Surface cleaning device with splitter plate

Abstract

The invention discloses a surface cleaning device with a splitter plate, and belongs to the technical field of cleaning equipment, the surface cleaning device comprises a floor brush provided with a cleaning piece, the floor brush is provided with the splitter plate, the splitter plate is provided with an inlet, a plurality of nozzles and a flow channel, the flow channel comprises at least two stages of flow channel branches, and each flow channel branch is provided with a split-flow inlet and a split-flow branch; the flow dividing branches are used for dividing the cleaning fluid flowing in from the flow dividing inlets into parts flowing in two different directions, the flow channel branch inlets have first sectional areas S1, and the flow dividing branches of at least one stage of flow channel branch are provided with slow flow sections with the sectional areas larger than the first sectional areas S1 so as to slow down the flowing speed of the cleaning fluid in the slow flow sections. The flowing speed of the cleaning fluid is slowed down in the slow flow section before the cleaning fluid is sprayed out from the nozzles, and the cleaning fluid is sprayed out after being stored in the slow flow section for a short time, so that liquid outlet of each nozzle is uniform.

Description

Technical Field

[0001] The invention relates to the technical field of cleaning equipment, and in particular to a surface cleaning device with a diverter plate. Background Art

[0002] In recent years, some cleaning equipment has been more and more widely used in people's daily life. Various cleaning equipment has reduced people's daily cleaning workload and brought great convenience to users' lives. Existing surface cleaning machines generally include a body, a floor brush, a liquid supply component and a dirt collection component. The floor brush is provided with a cleaning member driven by a motor. The bottom of the floor brush is provided with an elastic floor scraper for scraping the surface to be cleaned. The liquid supply component provides liquid to the cleaning member so that the cleaning member can absorb the liquid and wet it and then wipe the surface to be cleaned. The dirt collection component can absorb the dirt at the bottom of the floor brush and the dirt scraped off by the cleaning member into the dirt collection bucket. The liquid supply component is generally equipped with a diverter plate, and a diverter channel is arranged inside the diverter plate. Through the diverter channel, a stream of liquid is diverted into multiple streams and then provided to the cleaning member. However, the cross-sectional area of ​​the diversion channel in the existing diverter plate is generally set uniformly from upstream to downstream. In order to wet the cleaning parts as quickly as possible, the liquid flows faster in the diverter plate, resulting in uneven liquid discharge from each nozzle and uneven wetting of the cleaning parts in the axial direction, which will cause multiple water marks to form when wiping the surface to be cleaned, affecting the cleaning effect. Summary of the invention

[0003] In order to solve the shortcomings and deficiencies existing in the above-mentioned prior art, the present invention provides a surface cleaning device with a diverter plate, which utilizes a slow flow section to slow down the flow speed of the cleaning fluid in the slow flow section, so that the flow speed of the cleaning fluid is slowed down in the slow flow section before being sprayed out from the nozzle. The cleaning fluid is stored for a short time in the slow flow section before being sprayed out, so that the liquid output from each nozzle is uniform.

[0004] In order to achieve the above-mentioned technical objectives, the present invention provides a surface cleaning device with a diverter plate, including a floor brush provided with a cleaning member, the floor brush is provided with a diverter plate for providing a cleaning fluid to the cleaning member, the diverter plate is provided with an inlet, a plurality of nozzles, and a flow channel connecting the inlet with each nozzle, the flow channel includes at least two levels of flow channel branches, the flow channel branches each have a diversion inlet and a diversion branch, the diversion branch is used to divert the cleaning fluid flowing in from the diversion inlet into parts flowing in two different directions, the flow channel branch inlet has a first cross-sectional area S1, and the diversion branch of the at least one level of flow channel branch has a slow flow section with a cross-sectional area greater than the first cross-sectional area S1, so as to slow down the flow velocity of the cleaning fluid in the slow flow section.

[0005] Preferably, the flow channel comprises a final flow channel branch connected to the nozzle, and the final flow channel branch is provided with a slow flow section whose cross-sectional area is larger than the cross-sectional area of ​​the diversion port of the final flow channel branch.

[0006] Preferably, the flow branch further includes a jet section disposed downstream of the slow flow section and connected to the nozzle, and the cross-sectional area of ​​the jet section is smaller than the first cross-sectional area S1.

[0007] Preferably, the cross-sectional area of ​​the final-stage flow branch decreases continuously from the slow flow section to the jet section.

[0008] Preferably, the final-stage flow diversion branch is inclined downward from the final-stage flow diversion inlet to the connected nozzle.

[0009] Preferably, the flow channel is arranged to be higher at the rear and lower at the front, so that the cleaning fluid flows obliquely downward from the rear to the front in the flow channel.

[0010] Preferably, the center plane of the flow channel has an inclination angle θ relative to the horizontal direction, 5°≤θ≤15°.

[0011] Preferably, the final flow channel branch includes a final transition section forming a final flow diversion inlet, and the angle between the final flow diversion branch and the final transition section is an acute angle.

[0012] Preferably, the nozzle has at least three hole walls which are connected in sequence along the circumferential direction, and the widths of the hole walls of the nozzle are set to be different.

[0013] Preferably, the diverter plate is arranged above the cleaning member, and the nozzle is arranged downwardly facing the cleaning member.

[0014] After adopting the above technical solution, the present invention has the following advantages:

[0015] 1. The surface cleaning device provided by the present invention has a slow flow section set in the last-stage flow branch. Since the cross-sectional area of ​​the slow flow section is larger than the first cross-sectional area S1 of the last-stage flow inlet, when the cleaning fluid enters the slow flow section from the last-stage flow inlet, the cross-sectional area of ​​the flow channel increases, the liquid pressure decreases, and the flow velocity of the cleaning fluid flowing in the slow flow section is lower than the flow velocity flowing upstream of the slow flow section. Secondly, the slow flow section with a larger cross-sectional area can accommodate a larger volume of cleaning fluid relative to other areas of the flow channel. The liquid flowing into the slow flow from the last flow inlet cannot immediately fill the slow flow section, so that at least part of the cleaning fluid is stored in the slow flow section for a short time before flowing to the nozzle and spraying out, thereby reducing the flow difference between each branch flow channel and making the liquid discharge from each nozzle uniform.

[0016] 2. The branch flow with a slow flow section is located in the final flow channel downstream of the diverter plate. The liquid flows slowly in the slow flow section and then is ejected from the nozzle. The liquid flow is slowed down and stored for a short time between the nozzles, shortening the difference in liquid flow rate and flow velocity in each flow channel branch, making the liquid discharge between each nozzle uniform. At the same time, the liquid can flow smoothly upstream of the final flow channel to ensure the liquid discharge speed of the diverter plate.

[0017] 2. The diversion branch is provided with a jet section downstream of the slow flow section. Since the cross-sectional area of ​​the jet section is smaller than the first cross-sectional area S1 of the final diversion inlet, the cross-sectional area of ​​the final diversion branch decreases from the upstream slow flow section to the downstream jet section. The jet section with a shrinking cross-sectional area increases the flow velocity of the cleaning fluid, thereby increasing the flow inertia force of the cleaning fluid when it flows through the jet section to the nozzle, so that the flow inertia force of the cleaning fluid when it flows into the nozzle can effectively offset the viscosity and surface tension of the cleaning fluid at the nozzle, so that the cleaning fluid can be smoothly ejected from the nozzle, thereby ensuring the speed of the cleaning fluid when it is ejected from the nozzle, so that the cleaning parts can be fully absorbed and moistened when the device is working.

[0018] 3. The cross-sectional area of ​​the diversion branch preferably decreases continuously from the upstream slow flow section to the downstream jet section. The inner surface of the diversion branch can be set as a smooth slope, which is beneficial to improve the smoothness of the flow of the cleaning fluid from upstream to downstream in the final diversion branch, thereby facilitating the improvement of the uniformity of the supply of the cleaning fluid by the diversion plate to the cleaning element, and avoiding the flow interference of the cleaning fluid caused by the steps formed on the inner surface of the diversion branch due to the change of cross-sectional area.

[0019] 4. The final-stage diversion branch is preferably inclined downward from the final-stage diversion inlet to the nozzle connected thereto, that is, the end of the final-stage diversion branch close to the final-stage diversion inlet is higher than the end close to the nozzle. The clean fluid flows from high to low in the final-stage diversion branch. The gravitational potential energy generated by the drop of the clean fluid can effectively offset the viscosity and surface tension of the clean fluid at the nozzle, so that the clean fluid can flow smoothly to the nozzle.

[0020] 5. Reasonably set the inclination angle γ of the final shunt branch relative to the horizontal direction to ensure that the cleaning fluid can be smoothly ejected from the nozzle while reasonably controlling the speed of the cleaning fluid ejected from the nozzle. If the inclination angle γ is less than 2°, the height difference at both ends of the final shunt branch is too small, which is not conducive to using the gravitational potential energy generated by the height difference of the cleaning fluid to offset the viscosity and surface tension of the cleaning fluid at the nozzle, and is not conducive to ensuring the smoothness of the cleaning fluid ejected from the nozzle. If the inclination angle γ is greater than 5°, the height difference at both ends of the final shunt branch is too large, the speed of the cleaning fluid ejected from the nozzle is too fast, and the diverter plate is prone to excessive supply of cleaning fluid to the cleaning part. The excess cleaning fluid cannot be absorbed by the cleaning part in time and is prone to dripping, which is not conducive to improving the user experience.

[0021] 6. The flow channel is tilted so that the back is high and the front is low. The clean fluid flows obliquely downward from the back to the front in the flow channel and has a drop. The gravitational potential energy generated by the drop can effectively offset the viscosity of the clean fluid when it flows in the flow channel, thereby reducing the flow resistance of the clean fluid in the flow channel, allowing the clean fluid to flow smoothly in the flow channel, which is conducive to improving the smoothness and uniformity of the clean fluid being ejected from the nozzle. In addition, due to the tilted flow channel, when gas or bubbles are mixed into the liquid clean fluid, the gas or bubbles with lower density will move upward and away from the nozzle under the action of buoyancy, avoiding the situation where gas or bubbles follow the liquid clean fluid to the nozzle and cause air blockage, which is conducive to improving the uniformity of the clean fluid ejected from each nozzle.

[0022] 7. Reasonably set the inclination angle θ of the center plane of the flow channel relative to the horizontal direction to ensure that the cleaning fluid can flow smoothly in the flow channel while reasonably controlling the overall thickness of the diverter plate. If the inclination angle θ is less than 5°, the front-to-back drop of the flow channel is small, and the gravitational potential energy of the cleaning fluid in the flow channel due to the drop is small. The gravitational potential energy of the cleaning fluid cannot effectively offset the flow resistance of the cleaning fluid in the flow channel, which is not conducive to ensuring the smooth flow of the cleaning fluid in the flow channel. If the inclination angle θ>15°, the front-to-back drop of the flow channel is large, and the overall height of the diverter plate is large, which results in a significant increase in the height of the floor brush from the ground, which is not conducive to the floor brush entering low spaces such as under the bed, under the cabinet, and under the sofa for cleaning.

[0023] 8. The angle between the final shunt branch and the final transition section is set at an acute angle. The acute angle can reasonably reduce the flow velocity of the clean fluid when it flows from the final shunt inlet into the final shunt branch, avoid the situation where the clean fluid with too fast flow velocity still flows to the nozzle at a faster flow velocity after the slow flow of the slow flow section, and reasonably control the speed of the clean fluid ejected from the nozzle to avoid the situation where the clean fluid cannot be absorbed by the cleaning part in time due to the excessive flow velocity and dripping occurs. At the same time, a protrusion protruding forward is formed at the connection position of the final shunt branch and the final shunt inlet by setting an acute angle, so that impurities, scale and other particles carried in the clean fluid whose flow velocity is slowed down in the final shunt branch can be retained in the slow flow section, and the protrusion corresponding to the final shunt inlet and protruding forward can accommodate a small amount of impurities, scale and other particles, so as to avoid the particles following the clean fluid to flow directly to the nozzle, which causes the nozzle to be easily blocked after long-term use.

[0024] 9. The widths of the holes of the nozzle are preferably unequally set so that the cleaning fluid flowing into the nozzle is subjected to different surface tensions on the holes of the nozzle, that is, the cleaning fluid is subjected to unbalanced surface tension in the nozzle, which makes it difficult for the cleaning fluid to gather into a sphere and stay at the nozzle, so that the cleaning fluid can be ejected smoothly from the nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1This is a diagram of the entire surface cleaning device of Embodiment 1;

[0026] Figure 2 is a cross-sectional view of a floor brush in a surface cleaning device of Example 1 along the front-to-back direction;

[0027] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0028] Figure 4 It is a partial structural diagram of a floor brush in a surface cleaning device of Example 1;

[0029] Figure 5 It is a structural diagram of a diverter plate in a surface cleaning device of Example 1;

[0030] Figure 6 It is a partial structural diagram of a diverter plate in a surface cleaning device of Example 1;

[0031] Figure 7 It is a structural diagram of a part of the flow passage on the diverter plate in the surface cleaning device of Example 1;

[0032] Figure 8 It is a structural diagram of the final flow channel branch in the surface cleaning device of Example 1;

[0033] Fig. 9 It is a cross-sectional view of the lower plate body of the diverter plate in the surface cleaning device of Example 1 along the left-right direction;

[0034] Fig.10 It is a structural diagram of a roller brush cover in a surface cleaning device of Example 1;

[0035] Fig.11 It is a structural schematic diagram of a fluid supply assembly in a surface cleaning device in Example 1;

[0036] Fig.12 It is a schematic diagram of the cooperation between the driving assembly and the cleaning element in the surface cleaning device of Example 1;

[0037] Fig.13 It is a partial structural diagram of a floor brush in the surface cleaning device of the second embodiment;

[0038] Fig.14 It is a partial structural diagram of the floor brush when the bottom surface of the nozzle in the surface cleaning device of Example 3 is set as an inclined surface;

[0039] Fig.15 It is a partial structural diagram of the floor brush when the bottom surface of the nozzle in the surface cleaning device of Example 3 is set as a curved surface;

[0040] Fig.16 It is a partial structural diagram of a floor brush in the surface cleaning device of the fourth embodiment;

[0041] Fig.17is a cross-sectional view of a floor brush in a surface cleaning device of Embodiment 5 along the front-to-back direction;

[0042] Fig.18 This is a structural diagram of a diverter plate in a surface cleaning device of Example 7;

[0043] Fig.19 for Fig.18 Partial structural diagram of some flow channels on the diverter plate in the mid-surface cleaning device.

[0044] In the figure, 100-floor brush, 110-floor brush body, 120-roller brush cover, 121-upper cover plate, 122-lower cover plate, 123-light guide plate, 130-roller brush chamber, 140-scraper, 150-sewage suction port, 160-floor scraper, 170-convex ring, 171-front edge, 172-rear edge, 180-light emitting component, 200-cleaning member, 210-front roller shaft, 220-rear roller shaft, 230-annular cleaning belt, 240-bracket, 300-diverter plate, 310-inlet, 320-nozzle, 330-flow channel, 331-first-level flow channel branch, 3311-first-level diversion inlet, 3312-first-level diversion branch, 332-secondary flow channel branch, 3321-secondary diversion Inlet, 3322-secondary diversion branch, 3323-primary transition section, 333-final flow channel branch, 3331-final diversion inlet, 3332-final diversion branch, 3332a-slow flow section, 3332b-jet section, 3333-final transition section, 340-convex column, 350-nozzle, 351-rib, 361-upper plate, 362-lower plate, 400-body, 410-handle, 500-drive assembly, 510-motor, 520-reduction mechanism, 600-fluid supply assembly, 610-liquid storage tank, 620-pump, 630-heater, 640-connector assembly, 641-first connector, 642-second connector, 650-pipeline. DETAILED DESCRIPTION

[0045] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following words indicating orientation or positional relationship such as "upper", "lower", "left", "right", "longitudinal", "lateral", "inner", "outer", "vertical", "horizontal", "top", "bottom", etc. are only based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device / element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0046] It should be noted that the surface cleaning device in the embodiment of the present invention can be a handheld cleaning machine with a handle and manually operated by a user, such as a handheld floor scrubber, a handheld floor mopper, a handheld vacuum cleaner, etc.; it can also be a cleaning robot with drive wheels, which can control the movement of the drive wheels according to a program stored in itself, and control the cleaning rollers to clean the floor.

[0047] Embodiment 1

[0048] Combination Figures 1 to 12 , a surface cleaning device with a diverter plate provided in a first embodiment of the present invention includes a floor brush 100 provided with a cleaning member 200, the floor brush 100 is provided with a diverter plate 300 for providing a cleaning fluid to the cleaning member 200, the diverter plate 300 is provided with an inlet 310, a plurality of nozzles 320, and a flow channel 330 for connecting the inlet 310 with each nozzle 320, the flow channel 330 includes at least two levels of flow channel branches, the flow channel branches have a diversion inlet and a diversion branch, and the diversion branch is used to divert the cleaning fluid flowing in from the diversion inlet into parts flowing in two different directions. The flow channel branch inlet has a first cross-sectional area S1, and the diversion branch of at least one level of flow channel branch has a slow flow section 3332a with a cross-sectional area greater than the first cross-sectional area S1, so as to slow down the flow speed of the cleaning fluid in the slow flow section 3332a.

[0049] It is understood by those skilled in the art that the diverter plate 300 may be a diverter plate with two-stage flow channel branches, a diverter plate 300 with three-stage flow channel branches, or a diverter plate with four-stage flow channel branches, etc., which have at least two-stage flow channel branches. Taking the diverter plate 300 with three-stage flow channel branches as an example, the diverter plate 300 includes a primary flow channel branch 331, a secondary flow channel branch 332, and a final flow channel branch 333 connected to the inlet 310. Accordingly, the slow flow section 332 with a cross-sectional area larger than the flow channel branch inlet may be located on the primary flow channel branch 331 and / or the secondary flow channel branch 332 and / or the final flow channel branch 333, so as to slow down the flow speed of the liquid during the flow of the liquid in the flow channel, reduce the liquid flow difference between the various diverter branches, so that when the liquid is ejected from the nozzle 320, the liquid flow rate is basically equal, so as to achieve uniform liquid supply, reduce water marks on the surface to be cleaned, and improve the cleaning effect.

[0050] As an implementable solution of this embodiment, the slow flow section 3332a is located on the final flow channel branch 333. Specifically, the flow channel branch includes a final flow channel branch 333 connected to the nozzle 320, a final flow branch inlet 3331 of the final flow channel branch 333 has a first cross-sectional area S1, and a final flow branch 3332 of the final flow channel branch 333 includes at least a slow flow section 3332a having a cross-sectional area greater than the first cross-sectional area S1, so as to slow down the flow speed of the cleaning fluid in the slow flow section 3332a.

[0051] Since the cross-sectional area of ​​the slow flow section 3332a is larger than the first cross-sectional area S1 of the final-stage diversion inlet 3331, the flow velocity of the cleaning fluid is slowed down when passing through the final-stage diversion inlet 3331 and flowing through the slow flow section 3332a of the final-stage diversion branch 3332, so that the cleaning fluid is stored for a short time in the slow flow section 3332a before being ejected from the nozzle 320, so that the liquid output from each nozzle 320 is uniform.

[0052] Specifically, when the clean fluid enters the slow flow section from the final diversion inlet, the cross-sectional area of ​​the flow channel increases, the liquid pressure decreases, and the flow velocity of the clean fluid flowing in the slow flow section is lower than the flow velocity flowing upstream of the slow flow section. Secondly, the slow flow section with a larger cross-sectional area can accommodate a larger volume of clean fluid relative to other areas of the flow channel. The liquid flowing into the slow flow from the final diversion inlet cannot immediately fill the slow flow section, so that at least part of the clean fluid is stored in the slow flow section for a short time before flowing to the nozzle and spraying out, thereby reducing the flow difference between the branch flow channels and making the liquid discharge from each nozzle uniform.

[0053] This embodiment is described by taking a handheld surface cleaning device as an example. Figure 1 , Figure 2 The surface cleaning device further comprises a body 400 having a handle 410 at the top, the floor brush 100 comprises a floor brush body 110 and a roller brush cover 120, the bottom end of the body 400 is pivotally connected to the rear side of the floor brush body 110, and the roller brush cover 120 is detachably buckled to the front side of the floor brush body 110. When the roller brush cover 120 is buckled to the front side of the floor brush body 110, the roller brush cover 120 and the floor brush body 110 enclose a roller brush cavity 130, and the cleaning member 200 is detachably installed in the roller brush cavity 130.

[0054] Combination Figure 2 In this embodiment, in order to improve the wiping efficiency and wiping effect of the cleaning member 200 on the surface to be cleaned, the cleaning member 200 preferably adopts a crawler mop structure. Specifically, the cleaning member 200 includes a front roller 210, a rear roller 220, an annular cleaning belt 230 and a bracket 240. The front roller 210 is rotatably mounted on the front side of the bracket 240, and the rear roller 220 is rotatably mounted on the rear side of the bracket 240. The front roller 210 and the rear roller 220 are spaced and distributed in parallel with each other through the bracket 240, and the annular cleaning belt 230 is sleeved on the outside of the front roller 210 and the rear roller 220. Fig.12The floor brush body 110 is provided with a driving assembly 500 for driving the cleaning member 200. The driving assembly 500 includes a motor 510 and a speed reduction mechanism 520. The motor 510 drives the rear roller 220 to rotate through the speed reduction mechanism 520. The rotating rear roller 220 drives the annular cleaning belt 230 to make a circular motion. The annular cleaning belt 230 making a circular motion drives the front roller 210 to rotate. Furthermore, in this embodiment, the front roller 210 and the rear roller 220 are set with equal diameters, or the diameter of the front roller 210 can also be set smaller than the rear roller 220. It is understandable that the bracket 240 can adopt an existing fixed structure or an existing retractable structure, and no excessive restrictions are made here. It is understandable that the two rollers of the cleaning member 200 can be set at the same height, or they can be set with the front higher and the rear lower, and no excessive restrictions are made here.

[0055] Combination Figure 2 In this embodiment, the front side of the floor brush body 110 is provided with a scraper 140, a dirt suction port 150 and a floor scraper 160 distributed from top to bottom. The dirt suction port 150 is arranged at the rear side of the middle part of the cleaning member 200 and communicates with the roller brush chamber 130. The scraper 140 is arranged above the dirt suction port 150. The rear end of the scraper 140 is positioned in the floor brush body 110. The front end of the scraper 140 extends into the roller brush chamber 130 and contacts the annular cleaning belt 230. The scraper 140 scrapes the moving annular cleaning belt 230, and the scraped dirt falls at the dirt suction port 150. The floor scraper 160 is arranged below the dirt suction port 150. The floor scraper 160 is elastic and the bottom side is in interference contact with the surface to be cleaned. When the floor brush 100 moves, the floor scraper 160 scrapes the surface to be cleaned and the dirt accumulates at the dirt suction port 150. The surface cleaning device is also provided with a sewage collecting component including a sewage collecting fan, a sewage collecting barrel, a sewage collecting pipe, etc. The specific structure of the sewage collecting component can refer to the prior art and will not be elaborated here. The sewage collecting fan provides suction to form a sewage collecting airflow from the sewage suction port 150 through the sewage collecting pipe and flows into the sewage collecting barrel. The dirt at the sewage suction port 150 can flow into the sewage collecting barrel along the sewage collecting airflow.

[0056] Combination Figure 3 , Figure 4 In this embodiment, the diverter plate 300 is horizontally placed in the roller brush cover 120, and when the cleaning member 200 is installed in the roller brush chamber 130, the diverter plate 300 is located above the cleaning member 200. Figure 5 The rear side of the diverter plate 300 is provided with a convex column 340 extending backward, the inlet 310 is provided on the convex column 340, the front side of the diverter plate 300 is provided with a nozzle 350 extending downward from the roller brush cover 120, the nozzle 320 is provided on the nozzle 350, and the nozzle 320 is arranged facing the cleaning member 200. The diverter plate 300 includes an upper plate body 361 and a lower plate body 362 fixed together, and the flow channel 330 is located between the upper plate body 361 and the lower plate body 362 and is formed by the cooperation of the two plates.

[0057] Combination Figure 6 , Figure 7 In this embodiment, the flow channel 330 is provided with three levels from the back to the front, namely, the primary flow channel branch 331, the secondary flow channel branch 332 and the final flow channel branch 333, and each level of the flow channel branch is provided with at least two branch paths with different flow directions. Specifically, each level of the flow channel branch in this embodiment is provided with two branch paths with different flow directions and left-right symmetric. The cleaning fluid flowing in from the inlet 310 is divided into eight branches after three-level diversion. Accordingly, there are eight nozzles 320. Preferably, the eight nozzles 320 are evenly spaced along the axial direction of the cleaning member 120, that is, the distance between two adjacent nozzles 320 is preferably set equal.

[0058] Combination Figure 7 The primary flow channel branch 331 includes a primary flow diversion inlet 3311 and two primary flow diversion branches 3312 symmetrically arranged about the primary flow diversion inlet 3311, wherein the primary flow diversion inlet 3311 is formed at the front end of the inlet 310, and the two primary flow diversion branches 3312 extend from the primary flow diversion inlet 3311 to the left and right directions respectively. The secondary flow channel branch 332 is symmetrically arranged in two groups, and each group of secondary flow channel branches 332 includes a secondary flow diversion inlet 3321, two secondary flow diversion branches 3322 symmetrically arranged about the secondary flow diversion inlet 3321, and a primary transition section 3323 forming the secondary flow diversion inlet 3321, the primary transition section 3323 extends forward from the end of the primary flow diversion branch 3312, the secondary flow diversion inlet 3321 is arranged at the front end of the primary transition section 3323, and the two secondary flow diversion branches 3322 extend from the secondary flow diversion inlet 3321 to the left and right directions respectively. The final-stage flow channel branches 333 are symmetrically arranged in four groups, and each group of final-stage flow channel branches 333 includes a final-stage diversion inlet 3331, two final-stage diversion branches 3332 symmetrically arranged about the final-stage diversion inlet 3331, and a final-stage transition section 3333 forming the final-stage diversion inlet 3331. The final-stage transition section 3333 extends forward from the end of the secondary diversion branch 3322, the final-stage diversion inlet 3331 is arranged at the front end of the final-stage transition section 3333, the two final-stage diversion branches 3332 extend to the left and right directions from the final-stage diversion branch 3332 respectively, and the nozzle 320 is arranged at the front end of the end of the final-stage diversion branch 3332 and is connected to the final-stage diversion branch 3332.

[0059] In this embodiment, the cross-sectional areas of the primary flow channel branch 331, the secondary flow channel branch 332 and the final flow branch inlet 3331 are substantially equal and are all the first cross-sectional area S1. Figure 8In this embodiment, the slow flow section 3332a has a second cross-sectional area S2, and the second cross-sectional area S2 of the slow flow section 3332a decreases from the end close to the final diversion inlet 3331 to the end close to the nozzle 320. In this embodiment, the inner height of the flow channel 330 is generally consistent from front to back, and the size of the second cross-sectional area S2 and the first cross-sectional area S1 depends on the width of the cross section. The width of the final diversion inlet 3331 is W1, and the width of the slow flow section 3332a should be greater than W1. Figure 7 The straight line L1 in the figure represents the boundary between the slow flow section 3332a and the final diversion inlet 3331. The cross-sectional area of ​​the final diversion branch 3332 at the position indicated by the straight line L2 and the straight line L3 is also S1. The local area in the final diversion inlet 3331 located downstream of the straight line L1 and between the straight line L2 and the straight line L3 is the slow flow section 3332a.

[0060] Combination Figure 7 The final flow branch 3332 also includes a jet section 3332b located downstream of the slow flow section 3332a. The nozzle 320 is connected to the end of the jet section 3332b. The jet section 3332b has a third cross-sectional area S3, which is smaller than the first cross-sectional area S1. The jet section 3332b with a contracted cross-sectional area increases the flow velocity of the cleaning fluid, thereby increasing the flow inertia force of the cleaning fluid when it flows through the jet section 3332b to the nozzle 320, so that the flow inertia force of the cleaning fluid when it flows into the nozzle 320 can effectively offset the viscosity and surface tension of the cleaning fluid at the nozzle 320, so that the cleaning fluid can be smoothly ejected from the nozzle 320, thereby ensuring the speed of the cleaning fluid when it is ejected from the nozzle 320. In this embodiment, the cross-sectional area of ​​the last-stage diversion branch 3332 decreases from the slow flow section 3332a to the jet section 3332b. Since the cross-sectional area of ​​the last-stage diversion branch 3332 downstream of the straight line L2 and the straight line L3 is smaller than S1, the local area of ​​the last-stage diversion branch 3332 downstream of the straight line L2 and the straight line L3 is the jet area, and the straight line L2 and the straight line L3 are the dividing lines between the jet section 3332b and the slow flow section 3332a.

[0061] In this embodiment, the inner surface of the final-stage diversion branch 3332 is set as a smooth inclined surface, so that the cross-sectional area of ​​the final-stage diversion branch 3332 continuously decreases from the slow flow section 3332a to the jet section 3332b, which is beneficial to improving the smoothness of the flow of the clean fluid from upstream to downstream in the final-stage diversion branch 3332.

[0062] Combination Fig. 9In order to improve the flow smoothness of the cleaning fluid in the final-stage shunt branch 3332, the final-stage shunt branch 3332 is inclined downward from the final-stage shunt inlet 3331 to the nozzle 320 connected thereto, that is, the end of the final-stage shunt branch 3332 close to the final-stage shunt inlet 3331 is higher than the end close to the nozzle 320, and the cleaning fluid flows from high to low in the final-stage shunt branch 3332. The gravitational potential energy generated by the drop of the cleaning fluid can effectively offset the viscosity and surface tension of the cleaning fluid at the nozzle 320, so that the cleaning fluid can flow smoothly to the nozzle 320. The final-stage shunt branch 3332 has an inclination angle γ relative to the horizontal direction, 2°≤γ≤5°. In this embodiment, the inclination angle γ is preferably set to 4°. It can be understood that the inclination angle γ can also be set to other reasonable sizes such as 2°, 2.5°, 3°, 3.5°, 3.8°, 4.2°, 4.5°, 5°, etc.

[0063] Combination Figure 8 In order to reasonably reduce the flow velocity of the cleaning fluid when it flows from the final diversion inlet 3331 into the final diversion branch 3332, the final diversion branch 3332 extends obliquely from the direction away from the inlet 310 toward the direction close to the inlet 310, so that the nozzle 320 is away from the front edge of the roller brush cover 120.

[0064] Specifically, the angle between the final shunt branch 3332 and the final transition section 3333 is an acute angle, which enhances the blocking effect of the flow channel on the fluid, reduces the flow velocity of the liquid in the final shunt branch, and prevents the liquid from flowing directly out of the nozzle at a higher flow velocity. The liquid discharge velocity between the nozzles is uneven, which affects the cleaning effect. The final shunt branch tilted from back to front in the horizontal direction allows the fluid to stay in the final shunt branch for a short time, so that the fluid fills the final shunt branch before flowing out, shortens the fluid difference between the shunt branches, and makes the liquid supply of each nozzle basically uniform. Secondly, the final shunt branch tilted backward sets the nozzle away from the front edge of the roller brush cover, and uses the front end of the roller brush cover to form a certain blocking effect on the cleaning fluid ejected from the nozzle, avoiding the situation where the cleaning fluid ejected from the nozzle splashes out of the floor brush forward due to the nozzle being too close to the front edge of the roller brush cover. To avoid the situation where the cleaning fluid with too fast flow speed still flows to the nozzle 320 at a faster flow speed after passing through the slow flow section 3332a, the speed of the cleaning fluid ejected from the nozzle 320 is reasonably controlled to avoid the situation where the cleaning fluid cannot be absorbed by the cleaning member 200 in time due to the too fast flow speed and dripping occurs. In this embodiment, a final-stage flow branch 3332 connected to the same final-stage flow branch inlet 3331 extends from the final-stage flow branch inlet 3331 to the left rear, and another final-stage flow branch 3332 extends from the final-stage flow branch inlet 3331 to the right rear, and the angles between the two final-stage flow branches 3332 and the final-stage transition section 3333 are both λ. Figure 8The straight line C1 in the figure represents the center line of the final transition section 3333, and the straight lines C2 and C3 represent the center lines of the two final branch flow channels 330, respectively. The angles between the straight line C1 and the straight lines C2 and C3 are λ, which is about 82°. Since the final flow branch 3332 and the final transition section 3333 are arranged at an acute angle, the final flow branch 3332 extends obliquely from the front away from the inlet 310 to the rear close to the inlet 310, so that the nozzle 320 can be kept away from the front edge of the roller brush cover 120, and the front end of the roller brush cover 120 can be used to form a certain blocking effect on the cleaning fluid sprayed from the nozzle 320, so as to avoid the situation where the cleaning fluid sprayed from the nozzle 320 splashes out of the floor brush 100 due to the nozzle 320 being too close to the front edge of the roller brush cover 120. It is understandable that the angle λ between the two final-stage flow diversion branches 3332 and the final-stage transition section 3333 may also be set to other reasonable values ​​such as 78°, 80°, 84°, 85°, 87°, etc.

[0065] In order to allow the cleaning fluid to flow smoothly in the flow channel 330, the flow channel 330's diverter plate 300 is set in the roller brush cover 120 with the rear higher and the front lower, so that the flow channel 330 is set higher at the rear and lower at the front, and the cleaning fluid flows obliquely downward from the back to the front in the flow channel 330 and has a drop. The gravitational potential energy generated by the drop can effectively offset the viscosity of the cleaning fluid when it flows in the flow channel 330, thereby reducing the flow resistance of the cleaning fluid in the flow channel 330, so that the cleaning fluid can flow smoothly in the flow channel 330, which is conducive to improving the smoothness and uniformity of the cleaning fluid finally ejected from the nozzle 320. In addition, since the flow channel 330 is set obliquely, when gas or bubbles are mixed into the liquid cleaning fluid, the gas or bubbles with a smaller density will move upward and away from the nozzle 320 under the action of buoyancy, avoiding the situation where the gas or bubbles follow the liquid cleaning fluid to flow to the nozzle 320 to cause air blockage, which is conducive to improving the uniformity of the cleaning fluid ejected from each nozzle 320. In this embodiment, the inclination angle of the diverter plate 300 relative to the horizontal direction is the inclination angle θ of the center plane of the flow channel 330 in the height direction relative to the horizontal direction, and 5°≤θ≤15°. The inclination angle θ is preferably set to 7°, and the bottom surface of the nozzle 350 is a horizontal plane. It is understood that the inclination angle θ can also be set to 5°, 6°, 8°, 9°, 10°, 11°, 12°, 13°, 14°, 15° or other reasonable sizes.

[0066] In addition, in order to allow the cleaning fluid to be smoothly diverted through each level of the diverter branch, the angle between the two diverter branches of at least one level of the flow channel branch of the diverter plate 300 is less than 180°, that is, the flow channel branch is inclined in the horizontal direction to form a Y-shaped structure, so that when the liquid flows in the horizontal direction, the viscosity of the flow channel on the liquid can be reduced, so that the liquid has the force to flow from the inlet of the flow channel branch to the end of the flow channel branch, and the smoothness of the cleaning fluid flowing from the diverter inlet to the diverter branch is improved. Preferably, the angle between the two diverter branches is greater than 90° and less than 180°, so as to increase the spacing between two adjacent nozzles and make the nozzles evenly distributed in the axial direction of the roller brush. Taking the diverter plate 300 with three-level flow channel branches as an example, the angle between the two diverter branches of the first-level flow channel branch and / or the second-level flow channel branch and / or the last-level flow channel branch is greater than 90° and less than 180°, so as to give the liquid a force to extend along the width direction of the diverter plate 300 during the flow of the liquid.

[0067] As an implementable solution, the angle between the two primary flow branches 3312 of the primary flow channel branch 331 and the angle between the two secondary flow branches 3322 of each group of secondary flow channel branches 332 are both less than 180°, that is, the primary flow channel branch 331 and the secondary flow channel branch 332 are preferably in a Y-shaped structure, and the angle between the two primary flow branches 3312 and the angle between the two secondary flow branches 3322 are both about 174°. It is understandable that the angle between the two primary flow branches 3312 and the angle between the two secondary flow branches 3322 can also be set to 166°, 168°, 170°, 172°, 176°, 178°, 180° or other reasonable sizes.

[0068] Combination Figure 8 In order to prevent the cleaning fluid flowing into the nozzle 320 from gathering into a ball and being retained at the nozzle 320, the nozzle 320 has at least three hole walls connected in sequence along the circumferential direction, and the widths of the hole walls of the nozzle 320 are set unequally, so that the surface tension of the cleaning fluid flowing into the nozzle 320 on the hole walls of the nozzle 320 is different, that is, the cleaning fluid is subjected to unbalanced surface tension in the nozzle 320, so that the cleaning fluid will not gather and be retained in the nozzle 320. In this embodiment, the nozzle 320 is an irregular rectangular hole, that is, the widths of the four hole walls of the nozzle 320 are not equal. It can be understood that the nozzle 320 can also be set to other reasonable shapes such as irregular triangular holes, irregular pentagonal holes, irregular hexagonal holes, etc.

[0069] Combination Figure 3In order to avoid the situation that the cleaning fluid ejected from the nozzle 320 splashes forward out of the floor brush 100 driven by the cleaning member 200, the nozzle 320 is arranged facing the cleaning member 200 and extends backward from top to bottom. Compared with the vertical arrangement of the nozzle from top to bottom, the nozzle is subjected to the gravity of the fluid part flowing out from top to bottom. The reasonable setting of the nozzle direction is conducive to reducing the situation that the cleaning fluid ejected from the nozzle splashes forward out of the floor brush driven by the cleaning member, so that the cleaning fluid ejected from the nozzle can be effectively absorbed by the cleaning member, which is conducive to improving the uniformity of the liquid absorption and wetting of the cleaning member. On the other hand, after the liquid soaks the cleaning member 200 for a period of time, the wetted cleaning member 200 contacts the surface to be cleaned again. The cleaning fluid ejected from the nozzle 320 can be effectively absorbed by the cleaning member 200. In this embodiment, the extension direction of the nozzle 320 has an inclination angle β relative to the vertical direction, and the inclination angle β is about 6°. It is understandable that the inclination angle β may also be set to other reasonable values ​​such as 5°, 7°, 8°, 9°, 10°, 11°, 12°, etc.

[0070] Combination Figure 3 In order to allow the cleaning fluid sprayed from the nozzle 320 to be effectively absorbed by the cleaning member 200, at least the lower portion of the nozzle 320 is located behind the vertical plane where the central axis of the front roller 210 is located. Figure 3 The straight line P1 in the figure represents the vertical plane where the central axis of the front roller shaft 210 is located. In this embodiment, the nozzle 350 is located behind the straight line P1, so that the nozzle 320 is completely located behind the straight line P1. The cleaning member 200 enters the bending state after absorbing the cleaning fluid sprayed from the nozzle 320, so as to avoid the cleaning fluid that is not timely and effectively absorbed by the cleaning member 200 from being thrown forward under the action of centrifugal force. It can be understood that the nozzle 350 can also be located only at the lower end behind the straight line P1, so that the lower part of the nozzle 320 is located behind the straight line P1.

[0071] Combination Fig.10 The roller brush cover 120 is provided with a convex ring 170 which protrudes downward and surrounds the injection area. The nozzle 350 provided with the nozzle 320 is located in the injection area. The convex ring 170 has a front edge 171 and a rear edge 172. The rear edge 172 of the convex ring 170 contacts the bristles of the annular cleaning belt 230, which can reduce the influence of the negative pressure suction force of the pollutant collection airflow on the cleaning fluid sprayed from the nozzle 320, so that the cleaning fluid sprayed from the nozzle 320 can be effectively absorbed by the cleaning member 200, ensuring that the cleaning member 200 can be fully wetted.

[0072] Combination Fig.11The surface cleaning device includes a fluid supply assembly 600, which includes a liquid storage tank 610, a pump 620, a heater 630 and a joint assembly 640. The joint assembly 640 has a first joint 641 and a second joint 642 that can be detachably matched. The liquid storage tank 610, the pump 620, the heater 630 and the first joint 641 are sequentially connected from upstream to downstream through a pipeline 650. The second joint 642 is connected to the boss 340 through a hose. When the roller brush cover 120 is installed on the front side of the floor brush body 110, the first joint 641 and the second joint 642 cooperate with each other to connect the diverter plate 300 to the fluid supply assembly 600. The fluid supply assembly 600 can supply normal temperature cleaning fluid to the manifold 300, or supply high temperature cleaning fluid to the manifold 300 through heating by the heater 630, or supply a gas-liquid mixed cleaning fluid to the manifold 300 through heating by the heater 630, and further, supply a gaseous cleaning fluid to the manifold 300 through heating by the heater 630, and the user can select a corresponding cleaning fluid supply mode according to the dirtiness. It is understandable that the liquid storage tank 610 can be installed on the body 400 or on the floor brush 100.

[0073] Other structures of the surface cleaning device can refer to the prior art. For example, the surface cleaning device also includes a battery, a control module, a display module, etc., which will not be described in detail here.

[0074] When the device is working, the fluid supply component 600 supplies cleaning fluid to the annular cleaning belt 230 through the diverter plate 300. The cleaning fluid flows obliquely downward from back to front in the flow channel 330. The cleaning fluid flowing into the final-stage diversion branch 3332 from the final-stage diversion inlet 3331 has its flow velocity slowed down in the slow-flow section 3332a. By slowing down the flow velocity, the cleaning fluid is stored in the slow-flow section 3332a for a short time before continuing to flow to the nozzle 320. In addition, by slowing down the flow velocity, impurities, scale and other particles carried by the cleaning fluid can be retained in the slow-flow section 3332a, thereby preventing impurities, scale and other particles from following the cleaning fluid directly to the nozzle 320. The cleaning fluid with a slowed flow rate flows toward the nozzle 320 through the jet section 3332b. Since the cross-sectional area of ​​the jet section 3332b is smaller than that of the slow flow section 3332a, the jet section 3332b with a reduced cross-sectional area increases the flow rate of the cleaning fluid, thereby increasing the flow inertia force of the cleaning fluid when it flows toward the nozzle 320 through the jet section 3332b. When the cleaning fluid flows into the nozzle 320, the flow inertia force can effectively offset the viscosity and surface tension of the cleaning fluid at the nozzle 320, so that the cleaning fluid can be smoothly ejected from the nozzle 320.

[0075] Combination Figure 2The roller brush cover 120 includes an upper cover plate 121 and a lower cover plate 122 fixed together, the diverter plate 300 is clamped and fixed between the upper cover plate 121 and the lower cover plate 122, and the nozzle 350 extends downward through the lower cover plate 122 and out of the roller brush cover 120. It can be understood that when the light-emitting component 180 is arranged inside the floor brush body 110, the roller brush cover 120 also includes a light guide plate 123 for guiding the light emitted by the light-emitting component 180 forward out of the floor brush 100, and the light guide plate 123 is clamped and fixed between the upper cover plate 121 and the lower cover plate 122. At this time, the diverter plate 300 is preferably clamped and fixed between the upper cover plate 121 and the light guide plate 123, and the nozzle 350 extends downward through the light guide plate 123 and the lower cover plate 122 and out of the roller brush cover 120.

[0076] Embodiment 2

[0077] Combination Fig.13 In this embodiment, the front edge 171 of the raised ring 170 is set lower than the highest point of the cleaning member 200, and the front edge 171 of the raised ring 170 is used to block the cleaning fluid splashing forward under the action of centrifugal force, thereby preventing the cleaning fluid from splashing out of the floor brush 100. Fig.13 The straight line N1 in FIG. 1 represents the tangent direction at the highest point of the endless cleaning belt 230 , and the straight line N2 represents the height position of the bottom surface of the front edge 171 , and the straight line N2 is arranged lower than the straight line N1 .

[0078] The other structures of the second embodiment are the same as those of the first embodiment and will not be described in detail here.

[0079] Embodiment 3

[0080] Combination Fig.14 In this embodiment, the bottom surface of the nozzle 350 is preferably set to a slope with a low front and a high back, and the slope is used to guide the cleaning fluid sprayed from the nozzle 320 to avoid the cleaning fluid sprayed from the nozzle 320 from easily flowing forward and splashing out of the floor brush 100.

[0081] It is understandable that the bottom surface of the nozzle 350 may also be configured as Fig.15 The upwardly arched curved surface shown is lower in front and higher in the back.

[0082] The other structures of the third embodiment are the same as those of the first embodiment and will not be described in detail here.

[0083] It can be understood that the third embodiment can be combined with the second embodiment.

[0084] Embodiment 4

[0085] Combination Fig.16In this embodiment, a retaining rib 351 is provided on the bottom surface of the nozzle 350 in front of the nozzle 320 , and the retaining rib 351 is used to guide the cleaning fluid sprayed from the nozzle 320 to prevent the cleaning fluid sprayed from the nozzle 320 from flowing forward easily and splashing out of the floor brush 100 .

[0086] It is understandable that the retaining ribs 351 can be configured into reasonable shapes such as arc-shaped ribs, V-shaped ribs, etc.

[0087] The other structures of the fourth embodiment are the same as those of the first embodiment and will not be described in detail here.

[0088] It can be understood that the fourth embodiment can be combined with at least one of the second embodiment and the third embodiment.

[0089] Embodiment 5

[0090] Combination Fig.17 In this embodiment, the outer diameter of the front roller shaft 210 is smaller than the outer diameter of the rear roller shaft 220, and the roller brush cover 120 is installed on the front side of the floor brush body 110 with the rear higher and the front lower inclined, so that the diverter plate 300 located in the roller brush cover 120 is tilted with the rear higher and the front lower.

[0091] The other structures of the fifth embodiment are the same as those of the first embodiment and will not be described in detail here.

[0092] It can be understood that the fourth embodiment can be combined with at least one of the third embodiment and the fourth embodiment.

[0093] Embodiment 6

[0094] In this embodiment, the diverter plate 300 is placed vertically, and accordingly, the flow channel branches of each level of the flow channel 330 are distributed from top to bottom.

[0095] It is understandable that, due to the limited height of the roller brush cover 120 , the diverter plate 300 is preferably placed vertically in the front portion of the floor brush body 110 .

[0096] The other structures of the sixth embodiment are the same as those of the first embodiment and will not be described in detail here.

[0097] It can be understood that the sixth embodiment can be combined with at least one of the third embodiment, the fourth embodiment, and the fifth embodiment.

[0098] Embodiment 7

[0099] In this embodiment, Fig.18As shown, the diverter plate 300 is provided with an inlet 310, a plurality of nozzles 320, and a flow channel 330 for connecting the inlet 310 with each nozzle 320. The flow channel 330 includes at least two levels of flow channel branches. The flow channel branches have a diverter inlet and a diverter branch. The diverter branch is used to divert the clean fluid flowing in from the diverter inlet into parts flowing in two different directions.

[0100] Taking the diverter plate 300 with three-stage flow channel branches as an example, the diverter plate 300 includes a primary flow channel branch 331, a secondary flow channel branch 332 and a final flow channel branch 333 connected to the inlet 310. The slow flow section 3332 is arranged on the secondary flow channel branch 332 to slow the flow of the liquid. The liquid enters the diverter plate 300 from the inlet 310, and moves on at least two primary diverter branches 3312 moving in different directions under the guidance of the primary flow channel branch 331, and is diverted again through the secondary diverter inlet 3321. The liquid moving in different diverter branches may have certain differences in the movement speed during the movement process due to their different positions on the diverter plate 300. Therefore, a slow flow section 3332a having a cross-sectional area smaller than the cross-sectional area S1 of the secondary diversion inlet 3321 is provided on the secondary diversion branch 3322. When the clean fluid enters the slow flow section 3332a from the secondary diversion inlet 3321, the cross-sectional area of ​​the flow channel increases, the liquid pressure decreases, and the flow velocity of the clean fluid flowing in the slow flow section 3332a is lower than the flow velocity flowing upstream of the slow flow section 3332a. Secondly, the slow flow section 3332a with a larger cross-sectional area can accommodate a larger volume of clean fluid relative to other areas of the flow channel. The liquid flowing into the slow flow from the secondary diversion inlet 3321 cannot immediately fill the slow flow section 3332a, so that at least part of the clean fluid is stored in the slow flow section 3332a for a short time before flowing to the final diversion inlet 3331.

[0101] As an achievable solution of this embodiment, the final flow channel branch 333 is a "Y"-shaped flow channel that is inclined in the horizontal direction from the direction close to the inlet 310 to the direction away from the inlet 310, so as to guide the liquid to flow smoothly toward the nozzle 320. The liquid that flows out after slow flow in the slow flow section 3332a located in the secondary flow branch 332 makes the liquid flow rate difference between the nozzles 320 not large, so as to realize uniform liquid supply to the cleaning element 200.

[0102] In addition to the above preferred embodiments, the present invention has other implementation modes. Those skilled in the art may make various changes and modifications based on the present invention. As long as they do not depart from the spirit of the present invention, they should all fall within the scope defined in the claims of the present invention.

Claims

1. A surface cleaning device with a diverter plate, comprising a floor brush provided with a cleaning member, the floor brush provided with a diverter plate for providing a cleaning fluid to the cleaning member, the diverter plate provided with an inlet, a plurality of nozzles, and a flow channel for connecting the inlet with each nozzle, the flow channel comprising at least two levels of flow channel branches, the flow channel branches having a diverter inlet and a diverter branch, the diverter branch being used to divert the cleaning fluid flowing in from the diverter inlet into two parts flowing in different directions, characterized in that: The flow channel branch inlet has a first cross-sectional area S1, and the branch path of the at least one primary flow channel branch has a slow flow section with a cross-sectional area larger than the first cross-sectional area S1 to slow down the flow speed of the cleaning fluid in the slow flow section.

2. According to the surface cleaning device with a diverter plate as described in claim 1, the flow channel includes a final flow channel branch connected to the nozzle, and the final flow channel branch is provided with a slow flow section with a cross-sectional area larger than the cross-sectional area of ​​the diverter port of the final flow channel branch.

3. A surface cleaning device with a diverter plate according to any one of claims 1 or 2, characterized in that: The flow branch further includes a jet section disposed downstream of the slow flow section and connected to the nozzle, and the cross-sectional area of ​​the jet section is smaller than the first cross-sectional area S1.

4. A surface cleaning device with a diverter plate according to claim 3, characterized in that: The cross-sectional area of ​​the flow branch decreases continuously from the slow flow section to the jet section.

5. The surface cleaning device with a splitter plate according to claim 2, characterized in that: The final-stage flow-dividing branch is inclined downward from the final-stage flow-dividing inlet to the connected nozzle.

6. The surface cleaning device with a splitter plate according to claim 1, characterized in that: The flow channel is arranged to be higher at the rear and lower at the front, so that the cleaning fluid can flow obliquely downward from the rear to the front in the flow channel.

7. A surface cleaning device with a splitter plate according to claim 6, characterized in that: The center plane of the flow channel has an inclination angle θ relative to the horizontal direction, 5°≤θ≤15°.

8. The surface cleaning device with a diverter plate according to claim 2, characterized in that: The final flow channel branch includes a final transition section forming a final flow diversion inlet, and the angle between the final flow diversion branch and the final transition section is an acute angle.

9. The surface cleaning device with a splitter plate according to claim 1, characterized in that: The nozzle has at least three hole walls which are connected in sequence along the circumferential direction, and the widths of the hole walls of the nozzle are arranged to be different.

10. The surface cleaning device with a splitter plate according to claim 1, characterized in that: The diverter plate is arranged above the cleaning member, and the nozzle is arranged downwardly facing the cleaning member.

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