appropriate setting can be selected based on the distance between the dirt and the cleaning equipment, allowing the foam to be sprayed more accurately onto the dirt. Alternatively, at a certain location, the first and second settings can be controlled separately to spray foam at different distances in front of the cleaning equipment, thus expanding the foam spraying range.

[0160] For example, the foam spraying distance in the first setting can be 20-50cm, such as 20cm, 25cm, 30cm, 40cm or 50cm.

[0161] For example, foam spraying distance can refer to the straight-line distance between the furthest point of foam sprayed onto the ground along the direction of travel and the front edge of the floor brush structure. The meaning of foam spraying distance can be adjusted according to different cleaning equipment structures or different needs, and is not limited to this.

[0162] In some alternative embodiments, the body assembly is provided with a gear shifter that is electrically connected to the control board and is used to switch between a first gear and a second gear.

[0163] The gear adjustment component is used to receive user commands and send gear information to the control board according to the user commands. The control board controls the power of the air pump and detergent pump according to the gear information to achieve different foam spray distances.

[0164] For example, the gear adjustment component can be a physical adjustment key set on the body assembly, such as a button, knob, or toggle key. The gear adjustment component can also be a virtual key set on the body assembly, which can be used to adjust the gear through clicking, sliding, or other operations.

[0165] In some optional embodiments, the cleaning device further includes: a dirt identification module electrically connected to a control board; the dirt identification module is configured to identify and locate dirt on the surface to be cleaned and output a dirt location signal to the control board; the control board is configured to output a channel designation signal to a reversing valve when triggered by the dirt location signal; the reversing valve is an electrically controlled directional valve configured to open a first passage when triggered by the channel designation signal.

[0166] Without limitation, if the dirt detection module does not detect dirt, the control board controls the reversing valve to open the second passage. In other words, when the floor is relatively clean, foam is not sprayed, which helps to save cleaning agents and energy consumption, and increases the service life of cleaning agents and cleaning equipment energy storage modules (such as batteries).

[0167] In some applications, the dirt recognition module can automatically trigger foam spraying by identifying dirt, making the cleaning equipment smarter and improving the cleaning effect and user experience.

[0168] In other application scenarios, the dirt detection module can detect dirt on the ground in a timely manner. This dirt is located in the area that is about to be cleaned. Detecting the dirt in advance and spraying foam can soften the dirt in a timely and effective manner, so that the roller brush can improve the cleaning effect of the dirt when cleaning this area later.

[0169] The dirt detection module includes, but is not limited to, visual sensors or infrared sensors.

[0170] In some alternative embodiments, the information in the dirt location signal includes a dirt distance level. The control board stores pre-pairing information between the operating mode and the dirt distance level. The control board is configured to call the corresponding operating mode according to different dirt distance levels, so that the foam sprayed from the nozzle reaches the location of the dirt.

[0171] For example, taking the first setting as an example. If the dirt distance level is level one, and the pre-pairing information shows level one corresponding to the first setting, the control board will activate the first setting, and the nozzle will spray foam at the distance corresponding to that setting. Through the electrical connection between the control board and the dirt recognition module, the control board can accurately control the foam spray distance based on the dirt distance level, achieving precise spraying of dirt. Utilizing the electrical connection between the control board and the dirt recognition module can enrich the usage scenarios of cleaning equipment and improve the user experience.

[0172] In some alternative embodiments, the cleaning device further includes: an obstacle detection module electrically connected to the control board; the obstacle detection module is configured to output a safety signal to the control board when it detects an obstacle in front of the cleaning device; the control board is configured to output a stop spray signal to the reversing valve when triggered by the safety signal; the reversing valve is an electronically controlled steering valve, which is configured to close the first passage when triggered by the stop spray signal.

[0173] The obstacle detection module may include visual sensors, as well as distance sensors such as infrared sensors and lidar, but is not limited to these.

[0174] Obstacles include, but are not limited to, doors, tables, chairs, and sofas. Utilizing the electrical connection between the obstacle detection module and the control board helps prevent foam from being sprayed onto obstacles, thus avoiding contamination and reducing cleaning agent waste.

[0175] In some application scenarios, after the obstacle detection module detects an obstacle, if the nozzle is spraying foam at that time, it will control the nozzle to stop spraying foam.

[0176] In other application scenarios, the avoidance signal includes the distance to the obstacle. If the distance to the obstacle is less than or equal to a preset threshold, the first path is closed; if the distance to the obstacle is greater than the preset threshold, the first path is opened, and the distance from which the nozzle sprays foam is reduced to less than the distance to the obstacle to avoid spraying foam onto the obstacle. Once the obstacle detection module detects that the distance to the obstacle is greater than the preset threshold again (indicating that the cleaning equipment has moved away from the obstacle), the distance from which the nozzle sprays foam is restored. This effectively avoids foam contamination of obstacles and also ensures that foam is sprayed onto dirt closer to the obstacle (where dirt is usually more concentrated), improving cleaning efficiency.

[0177] For example, the distance to an obstacle refers to the distance between the obstacle and the front edge of the cleaning equipment, or the distance between the obstacle and a specific component such as the nozzle or obstacle detection module. However, it is not limited to these.

[0178] For example, the preset threshold can refer to the shortest distance that the cleaning device can spray. For instance, it can be any value such as 5cm, 10cm, or 20cm, or a range between any two values.

[0179] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0180] In the description of this specification, references to "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an 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 may be combined in any suitable manner in one or more embodiments or examples.

[0181] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A floor brush structure, characterized in that, The floor brush structure includes: a roller brush, a nozzle, a floor brush body, an air pump, a cleaning agent pump, a reversing valve, and a mixer; The roller brush is rotatably mounted on the floor brush body; The nozzle is mounted on the floor brush body; The reversing valve includes a first passage that can be switched on and off. The inlet of the first passage is connected to the air pump and the cleaning agent pump respectively, and the outlet of the first passage is connected to the mixer. The mixer is capable of providing cleaning foam to the surface to be cleaned, and the nozzle is connected to the mixer to spray the cleaning foam onto the surface to be cleaned. The nozzle includes an upper pipe section and a lower pipe section that are interconnected. The upper pipe section forms the inlet of the nozzle, and the lower pipe section forms the outlet of the nozzle. The inner diameter of the lower pipe section gradually increases along the direction of foam ejection.

2. The floor brush structure according to claim 1, characterized in that, The nozzle further includes a transition section, the inner wall of which smoothly transitions with the inner wall of the upper pipe section and the inner wall of the lower pipe section, and the inner diameter of the transition section gradually decreases along the foam ejection direction.

3. The floor brush structure according to claim 2, characterized in that, The inner wall of the transition section extends along an ellipsoidal trajectory; the longitudinal section of the lower pipe section is fan-shaped, wherein the longitudinal section is parallel to the axial direction of the nozzle.

4. The floor brush structure according to claim 1, characterized in that, The maximum inner diameter of the lower pipe section is less than or equal to the maximum inner diameter of the upper pipe section.

5. The floor brush structure according to claim 1, characterized in that, The maximum inner diameter of the lower pipe section is 1.8mm-2.0mm, and the inner diameter of the upper pipe section is less than or equal to 2.0mm.

6. The floor brush structure according to claim 1, characterized in that, The reversing valve also includes a second passage that can be switched on and off; the inlet of the second passage is at least connected to the detergent pump, and the outlet of the second passage is used to supply detergent to the roller brush.

7. The floor brush structure according to claim 6, characterized in that, The floor brush structure also includes: Clean water pump; A detergent tank for storing detergent and connected to the detergent pump; A clean water tank, used at least for storing clean water, and connected to the clean water pump; A homogenizer, the inlet of which is connected to the outlet of the second passage and the water pump, to mix the cleaning agent and the water evenly; A water distributor is used to supply cleaning agent to the roller brush; The equalizer includes a three-way valve, with two inlets connected to the outlet of the second passage and the clean water pump, respectively, and one outlet connected to the water distributor.

8. The floor brush structure according to claim 1, characterized in that, The mixer includes: an inner cavity, a filter screen located in the inner cavity, and a mixture inlet and a foam outlet, both of which are connected to the inner cavity. The mixture inlet is connected to the outlet of the first passage, and the foam outlet is connected to the inlet of the nozzle. The mixture inlet and the foam outlet are located on opposite sides of the inner cavity, and the mixture inlet and the foam outlet are coaxial.

9. The floor brush structure according to claim 8, characterized in that, The mixer is either an integral structure or a split structure, comprising a first cavity and a second cavity, wherein the first cavity and the second cavity are joined together to form the inner cavity, and the filter is held between the first cavity and the second cavity.

10. A floor brush structure, characterized in that, The floor brush structure includes: a roller brush, a nozzle, a floor brush body, an air pump, a cleaning agent pump, a reversing valve, and a mixer; The roller brush is rotatably mounted on the floor brush body; The nozzle is mounted on the floor brush body; The reversing valve includes a first passage that can be switched on and off. The inlet of the first passage is connected to the air pump and the cleaning agent pump respectively, and the outlet of the first passage is connected to the mixer. The mixer is capable of providing cleaning foam to the surface to be cleaned, and the nozzle is connected to the mixer to spray the cleaning foam onto the surface to be cleaned. The nozzle includes an upper pipe section and a lower pipe section that are connected to each other. One end of the upper pipe section is connected to the outlet of the mixer, and the other end of the upper pipe section is connected to one end of the lower pipe section. The nozzle has a slot that extends from the other end of the lower pipe section into the upper pipe section along the axial direction of the nozzle, and penetrates the side wall of the nozzle along the radial direction of the nozzle. The inner wall of the lower pipe section extends along a spherical or ellipsoidal trajectory.

11. The floor brush structure according to claim 10, characterized in that, The width of the slot is 0.15-0.25mm, the length of the slot extending into the upper pipe section is 1.5-3.0mm, and the inner diameter of the upper pipe section is 2.3-2.7mm.

12. The floor brush structure according to claim 10, characterized in that, The nozzle is movably mounted on the floor brush body, and the angle between the nozzle's outlet center axis and the surface to be cleaned changes synchronously with the movement of the nozzle.

13. A floor brush structure, characterized in that, The floor brush structure includes: a roller brush, a nozzle, a floor brush body, an air pump, a cleaning agent pump, a reversing valve, and a mixer; The roller brush is rotatably mounted on the floor brush body; The nozzle is mounted on the floor brush body; The reversing valve includes a first passage that can be switched on and off. The inlet of the first passage is connected to the air pump and the cleaning agent pump respectively, and the outlet of the first passage is connected to the mixer. The mixer is capable of providing cleaning foam to the surface to be cleaned, and the nozzle is connected to the mixer to spray the cleaning foam onto the surface to be cleaned. The nozzle is movably mounted on the floor brush body, and the angle between the nozzle's outlet center axis and the surface to be cleaned changes synchronously with the movement of the nozzle.

14. The floor brush structure according to claim 13, characterized in that, The angle between the nozzle's outlet center axis and the surface to be cleaned is 0-60°.

15. The floor brush structure according to claim 13, characterized in that, The nozzle includes an upper pipe section and a lower pipe section that are connected to each other. One end of the upper pipe section is connected to the outlet of the mixer, and the other end of the upper pipe section is connected to one end of the lower pipe section. The nozzle has a slot that extends from the other end of the lower pipe section into the upper pipe section along the axial direction of the nozzle, and penetrates the side wall of the nozzle along the radial direction of the nozzle; the inner wall of the lower pipe section extends along a spherical or ellipsoidal trajectory. The width of the groove is 0.15-0.25mm, the length of the groove extending into the upper pipe section is 1.5-3.0mm, and the inner diameter of the upper pipe section is 2.3-2.7mm.

16. A cleaning device, characterized in that, The cleaning equipment includes: a floor brush structure, a body assembly, a suction device, and a control board, wherein the body assembly is connected to the floor brush structure; The floor brush structure includes: a roller brush, a nozzle, a floor brush body, an air pump, a cleaning agent pump, a reversing valve, and a mixer; the suction device is installed on the body assembly and is used to suction dirt from the roller brush; the control board is installed on the body assembly or the floor brush structure. The roller brush is rotatably mounted on the floor brush body; The nozzle is mounted on the floor brush body; The reversing valve includes a first passage that can be switched on and off. The inlet of the first passage is connected to the air pump and the cleaning agent pump respectively, and the outlet of the first passage is connected to the mixer. The mixer is capable of providing cleaning foam to the surface to be cleaned, and the nozzle is connected to the mixer to spray the cleaning foam onto the surface to be cleaned. The control board is electrically connected to the air pump to control the power of the air pump; the control board is electrically connected to the detergent pump to control the power of the detergent pump; the control board is electrically connected to the reversing valve to control the switching of the first passage.

17. The cleaning equipment according to claim 16, characterized in that, The reversing valve also includes a second passage that can be switched on and off. The inlet of the second passage is connected to at least the detergent pump, and the outlet of the second passage is used to supply detergent to the roller brush; the control panel can control the switching of the second passage via the reversing valve.

18. The cleaning equipment according to claim 16, characterized in that, The cleaning equipment has a foam washing mode, in which the air pump and the cleaning agent pump operate synchronously; the foam washing mode has at least two operating levels, including a first level and a second level, wherein the working power of the air pump and the cleaning agent pump in the first level is greater than the working power in the second level, so that the foam spraying distance of the nozzle in the first level is greater than the foam spraying distance in the second level.

19. The cleaning equipment according to claim 18, characterized in that, The body assembly is equipped with a gear adjustment component, which is electrically connected to the control board and is used to switch between the first gear and the second gear.

20. The cleaning equipment according to claim 18, characterized in that, The cleaning equipment also includes a dirt detection module; the dirt detection module is electrically connected to the control board. The dirt identification module is configured to identify and locate dirt on the surface to be cleaned, and output a dirt location signal to the control board; the control board is configured to output a channel designation signal to the reversing valve when triggered by the dirt location signal; the reversing valve is an electronically controlled steering valve, which is configured to open the first passage when triggered by the channel designation signal.

21. The cleaning equipment according to claim 20, characterized in that, The information in the dirt location signal includes the dirt distance level. The control board stores pre-pairing information between the operating mode and the dirt distance level. The control board is configured to call the corresponding operating mode according to different dirt distance levels, so that the foam sprayed by the nozzle reaches the location of the dirt.

22. The cleaning equipment according to claim 16, characterized in that, The cleaning equipment also includes: An obstacle detection module, which is electrically connected to the control board; The obstacle detection module is configured to output a safety signal to the control board when it detects an obstacle in front of the cleaning equipment; the control board is configured to output a stop spray signal to the reversing valve when triggered by the safety signal; the reversing valve is an electronically controlled steering valve, which is configured to close the first passage when triggered by the stop spray signal.

23. The cleaning equipment according to claim 16, characterized in that, The nozzle is movably mounted on the floor brush body, and the angle between the nozzle's outlet center axis and the surface to be cleaned changes synchronously with the movement of the nozzle.

24. The cleaning equipment according to claim 16, characterized in that, The nozzle includes an upper pipe section and a lower pipe section that are connected to each other. One end of the upper pipe section is connected to the outlet of the mixer, and the other end of the upper pipe section is connected to one end of the lower pipe section. The nozzle has a slot that extends from the other end of the lower pipe section into the upper pipe section along the axial direction of the nozzle, and penetrates the side wall of the nozzle along the radial direction of the nozzle; the inner wall of the lower pipe section extends along a spherical or ellipsoidal trajectory. The width of the groove is 0.15-0.25mm, the length of the groove extending into the upper pipe section is 1.5-3.0mm, and the inner diameter of the upper pipe section is 2.3-2.7mm.

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