A water tank device for a vehicle cleaning tool

Abstract

The application is suitable for the technical field of vehicle cleaning tools. The application discloses a water tank device suitable for vehicle cleaning tools, which comprises a water tank for containing cleaning liquid, a waterway interface for conveying the cleaning liquid and recycling sewage diluted by the cleaning liquid, and a pressure relief assembly for communicating the inside and outside of the water tank. The waterway interface comprises a clean water output assembly and / or a sewage access assembly provided with automatic closure. The water supply device further comprises a filter assembly connected with the clean water output assembly or the sewage access assembly. Since the water tank is provided with the filter assembly, the recycled sewage can be reused after filtration, or the conveyed cleaning liquid can be used after filtration, so that the utilization efficiency of water in the water tank can be improved, the cleaning time can be prolonged, and the pressure increase of the water tank in the sewage utilization process can be released by the pressure relief assembly.

Description

Technical Field

[0001] This invention relates to the field of vehicle cleaning technology, and more particularly to a water tank device suitable for vehicle cleaning tools. Background Technology

[0002] Vehicles require regular washing; otherwise, dust easily accumulates on their surfaces, affecting their appearance. Currently, vehicles are cleaned in two ways: one is through professional car detailing shops, and the other is by the user using specialized tools. The former has drawbacks: it requires moving the vehicle to a detailing shop, takes a long time, is expensive, and uses a lot of water, which is not environmentally friendly. The latter, while cheaper, uses a significant amount of water, leading to waste, and is also more labor-intensive and prone to incomplete cleaning, failing to achieve the desired results.

[0003] A new technology has emerged that can clean cleaning tools online during vehicle washing, keeping them clean and saving water while improving cleaning effectiveness. However, online cleaning tools require separate clean water and wastewater tanks. When arranged independently, the water tanks take up a large volume, and the complex piping connections increase the weight of the cleaning tools, causing inconvenience for users.

[0004] When vehicle cleaning tools use cleaning rollers for continuous cleaning, during the automatic cleaning process, some air trapped in the gaps of the cleaning roller's scrubbing sponge layer is squeezed into the cleaning fluid circuit along with the squeezed water. This increases the circuit pressure, resulting in low fluid delivery efficiency. In severe cases, the accumulated pressure in the cleaning fluid circuit can "break open" the seals at joints and connections in the delivery pipeline, causing the cleaning fluid circuit to "leak," which seriously affects the performance of the car wash device. Summary of the Invention

[0005] The main technical problem solved by this invention is to provide a water tank device suitable for vehicle cleaning tools. This water tank device can avoid wear and tear and can be replaced as a whole, thus reducing the cost of use.

[0006] To solve the above-mentioned technical problems, the present invention provides a water tank device suitable for vehicle cleaning tools. The water tank device suitable for vehicle cleaning tools includes: a water tank for holding cleaning liquid; a water inlet for conveying cleaning liquid and recovering wastewater diluted with cleaning liquid; and a pressure relief component connecting the inside and outside of the water tank.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the water interface includes a clean water output component that is equipped with automatic closing.

[0009] Furthermore, the water interface also includes a sewage inlet assembly with automatic closing mechanism.

[0010] Furthermore, the water tank device for vehicle cleaning tools also includes a filter assembly connected to a clean water output assembly or a wastewater inlet assembly.

[0011] Furthermore, both the clean water output component and the wastewater inlet component include inlet / outlet pins with through holes and interface connectors fitted onto the inlet / outlet pins. The inlet / outlet pins are fitted with inlet / outlet pressure springs that cause the inlet / outlet pin structure to extend. The inlet / outlet pins include a push-out portion that mates with the inlet / outlet port on the interface connector and a limiting portion that restricts the movement position. A sealing ring is provided between the push-out portion and the inlet / outlet port. When the inlet / outlet pin is pushed and moved, the through hole and the inlet / outlet port...

[0012] Furthermore, the interface connector is provided with two inlet and outlet water cavities that are connected to the water tank. These two inlet and outlet water cavities can form two inlet and outlet water channels through through holes and inlet and outlet water ports.

[0013] Furthermore, the interface connector is an integral structure, the two inlet and outlet water cavities are independently configured, and the two inlet and outlet water channels are independently configured.

[0014] Based on the above technical solution, the present invention can be further improved as follows. Specifically, the pressure relief assembly includes a pressure relief pipe located inside the water tank and an installation component connected to the pressure relief pipe. The installation component is fixed to a connecting seat on the water tank. The water tank is provided with a one-way pressure relief port, which is located in the area defined by the connecting seat and communicates with the water tank through the pressure relief pipe.

[0015] Furthermore, the connector is located on the side of the water tank away from the water inlet.

[0016] Furthermore, the pressure relief pipe is a flexible pressure relief pipe, and a floating structure is connected to the free end of the flexible pressure relief pipe to make the pressure relief vent above the liquid surface. The floating structure has one or more pressure relief micro-holes that communicate with the pressure relief vent.

[0017] Furthermore, the buoyancy structure includes a buoyancy ball.

[0018] Furthermore, the buoyancy ball is provided with a filter screen at least around the pressure relief micropores.

[0019] Based on the above technical solution, the present invention can be further improved as follows.

[0020] Furthermore, the water tank is also equipped with a suction pipe that is connected to the clean water output component. The suction pipe extends to the bottom of the end of the rotary filter component that is away from the sewage inlet component. The other end of the suction pipe is equipped with a water inlet. The clean water output component can still output water stably when it is tilted upwards.

[0021] Furthermore, the sidewall of the water-absorbing pipe is covered with multiple water-absorbing holes along its length and circumference.

[0022] Based on the above technical solution, the present invention can be further improved as follows.

[0023] Furthermore, the water tank includes an upper shell and a lower shell, which are sealed together by an ultrasonic welding layer. The bottom of the lower shell extends upward on one side as a slope. The top of the slope of the lower shell, opposite the water inlet, is provided with a snap-fit ​​part for easy installation and fixing. The snap-fit ​​part has a recessed snap-fit ​​groove.

[0024] This invention relates to a water tank device for vehicle cleaning tools, comprising a water tank for holding cleaning fluid, a water inlet for conveying the cleaning fluid and recovering wastewater diluted with the cleaning fluid, and a pressure relief component connecting the inside and outside of the water tank. The water inlet includes a clean water output component and / or a wastewater inlet component with automatic closing. The water tank device for vehicle cleaning tools also includes a filter component connected to either the clean water output component or the wastewater inlet component.

[0025] Because the water tank is equipped with a filtration system, recycled wastewater can be filtered and reused, or the delivered cleaning solution can be filtered before use, improving water utilization efficiency and extending cleaning time. Simultaneously, a pressure relief component releases any pressure buildup in the tank during the use of clean or wastewater. Furthermore, the water tank has only one return water inlet and / or one clean water outlet, reducing the complexity of its design and manufacturing.

[0026] The pressure relief assembly includes a pressure relief pipe located inside the water tank and a mounting component connected to the pressure relief pipe. The mounting component is fixed to a connecting seat on the water tank. The water tank has a one-way pressure relief port, which is connected to the water tank via the pressure relief pipe. The pressure relief pipe is a flexible pressure relief pipe, with a pressure relief vent at its free end that communicates with the water tank. This prevents the pressure relief pipe from becoming immobile at specific angles, thus preventing pressure relief. The free end of the pressure relief pipe has a buoyancy structure that keeps the pressure relief vent above the liquid surface. This buoyancy structure has one or more pressure relief micro-holes communicating with the pressure relief vent, ensuring that the pressure relief vent is always above the liquid level under normal operating conditions, thereby effectively releasing pressure. The buoyancy structure includes a buoyancy ball and a filter screen at least around the pressure relief micro-holes. With proper design, utilizing the small pores of the filter screen and the surface tension of water, a water film can be formed on the surface of the filter screen, effectively preventing liquid from entering. Simultaneously, because the water film formed on the surface of the filter screen cannot withstand pressure when pressure is present, it is easily released through the water film.

[0027] The water tank is also equipped with a water suction pipe that is connected to the water interface. The water suction pipe extends to the bottom of the filter assembly away from the water interface. The other end of the water suction pipe is equipped with a water inlet. Water can still be discharged stably when the water interface is tilted upwards.

[0028] The bottom of the water tank is sloped, and the top of the sloped bottom of the water tank is provided with a card interface for easy installation and fixing on the side opposite to the water inlet. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 in the description only show some embodiments of the present invention, and therefore should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a perspective view of a water tank structure according to an embodiment of the present invention.

[0031] Figure 2 The left figure shows the structure of a water tank according to an embodiment of the present invention.

[0032] Figure 3 for Figure 2 Planar view from direction A.

[0033] Figure 4 This is a front view of a water tank placed horizontally according to an embodiment of the present invention.

[0034] Figure 5 for Figure 4 Planar view from direction B.

[0035] Figure 6 for Figure 5 A magnified view of a section at point C.

[0036] Figure 7 This is a schematic diagram of the working state of the water tank tail at its highest point according to an embodiment of the present invention.

[0037] Figure 8 This is a schematic diagram of the working state of the water tank water circuit interface at the highest point according to an embodiment of the present invention.

[0038] Figure label:

[0039] Water interface 10, interface terminal 101, clean water output component 102, sewage inlet component 103, water interface bottom shell 104, water interface bottom shell through hole 1041, suction pipe 106;

[0040] Water tank 20, snap-fit ​​part 201, snap-fit ​​groove 202, one-way pressure relief port 203, pressure relief component connecting seat 204;

[0041] Pressure relief assembly 30, pressure relief assembly mounting part 301, pressure relief pipe 302, pressure relief vent 3021, buoyancy structure 303, pressure relief micro-hole 3031;

[0042] Filter assembly 40, filter assembly connection port 401, filter bracket 402;

[0043] Water outlet pin 1021, water outlet sealing ring 1022, water outlet limiting part 1023, water outlet channel 1024, water outlet pressure spring 1025;

[0044] Return water ejector pin 1031, return water sealing ring 1032, return water limiting part 1033, return water channel 1034, return water pressure spring 1035;

[0045] Liquid level line H;

[0046] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0047] The claims of the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of the present invention.

[0048] It should be understood that, in the description of the embodiments of the present invention, all directional indicating terms, such as "up," "down," "left," "right," "front," and "back," indicate the orientation or positional relationship based on the orientation and positional relationship shown in the accompanying drawings or the orientation or positional relationship commonly used when the product is in use. These terms are merely for the purpose of simplifying the description of the present invention and do not explicitly or implicitly suggest that the device, element, or component referred to must have a specific orientation or specific orientational structure, and should not be construed as a limitation of the present invention. They are only used to explain the relative positional relationships and movements between the components shown in the accompanying drawings. When this specific orientation changes, the directional indication may also change accordingly.

[0049] Furthermore, in this invention, ordinal numbers such as "first" and "second" are used for distinguishing purposes only and should not be construed as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Thus, the features referred to as "first" and "second" may explicitly or implicitly include at least one of those technical features. In the description of this invention, "a plurality of" means at least two, i.e., two or more, unless otherwise explicitly defined; "at least one" means one or more.

[0050] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," and "screw-in" should be interpreted broadly. For example, they can refer to a relatively fixed positional relationship between components, or a physically fixed connection between components; they can be detachable connections or integral structures; they can be mechanical connections or electrical signal connections; they can be direct connections or indirect connections through intermediate media or components; they can refer to the internal communication of two elements or the interaction between two elements. Unless otherwise explicitly limited in the specification, other interpretations will not achieve the corresponding functions or effects. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0051] If the controllers or control circuits involved in this invention are conventional control technologies or units for those skilled in the art, such as the control circuits of the controllers, they can be implemented by those skilled in the art using existing methods, such as simple programming. Regarding software or programs that work with hardware to achieve control results, unless the description provides a detailed explanation of the control process of the software or programs involved, this pertains to the use of existing technology or conventional techniques for those skilled in the art. The power supply also employs existing technology in the art. Furthermore, since the main inventive aspect of this invention lies in the improvement of the mechanical device, this invention will not provide a detailed explanation of the specific circuit control relationships and circuit connections.

[0052] This invention discloses many different embodiments or examples for implementing different structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described herein. Of course, these are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0053] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0054] like Figures 1-8 As shown, the present invention provides an embodiment of a water tank device suitable for vehicle cleaning tools.

[0055] Specifically, such as Figure 1 , Figure 3 , Figure 4 As shown, the water tank device for vehicle cleaning tools includes a water tank 20 for holding cleaning fluid, a water inlet 10 for conveying cleaning fluid and simultaneously recovering wastewater diluted with the cleaning fluid, and a pressure relief assembly 30 connecting the inside and outside of the water tank.

[0056] like Figure 1 , Figure 3 , Figure 5 As shown, the water interface 10 includes an interface connector 101, an automatically closing clean water output component 102, an automatically closing wastewater inlet component 103, and a water interface bottom shell 104. The water interface bottom shell 104 faces the internal accommodating space of the water tank 20, and the interface connector 101 faces the external space of the water tank 20. The clean water output component 102 and the wastewater inlet component 103 are confined within the space enclosed by the interface connector 101 and the water interface bottom shell 104. The openings of the clean water output component (not shown in the figure) and the wastewater inlet component (not shown in the figure) correspond to the openings of the interface connector (not shown in the figure) and the water interface bottom shell (not shown in the figure). The clean water output component 102 and the wastewater inlet component 103 cannot move within the plane defined by the end face of the interface connector 101.

[0057] Specifically, such as Figure 5 , Figure 6As shown, the clean water output assembly 102 includes a water outlet pin 1021 with a through hole and an interface end piece 101 sleeved on the water outlet pin. A water outlet pressure spring 1025 is sleeved on the water outlet pin to keep it extended. The water outlet pin includes an ejector portion (not shown in the figure) that mates with a clean water outlet (not shown) on the interface end piece and a water outlet limiting portion 1023 that restricts its movement. A water outlet sealing ring 1022 is provided between the ejector portion and the clean water outlet. When the water outlet pin is pressed and moved, the through hole communicates with the clean water outlet. The interface end piece has a water outlet cavity (not shown in the figure) communicating with the water tank. This water outlet cavity can form a water outlet channel 1024 with the clean water outlet through the through hole.

[0058] Specifically, such as Figure 5 , Figure 6 As shown, the sewage inlet assembly 103 includes a return water pin 1031 with a through hole and an interface end piece 101 sleeved on the return water pin. A return water pressure spring 1035 is sleeved on the return water pin to cause the outlet pin structure to extend. The return water pin includes an ejector part (not shown in the figure) that cooperates with the return water inlet (not shown in the figure) on the interface end piece and a return water limiting part 1033 that restricts its movement. A return water sealing ring 1032 is provided between the ejector part and the return water inlet. When the return water pin is pressed and moved, the through hole communicates with the return water inlet. The interface end piece has a return water cavity (not shown in the figure) communicating with the water tank. This return water cavity can form a return water channel 1034 with the return water inlet through the through hole.

[0059] As needed, such as Figure 3 , Figure 5 As shown, the water tank device for vehicle cleaning tools also includes a filter assembly 40 that converts the recovered liquid into a cleaning fluid. The end of the filter assembly 40 away from the water inlet 10 extends to an inclined surface near the water tank 20, thereby increasing the surface area of ​​the filter assembly 40. The filter assembly 40 includes a filter support 402 and a filter screen (not shown in the figure) covering the surface of the cage-like filter support 402 to form a relatively independent space. The independent space is connected to the water tank through the filter screen. The filter screen is provided with filter holes (not shown in the figure). The filter assembly 40 has an opening at only one end. The cage-like filter support 402 has a filter assembly connection port 401 with external threads on the outer surface of the opening end of the filter assembly 40. The cage-like filter support 402 engages with the internal thread of one end of the interface connector 101 of the water inlet 10 through the filter assembly connection port 401, thereby realizing the detachable connection of the filter assembly 40 to the water inlet 10.

[0060] Specifically, such as Figure 5 , Figure 6 , Figure 7As shown, the water inlet 10 has an interface for connecting to a suction pipe 106 (not shown in the attached diagram) at one end near the water tank cavity. The suction pipe 106 extends all the way to the bottom of the filter assembly 40. Wastewater flowing back into the water tank 20 is filtered by the filter assembly 40 and becomes relatively cleaner water. This clean water is then drawn into the water inlet 10 through the suction pipe 106 and transported through a pipeline to the surface of the cleaning roller to scrub the sponge layer (not shown in the attached diagram). The length of the suction pipe 106 should not be too short; otherwise, the water supply device will tilt upwards (e.g., ...). Figure 8 (As shown) and when the liquid level H is too low, the suction pipe 106 cannot draw in clean water. The length of the suction pipe 106 is kept slightly shorter than the length of the filter assembly 40. This ensures that the inlet pipe can smoothly draw in water when the water supply device is tilted upwards and the liquid level is too low. The inlet of the suction pipe 106 (not shown in the attached figure) is located at the end of the inlet pipe. Multiple inlet holes (not shown in the attached figure) are provided on the side wall of the inlet pipe. Multiple inlet holes are distributed throughout the length and circumference of the entire inlet pipe. A certain gap is left between the inlet, the inlet holes, and the bottom and side walls of the filter assembly 40 to ensure that the filter assembly 40 not only relies on the filtering effect of the filter screen but also leaves a certain space for the filtered clean water to have a certain gradual change in flow rate, avoiding the accumulation of impurities around the inlet and inlet holes. The advantage of multiple inlet holes distributed throughout the length and circumference of the entire inlet pipe is that regardless of whether the water supply device is tilted upwards (as shown in the attached figure), the inlet pipe can draw in clean water smoothly when the water supply device is tilted upwards (as shown in the attached figure). Figure 8 (as shown) or tilted downwards (as shown) Figure 7 As shown in the diagram, the water inlet and / or water inlet hole can draw in enough clean water so that the car wash device equipped with the water supply device can work properly.

[0061] Specifically, such as Figure 2 , Figure 3 As shown, the bottom of the water tank is set as a slope, and the top end of the slope of the bottom of the water tank is provided with a concave snap-fit ​​part 201 for easy installation and fixing on the side opposite to the water interface 10. The snap-fit ​​part is further provided with a snap-fit ​​groove 202 that is further concave.

[0062] Furthermore, the water tank includes an upper shell (not shown in the figure) and a lower shell (not shown in the figure). The upper shell and the lower shell are sealed together by an ultrasonic welding layer (not shown in the figure). The bottom of the lower shell extends upward on one side as a slope. The top end of the slope of the lower shell, opposite the water inlet 10, is provided with a snap-fit ​​part 201 for easy installation and fixing. This snap-fit ​​part is provided with a concave snap-fit ​​groove 202. Specifically, as shown... Figure 1 , Figure 3As shown, the pressure relief assembly 30 includes a pressure relief pipe 302 located inside the water tank and a mounting component 301 connected to the pressure relief pipe. The mounting component is fixed to a connecting seat 204 on the water tank. Within the area defined by the connecting seat 204, the water tank has a one-way pressure relief port 203, which communicates with the water tank via the pressure relief pipe. Figure 3 As shown, the pressure relief pipe is a flexible pressure relief pipe, with a pressure relief vent 3021 communicating with the water tank at its free end. The free end of the pressure relief pipe has a buoyancy structure 303 that positions the pressure relief vent above the liquid surface. This buoyancy structure has one or more pressure relief micro-holes 3031 communicating with the pressure relief vent 3021. The buoyancy structure includes a buoyancy ball. The buoyancy ball has a filter screen (not shown in the figure) at least around the pressure relief micro-holes.

[0063] The pressure relief pipe is a flexible pipe with a pressure relief vent at its free end that communicates with the water tank. This prevents the pipe from becoming immobile at specific angles, thus ensuring pressure relief. The free end of the pipe features a buoyancy structure that keeps the vent above the liquid surface, guaranteeing effective pressure release under normal operating conditions. The buoyancy structure includes a buoyancy ball and a filter screen at least around the vent. With proper design, the small pore size of the filter screen and the surface tension of water create a water film on its surface, effectively preventing liquid from entering. Furthermore, the water film formed on the filter screen is not pressure-resistant under pressure and is easily released through the water film.

[0064] Because the water tank is equipped with a filtration system, the recycled wastewater can be filtered and reused, improving water utilization efficiency and extending cleaning time. A pressure relief system also releases any pressure buildup during wastewater reuse. Furthermore, the water tank has only one return water inlet and / or one clean water outlet, reducing the complexity of its design and construction.

[0065] As needed, the outlet interface connector and the return interface connector are an integral structure, with the return cavity and the outlet cavity being independently set. To better secure the sealing rings, the return pin and the outlet pin are respectively provided with fixing grooves for securing the return sealing ring and the outlet sealing ring.

[0066] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention 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 of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A water tank device for a vehicle cleaning tool, characterized by comprising: include: Water tank, used to hold cleaning solution; Water interface for conveying cleaning fluid and recovering wastewater diluted with the cleaning fluid, including a clean water output component that can be automatically closed, and a wastewater inlet component that can be automatically closed; Pressure relief assembly connects the inside and outside of the water tank; The filter assembly is connected to the clean water output assembly or the wastewater inlet assembly; The clean water output component and the wastewater inlet component each include an inlet / outlet pin with a through hole and an inlet / outlet interface end piece sleeved on the inlet / outlet pin. The inlet / outlet pin is sleeved with an inlet / outlet pressure spring that causes the inlet / outlet pin to extend. The inlet / outlet pin includes an ejector part that cooperates with the inlet / outlet port on the inlet / outlet interface end piece and a limiting part that restricts the movement position. A sealing ring is provided between the ejector part and the inlet / outlet port. When the inlet / outlet pin is pushed and moved, the through hole communicates with the inlet / outlet port.

2. The water tank device for a vehicle cleaning tool according to claim 1, wherein The inlet and outlet water interface connector is provided with two inlet and outlet water cavities that are connected to the water tank. These two inlet and outlet water cavities can form two inlet and outlet water channels through the through holes and the inlet and outlet water ports.

3. The water tank device for a vehicle cleaning tool according to claim 2, wherein The inlet and outlet water interface connectors are integrated into one piece, with two inlet and outlet water cavities and two inlet and outlet water channels set independently.

4. The water tank device for vehicle cleaning tools according to claim 1, characterized in that, The pressure relief assembly includes a pressure relief pipe located inside the water tank and a mounting component connected to the pressure relief pipe. The mounting component is fixed to a connecting seat on the water tank. The water tank is provided with a one-way pressure relief port, which is located in the area defined by the connecting seat and communicates with the water tank through the pressure relief pipe.

5. The water tank device for a vehicle cleaning tool according to claim 4, wherein The connector is located on the side of the water tank away from the water inlet.

6. The water tank device for a vehicle cleaning tool according to claim 5, wherein The pressure relief pipe is a flexible pressure relief pipe. A floating structure is connected to the free end of the flexible pressure relief pipe to make the pressure relief vent above the liquid surface. The floating structure has one or more pressure relief micro-holes that communicate with the pressure relief vent.

7. The water tank device for a vehicle cleaning tool according to claim 6, wherein The buoyancy structure includes a buoyancy ball.

8. The water tank device for a vehicle cleaning tool according to claim 7, wherein The buoyancy ball is equipped with a filter screen at least around the pressure relief micropores.

9. The water tank assembly for a vehicle cleaning tool of claim 1, wherein, The water tank is also equipped with a suction pipe that connects to the water interface. The suction pipe extends to the bottom of the filter assembly away from the water interface. The other end of the suction pipe has a water inlet, which can still stably output water when the water interface is tilted upwards.

10. The water tank device for a vehicle cleaning tool according to claim 9, wherein The sidewall of the suction pipe is covered with multiple suction holes along its length and circumference.

11. The water tank assembly for a vehicle cleaning tool of claim 1, wherein, The water tank includes an upper shell and a lower shell, which are sealed together by an ultrasonic welding layer. The bottom of the lower shell extends upward on one side as a slope. The top of the slope of the lower shell, opposite the water inlet, is provided with a snap-fit ​​part for easy installation and fixing. The snap-fit ​​part has a recessed snap-fit ​​groove.

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