CN115227152B

CN115227152B - Base station of floor cleaning device and cleaning system

Info

Publication number: CN115227152B
Application number: CN202110443661.1A
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Suzhou Ruijiu Intelligent Technology Co ltd
Current assignee: Suzhou Ruijiu Intelligent Technology Co ltd
Priority date: 2021-04-23
Filing date: 2021-04-23
Publication date: 2023-06-16
Anticipated expiration: 2041-04-23
Also published as: CN115227152A

Abstract

The invention discloses a floor cleaning device and a cleaning system, which can perform a blow-drying operation. A cleaning system comprising a floor cleaning device and a base station disposed independently of the floor cleaning device, the floor cleaning device comprising a wiper and an air flow path, the base station comprising: a housing; the air blowing path is arranged on the shell, and a path inlet of the air blowing path is formed by a joint. The air flow path provided in the cleaning device is combined with the blowing path in the base station through the combining port. The floor cleaning device is provided with the suction motor for providing flowing power for air fluid for drying, and a blower is not required to be additionally arranged in the cleaning equipment or the base station, so that the manufacturing cost of the whole cleaning equipment is reduced. The cleaning system can also blow dry the pipeline and the parts along the way when blow-drying the cleaning roller so as to prevent mold from growing at the pipeline and the parts.

Description

Base station of floor cleaning device and cleaning system

Technical Field

The invention relates to the technical field of cleaning equipment, in particular to a base station of a floor cleaning device and a cleaning system.

Background

After the cleaning device is finished, the wiping piece on the cleaning device needs to be cleaned and dried so as to prevent the wiping piece from breeding mould. In this regard, the prior art adopts a method of providing a blow-drying part in a cleaning apparatus or configuring a base station having a blow-drying function.

The method of providing a blow-dry component in a cleaning device has high power requirements for its associated power supply device and is not suitable for cordless cleaning devices. Meanwhile, a blow-drying component is arranged in the cleaning device, so that the volume of the cleaning device is increased, and the miniaturization of the cleaning device is not facilitated. In the method for configuring the corresponding base station in the prior art, a heater and a blower are configured in the base station to add a drying function to the base station, and in order to prevent the motor in the cleaning device from overheating, a corresponding power control device is required to be configured for the blower and the heater, so that the complexity and the manufacturing cost of the base station are increased.

Disclosure of Invention

In order to solve the technical problems of complexity and high manufacturing cost of the base station with a blow-drying function in the prior art, the invention aims to provide the base station of the improved floor cleaning device and the cleaning system.

To achieve the above object, the present invention provides, in one aspect: a base station for a floor cleaning device having a wiper, a suction motor configured to generate a suction force, and a clean air outlet for discharging clean air from the suction motor, the base station comprising: a housing having a first region corresponding to a wiper of the floor cleaning device; and a blowing path disposed on the housing, the path inlet of the blowing path including a junction configured to interface with a clean air outlet of the floor cleaning device, the path outlet of the blowing path being located at the first region.

In the technical scheme, the base station does not need to be additionally provided with a blower, but a blowing path is arranged on the base station, and the blowing path is utilized to guide the clean air discharged from the clean air outlet of the floor cleaning device to the first area so as to realize that the cleaning piece of the floor cleaning device arranged at the first area is dried by utilizing the air; and the base station has simple structure and low manufacturing cost.

In a preferred embodiment, the base station further comprises; the heating element is arranged on the shell and is positioned on the blowing path. In the preferred technical scheme, the heating element is arranged on the base station, so that the temperature of clean air flowing through the blowing path can be effectively provided, and the drying speed of the air to the wiping piece is improved.

In the above preferred technical solution, it is further preferred that the base station includes: the power supply connector is used for being electrically connected with an external power supply, and the heating element is electrically connected with the power supply connector. It may be further preferred that the housing has at least a partially hollow structure and defines a chamber therein, the chamber being located in the blowing path, the heating element being located in the chamber. The scheme has compact structure and is beneficial to miniaturization of the base station.

In a preferred embodiment, the first region includes a recess and a step extending along a periphery of the recess, and the path outlet of the blowing path includes a plurality of holes provided on the step and facing the recess.

In a preferred embodiment, the base station includes a normally closed closure plate movably connected to the housing, the closure plate being arranged such that when the clean air outlet is coupled to the coupling, the closure plate is lifted away by the clean air outlet. The normally closed closing plate is used for preventing dust from falling into the blowing channel.

In another aspect, the present invention provides a cleaning system comprising a floor cleaning device provided with a solution tank for supplying a cleaning fluid, a wiper capable of wiping a floor with the cleaning fluid, an air flow path extending from a dirty fluid inlet to a clean air outlet, and a base station provided independently of the floor cleaning device, the air flow path having a suction motor provided therein, the base station comprising: a housing having a first region corresponding to a wiper of the floor cleaning device; a blower path disposed on the housing, the path inlet of the blower path including a junction configured to interface with a clean air outlet of the floor cleaning device, the path outlet of the blower path being located at the first region; wherein the cleaning system is configured to perform a blow-drying operation on the wiper and wherein the floor cleaning device rests at the base station while the blow-drying operation is performed, the interface interfaces with the clean air outlet, and the suction motor is activated to continuously provide air from the clean air outlet into the blow path.

In the technical scheme of the cleaning system, the air flow path arranged in the floor cleaning device is combined with the blowing path in the base station through the joint, and the suction motor arranged in the cleaning equipment provides flow power for air fluid for drying the wiping piece, so that a blower does not need to be additionally arranged in the cleaning equipment or the base station, and the manufacturing cost of the whole cleaning equipment is reduced.

In a preferred embodiment, the base station further includes: and the heating element is arranged on the shell and positioned on the blowing path so as to heat the air sent into the blowing path from the clean air outlet. This preferred scheme is through increasing heating element in the route of blowing, and it can improve the clean air temperature that enters into in the route of blowing, and it is when carrying out the operation of drying to the wiper, can improve the efficiency of drying of wiper to higher temperature air, when being inhaled by the suction motor in the air flow path, it can also be for pipeline and the part of following the way weathers, in order to prevent breeding mould in pipeline and part department.

In the above preferred aspect, it is further preferred that the cleaning system includes a controller provided on the floor cleaning device, the controller being configured to activate the heating element after a predetermined condition is satisfied.

In the above preferred solution, it may be further preferred that the base station is provided with a power supply connector for electrically connecting with an external power supply, and the heating element is electrically connected with the power supply connector.

In the above preferred embodiment, it may be further preferred that the housing has at least a partially hollow structure and defines a chamber therein, the heating member being located in the chamber, the chamber being located in the blowing path.

In a preferred embodiment, the cleaning system further comprises a human-computer interaction unit that allows a user to perform an input operation during a stay of the floor cleaning device at the base station, so that the user can select to perform a drying operation of the wiper.

In a preferred embodiment, the cleaning system is configured to perform a self-cleaning operation on the wipe with a cleaning fluid, and performing the blow-drying operation is configured to be performed after the self-cleaning operation is completed.

In a preferred embodiment, the wiper comprises a cleaning roller.

In the above preferred embodiment, it is further preferred that the dirty fluid inlet is provided toward the surface to be cleaned, and the cleaning roller is provided at the dirty fluid inlet.

In the above preferred aspect, it may be further preferred that the floor cleaning device includes a base for mounting the cleaning roller, the first region includes a recess for receiving the base and a step extending along a periphery of the recess, and the path outlet of the blowing path includes a plurality of holes provided on the step and directed toward the recess.

In a preferred technical scheme, the floor cleaning device is provided with a battery pack for providing energy, the base station is provided with a charging connector for being electrically connected with the battery pack, and the charging connector is electrically connected with the power supply connector. In the process of drying the cleaning roller, the base station can charge the battery pack on the cleaning device.

In a preferred embodiment, the floor cleaning device is an autonomous mobile floor cleaning robot or a manually operated push-rod floor cleaning machine.

Drawings

FIG. 1 is a schematic view of a cleaning system provided by the present invention;

FIG. 2 is an exploded view of the cleaning device of FIG. 1;

FIG. 3 is an enlarged view of a portion of the exploded view of FIG. 2 at A;

FIG. 4 is an enlarged view of a portion of the exploded view of FIG. 2 at B;

FIG. 5 is a schematic perspective view of a base station of the cleaning system of FIG. 1;

FIG. 6 is a side cross-sectional view of the base station of FIG. 6;

FIG. 7 is a schematic diagram of a controller of the cleaning system shown in FIG. 1.

Detailed Description

In order to describe the technical content, constructional features, objects and effects of the invention in detail, the technical solutions of the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a detailed description of various exemplary embodiments or implementations of the invention. However, various exemplary embodiments may be practiced without these specific details or with one or more equivalent arrangements. Furthermore, the various exemplary embodiments may be different, but are not necessarily exclusive. For example, the specific shapes, configurations, and characteristics of the exemplary embodiments may be used or implemented in another exemplary embodiment without departing from the inventive concept.

Hereinafter, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

Furthermore, spatially relative terms such as "under … …," "under … …," "under … …," "lower," "above … …," "upper," "above … …," "higher," "side" (e.g., as in "sidewall") and the like are used herein to describe one element's relationship to another element(s) as illustrated in the figures. Spatially relative terms are intended to encompass different orientations of the device in use, operation and/or manufacture in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "under" or "beneath" other elements or features would then be oriented "over" the other elements or features. Thus, the exemplary term "below … …" may include both upper and lower orientations. Furthermore, the device may be otherwise positioned (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In this application, unless explicitly specified and limited otherwise, the term "corresponds" means that two objects can form a relative positional relationship between the two objects and that the two objects can be in fluid communication, wherein such relative positional relationship is such that one object is disposed substantially around the outside of a portion of the surface of the other object. For example: "first area corresponding to the wipe of the floor cleaning device" is understood to be: the first region can be in an opposing positional relationship with the scrub roller and the first region can be in fluid communication with the scrub roller, wherein the opposing positional relationship is such that the first region is disposed substantially around an outside of a surface of the scrub roller portion.

In the present application, unless explicitly specified and limited otherwise, the term "coupled" is to be construed broadly, and for example, "coupled" may be either fixedly coupled, detachably coupled, or integrally formed; can be directly connected or indirectly connected through an intermediate medium.

Referring to FIG. 1, a cleaning system 100 provided by the present invention is shown. The cleaning system 100 includes a floor cleaning device 10 for performing a cleaning operation, a base station 20 provided independently of the floor cleaning device 10, and a controller 30 for controlling the operation of the cleaning system 100. In this example, the controller 30 is disposed directly on the floor cleaning device 10.

As shown in fig. 2, the floor cleaning device 10 includes a base 101, a cleaning roller 102 rotatably coupled to the base 101, an upper cover plate 103 detachably coupled to the base 101, a dust collecting box 104 for collecting dirty fluid, a dirty tank 105 for storing the dirty fluid, a solution tank 107 for supplying the cleaning fluid, an air flow path 11 located inside the floor cleaning device 10, a suction motor 106 located on the air flow path 11, and a battery pack 109 for supplying power to the floor cleaning device 10. The floor cleaning apparatus 10 further includes an upright body 110 hinged to the base 101, and a sewage tank 105, a suction motor 106, and a solution tank 107 are provided on the upright body 110. In other embodiments, the upper cover plate may also be provided integrally connected with the housing.

Please refer to fig. 3 and fig. 4. The base 101 and the upper cover 103 together define a dirty liquid suction inlet 111, and the cleaning roller 102 is disposed at the dirty liquid suction inlet 111 and has a circumferential surface that passes out of the dirty liquid suction inlet 111 to be in contact with a surface to be cleaned. The upper cover plate 103 is provided with a wiping strip 1031 in contact with the surface of the cleaning roller 102, and the wiping strip 1031 is used for wiping off dirty fluid adhering to the surface of the cleaning roller 102. The dust box 104 is disposed between the cleaning roller 102 and the base 101 and combined with the base 101, and a bottom housing of the dust box 104 extends below the wiping strip 1031 to receive the dirty fluid scraped by the wiping strip 1031. The floor cleaning device 10 is arranged with a suction channel 112 for fluidly connecting the dust box 104 with the sewage tank 105. The suction motor 106 is disposed on the upper side of the sewage tank 105 and is adjacent to the sewage tank 105, and a vent hole (not shown) for allowing the suction motor 106 to be in fluid communication with the sewage tank 105 is provided on a lower side end surface of the suction motor 106. In other embodiments, the floor cleaning device may not have a dust box, and the bottom housing of the base extends toward the cleaning roller and contacts the surface of the cleaning roller to receive dirty fluid scraped off by the scraper bar.

In operation of the floor cleaning device 10, the solution tank 107 supplies cleaning fluid to the cleaning roller 102, and the cleaning roller 102 cleans a surface to be cleaned. The dirty fluid attached to the rotating cleaning roller 102 is scraped off by the scraper bar 1031 and drops down along the scraper bar 1031 onto the dust box 104 by the surface tension. The suction motor 106 is activated and creates a negative pressure at the sump 105, under which the dirty fluid located in the dust box 104 reaches and is stored in the sump 105 through the suction channel 112.

The path inlet of the air flow path 11 is formed by the dirty liquid inlet 111. The air path 11 includes an exhaust section 113 formed by the upstanding body 110 and a clean air outlet 114 forming the path outlet of the air path 22. The exhaust section 113 is used to direct exhaust from the suction motor 106 into the clean air outlet 114. In this example, the cleaning apparatus 10 is a hand-held push rod type, and in other embodiments, the cleaning apparatus may be an automatic cleaning device. It should be noted that the air flow path may be formed by a duct arrangement or by a housing of the cleaning apparatus, and the specific path arrangement thereof should not be construed as limiting the scope of the present application on the premise that the air flow path passes through the cleaning roller and the suction motor.

As shown in fig. 5 and 6, the base station 20 includes a housing 21, a blowing path 22, a heating element 23, and a power supply connector 24. The housing 21 includes a first portion 211 and a second portion 212 connected substantially perpendicularly to the first portion 211, the second portion 212 being located on the lower side of the first portion 211. The second portion 212 has a first region 2121 corresponding to the cleaning roller 102 of the floor cleaning device 10 and a second region 2122 adjacent to the first region 2121. Wherein the second region 2122 is closer to the first portion 211 than the first region 2121. The second region 2122 is configured such that when the floor cleaning device 10 is placed on the base station 20, the second region 2122 contacts the chassis 101 to support the floor cleaning device 10. First region 2121 includes a recess 2124 for receiving cleaning roller 102 and a step 2123 extending circumferentially upward along recess 2124.

The blowing path 22 includes a coupling port 221 forming a path inlet, a blowing passage 222 fluidly connected to the coupling port 221, and a plurality of holes 223 forming a path outlet. The coupling opening 221 is located on the upper end surface of the first portion 211 and is provided with a normally closed closing plate (not shown) elastically coupled to the housing 21, the normally closed closing plate being used to close the coupling opening 221 to prevent dust from falling into the blowing passage 222. The closure plate is arranged such that when the clean air outlet 114 is coupled to the coupling opening 221, the clean air outlet 114 is able to push the closure plate apart, thereby enabling fluid communication of the exhaust section 113 with the blowing channel 222. The blowing duct 222 is located inside the housing 21 and is formed by the housing 21. The second portion 212 has a cavity (not shown) formed therein on the air blowing passage 222 for placing the heating element 23. The plurality of apertures 223 are disposed on the step 2124 and are configured such that when the cleaning roller 102 rests in the first region 2121, the plurality of apertures 223 face the cleaning roller 102 to direct the flowing air fluid toward the cleaning roller 102. The first portion 211 of the housing 21 is further provided with a charging connector 25 electrically connectable with the battery pack 109, and the power supply connector 23 is electrically connected with the heating element 23 and the charging port 25, respectively. In other embodiments, the blowing path may be partially or wholly disposed on the housing through a pipe, and the specific structure and the disposition thereof do not limit the protection scope of the present application on the premise that the heating element is located on the blowing path.

In addition, in other embodiments, a heating element is not arranged, and the air entering the blowing path is sent to the path outlet as it is, so that the cleaning roller can be dried; and since the air escaping from the clean air outlet originates from the suction motor, the air self-carries a certain temperature. The electric energy can be saved without the heating element, but the drying speed is obviously lower than that of a machine provided with the heating element.

As shown in fig. 7, the controller 30 is respectively signal-connected with the heating element 23, the suction motor 106, and the like to control the cleaning system 100. The control part 30 can control the cleaning system 100 to perform a self-cleaning operation and a blow-drying operation. The cleaning system 100, when performing a self-cleaning operation, is capable of self-cleaning the cleaning roller 102 using the cleaning solution from the solution tank 109 and recovering the cleaned dirty fluid to the dirty tank 105. The cleaning system 100 is capable of utilizing air from the clean air outlet 114 to effect drying of the cleaning roll 102 when performing a drying operation. The controller 30 is further in signal connection with a man-machine interaction unit 31 for user operation, and the man-machine interaction unit 31 is provided with a selection unit (not shown in the figure) for the user to select to independently perform self-cleaning operation, or to independently perform blow-drying operation or to sequentially perform self-cleaning blow-drying operation, wherein when the self-cleaning blow-drying operation is sequentially performed, the blow-drying operation is set to run after the self-cleaning operation is finished. It should be noted that the man-machine interaction unit may be disposed on a floor cleaning device of the cleaning system, or may be disposed on the base station, or may be disposed as a remote controller or a user mobile phone, where the specific manner of setting is not limited to the protection scope of the application.

The principle of operation of the cleaning system 100 when drying the cleaning roll 102 will now be described. The cleaning device 10, which requires drying of the cleaning roll 102, is placed on the base station 20, wherein the cleaning roll 102 is placed in the first area 2121. The controller 30 activates the suction motor 105 and the exhaust of the suction motor 105 reaches the bond head 114 through the exhaust section 113. The air fluid from the bonding head 114 enters the air blowing passage 222 through the bonding port 221, and the air flow in the air blowing passage 222 is heated by the heating element 23 to dry hot air as it passes through the cavity. The dried hot air leaves the air blowing path 22 from the air discharge hole 223 to the first region 2121 and effects drying of the cleaning roller 102 located at the first region 2121. Thereafter, the dried hot air fluid sequentially flows through and dries the upper cover plate 103, the dust box 104, the suction passage 221, and the sump 105. Finally, the air fluid reaches the suction motor 105 to complete one cycle. During this process, the cleaning roller 102 is rotated so that the hot air flowing through the cleaning roller 102 uniformly dries the cleaning roller 102. In other embodiments, the recesses may also be configured as empty slots to direct a portion of the hot dry air after passing over the heating element to blow dry the scrub roller through the recesses.

The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.

Claims

1. A base station for a floor cleaning device (10) having a wiper (102), a suction motor (106) configured to generate a suction force, and a clean air outlet (114) for discharging clean air from the suction motor (106), characterized in that the base station (20) comprises:

a housing (21), said housing (21) having a first region (2121) corresponding to a wiper (102) of said floor cleaning device (10); and

-a blowing path (22) provided on said housing (21), the path inlet of said blowing path (22) comprising a junction (221), said junction (221) being configured to be capable of interfacing with a clean air outlet (114) of said floor cleaning device (10), the path outlet of said blowing path (22) being located at said first region (2121); wherein said floor cleaning device (10) is docked at said base station, said suction motor (106) is activated to continue to provide air from said clean air outlet (114) into said blowing path (22) for drying said wipes (102).

2. A base station for a floor cleaning device according to claim 1, characterized in that the base station (20) comprises: and the heating element (23), the heating element (23) is arranged on the shell (21) and is positioned on the blowing path (22).

3. A base station for a floor cleaning device according to claim 2, characterized in that the base station (20) comprises: the heating element (23) is electrically connected with the power supply connector (24).

4. A base station for a floor cleaning device according to claim 2, characterized in that the housing (21) has at least partially a hollow structure and defines a chamber inside, the heating element (23) being located in the chamber, the chamber being located in the blowing path (22).

5. The base station for a floor cleaning device according to claim 1, wherein the first area (2121) comprises a recess (2122) and a step (2123) extending along a periphery of the recess (2122), and the path outlet of the blowing path (22) comprises a plurality of holes (223) provided on the step (2123) and facing the recess (2122).

6. A base station for a floor cleaning device according to claim 1, wherein the base station (20) comprises a normally closed closure plate (221) movably connected to the housing (21), the closure plate (221) being arranged such that when the clean air outlet (114) is coupled to the coupling opening (221), the closure plate (211) is lifted by the clean air outlet (114).

7. A cleaning system comprising a floor cleaning device (10) and a base station (20) arranged independently of the floor cleaning device (10), the floor cleaning device (10) being provided with a solution tank (107) for supplying a cleaning fluid, a wiper (102) capable of wiping the floor with the aid of the cleaning fluid, an air flow path (11) extending from a dirty fluid inlet (111) to a clean air outlet (114), the air flow path (11) being provided with a suction motor (106), characterized in that the base station (20) comprises:

a housing (21), said housing (21) having a first area (2121) corresponding to the bottom of said floor cleaning device (10); and

-a blowing path (22), said blowing path (22) being arranged on said housing (21), a path inlet of said blowing path (22) comprising a junction (221), said junction (221) being configured to interface with a clean air outlet (114) of said floor cleaning device (10), a path outlet of said blowing path (22) being located at said first area (2121);

wherein the cleaning system (100) is configured to perform a blow-drying step on the wiper (102), and wherein the floor cleaning device (10) is positioned at the base station (20) while the blow-drying step is performed, the interface (221) interfaces with the clean air outlet (114), and the suction motor (106) is activated to continuously provide air from the clean air outlet (114) into the blow path (22).

8. The cleaning system of claim 7, wherein the base station (20) further comprises: and the heating element (23) is arranged on the shell (21) and positioned on the blowing path (22) so as to heat the air fed into the blowing path (22) from the clean air inlet (114).

9. The cleaning system of claim 8, wherein the cleaning system (100) comprises a controller (30), the controller (30) being disposed on the floor cleaning device (10), the controller (30) being configured to activate the heating element (23) upon satisfaction of a predetermined condition.

10. The cleaning system according to claim 8, wherein the base station (20) is provided with a power supply connector (24) for electrically connecting with an external power supply, and the heating element (23) is electrically connected with the power supply connector (24).

11. The cleaning system of claim 8, wherein said housing (21) is at least partially hollow and defines a chamber therein, said heating element (23) being located within said chamber, said chamber (222) being located in said blowing path (22).

12. The cleaning system according to claim 7, wherein the floor cleaning system (100) further comprises a human-machine interaction unit (31) allowing a user to perform an input operation during a stay of the floor cleaning device (10) at the base station (20) to enable the user to select a blow-drying operation of the wiper (102).

13. The cleaning system of claim 7, wherein the cleaning system (100) is configured to perform a self-cleaning operation on the wiper (102) with a cleaning fluid, and performing the blow-drying step is configured to be after performing the self-cleaning operation is completed.

14. The cleaning system of claim 7, wherein the wiper (102) comprises a cleaning roller.

15. The cleaning system according to claim 14, wherein the dirty fluid inlet (111) is arranged towards the surface to be cleaned, and the cleaning roller (102) is arranged at the dirty fluid inlet (111).

16. The cleaning system of claim 14, wherein the floor cleaning device (10) includes a base (101) for mounting the cleaning roller (102), the first region (2121) includes a recess (2122) for receiving the cleaning roller (102) and a step (2123) extending along a periphery of the recess, and the path outlet of the blowing path (22) includes a plurality of apertures (223) disposed on the step (2123) and oriented toward the recess (2122).

17. The cleaning system according to claim 7, characterized in that the floor cleaning device (10) is provided with a battery pack (109) for supplying energy, and that the base station (10) is provided with a charging connector (25) for electrically connecting with the battery pack (109).

18. The cleaning system of claim 7, wherein the floor cleaning device (10) is an autonomously moving floor scrubbing robot or a manually operated push-stick floor scrubbing machine.