CLEANING DISC AND ELECTRIC CLEANING APPLIANCE INSTALLED WITH THE SAME

Abstract

A cleaning disc, including an outer brushing disc, a cavity for accommodating an inner brushing disc being provided on the outer brushing disc, at least two first water outlet passages being distributed at intervals along a circumferential direction at a bottom wall of the cavity, the first water outlet passages extending from an edge towards a center of the bottom of the cavity; a second water outlet passage for cleaning the cavity is provided between every two neighboring first water outlet passages. This design increases flow area of the water flow in the cavity, ensuring that each corner in the cavity can be washed by the spinning water flow. The second water outlet passages as added can ensure sufficient discharge of the waste water after the cleaning work is done, which improves the effect of cleaning the inner space of the brushing discs without dismantling the cleaning disc.

Description

FIELD

The disclosure relates to electric cleaning appliances, and more particularly relates to a cleaning disc.

BACKGROUND

An electric cleaning appliance such as a floor sweeper or a floor scrubber is currently indispensable as it not only reduces labor costs on cleaning but also enhances work efficiency and cleanness. Cleaning effect of such cleaning appliances is sometimes dictated by its cleaning disc structure. For example, the invention patent No. CN201410363344.9 discloses a round brush and a high-pressure cleaning appliance comprising the same, the round brush comprising a spray nozzle upper body and a spray nozzle lower body that are securely fitted, the spray nozzle upper body and the spray nozzle lower body jointly forming a blast cavity, a brush disc being fixedly mounted on the spray nozzle lower body, a plurality of bristles being provided on the brush disc, a plurality of water outlets being arranged between the bristles on the brush disc, the spray nozzle lower body being connected to a water feed pipe, a water outlet of the water feed pipe extending into the blast cavity, a gas feed passage communicating with the blast cavity being disposed on the spray nozzle upper body, a pressurizer pressurizing the gas flow fed into the blast cavity being provided between the gas feed passage and the water outlet of the water feed pipe, the pressurizer being located in the blast cavity. The round brush as disclosed has advantages such as reduced energy consumption, reduced water consumption, good washing effect, vehicle body protection, and long service life, and is thus widely applied to clean vehicles.

However, the conventional structure has an uneven water discharge. To ensure strength of the cleaning disc, the pressure of fed water should be controlled because if the water pressure is excessively high, the cleaning disc would be distorted and even damaged, affecting the service life of the overall cleaning appliance. The cleaning disc itself also needs cleaning after service over a long term. However, a conventional cleaning disc has dead self-cleaning zones, so that the cleaning disc needs to be dismantled so as to be cleaned, which is inconvenient. In addition, repeated dismantling for cleaning would also affect the service life of the cleaning appliance.

SUMMARY

The disclosure provides an electric cleaning appliance, and particularly a cleaning disc for such an electric cleaning appliance, to solve the drawbacks that the cleaning disc of a conventional cleaning appliance has an uneven water discharge and a narrow water discharge amount adjustment range and also to facilitate self-cleaning of the cleaning disc.

To this end, a cleaning disc described herein comprises an outer brushing disc, a cavity for accommodating an inner brushing disc being provided on the outer brushing disc, at least two first water outlet passages being distributed at intervals along a circumferential direction at a bottom wall of the cavity, the first water outlet passages extending from an edge towards a center of the bottom wall of the cavity, wherein a second water outlet passage for cleaning the cavity is provided between every two neighboring first water outlet passages. This design increases flow area of the water flow in the cavity, ensuring that each corner in the cavity can be washed by the spinning water flow.

In some implementations, the cavity comprises the bottom wall and a sidewall, the second water outlet passages being arranged on the bottom wall of the cavity and located at an interface between the bottom wall and the sidewall. The second water outlet passages as provided increase the water discharge space on the bottom wall of the cavity and prevent the bottom wall of the cavity from being damaged by water flow impact.

In some implementations, an inner stop rib is formed at a side of each first water outlet passage, the inner stop rib being in intimate contact with the first water outlet passage, a length of the inner stop rib being greater than that of the first water outlet passage.

In some implementations, the first water outlet passage is an individual water outlet channel or formed by a plurality of continuous water outlet holes; the second water outlet passage is also an individual water outlet channel or formed by a plurality of continuous water outlet holes. The first water outlet passages and the second water outlet passages may actually be individual arc-shaped water channels or formed of a plurality of water outlet holes arranged at even intervals; the water outlet holes may be formed of a round shape or an elongated shape with an arc angle. In fact, the elongated water outlet channel has an optimal effect.

In some implementations, the first water outlet passage and the second water outlet passage are connected with each other. The mutual connection ensures that two water outlet passages may be manufactured in one procedure, thereby reducing manufacture costs.

In some implementations, a plurality of arc-shaped sheets are further provided on the outer brushing disc, projections of the arc-shaped sheets in an axial direction of the outer brushing disc circumscribing the cavity of a round shape. The arc-shaped sheets serve to enhance the overall strength of the outer brushing disc, which are generally disposed on the inner side surface of the outer brushing disc.

In some implementations, an inner shaft snap-fitting block is provided in a center of the inner brushing disc; the outer brushing disc is fixed on an outer shaft, the inner brushing disc is fixed on an inner shaft via a connector, and the inner brushing disc is located in the cavity of the outer brushing disc.

In some implementations, a barrier bar is correspondingly provided above each of the first water outlet passages and above each of the second water outlet passages, respectively. This prevents the water flow entering the brushing discs from directly flowing out of the water outlet passages.

In some implementations, the cleaning disc is installed on any one of a floor sweeper, a floor scrubber, an electric cleaning brush, an industrial sweeping robot, a home sweeping robot, or a polishing machine.

The disclosure further provides an electric cleaning appliance, wherein the electric cleaning appliance is installed with the cleaning disc, and the electric cleaning appliance is any one of a floor sweeper, a floor scrubber, an electric cleaning brush, an industrial sweeping robot, a home sweeping robot, or a polishing machine.

Compared with conventional technologies, the structure described herein increases the water discharge amount with cooperation between the first water outlet passages and the second water outlet passages and improves the strength of the surface of the outer brushing disc under high pressure. If the water outlet holes were designed thicker and longer like a conventional technique, the overall surface of the brushing disc would be easily cracked and deformed after being subjected to a pressurized water flow over a long term; in contrast, with additional provision of a set of second water outlet passages, the disclosure enables adjustment of the acting force applied by the water flow against the outer brushing disc to prevent its deformation and also raises the upper limit of the pressure of fed water.

The second water outlet passages as added can ensure sufficient discharge of the waste water after the cleaning work is done, which improves the effect of cleaning the inner space of the brushing discs without dismantling the cleaning disc.

Bristle fixing holes are formed on the cleaning disc. Bristles are generally fixed in the bristle fixing holes via metal wires or by other ways; the cleaning work starts when the bristles are wetted by the water spun out of the water outlet passages, thereby achieving a better cleaning effect. The inner brushing disc is mounted in the center of the outer brushing disc, and the inner and outer brushing discs rotate synchronously in opposite directions; this significantly improves the water discharge effect and cleaning effect, and also achieves the effect of stabilizing the cleaning disc during operation.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a structural schematic diagram of an outer side surface of an outer brushing disc of a cleaning disc according to some embodiments of the disclosure;

FIG. 2 is a structural schematic diagram of a side surface of the outer brushing disc;

FIG. 3 is a structural schematic diagram of an inner side surface of the outer brushing disc;

FIG. 4 is a stereoscopic schematic diagram of the outer brushing disc;

FIG. 5 is a structural schematic diagram of an inner brushing disc of a cleaning disc according to some embodiments of the disclosure;

FIG. 6 is a structural schematic diagram of a side surface of the inner brushing disc;

FIG. 7 is a sectional view of an overall structure of a cleaning disc according to some embodiments of the disclosure;

FIG. 8 is a schematic diagram of an overall structure of a cleaning disc according to some embodiments of the disclosure.

DETAILED DESCRIPTION OF EMBODIMENTS

To make the objectives, technical solutions, and advantages of the disclosure more apparent and comprehensible, the disclosure will be further described in detail through embodiments with reference to the accompanying drawings. It should be understood that the implementations described herein are only intended to explain the disclosure, not for limiting the disclosure.

As illustrated in FIGS. 1 to 4 and 7, a cleaning disc described herein comprises an outer brushing disc 1 and an inner brushing disc 2. The outer brushing disc 1 has two surfaces, i.e., an outer side surface 1A and an inner side surface 1B, where the outer side surface 1A is a surface in matching contact with the inner brushing disc 2, which surface faces downwards when operating.

A cavity 3 for accommodating the inner brushing disc 2 is provided on the outer brushing disc 1; at least two first water outlet passages 6 are arranged circumferentially at intervals at a bottom wall 3A of the cavity 3, the first water outlet passages 6 extending from an edge towards a center of the bottom wall 3A of the cavity 3, a second water outlet passage 8 for cleaning the cavity 3 being provided between every two neighboring first water outlet passages 6. The second water outlet passage 8 serves to increase water flow without reducing strength of the bottom of the cavity 3.

The cavity 3 comprises the bottom wall 3A and a sidewall 15, the second outlet passages 8 being arranged on the bottom wall 3A of the cavity 3 and located at an interface between the bottom wall 3A and the sidewall 15. Seen from the inner side surface 1B of the outer brushing disc 1, a water flow entering the inner side of the outer brushing disc 1 is driven to spin between the two brushing discs due to rotation of the outer brushing disc 1 and the inner brushing disc 2. The cavity 3 is formed with an outer shaft coupling hole; 12 passes of the first water outlet passages 6 are formed on the cavity 3 with the outer shaft coupling hole as the center, the second water outlet passage 8 being arranged between every two neighboring first water outlet passages 6 and along the edge of the cavity 3; bristle fixing holes 13 are formed on an outward extended section, each bristle fixing hole 13 being correspondingly fixed with a bunch of bristles.

In this implementation, the first water outlet passages 6 and the second water outlet passages 8 are all elongated water outlet channels 6A, 8A and connected serially with each other. This facilitates reduction of manufacturing procedures.

An inner stop rib 7 is formed at one side of each first water outlet passage 6, the inner stop rib 7 being in intimate contact with the first water outlet passage 6, a length of the inner stop rib 7 being greater than that of the first water outlet passage 6. To better control the water flow during operation, the inner stop rib 7 on the cavity 3 is of an arc shape, the length of the inner stop rib 7 being ¾˜⅔ of the diameter of the round cavity 3. It is noted that inner stop ribs 7 are provided in the cavities 3 at both of the inner side surface 1B and the outer side surface 1A of the outer brushing disc 1.

It may be seen from the figures that, barrier bars 14 are correspondingly provided above the first water outlet passages 6 and the second water outlet passages 8 on the inner side surface 1B of the outer brushing disc 1. The barrier bars 14 are formed of a strip shape, which are generally disposed on top of the inner stop ribs 7 and the sidewall 15 on the inner side surface 1B of the outer brushing disc 1. The barrier bars 14 can fully cover the first water outlet passages 6 and the second water outlet passages 8. The water flow enters the outer brushing disc 1 from the inner side surface 1B. Without blockage by the barrier bars 14, a fraction of water flow would spin insufficiently and directly flow out of the first water outlet passages 6 or the second water outlet passages 8. Consequently, water dripping would occur during operation, which significantly affects service effect. Therefore, the added barrier bars 14 prevent occurrence of this phenomenon.

As such, due to the centrifugal effect of spinning and the blockage of inner stop ribs 7, a fraction of water flow flows out of the first water outlet passages 6, while the rest of water flow is blocked by the sidewall 15 between the cavity 3 and the outward extended section to flow out of the second water outlet passages 8.

A plurality of arc-shaped sheets 5 are provided on the outward extended section of the outer brushing disc 1, projections of the arc-shaped sheets 5 in an axial direction of the outer brushing disc circumscribing the round cavity 3. The arc-shaped sheets 5 serve to enhance the overall strength of the outer brushing disc 1. The bristle fixing holes 13 are distributed annularly. This ensures mutual matching between the water outlet structure and the cleaning disc structure. Four passes of annularly distributed bristle fixing holes 13 are provided on the outward extended section. The four passes of annularly distributed bristle fixing holes 13 fully cover the entire surface of the outward extended section. For different models of cleaning appliances, an installer may selectively fix the bristles in designated bristle fixing holes 13 to achieve various effects.

As illustrated in FIGS. 5 and 6, the inner brushing disc 2 comprises a disc body, a radius of the disc body being identical to that of the cavity 3 of the outer brushing disc 1, bristle fixing holes 13 being also arranged evenly on the disc body, an inner shaft snap-fitting block 9 being provided in the center of the disc body, the inner shaft snap-fitting block 9 being configured to match and position an inner shaft 12.

The outer brushing disc 1 is fixed on an outer shaft 11, the inner brushing disc 2 is fixed on the inner shaft 12 via a connector 10, and the inner brushing disc 2 is mounted in the cavity 3 of the outer brushing disc 1.

In some other implementations, either the first water outlet passages 6 or the second water outlet passages 8, or both of them, are formed by a plurality of water outlet holes at even intervals, which can also increase the water discharge amount while ensuring strength of the brushing discs; however, compared with elongated water outlet channels, this outlet-hole configuration has a higher manufacturing cost with a smaller water discharge amount. The opening size of the first water outlet passages 6 is inversely proportional to the number thereof. The number of passes of the first water outlet passages is preferably not more than 24. If too many first water outlet passages 6 are arranged, the overall strength of the outer brushing disc 1 would be affected.

Irrespective of which implementations described above being adopted, in actual use, it is only needed to install the cleaning disc on a corresponding cleaning appliance. As illustrated in FIGS. 7 and 8, the outer brushing disc 1 and the inner brushing disc 2 are fixed on different shafts, respectively, but after they are fixed in place, the outward extended section of the outer brushing disc 1 and the inner brushing disc 2 are located on a same plane. During operation, the outer brushing disc 1 and the inner brushing disc 2 rotate synchronously in opposite directions. Conventional cleaning appliances either adopt a single brushing disc or adopt a plurality of brushing discs spinning in a same direction, so that the reactive force generated during cleaning would cause displacement of the entire cleaning appliance, and instable control would also occur even to heavy cleaning appliances. According to this disclosure, the inner brushing disc 2 and the outer brushing disc 1 rotate synchronously in opposite directions, so that during cleaning, the reactive forces generated when they contact the floor would counteract with each other, stabilizing the entire cleaning disc. In further conjunction with sufficient water discharge of the first water outlet passages 6 or the second water outlet passages 8, the bristles would be amply wetted, further reducing friction during cleaning. During spinning, water in the cleaning appliance is evenly distributed in the cavity 3 under the action of centrifugal force, and the water flows in the spaces formed by adjacent inner stop ribs 7 create minute swirls and are finally spun out of the first water outlet passages 6 and second water outlet passages 8. The outward extended section has a high relative linear velocity, so that the spun-out water flows correspondingly wet a relatively large wetting area, while the water amount in a unit area is reduced on the contrary; the spun-out water flows would firstly wet the bristles, ensuring that water does not easily accumulate on the surface of the cleaned object.

Furthermore, with this structure, the two brushing discs can rotate in a same direction but at different speeds. Irrespective of high or low rotating velocity, this structure described herein can ensure an even water discharge, thereby ensuring cleaning effect of the cleaning disc.

The disclosure is mainly applied to an electric cleaning appliance such as a floor sweeper or a floor scrubber. The electric cleaning appliances have different requirements for water discharge amount based on actual circumstances. For a relatively clean floor, the water discharge amount is controlled to wet the floor appropriately to thereby facilitate cleaning, so that no water would be left on the floor after cleaning. The brushing discs as described herein can ensure an even and continuous water discharge with a limited discharge amount even in the case of small water flow, thereby achieving the effect. For an environment with heavy dirt, a large water discharge amount is needed; in this case, it is only needed to increase the water discharge amount of the water outlet passages. In addition, by arranging the first water outlet passages 6 and the second water outlet passages 8 separately, it may ensure that after the water is pressurized, the strength of the entire brushing discs suffices for preventing the brushing discs from being deformed or cracked by the pressurized water, with a more stable operation.

After completion of the operation, the cleaning disc itself also needs cleaning. To self-clean the cleaning disc, it is only needed to add a small amount of water with detergent when feeding water, with the water being spun at a relatively high speed. Under the action of high-speed spinning, the water flow stays longer in the cleaning disc due to the centrifugal force so that it does not easily flow out of the water outlet passages. In addition, the spinning liquid can effectively wash any position of the cleaning disc, thereby preventing dead cleaning zones. After the cleaning disc is sufficiently cleaned, it is only needed to reduce the spinning speed, and then the water flow would naturally flow out of the first water outlet passages 6 and the second water outlet passages 8. Without the second water outlet passages 8, a fraction of dirty water would stay in the cleaning disc upon completion of the cleaning operation, which would affect the cleaning effect. This disclosure needn't dismantle the cleaning disc during the whole self-cleaning process, which is very convenient.

The disclosure further discloses an electric cleaning appliance comprising the cleaning disc. Examples of the electric cleaning appliance include a floor sweeper, a floor scrubber, an electric cleaning brush, an industrial sweeping robot, a home sweeping robot, a polishing machine, etc. Dependent on different appliances, the bristle fixing holes 13 are fixed with bristles or other cleaning accessories. A typical option is to fix the bristles with steel wires, which offers a simple structure, a low cost, and ease of maintenance. Another option is a kit fixed with bristles or cleaning cotton, which is inlaid on the inner side of the outer brushing disc and extends out of the bristle fixing holes 13 to perform the cleaning work.

What have been described are only preferred embodiments of the disclosure, not intended for limiting the disclosure. Any changes, equivalent substitutions, and modifications made within the spirit and principle of the disclosure shall fall within the protection scope of the disclosure.

Claims

1.-10. (canceled)

11. A cleaning disc, comprising

an outer brushing disc,

a cavity for accommodating an inner brushing disc being provided on the outer brushing disc,

at least two first water outlet passages being distributed at intervals along a circumferential direction at a bottom wall of the cavity, the first water outlet passages extending from an edge towards a center of the bottom wall of the cavity, and

wherein a second water outlet passage for cleaning the cavity is provided between every two neighboring first water outlet passages.

12. The cleaning disc of claim 11, wherein the cavity comprises the bottom wall and a sidewall, the second water outlet passages being arranged on the bottom wall of the cavity and located at an interface between the bottom wall and the sidewall.

13. The cleaning disc of claim 11, wherein an inner stop rib is formed at a side of each first water outlet passage, the inner stop rib being in intimate contact with the first water outlet passage, a length of the inner stop rib being greater than that of the first water outlet passage.

14. The cleaning disc of claim 11, wherein the first water outlet passage is an individual water outlet channel or formed by a plurality of continuous water outlet holes; the second water outlet passage is also an individual water outlet channel or formed by a plurality of continuous water outlet holes.

15. The cleaning disc of claim 11, wherein the first water outlet passage and the second water outlet passage are connected with each other.

16. The cleaning disc of claim 11, wherein a plurality of arc-shaped sheets are further provided on the outer brushing disc, projections of the arc-shaped sheets in an axial direction of the outer brushing disc circumscribing the cavity of a round shape.

17. The cleaning disc of claim 11, wherein an inner shaft snap-fitting block is provided in a center of the inner brushing disc, the outer brushing disc is fixed on an outer shaft, the inner brushing disc is fixed on an inner shaft via a connector, and the inner brushing disc is located in the cavity of the outer brushing disc.

18. The cleaning disc of claim 12, wherein a barrier bar is correspondingly provided above each of the first water outlet passages and above each of the second water outlet passages, respectively.

19. The cleaning disc of claim 11, wherein the cleaning disc is installed on any one of a floor sweeper, a floor scrubber, an electric cleaning brush, an industrial sweeping robot, a home sweeping robot, or a polishing machine.

20. An electric cleaning appliance, wherein the electric cleaning appliance is installed with the cleaning disc of claim 11, and the electric cleaning appliance is any one of a floor sweeper, a floor scrubber, an electric cleaning brush, an industrial sweeping robot, a home sweeping robot, or a polishing machine.