Sewage backflow pressure relief mechanism, cleaning head mechanism and scrubber

Abstract

The application discloses a sewage backflow pressure relief mechanism for a scrubber, which is arranged on a cleaning head shell and comprises a sewage guide channel and an exhaust channel arranged on the left side wall of the cleaning head shell. The sewage guide channel guides the sewage squeezed out from a cleaning roller into a sewage cavity of a water tank. The exhaust channel is provided with an exhaust port at the tail end. The exhaust channel is communicated with the sewage guide channel through a sewage inlet of the water tank. The sewage guide channel, the sewage inlet, the exhaust channel and the exhaust port are sequentially communicated, so that the air in the sewage cavity is guided to the outer surface of the cleaning roller. The exhaust channel surrounds the sewage guide channel, and the two channels form a complete sewage guide and exhaust channel. The sewage leakage of the side wall of the cleaning head mechanism is prevented, and the convenience of the user in regularly maintaining the sewage guide and exhaust channel is improved. The application further discloses a cleaning head mechanism and a scrubber provided with the sewage backflow pressure relief mechanism.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cleaning equipment, in particular to a sewage backflow pressure relief mechanism, a cleaning head mechanism and a scrubber. BACKGROUND

[0002] At present, the scrubbers on the market are mainly divided into air-dust scrubbers and water-dust circulating scrubbers according to technical routes. The cleaning head of the water-dust circulating scrubber is provided with a roller assembly for scrubbing the ground, a water squeezing device for squeezing the outer surface of the roller assembly, and a water flow pipeline for delivering clean water to the outer surface of the roller assembly and collecting sewage into a sewage tank. In the half of the water flow pipeline after passing through the outer surface of the roller assembly, the sewage collection pipeline is a long and narrow side wall passage connected between the outer surface of the roller assembly and the sewage inlet of the sewage tank, which is attached to one end of the side wall of the cleaning head housing. When a large amount of cleaning liquid is sprayed on the ground or a large amount of cleaning liquid is added to the clean water tank, a large amount of foam mixed with bubbles will be generated at the sewage collection end of the water flow passage of the water-dust circulating flow after the outer surface of the roller assembly is squeezed by the water squeezing device. These foam mixed with bubbles hinders the flow efficiency of the sewage, and also easily flows along the gap of the side wall of the cleaning head of the scrubber to the ground that has been cleaned, resulting in low ground cleaning efficiency and easy wet slip. SUMMARY

[0003] In order to further reduce the foam mixed with bubbles generated at the sewage collection end of the water flow passage of the water-dust circulating flow after the outer surface of the roller assembly is squeezed by the water squeezing device when a large amount of cleaning liquid is sprayed on the ground or a large amount of cleaning liquid is added to the clean water tank, and to further prevent the foam-shaped cleaning liquid from leaking through the gap of the side wall of the cleaning head of the scrubber to the ground that has been cleaned, the present application provides a sewage backflow pressure relief mechanism, a cleaning head mechanism and a scrubber.

[0004] In a first aspect, the present application provides a sewage backflow pressure relief mechanism arranged on a cleaning head housing, characterized in that it comprises:

[0005] A sewage guide channel is arranged on the left side wall of the cleaning head housing to guide the sewage squeezed out from the cleaning roller into the sewage cavity of the water tank which can be inserted or extracted horizontally into the rear end of the cleaning head housing;

[0006] An exhaust channel with an exhaust port at the end is arranged on the left side wall to communicate the sewage guide channel with the sewage inlet of the water tank;

[0007] The sewage guide channel, the sewage inlet, the exhaust channel and the exhaust port are sequentially communicated to guide air in the sewage cavity to be discharged to the outer surface of the cleaning roller; a pressure regulating device for regulating the pressure difference between the inside and outside can be arranged at the exhaust port; the exhaust channel surrounds the sewage guide channel, and the two form a complete sewage guide and exhaust channel.

[0008] In one or some optional embodiments, a floating ball assembly with a magnetic sheet rotating at a fixed point is arranged in the sewage cavity, and a Hall sensor is arranged on the left side wall in a region corresponding to the magnetic sheet.

[0009] In one or some optional embodiments, the exhaust port is arranged on the left side wall in a region corresponding to the outer surface of the cleaning roller.

[0010] In one or some optional embodiments, the sewage backflow pressure relief mechanism further comprises a gas dispersion channel arranged on an integral beam of the two side walls of the cleaning head housing, and the exhaust port is communicated with the exhaust channel and the gas dispersion channel.

[0011] In one or some optional embodiments, the sewage backflow pressure relief mechanism further comprises a side edge cover assembly arranged on the left side wall of the sealing cover for blocking the sewage guide and exhaust channel.

[0012] In one or some optional embodiments, a flange forming a closed ring is arranged on the left side wall, and a first weir connecting the flange and forming a closed inner ring is further arranged in the closed ring on the left side wall, and the closed inner ring surrounds the sewage guide and exhaust channel.

[0013] In one or some optional embodiments, a flange forming a closed ring is arranged on the left side wall, and a first weir independently forming a closed inner ring is further arranged in the closed ring on the left side wall, and the closed inner ring surrounds the sewage guide and exhaust channel.

[0014] In one or some optional embodiments, the first weir is in a U shape, and the two ends of the first weir are connected to the inner wall of the flange.

[0015] In one or some optional embodiments, the water tank is an integral water tank, and the end portion of the left side wall is provided with a clean water outlet and a sewage inlet, one end of the sewage guide channel is communicated with the sewage outlet of the cleaning tank, and the other end of the sewage guide channel is communicated with the sewage inlet, and one end of the exhaust channel is communicated with the exhaust port, and the other end of the exhaust channel is communicated with the sewage inlet.

[0016] In one or some optional embodiments, a sewage backflow port is arranged on the left side wall in the sewage guide channel and communicated with the sewage inlet; and an exhaust outlet is arranged on the left side wall in the exhaust channel and communicated with the sewage inlet.

[0017] In one or some optional embodiments, a retractable sewage valve core is arranged at the sewage inlet of the water tank.

[0018] In one or some optional embodiments, a second weir is arranged on the left side wall within the closed ring to form a small closed ring and enclose the sewage guiding channel.

[0019] In one or some optional embodiments, a second weir is arranged on the left side wall within the closed ring to form a small closed ring with the first weir and enclose the sewage guiding channel, the second weir extends forward in the same direction and parallel to the horizontal side of the first weir after wrapping around the sewage outlet, and then converges with the horizontal side of the first weir after wrapping around the sewage outlet.

[0020] In one or some optional embodiments, the back of the upper flat side of the second weir is provided with an abutting port, which elastically abuts against the sewage valve core at the sewage inlet, and simultaneously opens the sewage guiding channel and the exhaust channel when the water tank is inserted into the cleaning head shell and installed in place.

[0021] In one or some optional embodiments, the pressure regulating device is an electromagnetic valve.

[0022] In a second aspect, the embodiments of the present application further provide a cleaning head mechanism, characterized in that, comprising:

[0023] a cleaning head shell, the upper part of the two side walls of the front end of which is open, and a sewage backflow pressure relief mechanism as described in the first aspect is arranged thereon;

[0024] a cleaning roller and brush assembly, which is clamped between the two side walls of the front end of the cleaning head shell;

[0025] a water tank, which can be inserted or extracted transversely from the rear end of the cleaning head shell;

[0026] a detachable upper cover, which covers the open part of the cleaning roller and brush assembly clamped between the two side walls of the front end of the cleaning head shell.

[0027] In a third aspect, the embodiments of the present application further provide a scrubber, which comprises a cleaning head mechanism as described in the second aspect and a handle matched with the cleaning head mechanism, the handle is installed on the handle installation part of the cleaning head mechanism, and a control system is arranged in the handle to control the pressure regulating device according to the signal of the Hall sensor.

[0028] The above technical solutions provided by the embodiments of the present application have at least the following beneficial effects:

[0029] The sewage backflow pressure relief mechanism provided by the embodiment of the present application can prevent the air pressure and the cleaning liquid mixed with bubbles and foam discharged to the outside from leaking through the side wall when the sewage is guided to the sewage cavity of the integrated water tank through the sewage guiding channel of the sewage backflow pressure relief mechanism. Even if the sewage guiding channel does not have enough space to defoam the residual cleaning liquid mixed with bubbles and foam in the sewage, the cleaning liquid mixed with bubbles and foam can flow into the sewage cavity along the sewage guiding channel. The air pressure in the sewage cavity can be discharged through the exhaust channel opened by the abutting port arranged on the back of the second weir, and the cleaning liquid mixed with bubbles and foam in the sewage cavity can continue to defoam by itself until the pressure inside and outside the sewage cavity is balanced, and all the bubbles are naturally dispersed. The left side wall of the cleaning head housing body is sealed by the side cover assembly of the sewage backflow pressure relief mechanism, and the two channels of the sewage guiding channel and the exhaust channel are dredged and water is guided and the pressure is discharged to the outside, which improves the convenience of the user to regularly maintain the sewage guiding and exhaust channel. After the air in the sewage cavity passes through the exhaust channel, there are two paths to discharge the air to the outside. The first path is that the air to be discharged can be discharged to the exhaust port through the exhaust channel and then continue to flow along the air dispersion channel to the space between the air dispersion channel and the upper surface of the cleaning roller. The second path is that the air to be discharged can be discharged to the exhaust port through the exhaust channel, and then to the gap space between the upper surface of the cleaning roller and the detachable cover outside the air dispersion channel after passing through the air dispersion port. The further exhaust path after the two exhaust channels further improves the efficiency of the sewage backflow pressure relief mechanism in discharging the air in the sewage cavity to the outside, and also improves the sewage flow efficiency of the sewage guiding channel.

[0030] The cleaning head mechanism with the sewage backflow pressure relief mechanism provided by the embodiment of the present application can realize self-defoaming of the cleaning liquid mixed with bubbles and foam in the sewage channel inside the cleaning head mechanism of the scrubber, increase two paths to discharge the air in the sewage cavity to the outside, improve the efficiency of the sewage backflow pressure relief mechanism in discharging the air in the sewage cavity to the outside, and also improve the sewage flow efficiency of the sewage guiding channel, prevent the side wall of the scrubber head from leaking liquid, and also improve the convenience of the user to regularly maintain the sewage guiding and exhaust channel.

[0031] The cleaning head mechanism with the sewage backflow pressure relief mechanism and the handle matched with the cleaning head mechanism are provided with a control system, which can control the pressure regulating device arranged in the sewage backflow pressure relief mechanism according to the signal of the Hall sensor in the sewage cavity, so as to ensure the smoothness of the exhaust passage or prevent the odor in the sewage cavity from being discharged outward along the exhaust passage. Meanwhile, the control system of the cleaning machine can also open or close the electromagnetic valve arranged at the exhaust port in time according to the signal of whether the clean water in the clean water cavity is short of water transmitted by the flow sensor arranged on the water conveying pipeline, so as to ensure the smoothness of the exhaust passage or prevent the sewage in the sewage cavity from splashing along the exhaust passage to the upper surface of the cleaning roller, and the user experience is improved.

[0032] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the application. The objects and other advantages of the present application can be achieved and obtained by means of the structure particularly pointed out in the written description and the appended drawings.

[0033] The technical solutions of the present application will be further described in detail below with the help of the drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0034] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, illustrate the present application, and explain the technical solutions of the present application, and do not constitute a limitation on the present application. In the drawings:

[0035] Figure 1 The structure diagram of the cleaning head mechanism with the sewage backflow pressure relief mechanism of the present application is shown.

[0036] Figure 2 The perspective view of the water tank matched with the cleaning head shell of the cleaning head mechanism with the sewage backflow pressure relief mechanism of the present application is shown.

[0037] Figure 3 The exploded view of the cleaning head mechanism with the sewage backflow pressure relief mechanism of the present application is shown.

[0038] Figure 4 The partial enlarged view of A in the figure is shown. Figure 3

[0039] Figure 5 The partial enlarged view of J in the figure is shown. Figure 3

[0040] Figure 6 The perspective view of another embodiment of the cleaning head mechanism with the sewage backflow pressure relief mechanism of the present application is shown. Figure 5

[0041] Figure 7 The perspective view of another embodiment of the cleaning head mechanism with the sewage backflow pressure relief mechanism of the present application is shown.

[0042] ​​​Figure 8 for Figure 7 Enlarged view of a section at point C.

[0043] Figure 9 A perspective view of another embodiment of the cleaning head mechanism of the wastewater return pressure relief mechanism of the present invention.

[0044] Figure 10 for Figure 9 Enlarged view of a section at point D.

[0045] Figure 11 A perspective view of the cleaning head housing body of the wastewater return pressure relief mechanism of the present invention.

[0046] Figure 12 for Figure 11 Planar view along the G direction.

[0047] Figure 13 This is a perspective view of the side cover assembly of the sewage return pressure relief mechanism of the present invention.

[0048] Figure 14 This is a front view of the side cover assembly of the sewage return pressure relief mechanism of the present invention.

[0049] Figure 15 for Figure 14 Planar view along line E.

[0050] Figure 16 for Figure 14 Planar view along the F direction.

[0051] Figure 17 Another embodiment of the cleaning head machine configured with the wastewater return pressure relief mechanism of the present invention is as follows: Figure 3 Enlarged view of a portion of point A in the middle.

[0052] Figure 18 This is a perspective view of another embodiment of the side cover assembly of the sewage return pressure relief mechanism of the present invention.

[0053] Figure 19 Another embodiment of the side cover assembly for configuring the wastewater return pressure relief mechanism of the present invention is as follows: Figure 14 Planar view along line E.

[0054] Figure 20 Another embodiment of the side cover assembly for configuring the wastewater return pressure relief mechanism of the present invention is as follows: Figure 14 Planar view along the F direction.

[0055] Figure label:

[0056] 1 is the water tank, 10 is the water tank body, 10c is the water tank partition, 11 is the clean water outlet, and 12 is the sewage inlet;

[0057] 2 is the cleaning head shell, 21 is the clean water suction pipe, and 22 is the clean water delivery pipe;

[0058] 20 is the cleaning head shell body, 201 is the left flange of the shell, 202 is the first weir, 203 is the second weir, 204 is the sewage outlet, 204a is the first sewage outlet, 204b is the second sewage outlet, 205 is the sewage return outlet, 206 is the exhaust outlet, 207 is the exhaust port, 208 is the air diffusing channel, and 209 is the air diffusing port;

[0059] 21 is the clean water suction pipe, and 22 is the clean water delivery pipe;

[0060] 3 is the detachable upper cover;

[0061] 4 is the roller;

[0062] 5 is the cleaning roller;

[0063] 6 is the side cover assembly, 60 is the side cover body, 60a is the handle chamfered edge, 601 is the first weir, 602 is the second weir, 601a is the first weir sealing ring, and 602a is the second weir sealing ring;

[0064] M is the exhaust channel, and N is the sewage guide channel.

[0065] S is the floating ball assembly, S1 is the induction magnetic sheet, and S2 is the Hall sensor. DETAILED DESCRIPTION

[0066] Exemplary embodiments of the present disclosure will be described in greater detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0067] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "far", "near", "front", "back", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0068] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, and can be internal communication of two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0069] Applicant's patent application numbers CN202123103793.4 and CN202111512775.3 disclose a water dust circulating cleaning head and a cleaning tool, wherein the cleaning head includes a shell and a cleaning roller arranged on the shell and locally in contact with the cleaning surface to clean garbage. The cleaning head further includes a cleaning roller arranged in parallel with the cleaning roller to clean the surface of the cleaning roller, a pressing strip and a water sealing strip are arranged along the length direction of the cleaning roller, the pressing strip and the water sealing strip are in contact with the surface of the cleaning roller to form a sealed cleaning tank, the cleaning tank is provided with a clean water inlet communicated with a clean water tank and a sewage outlet communicated with a sewage tank, a transfer filter bin is arranged between the sewage tank and the cleaning tank, and the cleaning tank, the transfer filter bin and the sewage tank form a water washing flow path for cleaning the surface of the cleaning roller. During cleaning, the transfer filter bin arranged in the water washing flow path can avoid the phenomenon of uneven and discontinuous water amount in the cleaning tank caused by air existing in the water washing flow path, and improve the cleaning effect. As shown in Figure 7 、 Figure 10 The shell of the cleaning head is provided with a transfer filter bin 160 and a water tank. The water tank is a semi-closed frame type water tank structure arranged on the side of the cleaning roller. The open end of the water tank 195 is connected with the pressing water rod 120 and the water sealing strip 130 shown in Figure 3 The pressing water plate and the water sealing strip, the surface of the cleaning roller 110 form a water storage space communicated with the water tank, the sewage squeezed out of the cleaning roller 110 is gathered and drained to the water storage space, and then gathered to the transfer filter bin 160 through the water tank.

[0070] The inventor found through continuous improvement and testing that, on the one hand, in the split water tank scheme of the scrubber, for example, the technical solutions disclosed in the patents with application numbers CN202123103793.4 and CN202111512775.3 of the applicant, the water tank on the side of the cleaning head of the scrubber collects sewage into the transfer filter bin, which can indeed filter the garbage in the sewage and defoam the residual cleaning liquid in the sewage through the filter hole, thereby avoiding the problem that the foam with air bubbles in the sewage hinders the flow efficiency of the sewage. However, in the case that the entire space of the cleaning head of the scrubber is very limited, arranging the transfer filter bin will increase the volume of the cleaning head invisibly, and the limited living space required for placing the scrubber will be occupied more, so the user needs to manually push or pull the cleaning head of the scrubber with a larger volume when using the scrubber. On the other hand, in the scheme of arranging an integrated water tank in the cleaning head of the scrubber, the additional transfer filter bin will occupy the space for containing clean water or sewage in the water tank.

[0071] Based on this, the present application provides a sewage backflow pressure relief mechanism, a cleaning head mechanism and a scrubber to solve the problem that the foam with air bubbles in the sewage backflowing to the sewage tank hinders the flow efficiency of the sewage, and at the same time, the space for containing clean water or sewage in the water tank is not changed. The following will be described in detail through specific embodiments.

[0072] The scheme of the present application will be described in detail below with reference to the accompanying drawings.

[0073] In a first aspect, referring to Figure 1 , Figure 3 , Figure 4 , the present application provides a sewage backflow pressure relief mechanism for a scrubber, which is arranged on a cleaning head shell 2, the cleaning head shell 2 includes a cleaning head shell body 20, and is used to guide the sewage squeezed out from a cleaning roller 5 to backflow into a water tank 1. The sewage backflow pressure relief mechanism includes a sewage guide channel N and an exhaust channel M arranged on the left side wall (not marked in the drawing) of the cleaning head shell body 20. The sewage guide channel N guides the sewage into a sewage cavity (not marked in the drawing) of the water tank 1. The exhaust channel M is provided with an exhaust port 207 at the end. The exhaust channel M communicates with the sewage guide channel N through a sewage inlet 12 of the water tank 1. The sewage guide channel, the sewage inlet, the exhaust channel and the exhaust port are sequentially communicated, and are used to guide the air in the sewage cavity to be discharged to the outer surface of the cleaning roller 5. An pressure regulating device (not marked in the drawing) for regulating the pressure difference between the inside and outside can be arranged at the exhaust port 207. The exhaust channel surrounds the sewage guide channel, and the two form a complete sewage guide and exhaust channel.

[0074] Further, as shown in Figure 4As shown, the region in the exhaust passage M corresponding to the outer surface of the cleaning roller 5 is provided with an exhaust port 207, which is used to exhaust air when the sewage is guided into the sewage cavity.

[0075] Further, as shown in Figure 3 , Figure 5 , Figure 6 the sewage backflow pressure relief mechanism further comprises a side cover assembly 6 for blocking the sewage-guiding exhaust passage, so as to prevent the air pressure and the foam cleaning liquid mixed with air bubbles from leaking outwards when the sewage is guided into the sewage cavity.

[0076] Further, as shown in Figure 3 , Figure 4 the cleaning head housing body 20 is provided with two side walls, and the front end upper portion of the cleaning head housing body 20 is provided with a cleaning tank (not shown in the figure) connected to the two side walls. One end of the cleaning tank faces the outer surface of the cleaning roller 5, and is provided with a wringing strip (not shown in the figure) in elastic abutment with the outer surface of the cleaning roller 5. The other region of the end, other than the wringing strip, is provided with a filter device (not shown in the figure) which is an integral part of the entire cleaning tank. The cleaning tank is in communication with the two side walls of the cleaning head housing body 20. The left side wall of the two side walls is provided with a first sewage outlet 204a and a second sewage outlet 204b in communication with the cleaning tank, and the right side wall of the two side walls is provided with a clean water outlet (not shown in the figure). When the scrubber works, the cleaning roller 5 rotates, and clean water is sent out from the clean water outlet and penetrates into the wiping layer of the outer surface of the cleaning roller 5 through the filter device. The clean water on the outer surface of the cleaning roller 5 is converted into sewage after being pressed by the wringing strip and then flows into the sewage-guiding exhaust passage through the first sewage outlet 204a and the second sewage outlet 204b along the channel of the cleaning tank.

[0077] Embodiment one:

[0078] In this embodiment, as shown in Figures 1 to 4As shown, the front end of the cleaning head shell body 20 is clamped with a cleaning roller 5 and a brush assembly (not shown in the figure) on both sides of the wall, the middle and rear end of the cleaning head shell body 20 is provided with a water tank 1 which can be inserted and extracted transversely, the water tank 1 is an integrated water tank, the upper part of the front end of the cleaning head shell body 20 between the two side walls clamped with the cleaning roller 5 and the brush assembly is open, the open part is covered with a detachable upper cover 3, after the detachable upper cover 3 is removed, the user can conveniently disassemble and maintain the cleaning roller 5 and the brush assembly, the clean water provided by the integrated water tank 1 can wet the wiping layer on the outer surface of the cleaning roller, so that the wiping layer can clean the ground. The integrated water tank 1 is connected with the cleaning roller 5 through a water conveying pipeline, the water conveying pipeline includes a clean water suction pipe 21 which sucks clean water from the clean water outlet 11 of the integrated water tank and a clean water conveying pipe 22 which conveys clean water to the cleaning groove on the surface of the cleaning roller, the other end of the clean water suction pipe 21 is connected with the suction port of a water pump (not shown in the figure), the other end of the clean water conveying pipe 22 is connected with the water outlet of the water pump. The left side wall of the cleaning head shell body 20 is provided with a clean water outlet 11 and a sewage inlet 12 at the end portion, the left side wall of the cleaning head shell body 20 is further provided with a sewage guide channel N which is used for recovering sewage on the surface of the cleaning roller, the sewage guide channel N is a part of the sewage guide exhaust channel which is specially used for guiding sewage, the part of the sewage guide exhaust channel after the sewage guide channel N is all exhaust channel M, one end of the sewage guide channel N is communicated with the sewage outlet 204 of the cleaning groove, the other end of the sewage guide channel N is communicated with the sewage return port 205 which is communicated with the sewage cavity of the integrated water tank 1, the sewage return port 205 is communicated with the sewage inlet 12 of the integrated water tank 1. The left side wall is provided with an exhaust port 207 in the exhaust channel M corresponding to the area of the outer surface of the cleaning roller 5.

[0079] In this embodiment, as Figure 3 、 Figure 4As shown, the left side wall of the cleaning head housing 20 has a flange 201 forming a closed ring. Near the area of ​​the left side wall that mates with the removable top cover 3, there is also a first bulge 202 whose two ends are closedly connected to the flange 201. The flange 201 extends outward from the housing at the same height as the first bulge 202. The upper part of the flange 201 and the U-shaped first bulge 202 together form a straight-walled ring. The left side wall of the cleaning head housing 20, this straight-walled ring, The inner wall of the side cover assembly 6 together forms the entire sewage discharge channel; inside the straight wall ring, a second convex weir 203 is provided, which forms a complete straight inner ring by itself. The height of the second convex weir 203 is lower than that of the flange 201 and the first convex weir 202. The second convex weir 203 forms a straight inner ring smaller than the aforementioned straight wall ring within the entire sewage discharge channel. The left side wall of the cleaning head housing body 20, the straight inner ring, and the inner wall of the side cover assembly 6 together form the sewage discharge channel N.

[0080] Specifically, refer to Figure 5 , Figure 6 As shown, the side cover assembly 6 seals and covers the side wall of the cleaning head housing 2. When the integrated water tank 1 is inserted into the cleaning head housing 2 and installed in place, the back of the left end of the upper straight edge of the second convex weir 203 of the left side wall of the cleaning head housing body 20, which connects the exhaust channel M and the sewage channel N, elastically abuts against the sewage valve core (not shown in the figure) of the sewage inlet 12 of the integrated water tank 1. This abutment simultaneously opens the sewage channel through which sewage flows from the sewage outlet 204 through the sewage channel N and then through the sewage return outlet 205 into the sewage inlet 12 and into the sewage chamber. At the same time, this abutment also opens another exhaust channel outside the left side wall of the cleaning head housing body 20 when the air in the sewage chamber is discharged after the sewage enters the sewage chamber, which connects to the exhaust outlet 206 through the exhaust channel M and then through the exhaust outlet 207. Figure 7 , Figure 8As shown, the other exhaust passage outside the left side wall of the cleaner head housing body 20 can be a gas dispersion passage 208 arranged in parallel with the cleaning tank. The air discharged from the sewage cavity along the exhaust passage M is discharged into the gas dispersion passage 208 through the exhaust port 207, and the pores of the sponge layer on the upper surface of the cleaning roller 5 can just absorb the air discharged from the sewage cavity. In this way, when the sewage flows into the sewage cavity of the integrated water tank 1 along the sewage guide channel N, even if the sewage guide channel N does not have enough space to defoam the cleaning liquid with foam mixed with bubbles in the sewage, the cleaning liquid with foam mixed with bubbles can flow into the sewage cavity along the sewage guide channel N, because the exhaust passage M is open, the air pressure in the sewage cavity due to the sewage entering the sewage cavity can be discharged, and the cleaning liquid with foam mixed with bubbles in the sewage cavity can continue to defoam itself until the pressure inside and outside the sewage cavity is balanced, and all the bubbles are naturally dispersed.

[0081] Specifically, referring to Figure 5 、 Figure 6 , the integrated water tank 1 includes a water tank body 10, and the water tank body 10 is provided with a water tank partition plate 10c for dividing the integrated water tank 1 into a clean water cavity and a sewage cavity. The sewage inlet 12 of the integrated water tank 1 is provided with a float ball assembly S on the channel communicating with the sewage cavity, and the float ball assembly S is provided with a sensing magnetic sheet S1 at one end close to the left side wall of the cleaner head housing 2. A Hall sensor S2 is arranged on the side wall of the cleaner head housing 2 corresponding to the sensing magnetic sheet S1. When the sewage in the sewage cavity is full, the float ball assembly S floats up, and under the limitation of the rotating support (not marked in the figure), the float ball assembly S rotates to the position shown in Figure 6 , the float ball sensing magnetic sheet S1 is just opposite to the Hall sensor S2 of the side wall of the cleaner head housing 2. The Hall sensor S2 is electrically connected to the control system (not shown in the figure) of the scrubber, and after receiving the signal that the sewage in the sewage cavity is full, the Hall sensor S2 transmits the signal to the control system. The control system then informs the user through the voice broadcast system (not shown in the figure) of the scrubber to pour out the sewage in time and supplement clean water.

[0082] Further, as shown in Figure 7 、 Figure 8 、 Figure 11 、 Figure 12As shown, the front end of the two side walls of the cleaner head housing body 20 is further provided with a gas distribution channel 208 arranged in parallel with the cleaning tank, the cleaning tank and the gas distribution channel 208 are actually a body type side-lying "S" shaped crossbeam with the cleaning tank opening facing away from the upper surface of the cleaning roller 5, the opening of the cleaning tank is provided with a detachable cleaning tank sealing cover (not shown in the figure) for sealing the cleaning tank, the opening of the gas distribution channel 208 faces the upper surface of the cleaning roller 5, the air discharged from the sewage cavity along the sewage guide channel N is discharged into the gas distribution channel 208 along the exhaust channel M through the exhaust port 207, the pores of the wiping layer on the upper surface of the cleaning roller 5 can just absorb the air discharged from the sewage cavity, so that the cleaning liquid with foam bubbles in the sewage cavity can continue to self-defoam until the pressure inside and outside the sewage cavity is balanced, and all the bubbles are naturally dissipated.

[0083] Specifically, referring to Figure 3 、 Figure 5 、 Figure 6 、 Figures 13 to 16 As shown, the side cover assembly 6 includes a side cover body 60, a first weir 601 and a second weir 602 extending outward from the reference plane of the side cover body 60. The side cover body 60 has a shape corresponding to the upper edge of the left side wall of the cleaner head housing 2, and a chamfered edge 60a of the side cover body 60 is provided at the corresponding vertical edge of the vertical long edge of the first weir 202 of the middle region of the integrated water tank 1 installed on the side wall of the cleaner head housing 2, the chamfered edge 60a is chamfered towards the sewage guide exhaust channel, the side cover body 60 includes a first weir 601 and a second weir 602 extending outward from the reference plane of the side cover body 60 towards the sewage guide exhaust channel, the first weir 601 encloses the outer edge of the side cover body 60, the first weir 601 leaves a larger distance on three edges except the top edge of the side cover body 60, the first weir 601 only leaves a distance of one wall thickness of the flange 201 of the side wall ring on the top edge of the side cover body 60, and the first weir 601 is used to block the gap between the entire sewage guide exhaust channel and the side wall; the second weir 602 further encloses the sewage guide channel N in the entire sewage guide exhaust channel within the area enclosed by the first weir 601, and the second weir 602 is used to block the gap between the sewage guide channel N and the side wall.

[0084] As Figure 4 、 Figure 5 、 Figure 6As shown, the flange 201 of the left side wall of the cleaner head housing body 20, the first weir 202 and the second weir 203 jointly enclose the exhaust passage M. On the sewage backflow side cover body 60, the area enclosed between the first weir 601 and the second weir 602 is used to block the gap between the exhaust passage M and the side wall. The knob chamfer edge 60a provided on the side cover body 60 corresponding to the vertical long side of the first weir 202 facilitates the user to have a point of force when it is necessary to remove the entire side cover assembly 6, without the need for other professional tools, the user can directly use his hand to open one side of the entire side cover assembly 6 through the knob chamfer edge 60a, and then naturally realize the separation of the entire side cover assembly 6 and the side wall of the cleaner head housing 2.

[0085] Further, as shown in the first weir 601 Figures 13 to 16 The outer wall of the first weir 601 is provided with a first weir sealing ring 601a for blocking the sewage guide exhaust passage on the side wall, and the outer wall of the second weir 601 is provided with a second weir sealing ring 602a for blocking the sewage guide passage N on the side wall. The first weir sealing ring 601a and the second weir sealing ring 602a are both made of elastic material and have sufficient elastic deformation space to block the gap between the first weir 601, the second weir 602 and the sewage guide exhaust passage. The first weir sealing ring 601a and the second weir sealing ring 602a can use their own elasticity to improve the reliability of the side cover assembly 6 in sealing the entire sewage guide exhaust passage, while also appropriately reducing the size precision requirements of the sewage backflow side cover body 60, the first weir 601 and the second weir 602, which can improve the efficiency and yield of the scrubber during manufacturing and facilitate user self-maintenance of the sewage guide exhaust passage.

[0086] Further, the first weir sealing ring 601a and the second weir sealing ring 602a can be directly and respectively elastically sleeved on the first weir 601 and the second weir 602, or the first weir sealing ring and the second weir sealing ring can be directly formed on the first weir and the second weir through a secondary encapsulation process.

[0087] Further, as shown in the first weir 601 Figure 4As shown, the height dimension of the second cofferdam 602 above the reference plane of the sewage backflow side cover body 60 is higher than that of the first cofferdam 601, and the height dimension of the second cofferdam sealing ring 602a above the reference plane of the sewage backflow side cover body 60 is higher than that of the first cofferdam sealing ring 601a. In this way, when the second cofferdam 602 and the second cofferdam sealing ring 602a block the gap between the sewage guide channel N and the side wall, even if sewage leakage occurs, the first cofferdam 601 and the first cofferdam sealing ring 601a can continue to block the gap between the entire sewage guide and exhaust channel and the side wall, further improving the sealing reliability of the entire sewage guide and exhaust channel of the side cover assembly 6 of the scrubber.

[0088] Embodiment Two:

[0089] In a specific embodiment, in combination with Figure 9 , Figure 10 As shown in the foregoing embodiment one, the air discharge port 207 of the air discharge channel 208 of the cleaning head shell 2 is provided with an air discharge port 209 near the left side wall of the cleaning head shell body 20. Another air discharge channel outside the left side wall of the cleaning head shell 20 has two paths to realize the air to be discharged outward through the air discharge channel M, the first path is that the air to be discharged can be discharged to the air discharge port 207 through the air discharge channel M first, and then continue along the air discharge channel 208 to the space between the air discharge channel 208 and the upper surface of the cleaning roller 5, the second path is that the air to be discharged can be discharged to the air discharge port 207 through the air discharge channel M first, and then to the gap space between the upper surface of the cleaning roller 5 and the detachable upper cover 3 outside the air discharge channel 208 after passing through the air discharge port 209. The pores of the wiping layer on the upper surface of the cleaning roller 5 can just absorb the air discharged from the sewage cavity. In this way, when the sewage flows into the sewage cavity of the integrated water tank 1 along the sewage guide channel N, even if the sewage guide channel N does not have enough space to defoam the cleaning liquid with foam mixed with bubbles in the sewage, the cleaning liquid with foam mixed with bubbles can flow into the sewage cavity along the sewage guide channel N, because the air discharge channel M is open, the air pressure in the sewage cavity due to the inflow of sewage can be discharged, and the cleaning liquid with foam in the sewage cavity can continue to defoam itself until the pressure inside and outside the sewage cavity is balanced, and all the bubbles are naturally dispersed.

[0090] Embodiment Three:

[0091] In a specific embodiment, on the basis of the foregoing embodiment one, the height of the second weir 203 on the side wall of the cleaning head shell 2 is flush with the height of the shell left flange 201 and the first weir 202; correspondingly, the height dimension of the second weir 602 above the reference plane of the sewage backflow side cover body 60 is also flush with the height dimension of the first weir 601 above the reference plane of the sewage backflow side cover body 60, and similarly, the height dimension of the second weir sealing ring 602a above the reference plane of the sewage backflow side cover body 60 is also flush with the height dimension of the first weir sealing ring 601a above the reference plane of the sewage backflow side cover body 60. In this way, when the second weir 602 and the second weir sealing ring 602a block the gap between the sewage guide channel N and the side wall, even if sewage leakage occurs, the first weir 601 and the first weir sealing ring 601a can still block the gap between the entire sewage guide exhaust channel and the side wall, further improving the sealing reliability of the side cover assembly 6 to the entire sewage guide exhaust channel.

[0092] Embodiment four:

[0093] In a specific embodiment, the difference from the foregoing embodiment one is the specific form of the second weir 203, referring to Figure 17 , an second weir 203 is further provided inside the straight wall ring and is closedly connected with the long vertical wall and the long bottom wall (not shown in the figure) of the first weir 202. The height of the second weir 203 is lower than that of the flange 201 and the first weir 202. The second weir 203 encloses a smaller straight wall inner ring in the entire sewage guide exhaust channel than the foregoing straight wall ring. The left side wall of the cleaning head shell body 20, the straight wall inner ring, and the inner wall of the side cover assembly 6 together enclose the sewage guide channel N. In this way, the difficulty of injection molding of the left side wall of the cleaning head shell body 20 is reduced, and the complexity of the entire sewage guide exhaust channel composed of double straight wall rings is reduced. Similarly, referring to Figures 18 to 20 , the first weir 601 and the second weir 602 of the side cover assembly 6 in the "single-layer straight wall" part of the entire sewage guide exhaust channel are actually coincident, and at the same time, the first weir sealing ring 601a and the second weir sealing ring 602a of the side cover assembly 6 in the "single-layer straight wall" part of the entire sewage guide exhaust channel are also actually coincident. In this way, the manufacturing difficulty of the side cover assembly 6 is also reduced, the efficiency and yield of the scrubber during manufacturing can be improved, and the convenience of user self-maintenance of the sewage guide exhaust channel is also facilitated.

[0094] Embodiment five:

[0095] In a specific embodiment, on the basis of the foregoing embodiment three, the second weir 203 is only a weir that divides the entire sewage guide and exhaust passage into an upper structure of the sewage guide passage and an exhaust passage, the exhaust passage is actually surrounded by the U-shaped lower half of the first weir 202 and the straight second weir 203, the side cover assembly 6 has three edges in the "single-layer straight wall" part of the entire sewage guide and exhaust passage, the first weir seal ring 601a and the second weir seal ring 602a of the side cover assembly 6 in the "single-layer straight wall" part of the entire sewage guide and exhaust passage are actually superimposed, which reduces the manufacturing difficulty of the side cover assembly 6, improves the efficiency and yield of the scrubber during the manufacturing process, and facilitates the user's regular maintenance of the sewage guide and exhaust passage.

[0096] Embodiment six:

[0097] In a specific embodiment, in combination with Figure 4 As shown in FIG. 6, on the basis of the foregoing embodiment one, an electromagnetic valve (not marked in the figure) controlled by a control system is arranged at the exhaust port 207 of the left side wall of the cleaning head shell body 20, and only when the electromagnetic valve is in an open state, another exhaust passage outside the left side wall of the cleaning head shell 20 can be opened. When the electromagnetic valve is in an open state, there are two paths for the air to be discharged to be discharged outward through the exhaust passage M, the first path is that the air to be discharged can be discharged to the exhaust port 207 through the exhaust passage M first, and then continue to the space between the air diffuser passage 208 and the upper surface of the cleaning roller 5. The second path is that the air to be discharged can be discharged to the exhaust port 207 through the exhaust passage M, and then to the gap space between the upper surface of the cleaning roller 5 and the detachable upper cover 3 outside the air diffuser passage 208 after passing out of the air diffuser port 209. The pores of the sponge layer on the upper surface of the cleaning roller 5 can just absorb the air discharged from the sewage cavity. The control system can automatically open and close the electromagnetic valve according to the actual use of the user according to the preset parameters. When the electromagnetic valve is closed, the air with odor in the sewage cavity can be prevented from being discharged into the air around the scrubber.

[0098] Embodiment seven:

[0099] In a specific embodiment, in combination with Figure 4As shown, on the basis of the preceding embodiment six, a one-way valve (not marked in the figure) is arranged at the exhaust port 207 of the left side wall of the cleaning head body 20, which is an inlet-in and outlet-out type and can realize two-way air flow conduction and outward pressure relief when reaching a preset pressure value. When the sewage cavity accumulates a certain amount of sewage, the pressure difference between the inlet and outlet of the one-way valve approaches the preset value, and the sewage cavity further accumulates sewage. When the pressure difference between the inlet and outlet of the one-way valve exceeds the preset value, the one-way valve is in a conduction state, and the air in the sewage cavity can further pass through the one-way valve to relieve the pressure outward. When the pressure difference between the inlet and outlet of the one-way valve is lower than the preset value again, the one-way valve is automatically closed. When the user stops using the scrubber, the pressure difference between the inlet and outlet of the one-way valve will naturally decrease to below the preset value, and the one-way valve is automatically closed, which can prevent the smelly air in the sewage cavity from being discharged into the air around the scrubber.

[0100] The sewage backflow pressure relief mechanism provided by the embodiment of the application can block the sewage guide exhaust passage on the cleaning head of the scrubber, so that the air pressure and the cleaning liquid mixed with bubbles and foam discharged outward when the sewage is guided to the sewage cavity of the integrated water tank are prevented from leaking through the side wall. In addition, when the sewage flows into the sewage cavity of the integrated water tank along the sewage guide passage, even if the sewage guide passage does not have enough space to treat the residual cleaning liquid mixed with bubbles and foam in the sewage, the cleaning liquid mixed with bubbles and foam can flow into the sewage cavity along the sewage guide passage. The exhaust passage opened by the abutting port arranged on the back of the second weir can always release the air pressure that needs to be discharged from the sewage cavity after the sewage is introduced, and the cleaning liquid with bubbles in the sewage cavity can continue to self-defoam until the pressure inside and outside the sewage cavity is balanced, and all the bubbles are naturally dispersed. In addition, the side cover assembly can seal the side wall of the cleaning head of the scrubber, and the sewage guide passage and the exhaust passage can realize water guide and outward pressure relief, which improves the convenience of the user in regularly maintaining the sewage guide exhaust passage.

[0101] In a second aspect, based on the same inventive concept, the embodiment provides a cleaning head mechanism with the sewage backflow pressure relief mechanism of the first aspect. The cleaning head mechanism is provided with the sewage backflow pressure relief mechanism of the first aspect, and the cleaning head mechanism includes a cleaning head body 2, a cleaning roller 5 and a brush assembly, an integrated water tank 1, and a detachable upper cover 3. The cleaning head body 2 includes a cleaning head body 20, and the upper part of the two side walls of the front end of the cleaning head body 20 is open. The open part is covered with a detachable upper cover 3. The cleaning roller and the brush assembly are clamped between the two side walls of the front end of the cleaning head body 20. The integrated water tank 1 can be inserted or extracted transversely from the middle rear end of the cleaning head body 2.

[0102] Specifically, referring to Figure 4As shown, a solenoid valve (not shown in the attached figure) is provided at the exhaust port 207 on the left side wall of the cleaning head housing 20, which is controlled by the floor scrubber control system to open or close. The integrated water tank 1 includes a water tank body 10, and a water tank partition 10c is provided inside the water tank body 10 to divide the integrated water tank 1 into a clean water chamber and a wastewater chamber. The wastewater inlet 12 of the integrated water tank 1 is provided with a float assembly S in the channel connecting the wastewater chamber. A sensing magnetic sheet S1 is provided at one end of the float assembly S near the left side wall of the cleaning head housing 2, and a Hall sensor S2 is provided in the area on the side wall of the cleaning head housing 2 corresponding to the sensing magnetic sheet S1. When the wastewater chamber is full of wastewater, the float assembly S floats up. Under the constraint of the rotating bracket, the float assembly S rotates to a position where... Figure 6 As shown, the float-type magnetic induction plate S1 is directly opposite the Hall sensor S2 on the side wall of the cleaning head housing 2. The Hall sensor S2 is electrically connected to the control system of the floor scrubber. After receiving a signal that the wastewater chamber is full, the Hall sensor S2 transmits it to the control system. The control system then notifies the user through the floor scrubber's voice broadcast system to empty the wastewater and add clean water in time. At the same time, the control system controls the solenoid valve to open. If the user does not stop the machine to empty the wastewater, the floor scrubber can still be used. Figure 6 As shown, although the sewage chamber is full of sewage, the exhaust channel is still unobstructed. When the user pushes and pulls the cleaning head of the floor scrubber back and forth, the turbulent sewage can continue to be sprayed along the exhaust channel under the impact of the sewage onto the upper surface of the cleaning roller 5 in the air dispersing channel 208 and the upper surface of the cleaning roller 5 in the area covered by the removable cover in the air dispersing channel 208. In this way, the sewage will not be directly sprayed onto the already cleaned floor.

[0103] In one specific embodiment, reference is made to Figures 2 to 4As shown, the integrated water tank 1 of the scrubber head is connected with the cleaning roller through a water delivery pipeline, which includes a clean water suction pipe 21 for sucking clean water from the clean water outlet 11 of the integrated water tank and a clean water delivery pipe 22 for delivering clean water to the surface of the cleaning roller, the other end of the clean water suction pipe 21 is connected with the inlet of a flow sensor (not shown in the figure), the outlet of the flow sensor is connected with the suction port of a water pump (not shown in the figure), the other end of the clean water delivery pipe 22 is connected with the water outlet of the water pump, and the left side wall of the cleaning head body 20 is also provided with the aforementioned sewage guide channel N for recovering sewage from the surface of the cleaning roller. The clean water provided by the integrated water tank can wet the wiping layer on the outer surface of the cleaning roller, so that the wiping layer can clean the ground. When the flow sensor detects that the water pump cannot suck clean water, the flow sensor transmits a signal to the control system that the clean water cavity is out of water, and the control system informs the user through the voice broadcast system of the scrubber to dump sewage and supplement clean water in time, and at the same time, the control system immediately closes the electromagnetic valve to prevent the sewage in the sewage cavity from splashing onto the upper surface of the cleaning roller 5 along the exhaust passage.

[0104] In a third aspect, based on the same inventive concept, the present embodiment also provides a scrubber, which comprises the cleaning head mechanism according to the second aspect and a handle (not marked in the figure) cooperating with the cleaning head mechanism, the handle is installed on the handle mounting portion (not marked in the figure) of the cleaning head mechanism, and the handle is provided with a control system which can control the pressure regulating device according to the signal of the Hall sensor.

[0105] The scrubber provided by the present application can use the floating ball magnetic sheet in the integrated water tank to cooperate with the Hall sensor installed on the left side wall of the cleaning head body 20 to timely transmit the signal of whether the sewage cavity is full, and the control system of the scrubber can open or close the electromagnetic valve arranged at the exhaust port 207 according to the signal to ensure the smoothness of the exhaust passage or prevent the odor in the sewage cavity from being discharged outward along the exhaust passage. At the same time, the control system of the scrubber can also open or close the electromagnetic valve arranged at the exhaust port 207 according to the signal of whether the clean water cavity is out of water transmitted by the flow sensor arranged on the water delivery pipeline to ensure the smoothness of the exhaust passage or prevent the sewage in the sewage cavity from splashing onto the upper surface of the cleaning roller 5 along the exhaust passage.

[0106] The above has carried on the detailed introduction to the embodiment of the present application, and the principle and implementation mode of the present application are described by applying specific examples. The above description of the embodiments is only used to help understanding the method of the present application and its core idea. Meanwhile, the changes or deformations made by the person skilled in the art according to the idea of the present application, based on the specific implementation mode and application range of the present application, all belong to the protection range of the present application. In summary, the content of the present description should not be understood as the limitation of the present application.

Claims

1. A backflow pressure relief mechanism for sewage, provided on a cleaner head housing, characterized in that, The sewage guide channel is arranged on the left side wall of the cleaning head shell, and guides the sewage squeezed out from the cleaning roller into the sewage cavity of the water tank which can be inserted or extracted horizontally into the rear end of the cleaning head shell. The sewage cavity is provided with a floating ball assembly with a magnetic sheet rotating at a fixed point. The area of the left side wall corresponding to the magnetic sheet is provided with a Hall sensor. The left side wall is provided with a flange forming a closed ring. A first weir is arranged in the closed ring and forms a closed inner ring with the flange. The closed inner ring surrounds the sewage guide and exhaust channel. The exhaust channel is arranged on the left side wall and has an exhaust port at the end thereof. The sewage guide channel is communicated with the sewage inlet of the water tank. The exhaust port is arranged in the area corresponding to the outer surface of the cleaning roller. The sewage guide channel, the sewage inlet, the exhaust channel and the exhaust port are sequentially communicated to guide the air in the sewage cavity to be discharged to the outer surface of the cleaning roller. The exhaust channel surrounds the sewage guide channel to form a complete sewage guide and exhaust channel. A pressure regulating device for regulating the pressure difference between the inside and outside can be arranged at the exhaust port. The air distribution channel is arranged on the integral beam which connects the two side walls of the cleaning head shell. The exhaust port is communicated with the air distribution channel. The side cover assembly is arranged on the left side wall to seal the sewage guide and exhaust channel. The first weir is arranged in the closed ring to form a closed inner ring.

2. The backflow pressure relief mechanism of claim 1, wherein, The first weir is in U shape, and the two ends are connected to the inner wall of the flange.

3. The backflow pressure relief mechanism of claim 2, wherein, The front end of the cleaning head shell is provided with a cleaning tank connected to the two side walls. The water tank is an integral water tank, and the end portion abutting against the left side wall is provided with a clean water outlet and a sewage inlet. One end of the sewage guide channel is communicated with the sewage outlet of the cleaning tank, and the other end is communicated with the sewage inlet. One end of the exhaust channel is communicated with the exhaust port, and the other end is communicated with the sewage inlet.

4. The backflow pressure relief mechanism of claim 1, wherein, The sewage guide channel is provided with a sewage return port communicated with the sewage inlet. The exhaust channel is provided with an exhaust outlet communicated with the sewage inlet.

5. The backflow pressure relief mechanism of claim 4, wherein, The sewage inlet of the water tank is provided with a retractable sewage valve core.

6. The backflow pressure relief mechanism of claim 5, wherein, The closed ring is further provided with a second weir which independently forms a small closed ring to surround the sewage guide channel.

7. The backflow pressure relief mechanism of claim 6, wherein, The left side wall is further provided with a second weir which forms a small closed ring with the first weir to surround the sewage guide channel. The second weir starts from the straight edge of the first weir, wraps around the sewage return port, and then extends forward in the same direction and parallel to the horizontal edge of the first weir. The second weir continues to wrap around the sewage outlet and then downwardly merges with the horizontal edge of the first weir.

8. The backflow pressure relief mechanism of claim 6, wherein, The upper flat edge of the second weir is provided with an abutting port which elastically abuts against the sewage valve core at the sewage inlet. When the water tank is inserted into the cleaning head shell and installed in place, the abutting port simultaneously opens the sewage guide channel and the exhaust channel.

9. A backflow pressure relief mechanism for sewage as claimed in any one of claims 7 or 8, wherein, The pressure regulating device is an electromagnetic valve.

10. The backflow pressure relief mechanism of claim 1, wherein, The cleaning head shell is provided with a sewage return and pressure relief mechanism as claimed in any one of claims 1 to 10 between the two side walls of the front end.

11. A cleaning head mechanism characterized by, The cleaning roller and brush assembly are clamped on the two side walls of the front end of the cleaning head shell. The integral water tank can be inserted or extracted horizontally into the middle rear end of the cleaning head shell. The detachable cover is arranged on the front end of the cleaning head shell to cover the open part where the cleaning roller and brush assembly are clamped. The cleaning head mechanism as claimed in claim 11 is provided with a handle which is installed on the handle installation part of the cleaning head mechanism. The handle is provided with a control system which can control the pressure regulating device according to the signal of the Hall sensor. ​ 12. A scrubber, characterized in that ​

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