Floor brush structure for cleaning machines and cleaning machines

Abstract

This invention relates to a floor brush structure for a cleaning machine and a cleaning machine in general. The floor brush structure includes a housing and a brush head. The brush head includes brush strips and an annular brush disc. An air passage is formed along the inner circumference of the brush disc. The brush strips are disposed on the brush disc and at least partially below it, and are V-shaped. Multiple brush strips are arranged radially around the air passage. An air flow channel is formed between adjacent brush strips, and along the fluid flow path, the air flow channel is located upstream of the air passage. This design avoids the generation of turbulent vortices, ensuring continuous airflow without droplets falling to the ground and becoming residual water, thus reducing the presence of residual water on the surface to be cleaned and achieving a better cleaning effect.

Description

Technical Field

[0001] This invention belongs to the field of household washing and cleaning technology, specifically relating to a floor brush structure for a cleaning machine and the cleaning machine itself. Background Technology

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

[0003] Existing cleaning machines, such as the Chinese utility model patent "A Roller Brush, Cleaning Mechanism and Sweeper", patent number ZL202123250101.9 (authorization announcement number CN216932986U), disclose a roller brush, which includes a first roller brush and a second roller brush. There is a gap between the first roller brush and the second roller brush. Both the first roller brush and the second roller brush adopt a spiral structure. When the roller brush rotates, the garbage attached to the roller brush can be transferred from both sides to the middle gap.

[0004] The aforementioned patent has the following defects:

[0005] 1. Using a roller brush, while rotating, generates eddies that lift up dust. The negative pressure distribution is extremely uneven, and the negative pressure is not effectively utilized. Droplets break upon hitting the wall and return to the ground, resulting in a lot of residual water on the ground.

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

[0007] Therefore, further improvements are needed to the existing floor brush structure of cleaning machines. 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 ground, in light of the existing technology described above.

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

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

[0011] The housing has an internal chamber, an exhaust port communicating with the chamber, and a suction port communicating with the chamber at the bottom. Along the fluid flow path, the exhaust port is located downstream of the suction port.

[0012] A brush head, which is rotatably disposed in the cavity, has its axis of rotation arranged vertically and is used to sweep the floor to be cleaned.

[0013] The brush head is characterized by comprising a brush strip and an annular brush disc, the inner circumference of the brush disc forming an air passage, the brush strip being disposed on the brush disc and at least partially located below the brush disc, and being V-shaped, and having a smooth transition connection at a position near the corner tip of the brush strip (2), the brush strip being multiple and arranged radially around the air passage, an air passage being formed between two adjacent brush strips, and the air passage being located upstream of the air passage along the fluid flow path.

[0014] When wastewater enters each ventilation channel with the airflow, the V-shaped structure of the brush strips allows the airflow and droplets to separate and break up before adhering to the protruding surface at the corner of the corresponding brush strip, avoiding the generation of turbulent vortices. At this time, the airflow 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 and achieving a better cleaning effect.

[0015] To ensure a more reliable and continuous airflow, the brush bar includes a first brush segment and a second brush segment connected sequentially from the inside out. The connection between the first and second brush segments is a corner of the brush bar. The smooth transition connection is a protrusion on the second brush segment that protrudes away from the second brush segment, and the back of the protrusion is an arc-shaped surface. The presence of the arc-shaped surface makes the airflow smoother and better avoids the generation of turbulent vortices.

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

[0017] To ensure a more reliable and continuous airflow, preferably, the distance OD between the center O of the brush disk and the inner end D of the first brush segment is R1, the distance OB between the connection point B of the arc-shaped surface and the second brush segment and the center O of the brush disk is R2, and the distance OA between the outer end A of the second brush segment and the center O of the brush disk is R3. The distances R1, R2, and R3 satisfy: 0.3 < (R3 - R1) / (R2 - R1) < 1.8.

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

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

[0020] Preferably, the arc-shaped surface of the brush bar is arranged opposite to the second brush segment of the adjacent brush bar. This creates a constriction section in the airflow channel, thereby accelerating the entry of fluid into the airflow channel.

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

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

[0023] To improve the ability to clean stubborn stains on the ground, the housing is provided with a liquid channel through which liquid can pass to wet the ground to be cleaned.

[0024] To concentrate negative pressure in the central air passage, the brush disc is tilted downwards from the outside in. This guides the fluid in the air passage, causing it to flow gradually from the outside in. As the wastewater is vertically drawn away, it does not fall back down, leaving no residual water on the ground.

[0025] To prevent sewage from falling during vertical ascent, there are at least three brush discs arranged coaxially and spaced vertically, connected together by connectors. A flow channel is formed between two adjacent brush discs. Along the fluid flow path, the flow channel is located upstream of the air passage. The brush bar is located on the lowest brush disc, and the air passage of each brush disc gradually increases from top to bottom.

[0026] To better concentrate negative pressure within the air passage, the bottommost brush disc is the first brush disc, the brush disc adjacent to the first brush disc is the second brush disc, and the other brush discs are the third brush discs. The brush strips pass upward through the first brush disc and connect to the bottom surface of the second brush disc. The first brush disc, the second brush disc, and the two adjacent brush strips together form an air inlet channel. Along the fluid flow path, the air inlet channel is located upstream of the air passage.

[0027] The spacing between the flow channels along the brush disk arrangement direction gradually decreases from the inside out, and the spacing between each flow channel along the brush disk arrangement direction gradually decreases from top to bottom. That is, the spacing between two adjacent brush disks gradually decreases from the inside out, and the spacing between any two adjacent brush disks gradually decreases from top to bottom. Thus, when conveying substances such as air and droplets, the gradually decreasing spacing between two adjacent brush disks accelerates the fluid velocity after entering from the outer periphery of the brush disk, causing the fluid to accumulate in the air passage.

[0028] To concentrate the negative pressure at the periphery of the air passage and direct it downwards to the ground, the spacing of the flow channels along the brush arrangement direction is defined as d1 and d2 from the inside out. The distance between the lower wall plate of the flow channel at the corresponding spacing d1 and its center is r1, and the distance between the upper wall plate of the flow channel at the corresponding spacing d2 and its center is r2. The spacings d1, d2, r1, and r2 satisfy: r1 / r2 = d2 / d1. The lower and upper wall plates of the flow channel correspond to the brushes.

[0029] The technical solution adopted by the present invention to solve the second technical problem mentioned above 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 aforementioned floor brush structure, along the fluid flow path, and 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 floor scrubber.

[0031] Compared with the prior art, the advantages of the present invention are as follows: When sewage enters each ventilation channel with the airflow, that is, during the process of sewage being drawn into the chamber with the airflow, the airflow will generate turbulent vortices. The brush strip adopts a V-shaped structure, and a smooth transition connection is provided at the position near the tip of the V-shaped corner. This allows the airflow and droplets to flow on the smooth transition connection of the corresponding brush strip after separation and breakup, avoiding the generation of turbulent vortices. At this time, the airflow 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 and achieving a better cleaning effect. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the sweeper in this embodiment;

[0033] Figure 2 for Figure 1 Cross-sectional view of the central brush structure;

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

[0035] Figure 4 for Figure 1 Schematic diagram of the structure of the medium brush head;

[0036] Figure 5 for Figure 4 A sectional view;

[0037] Figure 6 This is a schematic diagram of the airflow distribution of the brush head in this embodiment. Detailed Implementation

[0038] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0039] like Figure 1 As shown, the cleaning machine in this embodiment is a sweeper. The following description refers to the sweeper's direction of travel. The aforementioned sweeper includes a floor brush structure, a separation structure for separating at least dust and liquid, and a fan. The separation structure adopts a structure from the prior art, which will not be described in detail in this embodiment.

[0040] like Figure 1 and Figure 2 As shown, the aforementioned floor brush structure includes a housing 1 and a brush head 2. The housing 1 has at least two chambers 10 arranged at intervals along the left-right direction; in this embodiment, there are four chambers 10. Each chamber 10 corresponds to one brush head 2. The four chambers 10 have identical structures; the following description uses one chamber 10 and one brush head 2 as an example. The housing 1 has an exhaust port 101 communicating with the chambers 10, and the bottom of the housing 1 has a suction port 102 communicating with the chambers 10. Along the fluid flow path, the exhaust port 101 is located downstream of the suction port 102. Along the fluid flow path, a 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, the housing 1 is provided with a liquid guiding channel 12 for the passage of liquid to wet the surface to be cleaned. In this embodiment, the liquid guiding channel 12 is arranged vertically, and a liquid guiding channel 12 is provided between two adjacent chambers 10. In order to supply water into the liquid guiding 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 guiding channel 12. Along the water flow path, the water storage box is located upstream of the liquid guiding channel 12.

[0042] like Figure 2 and Figure 3 As shown, the brush head 2 is rotatably mounted 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 a downwardly extending output shaft. The brush head 2 is mounted on the output shaft, so the rotation axis of the brush head 2 is arranged vertically. In this embodiment, the brush head 2 includes a brush bar 22 and an annular brush disc. The brush disc is inclined from the outside to the inside downward, and the inner circumference of the brush disc forms an air passage 210. There are at least three brush discs, which are arranged coaxially and spaced vertically, and connected together by a connector. In this embodiment, there are eight 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 air passage 210 of each brush disc gradually increases from top to bottom. The distance between two adjacent brush discs (that is, the distance of the flow channel 25 along the brush disc arrangement direction) gradually decreases from the inside to the outside. In this way, the fluid first rapidly enters between two adjacent brush discs and converges, then is drawn into the air passage. The distance between each pair of adjacent brush discs gradually decreases from top to bottom; that is, the spacing of each flow channel 25 along the brush disc arrangement direction gradually decreases from top to bottom. In other words, the distance between two adjacent brush discs located above is greater than the distance between two adjacent brush discs located below. During the cleaning machine's operation, the design of the brush discs creates a uniform negative pressure area in the flow channels between each brush disc. Wastewater does not fall back down as it is vertically drawn away, and droplets do not break up and return to the ground, leaving no residual water on the ground. The negative pressure is effectively utilized, resulting in a high cleaning rate. Figure 5 As shown, the spacing of the flow channel 25 along the brush arrangement direction is defined as d1 and d2 from the inside to the outside. The distance 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. The distance 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 bottommost brush disk. In this embodiment, the brush strip 22 is partially located below the brush disk. Specifically, the bottommost brush disk is the first brush disk 21a, the brush disk adjacent to the first brush disk 21a is the second brush disk 21b, and the other brush disks are the third brush disk 21c. The brush strip 22 passes upward through the first brush disk 21a and connects to the bottom surface of the second brush disk 21b. The first brush disk 21a, the second brush disk 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.

[0044] like Figure 4 As shown, there are multiple brush strips 22 arranged radially around the air passage 210. All brush strips 22 rotate clockwise or counterclockwise as a whole, and an air passage 23 is formed between adjacent brush strips 22. Along the fluid flow path, the air passage 23 is located upstream of the air passage 210. The structures of all the brush strips 22 are the same. The following description uses one brush strip 22 as an example. The brush strip 22 is V-shaped and has a smooth transition connection at the corner tip near 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 sequentially from the inside to the outside. The connection between the first brush segment 221 and the second brush segment 222 is the corner of the brush strip 22. The smooth transition connection is a protrusion 223 provided on the second brush segment 222 and protruding away from the second brush segment 222. The back side of the protrusion 223 is an arc-shaped surface 2231. The inner side of the arc-shaped surface 2231 is smoothly connected to the outer end of the first brush segment 221, and the tangent of the inner side of the arc-shaped surface 2231 and the tangent of the outer end of the first brush segment 221 are located on the same vertical plane. All the protrusions 223 generally present the same direction of rotation as the brush bar 22.

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

[0046] Airflow enters the air passage 23. The second brush section 222 of the brush bar 22 forces the fluid at the outer edge to separate prematurely, causing a sudden flow separation. The arc-shaped surface of the convex part has the function of promoting fluid adhesion to the suction surface and sealing off the separated airflow. The fluid separates at the outer end A, forming free streamlines and turbulent vortices. Then, these streamlines and vortices collide with the connection point B and adhere to the arc-shaped surface 2231 at the connection point B, flowing along the arc-shaped surface 2231. Subsequently, it flows to the inner end D and is drawn into the air passage 210 by the strong negative pressure.

[0047] The design of the brush head described above concentrates the negative pressure 7 within the air passage 210 and near its outer periphery, while the negative pressure 7 is lowered to the ground. See details... Figure 6 As shown, this allows the collected sewage to be quickly sucked away by negative pressure, leaving no residual water on the ground.

[0048] In the specification and claims of this invention, terms indicating direction, such as "front," "rear," "left," "right," and "side," are used to describe various exemplary structural parts and elements of the invention. However, these terms are used herein merely for ease of explanation and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this invention can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be considered as limiting.

Claims

1. A floor brush structure for a cleaning machine, comprising: The housing (1) has a chamber (10) inside, the housing (1) has an exhaust port (101) communicating with the chamber (10), and the bottom of the housing (1) has a suction port (102) communicating with the chamber (10). Along the fluid flow path, the exhaust port (101) is located downstream of the suction port (102). A brush head (2) is rotatably disposed in the chamber (10), the axis of rotation of the brush head (2) is arranged vertically, and is used to sweep the floor to be cleaned; Its features are, The brush head (2) includes a brush strip (22) and an annular brush disk. The inner periphery of the brush disk forms an air passage (210). The brush strip (22) is disposed on the brush disk and is at least partially located below the brush disk. It is V-shaped and has a smooth transition connection at the corner tip near the brush strip (22). There are multiple brush strips (22) and they are arranged radially around the air passage (210). 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 air passage (210).

2. The floor brush structure according to claim 1, characterized in that: The brush bar (22) includes a first brush segment (221) and a second brush segment (222) connected sequentially from the inside to the outside. The connection between the first brush segment (221) and the second brush segment (222) is the corner of the brush bar (22). The smooth transition connection part is a protrusion (223) provided on the second brush segment (222) and protruding in a direction away from the second brush segment (222). The back side of the protrusion (223) is an arc-shaped surface (2231).

3. The floor brush structure according to claim 2, characterized in that: The inner side of the arc-shaped surface (2231) is smoothly connected to the outer end of the first brush segment (221), and the tangent on the inner side of the arc-shaped surface (2231) and the tangent on 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 disk and the inner end D of the first brush segment (221) is R1, the distance OB between the connection point B of the arc surface (2231) and the second brush segment and the center O of the brush disk is R2, and the distance OA between the outer end A of the second brush segment (222) and the center O of the brush disk 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 direction of travel of the cleaning machine as forward, the angle between the second brush segment (222) and the extension line (4) extending in the left and right direction is θ1, and the angle 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 and outer ends of each brush bar (22) are located on the same circle, and the inner end of the brush bar (22) is the inner end of the first brush segment (221), and the outer end of the brush bar (22) is the outer end of the second brush segment (222).

7. The floor brush structure according to claim 2, characterized in that: The arc-shaped 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) are generally rotated clockwise or counterclockwise, and all smooth transition joints are generally rotated in the same direction as the brush strips (22).

9. The floor brush structure according to claim 1, characterized in that: With the direction of travel of the cleaning machine as the front, there are at least two chambers (10) and they are arranged at intervals along the left and right directions. 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 guiding channel (12) for liquid to pass through in order to wet the ground to be cleaned.

11. The floor brush structure according to any one of claims 1 to 10, characterized in that: The brush plate is tilted downwards from the outside in.

12. The floor brush structure according to claim 11, characterized in that: There are at least three brush discs, which are arranged coaxially and spaced vertically, and connected together by connectors. 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 bar (22) is located on the lowest brush disc. 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 plate at the bottom is the first brush plate (21a), the brush plate adjacent to the first brush plate (21a) is the second brush plate (21b), and the other brush plates are the third brush plates (21c). The brush strip (22) passes upward through the first brush plate (21a) and connects to the bottom surface of the second brush plate (21b). The first brush plate (21a), the second brush plate (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 of the flow channels (25) along the brush plate arrangement direction gradually decreases from the inside to the outside, and the spacing of each flow channel (25) along the brush plate arrangement direction gradually decreases from top to bottom.

15. The floor brush structure according to claim 14, characterized in that: The spacing of the flow channel (25) along the brush arrangement direction is defined as d1 and d2 from the inside to the outside. The distance 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. The distance 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.

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. 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 either a sweeper or a floor scrubber.

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