A hand-held car duster

Abstract

The application is suitable for the technical field of cleaning, and discloses a hand-held car cleaning machine, which comprises an electric scrubbing head, a handle connected with the electric scrubbing head, and a water tank arranged on the handle and used for supplying water to the electric scrubbing head and collecting sewage, wherein the water tank comprises a water tank body provided with a liquid storage cavity, a water inlet and outlet mechanism arranged on the water tank body and used for being communicated with the storage cavity after the water tank body is pressed, and a pressure relief mechanism used for keeping the pressure balance of the water tank, wherein the pressure relief mechanism comprises a pressure relief pipe connected with the water inlet and outlet mechanism, and a buoyancy component capable of adjusting the air pressure in the water tank body is arranged at the free end of the pressure relief pipe. Since the pressure relief mechanism can keep part of the air in the water tank communicated with the outside through the water inlet and outlet mechanism, when the pressure of the water tank appears due to the cleaning process, the air can be transported to the outside of the water tank together with the clean water, so that the pressure balance between the inside and the outside of the water tank is achieved, and the phenomenon of bubbles appearing on the scrubbing head due to the release of the water tank pressure through the scrubbing head during the car washing process can be avoided.

Description

Technical Field

[0001] This invention relates to the field of cleaning technology, and more particularly to a handheld car washing machine. Background Technology

[0002] Continuous scrubbing is usually required during the scrubbing process to achieve higher cleaning efficiency. However, when using a scrubbing roller, the surface of which is usually made of sponge, wastewater is collected after squeezing the roller, and the squeezed-out air is also collected, causing an increase in pressure within the liquid collection chamber. Effectively releasing this pressure becomes a problem that needs to be solved. Summary of the Invention

[0003] The main technical problem solved by this invention is to provide a handheld car wash machine that can avoid the formation of air bubbles on the wash head due to increased water tank pressure during the car washing process.

[0004] To solve the above-mentioned technical problems, the present invention provides a handheld car washing machine, which includes an electric washing head and a body connected to the electric washing head, and a water tank provided on the body to supply water to the electric washing head and collect wastewater. The water tank includes a water tank body with a liquid storage cavity and a water inlet / outlet mechanism that communicates with the storage cavity when the water tank body is pressurized, as well as a pressure relief mechanism that can maintain the pressure balance of the water tank. The pressure relief mechanism includes a pressure relief pipe connected to the water inlet / outlet mechanism. The free end of the pressure relief pipe is provided with a buoyancy component that can adjust the air pressure inside the water tank body. The pressure relief pipe has a flexible structure between the water inlet / outlet mechanism and the buoyancy component.

[0005] Furthermore, the buoyancy component includes a buoyancy ball, which can release air pressure to the outside of the water tank body through the pressure relief pipe.

[0006] Furthermore, the buoyancy ball is provided with a branch pipe, one end of which extends from the fixed end where the buoyancy ball and the pressure relief pipe are fixed and the free end is flush with the buoyancy ball. The free end is provided with a first pressure relief port, and there is one or more protrusions next to the first pressure relief port to prevent liquid from being poured into the first pressure relief port.

[0007] Furthermore, the plurality of protrusions detachably secure a filter assembly, which covers the first pressure relief port.

[0008] Furthermore, the buoyancy ball has a cavity, and the branch pipe penetrates the buoyancy ball to form a closed cavity.

[0009] Furthermore, the protrusion is provided with a second pressure relief port that communicates with the first pressure relief port. This second pressure relief port may be submerged in the liquid or may float on the surface of the liquid.

[0010] Furthermore, the branch pipe is arranged along the diameter direction of the buoyancy ball.

[0011] Furthermore, the water inlet and outlet mechanism includes a mounting base and a fixed base disposed within the mounting base. The fixed base is respectively provided with a clean water outlet component that forms a clean water outlet channel when pressed and a sewage inlet component that forms a sewage inlet channel when pressed. The clean water outlet component includes a water outlet pin structure that cooperates with a through hole on the fixed base, a pressure spring that causes the water outlet pin structure to be in an extended tendency, and a limiting component that limits the extended position of the water outlet pin structure. When the water outlet pin structure is pressed and moved, the water outlet pin structure and the through hole form a clean water outlet channel.

[0012] Furthermore, the water outlet pin structure includes a body and a water outlet switch component disposed on the body, and a flow hole is provided between the water outlet switch component and the body to form part of the clean water output channel.

[0013] Furthermore, a water outlet sealing structure is provided between the water outlet switch component and the limit component.

[0014] Furthermore, the water outlet sealing structure includes a sealing ring fixed in the annular mounting groove. The sealing ring has a notch, which forms a communication gap with the end of the fixing seat to constitute part of the clean water output channel.

[0015] Furthermore, the sealing ring has extensions on both sides in the vertical direction of the diameter and a protrusion in the diametrical direction, the protrusion having a sealing mating surface.

[0016] Furthermore, the sealing mating surface is an inclined plane.

[0017] Furthermore, a guide structure is provided between the fixing base and the body.

[0018] Furthermore, the guide structure includes a guide groove provided on the fixed base and a guide strip provided on the body, or a guide groove provided on the body and a guide strip provided on the fixed base, wherein the guide groove and the guide strip cooperate.

[0019] This invention relates to a handheld car washer, comprising an electric washer head and a handle connected to the electric washer head, and a water tank located on the handle for supplying water to the electric washer head and collecting wastewater. The water tank includes a tank body with a liquid storage cavity, an inlet / outlet mechanism that communicates with the storage cavity when the tank body is pressurized, and a pressure relief mechanism to maintain pressure balance within the tank. The pressure relief mechanism includes a pressure relief pipe connected to the outlet pipe, with a buoyancy component at the free end of the pipe for adjusting the air pressure inside the tank body. A flexible structure is provided between the outlet pipe and the buoyancy component on the pressure relief pipe. Because the pressure relief mechanism allows some air inside the tank to communicate with the outside through the inlet / outlet mechanism, when pressure is generated in the tank during cleaning, air can be transported to the outside along with clean water, effectively reducing the internal pressure of the tank and maintaining pressure balance. This prevents air bubbles from forming on the washer head when pressure is released from the tank during car washing. 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 diagram of an embodiment of a handheld car cleaning machine.

[0022] Figure 2 This is a cross-sectional view of a handheld car cleaning machine embodiment along its length.

[0023] Figure 3 This is a schematic diagram of the internal structure of an embodiment of a handheld car cleaning machine.

[0024] Figure 4 This is a schematic diagram of an embodiment of a handheld car cleaning machine.

[0025] Figure 5 This is a schematic diagram of the orthographic projection along the length of an embodiment of a handheld car wiping machine.

[0026] Figure 6 for Figure 5 A cross-sectional view of the water tank device embodiment along the AA direction.

[0027] Figure 7 for Figure 6 Schematic diagram of the cross-section of the structure along the BB direction.

[0028] Figure 8 for Figure 7 Enlarged schematic diagram of section C.

[0029] Figure 9 for Figure 8 Enlarged schematic diagram of section D.

[0030] Figure 10 This is an exploded structural diagram of an embodiment of the water tank device.

[0031] Figure 11 This is a schematic diagram of one of the usage states of a device containing a liquid water tank.

[0032] Figure 12 This is a schematic diagram illustrating another usage state of the device when it contains a liquid tank.

[0033] Explanation of reference numerals in the attached figures:

[0034] 2. Wiping roller; 3. Cleaning head housing; 4. Machine body; 6. Control circuit board; 7. Battery; 8. Handle.

[0035] Pump 5, Pump outlet 51, Pump return outlet 52, Water tank outlet pipe 53, Clean water pipe 54, Sewage pipe 55, Clean water output channel component 56, Sewage return channel component 57;

[0036] Water tank 1;

[0037] Water inlet / outlet mechanism 10;

[0038] Fixture 101

[0039] Clean water output component 102, inlet / outlet water pin structure 1021, body 10211, inlet / outlet water switch component 10212, flow passage 10213.

[0040] Wastewater inlet component 103, inlet / outlet pin structure 1031, body notch 10311

[0041] Mounting base 104, vent 1041, filter assembly sealing edge 1042, water suction pipe interface 1043, latch 1044, latch 1045, guide rib 1046, pressure relief interface 1047.

[0042] Sealing gasket 105

[0043] 106 water suction pipe

[0044] Top compression spring 107;

[0045] Sealing ring 108, first extension 1081, second extension 1082, protrusion 1083, notch 1084;

[0046] Water tank body 20, snap-fit ​​part 201, snap-fit ​​groove 202, upper body 206, lower body 207;

[0047] Pressure relief mechanism 30, pressure relief pipe 301, buoyancy component 302, cavity 3021, fixed end 3022, branch pipe 3023, protrusion 3024, first pressure relief port 3025;

[0048] Filter assembly 40, filter assembly connection port 401;

[0049] Liquid level H;

[0050] 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

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] like Figures 1-12 As shown, the present invention provides an embodiment of a handheld car wiping machine.

[0059] The handheld car washer includes an electric washer head and a body connected to the electric washer head, as well as a water tank 1 located on the body to supply water to the electric washer head and collect wastewater. The water tank 1 includes a water tank body 20 with a liquid storage cavity and a water inlet / outlet mechanism 10 that communicates with the storage cavity when the water tank body 20 is pressurized, and a pressure relief mechanism 30 to maintain the pressure balance of the water tank. The pressure relief mechanism includes a pressure relief pipe 301 connected to the water outlet pipe (not shown in the figure). The free end of the pressure relief pipe 301 is provided with a buoyancy component 302 that can adjust the air pressure inside the water tank body. The pressure relief pipe 301 has a flexible structure (not shown in the figure) between the water outlet pipe and the buoyancy component 302. This flexible structure can ensure that the water tank can float on the liquid surface H under the action of the buoyancy component 302 in any state, so that the part above the liquid surface H can communicate with the outside of the water tank.

[0060] Specifically, such as Figure 1 , Figure 2 As shown, the handheld car wiping machine includes a body 4, a water tank 1 that snaps onto the upper front side of the body, a cleaning head housing 3 that extends outward from the front of the body to snap onto the wiping roller 2, and a handle 8 connected to the end of the body. The cleaning mechanism (not shown in the figure) is installed inside the cleaning head housing 3. The pump 5 and part of the delivery pipeline (not shown in the figure) in the cleaning fluid delivery mechanism are installed inside the body. Part of the delivery pipeline in the cleaning fluid delivery mechanism and a section of the pipeline in the cleaning fluid delivery mechanism that passes through the wiping roller 2 are installed inside the cleaning head housing 3. The control circuit board 6, battery 7, and display panel (not shown in the figure) of the handheld car wiping machine are installed inside the handle 8. The body, cleaning head housing, and handle are all equipped with power harnesses, signal harnesses, and connectors (not shown in the figure) that provide power or sensor signal transmission to the car wiping device.

[0061] Specifically, such as Figure 3 As shown, the machine body 4 and the cleaning head housing 3 are also equipped with a water tank outlet pipe 53, a clean water pipe 54, and a sewage pipe 55. The cleaning head housing 3 is equipped with a clean water output channel component 56 and a sewage return channel component 57 at both ends. The pump 5 includes a pump outlet 51 and a pump return port 52. One end of the water tank outlet pipe 53 is connected to the clean water output interface (not shown in the figure) of the water tank 1, and the other end is connected to the pump return port 52. One end of the clean water pipe 54 is connected to the pump outlet 51, and the other end is connected to the input interface (not shown in the figure) of the clean water output channel component 56. One end of the sewage pipe 55 is connected to the output interface (not shown in the figure) of the sewage return channel component 57, and the other end is connected to the sewage input interface (not shown in the figure) of the water tank 1.

[0062] Specifically, such as Figure 6 , Figure 7 , Figure 10 , Figure 11 , Figure 12As shown, the buoyancy component 302 can employ a structure including a buoyancy ball. The buoyancy ball can release air pressure to the outside of the water tank body through the pressure relief pipe. The buoyancy ball has a branch pipe 3023, one end of which extends from the fixed end 3022 where the buoyancy ball and pressure relief pipe 301 are fixed, and a free end (not shown in the figure) flush with the buoyancy ball. The free end has a first pressure relief port 3025, and one or more protrusions 3024 are located beside the first pressure relief port 3025. These protrusions 3024 prevent the first pressure relief port 3025 from being briefly submerged below the liquid surface H and then floating up again during rapid shaking of the water tank, thus preventing the formation of a water film on the first pressure relief port 3025 and hindering its pressure relief function. The protrusions 3024 are evenly distributed around the first pressure relief port 3025. The buoyancy ball has a cavity 3021, and the branch pipe 3023 penetrates the buoyancy ball to form a closed cavity 3021. The protrusion 3024 is provided with a second pressure relief port (not shown in the attached figure) that communicates with the first pressure relief port. This second pressure relief port may be submerged in the liquid or float on the liquid surface. This design indirectly increases the total area of ​​the first and second pressure relief ports that can function, resulting in a better pressure relief effect. The branch pipe 3023 is arranged along the diameter direction of the buoyancy ball, which ensures that the first pressure relief port 3025 is as close to the liquid surface as possible.

[0063] As a further improved implementation, a filter assembly (not shown in the figure) can be detachably fixed on the multiple protrusions 3024 as fixed fulcrums. The filter assembly covers the first pressure relief port 3025 to prevent impurities in the backflowed sewage from clogging the pressure relief pipe 301 after the first pressure relief port 3025 is briefly submerged below the liquid surface H and then floats up again when the water tank shakes violently, thus hindering its pressure relief function.

[0064] Specifically, such as Figure 6 , Figure 7 , Figure 8 , Figure 9As shown, the water inlet / outlet mechanism includes a mounting base 104 and a fixed base 101 disposed within the mounting base 104. The fixed base 101 is respectively provided with a clean water output component 102 that forms a clean water output channel when pressed, and a sewage inlet component 103 that forms a sewage input channel when pressed. The clean water output component 102 includes an inlet / outlet pin structure 1021 that mates with a through hole (not shown in the figure) on the fixed base 101, a pressure spring 107 that causes the pin structure 1021 to extend, and a limiting component or structure 1011 that limits the extension position of the pin structure 1021. When the pin structure 1021 is pressed and moved, it forms a clean water channel (not shown in the figure) with the through hole. Specifically, the limiting component or structure 1011 is disposed on one side of the through hole. The inlet / outlet pin structure 1021 includes a body 10211 and an inlet / outlet switch component 10212 extending outward from the body 10211. A flow hole 10213 forming part of a clear water channel is provided between the inlet / outlet switch component 10212 and the body 10211. An inlet / outlet sealing structure is provided between the outlet switch component 10212 and the limiting component or structure 1011. The inlet / outlet sealing structure includes a sealing ring 108 fixed in an annular mounting groove (not shown in the figure). The sealing ring 108 has a notch 1084. The notch 1084 and the inner end wall of the fixing seat 101 form a communication gap, which constitutes part of the clear water channel (not shown in the figure). The sealing ring 108 has extensions on both sides in the vertical direction of diameter, namely a first extension 1081 and a second extension 1082, and a protrusion 1083 in the diametrical direction. The protrusion 1083 is located between the first extension 1081 and the second extension 1082. The protrusion 1083 has a sealing mating surface (not shown in the figure), which cooperates with the limiting component or structure 1011 to seal.

[0065] As a further improved implementation, the sealing mating surface is an inclined surface.

[0066] like Figure 7 , Figure 8 , Figure 9 As shown, when the inlet / outlet water switch component 10212 is compressed inward, the protrusion 1083 moves away from the sealing mating surface, forming a gap between the protrusion 1083 and the sealing mating surface. This gap connects to the pressure relief pipe 301 inside the water tank through the flow hole 10213. This allows both liquid and air from the water tank to be discharged, effectively reducing the internal pressure of the water tank and balancing the pressure inside and outside the tank. This prevents pressure increases within the water tank.

[0067] Specifically, such as Figure 4 , Figure 7 , Figure 8 , Figure 9As shown, the wastewater inlet assembly 103 has the same structure as the clean water outlet assembly 102, namely, it includes an inlet / outlet pin structure 1031 that mates with a through hole (not shown in the figure) on the fixed base 101, a pressure spring 107 that causes the inlet / outlet pin structure to extend, and a limiting component or structure 1011 that limits the extension position of the inlet / outlet pin structure 1031. When the inlet / outlet pin structure 1021 is pressed and moved, the inlet / outlet pin structure 1031 and the through hole form a wastewater channel (not shown in the figure). Specifically, the limiting component or structure 1011 is provided on one side of the through hole. The inlet / outlet pin structure 1031 includes a body notch 10311 with a notch and an inlet / outlet switch component 10212 extending outward from the body notch 10311. A flow hole 10213 forming part of the wastewater channel is provided between the inlet / outlet switch component 10212 and the body notch 10311. A water inlet / outlet sealing structure is provided between the water outlet switch component 10212 and the limiting component or structure 1011. This sealing structure includes a sealing ring 108 fixed in an annular mounting groove (not shown in the attached figure). The sealing ring 108 has a notch 1084, which forms a communication gap with the inner end wall of the fixing seat 101, constituting part of a sewage channel (not shown in the attached figure). The sealing ring 108 has extensions on both sides in the vertical direction of its diameter, namely a first extension 1081 and a second extension 1082. A protrusion 1083 is provided in the diametrical direction, located between the first extension 1081 and the second extension 1082. The protrusion 1083 has a sealing mating surface (not shown in the attached figure), which mates with the limiting component or structure 1011 to provide a seal. The difference between the structure of the sewage inlet component 103 and the clean water outlet component 102 is that the inlet / outlet pin structure 1031 includes a body notch 10311 with a notch, and a bypass channel with a meandering structure (not shown in the figure) is also provided in the body notch 10311. This bypass channel can still be used as part of the sewage channel.

[0068] As a further improved implementation, the sealing mating surface is an inclined surface.

[0069] It should be noted that the inlet / outlet water pin structure 1021, inlet / outlet water switch component 10212, and inlet / outlet water pin structure 1031 mentioned above can also be referred to as inlet pin structure 1021 or outlet pin structure 1021, inlet switch component 10212 or outlet switch component 10212, inlet pin structure 1031 or outlet pin structure 1031. This does not affect the understanding of the technical essence presented in the entire application by those skilled in the art. The preceding text uses neutral terms to describe the purpose of the relevant components for "inleting" or "outleting" water. Regardless of whether directional terms are used to describe the function of the component, all components mentioned above with the qualifier "inlet / outlet" actually have the function of conveying water in both directions. Any substitution of other names or transformations, modifications, or improvements to similar structures to achieve the same technical purpose or effect are within the scope of protection of this application.

[0070] As a further improved implementation, as needed, a guide structure is provided between the fixed base 101 and the body 10211 to make its extension and retraction movement more stable. The guide structure includes a guide groove (not shown in the figure) provided in the fixed base 101 and a guide strip (not shown in the figure) provided in the body 10211, or a guide groove provided in the body and a guide strip provided in the fixed base, wherein the guide groove and the guide strip cooperate.

[0071] Specifically, such as Figures 6 to 10As shown, the clean water output component 102 and the wastewater inlet component 103 of the water inlet / outlet mechanism 10 are elastically clamped between the fixed base 101 and the mounting base 104. One end of the top pressure spring 107 abuts against the water inlet / outlet pin 1021, and the other end abuts against the mounting base 104. The fixed base 101 has openings at both ends. The end with the larger opening has an outwardly expanding snap-fit ​​edge with a certain strength and thickness, featuring a flip-up interface (not shown in the figure). The end with the smaller opening is fitted onto the inner wall of the mounting base 104. The fixed base 10... A partition (not shown in the figure) is provided on the side near the large opening end to block the opening. The partition has a conical through hole that abuts against the inlet / outlet water ejector pin 1021. A sealing gasket 105 is sandwiched between the small opening end face of the fixing seat 101 and the inner bottom wall of the mounting seat 104. The sealing gasket 105 is made of elastic material. After the fixing seat 101 and the mounting seat 104 are detachably connected by fastening screws, the elastic sealing gasket 105 can fill the gap between the two to effectively prevent leakage. The outer walls of the large opening end and the small opening end of the fixing seat 101 maintain two different outer diameters. The outer wall of the fixing seat 101 must have a step (not shown in the figure) that divides the large opening end and the small opening end. A sealing ring (not shown in the figure) is sleeved on the outer wall of the large opening end of the fixing seat 101 extending to the step. This sealing ring can seal the gap after the water inlet / outlet mechanism 10 and the water tank body 20 are engaged.The mounting base 104 is open at one end, and the open end is fitted onto the fixing base 101. The other end is closed, but a through hole (not shown in the figure) is provided on the closed end face to communicate with the clean water output component 102 and the wastewater inlet component 103. A water suction pipe interface 1043 extends outward from the through hole of the clean water output component 102 on the closed end face of the mounting base 104. A water suction pipe 106 for drawing water from the water tank body 20 is fitted onto the water suction pipe interface 1043. Around the water suction pipe interface 1043, a semi-elliptical filter assembly sealing edge 1042 extends outward from the closed end face of the mounting base 104. Two buckles 1044 are provided next to the straight edge of the semi-elliptical filter assembly sealing edge 1042. A buckle 1045 with barbs extends outward from the elliptical arc side of the straight edge of the semi-elliptical filter assembly 1042. A filter assembly connection port 401 at one open end of a cylindrical filter assembly 40 with a semi-elliptical cross-section is detachably coupled to the filter assembly sealing eave 1042. The filter assembly 40 is provided with buckles (not shown in the figure) corresponding to buckles 1044 and 1045. A pressure relief port 1047 is provided on the closed end face of the mounting base 104 and outside the ring of the filter assembly sealing eave 1042. The end of the pressure relief pipe 301 that is not connected to the buoyancy component 302 is sleeved on the pressure relief port 1047. The peripheral wall and bottom wall of the filter assembly 40 are provided with multiple hollow structures (not shown in the figure), and its outer surface is covered with a filter screen (not shown in the figure). A water suction pipe 106 is fitted onto the water suction pipe interface 1043. The water suction pipe 106 extends to a region close to the bottom wall of the filter assembly 40. This allows the water filtered in the filter assembly 40 inside the handheld car washer 1 to still be drawn in by the water suction pipe 106 when the water inlet / outlet mechanism 10 is facing upwards. This drawable state is maintained until the water level of the filtered water in the filter assembly 40 is lower than the lowest opening of the water suction pipe 106 (not shown in the figure). Outside the sealing eaves 1042 of the filter assembly on the closed end face of the mounting base 104, there is a sewage return port (not shown in the figure) that communicates with the sewage inlet assembly 103. The sewage after cleaning by the cleaner enters the cavity inside the handheld car wash machine 1 through the return channel and then through the sewage return port 1045. After being filtered by the filter assembly 40, the sewage is sucked into the clean water channel through the suction pipe 106 and finally sent out to the water outlet passage of the cleaner (not shown in the figure) through the clean water output assembly 102.A vent 1041 is provided inside the sealing eaves 1042 of the filter assembly on the closed end face of the mounting base 104. When the water inlet / outlet mechanism 10 is facing upward and the pressure relief mechanism 30 loses its pressure regulating function, the handheld car washer 1 still has a pressure relief channel to slightly adjust the gas pressure inside and outside the pressure relief water tank device. When the water inlet / outlet mechanism 10 is facing downward and the water level in the filter assembly 40 is lower than the highest opening of the water suction pipe 106, water can still enter the clean water channel through the vent 1041 and then be sent out to the water outlet passage of the cleaner (not shown in the figure) through the clean water output assembly 102. A guide rib 1046 is provided on the outer wall of the mounting base 104 that mates with the water tank body 20. The guide rib 1046 helps the installed water inlet / outlet mechanism 10 to be easily inserted into the water tank body 20. Since the outer wall of the water inlet / outlet mechanism 10 that mates with the water tank body 20 has a regular symmetrical shape, the guide rib 1046 can also play a role in preventing reverse connection.

[0072] Specifically, the water tank body 20 includes an upper water tank body (not shown in the attached drawing) and a lower water tank body (not shown in the attached drawing). The upper water tank body and the lower water tank body are connected by a sealed connection. One side of the bottom of the lower water tank body extends upwards and is sloped (not shown in the attached drawing). The top end of the sloped surface, opposite to the water inlet / outlet mechanism 10, is provided with a concave snap-fit ​​part 201 for easy installation and fixing. This snap-fit ​​part is provided with a concave snap-fit ​​groove 202. When fixing the water tank 1, the corresponding buckle on the cleaner can be engaged in the snap-fit ​​groove 202 of the snap-fit ​​part 201. When it is necessary to remove the water tank 1, the corresponding buckle can be released to remove the water tank 1.

[0073] As a further improved implementation, the upper body and lower body of the water tank are sealed together by an ultrasonic welding layer (not shown in the figure).

[0074] As a further improved implementation, the upper body and lower body of the water tank are sealed together through a secondary injection molding process.

[0075] As a further improved implementation, the upper body and lower body of the water tank are sealed together by a direct bonding process.

[0076] Specifically, such as Figure 11As shown, when the water inlet / outlet mechanism 10 of the handheld car wash machine's water tank is tilted downwards, a portion of the pressure relief mechanism 30 on the side away from the water inlet / outlet mechanism 10 is above the liquid surface H. Regardless of whether the opening of the suction pipe 106 is always below the liquid surface H, the pressure relief water tank device 1 still has the ability to release pressure to the outside of the pressure relief water tank device and also has the ability to continuously output clean water. When the inlet of the suction pipe 106 is below the liquid surface H, the suction pipe 106 can naturally achieve the function of "discharging water outwards". When the inlet of the suction pipe 106 is above the liquid surface H, the vent 1041 of the water inlet / outlet mechanism 10 is lower than the liquid surface H and is only a very small bypass branch of the water outlet channel 1024. The bypass branch of the vent 1041 can achieve the function of "discharging water outwards" under the pressure of the liquid surface H. At the same time, due to the pressure difference between the inside and outside of the water tank of the handheld car wash machine, the handheld car wash machine used in this posture has the ability to supply water to the outside and release pressure to the outside.

[0077] Specifically, such as Figure 12 As shown, when the water inlet / outlet mechanism 10 of the handheld car wash machine's water tank is tilted upwards, a portion of the pressure relief mechanism 30 is located above the liquid surface H on the side closest to the water inlet / outlet mechanism 10. At this time, the opening of the suction pipe 106 is lower than the liquid surface H. Under the combined action of water pressure and air pressure, the pressure is released directly to the outside of the handheld car wash machine 1 through the pressure relief mechanism 30 and along the pressure relief pipe. Simultaneously, the vent 1041 of the water inlet / outlet mechanism 10 is higher than the liquid surface H and is merely a very small bypass branch of the water outlet channel 1024. The vent 1041 is connected to the outside atmosphere. A circuitous structure (not shown in the attached diagram) is provided before the vent 1041 to block the flow of water to the bypass branch of the vent 1041. Simply put, the bypass branch of the vent 1041, which is connected to the outside atmosphere, can achieve the effect of "breathable but not water-permeable". At this time, the bypass branch of the vent 1041, which communicates with the outside atmosphere, has the ability to release pressure to the outside of the water supply device. Simultaneously, due to the pressure difference between the inside and outside of the handheld car washer's water tank, and because the suction pipe 106 always has a water inlet and / or suction hole (not shown in the attached diagram) below the liquid level H, the clean water output component can continuously output clean water. Using this configuration, the handheld car washer has the ability to release pressure to the outside of the water tank and continuously output clean water. Of course, when the liquid level H is lower than the water inlet of the suction pipe 106, the handheld car washer's water tank will not be able to continuously output clean water. In this case, the user is reminded to add clean water to the handheld car washer's water tank to continue using the handheld car washer.

[0078] 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 handheld car washing machine, characterized in that, include: Electric scrubbing head; The main body is connected to the electric scrubbing head; A water tank, located on the machine body, supplies water to the electric scrubbing head and collects wastewater. It includes a water tank body with a storage cavity, an inlet / outlet mechanism connected to the storage cavity when the water tank body is pressurized, and a pressure relief mechanism to maintain pressure balance in the water tank. The storage cavity contains liquid. The pressure relief mechanism includes a pressure relief pipe connected to the inlet / outlet mechanism. The free end of the pressure relief pipe has a buoyancy component that can adjust the air pressure inside the water tank body. A flexible structure is provided between the inlet / outlet mechanism and the buoyancy component. The buoyancy component includes a buoyancy ball, which releases air pressure outside the water tank body through the pressure relief pipe. The buoyancy ball has a branch pipe, which includes a fixed end extending from the buoyancy ball and fixed to the pressure relief pipe, and a free end flush with the buoyancy ball. The free end has a first pressure relief port, and one or more protrusions are provided next to the first pressure relief port to prevent liquid from entering the first pressure relief port.

2. The handheld car washing machine as described in claim 1, characterized in that, The protrusions are evenly distributed around the first pressure relief port.

3. The handheld car washing machine as described in claim 1, characterized in that, The protrusion prevents the first pressure relief port from being briefly submerged below the liquid surface and then floating up again when the water tank shakes violently, thus preventing the formation of a water film on the first pressure relief port and hindering its pressure relief function.

4. The handheld car washing machine as described in claim 1, characterized in that, Multiple protrusions detachably secure a filter assembly, which covers the first pressure relief port.

5. The handheld car washing machine as described in claim 1, characterized in that, The buoyancy ball has a cavity, and the branch pipe passes through the buoyancy ball to form a closed cavity.

6. The handheld car washing machine as described in claim 1, characterized in that, The protrusion is provided with a second pressure relief port that communicates with the first pressure relief port. The second pressure relief port may be submerged in the liquid or may float on the surface of the liquid.

7. The handheld car washing machine as described in claim 1, characterized in that, The branch pipes are installed along the diameter of the buoyancy ball.

8. The handheld car washing machine as described in claim 1, characterized in that, The water inlet and outlet mechanism includes a mounting base and a fixed base located within the mounting base. The fixed base is provided with a clean water outlet component that forms a clean water outlet channel when pressed and a sewage inlet component that forms a sewage inlet channel when pressed. The clean water outlet component includes a water outlet pin structure that mates with a through hole on the fixed base, a pressure spring that causes the water outlet pin structure to extend, and a limiting component that limits the extension position of the water outlet pin structure. When the water outlet pin structure is pressed and moved, the water outlet pin structure and the through hole form a clean water outlet channel.

9. The handheld car washing machine as described in claim 8, characterized in that, The water outlet pin structure includes a main body and a water outlet switch component located on the main body. A flow hole is provided between the water outlet switch component and the main body to form part of the clean water output channel.

10. The handheld car washing machine as described in claim 9, characterized in that, A water outlet sealing structure is provided between the water outlet switch component and the limit component.

11. The handheld car washing machine as described in claim 10, characterized in that, The water outlet sealing structure includes a sealing ring fixed in an annular mounting groove. The sealing ring has a notch, which forms a communication gap with the end of the fixed seat to form part of the clean water output channel.

12. The handheld car washing machine as described in claim 11, characterized in that, The sealing ring has extensions on both sides in the vertical direction of the diameter and a protrusion in the diameter direction, which has a sealing mating surface.

13. The handheld car washing machine as described in claim 12, characterized in that, The sealing mating surface is an inclined plane.

14. The handheld car washing machine as described in claim 9, characterized in that, A guide structure is provided between the fixed base and the main body.

15. The handheld car washing machine as described in claim 14, characterized in that, The guiding structure includes a guide groove provided on the fixed base and a guide bar provided on the body, or a guide groove provided on the body and a guide bar provided on the fixed base, wherein the guide groove and the guide bar cooperate.

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