Floor brush structure and cleaning device

Abstract

The utility model discloses a floor brush structure and cleaning equipment, floor brush structure includes floor brush body and pressure relief subassembly. Floor brush body includes the casing and sets up water tank subassembly in the casing, and the casing is formed with suction port and air outlet, and the air outlet is used to be connected with negative pressure generating device, and the casing is formed with air duct, and the air duct is communicated suction port and air outlet and flows through water tank subassembly inside, pressure relief subassembly is located on floor brush body, and pressure relief subassembly includes valve seat, valve core and elastic element, and the valve seat is formed with the pressure relief channel of the communication outside and air duct, and valve core is used to open or block pressure relief channel, and elastic element applies pre -tightening force to valve core, when the negative pressure value in air duct is less than or equal to pressure value, and valve core and valve seat seal contact, and block pressure relief channel, when the negative pressure value in air duct is higher than pressure value, and valve core overcomes pre -tightening force and removes, and opens pressure relief channel, and wherein, pressure value is decided by pre -tightening force. The utility model avoids the water gas separation failure and host water problem caused by the too big suction.

Description

Technical Field

[0001] This utility model belongs to the field of cleaning equipment technology, specifically relating to a floor brush structure and cleaning equipment. Background Technology

[0002] Floor brushes are typically connected to negative pressure generating devices such as floor scrubbers to clean liquid and solid dirt from floors. They work by using suction generated by the vacuum cleaner or similar negative pressure generating device to draw a mixture of wastewater and air into the water tank assembly inside the floor brush. A water-air separation device (such as a filter or centrifugal structure) separates the clean air from the wastewater; the clean air is discharged, while the wastewater remains in the water tank assembly.

[0003] However, the effective execution of this water-air separation process strongly depends on a suitable suction range. Specifically, the suction power required to maintain effective water-air separation is typically less than 30 AW (Air Watt). If the suction power is too high (far greater than 30 AW), it will lead to:

[0004] Water-air separation failure: High-speed airflow will carry sewage droplets from the water tank assembly and directly penetrate the water-air separation device.

[0005] Damage to the negative pressure generating device: These sucked-in sewage droplets will enter the negative pressure generating device with the airflow, corroding core components such as precision motors and circuit boards, causing permanent damage.

[0006] Therefore, in order to address the above-mentioned technical problems, it is necessary to provide a floor brush structure and cleaning equipment. Utility Model Content

[0007] The purpose of this utility model is to provide a floor brush structure and cleaning equipment that can automatically release pressure when the negative pressure value in the air duct is too high.

[0008] To achieve the above objectives, the technical solution provided by a specific embodiment of this utility model is as follows:

[0009] A floor brush structure, the floor brush structure comprising:

[0010] The floor brush body includes a housing and a water tank assembly disposed within the housing. An air intake and an air outlet are formed on the housing. The air outlet is used to connect to a negative pressure generating device. An air duct is formed inside the housing, which connects the air intake and the air outlet and flows through the interior of the water tank assembly.

[0011] A pressure relief assembly is provided on the floor brush body, and the pressure relief assembly includes a valve seat, a valve core, and an elastic element;

[0012] The valve seat forms a pressure relief channel that connects to the outside world and the air duct;

[0013] The valve core is used to open or block the pressure relief channel;

[0014] The elastic element applies a preload force to the valve core;

[0015] When the negative pressure value in the air duct is less than or equal to the pressure value, the valve core and the valve seat are in sealing contact, blocking the pressure relief channel; when the negative pressure value in the air duct is higher than the pressure value, the valve core moves against the preload force, opening the pressure relief channel; wherein, the pressure value is determined by the preload force.

[0016] In one or more embodiments of the present invention, the pressure relief assembly is disposed on any chamber and / or pipe communicating with the air duct.

[0017] In one or more embodiments of the present invention, the air duct includes an air inlet section, a water tank section and an air outlet section connected in sequence. The air inlet section connects the water tank assembly and the air intake port. The water tank section is disposed inside the water tank assembly. The air outlet section connects the water tank assembly and the air outlet port.

[0018] In one or more embodiments of the present invention, the floor brush structure further includes a suction pipe located in the air inlet section and an air outlet structure located in the air outlet section, and the pressure relief component is in fluid communication with the air duct and is disposed on one or more of the suction pipe, the water tank assembly, the housing and the air outlet structure.

[0019] In one or more embodiments of this utility model, the pressure relief component is disposed near the air intake or air outlet.

[0020] In one or more embodiments of this utility model, the valve seat is fixedly installed on the housing and forms an installation cavity with the housing. The valve core and the elastic element are both disposed in the installation cavity. One end of the elastic element abuts against the valve core, and the other end abuts against the valve seat or the housing, so that the valve core has a tendency to move in the direction of blocking the pressure relief channel.

[0021] In one or more embodiments of this utility model, the housing is provided with a connection port connecting the air duct and the pressure relief channel, and the valve seat is provided with a pressure relief port connecting the pressure relief channel and the outside; when the valve core is closed, the pressure relief port is sealed, and the pressure relief channel is jointly formed by the pressure relief port, the mounting cavity and the connection port.

[0022] In one or more embodiments of this utility model, the valve seat is provided with a guide structure, and the valve core is slidably engaged with the guide structure; or,

[0023] The valve core is rotatably mounted to the valve seat via a rotating shaft.

[0024] In one or more embodiments of this utility model, the elastic element is a compression spring, a tension spring, a torsion spring, or a magnetic component that provides preload through magnetic force.

[0025] The technical solution provided by another specific embodiment of this utility model is as follows:

[0026] A cleaning device comprising a floor brush structure as described above.

[0027] Compared with existing technologies, the floor brush structure and cleaning equipment of this utility model automatically limit the negative pressure value in the air duct to a safe range through the pressure relief component, avoiding water-air separation failure and water ingress problems of the main unit caused by excessive suction of the negative pressure generating device in the cleaning equipment, thus effectively protecting the equipment. At the same time, elastic elements that can provide different pre-tightening forces can be selected to change the opening and closing threshold of the pressure relief component, so that a single floor brush can be adapted to main units with different suction forces or different cleaning scenarios. This utility model has a simple structure and low cost, adopts a purely mechanical structure, does not require a complex electronic control unit, has high reliability, low manufacturing cost, and is easy to promote. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a three-dimensional structural diagram of the floor brush structure in one embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of the front view of the floor brush structure in one embodiment of the present invention;

[0031] Figure 3 This is a cross-sectional view of the pressure relief component in one embodiment of the present invention;

[0032] Figure 4 for Figure 2 A cross-sectional view of point AA when the pressure relief channel is blocked.

[0033] Figure 5 for Figure 4 Enlarged view of the local structure at point A;

[0034] Figure 6 for Figure 2 A cross-sectional view of point AA when the pressure relief channel is opened;

[0035] Figure 7 for Figure 6 Enlarged view of the local structure at point B.

[0036] Explanation of key figure labels:

[0037] 1 floor brush body;

[0038] 11. Shell;

[0039] 111 Intake port;

[0040] 112 Air outlet;

[0041] 113 Connection port;

[0042] 12. Water tank assembly;

[0043] 13. Sewage suction pipe;

[0044] 14. Vent structure;

[0045] 101 Air duct;

[0046] 2. Pressure relief assembly;

[0047] 201 Pressure relief channel;

[0048] 202 Installation cavity;

[0049] 21 Valve seat;

[0050] 211 Pressure relief port;

[0051] 22 Valve core;

[0052] 23. Elastic element. Detailed Implementation

[0053] To enable those skilled in the art to better understand the technical solutions in this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0054] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0055] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0056] The technical solution of this utility model will now be described with reference to the accompanying drawings.

[0057] The cleaning equipment in this embodiment mainly includes a floor brush structure. The cleaning equipment contains a negative pressure generating device (i.e., a suction motor) and a control system (including a control circuit board, etc.), and the floor brush structure is detachably connected to the negative pressure generating device. (Refer to...) Figure 1 , 2 As shown, the floor brush structure includes a brush body 1 and a pressure relief assembly 2. Through a mechanical automatic pressure relief structure, it effectively solves the problem of water-air separation failure caused by excessive suction in existing technologies. When the suction exceeds a safety threshold, the pressure relief assembly 2 automatically opens, introducing external air to reduce the negative pressure inside the air duct 101, limiting the suction power within a safe range, thereby preventing wastewater from entering the main unit and damaging precision components. This design uses a purely mechanical structure, without relying on electronic control, and has the advantages of fast response and high reliability. At the same time, it has a simple structure, low cost, and is easy to manufacture and maintain, and can be widely used in various wet cleaning equipment, significantly improving product safety and service life.

[0058] Specifically, refer to Figures 3-7 As shown, the floor brush body 1 in this embodiment mainly includes a streamlined shell 11 and a water tank assembly 12 fixedly installed inside the shell 11. The shell 11 is usually made of plastic, and its interior is divided into different functional areas by ribs and other structures. An air intake 111 and an air outlet 112 are formed on the shell 11. The air outlet 112 is used to connect to a negative pressure generating device. A complex air duct 101 is formed inside the shell 11. The air duct 101 connects the air intake 111 and the air outlet 112 and flows through the interior of the water tank assembly 12. The water tank assembly 12 collects and temporarily stores the inhaled wastewater.

[0059] The air duct 101 is configured to generate negative pressure inside it after the negative pressure generator is activated. This negative pressure drives outside air in through the air intake 111, carrying dirt from the ground through the air duct 101. Finally, the gas-liquid mixture containing dirt is transported to the water tank assembly 12 for solid-liquid separation.

[0060] Reference Figures 4-7 As shown, in order to prevent excessive negative pressure inside the floor brush structure, the floor brush structure in this application is equipped with a pressure relief component 2. The pressure relief component 2 is located on the floor brush body 1 and mainly includes a valve seat 21, a valve core 22 and an elastic element 23.

[0061] The valve seat 21 is fixedly installed on the housing 11 by means of snap-fit ​​or integral installation. A pressure relief channel 201 is machined inside the valve seat 21. One end of the pressure relief channel 201 communicates with the external atmosphere, and the other end communicates with the air duct 101 inside the floor brush. The valve core 22 is movably disposed within the valve seat 21 to open or close the pressure relief channel 201. An elastic element 23 is disposed within the valve seat 21, with its first end abutting against the back of the valve core 22 and its second end abutting against the outer wall of the housing 11. Thus, the elastic element 23 continuously applies a preload force F1 towards the pressure relief port 211 to the valve core 22. This preload force F1 causes the valve core 22 to be tightly pressed against the pressure relief port 211 under normal conditions to form a seal, thereby blocking the pressure relief channel 201.

[0062] The working principle of the cleaning device of this invention is as follows:

[0063] 1. Normal operating conditions (inhalation power ≤ 30AW):

[0064] When the negative pressure generator of the cleaning equipment operates within a safe power range (i.e., suction power less than or equal to 30AW), the aerodynamic force F2 generated by the negative pressure value f in the air duct 101 and acting on the valve core 22 is less than the preload force F1 of the elastic element 23. At this time, the valve core 22 maintains a sealed contact with the valve seat 21 under the action of the preload force, tightly blocking the pressure relief channel 201. A closed air duct 101 system is formed inside the floor brush, and all airflow enters from the air intake 111, ensuring normal dirt suction and water-air separation efficiency.

[0065] 2. Overload protection status (power absorption > 30AW):

[0066] When the suction power of the negative pressure generator of the cleaning equipment abnormally increases and exceeds 30AW due to various reasons (such as accidental opening of the high gear or main unit failure), the negative pressure value f in the air duct 101 increases sharply. When the resulting aerodynamic force F2 increases to a level sufficient to overcome the preload force F1 of the elastic element 23, the valve core 22 is pushed inward to rotate, thereby opening the pressure relief passage 201.

[0067] Once the pressure relief channel 201 is opened, outside air will rapidly flow into the air duct 101 under atmospheric pressure. This influx of additional air quickly increases the air pressure inside the air duct 101, thereby automatically limiting the effective suction power acting on the floor brush structure to a safe value (approximately 30 AW).

[0068] It should be noted that the above-mentioned threshold for inhalation power is 30AW. However, this application is not limited to this. In other embodiments, the threshold for the inhalation power of the negative pressure generating device in the cleaning equipment may be 20AW, 25AW, 35AW, or 40AW.

[0069] The floor brush structure, through the mechanical pressure relief component 2, can automatically maintain the air pressure inside the housing 11 within the normal atmospheric pressure range, fundamentally avoiding the risk of water entering the main unit due to excessive suction, thus improving the reliability and service life of the product. At the same time, since the entire pressure relief process is controlled by physical and mechanical principles (when F1 is less than F2, the pressure relief channel 201 is opened; when F1 is greater than or equal to F2, the pressure relief channel 201 is blocked), it is a purely mechanical response that does not rely on easily failing electronic sensors or circuits, resulting in rapid response and extremely high reliability.

[0070] It should be noted that the preload provided by the elastic element 23 in this embodiment is preset after calculation and testing during the product design phase. The magnitude of this preload directly determines the opening critical point of the pressure relief valve. Through precise calibration, it is made to correspond precisely to the critical threshold at which the negative pressure in the air duct 101 reaches the point of water-air separation failure (experimentally verified, this threshold typically appears at the negative pressure value corresponding to an intake power of approximately 30AW). This precise matching ensures the timeliness and accuracy of the pressure relief protection function.

[0071] Of course, it is understandable that in other embodiments, the preload threshold of the pressure relief assembly 2 can be flexibly adjusted by selecting elastic elements 23 of different specifications (such as different stiffness coefficients), thereby enabling the same floor brush platform to adapt to negative pressure generating devices with different suction power ranges. For example, for high-end high-suction models, elastic elements 23 with larger preload can be selected to increase their pressure relief threshold (preset pressure value); while for entry-level models, elastic elements 23 with smaller preload can be matched to reduce the pressure relief threshold (preset pressure value). This modular design concept not only extends the product platform's life cycle and reduces R&D costs, but also provides users with more targeted performance matching and improves the user experience.

[0072] In one or more embodiments of this application, the pressure relief assembly 2 can be flexibly installed on any chamber or pipe communicating with the air duct 101. The air duct 101 includes an air inlet section, a water tank section, and an air outlet section connected in sequence. The air inlet section connects the water tank assembly 12 and the air intake 111. The water tank is disposed inside the water tank assembly 12. The air outlet section connects the water tank assembly 12 and the air outlet 112. During operation, under the action of the negative pressure generating device, the airflow containing sewage and solid waste is drawn in from the air intake 111, first entering the air inlet section, then the water tank assembly, then the air outlet section, and finally flowing out of the floor brush structure.

[0073] Since the water tank assembly includes a water tank and internal filters such as screens, these filters can be installed in one or more locations within the water tank to separate solid waste. For example, a first screen is installed inside the water tank, and a second screen is installed at the connection between the water tank section and the air outlet section. The airflow carrying contaminants and water flows out of the air inlet section and into the water tank section. Due to inertia and gravity, the contaminants and water sink, with the contaminants being intercepted on the first screen and the water seeping from the first screen into the bottom of the water tank. Liquid water and most solids in the airflow remain in the water tank, achieving initial purification of the gas. Solid matter generally remains on the first screen, making it easy to clean. Subsequently, the initially purified humid air continues to flow through the second screen for secondary filtration. Because the pore size of the second screen is smaller than that of the first screen, it can trap some fine water mist, particles, and hair, thus initially reducing the humidity of the humid air. This design achieves efficient separation of gaseous, liquid, and solid pollutants through a two-stage separation process, ensuring that only clean air flows into the negative pressure generating device as much as possible, and preventing blockages and damage caused by sewage being drawn into the negative pressure generating device.

[0074] Reference Figures 4-7 As shown, specifically, the floor brush body 1 in this embodiment also includes a suction pipe 13 and an air outlet structure 14 disposed in the housing 11. The suction pipe 13 is located in the air inlet section, and the air outlet structure 14 is located in the air outlet section. In this embodiment, the suction pipe 13 guides the dirt generated during the cleaning process to the water tank assembly 12 for preliminary gas-liquid-solid separation. Subsequently, the gas after preliminary separation may still have a certain degree of humidity, so an air outlet structure 14 is provided in the air outlet section. In this way, the gas will also flow through the air outlet structure 14 located in the air outlet section before flowing through the negative pressure generating device. The air outlet structure 14 is preferably a moisture-absorbing component, such as a HEPA filter or other high-efficiency moisture-absorbing composite filter material. When air passes through, the moisture-absorbing component can efficiently adsorb residual aerosol water mist and vaporized water vapor, significantly reducing the humidity of the gas flowing out of the air outlet 112, thereby ensuring that the air finally entering the negative pressure generating device is fully dry and clean, and minimizing the risk of water vapor erosion, scaling, and the resulting performance degradation and damage to components.

[0075] The pressure relief component 2 can be in fluid communication with the air duct and is disposed on one or more of the air inlet section, water tank section, and air outlet section. That is, the pressure relief component 2 can be connected to the air duct 101 through a channel that allows free air flow. Specifically, the pressure relief component 2 can be disposed on the upper part of the water tank assembly 12 and fixedly connected to the wall of the water tank assembly 12 through the valve seat 21, so that the pressure relief channel 201 communicates with the internal space of the water tank assembly 12; it can also be disposed on the side of the suction pipe 13 and communicate with the inside of the suction pipe 13; it can also be disposed at the interface of the connecting hose connected to the cleaning equipment and connected to the connecting hose. The pressure relief component 2 can be disposed near the air intake 111 or near the air outlet 112, and the above schemes all fall within the protection scope of this application. For example, in this embodiment, the pressure relief component 2 is fixedly installed on the housing 11 and disposed near the air outlet 112. This layout flexibility allows the pressure relief component 2 to be matched and installed according to different product structures and space constraints, which not only ensures the reliability of the function, but also improves the adaptability of the product design. It should be noted that regardless of the arrangement method, the sealing of the installation site must be ensured to prevent pressure leakage from affecting normal operation. Additionally, different arrangements may require corresponding adjustments to the preload parameters of the elastic element 23 to ensure accurate response under various operating conditions.

[0076] This design embodies the modular design concept, allowing the same pressure relief component 2 to be adapted to multiple product platforms through different installation methods, greatly improving the versatility of parts and the economy of production.

[0077] In one or more embodiments of this application, the valve seat 21 is fixedly installed on the top outer wall of the housing 11 and forms an installation cavity 202 between the valve seat 21 and the housing 11. The valve core 22 and the elastic element 23 are both disposed in the installation cavity 202. One end of the elastic element 23 abuts against the valve core 22 and the other end abuts against the outer wall of the housing 11, so that the valve core 22 has a tendency to move in the direction of blocking the pressure relief channel 201.

[0078] Preferably, the end face of the valve seat 21 that contacts the housing 11 is provided with an annular sealing groove, in which an O-ring is embedded to ensure airtightness at the connection. The valve core 22 is made of plastic, with a positioning groove on its lower surface. The elastic element 23 is made of stainless steel, embedded in the positioning groove and tightly abutting against the inner wall of the positioning groove, while its other end abuts against the top surface of the outer wall of the housing 11. This design ensures that the elastic element 23 is always in a pre-compressed state, continuously applying a pre-tightening force to the valve core 22 in the direction of the pressure relief port 211. This pre-tightening force pushes the head of the valve core 22 tightly against the lower surface of the valve seat 21, forming a reliable seal. When the system is operating normally, this seal can completely block the pressure relief channel 201.

[0079] In this application, the dimensions of the mounting cavity 202 are precisely calculated to ensure that the valve core 22 has sufficient travel space. When pressure relief is required, the valve core 22 can overcome the spring preload under pneumatic force and rotate axially inward to open the pressure relief channel 201. When the bottom end of the valve core 22 abuts against the outer wall of the housing 11, the movement of the valve core 22 is restricted, preventing excessive movement of the valve core 22.

[0080] In one or more embodiments of this application, the housing 11 is provided with a connection port 113 connecting the ventilation duct 101 and the pressure relief channel 201, and the valve seat 21 is provided with a pressure relief port 211 connecting the pressure relief channel 201 and the outside. When the valve core 22 is closed, the pressure relief port 211 is sealed. The pressure relief channel 201 is jointly formed by the pressure relief port 211, the mounting cavity 202, and the connection port 113. In the specific implementation of this embodiment, the pressure relief channel 201 adopts a three-section connected structure. The specific flow route of the pressure relief channel 201 consists of three continuous sections: first, the upstream section from the outside atmosphere to the inside of the valve seat 21, namely the pressure relief port 211 section; then, the mounting cavity 202 section formed by the valve seat 21 and the housing 11; and finally, the downstream section from the mounting cavity 202 to the ventilation duct 101, namely the connection port 113 section on the housing 11. These three sections together constitute a complete airflow channel. This segmented channel design ensures reliable communication between the outside atmosphere and the ventilation duct 101.

[0081] The valve core 22 can be a linear motion valve core 22 or a valve core 22 that rotates around an axis. When the valve core 22 is a linear motion valve core 22, a guide structure can be provided in the valve seat 21 to prevent the valve core 22 from deviating during its movement. More preferably, in this embodiment, the valve core 22 is rotatably mounted to the valve seat 21 via a rotating shaft. Compared to a linear motion valve core 22, a valve core 22 that is sleeved on the housing 11 and rotates around an axis does not require the vertical movement of a linear motion valve core 22 to directly increase the total length of the entire housing 11, thus avoiding the brush structure becoming longer and heavier.

[0082] It should be noted that the structures and working principles of the suction motor and other components not described in detail in this application can all adopt existing solutions in the prior art, which can be understood and accepted by those skilled in the art, and therefore will not be elaborated further.

[0083] The elastic element 23 can be a tension spring, compression spring, torsion spring, or magnetic assembly, etc., to provide the preload. The movement of the valve core 22 is not limited to rotation around an axis; it can also be linear motion. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

[0084] It will be apparent to those skilled in the art that this disclosure is not limited to the details of the exemplary embodiments described above, and that this disclosure can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of this disclosure is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this disclosure. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0085] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A floor brush structure, characterized in that, The floor brush structure includes: The floor brush body includes a housing and a water tank assembly disposed within the housing. An air intake and an air outlet are formed on the housing. The air outlet is used to connect to a negative pressure generating device. An air duct is formed inside the housing, which connects the air intake and the air outlet and flows through the interior of the water tank assembly. A pressure relief assembly is provided on the floor brush body, and the pressure relief assembly includes a valve seat, a valve core, and an elastic element; The valve seat forms a pressure relief channel that connects to the outside world and the air duct; The valve core is used to open or block the pressure relief channel; The elastic element applies a preload force to the valve core; When the negative pressure value in the air duct is less than or equal to the pressure value, the valve core and the valve seat are in sealing contact, blocking the pressure relief channel; when the negative pressure value in the air duct is higher than the pressure value, the valve core moves against the preload force, opening the pressure relief channel; wherein, the pressure value is determined by the preload force.

2. The floor brush structure according to claim 1, characterized in that, The pressure relief assembly is disposed on any chamber and / or pipe connected to the air duct.

3. The floor brush structure according to claim 2, characterized in that, The air duct includes an air inlet section, a water tank section, and an air outlet section connected in sequence. The air inlet section connects the water tank assembly and the air intake. The water tank section is disposed inside the water tank assembly. The air outlet section connects the water tank assembly and the air outlet.

4. The floor brush structure according to claim 3, characterized in that, The floor brush structure also includes a suction pipe located in the air intake section and an air outlet structure located in the air outlet section. The pressure relief component is in fluid communication with the air duct and is disposed on one or more of the suction pipe, the water tank assembly, the housing and the air outlet structure.

5. The floor brush structure according to claim 2, characterized in that, The pressure relief component is located near the air intake or air outlet.

6. The floor brush structure according to claim 2, characterized in that, The valve seat is fixedly installed on the housing and forms an installation cavity with the housing. The valve core and the elastic element are both disposed in the installation cavity. One end of the elastic element abuts against the valve core, and the other end abuts against the valve seat or the housing, so that the valve core has a tendency to move in the direction of blocking the pressure relief channel.

7. The floor brush structure according to claim 6, characterized in that, The housing is provided with a connection port connecting the air duct and the pressure relief channel, and the valve seat is provided with a pressure relief port connecting the pressure relief channel and the outside. When the valve core is closed, the pressure relief port is sealed. The pressure relief channel is composed of the pressure relief port, the mounting cavity and the connection port.

8. The floor brush structure according to claim 6, characterized in that, The valve seat has a guide structure inside, and the valve core slides in conjunction with the guide structure; or... The valve core is rotatably mounted to the valve seat via a rotating shaft.

9. The floor brush structure according to claim 1, characterized in that, The elastic element is a compression spring, tension spring, torsion spring, or a magnetic component that provides preload through magnetic force.

10. A cleaning device, characterized in that, The cleaning equipment includes a floor brush structure as described in any one of claims 1 to 9.

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