A sealed liquid exchange mechanism for a vehicle washing apparatus

Abstract

This invention relates to the field of vehicle cleaning technology. The invention discloses a sealed liquid exchange mechanism for washing and wiping vehicles. This mechanism includes a first interference portion that forms a compression with the surface of a washing and wiping roller, and a sealing portion connected to the first interference portion and covering the surface of the washing and wiping roller. A second interference portion, in watertight contact with the surface of the washing and wiping roller, is provided between the sealing portion and the surface of the washing and wiping roller. The first interference portion, the sealing portion, and the second interference portion form a sealed liquid exchange cavity with the surface of the washing and wiping roller. Because a sealed liquid exchange cavity can be formed on the surface of the washing and wiping roller through the first interference portion, the sealing portion, and the second interference portion, liquid leakage will not occur in any direction during use, avoiding wastewater seepage during vehicle washing and wiping, which would affect washing efficiency.

Description

Technical Field

[0001] This invention relates to the field of vehicle cleaning technology, and more particularly to a sealed liquid exchange mechanism for washing and wiping vehicles. Background Technology

[0002] Vehicles need frequent washing; otherwise, dust will easily accumulate on their surface, affecting their appearance. Therefore, regular cleaning is necessary. Cleaning methods typically involve wiping the surface with dry tools or scrubbing with damp tools. The former only removes surface dust and cannot remove stains; the latter requires continuous tool cleaning to prevent stains from forming on the vehicle's surface, necessitating multiple cleanings and resulting in low cleaning efficiency.

[0003] Chinese Patent CN 201921781268.8 discloses a filtration and circulation device for cleaning equipment, specifically including: a wastewater filter box, an outlet pipe, an inlet pipe, a water tank, a scraper, a water pump, a water storage component, a roller brush, a drain outlet, a nozzle, a roller brush bracket, filter cotton, a filter chamber, a filter screen, an inlet, an outlet, a silicone strip, a rubber strip seat, and a spring clamping device. The device achieves the filtration and recycling of cleaning liquid through the wastewater filter box and wastewater recovery, reducing waste and improving the utilization rate of the cleaning liquid. By setting up the scraper and silicone strip, not only can wastewater be collected for filtration, but the cleaned wall surface is also cleaner, preventing wastewater from remaining on the wall surface. The entire device has low cost, simple operation, and significantly improved cleaning effect. However, judging from the technical solution disclosed in the patent, if this method is used in the field of washing and wiping vehicle devices, there is still a problem that the surface of the roller brush is not continuously sealed and rinsed, and the wastewater after cleaning is replaced with clean water in the sealed space. At the same time, the scraper in the technical solution disclosed in the patent only continuously scrapes the surface to be cleaned, not the surface of the roller brush. After the roller brush is cleaned, the garbage rolled in can only be sprayed with a small amount of water, and the effect of rinsing the roller brush is not good.

[0004] Therefore, it is necessary to design a "clean and dirty water replacement cleaning mechanism" for washing and wiping vehicle devices that has "high efficiency of clean water and sewage replacement" and can simultaneously clean the cleaning rollers in real time. Summary of the Invention

[0005] The main technical problem solved by this invention is to provide a sealed liquid exchange mechanism for a car wash, which enables the car wash device to continuously wash and wipe the surface of the vehicle without leakage of liquid. At the same time, the sealed liquid exchange mechanism can also clean the cleaning rollers in the car wash device in real time and complete efficient cleaning and replacement.

[0006] To solve the above-mentioned technical problems, the present invention provides a sealed liquid exchange mechanism for a washing and wiping vehicle. The sealed liquid exchange mechanism for the washing and wiping vehicle includes a first interference portion that forms a compression with the surface of the washing and wiping roller and a sealing portion that is connected to the first interference portion and covers the surface of the washing and wiping roller. A second interference portion is provided between the sealing portion and the surface of the washing and wiping roller for watertight contact. The first interference portion, the sealing portion and the second interference portion form a sealed liquid exchange cavity with the surface of the washing and wiping roller.

[0007] Furthermore, the sealing part is provided with a third interference part on each of the two axial sides, which is pressed against the surfaces of both ends of the washing and wiping roller to form a watertight contact.

[0008] Furthermore, the third interference section includes a guide bar, the inner side of which is provided with an inclined surface that slopes outward toward the sealed liquid exchange chamber.

[0009] Furthermore, the guide bar is arc-shaped in the length direction.

[0010] Furthermore, the first interference section has gathering strips at both ends of the washing roller along its length, which cause the liquid to gather towards the middle.

[0011] Furthermore, the first interference portion includes interference bars.

[0012] Furthermore, the aggregation stripes and interference stripes are not on the same straight line.

[0013] Furthermore, the aggregation strip is inclined towards the sealed liquid exchange cavity and forms an obtuse angle with the interference strip.

[0014] Furthermore, the circumferential arc length of the surface of the washing and wiping roller that forms part of the sealed liquid exchange cavity is less than the maximum arc length of the first interference part and the sealing part in the circumferential direction.

[0015] Furthermore, the sealing part is provided with a water-guiding structure at the contact end with the surface of the washing and wiping roller, and the water-guiding structure extends along the circumference of the washing and wiping roller towards the sealed liquid exchange cavity.

[0016] Furthermore, the second interference section is located at the end of the water diversion structure.

[0017] Furthermore, the sealed liquid exchange chamber has a C-shaped cross-section along its length perpendicular to the direction of its length.

[0018] Furthermore, a gap is provided between the end of the water-guiding structure away from the second interference section and the washing roller.

[0019] This invention relates to a sealed liquid exchange mechanism for washing and wiping vehicles. It includes a first interference portion that forms a pressure against the surface of the washing and wiping roller, and a sealing portion connected to and covering the surface of the washing and wiping roller. A second interference portion, in watertight contact with the surface of the washing and wiping roller, is provided between the sealing portion and the sealing portion. The first interference portion, the sealing portion, and the second interference portion together form a sealed liquid exchange cavity with the surface of the washing and wiping roller. Because a sealed liquid exchange cavity can be formed on the surface of the washing and wiping roller through the first interference portion, the sealing portion, and the second interference portion, liquid leakage will not occur in any direction during use, preventing wastewater seepage during vehicle washing and avoiding impact on washing efficiency. Attached Figure Description

[0020] 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.

[0021] Figure 1 This is a schematic cross-sectional view of an embodiment of a sealed liquid exchange mechanism for a washing and wiping vehicle, perpendicular to the washing and wiping rollers.

[0022] Figure 2 This is a front view of the structure of an embodiment of a sealed liquid exchange mechanism, viewed in a cross section perpendicular to the washing roller.

[0023] Figure 3 for Figure 2 Enlarged schematic diagram of part B in the middle section.

[0024] Figure 4 for Figure 1 A schematic diagram of the structure without the scrubbing roller.

[0025] Figure 5 This is a schematic diagram of another embodiment of a sealed liquid exchange mechanism.

[0026] Figure 6 This is a schematic diagram of another embodiment of a sealed liquid exchange mechanism.

[0027] Figure 7 for Figure 6 Enlarged schematic diagram of section C.

[0028] Figure 8 This is a schematic diagram of another embodiment of a sealed liquid exchange mechanism.

[0029] Figure 9 This is a schematic diagram of another embodiment of a sealed liquid exchange mechanism.

[0030] Figure 10for Figure 8 , Figure 9 A partial schematic diagram of the central water diversion structure.

[0031] Figure 11 This is a complete schematic diagram of the water-guiding structure along the axial direction of the washing and wiping roller.

[0032] Figure label:

[0033] 1. Washing roller; 2. First interference section; 21. Gathering strip; 3. Sealing section; 4. Water guiding structure; 41. Second interference section; 41. Gap D1; 41. Gap E1; 42. Guide strip; 421. Inclined surface; 422. Protrusion; 43. Water storage section; 45. Extension section; 46. Sealed liquid exchange area A; 5. Protective section; 6. First fixing member; 61. Arc surface; 7. Second fixing member; 71. Third interference section.

[0034] The circumferential arc length L1 of the washing and wiping roller surface, and the maximum arc length L2 between the first interference section and the sealing section.

[0035] The realization of the objectives, 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

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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. 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.

[0042] 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.

[0043] like Figures 1-9 As shown, the present invention provides an embodiment of a sealed liquid exchange mechanism for a washing vehicle.

[0044] like Figure 1 , Figure 2As shown, the sealed liquid exchange mechanism for the washing and wiping vehicle device includes a first interference portion 2 that forms a compression with the surface of the washing and wiping roller 1, and a guard portion 5 and a sealing portion 3 respectively provided on both sides of the circumferential direction of the surface of the washing and wiping roller 1 along the first interference portion 2. A water-tight water-guiding structure 4 is provided between the sealing portion 3 and the surface of the washing and wiping roller 1. The water-guiding structure 4 includes a second interference portion 41. The first interference portion 2, the sealing portion 3, and the water-guiding structure 4 form a sealed liquid exchange cavity A with the surface of the washing and wiping roller 1. The guard portion 5 can be fixed to the housing of the washing and wiping vehicle device. The first interference portion 2, the sealing portion 3, and the water-guiding structure 4 can form a water-tight contact with the surface of the washing and wiping roller 1. The water-guiding structure 4 also includes a water storage portion 43. The arc shape of the water-guiding structure 4 extends to the lowest point to form a concave structure water storage portion 43. In the sealed liquid exchange cavity A, the second interference portion 41 of the water-guiding structure 4 has a sewage guiding function, and the guided sewage is finally collected in the water storage portion 43.

[0045] like Figure 1 , Figure 2 As shown, the clockwise rotating scrubbing roller 1 continues to rotate after being squeezed by the first interference part 2. During the transition from the compressed state to the free state, the guard part 5 can suppress the "splashing water" outward under the action of centrifugal force during the recovery process due to the elastic material properties of the surface wiping layer of the scrubbing roller 1. At the same time, the guard part 5 can prevent external sharp objects from "puncturing" the surface wiping layer of the scrubbing roller 1.

[0046] Specifically, such as Figure 1 , Figure 3 As shown, the first interference part 2 and the second interference part 41 exert a certain squeezing effect on the surface of the washing and wiping roller 1. The first interference part 2 squeezes out the liquid inside the washing and wiping roller 1, removing dust adhering to the surface of the washing and wiping roller 1. The second interference part 41 creates a water seal with the surface of the washing and wiping roller 1, preventing leakage from the sealed liquid exchange chamber A. Figure 3 As shown, the lower surface of the second interference part 41 interferes with the washing roller 1, while the non-interfering part leaves a gap D1 with the washing roller 1. The interference between the first interference part 2 and the washing roller 1 is greater than the interference between the second interference part 41 and the washing roller 1. Thus, the "sewage" squeezed out of the washing roller 1 by the first interference part 2 will always be more than the "sewage" squeezed out of the washing roller 1 by the second interference part 41. The "sewage" squeezed out of the washing roller 1 by the first interference part 2 is mixed with the "sewage" squeezed out of the washing roller 1 by the second interference part 41 and is collected together along the upper surface of the second interference part 41 in the sealed liquid exchange chamber A. The degree of interference between the lower surface of the second interference part 41 and the washing roller 1 is controlled to a slight interference amount. The "sewage" squeezed out by the "squeezing" action on the washing roller 1 is immediately "absorbed" back into the washing roller 1 corresponding to the gap D1 and the washing roller 1 below it, so that it does not drip down the surface of the washing roller 1 onto the ground.

[0047] While using a continuously moistening cleaning roller to clean the vehicle's exterior can reduce the frequency of cleaning, the automatic cleaning process introduces several problems. Air trapped in the sponge layer of the cleaning roller during squeezing enters the cleaning fluid circuit along with the squeezed-out cleaning fluid. This increases circuit pressure, leading to low fluid delivery efficiency. The pressure is also released through the cleaning roller connected to the circuit, causing air bubbles to form on its surface. In severe cases, the accumulated pressure in the cleaning fluid circuit can breach the seals at joints and connections in the delivery pipeline, resulting in leakage. This leakage ultimately drips onto the ground from the surface of the scrubbing roller, severely impacting the performance of the car wash system. In this solution, the "sewage" squeezed out from the first interference part 2 from the washing roller 1 will definitely be more than the "sewage" squeezed out from the second interference part 41 from the washing roller 1. The "sewage" squeezed out from the first interference part 2 from the washing roller 1, mixed with the "sewage" squeezed out from the second interference part 41 from the washing roller 1 and air, is collected together on the upper surface of the second interference part 41 in the sealed liquid exchange chamber A, which can effectively prevent the "leakage" of the cleaning fluid circuit from dripping onto the ground along the surface of the washing roller 1.

[0048] As a further improved implementation, the first interference portion 2 can be configured as a strip, such as an interference strip, as needed.

[0049] As a further improved implementation method, such as Figure 5 , Figure 6 As shown, the first interference portion 2 extends at both ends of the washing roller 1 near the housing of the washing vehicle device, with converging strips 21 pointing more radially towards the washing roller 1. The closer the converging strip is to the ends of the housing, the greater the interference with the washing roller 1. This ensures that even if there is slight misalignment during the high-speed rotation of the washing roller 1, liquid leakage from both ends of the washing vehicle device housing will not occur due to insufficient interference between the washing roller and the first interference portion. The converging strip 21 is offset from the axial direction of the washing roller 1, and its curvature can be gradually changed along or against the direction of rotation of the washing roller 1.

[0050] like Figure 5 , Figure 6 , Figure 7As shown, at both ends of the first interference portion 2 along the length of the washing roller 1, there are gathering strips 21 that cause the liquid to gather towards the center. These gathering strips 21 are not on the same straight line as the first interference portion 2. Ideally, the gathering strips 21 are inclined towards the sealed liquid exchange cavity A, forming an obtuse angle α with the first interference portion 2. Because the gathering strips 21 extend into the sealed liquid exchange cavity A, when they contact the washing roller 1, the contact area between the two ends of the washing roller 1 and the liquid is reduced, and simultaneously, during compression, the liquid is also gathered towards the center.

[0051] like Figure 2 As shown, the circumferential arc length L1 of the washing roller surface forming part of the sealed liquid exchange chamber A is less than the maximum arc length L2 of the common inner wall formed by the upper surface of the first interference part and the inner surface of the sealing part in the circumferential direction. This makes the surface of the washing roller 1 forming the sealed liquid exchange chamber A smaller, which can minimize the time that the extruded wastewater stays on the surface of the washing roller 1, thereby improving the wastewater extrusion efficiency. The cross-section of the sealed liquid exchange chamber A along its length perpendicular direction can be set to a C-shape.

[0052] like Figures 1 to 4 As shown, as needed, the sealing part 3 has a water-guiding structure 4 at the contact end with the surface of the washing and rubbing roller 1. This water-guiding structure 4 extends along the circumference of the washing and rubbing roller 1 towards the sealed liquid exchange chamber A. The second interference part 41 is located at the upper end of the water-guiding structure 4, which minimizes the contact area between the second interference part 41 and the surface of the washing and rubbing roller 1 while ensuring water tightness, thereby reducing resistance to the washing and rubbing roller. Figure 3 As shown, a gap D1 is provided between the end of the water-guiding structure 4 away from the second interference part 41 and the washing roller 1.

[0053] Since a sealed liquid exchange cavity A can be formed on the surface of the washing roller 1 through the first interference part 2, the sealing part 3 and the water guiding structure 4, the sealed liquid exchange cavity will not leak liquid in any direction during use, thus avoiding sewage leakage during the vehicle washing process and affecting the washing efficiency.

[0054] As a further improved implementation method, as needed, such as Figure 6 , Figure 7As shown, the water-guiding structure 4 has third interference portions on both axial sides that are pressed against the surfaces of both ends of the washing and rubbing roller 1 to form a watertight contact. Each third interference portion includes a guide strip 42, the inner side of which has an inclined surface 421 that slopes outwards towards the sealed liquid exchange chamber A. This inclined surface 421 has an arc-shaped structure, which ensures that the contact pressure of each part when the inclined surface contacts the surface of the washing and rubbing roller 1 is basically the same. The guide strip 42 extends towards the sealed liquid exchange area A with protrusions 422. These protrusions 422, together with the first interference portion 2, the second interference portion 41, the water storage portion 43, and the sealing portion 3, enclose the sealed liquid exchange area A on both sides of the sealed liquid exchange area A, forming a sealed liquid exchange area A near the two ends of the washing and rubbing roller 1. The water storage portion 43, the water-guiding portion 41, the guide strip 42, and the sealing portion 3 cooperate with the surface of the washing and rubbing roller 1 to form the sealed liquid exchange area A. The extension portion 45 and the water-guiding portion 41 are located on both sides of the water storage portion 43. The water storage section 214 and the sealing section 202 are fixed together with a waterproof connection. The third interference section can seal the liquid exchange chamber A in the axial direction to maintain watertightness. The guide strip 42 can be set as an arc-shaped structure in the length direction, so as to form a better watertight interference with the surface of the washing roller 1.

[0055] like Figure 3 , Figure 6 , Figure 7 As shown, the water guiding structure 4 includes a second interference portion 41 in contact with the surface of the washing and rubbing roller 1, a water storage portion 43 connected to the second interference portion 41, guide strips 42 that cause interference between the surfaces of both ends of the washing and rubbing roller 1, and an extension portion 45 with a gap D1 between it and the surface of the washing and rubbing roller 1. The circumferential end of the second interference portion 41 has a lower surface of the second interference portion (not shown in the figure) that forms a watertight contact with the surface of the washing and rubbing roller 1. Guide strips 42 that cause interference between the surfaces of both ends of the second interference portion 41 extend from both ends in the length direction, that is, the guide strips 42 are in partial contact with the surface of the washing and rubbing roller 1. The inner side of the guide strip 42 is provided with an inclined surface 421, which is an arc-shaped structure. The arc-shaped structure design of the inclined surface 421 can keep the contact pressure of each part when the inclined surface contacts the surface of the washing and rubbing roller 1 basically the same. The guide strip 42 extends towards the sealed liquid exchange zone A with protrusions 422. The portion of these protrusions 422 near both ends of the washing roller 1, together with the first interference portion 2, the second interference portion 41, the water storage portion 43, and the sealing portion 3, forms a sealed liquid exchange zone A on the surface of the washing roller 1. The water storage portion 43, the second interference portion 41, the guide strip 42, the sealing portion 3, and the first interference portion 2 cooperate with the surface of the washing roller 1 to form a complete sealed liquid exchange zone A. The extension portion 45 and the second interference portion 41 are located on both sides of the water storage portion 43. The water storage portion 43 and the sealing portion 3 are fixed by a waterproof connection or integrally formed.

[0056] like Figures 1 to 7As shown, the protective barrier 5, the first interference part 2, the sealing part 3 and the water guiding structure 4 are a complete and continuous sealed whole. Although different names have been given to the various functional parts above, it does not affect the overall understanding of the technical solution by those skilled in the art. All simple modifications and alterations based on the aforementioned technical solutions are within the protection scope of this application.

[0057] In this embodiment, the sealed liquid exchange mechanism is an integral structure, that is, the guard part 5, the first interference part 2, the sealing part 3, the water storage part 43, the extension part 45 and the second interference part 41 adopt an integral and non-separable structure. Alternatively, the sealed liquid exchange cavity A can be formed by appropriately fixing and connecting separate parts as needed, which will not be described in detail here.

[0058] As a further improved implementation, the sealed liquid exchange mechanism may be constructed as a detachable integral component by sealing and connecting multiple parts as needed. Although the following implementation uses a sealed liquid exchange mechanism that is implemented by multiple parts, the part numbers and names mentioned in the following description are consistent with those of this embodiment. Alternatively, those skilled in the art may make simple modifications and expansions based on the following text description and drawings, all of which are within the protection scope of the technical solution disclosed in this embodiment.

[0059] As a further improved implementation, the sealed liquid exchange mechanism can also be implemented by multiple parts working together. When multiple separate parts work together, the processing and manufacturing difficulty of the sealed liquid exchange mechanism can be reduced.

[0060] As a further improved implementation method, as needed, such as Figure 8 , Figure 10 As shown, the water-guiding structure 4 is a structure that can be detached and separated from the sealed liquid exchange mechanism. The baffle 5, the first interference part 2, and the sealing part 3 are integrally formed to form the upper part of the sealed liquid exchange mechanism. The straight part 46 of the water-guiding structure 4 is provided with several through holes (not shown in the figure). The lower part of the sealed liquid exchange mechanism includes the water-guiding structure 4 and the first fixing member 6. The top of the first fixing member 6 is provided with several nut pillars (not shown in the figure). The nut pillars cooperate with the through holes. Then, fastening screws are driven into the top of the straight part 46 of the water-guiding structure 4 to realize the installation of the large component of the complete sealed liquid exchange mechanism.

[0061] As a further improved implementation method, as needed, such as Figure 9 , Figure 10As shown, the lower part of the sealed liquid exchange mechanism also includes a second fixing member 7, which can be detachably connected to the first fixing member 6 by an interference fit through an opening at the bottom of the first fixing member 6 (not shown in the figure). To facilitate disassembly and assembly, a gap E1 is left between the second fixing member 7 and the first fixing member 6 so that the compressed air during the interference fit insertion process still has some space, improving the convenience of disassembly and assembly.

[0062] As a further improved implementation method, as needed, such as Figure 8 , Figure 9 As shown, in the middle of the sealed liquid exchange chamber A of the sealed liquid exchange mechanism assembled by the water-guiding structure 4, the first fixing member 6, and the second fixing member 7, there is an air supply port (not shown in the figure) communicating with the air outlet (not shown in the figure). The main part of the air supply port communicating with the air outlet is located in the middle of the first fixing member 6. The side of the first fixing member 6 facing the surface of the scrubbing roller 1 is an arc surface 61 with a relatively large curvature. The end of the second fixing member 7 that points to and cooperates with the scrubbing roller 1 is provided with a third interference part 71. The arc surface 61 of the first fixing member 6 and the third interference part 71 of the second fixing member 7 are both designed to increase the smoothness of the scrubbing roller 1 before it re-enters the sealed liquid exchange chamber A in a clockwise rotation state, and to absorb and block some fine particles of debris from separating from the surface of the scrubbing roller 1 through the arc surface 61 and the third interference part 71. On the other hand, the air outlet provided in the middle of the lower part of the sealed liquid exchange chamber A outside the sealed liquid exchange chamber can increase the air outlet area in the guide part of the air outlet (not shown in the figure), further reducing the air outlet velocity. At the same time, it is more conducive to the exhaust air being evenly distributed to the surface of the sufficiently large washing roller 1, further reducing the noise generated by the washing vehicle device during the pressure relief and exhaust process.

[0063] 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 sealed liquid exchange mechanism for a car wash device, characterized in that, It includes a first interference portion that forms a compression with the surface of the washing and rubbing roller. The first interference portion is provided with a guard portion and a sealing portion on both sides of the circumferential direction of the washing and rubbing roller surface. The sealing portion is provided with a water-guiding structure at the contact end with the washing and rubbing roller surface. A second interference portion is provided between the sealing portion and the washing and rubbing roller surface, and the first interference portion, the sealing portion and the second interference portion form a sealed liquid exchange cavity with the washing and rubbing roller surface. The upper part of the sealing liquid exchange mechanism is formed by the protective part, the first interference part and the sealing part. The lower part of the sealing liquid exchange mechanism includes a water intake structure and a first fixing member. An air supply port communicating with the air outlet is provided in the middle part outside the sealing liquid exchange cavity of the sealing liquid exchange mechanism. The main body part communicating with the air supply port and the air outlet is located in the middle part of the first fixing member.

2. The sealed liquid exchange mechanism for a car washing device according to claim 1, characterized in that, The sealing part is provided with a third interference part on both sides of the axial direction, which is squeezed to form a watertight contact with the surfaces of both ends of the washing and wiping roller.

3. The sealed liquid exchange mechanism for a car washing device according to claim 2, characterized in that, The third interference section includes a guide bar, the inner side of which is provided with an inclined surface that slopes outward toward the sealed liquid exchange chamber.

4. The sealed liquid exchange mechanism for a car washing device according to claim 3, characterized in that, The guide bar is arc-shaped along its length.

5. The sealed liquid exchange mechanism for a car washing device according to claim 1, characterized in that, The first interference section has gathering strips at both ends of the washing roller along its length, which cause the liquid to gather towards the middle.

6. The sealed liquid exchange mechanism for a car washing device according to claim 5, characterized in that, The first interfering part includes the interfering bars.

7. The sealed liquid exchange mechanism for a car washing device according to claim 6, characterized in that, The convergence bars and interference bars are not on the same straight line.

8. The sealed liquid exchange mechanism for a car washing device according to claim 7, characterized in that, The aggregation strips tilt toward the sealed liquid exchange cavity and form an obtuse angle with the interference strips.

9. The sealed liquid exchange mechanism for a car washing device according to claim 1, characterized in that, The circumferential arc length of the washing roller surface that forms part of the sealed liquid exchange chamber is less than the maximum arc length of the first interference part and the sealing part in the circumferential direction.

10. The sealed liquid exchange mechanism for a car washing device according to claim 1, characterized in that, The water-guiding structure extends along the surface of the washing and wiping rollers toward the sealed liquid exchange chamber.

11. The sealed liquid exchange mechanism for a car washing device according to claim 1, characterized in that, The second interference part is located at the end of the water intake structure, and the lower half of the sealed liquid exchange mechanism also includes a second fixing member, which is detachably connected to the first fixing member.

12. The sealed liquid exchange mechanism for a car washing device according to claim 1, characterized in that, The sealed liquid exchange chamber has a C-shaped cross-section along its length perpendicular to the direction of its length.

13. The sealed liquid exchange mechanism for a car washing device according to claim 1, characterized in that, A gap is provided between the end of the water-guiding structure away from the second interference section and the washing roller.

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