CN113796791B

CN113796791B - Surface cleaning apparatus

Info

Publication number: CN113796791B
Application number: CN202010537061.7A
Authority: CN
Inventors: 卞庄
Original assignee: Suzhou Ruijiu Intelligent Technology Co ltd
Current assignee: Suzhou Ruijiu Intelligent Technology Co ltd
Priority date: 2020-06-12
Filing date: 2020-06-12
Publication date: 2022-05-27
Anticipated expiration: 2040-06-12
Also published as: CN113796791A

Abstract

The invention discloses a surface cleaning apparatus comprising: a body including a suction device; a cleaning base connected to the body and adapted to move over a surface to be cleaned, the cleaning base comprising a housing, at least one cleaning roller capable of being wetted by a cleaning liquid, and a soil box disposed within the housing and arranged to be capable of receiving soil and dirt; a cleaning liquid supply unit comprising a cleaning liquid supply tank, a first cleaning liquid dispenser and a second cleaning liquid dispenser in fluid communication with the cleaning liquid supply tank, the first cleaning liquid dispenser being arranged and adapted to apply a cleaning liquid to the surface to be cleaned and/or the cleaning roller, the second cleaning liquid dispenser being arranged and adapted to rinse at least part of the inner wall surface of the contamination box with the cleaning liquid. This case equipment is applicable to through addding and is used for the second cleaning solution distributor that can utilize the cleaning solution to wash at least partial internal face of dirty liquid box for the user can realize wasing dirty liquid box, and is clean more convenient.

Description

Surface cleaning apparatus

Technical Field

The present invention relates to a surface cleaning apparatus, and more particularly, to a surface cleaning apparatus that performs cleaning by applying a cleaning liquid to a surface to be cleaned and recovers a dirty liquid after the cleaning.

Background

Floor cleaning appliances are known, for example, in the form of floor washers, in which one or more cleaning rollers rotating along a horizontal axis are used as cleaning tools, which contact the floor to be cleaned and clean the floor with the aid of cleaning liquid. The cleaning liquid is stored in a cleaning liquid supply container and applied to the floor surface during the cleaning process. The applied cleaning liquid, together with the cleaned dirt (which may include dirt, dust, stains, mud, hair and other debris), is then drawn from the floor and transferred into a dirt liquid receptacle by the action of the cleaning roller and suction assembly.

Chinese patent publication No. CN209463915U discloses a surface cleaning apparatus comprising an upright handle assembly and a cleaning head mounted on the upright handle assembly and adapted to be moved over a surface to be cleaned; a fluid delivery system and a fluid recovery system that extracts fluid and debris from a surface. The fluid recovery system generally includes a recovery tank, a nozzle adjacent the surface to be cleaned and in fluid communication with the recovery tank through a working air conduit, and a suction source in fluid communication with the working air conduit to draw cleaning fluid from the surface to be cleaned and through the nozzle and the working air conduit to the recovery tank. The recovery tank is periodically emptied of the collected fluid and debris, such as by removing the recovery tank from the device and pouring the collected fluid and debris into a sink, toilet, or other discharge device.

Patent document WO2017059600a1 discloses a floor cleaner provided with a cleaning cylinder, a water tank, a clean water supply device, a sewage tank, and an air pump. The water tank sealing cover is buckled on the surface of the cleaning cylinder, and the water tank is clean. The sewage case has the cavity that is used for the storage to retrieve sewage, and the last distributed of cavity is equipped with sewage import and extraction opening, sewage import and basin intercommunication, and the induction port of air pump and the extraction opening intercommunication of sewage case.

While wet-type surface cleaning devices of the type described above have advanced sufficiently in various respects, it is still desirable, based on consumers, to develop new configurations of surface cleaning devices to meet the needs of use.

Disclosure of Invention

In order to solve the above technical problem, it is an object of the present invention to provide an improved surface cleaning apparatus.

In order to achieve the purpose of the invention, the invention adopts the following technical scheme: a surface cleaning apparatus comprising: a suction device; a cleaning base adapted to be moved over a surface to be cleaned, said cleaning base comprising a housing, at least one cleaning roller capable of being wetted by a cleaning liquid, and a dirt box disposed within said housing and arranged to receive dirt liquid and dirt; cleaning liquid supply unit, including the cleaning liquid supply tank that is used for the storage cleaning liquid, with first cleaning liquid distributor and second cleaning liquid distributor of cleaning liquid supply tank fluid intercommunication, first cleaning liquid distributor be arranged to be applicable to with the cleaning liquid apply to treat clean surface and/or the cleaning roller, second cleaning liquid distributor be arranged to be applicable to utilize the cleaning liquid is right at least some internal face of dirty liquid box washes.

In an advantageous embodiment, the dirty-liquid tank is arranged adjacent to the rear side of the cleaning roller, and is configured to receive dirty liquid and dirt removed from the floor surface to be cleaned by the rotating cleaning roller.

In an advantageous embodiment, the second cleaning liquid dispenser comprises at least one outlet opening.

It may be particularly advantageous that the outlet opening is oriented to spray at least cleaning liquid onto the inner bottom surface of the dirt tray.

It is particularly advantageous if the second cleaning liquid distributor comprises a pair of outlet openings, which are arranged opposite one another.

In a very particularly advantageous manner, the outlet opening can be designed to direct the spray of cleaning liquid from the horizontal downwards at an angle of 10 ° to 80 °.

It is also particularly advantageous that said waste liquid container comprises a pair of oppositely disposed left and right side walls, and that a pair of said outlet openings are arranged in the lower part of said left and right side walls, respectively.

In a further advantageous embodiment, the dirty liquid tank comprises a rear side wall and a bottom wall, and the dirty liquid tank comprises a suction opening arranged at the intersection of the rear side wall and the bottom wall and in fluid communication with the dirty liquid receptacle.

In a further advantageous embodiment, the inner wall surface of the bottom wall is at least partially a ramp surface that slopes downward and rearward.

In an advantageous embodiment, the cleaning liquid supply tank further comprises a flow path control device for supplying the cleaning liquid in the cleaning liquid supply tank to the first cleaning liquid distributor and for supplying the cleaning liquid in the cleaning liquid supply tank to the second cleaning liquid distributor.

In an advantageous embodiment, the flow path control device is configured to provide a greater liquid flow rate when the cleaning liquid in the cleaning liquid supply tank is supplied to the second cleaning liquid dispenser than when the cleaning liquid in the cleaning liquid supply tank is supplied to the first cleaning liquid dispenser.

In a further advantageous embodiment, the flow path control device comprises a first liquid pump arranged between the cleaning liquid supply tank and the first cleaning liquid distributor, a second liquid pump arranged between the cleaning liquid supply tank and the second cleaning liquid distributor, and a control unit for controlling the operation of the first liquid pump and the second liquid pump.

Preferably, the cleaning device further comprises a machine body, the cleaning base is connected to the machine body, the first liquid pump is installed in the machine body, and the second liquid pump is installed in the cleaning base.

In an advantageous embodiment, the sewage treatment device further comprises a sewage storage box, wherein the capacity of the sewage storage box is larger than that of the sewage box; the surface cleaning apparatus is arranged to transfer at least part of the soiled liquid and dirt located behind the soiled liquid container to the soiled liquid holding tank by means of the suction device.

In a particularly advantageous manner, the dirty liquid storage box can be detachably arranged on the machine body.

In an advantageous embodiment, the waste liquid box is detachably arranged on the shell.

According to the surface cleaning equipment, the second cleaning liquid distributor which is suitable for flushing at least part of the inner wall surface of the dirty liquid box by using the cleaning liquid is additionally arranged, so that a user can clean the dirty liquid box, and the cleaning requirement on the dirty liquid box is met.

Drawings

FIG. 1 is a perspective view of a surface cleaning apparatus according to one embodiment of the present invention, wherein the body is in an upright storage position;

FIG. 2 is a second perspective view of the surface cleaning apparatus according to one embodiment of the present invention, with the body in a rearwardly tilted use position;

FIG. 3 is an exploded view of a surface cleaning apparatus according to one embodiment of the present invention, wherein a cleaning solution supply tank and a dirty solution recovery tank on the body are separated from the housing;

FIG. 4 is a cross-sectional view of a cleaning base of the surface cleaning apparatus of FIG. 2;

FIG. 5 is a second exploded view of the surface cleaning apparatus according to one embodiment of the present invention, wherein the cleaning solution supply tank and the dirty solution recovery tank are separated from the housing of the body, and the upper cover and the dirty solution box are separated from the housing of the cleaning base;

FIG. 6 is a perspective view of the waste bin of FIG. 5 from a bottom perspective;

FIG. 7 is an enlarged view of FIG. 6 at A;

FIG. 8 is a cross-sectional view through the upper cover taken along the direction B-B in FIG. 5;

figure 9 is a perspective view of a waste fluid cassette according to one embodiment of the present invention,

FIG. 10 is a cross-sectional view of the waste bin of FIG. 9 taken along the line C-C;

FIG. 11 is a schematic view of a cleaning liquid supply unit of a surface cleaning apparatus according to an embodiment of the present invention;

FIG. 12 is a schematic diagram of a dirty liquid recovery unit of a surface cleaning apparatus according to one embodiment of the present invention.

Detailed Description

For the purpose of illustrating the technical content, the constructional features, the achieved objects and the effects of the invention in detail, reference will be made to the following detailed description of the embodiments in conjunction with the accompanying drawings.

Fig. 1, 2 are schematic diagrams illustrating a surface cleaning apparatus 10 according to one embodiment of the present invention. Surface cleaning apparatus 10 includes a housing 11 and a cleaning base 12. The surface cleaning apparatus 10 of this example is an upright cleaning apparatus, and the machine can be held upright after use.

Surface cleaning apparatus 10 the cleaning base 12 is supported on and movable along the surface to be cleaned during cleaning of the surface to be cleaned. The lower portion of the machine body 11 is pivotally mounted to the cleaning base 12, and the machine body 11 is rotatable relative to the cleaning base 12 between an upright rest position (as in fig. 1) and a rearwardly inclined use position (as in fig. 2).

In other embodiments, surface cleaning apparatus 10 is not limited to being an upright type, and may be a horizontal, portable, etc. type of apparatus.

A cleaning liquid supply unit and a dirty liquid recovery unit are arranged on the surface cleaning apparatus 10. And a cleaning liquid supply unit for storing externally supplied cleaning liquid, the cleaning liquid supply unit at least including a cleaning liquid supply tank 3 for storing the cleaning liquid. A dirty liquid recovery unit for removing dirty liquid into which used cleaning liquid is converted from a surface to be cleaned and removing solid waste on the surface to be cleaned, and storing the dirty liquid and the solid waste for a certain time; the dirty liquid recovery unit includes at least a dirty liquid recovery tank 4 for storing dirty liquid and solid waste for a certain period of time.

For purposes of description in relation to the figures, the terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", and derivatives thereof are used with respect to the direction in which a user pushes surface cleaning apparatus 10 over a surface to be cleaned (i.e., the back-to-front pushing direction), from a defined positional relationship. As used herein, the term "rear side" refers to a location that is rearward of at least one other component, but does not necessarily mean rearward of all other components. It is to be understood, however, that the invention may assume various alternative orientations, except where expressly specified to the contrary.

Referring to fig. 1, a handle 13 is mounted on the top of the body 11 for a user to hold. The handle 13 includes an arcuate grip 14. An operator may hold surface cleaning apparatus 10 with one hand using arcuate handle 14 and thereby urge cleaning base 12 of surface cleaning apparatus 10 back and forth across the surface to be cleaned in the condition of figure 2. In other embodiments, the handle may further comprise a user interface comprising one or more operating elements, such as, but not limited to, buttons, triggers, switches, etc., by which the surface cleaning apparatus can control the operation of all controlled components in the surface cleaning apparatus, such as being switched on or off for cleaning operations, delivery regulation of cleaning liquid, power regulation of the suction device, etc. In other embodiments, the user interface may be located elsewhere on the surface cleaning apparatus, such as on a top wall or side wall of the body below the handle.

Referring to fig. 3, the body 11 further includes a housing 15, and the housing 15 is a skeleton portion of the body 11 and mainly functions to receive or carry the rest of the components on the body 11. Such as carrying suction devices, handles, cleaning fluid supply tanks, waste fluid recovery tanks, etc. In this example, a suction device 2 is fixedly provided in the middle of the casing 15, and a cleaning liquid supply tank 3 and a foul liquid recovery tank 4 are detachably supported in the upper and lower portions of the casing 15, respectively.

The suction device 2 is a suction force forming member belonging to the dirty liquid recovery unit, and is used for generating a force for flowing the dirty liquid. The suction device 2 of the present example comprises a suction electric machine constituted by a motor/wind wheel assembly arranged in the casing 15. The suction motor is capable of providing a suction force extending to the cleaning base. The suction device 2 is in fluid communication with the dirty liquid storage tank 4 through an upper suction passage 21 (see fig. 12). Besides the upper suction passage 21, the dirty liquid recovery unit further has a lower suction passage 22 (see fig. 12) passing through the housing 15 and leading to a transfer chamber 190 (see fig. 12) of the cleaning base 12 from the dirty liquid storage box 4, that is, the suction device 2, the suction passage 21, the dirty liquid recovery box 4, the lower suction passage 22, and the transfer chamber 190 of the cleaning base 12 are sequentially communicated.

In other embodiments, the suction device may also comprise a pump, under the action of which the transfer of the dirty liquid or solid-liquid mixture in the transfer chamber mentioned below into the dirty liquid recovery tank is effected, and according to this arrangement the pump will be placed between the transfer chamber and the dirty liquid recovery tank.

The cleaning liquid supply tank 3 comprises at least one chamber for holding cleaning liquid. In other embodiments, the cleaning liquid supply tank may further comprise a plurality of chambers. The cleaning liquid may be water or a detergent mixed solution mixed with a detergent. The cleaning liquid supply tank 3 of this example is detachably mounted to the cabinet 15. The user can replenish the cleaning liquid supply tank 3 with cleaning liquid at any time as required.

The dirty liquid recovery tank 4 is mounted on the lower front side of the cabinet 15, and the dirty liquid recovery tank 4 is detachably mounted to the front of the cabinet 15. This structure can be convenient for the user to carry out the evacuation processing to foul solution collection box 4 as required at any time. In other embodiments, the dirty liquid recovery tank may be installed at other positions, even at any position on the housing 15.

The main body 11 includes the above components, and a rechargeable battery pack 5 is mounted on the housing 15. In this embodiment, the battery pack 5 is mounted on the lower rear side of the housing 15, i.e., on the rear side of the waste liquid recovery tank 4. The battery pack 5 can power all components of the surface cleaning apparatus 10, such as the suction device 2, that need to consume electrical energy when in operation. In other embodiments, a power plug capable of being electrically connected with the outside may be disposed on the machine body, so as to supply power to the power consuming components of the machine by the external power supply.

Referring to FIG. 3, a cleaning base 12 according to an embodiment of the present disclosure is shown and described. The cleaning base 12 includes a housing 16, the housing 16 having a front side wall 161, a rear side wall 162, left and

right side walls

163, 164, a top wall 165, and a bottom wall 166, i.e., the housing 16 is generally box-shaped.

Referring to fig. 4, the inner wall of the housing 16 defines an inner space in which the cleaning roller 18, the dirty liquid tank 19, and the drive device 7 are at least partially received. The front of the housing 16 has an opening 110 (shown in fig. 1 and 2) extending from the front side wall 161 to the bottom wall 166. In other embodiments, the opening may be located only at the front of the bottom wall, and the front side wall of the housing is a complete wall extending from the top wall to the bottom wall.

As shown in fig. 3 and 5, the housing 16 is pivotally held at a lower portion of the body 11 by the rotary joint 8. The rotary joint 8 includes an upper rotary portion 81 and a lower rotary portion 82, and the upper rotary portion 81 and the lower rotary portion 82 enable the body 11 to be rotatable between an upright rest position and a rearwardly tilted use position.

A part of the lower suction channel 22, a part of the cleaning liquid outlet line and a part of the power supply circuit extend through the rotary joint 8. Dirty liquid and solid waste can be transported from the cleaning base 12 up into the dirty liquid recovery tank 4 via the lower suction passage 22. The cleaning liquid can be fed from the cleaning liquid supply tank 3 down to the cleaning base 12 via the cleaning liquid outlet line. The power supply circuit is able to deliver power from the battery pack 5 located in the upper part down to the power consuming components of the cleaning base 12.

As shown in fig. 4 and 5, the front side wall 161 and the front portion of the top 165 form a removable cover 167. A cleaning roller 18 is provided at the front of the cleaning base 12 and is accommodated in the roller chamber 17 at the front of the inner space. The cleaning roller 18 is rotatably supported by left and

right side walls

163, 164 of the housing 16, and the cleaning roller 18 is rotatable relative to the housing 22 about a rotational axis X in the direction R. In this embodiment, the roller chamber 17 communicates with the opening 110. As shown in fig. 1-2, the front portion and the lower portion of the scrub roller 18 are located at the opening 110.

In this example, the outside of the scrub roller 18 is covered with cleaning elements, which may have bristles, fabric or other cleaning elements, configured to be wetted by a cleaning liquid, such as water, detergent composition, etc.

As shown in fig. 4, in this example, the driving device 7 is mainly composed of a motor member, and the driving device 7 is installed in the motor chamber 113 at the rear of the internal space. The cleaning roller 18 is operatively coupled to the drive means 7 and driven in rotation by the drive means 7. In other embodiments, the motor chamber may not be separately provided, and the driving device may be built in the cleaning roller.

Referring to fig. 5, 6 and 7, the cleaning base 12 includes the wiper roller device 6. The scraping roller device 6 is installed on the inner wall surface of the upper cover 167 of the shell 16 and is positioned at the upper position of the roller chamber 17, and the scraping roller device 6 is simultaneously positioned at the upper side of the sewage box 19. The squeegee device 6 is configured to contact a portion of the cleaning roller 18. The wiping roller device 6 is capable of removing excess dirt liquid and at least part of the solid waste from the scrub roller 18 which is in a state of being wetted by the dirt liquid and solid waste adhering thereto. Excess soil and solid waste removed from the scrub roller 18 by the squeegee assembly 6 can then ultimately be drawn into the soil recovery tank 4 via the lower suction path 22.

A wiping roller device 6 according to an embodiment of the present disclosure is shown and described with reference to fig. 6 and 7. The wiping roller device 6 comprises a first wiping part 61 and a second wiping part 62, the second wiping part 62 being located downstream of the first wiping part 61 with respect to the direction of rotation R of the cleaning roller 18. The first scraping members 61 and the second scraping members 61 are substantially parallel, with a space 63 between the first scraping members 61 and the second scraping members 62.

The first scraping member 61 includes a plurality of tooth-like projections 611, the plurality of projections 611 are arranged in a direction parallel to the rotational axis X of the cleaning roller 18, and a gap 612 is provided between adjacent two projections 611. The plurality of protrusions 611 are arranged to partially penetrate into the cleaning roller 18. The rotation of the cleaning roller 18 enables the plurality of protrusions 611 of the first scraping member 61 to remove solid waste such as hair, flocks, etc. adhered to the outer circumferential surface of the cleaning roller 18, and at the same time, to scrape off a part of the contaminated liquid from the cleaning roller 18. It should be understood that the shape of protrusions 611 is not limited to those shapes shown and/or described in this application, unless specifically so required.

The second scraping member 62 includes a scraping bar 621, the scraping bar 621 being configured to contact a portion of the cleaning roller 18 when the cleaning roller 18 rotates, the scraping bar 18 continuously extending in a direction parallel to the rotational axis X of the cleaning roller 18.

In this example, the second scraping member 62 has a hardness greater than that of the first scraping member 61, for example, the first scraping member 61 is made of plastic, and the second scraping member 62 is made of metal.

By means of the structure of the first scraper members 61 and the second scraper members 62 it is achieved that the first scraper members 61 are better at removing solid waste from the cleaning roller 18 than the second scraper members 62, while the second scraper members 62 are better at removing excess liquid from the cleaning roller 18 than the first scraper members 61; and the frictional force between the second scraping member 62 and the cleaning roller 18 is larger than the frictional force between the first scraping member 61 and the cleaning roller 18.

Referring to fig. 8, it can be understood that when excessive solid waste is deposited on the cleaning roller 18 wetted with the dirty liquid, if a scraping member similar to the second scraping member 62 is directly used, the existence of the solid waste may cause the surface of the cleaning roller 18 to slip, and the efficiency of scraping the dirty liquid is reduced; according to the scheme, solid waste and a small part of dirty liquid adhered to the cleaning roller 18 are scraped by the first scraping part 61 in advance, so that when the cleaning roller 18 rotates to the subsequent second scraping part 62, the second scraping part 62 can scrape the residual dirty liquid from the cleaning roller 18 more easily. Moreover, the first scraping member 61 of the present invention is a multi-tooth-shaped protrusion structure, which is a member similar to a "comb" or "rake" structure, and can break up and fluffy the cleaning elements (such as bristles) on the surface of the cleaning roller 18 when scraping solid waste, which is more beneficial for the later scraping operation of the second scraping member 62. While the dirty liquid scraped by the second scraping member 62 (which may contain small particles of solid waste) can flow to the outside of the scraping roller device 6 through the spacer 63, the gap 612 on the first scraping member 61; in this example, the dirty liquid and the solid waste discharged from the scraping roller device 6 flow toward the dirty liquid box 19 on the lower side.

Referring to FIG. 4, a dirty liquid cartridge 19 is shown and described according to an embodiment of the present disclosure. A dirty liquid box 19 is accommodated in the accommodation chamber 112 in the middle of the inner space between the roller chamber 17 and the motor chamber, the dirty liquid box 19 being arranged to receive dirty liquid and solid waste transferred from the cleaning roller 18 and the wiping roller device 6 and the suction device 2.

The dirty liquid box 19 of the embodiment shown in fig. 9 and 10 has a square structure with an open top, and includes a bottom wall 191 and a peripheral side wall formed by a front side wall 192, a rear side wall 193, a left side wall 194 and a right side wall 195, wherein the bottom wall 191 and the peripheral side wall enclose a transfer chamber 190 capable of temporarily storing dirty liquid and dirt. In this example, the volume of the transfer chamber 190 is much smaller than the volume of the waste liquid storage box 4; in a preferred embodiment, the volume of the contaminated liquid storage tank 4 is 3 times or more the volume of the relay chamber 190.

A suction opening 196 is provided at the intersection of the lower portion of the rear side wall 195 and the rear portion of the bottom wall 191, the suction opening 196 being in fluid communication with the dirty liquid recovery tank 4 via a lower suction passage 22 extending through the rotary joint 8 (see fig. 12). Under the suction action of the suction device 2, the dirty liquid or the solid-liquid mixture entering the transfer chamber 190 can be sent to the dirty liquid recovery tank 4. In this example, in order to facilitate the dirty liquid in the transfer chamber 190 to flow to the suction port 196, the inner wall surface of the bottom wall 191 is provided with a sloped surface 1911 inclined rearward, and the sloped surface 1911 is the lowest position near the suction port 196.

Referring to fig. 4 and 10, the positional relationship of the dirty liquid tank 19 and the cleaning roller 18 according to the disclosed embodiment of the present invention is shown and described. Wherein the front side wall 192 of the waste liquid box 19 abuts against the cleaning roller 18. The transfer chamber 190 has an input port 197 for the solid-liquid mixture to enter the transfer chamber 190, and the input port 197 is disposed on the front side wall 192 and disposed adjacent to the cleaning roller 18.

The transfer chamber 190 in this example is partially below the axis of rotation X of the scrub roller 18 and the mouth of the input port 197 is also partially below the axis of rotation X. The front side wall 192 has a guide ramp 1921 adjacent the scrub roller 18, an upper end 19211 of the guide ramp 1921 extending to an input opening 197 and a lower end 19212 adjacent the lower end 181 of the scrub roller 18.

In this example, the lower end of the guiding inclined plane 192 is a flexible portion made of a flexible material, and the lower end 1922 of the guiding inclined plane 192 at least partially abuts against the surface to be cleaned during the movement of the cleaning base 12 on the surface to be cleaned. This makes it possible to form a stable feed opening 1101 between the mouth defined by the lower end 19212 of the "guide slope 192, the lower end 181 of the cleaning roller 18, the lower end of the left side wall 163 and the lower end of the right side wall 164 and the surface to be cleaned. This feed opening 1101 is advantageous on the one hand for pushing the dirty liquid and solid waste on the surface to be cleaned to the feed opening 1101 by the lower end 19212 of the guide ramp 192, and on the other hand for always forming a "dynamic seal" between the feed opening 1101 and the surface to be cleaned, which both advantages ultimately lead to an increase in the dirt pick-up capacity of the surface cleaning apparatus.

As further shown in fig. 4 and 8, the wiping roller device 6 is positioned above the input port 197, and the second wiping member 62 is positioned above the first wiping member 61, with the lower portion of the first wiping member 61 being adjacent to the input port 197 of the waste liquid box 19. In this example, the dirty liquid or solid garbage scraped by the first scraping member 61 and the second scraping member 62 enters the transfer chamber 190 through the input port 197.

Referring to fig. 11, a schematic diagram of a cleaning liquid supply unit according to an embodiment of the present disclosure is shown and described. As can be seen from this figure, the cleaning liquid supply unit comprises, in addition to the cleaning liquid supply tank 3, a first liquid pump 44, a second liquid pump 45, a control unit 46 for controlling the operation of the first liquid pump 44 and the second liquid pump 45, a first cleaning liquid distributor 42 formed by a plurality of first liquid outlet holes 421, and a second cleaning liquid distributor 43 formed by a pair of outlet holes 198 (see fig. 9) disposed opposite to each other and located below the waste liquid box 19. The flow path control device 41 that supplies the cleaning liquid in the cleaning liquid supply tank 3 to the first cleaning liquid distributor 42 and the second cleaning liquid distributor 43 can be constituted by the first liquid pump 44, the second liquid pump 45, and the control unit 46. The flow path control device 41 may supply the cleaning liquid in the cleaning liquid supply tank 3 to only the first cleaning liquid distributor 42, to the second cleaning liquid distributor 43, or to both the first cleaning liquid distributor 42 and the second cleaning liquid distributor 43.

In this case, the first cleaning liquid dispenser 42 serves to apply clean cleaning liquid to the cleaning roller 18, and thus to the floor surface to be cleaned, by means of the rotating cleaning roller 18. The second cleaning liquid distributor 43 can wash the inner wall surface of the dirty liquid box 19 with clean cleaning liquid, and this washing function can effectively remove solid dirt adhering to the inner wall surface of the dirty liquid box 19.

As shown in fig. 9, a pair of outlet holes 198 in this example are located at the lower portions of the left side wall 194 and the right side wall 195 of the waste tank 19. The outlet opening 198 is configured to direct a spray of cleaning liquid downwardly from horizontal at an angle of 10 deg. -80 deg. so as to be able to spray the cleaning liquid into the inner lower region of the dirt box. The first liquid pump 44 is arranged in the casing 15 of the machine body 11, while the second liquid pump 45 is arranged in the casing 16 of the cleaning foot 12, the control unit 46 being integrated on a control board (not shown) of the machine. In other embodiments, the first cleaning liquid dispenser may alternatively deliver the cleaning liquid directly to the surface to be cleaned.

In this example, the flow path control device 41 of the cleaning liquid supply unit can supply different flow rates of the cleaning liquid to the first cleaning liquid distributor 42 and the second cleaning liquid distributor 43 as required, in addition to supplying the cleaning liquid to the first cleaning liquid distributor 42 and the second cleaning liquid distributor 43 as required. In this example, in order to achieve as little residual soiling solution as possible and as large a flow rate as possible for flushing the inner wall surface of the soiling solution box 19 during floor cleaning, the flow path control device 41 is configured to provide a greater flow rate of liquid when supplying the cleaning liquid in the cleaning liquid supply tank 3 to the second cleaning liquid distributor 43 than when supplying the cleaning liquid in the cleaning liquid supply tank 3 to the first cleaning liquid distributor 42. In order to meet the requirements of different flow rates, the control unit 46 controls the second liquid pump 45 to operate at a larger flow rate than the first liquid pump 44 in this example.

In other embodiments, a single fluid pump may be used in combination with a three-way valve instead of the two fluid pumps, wherein the three-way valve allows two flow paths to be switched freely, and the flow rate of the single fluid pump is controlled to allow two fluid pumps to operate at different flow rates.

Referring to fig. 12, a schematic diagram of a dirty liquid recovery unit according to an embodiment of the disclosure is shown and described. In terms of the direction of rotation R of the cleaning roller 18, the first cleaning liquid distributor 42 is located downstream of the scraping roller device 6, and the scraping roller device 3 is located downstream of the input opening 197 and upstream of the first cleaning liquid distributor 42.

As the cleaning roller 18 rotates in the direction R, the first cleaning liquid dispenser 42 continuously applies the cleaning liquid to the cleaning roller 18, and the cleaning roller 18 loaded with the cleaning liquid performs wet scrubbing of the surface 60 to be cleaned during contact with the surface 60 to be cleaned. During the scrubbing of the cleaning roller 18 against the surface 60 to be cleaned, the used cleaning liquid is contaminated into dirty liquid, a part of which is absorbed by the cleaning elements on the outer surface of the cleaning roller 60, and a part of which is carried upward away from the surface 60 to be cleaned by the centrifugal force generated when the cleaning roller 18 rotates and the suction force of the suction device 2 acting on the feed opening 1101.

At the same time, some solid wastes which are not dissolved in the cleaning liquid will adhere to the cleaning roller 18, and some solid wastes will be carried upward away from the surface to be cleaned 60 by the centrifugal force generated when the cleaning roller 18 rotates and the suction force applied to the feeding port 1101 by the suction device 2. Dirty liquid and solid waste not loaded onto the scrub roller 18 will then be fed directly from the input port 197 into the transfer chamber 190 in the dirty liquid box 19. While the dirty liquid absorbed by the cleaning roller 60 and the solid garbage adhered to the cleaning roller 60 will continue to move downstream after passing through the input port 197, when moving to the scraping roller device 6, the first scraping member 61 and the second scraping member 62 will sequentially rub against the cleaning roller 18, so that the excessive dirty liquid absorbed by the cleaning roller 60 and the solid garbage adhered to the cleaning roller 60 are removed from the cleaning roller 18, and under the influence of gravity and the suction force of the suction device 2, the part of the scraped dirty liquid and solid garbage will flow back down to the input port 197 and enter the transfer chamber 190 in the dirty liquid box 19. In other embodiments, the excess soil removed from the scrub roller may simply run by gravity into a transfer chamber in a soil box located below it.

At least a portion of the dirty liquid and solid waste entering the transfer chamber 190 will flow to the suction opening 196 and be transferred by the suction device 2 through the lower suction passage 22 to the dirty liquid recovery tank 4 in real time. The dirty liquid and solid waste will be retained in the dirty liquid recovery tank 4 and clean air will flow from the upper suction channel 21 to the suction device 2 and eventually escape to the outside.

Therefore, the dirty liquid recovery unit completes the recovery work of dirty liquid and solid garbage in one stage. In the next stage, the "clean" cleaning roller 18, which has been freed of excess dirt and solid waste by the squeegee assembly 6, will continue to rotate about the X-axis and the first cleaning liquid dispenser 42 will continue to deliver clean cleaning liquid to the cleaning roller 18 until all of the surfaces 60 to be cleaned have been cleaned.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A surface cleaning apparatus, comprising:

a suction device;

a cleaning base adapted to be moved over a surface to be cleaned, said cleaning base comprising a housing, at least one cleaning roller capable of being wetted by a cleaning liquid, and a dirt box disposed within said housing and arranged to receive dirt liquid and dirt;

cleaning liquid supply unit, including the cleaning liquid supply tank that is used for the storage cleaning liquid, with first cleaning liquid distributor and second cleaning liquid distributor of cleaning liquid supply tank fluid intercommunication, first cleaning liquid distributor be arranged to be applicable to with the cleaning liquid apply to treat clean surface and/or the cleaning roller, second cleaning liquid distributor be arranged to be applicable to utilize the cleaning liquid is right at least some internal face of dirty liquid box washes.

2. A surface cleaning apparatus as claimed in claim 1, wherein the dirty liquid tank is located adjacent the rear side of the at least one cleaning roller, the dirty liquid tank being configured to receive dirty liquid and dirt picked up from the surface to be cleaned.

3. A surface cleaning apparatus as claimed in claim 1, wherein the second cleaning liquid dispenser includes at least one outlet aperture.

4. A surface cleaning apparatus as claimed in claim 3, characterised in that the outlet aperture is orientated to spray cleaning liquid at least onto the internal base of the dirt box.

5. A surface cleaning apparatus as claimed in claim 3, wherein the second cleaning liquid dispenser includes a pair of said outlet apertures, said pair of outlet apertures being oppositely disposed.

6. A surface cleaning apparatus as claimed in claim 5, characterised in that each of the outlet apertures is configured to direct a spray of cleaning liquid downwardly from a horizontal direction at an angle of between 10 ° and 80 °.

7. A surface cleaning apparatus as claimed in claim 5, wherein the dirty liquid tank comprises a pair of oppositely disposed left and right side walls, the pair of outlet apertures being disposed in a lower portion of the left and right side walls respectively.

8. A surface cleaning apparatus as claimed in claim 7, wherein the dirty liquid tank comprises a rear side wall and a bottom wall, the dirty liquid tank comprising a suction opening provided at the intersection of the rear side wall and the bottom wall and in fluid communication with the exterior.

9. Surface cleaning apparatus according to claim 8 in which the inner wall surface of the bottom wall is at least in part a ramped surface sloping towards the suction opening.

10. A surface cleaning apparatus as defined in claim 1, further comprising a flow path control device for supplying the cleaning liquid in the cleaning liquid supply tank to the first cleaning liquid distributor and for supplying the cleaning liquid in the cleaning liquid supply tank to the second cleaning liquid distributor.

11. A surface cleaning apparatus as claimed in claim 10, wherein the flow control means is configured to provide a greater flow of cleaning liquid when the cleaning liquid in the cleaning liquid supply tank is supplied to the second cleaning liquid dispenser than when the cleaning liquid in the cleaning liquid supply tank is supplied to the first cleaning liquid dispenser.

12. A surface cleaning apparatus as claimed in claim 10, wherein the flow control means comprises a first liquid pump disposed between the cleaning liquid supply tank and a first cleaning liquid distributor, a second liquid pump disposed between the cleaning liquid supply tank and a second cleaning liquid distributor, and a control unit for controlling the operation of the first liquid pump and the second liquid pump.

13. A surface cleaning apparatus as claimed in claim 12, further comprising a body, the cleaning base being connected to the body, the first fluid pump being mounted in the body, and the second fluid pump being mounted in the cleaning base.

14. A surface cleaning apparatus as claimed in claim 1, further comprising a dirty liquid receptacle having a volume greater than the volume of the dirty liquid cartridge; the surface cleaning apparatus is arranged to transfer at least part of the soiled liquid and soil located behind the soiled liquid container to the soiled liquid holding tank by means of the suction device.

15. A surface cleaning apparatus as claimed in claim 1, characterised in that the dirt tray is removably mounted to the housing.