Floor brush structure for cleaning machine and cleaning machine

Abstract

The invention relates to a floor brush structure for a cleaning machine and the cleaning machine, the floor brush structure for the cleaning machine comprises a shell and a brush head, the brush head comprises a brush strip and an annular brush disc, the inner periphery of the brush disc is enclosed to form an air passing channel, the brush strip is arranged on the brush disc, at least part of the brush strip is located below the brush disc, and the brush strip is arranged in the shell. The brush strips are arranged in the air passing channel and are in a V shape, the multiple brush strips are arranged in a radial mode with the air passing channel as the center, an air passing channel is formed between every two adjacent brush strips, and the air passing channels are located on the upstream of the air passing channel along a fluid flowing path. And at the moment, the airflow is continuous and does not fall off, so that the liquid drops cannot be separated and fall on the ground to form residual water, the residual water on the ground to be cleaned is reduced, and a better cleaning effect is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of household washing and cleaning, and in particular relates to a floor brush structure for a cleaning machine and the cleaning machine. Background Art

[0002] Currently, cleaning machines are floor scrubbers, vacuum cleaners or sweepers, which mainly adopt a brushing and sweeping method, using a fan to suck the debris on the ground into a separation box inside its separation structure, thereby completing the function of floor cleaning.

[0003] Existing cleaning machines such as the Chinese utility model patent "A roller brush rod, cleaning mechanism and sweeper", whose patent number is ZL202123250101.9 (authorization announcement number is CN216932986U) discloses a roller brush rod, including a first roller brush rod and a second roller brush rod, and there is a gap between the first roller brush rod and the second roller brush rod. The first roller brush rod and the second roller brush rod both adopt a spiral structure. When the roller brush rod rotates, the garbage attached to the roller brush rod can be transferred from both sides to the middle gap.

[0004] The above patent has the following defects:

[0005] 1. When a roller brush is used, it will generate eddy currents to raise dust while rotating. The negative pressure distribution is extremely uneven, and the negative pressure is not effectively utilized. The droplets hit the wall and break back to the ground, leaving a lot of water on the ground.

[0006] 2. The roller brush is large in size and relies on mechanical force (mechanical transmission) to drive the dirt and eventually squeeze the dirt to the air outlet. Although it can remove large particles on the ground, it is not capable of cleaning substances such as water on the ground. The fundamental reason is that there is no airflow between the threads of ordinary spiral roller brushes, and substances with large surface tension cannot be sucked in.

[0007] Therefore, it is necessary to further improve the floor brush structure of the existing cleaning machine. Summary of the invention

[0008] The first technical problem to be solved by the present invention is to provide a floor brush structure for a cleaning machine that reduces the amount of residual water on the floor in view of the current status of the above-mentioned prior art.

[0009] The second technical problem to be solved by the present invention is to provide a cleaning machine having the above-mentioned floor brush structure.

[0010] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: a floor brush structure for a cleaning machine, comprising:

[0011] A shell having a chamber inside, the shell having an air outlet connected to the chamber, and a sewage suction port connected to the chamber at the bottom of the shell, wherein the air outlet is located downstream of the sewage suction port along the fluid flow path;

[0012] A brush head is rotatably disposed in the chamber, with a rotation axis of the brush head arranged vertically, and is used to sweep and brush the floor to be cleaned;

[0013] The brush head comprises a brush strip and an annular brush disc, the inner circumference of the brush disc encloses an air passage, the brush strip is arranged on the brush disc and at least partially located under the brush disc, and is V-shaped, and has a smooth transition connection portion at a position adjacent to the tip of the corner of the brush strip (2), there are multiple brush strips and they are radially arranged with the air passage as the center, an air passage is formed between two adjacent brush strips, and along the fluid flow path, the air passage is located upstream of the air passage.

[0014] When sewage enters each air duct with the air flow, the brush bar adopts a V-shaped structure, which allows the air flow and droplets to be separated and broken and then attached to the protruding surface of the corner of the corresponding brush bar, avoiding the generation of turbulent vortexes. At this time, the air flow is continuous and does not fall off, so the droplets will not separate and fall to the ground to become residual water, thereby reducing the presence of residual water on the ground to be cleaned, achieving a better cleaning effect.

[0015] In order to make the airflow more reliable and continuous, the brush strip includes a first brush segment and a second brush segment connected in sequence from the inside to the outside, the connection between the first brush segment and the second brush segment is the corner of the brush strip, the smooth transition connection portion is a convex portion provided on the second brush segment and protruding away from the second brush segment, and the back of the convex portion is an arc surface. The existence of the arc surface makes the airflow flow more smoothly and better avoids the generation of turbulent vortices.

[0016] Further preferably, the inner side of the arcuate surface is smoothly connected to the outer end of the first brush segment, and the tangent line of the inner side of the arcuate surface and the tangent line of the outer end of the first brush segment are located on the same vertical plane.

[0017] In order to make the airflow more reliably continuous, preferably, the distance OD between the center O of the brush disc and the inner end D of the first brush segment is R1, the distance OB between the connection B between the arc surface and the second brush segment and the center O of the brush disc is R2, and the distance OA between the outer end A of the second brush segment and the center O of the brush disc is R3. The distances R1, R2 and R3 satisfy: 0.3<(R3-R1) / (R2-R1)<1.8.

[0018] In order to make the fluid enter the air passage more smoothly, with the moving direction of the cleaning machine as the front, the angle formed between the second brush segment and the extension line extending along the left and right directions is θ1, and the angle formed between the second brush segment and the extension line extending along the left and right directions is θ2. The angles θ1 and θ2 satisfy: 1.5<θ1 / θ2<3.

[0019] In order to gather the introduced fluid at the inner end of the brush strip, the inner end and outer end of each brush strip are located on the same circle, and the inner end of the brush strip is the inner end of the first brush segment, and the outer end of the brush strip is the outer end of the second brush segment.

[0020] Preferably, the arcuate surface of the brush strip is arranged opposite to the second brush section of the adjacent brush strip, so that the air passage forms a contraction section, thereby accelerating the fluid to enter the air passage.

[0021] In order to allow the fluid to rotate into the air passage and increase the cleaning ability of the ground, all brush strips present a clockwise or counterclockwise rotation direction as a whole, and all smooth transition connection parts present the same rotation direction as the brush strips as a whole.

[0022] In order to increase the cleaning area, with the moving direction of the cleaning machine as the front, there are at least two chambers, which are arranged at intervals along the left and right directions, and each of the chambers corresponds to one brush head.

[0023] In order to improve the cleaning ability of stubborn stains on the floor, the shell is provided with a liquid conducting channel for liquid to pass through so as to wet the floor to be cleaned.

[0024] In order to concentrate the negative pressure in the central air passage, the brush plate is inclined from outside to inside and gradually tilted downward. In this way, the fluid in the air guide channel is guided so that the fluid gradually flows into the air passage from outside to inside. At this time, the sewage will not fall during the process of being sucked away vertically, and there will be no residual water on the ground.

[0025] In order to prevent sewage from falling during the vertical rise, there are at least three brush plates, which are coaxially arranged, arranged at intervals up and down, and connected together by connecting parts. A flow channel is formed between two adjacent brush plates. Along the fluid flow path, the flow channel is located upstream of the air passage. The brush bar is located on the lowest brush plate, and the air passage of each brush plate gradually increases from top to bottom.

[0026] In order to better concentrate the negative pressure in the air passage, the brush plate at the bottom is the first brush plate, the brush plate adjacent to the first brush plate is the second brush plate, and the other brush plates are the third brush plates. The brush strip passes upward through the first brush plate and is connected to the bottom surface of the second brush plate. The first brush plate, the second brush plate and the two adjacent brush strips jointly form an air inlet channel. Along the fluid flow path, the air inlet channel is located upstream of the air passage.

[0027] The spacing of the flow channels along the arrangement direction of the brush discs gradually decreases from the inside to the outside, and the spacing of each flow channel along the arrangement direction of the brush discs shows a trend of gradually decreasing from top to bottom. That is, the spacing between two adjacent brush discs gradually decreases from the inside to the outside, and the spacing between two adjacent brush discs gradually decreases from top to bottom. In this way, when conveying substances such as air and droplets, the spacing between two adjacent brush discs gradually decreases from the inside to the outside, and after entering from the outer periphery of the brush disc, the flow rate of the fluid is accelerated, causing the fluid to gather in the air passage.

[0028] In order to make the negative pressure concentrate at the periphery of the air passage and move downward to the ground, the spacing of the flow channel along the brush plate arrangement direction is defined as d1 and d2 from the inside to the outside, and the spacing between the position of the lower wall plate of the flow channel at the corresponding spacing d1 and the center of the lower wall plate is r1, and the spacing between the position of the upper wall plate of the flow channel at the corresponding spacing d2 and the center of the upper wall plate is r2. The spacings d1, d2, r1 and r2 satisfy: r1 / r2=d2 / d1. The lower wall plate and the upper wall plate of the flow channel are the corresponding brush plates respectively.

[0029] The technical solution adopted by the present invention to solve the above-mentioned second technical problem is: a cleaning machine, including a floor brush structure, a separation structure for separating at least dust and liquid, and a fan, characterized in that: the floor brush structure is the floor brush structure, along the fluid flow path, the separation structure is located between the exhaust port and the fan, and is located downstream of the exhaust port.

[0030] Preferably, the cleaning machine is a sweeper or a scrubber.

[0031] Compared with the prior art, the advantages of the present invention are: when sewage enters each air passage along with the air flow, that is, when sewage is sucked into the chamber along with the air flow, the air flow will generate turbulent vortex, and the brush bar adopts a V-shaped structure, and a smooth transition connection part is provided at a position adjacent to the tip of the V-shaped corner, so that the air flow and the droplets can flow on the smooth transition connection part of the corresponding brush bar after separation and fragmentation, thereby avoiding the generation of turbulent vortex, and at this time, the air flow is continuous and does not fall off, so that the droplets will not separate and fall to the ground and become residual water, thereby reducing the presence of residual water on the ground to be cleaned, and achieving a better cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 Schematic diagram of the structure of the sweeping machine of this embodiment;

[0033] Figure 2 for Figure 1 A cross-sectional view of the middle floor brush structure;

[0034] Figure 3 for Figure 1 A cross-sectional view of the middle floor brush structure from another angle;

[0035] Figure 4 for Figure 1 A schematic diagram of the structure of the middle brush head;

[0036] Figure 5 for Figure 4 A cross-sectional view of

[0037] Figure 6 Schematic diagram of airflow distribution of the brush head in this embodiment. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below with reference to the accompanying drawings.

[0039] like Figure 1 As shown, the cleaning machine of this embodiment is a sweeping machine. The following description takes the direction of travel of the sweeping machine as the front. The sweeping machine includes a floor brush structure, a separation structure for separating at least dust and liquid, and a fan. The separation structure adopts the structure in the prior art and will not be described in detail in this embodiment.

[0040] like Figure 1 and Figure 2 As shown, the floor brush structure includes a shell 1 and a brush head 2. The shell 1 has a chamber 10 inside, and there are at least two chambers 10, which are arranged at intervals along the left and right directions. In the present embodiment, there are four chambers 10. Each chamber 10 corresponds to a brush head 2. The four chambers 10 have the same structure, and the following description will be given by taking one of the chambers 10 and one of the brush heads 2 as an example. The shell 1 has an exhaust port 101 connected to the chamber 10, and the bottom of the shell 1 has a sewage suction port 102 connected to the chamber 10. Along the fluid flow path, the exhaust port 101 is located downstream of the sewage suction port 102. Along the fluid flow path, the separation structure is located between the exhaust port 101 and the fan, and is located downstream of the exhaust port 101.

[0041] like Figure 1As shown, a liquid conducting channel 12 is provided on the housing 1 for liquid to pass through to wet the floor to be cleaned. In this embodiment, the liquid conducting channel 12 is arranged vertically, and a liquid conducting channel 12 is provided between two adjacent chambers 10. In order to supply water to the liquid conducting channel, a water storage box (not shown) is provided above the housing 1. The water storage box has a water outlet connected to the liquid conducting channel 12. Along the water flow path, the water storage box is located upstream of the liquid conducting channel 12.

[0042] like Figure 2 and Figure 3 As shown, the brush head 2 is rotatably arranged in the corresponding chamber 10 under the drive of the motor 6, and is used to sweep the floor to be cleaned. The aforementioned motor 6 is located above the housing 1 and has an output shaft extending downward. The brush head 2 is mounted on the output shaft, and the rotation axis of the brush head 2 is arranged vertically. In this embodiment, the brush head 2 includes a brush strip 22 and a ring-shaped brush disc. The brush disc is in an inclined state that gradually tilts downward from the outside to the inside, and the inner circumference of the brush disc encloses a wind passage 210. There are at least three brush discs, which are coaxially arranged, arranged along the upper and lower intervals, and connected together by a connecting piece. In this embodiment, there are 8 brush discs, and a flow channel 25 is formed between two adjacent brush discs. The inner diameter of the inner circumference of each brush disc gradually increases from top to bottom, that is, the wind passage 210 of each brush disc gradually increases from top to bottom. The spacing between two adjacent brush discs (that is, the spacing of the flow channel 25 along the brush disc arrangement direction) gradually decreases from inside to outside. In this way, the fluid first quickly enters between two adjacent brush discs and converges, and then is sucked into the air passage. The distance between each adjacent brush disc gradually decreases from top to bottom, that is, the distance between each flow channel 25 along the brush disc arrangement direction tends to gradually decrease from top to bottom, that is, the distance between the two adjacent brush discs located above is greater than the distance between the two adjacent brush discs located below. During the operation of the cleaning machine, the design of the above-mentioned brush discs allows a uniform negative pressure area to be formed in the flow channel between each brush disc, and the sewage will not fall during the process of vertical ascent and being sucked away, and the droplets will not break and return to the ground. There is no residual water on the ground, the negative pressure is effectively utilized, and the cleaning rate is high. Figure 5 As shown, the spacing of the flow channel 25 along the brush plate arrangement direction is defined as d1 and d2 from the inside to the outside, and the spacing between the position of the lower wall plate of the flow channel 25 at the corresponding spacing d1 and the center of the lower wall plate is r1, and the spacing between the position of the upper wall plate of the flow channel 25 at the corresponding spacing d2 and the center of the upper wall plate is r2. The spacings d1, d2, r1 and r2 satisfy: r1 / r2=d2 / d1.

[0043] like Figures 1 to 5As shown, the brush strip 22 is located on the lowest brush disc. In the present embodiment, the brush strip 22 is partially located under the brush disc. Specifically, the lowest brush disc is the first brush disc 21a, the brush disc adjacent to the first brush disc 21a is the second brush disc 21b, and the other brush discs are the third brush disc 21c. The brush strip 22 passes upward through the first brush disc 21a and is connected to the bottom surface of the second brush disc 21b. An air inlet channel 24 is formed between the first brush disc 21a, the second brush disc 21b and the two adjacent brush strips 22. Along the fluid flow path, the air inlet channel 24 is located upstream of the air passage 210.

[0044] like Figure 4 As shown, there are multiple brush strips 22 and they are arranged radially with the wind passage 210 as the center. All brush strips 22 are generally clockwise or counterclockwise in rotation. An air passage 23 is formed between two adjacent brush strips 22. Along the fluid flow path, the air passage 23 is located upstream of the wind passage 210. The structures of the above-mentioned brush strips 22 are the same. The following description will be given by taking one of the brush strips 22 as an example. The brush strip 22 is V-shaped and has a smooth transition connection portion at a position adjacent to the tip of the corner of the brush strip 22. In this embodiment, the brush strip 22 includes a first brush segment 221 and a second brush segment 222 connected in sequence from the inside to the outside, and the connection point between the first brush segment 221 and the second brush segment 222 is the corner of the brush strip 22. The smooth transition connection portion is a convex portion 223 disposed on the second brush segment 222 and protruding in a direction away from the second brush segment 222, and the back of the convex portion 223 is an arc surface 2231. The inner side of the arc surface 2231 is smoothly connected to the outer end of the first brush segment 221, and the tangent line of the inner side of the arc surface 2231 and the tangent line of the outer end of the first brush segment 221 are located on the same vertical plane. All the convex parts 223 have the same rotation direction as the brush strip 22 as a whole.

[0045] like Figure 3 As shown, the inner end and the outer end of each brush strip 22 are respectively located on the same circle, and the inner end of the brush strip 22 is the inner end of the first brush segment 221, and the outer end of the brush strip 22 is the outer end of the second brush segment 222. The distance OD between the center O of the first brush disc 21a and the inner end D of the first brush segment 221 is R1, the distance OB between the connection B of the arc surface 2231 and the second brush segment 222 and the center O of the first brush disc 21a is R2, and the distance OA between the outer end A of the second brush segment 222 and the center O of the first brush disc 21a is R3. The distances R1, R2 and R3 satisfy: 0.3<(R3-R1) / (R2-R1)<1.8. The included angle between the second brush segment 222 and the extension line 4 extending in the left-right direction is θ1, and the included angle between the second brush segment 222 and the extension line 4 is θ2. The included angles θ1 and θ2 satisfy: 1.5<θ1 / θ2<3.

[0046] When the airflow enters the air passage 23, the second brush section 222 of the brush strip 22 forces the fluid at the outer edge to separate in advance, forcing the flow to separate suddenly. The curved surface of the convex portion has the function of promoting the fluid to adhere to the suction surface and closing the separated airflow. The fluid separates at the outer end A and forms free streamlines and turbulent vortices. Then the streamlines and vortices hit the connection B and adhere to the curved surface 2231 at the connection B, and flow along the curved surface 2231. Then, after flowing to the inner end D, the strong negative pressure is sucked into the air passage 210.

[0047] The design of the brush head makes the negative pressure 7 concentrated in the air passage 210 and close to the outer periphery of the air passage 210, and the negative pressure 7 moves down to the ground. Figure 6 As shown, in this way, the collected sewage is quickly sucked away by negative pressure, and there is no residual water on the ground.

[0048] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "left", "right", "side", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as illustrations and should not be regarded as limitations.

Claims

1. A floor brush structure for a cleaning machine, comprising: A shell (1) having a chamber (10) inside, the shell (1) having an air outlet (101) connected to the chamber (10), and a bottom of the shell (1) having a sewage suction port (102) connected to the chamber (10), wherein the air outlet (101) is located downstream of the sewage suction port (102) along a fluid flow path; A brush head (2) is rotatably arranged in the chamber (10), with the rotation axis of the brush head (2) arranged vertically, and is used to sweep and brush the floor to be cleaned; It is characterized in that The brush head (2) comprises a brush strip (22) and an annular brush disc, the inner circumference of the brush disc enclosing an air passage (210), the brush strip (22) being arranged on the brush disc and at least partially located below the brush disc, and being V-shaped, and having a smooth transition connection portion at a position adjacent to the tip of the corner of the brush strip (22), the brush strips (22) being provided in plurality and being arranged radially with the air passage (210) as the center, an air passage (23) being formed between two adjacent brush strips (22), and the air passage (23) being located upstream of the air passage (210) along the fluid flow path.

2. The floor brush structure according to claim 1, characterized in that: The brush strip (22) comprises a first brush segment (221) and a second brush segment (222) which are connected in sequence from the inside to the outside; the connection point between the first brush segment (221) and the second brush segment (222) is a corner of the brush strip (22); the smooth transition connection portion is a convex portion (223) which is arranged on the second brush segment (222) and protrudes in a direction away from the second brush segment (222); and the back side of the convex portion (223) is an arcuate surface (2231).

3. The floor brush structure according to claim 2, characterized in that: The inner side of the arcuate surface (2231) is smoothly connected to the outer end of the first brush segment (221), and the tangent line of the inner side of the arcuate surface (2231) and the tangent line of the outer end of the first brush segment (221) are located on the same vertical plane.

4. The floor brush structure according to claim 2, characterized in that: The distance OD between the center O of the brush disc and the inner end D of the first brush segment (221) is R1, the distance OB between the connection B between the arc surface (2231) and the second brush segment and the center O of the brush disc is R2, and the distance OA between the outer end A of the second brush segment (222) and the center O of the brush disc is R3. The distances R1, R2 and R3 satisfy: 0.3<(R3-R1) / (R2-R1)<1.

8.

5. The floor brush structure according to claim 2, characterized in that: With the moving direction of the cleaning machine as the front, the angle formed between the second brush segment (222) and the extension line (4) extending in the left-right direction is θ1, and the angle formed between the second brush segment (222) and the extension line (4) is θ2. The angles θ1 and θ2 satisfy: 1.5<θ1 / θ2<3.

6. The floor brush structure according to claim 2, characterized in that: The inner end and outer end of each brush strip (22) are respectively located on the same circle, and the inner end of the brush strip (22) is the inner end of the first brush segment (221), and the outer end of the brush strip (22) is the outer end of the second brush segment (222).

7. The floor brush structure according to claim 2, characterized in that: The arcuate surface of the brush bar is arranged opposite to the second brush segment of the adjacent brush bar.

8. The floor brush structure according to claim 1, characterized in that: All brush strips (22) present a clockwise or counterclockwise rotation direction as a whole, and all smooth transition connection parts present the same rotation direction as the brush strips (22) as a whole.

9. The floor brush structure according to claim 1, characterized in that: With the moving direction of the cleaning machine as the front, there are at least two chambers (10), which are arranged at intervals along the left-right direction, and each chamber (10) corresponds to one brush head (2).

10. The floor brush structure according to claim 1, characterized in that: The housing (1) is provided with a liquid conducting channel (12) for liquid to pass through so as to wet the floor to be cleaned.

11. The floor brush structure according to any one of claims 1 to 10, characterized in that: The brush plate is in an inclined state gradually tilted downward from the outside to the inside.

12. The floor brush structure according to claim 11, characterized in that: There are at least three brush discs, which are coaxially arranged and spaced apart from each other and connected together by a connecting piece. A flow channel (25) is formed between two adjacent brush discs. Along the fluid flow path, the flow channel (25) is located upstream of the air passage (210). The brush strip (22) is located on the lowest brush disc, and the air passage (210) of each brush disc gradually increases from top to bottom.

13. The floor brush structure according to claim 12, characterized in that: The brush disc located at the bottom is the first brush disc (21a), the brush disc adjacent to the first brush disc (21a) is the second brush disc (21b), and the other brush discs are the third brush discs (21c); the brush strips (22) pass upward through the first brush disc (21a) and are connected to the bottom surface of the second brush disc (21b); the first brush disc (21a), the second brush disc (21b) and the two adjacent brush strips (22) together form an air inlet channel (24); along the fluid flow path, the air inlet channel (24) is located upstream of the air passage (210).

14. The floor brush structure according to claim 13, characterized in that: The spacing between the flow channels (25) along the arrangement direction of the brush disc gradually decreases from inside to outside, and the spacing between the flow channels (25) along the arrangement direction of the brush disc gradually decreases from top to bottom.

15. The floor brush structure according to claim 14, characterized in that: The spacings of the flow channel (25) along the arrangement direction of the brush disc are defined as d1 and d2 from the inside to the outside, and the spacing between the position of the lower wall plate of the flow channel (25) at the corresponding spacing d1 and the center of the lower wall plate is r1, and the spacing between the position of the upper wall plate of the flow channel (25) at the corresponding spacing d2 and the center of the upper wall plate is r2, and the spacings d1, d2, r1 and r2 satisfy: r1 / r2=d2 / d1.

16. A cleaning machine, comprising a floor brush structure, a separation structure for separating at least dust and liquid, and a fan, characterized in that: The floor brush structure is the floor brush structure according to any one of claims 1 to 15, and along the fluid flow path, the separation structure is located between the exhaust port (101) and the fan, and is located downstream of the exhaust port (101).

17. The cleaning machine according to claim 16, characterized in that: The cleaning machine is a sweeping machine or a floor scrubber.

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