Surface cleaning device

Abstract

A surface cleaning apparatus includes a fluid delivery system and a recovery system and is operable in a plurality of user-selectable cleaning modes including at least a wet vacuum mode and a dry vacuum mode. The fluid delivery system has a fluid distributor that can include a spray manifold for wetting a brushroll. The recovery system includes a tank that can have a baffle to separate liquid and / or debris from a working airflow. Operating parameters of the apparatus can be automatically adjusted based on a detected floor type. The apparatus can be docked with a tray for recharging and / or self-cleaning.

Description

TECHNICAL FIELD

[0001] The present invention relates to a surface cleaning apparatus. BACKGROUND

[0002] Surface cleaning apparatuses include wet / dry vacuum cleaners or multi-surface cleaners that can be used to clean hard floor surfaces (e.g., tile and hardwood) and soft floor surfaces (e.g., area rugs and carpets). Some multi-surface cleaners include a fluid delivery system that delivers cleaning fluid (typically liquid) to a surface to be cleaned and a recovery system that extracts liquid and debris from the surface. The delivery system typically includes one or more supply tanks for storing a supply of cleaning liquid, a distributor for applying the liquid to the surface to be cleaned, and a supply conduit for delivering the liquid from the supply tank to the distributor. An agitator can be provided to agitate the liquid on the surface. The recovery system typically includes a recovery tank, a suction nozzle adjacent to the surface to be cleaned and in fluid communication with the recovery tank, and a suction source for drawing liquid from the surface to be cleaned and through the suction nozzle to the recovery tank.

[0003] Some multi-surface cleaners perform wet cleaning well, but at the expense of or completely exclude dry vacuum cleaning. Providing a single cleaning apparatus that can effectively perform wet cleaning of both hard and soft floors as well as dry vacuum cleaning presents unique challenges related to fluid distribution, surface agitation, and separation of collected liquid and debris.

[0004] Collection of liquid and debris requires periodic maintenance of the multi-surface cleaner. Currently, the clean-up experience is often dirty and time consuming. As a result, users are reluctant to properly clean the multi-surface cleaner after operation, which can be unhygienic and results in poor cleaning performance on subsequent uses of the multi-surface cleaner. Complying with proper maintenance requirements has proven challenging for current multi-surface wet / dry vacuum cleaner designs. SUMMARY

[0005] An improved surface cleaning apparatus is provided herein. In certain aspects, the surface cleaning apparatus is a multi-surface wet / dry vacuum cleaner that can be used to clean hard floor surfaces (e.g., tile and hardwood) and soft floor surfaces (e.g., area rugs and carpets).

[0006] According to one aspect of the disclosure, the surface cleaning apparatus is provided with an improved recovery system for removing fluid and debris from a surface to be cleaned and storing the fluid and debris on the apparatus. The recovery system includes a recovery device having a path inlet and a path outlet, a suction source including a vacuum motor in fluid communication with the path inlet, and a recovery tank having a standpipe and a baffle that directs fluid and / or debris from the working airflow to the sides and / or bottom of the recovery tank.

[0007] According to another aspect of the present disclosure, a surface cleaning apparatus is provided with an improved delivery system for delivering cleaning fluid to a surface to be cleaned. The delivery system includes a supply tank configured to hold cleaning fluid, a fluid distributor, and a fluid supply path from the supply tank to the fluid distributor, wherein the fluid distributor includes a spray manifold having an inlet and a supply chamber that supplies cleaning fluid to a plurality of outlets, wherein a cross-section of the supply chamber decreases in a direction away from the inlet.

[0008] According to yet another aspect of the present disclosure, a surface cleaning apparatus is operable in a dry vacuum cleaning mode and a smart wet cleaning mode, wherein at least one operating parameter is set based on a floor type. Optionally, the apparatus has a turbine or power cleaning mode for both dry and wet cleaning, wherein at least one operating parameter, such as a suction power level, a fluid distribution flow rate, and / or a brushroll speed, is increased.

[0009] According to still another aspect of the present disclosure, a surface cleaning apparatus is provided with a floor type sensing mechanism. By detecting whether a floor surface beneath the apparatus is a hard floor or a soft floor, one or more operating parameters of the apparatus can be adjusted. In certain embodiments, a fluid distribution flow rate, a brushroll speed, a suction power level, or any combination thereof can be set based on the detected floor surface.

[0010] According to another aspect of the present disclosure, a method for operating a surface cleaning apparatus includes sensing a floor type of a surface to be cleaned by generating sensor data with sensors onboard the surface cleaning apparatus during an operating cycle of the surface cleaning apparatus; processing the sensor data to determine whether the floor type is a hard floor or a soft floor; and selecting a cleaning mode based on the sensed floor type. Optionally, a cleaning fluid flow rate, a brushroll speed, a suction power, or any combination thereof is adjusted based on the sensed floor type.

[0011] In these and other aspects, the surface cleaning apparatus includes an upright handle assembly or a main body and a cleaning head or base coupled to the main body and adapted to move over a surface to be cleaned.

[0012] In these and other aspects, the surface cleaning apparatus has a movable joint assembly connecting the base to the upright main body to move the main body about at least one axis. The joint assembly can be disposed behind a suction conduit of the apparatus.

[0013] In these and other embodiments, the surface cleaning apparatus has a rechargeable battery for wireless operation. The battery can be disposed above the supply tank, above the recovery tank, disposed behind the recovery tank, behind a handle axis of the handle, on a rear side of the frame, or any combination thereof.

[0014] In these and other aspects, a docking station or tray can be provided for docking a surface cleaning device, for recharging a battery of the device, and / or for self-cleaning the device while it is docked.

[0015] In these and other aspects, the surface cleaning device is provided with a self-cleaning mode in which an automatic, unattended cleaning cycle is performed.

[0016] These and other features and advantages of the present disclosure will become apparent from the following description of particular embodiments, from the claims, and from the accompanying drawings.

[0017] Before the aspects of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of the components set forth in the following description or illustrated in the drawings. The application is capable of other embodiments and of being practiced or being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. The use of "including," "comprising," "having" and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items and equivalents thereof. Further, enumeration can be used herein to describe various embodiments. Unless otherwise expressly stated, the use of enumeration should not be construed as limiting the application to any specific order or number of components. Nor should the use of enumeration be construed as excluding from the scope of the application any additional steps or components which can be combinable therewith or in combination therewith. Any reference to "at least one of X, Y and Z" is meant to include any one of X, Y or Z individually, as well as any combination of X, Y and Z, for example, X, Y, Z; X, Y; X, Z; and Y, Z. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a perspective view of a surface cleaning device according to one embodiment of the present disclosure, shown in an upright or storage position and docked on a tray;

[0019] Figure 2 is a schematic view of a plurality of functional systems of the device;

[0020] Figure 3 is a cross-sectional view of the device taken along line III-III in Figure 1 is a cross-sectional view of the device taken along line III-III in

[0021] Figure 4 is a top view of a base of the device, showing an architectural layout including locations and relative positions for components, with portions of the base removed for clarity;

[0022] Figure 5 is a rear perspective view showing the supply tank and the recovery tank exploded from the upright body of the apparatus;

[0023] Figure 6 is a rear perspective view showing the joint assembly of the apparatus, with the rear housing cover of the apparatus removed for clarity to show the fluid supply path through the joint;

[0024] Figure 7 is an exploded view of the fluid distributor of the apparatus;

[0025] Figure 8 is a close-up view showing the outlet of the fluid distributor;

[0026] Figure 9 is a cross-sectional view of the fluid distributor taken along line IX-IX of Figure 7 , with the dashed line indicating that the full length of the fluid distributor is not shown;

[0027] Figure 10 is a close-up cross-sectional view of the fluid distributor adjacent the brush roll taken along line X-X of Figure 1 ;

[0028] Figure 11 is a close-up cross-sectional view of the base taken along line III-III of Figure 1 ;

[0029] Figure 12 is a partial exploded perspective view of the base;

[0030] Figure 13 is a partial exploded perspective view of the recovery tank of the apparatus;

[0031] Figure 14 is a cross-sectional view taken along the midline III-III of Figure 1 , enlarged to show aspects of the recovery tank;

[0032] Figure 15A is a cross-sectional view taken along line XV-XV of Figure 1 , enlarged to show aspects of the recovery tank;

[0033] Figure 15B is a view similar to Figure 15A , showing the working air flow path through the recovery tank, which is generally indicated by the dashed line, with the working air comprising an airstream containing debris and liquid;

[0034] Figure 16 is a block diagram of a portion of the electrical components of the apparatus;

[0035] Figure 17 is a perspective view showing one user interface configuration for the apparatus;

[0036] Figure 18 An exemplary process of operating a surface cleaning apparatus according to one or more floor type sensing techniques is shown;

[0037] Figure 19 An exemplary process of operating a surface cleaning apparatus according to torque sensing is shown;

[0038] Figure 20 An exemplary process of operating a surface cleaning apparatus according to one or more mode selection and floor type sensing techniques is shown;

[0039] Figure 21 is a cross-sectional view taken along line III-III of Figure 1 , enlarged to show aspects of the tray;

[0040] Figure 22 is a partial perspective view of another recycling tank, with the lid of the tank in a closed or sealed position;

[0041] Figure 23 is a view similar to Figure 22 , showing the lid in an open or filtering position;

[0042] Figure 24 is an exploded view of the lid of the recycling tank of Figure 22 ; and

[0043] Figure 25 is a view of the lid showing filtering of the contents of the recycling tank during emptying. DETAILED DESCRIPTION

[0044] The present invention relates generally to a surface cleaning apparatus, which can be in the form of a wet / dry vacuum cleaner or a wet / dry multi-surface cleaner, which can be used to clean hard floor surfaces (e.g., tile and hardwood) and soft floor surfaces (e.g., area rugs and carpets). Aspects of the present disclosure relate to an improved wet / dry multi-surface cleaner having a plurality of user-selectable cleaning modes, including at least a wet vacuum cleaning mode and a dry vacuum cleaning mode. Aspects of the present disclosure relate to a wet / dry multi-surface cleaner having improved fluid distribution. Aspects of the present disclosure relate to a wet / dry multi-surface cleaner having improved dry vacuum cleaning features. Aspects of the present disclosure relate to a wet / dry multi-surface cleaner having automatic floor type sensing. Aspects of the present disclosure relate to a wet / dry multi-surface cleaner having an improved architecture.

[0045] As described below, at least some embodiments of the surface cleaning apparatus provided herein function through their various elements to provide effective separation of liquid and solid debris. By gently directing liquid and debris into the recovery tank and reducing air flow velocity, separation of liquid, debris, and air is facilitated. As described below, at least some embodiments of the surface cleaning apparatus provided herein function through their various elements to make the cleaning process easier by providing an easy-to-clean tank with fewer and / or more accessible parts. As described below, at least some embodiments of the surface cleaning apparatus provided herein function through their various elements to provide improved fluid delivery to the brushroll. As such, certain features of the surface cleaning apparatus can be considered functional, but can also be implemented in different aesthetic configurations.

[0046] As used herein, the term "debris" includes dirt, soil, dust, hair, stains, and other debris, unless otherwise indicated.

[0047] The functional systems of the surface cleaning apparatus can be arranged in any desired configuration, such as a stand-up device having a base and an upstanding body for directing the base across a surface to be cleaned, a portable device adapted to be hand-held by a user, a canister device having a cleaning tool connected to a wheeled base by a vacuum hose, an autonomous or robotic device having an autonomous drive system and an autonomously movable housing, or a commercial device. Any of the above cleaners can be adapted to include a flexible vacuum hose that can form a portion of a conduit between a suction nozzle and a suction source. As used herein, the term "wet / dry vacuum cleaner" or "wet / dry multi-surface cleaner" includes a vacuum cleaner that can be used to clean hard floor surfaces (e.g., tile and hardwood) and soft floor surfaces (e.g., carpet).

[0048] Figures 1-2 A surface cleaning apparatus 10 according to one aspect of the present disclosure is shown. As discussed in further detail below, the apparatus 10 has various features and improvements, which are described in further detail below.

[0049] The apparatus 10 can include a plurality of cleaning systems, including a fluid delivery system and a recovery system. With both fluid delivery and recovery systems, the apparatus 10 can deliver cleaning fluid to a surface to be cleaned and can recover fluid and debris from the surface to be cleaned.

[0050] As shown herein, the apparatus 10 can be a stand-up multi-surface wet / dry vacuum cleaner having a housing including a stand-up handle assembly or body 12 and a cleaning foot or base 14 mounted to or coupled to the stand-up body 12 and adapted to move over a surface to be cleaned. Various cleaning systems and components thereof can be supported by either or both of the base 14 and the stand-up body 12.

[0051] For the description related to the drawings, the terms "upper," "lower," "right," "left," "rear," "front," "vertical," "horizontal," "inner," "outer," and derivatives thereof shall relate to the present disclosure as oriented in the figures from the perspective of a user behind the device 10, which defines the rear of the device 10. However, it is to be understood that the present disclosure can take various alternative orientations, unless expressly specified to the contrary. Figure 1

[0052] The upright body 12 can include a handle 16 and a frame 18. The frame 18 can include a main support section that at least partially supports a supply tank 20 and a recovery tank 22, and can also support additional components of the body 12, including but not limited to a battery 66. The device 10 can include a fluid delivery or supply path including and at least partially defined by the supply tank 20 for storing and delivering a cleaning fluid (e.g., a cleaning liquid) to a surface to be cleaned, and a recovery path including and at least partially defined by the recovery tank 22 for removing liquid and debris from the surface to be cleaned and storing the liquid and debris until emptied by a user.

[0053] The handle 16 can include a handle tube 26 having a grip 28 at its upper end. The handle tube 26 can extend upwardly from the frame 18 and can be elongated to define a longitudinal handle axis 24. Various configurations for the grip 28 are possible, including a looped grip as shown, or a non-looped, bar-like grip.

[0054] The device 10 can include at least one user interface ("UI") through which a user can interact with the device 10 to effect one or more functions. Among other capabilities, the UI can accept user input for controlling the cleaning system and / or serve as a communication output device for the cleaning system. To accept user input, the UI can have at least one user input control operably connected to one or more components or systems of the device 10 to affect and control operation thereof. Non-limiting examples of input controls include buttons, triggers, toggle keys, keys, switches, etc., or any combination thereof. To convey output to the user, the UI can have at least one status indicator or have a status display including a plurality of status indicators that convey to the user the condition or status of the device 10, including its systems and components. Non-limiting examples of status indicators include visual indicators such as lights (e.g., LEDs), icon displays, text displays, graphic displays, etc., or any combination thereof. The UI can also include an audible output component such as a speaker.

[0055] ​In some embodiments, the device 10 can include a first UI 30 and a second UI 32. The first UI 30 can be an input UI configured to accept user input to control the device 10, including its systems or components, and the second UI 32 can be an output UI configured to indicate status information related to the device 10, including its systems or components.

[0056] While the first UI 30 is referred to herein as an input UI, in some embodiments, the first UI 30 can also have output functionality. For example, in some embodiments, the first UI 30 can include at least one status indicator that communicates to the user the condition or status of the device 10, including its systems and components. In other embodiments, the first UI 30 accepts input alone, without providing output to the user.

[0057] While the second UI 32 is referred to herein as an output UI, in some embodiments, the second UI 32 can also have input functionality. For example, in some embodiments, the second UI 32 can include at least one user input control that is operably connected to one or more components or systems of the floor cleaner 10 to affect and control their operation. In other embodiments, the second UI 32 provides output alone, without accepting input from the user.

[0058] The first UI 30 and the second UI 32 are separate from each other and located on different areas of the floor cleaner 10. The upright body 12, or more specifically, the handle 16, or more specifically, the grip 28, can include the first UI 30. The first UI 30 can be conveniently located near or on the grip 28 so that a user can hold the grip 28 with one hand and operate the first UI 30 with the same hand. For example, the user can wrap their palm and fingers around the grip 28 and use the thumb of the same hand to operate the first UI 30. Other locations for the first UI 30 are possible. In other embodiments, the first UI 30 can be distributed across multiple portions of the floor cleaner 10, such as including a first portion located on the grip 28 and another portion located on the handle 16 or the frame 18.

[0059] The upright body 12, or more specifically, the frame 18, can include the second UI 32. The second UI 32 can be conveniently located on the front side of the frame 18, below the handle 16 and above the base 14, and optionally above the recovery tank 22. Other locations for the second UI 32 are also possible, including on the base 14.

[0060] Figure 2is a schematic illustration of a plurality of functional systems of the device 10. The delivery system includes a supply tank 20 configured to hold a cleaning fluid, at least one fluid distributor 38 to supply the cleaning fluid from the supply tank 20, and a fluid supply path 40 from the supply tank 20 to the fluid distributor 38.

[0061] The supply tank 20 can store the cleaning fluid in liquid form. The cleaning fluid can include one or more of any suitable cleaning fluid, including but not limited to water, a composition, a concentrated detergent, a diluted detergent, other surface cleaning and / or treatment agents, and mixtures thereof. For example, the cleaning fluid can include water. In another embodiment, the cleaning fluid can include a mixture of water and a concentrated detergent.

[0062] It should be noted that while the device 10 described herein is configured to deliver a cleaning liquid, aspects of the present disclosure can be applicable to surface cleaning devices that deliver steam. Thus, unless otherwise indicated, the term "cleaning fluid" can encompass a liquid, steam, or both.

[0063] The delivery system can include a flow controller for controlling the flow of fluid from the supply tank 20 to the fluid distributor 38. In one configuration, the flow controller can include a pump 44 that pressurizes the supply path 40 and controls the delivery of cleaning fluid to the fluid distributor 38. In one embodiment, the pump 44 can be a centrifugal pump. In another embodiment, the pump 44 can be a solenoid pump with a single speed, dual speed, or variable speed.

[0064] The release of cleaning fluid from the distributor 38 can be manually controlled by a user or automatically controlled by selecting a cleaning mode. As described in further detail below, in some implementations, the operation of the pump 44 can be mode dependent such that the pump 44 can or can not be activated depending on the selected cleaning mode of the device 10.

[0065] In another configuration of the supply path, the pump 44 can be eliminated and the flow control system can include a gravity feed system having a valve fluidly coupled with an outlet of the supply tank 20, whereby when the valve is open, cleaning fluid will flow to the distributor 38 under the force of gravity.

[0066] The distributor 38 can include various structures, such as a suction nozzle, a suction tip, or a manifold, and can include at least one fluid outlet for dispensing cleaning fluid to a surface to be cleaned. The distributor 38 can be positioned to deliver cleaning fluid directly to a surface to be cleaned or indirectly by delivering cleaning fluid to an agitator, such as but not limited to at least one brush roll 46. In one non-limiting embodiment, the distributor 38 delivers cleaning fluid to a horizontally rotatable brush roll 46.

[0067] The delivery system can include other conduits, pipes, tubing, hoses, connectors, valves, etc. that fluidly couple components of the delivery system together and provide the supply path 40.

[0068] Optionally, a heater 48 can be provided for heating the cleaning fluid prior to delivery to the surface to be cleaned. In one embodiment, a series heater 48 can be located downstream of the supply tank 20 and upstream or downstream of the pump 44. Other types of heaters can also be used. In yet another embodiment, the cleaning fluid can be heated using exhaust air from a motor cooling air path of a suction source used for the recovery system. In yet another embodiment, the cleaning fluid is unheated.

[0069] In Figure 2 In the illustrated embodiment, the delivery system includes a single supply tank 20 for storing a supply of cleaning fluid. In another embodiment, the delivery system can have an additional supply container (not shown) for storing another cleaning fluid. For example, the supply tank 20 can store water, and the second supply container can store a cleaning agent, such as a detergent. In embodiments that provide multiple supply containers, the apparatus 10 can have a mixing system for controlling the composition of the cleaning fluid delivered to the surface.

[0070] The recovery system can include a recovery path 50 having a path inlet 52 and a path outlet 53 that passes through the apparatus 10, a suction source 54 including a vacuum motor 56 in fluid communication with the path inlet and configured to generate a working stream that passes through the recovery path 50, and a recovery tank 22 for separating and collecting liquid and debris from the working stream for subsequent disposal. A separator 58 can be formed in a portion of the recovery tank 22 for separating liquid and entrained debris from the working stream. In some embodiments, the separator 58 can include a baffle, aspects of which are described in further detail below. Other separators are also possible.

[0071] In one embodiment, the path inlet 52 is disposed on the base 14 and can be defined by a suction inlet port 60 and / or a brush chamber 62 disposed on the cleaning head or the base 14. One or both of the suction inlet port 60 and the brush chamber 62 can be at least partially formed by a suction nozzle, a brush cover, or a combination thereof.

[0072] In one embodiment, the path outlet 53 is disposed on the recovery tank 22 and can be defined by an exhaust hole in the recovery tank 22. In another embodiment, the path outlet 53 is disposed at another location on the apparatus 10.

[0073] The device 10 can include at least one agitator to agitate the surface to be cleaned. In one embodiment, the agitator is a rotating brush roll 46. In one non-limiting example, the suction inlet port 60 is positioned proximate the brush roll 46 to collect liquid and debris directly from the brush roll 46. Other embodiments of agitators include, but are not limited to, two horizontally rotating brush rolls, one or more stationary rotating brushes, a stationary brush, or a cleaning pad.

[0074] A drive assembly including a brush roll motor 64 can drive the brush roll 46. A drive transmission (not shown) operably connects the motor 64 with the brush roll 46 for transmitting rotational motion of the motor 64 to the brush roll 46. In other embodiments, the drive transmission can operably connect the brush roll 46 with the vacuum motor 56 to transmit rotational motion of the motor 56 to the brush roll 46.

[0075] The electrical components of the device 10, including the pump 44, the vacuum motor 56, the brush roll motor 64, or any combination thereof, are electrically coupled to a power source, which can include a battery 66, preferably a rechargeable battery, for wireless operation. In one embodiment, the rechargeable battery 66 is a lithium-ion battery. The rechargeable battery can be recharged in place on the device 10, or can be removed from the device 10 for recharging. In another exemplary configuration, the battery 66 can include a user-replaceable battery. In yet another embodiment, the power source can include a power cord adapted to plug into a household electrical outlet for wired operation.

[0076] With a rechargeable battery, a suitable charger can be provided for the device 10. A charging port 68 Figure 3 ) can be provided on the upright body 12 and can be electrically coupled to the battery 66. In the illustrated embodiment, the charging port 68 is provided on the rear side of the frame 18. A tray 70 Figure 1 ) can store the device 10 and recharge the battery 66 when not in use. The tray 70 can be configured to receive the base 14 of the floor cleaner 10 with the upright body 12 in a generally upright storage position. The tray 70 can be further configured for further functionality, such as self-cleaning the device 10.

[0077] The device 10 can include a main controller 72 operably coupled with various systems and components of the device 10. In one implementation, the main controller 72 can include a printed circuit board (“PCB”). As used herein, unless otherwise indicated, the term “PCB” includes a printed circuit board having a plurality of electrical and electronic components that provide operational control to the device 10. The PCB includes, for example, a processing unit (e.g., a microprocessor, microcontroller, or another suitable programmable device) and a memory (e.g., read-only memory (“ROM”), random access memory (“RAM”), electrically erasable programmable read-only memory (“EEPROM”), flash memory, or another suitable magnetic, optical, physical, or electronic memory device). The processing unit is connected to the memory and executes instructions (e.g., software) that can be stored in the RAM (e.g., during execution), the ROM (e.g., on a generally permanent basis), or another non-transitory computer-readable medium such as another memory or a disk. Additionally or alternatively, the memory is included in the processing unit (e.g., as part of a microcontroller). The software stored in the memory includes, for example, firmware, program data, one or more program modules, and other executable instructions. The processing unit is configured to retrieve and execute instructions related to the control processes and methods described herein, among others, from the memory. The PCB can also include a plurality of additional passive and active components, such as resistors, capacitors, inductors, integrated circuits, and amplifiers, among others. These components are arranged and connected to provide a variety of electrical functions to the PCB, including signal conditioning or voltage conditioning. For purposes of the description, the PCB and the electrical components assembled on the PCB are collectively referred to as the controller. Thus, the main PCB and the electrical components assembled on the main PCB can be referred to as the main controller 72.

[0078] Optionally, a base controller 74, or base PCB as referred to herein, can operably couple the main controller 72 with electrical components within the base 14 of the device 10, such as the pump 44 and the brush motor 64. In other implementations, the device 10 does not include a separate base PCB.

[0079] Figure 3An architectural layout of the upright body 12 is shown, including the location and relative position of components of the supply and recovery system, according to one aspect of the present disclosure. The upright body 12 includes components thereon including the supply tank 20, the recovery tank 22, the battery 66, the vacuum motor 56, the main controller 72, and the display UI 32. The components of the upright body 12 are arranged in well-balanced relative positioning, comfortable for the user to operate, and provide protection for the electronic components. For example, the tanks 20, 22 are disposed in the lower end of the frame 18, and the motor 56 and battery 66 are disposed in the upper end of the frame 18 to arrange these components in a generally linear stack orientation, providing a compact spatial arrangement for the upright body 12 that is comfortable to hold in an inclined, in-use position. The recovery tank 22 is disposed on the lower front side of the frame 18, and the supply tank 20 is disposed on the rear side of the frame 18. The vacuum motor 56 is disposed above the recovery tank 22, generally on the front side of the frame 18. The battery 66 is disposed above the supply tank 20, generally on the rear side of the frame 18. With the battery 66 disposed above the tanks 20, 22, the battery 66 is isolated from potential exposure to liquids, for example from leaks from the tanks 20, 22 or other components of the fluid delivery and recovery system. In the illustrated implementation, the battery 66 is disposed within the frame 18 of the upright body 12, on the rear side thereof. The supply tank 20 and one or more conduits of components of the delivery system that couple the tank 20 to the base 14 can be disposed below the battery 66. For similar reasons, other electronic components, for example the main controller 72 and the UI 32 can be disposed above the tanks 20, 22, and the available space above the vacuum motor 56 and in front of the battery 66 can be further used. Other arrangements of the components of the apparatus 10 are possible, while maintaining a well-balanced and comfortable to operate apparatus 10 and isolated electronic components.

[0080] Figure 4 An architectural layout of the base 14 is shown, including the location and relative position of components of the supply and recovery system, according to one aspect of the present disclosure. The base 14 includes components thereon including the pump 44, the brushroll 46, and the brushroll motor 64. For clarity of the architectural layout, one or more housing pieces and component covers of the base 14 are not shown in the Figure 4

[0081] In one implementation, the base 14 includes a plurality of sides, including for example a front side 88F, a first lateral side or right side 88R, a second lateral side or left side 88L, and a rear side 88B. The base 14 can include a base housing 90 that supports the components of the base 14, the base housing 90 including one or more housing pieces and / or covers assembled together, and in some implementations, defining one or more sides of the base 14. Wheels 92 can at least partially support the base housing 90 to move over a surface to be cleaned.

[0082] ​The components of base 14 are arranged with relative positioning that provides a low profile and easy to maneuver architecture along the surface to be cleaned. For example, pump 44 and brushroll motor 64 are disposed behind brushroll 46. As another example, pump 44 and brushroll motor 64 are located on opposite sides of suction inlet port 60, in Figure 4 which only a portion is visible. Conduit 94, which fluidly couples port 60 to recovery tank 22 Figure 3 and forms part of recovery path 50 Figure 2 , can pass between pump 44 and brush motor 64 and can generally bisect the rear of base 14 into a pump cavity in which pump 44 is located and a brush motor cavity in which brush motor 64 is located. Base PCB 74 can be located above pump 44. Other arrangements of the components of base 14 are possible.

[0083] Figure 5 is a rear perspective view of tanks 20, 22 exploded from upright body 12. Tanks 20, 22 can be mounted to frame 18 in any configuration. In the present implementation, tanks 20, 22 are removable from frame 18 for filling / emptying. Supply tank 20 can be removably mounted at the rear of frame 18 such that supply tank 20 passes through the rear side 110 of frame 18 for filling.

[0084] Upright body 12 includes tank sockets or receptacles 112, 114 for receiving supply tank 20 and recovery tank 22, respectively. As shown herein, in one implementation, tank receptacles 112, 114 can be defined by portions of frame 18 and can be disposed on opposite sides of frame 18, and more particularly on the rear and front sides of frame 18, respectively.

[0085] Supply tank 20 can be removably mounted at the rear of frame 18 such that supply tank 20 passes through the rear side 110 of frame 18. Supply tank receptacle 112 has an access opening 116 at rear side 110 and supply tank 20 is loaded and unloaded through access opening 116. A wall 118 of supply tank 20 is visible and forms the rear exterior surface of device 10 when tank 20 is located in receptacle 112. With this configuration, a user can easily load and unload supply tank 20 from a typical operating position behind device 10.

[0086] The recycling tank receiver 114 can be generally disposed forward of the supply tank receiver 112 and can include a recycling tank support 120 on which the tank 22 rests and a top plate 122 generally opposite the support 120. The recycling tank receiver 114 can have an open front side and lateral sides so that the front wall 124 and lateral walls 126 of the recycling tank 22 are visible and form the outer surface of the appliance 10 when the tank 22 is located in the receiver 114. With this configuration, a user can easily view the contents of the tank 22 from various viewing angles and can easily view the contents of the tank 22 with the upright body 12 in various tilted in use positions.

[0087] The appliance 10 can have a movable joint assembly 96 connecting the base 14 to the upright body 12 for movement of the body 12 about at least one axis. In one embodiment, the joint assembly 96 can include a multi-axis joint coupling the base 14 to the upright body 12 for movement about at least two rotational axes X, Y. The upright body 12 can be pivotal relative to the base 14 about a first axis X between an upright storage position (FIG. 1) and a tilted in use position (e.g., FIG. 2). Figure 5 ) and a tilted in use position (e.g. Figure 3 ) relative to the base 14 about a second axis Y to steer the base 14 as it is moved over a surface. A user can use the handle 16 to pivot the body 12 about the axes X, Y. In the tilted in use position, the upright body 12 forms an acute angle with the surface to be cleaned and the user can partially support the appliance 10 by holding the handle 28. The handle axis 24 can intersect the joint assembly 96.

[0088] Referring to Figure 6 , in one aspect of the disclosure, the joint assembly 96 includes an upright connector 98 coupled with the lower end of the frame 18 through a swivel joint 100 to define the axis Y and coupled with the base 14 through a pivot joint 102 to define the axis X. Other configurations for a multi-axis joint are possible. For clarity, the rear housing shroud of the frame 18 is not shown in Figure 6 .

[0089] In the upright or storage position, the upright body 12 is oriented substantially upright relative to the surface to be cleaned and the appliance 10 is self-supporting, i.e., the appliance 10 can stand upright without being supported by something else. A joint lock (not shown) can selectively engage and lock the upright body 12 in the upright or storage position. When locked in the upright / storage position, the joint assembly 96 is locked and the upright body 12 is not movable about either axis X, Y. When tilted, the joint assembly 96 is released and the upright body 12 is movable about the axes X, Y relative to the base 14.

[0090] The conduit 94, by virtue of its defining the recycling path 50, Figure 2part of the handle 22, and thus is alternatively referred to herein as a suction conduit, which can pass outside the joint assembly 96. For example, as shown in Figure 3 The conduit 94 can be further disposed forward of the handle axis 24 in the upright storage position. At least a portion of the conduit 94 can be flexible to accommodate movement of the joint assembly 96, and can comprise a flexible tube or hose.

[0091] Wiring and / or conduits supplying power and / or cleaning fluid between the upright body 12 and the base 14 can extend through the joint assembly 96. As shown in Figure 6 The supply conduit 104 can extend from a supply tank, through the joint assembly 96 and into the base 14 to couple with the pump 44 Figure 4 ) as shown in

[0092] A flow sensor 106 can be disposed in the supply path between the supply tank 20 and the pump 44 to detect flow of fluid through the supply path. When no flow of fluid is detected, for example when the tank 20 is empty or the supply path is blocked, a signal can be sent to the UI 32 Figure 1 which outputs a visual and / or audible user alert. In one non-limiting embodiment, as shown in Figure 6 The sensor 106 is downstream of a valve receiver 108 for the tank 20, and can form part of the supply conduit 104. The supply tank 20 is removably mounted on the appliance 10, and includes an outlet valve (not shown) that automatically closes to prevent leakage when the tank 20 is removed from the appliance 10. The valve receiver 108 is configured to open the outlet valve when the supply tank 20 is mounted on the appliance.

[0093] Referring to Figure 4 and Figures 7-10 The fluid dispenser 38 according to one aspect of the disclosure can be a spray manifold 130 having a plurality of outlets 132 configured to spray cleaning fluid onto the brush roll 46. The spray manifold 130 has an internal passage 134 shaped to evenly distribute cleaning fluid to each of the outlets 132.

[0094] The spray outlets 132 are disposed on a front side 138 of the manifold 130. Cleaning fluid is supplied into the internal chamber 134 through an inlet port 142, which can be formed by an inlet connector of the spray manifold 130. As a non-limiting example, the inlet port 142 can supply fluid through a rear side 144 of the spray manifold 130, with the spray outlets 132 on the front side, e.g. front-facing, side 138 of the spray manifold 130.

[0095] Referring to Figure 4Pump 44 can supply fluid to an inlet connector 142 of spray manifold 130 through a pump conduit 140. Pump conduit 140 can include a flexible hose or tubing, and is schematically shown in Figure 4 In one embodiment, manifold 130 is laterally elongated and has two opposite lateral ends, and inlet connector 142 is disposed at one lateral end 146 thereof. Thus, pump conduit 140 can be connected to manifold 130 at one lateral end 146 thereof. Spray manifold 130 can be laterally elongated to provide spray coverage across brush roll 46.

[0096] Referring to Figures 7-9 As a non-limiting example, spray manifold 130 can include four spray outlets 132. Outlets 132 can be lateral, and in some configurations are equally spaced from one another. As shown, with multiple laterally spaced outlets 132, spray manifold 130 can spray fluid substantially across the entire length of brush roll 46. Other spray patterns are also possible.

[0097] An internal passage 134 within manifold 130 fluidly connects inlet connector 142 with spray outlets 132. Passage 134 can be laterally elongated to encourage spreading of fluid across its length, thereby evenly distributing fluid to each outlet 132. As a non-limiting example, passage 134 can be formed by a manifold body 148 having a cover 150, where manifold body 148 includes a front side 138 and a back side 144 of spray manifold 130, and cover 150 closes an open top of body 148 to seal passage 134. Cover 150 can be a separate piece due to manufacturing limitations, but in other embodiments can be integral with body 148. In still other embodiments, another wall of body 148 can initially be formed as a separate piece.

[0098] Inlet connector 142 can be disposed closer to one end 146 of manifold 130 than the other. In other words, inlet connector 142 can not be disposed at or near the center of manifold 130, but rather offset toward one end 146 thereof. As a non-limiting example, inlet connector 142 is disposed at one lateral end 146 of manifold 130 to supply liquid to a corresponding end of internal passage 134. In this way, liquid can flow through internal passage 134 generally in one direction to all outlets 132, rather than splitting and flowing in opposite directions.

[0099] The internal passages 134 of the manifold 130 can be configured to provide substantially uniform flow rates from all of the outlets 132. This can be particularly beneficial in embodiments where the inlet 142 is located at one end of the manifold 130. As the distance from the inlet 142 increases, the flow rate decreases if the passages 134 remain uniform, e.g., have a constant cross-sectional area, so less cleaning fluid will be dispensed through outlets farther from the inlet. To provide a uniform or substantially uniform fluid distribution, in one embodiment, the cross-sectional area of the passages 134 at the outlets 132 can be inversely proportional to the distance of the outlets from the inlet. In other words, the cross-sectional area of the passages 134 is smaller for outlets 132 disposed farther from the inlet 142. As a non-limiting example, the passages 134 are tapered to reduce the cross-sectional area of the passages 134, which compresses the flowing cleaning fluid and increases the flow rate. Although continuously tapered passages 134 are shown, in other embodiments, the passages 134 can have more or more discrete tapered segments, or segments with reduced cross-sectional area, to achieve a uniform or substantially uniform fluid distribution. As used herein, a uniform or substantially uniform fluid distribution includes up to a 15% variation in flow rate, or up to a 10% variation in flow rate.

[0100] As a non-limiting example, the passages 134 taper in the lateral direction such that the width W of the passages 134 decreases in a direction away from the inlet 142. In the illustrated embodiment, the front side 138 is defined by a tapered front passage wall 152 disposed at an angle to a rear passage wall 154 that defines the rear side 144 such that the front passage wall 152 and the rear passage wall 154 are not parallel. The width W of the passages 134 is defined between the inner surface of the front wall 152 and the inner surface of the rear wall 154. In another embodiment, the rear wall 154 can be tapered. Referring to Figure 9 , the width W of the passages 134 at the outlet 132 closest to the inlet 142 is greater than the width W at the other outlets 132, with the width W at the outlet 132 farthest from the inlet 142 being the smallest.

[0101] Referring to Figure 10 , the passages 134 can be further defined by a top passage wall, e.g., the hood 150, and a bottom passage wall 156, with the height H of the passages 134 defined between the top passage wall 150 and the bottom passage wall 156. The manifold 130 can be configured to occupy more vertical space than horizontal space, with the height H being greater than the maximum width W of the passages 134.

[0102] In the illustrated embodiment, the height H of the passages 134 remains constant as their width W decreases. In yet another example, the passages 134 can taper in the vertical direction such that the height H decreases in a direction away from the inlet 142. In yet another example, the passages 134 can taper in multiple directions, such as but not limited to the lateral direction and the vertical direction.

[0103] The spray outlets 132 can have various configurations. In one embodiment, each spray outlet 132 includes a plurality of discharge ports 160. Any suitable number, size, configuration, and angle of discharge ports 160 can be selected to facilitate the distribution of fluid. For example, according to the illustrated embodiment, each outlet 132 includes two discharge ports 160 that are oriented at an angle relative to the front wall 138 to spread the spray of fluid. Optionally, the ports 160 can be recessed and angled discharge walls 162 can extend from the discharge ports 160 to the front side 138 of the manifold to help direct the flow from the ports 160 and / or to protect the ports 160 from debris. Alternatively, the ports 160 can be flush with the front of the manifold 130.

[0104] According to one exemplary embodiment, the discharge ports 160 have an angle of about 90-120 degrees between them, with the ports 160 directing fluid spray at an angle of about 10-45 degrees from parallel to the front wall 138 to provide uniform wetting on the brush roll 46. Additionally, according to alternative embodiments, each discharge port 160 can have a different angle and / or a different size than adjacent discharge ports 160. Other spray configurations are possible and within the scope of the present subject matter.

[0105] With reference to Figure 11 The brush roll 46 can be housed in the brush chamber 62 and disposed at least partially within or adjacent the recovery path 50. In the present embodiment, the suction inlet port 60 is configured to draw liquid and debris from the brush roll 46. In the event that the brush chamber 62 is open to the surface to be cleaned, some liquid and debris can also be drawn from the surface to be cleaned. In this manner, the brush chamber 62 can form a portion of the recovery path 50 with the suction inlet port 60 opening to the brush chamber 62. The brush roll 46 is positioned for rotational movement about an axis of rotation 174 in a direction R.

[0106] An interference wiper 176 is mounted at the front of the brush chamber 62 and is configured to interface with the front of the brush roll 46 as defined by the direction of rotation R of the brush roll 46. The interference wiper 176 is generally below the dispenser 38 such that the wetted portion of the brush roll 46 rotates past the interference wiper 176, which can scrape any excess liquid from the brush roll 46 and / or evenly spread or distribute the cleaning fluid across the width of the brush roll before reaching the surface to be cleaned. Ensuring that the cleaning fluid is evenly distributed across the width of the brush roll can improve cleaning performance and minimize the drying time of the surface to be cleaned. Optionally, the interference wiper 176 can be disposed generally parallel to the surface to be cleaned. Other positions of the wiper 176 relative to the brush roll 46 are possible in which the wiper 176 is configured to interface with a portion of the brush roll 46.

[0107] The wiper 176 can be rigid, i.e. hard, and non-flexible, so that the wiper 176 does not yield or flex as a result of engagement with the brush roll 46. Alternatively, the wiper 176 can be formed of a rigid thermoplastic material, such as poly(methyl methacrylate) (PMMA), polycarbonate or acrylonitrile butadiene styrene (ABS). In other embodiments, the wiper 176 can be flexible.

[0108] A rubber roller 178 is mounted behind the brush roll 46 and brush chamber 62 and is configured to contact the surface to be cleaned as the base 14 is moved thereover. The rubber roller 178 wipes residual liquid from the surface to be cleaned so that it can be drawn into the recovery path via the suction inlet port 60, leaving a streak-free and moisture-free finish on the surface to be cleaned. Alternatively, the rubber roller 178 can be arranged substantially normal or perpendicular to the surface to be cleaned. The rubber roller 178 can be smooth as shown, or alternatively include a protrusion on its end for slightly lifting the lower portion of the rubber roller 178 to allow working air to pass underneath the rubber roller 178 on the return stroke.

[0109] The rubber roller 178 can be pliable, i.e. flexible or elastic, so as to easily flex according to the contours of the surface to be cleaned, but remain un-deformed during normal use of the apparatus 10. Alternatively, the rubber roller 178 can be formed of an elastic polymeric material, such as ethylene propylene diene rubber (EPDM), polyvinyl chloride (PVC), a rubber copolymer such as nitrile rubber, or any material known in the art having sufficient rigidity to remain substantially un-deformed during normal use of the apparatus 10.

[0110] Figure 12 is an exploded view of the base 14. The brush roll 46 can be a hybrid brush roll for use on hard and soft surfaces and for wet or dry vacuum cleaning. In one embodiment, the brush roll 46 includes a combination of microfibers 180 and bristles 182 for agitation. The bristles 182 can be tufted or monolithic bristle strips and be composed of nylon or any other suitable synthetic or natural fiber. The microfibers 180 can be composed of a combination of polyester, polyamide or a material including polypropylene or any other suitable material known in the art for composing microfibers. Other embodiments of the brush roll are possible, such as a bristle brush roll adapted for use on soft surfaces and having bristles 182 and no microfibers 180, and / or a microfiber brush roll adapted for use on hard surfaces and having microfibers 180 and no bristles 182. Alternatively, the apparatus can be provided with a plurality of interchangeable brush rolls, which allows the brush roll to be selected according to the cleaning task to be performed or according to the type of floor to be cleaned.

[0111] Reference is made to Figures 11-12A fluid distributor 38, such as a spray manifold 130, is disposed at a rear wall 136 of the brush chamber 62. The spray manifold 130 is thus disposed generally rearward of the brush roll 46 and can direct a spray of cleaning fluid toward an upper rear portion of the brush roll 46. According to one example embodiment, a front side 138 of the manifold 130 can define a portion of the rear wall 136 of the brush chamber 62, with the outlet 132 opening into the brush chamber 62. In alternative embodiments, the front side 138 can be recessed into the rear wall 136 or can protrude beyond the rear wall 136.

[0112] According to one aspect, a suction guard 164 is disposed between the suction inlet port 60 and the outlet of the fluid distributor 38 to prevent cleaning fluid distributed from the fluid distributor 38 from being immediately and / or prior to wetting the brush roll 46, drawn into the recovery path 50. Without the suction guard 164, cleaning fluid can be drawn directly into the recovery path 50 and can completely bypass the brush roll 46. The suction guard 164 protrudes partially into the nap of the microfiber brush roll 46 (or other agitating material in the case of a non-microfiber brush roll) and prevents cleaning fluid from being drawn into the suction inlet 60 immediately after being distributed from the fluid distributor 38. The suction guard 164 does not seal the brush roll 46 and working air can still move through the porous nap (or other agitating material) of the brush roll 46 such that at least some suction is present at the forward-most portion of the brush chamber 62, such as between the shroud 188 and the brush roll 46.

[0113] The suction guard 164 is mounted at a rear portion of the brush chamber 62 and is configured to interface with a portion of the brush roll 46, as defined by the direction of rotation R, that has just passed the suction inlet port 60. The suction guard 164 is located generally below the distributor 38 such that a portion of the brush roll 46 to be wetted by the distributor 38 is located above the suction guard 164. Optionally, the suction guard 164 can be a laterally elongated rib disposed above the axis 174 of the brush roll 46, generally parallel to the surface to be cleaned. The length of the rib can be equal to, less than, or greater than the length of the brush roll 46. Other positions and configurations of the suction guard 164 relative to the brush roll 46 and / or the fluid distributor 38 are possible.

[0114] In the present embodiment, the suction guard 164 is integrated with the fluid distributor 38 and can be particularly integrally molded with and formed from the spray manifold 130 to protrude forwardly from the front side 138 of the manifold 130. In other embodiments, the suction guard 164 is not integrated with the fluid distributor 38 and can be disposed separately therefrom.

[0115] The suction guard 164 can be rigid, i.e., hard, and non-flexible, so that the suction guard 164 does not yield or flex as a result of engagement with the brush roll 46. Optionally, the wiper 176 can be formed of a rigid thermoplastic material, such as polymethyl methacrylate (PMMA), polycarbonate, or acrylonitrile butadiene styrene (ABS).

[0116] The brush roll 46 can be configured to be removed from the base 14 by a user, such as for cleaning and / or drying the brush roll 46. The brush roll 46 can be removably mounted in the brush chamber 62 by a brush roll latch 184, a portion of which can be disposed in the brush chamber 62 with a mating portion disposed on a non-rotatable portion of the brush roll 46. The non-rotatable portion can include a handle 186 to assist in removing the brush roll 46 from the brush chamber 62.

[0117] Reference Figures 11-12 In one aspect of the disclosure, the base 14 can have a cover 188 removably coupled to the base housing 90 and at least partially defining the brush chamber 62. An inner surface of the cover 188 can define the brush chamber 62 with the inner surface of the cover 188 proximate the brush roll 46. In this way, the cover 188 forms a portion of the recovery path 50 with the suction inlet port 60 opening to the brush chamber 62 defined by the cover 188. At least a portion of the cover 188 can be formed of a translucent or transparent material such that the brush roll 46 is at least partially visible to a user through the cover 188.

[0118] The cover 188 can curve generally in a forward and downward direction to extend over the top and front sides of the brush roll 46. The cover 188 can wrap around the brush roll 46 and in front thereof to define a front portion of the base 14 at an outer side thereof and a front portion of the brush chamber 62 at an inner side thereof.

[0119] Optionally, the interference wiper 176 is mounted on an inner front side of the cover 188 and projects into the brush chamber 62. A bumper 190 can be disposed on the cover 188, such as at a lower front edge thereof opposite the interference wiper 176.

[0120] A portion of the base housing 90 can define a rear side 138 of the brush chamber 62 with the suction inlet port 60 disposed proximate a middle of the rear side 138. The cover 188 can define a front side 194 and an upper side 196 of the brush chamber 62.

[0121] The cover 188 can be removed from the base housing 90 without the use of tools. Optionally, the base 14 can have a cover latch that releasably secures the cover 188 on the base housing 90. In one embodiment, the cover latch includes two spring-mounted latch actuators 198 that are pinched together to release the cover 188. The latch actuators 198 slide inwardly in opposite directions from a latched position to an unlocked position, thereby allowing the brush roll cover 188 to be removed. Other cover latches are also possible.

[0122] The shroud 188 can be released from the base 14 in linear or pivotal motion as desired. The brushroll shroud 188 can be separate from the base 14 in the open position, or can be connected to the base 14 in the open position. The latching actuator 198 can also be used to lift the shroud 188 from the base housing 90.

[0123] The base 14 can include a headlight that illuminates the surface to be cleaned outside of the base 14. In one implementation, the headlight includes a light guide 202 (e.g., a light pipe) that transmits or carries light from an internal light source 204 to the floor surface in front of the base. In certain implementations, the shroud 188 can include the light guide 202, and the light source 204 can be disposed within the base housing 90.

[0124] Figure 13 is a partial exploded perspective view of one implementation of the recovery tank 22, and Figure 14 is a close-up cross-sectional view showing the recovery tank 22. The recovery tank 22 can include a recovery tank container 210 that forms a collection chamber 212 for the recovery system, with a hollow standpipe 214 therein. The standpipe 214 can be oriented so that it extends generally upward within the tank container 210 in the installed position of the tank 22. The standpipe 214 forms a flow path between a tank inlet 216 formed at a lower end of the tank container 210 and an opening 218 at an upper end of the standpipe 214 within the interior of the tank container 210. When the recovery tank 22 is installed to the frame 18 as shown, the inlet 216 is aligned with the conduit 94 to establish fluid communication between the base 14 and the recovery tank 22. The standpipe 214 can be integrally formed with the tank container 210, or can be separately formed and attached thereto. Figure 14

[0125] As briefly discussed above, the tank 22 can include a separator in the form of a baffle 58 that is configured to separate liquid and / or debris from the working airflow that enters the recovery tank 22. The baffle 58 is a flow diverter or other deflection feature that directs the working airflow toward the interior tank volume near the front, rear, and sides of the tank, where the velocity of the working airflow is reduced so that liquid and / or debris separates from the working airflow and collects in the collection chamber 212 near the sides and / or bottom of the tank 22.

[0126] The baffle 58 is preferably positioned so that at least a portion of the incoming flow of dirty fluid will impact the baffle 58 as it exits the standpipe 214, i.e., will contact the lower side 220 of the baffle 58. This can help cause the flow of dirty fluid to change direction relatively quickly and reduce in velocity, which can tend to help separate liquid and / or debris from the working airflow. The separated liquid and debris can collect in the container 210, while the remaining portion of the incoming working airflow can continue downstream, optionally to another separator and / or filter as described below.

[0127] ​The baffle 58 is spaced apart from the inner surface 224 of the container 210, and this space creates at least one flow gap between the baffle 58 and the container 210 to allow airflow through the container 210. In one configuration, the baffle 58 is positioned in the lateral direction (e.g., in...). Figure 14 The baffle 58 has a first or lateral width 226 (from front to back in the orientation of FIG. 15), which stops before reaching the front and rear walls of the container 210 to form a forward flow gap 228 and a rearward flow gap 230. The baffle 58 has a second or lateral width 232 in the lateral direction (e.g., from one side to the other in the orientation of FIG. 15), which stops before reaching the side walls of the container 210 to form lateral flow gaps 234, 236. The flow gaps 228, 230, 234, 236 may be continuous with each other, forming a generally annular flow gap extending around the periphery of the baffle 58 and the inner surface 224 of the container 210. The width of the flow gaps 228, 230, 234, 236 may increase or decrease around the periphery of the baffle 58.

[0128] The baffle size can be selected such that the baffle 58 can cover the entire riser opening 218, including, for example... Figure 14 The front-to-back view is shown, and the side-to-side view is shown in Figure 15. Therefore, the first width 226 and the second width 232 of the baffle 58 can be larger than the diameter 238 of the vertical tube opening 218 or other corresponding dimensions.

[0129] The baffle 58 may include a curved deflector surface 222 that defines a lower side 220 of the baffle 58 and is spaced apart from and faces the opening 218 of the riser 214. The curvature of the deflector surface 222 may extend in a front-to-back direction, for example... Figure 14 As shown, and / or extending in a direction from one side to the other, such as shown in Figure 15. In other embodiments, the deflector surface 222 may have one or more straight or angled portions relative to the opening 218.

[0130] The deflector surface 222 has a front edge 240, a rear edge 242, and side edges 244, 246. Edges 240-246 may define the periphery of the baffle 58 and are spaced inwardly from the inner surface 224 of the can container 210.

[0131] In one embodiment, the baffle 58 is offset relative to the riser opening 218 to prevent debris from accumulating at the rear of the tank 22. This offset can be a lateral offset, a transverse offset, a vertical offset, or any combination thereof. In one embodiment, refer to... Figure 14The front edge 240 of the deflector surface 222 is disposed further from the riser 214 than the rear edge 242 to provide a lateral offset on the front side of the canister 22. To provide a vertical offset on the front side of the canister 22, the deflector surface 222 is angled upward in the forward direction, and can additionally have a sharper forward curvature portion 248 proximate the front edge 240 on the front end of the baffle 58, and a more gradual rearward curvature portion 250 proximate the rear edge 242 on the rear end of the baffle 58. This lateral and vertical offset causes the debris to flow upward and away from the riser 214, and toward the front side of the canister 22. With reference to FIG. 15, the side edges 244, 246 of the deflector surface 222 are disposed equidistant from the riser 214, which causes the debris to flow toward both lateral sides of the canister 22. In another embodiment, the baffle 58 can have a lateral offset to cause more flow toward one lateral side of the canister 22. In yet another embodiment, the baffle 58 can have a lateral offset without a vertical offset, or a vertical offset without a lateral offset, and achieve improved clog resistance, albeit possibly less than a baffle with both lateral and vertical offsets.

[0132] To minimize debris buildup on the underside of the baffle 58, the deflector surface 222 can have a smooth curvature. The constant scouring action of the incoming fluid against the smooth curved surface 222 helps keep the baffle 58 free of debris. Additionally, the exposed top surface of the baffle 58 can be smoothly (and downwardly) curved to allow debris to easily fall away.

[0133] During operation, the canister 22 is generally tilted rearward due to the incline of the upright body 12. Thus, without a baffle, or with a baffle that directs debris uniformly in multiple directions, debris tends to collect in the rear of the canister 22, and can clog the canister 22 before it is actually full. The offset baffle 58 gradually directs debris downward toward the front and sides of the canister 22, away from the rear wall of the canister 22, and prevents excessive accumulation of debris in the rear of the canister 22 to prevent clogging.

[0134] Referring to Figure 13 The recycling canister 22 includes a lid 252 sized to receive on the canister container 210. The lid 252 at least partially encloses the open top of the canister container 210, and can further define an air outlet 254 (FIG. 15) of the recycling canister 22 to the downstream suction source 54.

[0135] The recovery tank 22 may include at least one filter located downstream of the baffle 58 for separating finer debris from the working airflow. In one embodiment, a motor filter (or pre-motor filter) 256 is disposed at the air outlet 254, and may be particularly disposed on the downstream side of the air outlet 254. The filter 256 may be supported by a cover 252, and the cover 252 may include a filter receiver 258 on its upward-facing side, sized to removably receive the filter 256. The air outlet 254 may be disposed within and / or defined by the filter receiver 258.

[0136] In one embodiment, the motor filter 256 includes a pleated filter medium and may be made of a material that remains porous when wet. In another embodiment, the filter 256 includes a foam filter medium.

[0137] In addition to the motor filter 256, the canister 22 may include a pre-filter 260, which blocks some debris from reaching the motor filter 256, thereby retaining more debris within the canister container 210 and away from the motor filter area. The pre-filter 260 is located upstream of the air outlet 254, for example, on the side facing the canister container 210, and is preferably supported by a cap 252 for removal together with it. In one embodiment, the pre-filter 260 may include a mesh configured to filter particle sizes larger than the motor filter 256. Fine debris may be stopped at the pre-filter 260, while ultrafine debris is stopped by the motor filter 256.

[0138] Baffle 58 can be attached to lid 252 for removal together with it from tank container 210. Baffle 58 is thus independent of riser 214, for example, not attached to or supported by it. Can lid 252 may include a support structure that holds baffle 58 and may also support one or both of motor filter 256 and pre-filter 260. Removing lid 252 to empty container 210 removes baffle 58 and filters 256, 260.

[0139] The recycling tank latch 262 may optionally be supported by the cover 252 for securing the recycling tank 22 to the upright body 12 within the recycling tank receiver 114, as shown below. Figure 14 As shown. Latch 262 can be configured to releasably lock the recycling can 22 to the upright body 12, such that the user must actuate latch 262 before pulling the can 22 away from the frame 18. In another embodiment, latch 262 can releasably latch or hold, but not lock, the can 22 to the frame 18, allowing the user to easily apply sufficient force to the can 22 itself to pull the can 22 away from the frame 18.

[0140] The recovery tank 22 can also include a removable coarse filter 264 configured to filter out large debris and hair from the tank container 210 prior to emptying. The coarse filter 264 is configured to collect large debris and hair while passing liquid and smaller debris back into the tank container 210. One embodiment of a suitable filter is disclosed in U.S. Patent Application Publication No. 2019 / 0159646, filed November 30, 2017, which is incorporated herein by reference in its entirety. For purposes of this specification, large debris is any debris having a maximum dimension of, for example, greater than or equal to 0.5 mm to 6 mm, preferably 3 mm in length or diameter, while small debris is any debris having a maximum dimension of, for example, less than the length or diameter of the larger debris. An example of a piece of large debris includes a hair strand having a length greater than 3 mm. Examples of small debris include coffee grounds and pieces having a diameter less than 3 mm.

[0141] In Figure 15B In the embodiment shown, the working air flow path through the tank 22 is generally shown by the dashed line, which defines a portion of the recovery path. The working air, which can have entrained debris and / or liquid and include a debris-laden and / or liquid-laden air stream, enters through the standpipe 214 and encounters the baffle 58. Some debris and / or liquid can fall to the bottom of the tank 22 after directly impacting the baffle 58, while other debris and / or liquid can separate by reducing the air velocity. By significantly slowing the air velocity after entering the tank 22, large debris and liquid droplets are no longer able to be carried in the working air path and fall from the working air path to the bottom of the tank 22, where the baffle 58 directs the debris and liquid toward the front and sides of the tank 22. After being deflected by the baffle 58, the working air travels relatively slowly upward toward the top of the container 210 and exits the container 210 through the air outlet 254 in the lid 252. Fine debris is captured by the pre-filter 260, and ultra-fine debris is captured by the motor filter 256. The relatively clean, filtered, and / or liquid-free air passes to the suction source 54.

[0142] In one embodiment, the recovery tank 22 can have a liquid level sensing system 266 configured to detect liquid at one or more liquid levels within the recovery tank 22 and determine when to shut down or otherwise interrupt the recovery system. Additionally, the sensing system 266 can detect whether the recovery tank 22 is missing from the appliance 10.

[0143] The sensing system 266 can include any suitable components for sensing liquid within the recovery tank 22. One embodiment of a suitable floatless tank and sensing system is disclosed in U.S. Patent Application Publication No. 2021 / 0267428, filed December 15, 2020, which is incorporated herein by reference in its entirety. The '428 disclosure further discloses a system and method for sensing foam in the tank 22, which can be provided on the apparatus 10 shown herein. In another implementation, the tank 22 can include a float-activated shutoff valve.

[0144] In the illustrated embodiment, the sensing system 266 includes sensors or probes 268, 270 that can detect liquid. The probes 268, 270 can be electrically coupled with power terminals 272, 274 that are optionally provided on the lid 252, which couple with electrical contacts (not shown) on the recovery tank receiver 114 when the recovery tank 22 is installed on the frame 18 to power the probes 268, 270. The electrical contacts on the recovery tank receiver 114 are electrically coupled with a power source of the apparatus 10, such as the battery 66.

[0145] The probes 268, 270 can be supported by the lid 252 and can be offset from the standpipe 214 and the baffle 58. When the lid 252 is coupled to the container 210, the probes 268, 270 protrude into the collection chamber 212. It is further contemplated that the sensors can be molded directly into the sidewall of the container 210, thereby eliminating the probes.

[0146] The sensor probes 268, 270 are coupled with the controller 72 Figure 2 One sensor 268 can emit a liquid sensing signal that is detected by the other sensor 270. If the signal indicates that the liquid in the recovery tank 22 is at or above a critical level, the controller 72 can shut down at least one electrical component of the apparatus 10. Such a component can include the vacuum motor 56, and optionally also the pump 44 and / or the brushed motor 64. In another construction, the controller 72 can additionally or alternatively activate a shutoff valve (not shown) to prevent liquid from entering the suction source 54 in response to the signal.

[0147] In one aspect of the disclosure, the recovery tank 22 defines a first upstream portion of the recovery path 50 Figure 2 upstream of the vacuum motor 56, and defines a second portion of the recovery tank 22 downstream of the vacuum motor 56. For example, a portion of the working air exhaust path downstream of the vacuum motor 56 extends through a portion of the recovery tank 22. In one implementation, the recovery tank 22 can have at least one exhaust aperture that defines an outlet 53 of the recovery path 50, such as a clean air outlet for a floor cleaner. In the illustrated implementation, two exhaust apertures 53 are provided on opposite sides of the recovery tank 22, although other numbers and locations of exhaust apertures are possible. In one implementation, the exhaust apertures 53 are incorporated into the lid 252 of the recovery tank 22.

[0148] Figure 16 is a block diagram of a portion of the electrical components of the device 10. The main controller 72 is operably coupled with at least the vacuum motor 56, the pump 44, and the brushed motor 64. The controller 42 is also operably coupled with the base PCB 74, the handle controller 278 of the handle UI 30, and the display controller 280 of the display UI 32. The controllers 278, 280 can include PCBs, and can be referred to herein as the handle PCB 278 and the display PCB 280, respectively. The controller 72 is also operably coupled to one or more sensing components, such as the recovery tank level sensing system 266 (shown) and the floor type sensing mechanism 282, which are described in further detail below. Figure 13

[0149] The device 10 can include a wireless communication module, such as a Wi-Fi module, which can wirelessly communicate with external devices, such as a networked cloud device, a smartphone, or a tablet. The Wi-Fi module can detect the presence of a Wi-Fi network, the signal strength, the unique router identification data, or any combination thereof, and can connect the device 10 to the Internet via a local Wi-Fi network. The Wi-Fi module can be integrated with the main controller 72. The Wi-Fi network connection status can be displayed on the display UI 32.

[0150] The first UI 30 can include one or more input controls 284, 286, 288, 290 in registry with the handle PCB 278. One input control can include an on / off button, such as the power button 284, to control the power to one or more electrical components of the device 10. For example, the power button 284, as well as activating and deactivating the vacuum motor 56 and the brushed motor 64. By default, pressing the power button 284 can turn on both motors 56, 64, and operate the device 10 in a dry vacuum cleaning mode. Other default modes of the device 10 are possible, including a wet default mode or a default mode that activates electronic components of the device 10 other than the motors 56, 64 when the power button 284 is pressed.

[0151] Another input control can be a mode button 286 to select between different modes when the device 10 is turned on. For example, repeatedly pressing the mode button 286 can cycle between dry cleaning and wet cleaning. In another embodiment, repeatedly pressing the mode button 286 can cycle between dry cleaning, wet cleaning, and self-cleaning, or any combination thereof, in any order.

[0152] ​Another input control can be a turbo button 288 to activate an intense cleaning mode, as described in further detail below. The turbo button 288 can operate a momentary switch that is only closed when the user presses the button 288. Thus, upon release of the turbo button 288, the turbo mode ends and the device 10 can automatically revert to the previous mode, e.g., the non-turbo mode.

[0153] Another input control can be a self-clean button 290 to activate and deactivate a self-cleaning mode of the device 10, in which the device 10 performs an automatic, unattended purge cycle. In one aspect of the disclosure, operation of the self-clean mode can require the device 10 to be docked on the tray 70 Figure 1 ) and / or satisfy another condition for self-cleaning. When undocked and / or when the other condition for self-cleaning is not satisfied, the purge cycle can be inoperable, e.g., selection of the self-clean button 290 will not activate the self-clean mode. In other embodiments, a separate self-clean button is not provided and the self-clean mode is initiated via the mode button 286.

[0154] The display UI 32 includes a display 294, such as but not limited to an LED matrix display or a touch screen. The display 294 can include a plurality of status indicators that inform the user of various detailed device information, such as but not limited to the current cleaning mode (i.e., hard floor, small carpet, dry vacuum cleaning, turbo, self-clean), battery status, Wi-Fi connection status, supply fluid level, supply tank presence, dirty fluid level, recovery tank presence, filter status, floor type, or any combination thereof. The status indicators can be visual displays and can include any of a variety of lights, such as LEDs, text displays, graphical displays, or any variety of known status indicators. The UI 32 can also include a speaker (not shown).

[0155] In one aspect of the disclosure, the device 10 can have a plurality of user-selectable cleaning modes, such as at least one wet cleaning mode, at least one dry cleaning mode, and a self-clean mode. These modes can have associated operating parameters for the pump 44, the vacuum motor 56, and / or the brushroll motor 64. In one embodiment, the device 10 has a plurality of dry cleaning modes and a plurality of wet cleaning modes, and these cleaning modes can include a dry vacuum cleaning mode, a hard floor wet mode, a small carpet wet mode, and at least one turbo mode.

[0156] In one embodiment of the dry vacuum cleaning mode, the vacuum motor 56 and the brush motor 64 are activated, and the vacuum motor 56 operates at a first power level, the brush motor 64 operates at a first speed. In the dry vacuum cleaning mode, no cleaning fluid is dispensed, and the pump 44 is deactivated. The dry vacuum cleaning mode is selected using the mode button 286.

[0157] In one embodiment of the hard floor mode, the vacuum motor 56, the pump 44, and the brush motor 64 are activated, and the vacuum motor 56 operates at a first power level, and the pump 44 dispenses cleaning fluid from the fluid dispenser 38 at a first flow rate. As described in further detail below, the hard floor mode can be automatically selected based on the floor type in the event that the device 10 is set for wet cleaning using the mode button 286. In another embodiment, the hard floor mode can be selected by the user using the mode button 286.

[0158] In one embodiment of the small rug mode, the vacuum motor 56, the pump 44, and the brush motor 64 are activated, and the pump 44 dispenses cleaning fluid from the fluid dispenser 38 at a second flow rate. The second flow rate can be higher than the first flow rate of the hard floor mode. For example, in the small rug mode, the cleaning fluid can be dispensed at a rate that is at least 2 times the rate of the hard floor mode. The vacuum motor 56 can operate at a second power level, which can be higher than the first power, to provide greater suction performance by the device 10 in the small rug mode. In another embodiment, the second power level is the same as the first power level of the hard floor mode. As described in further detail below, the small rug mode can be automatically selected based on the floor type in the event that the device 10 is set for wet cleaning using the mode button 286. In another embodiment, the small rug mode can be selected by the user using the mode button 286.

[0159] The turbo mode can be initiated with the device 10 in the dry vacuum cleaning mode, the hard floor mode, or the small rug mode. In the turbo mode, the vacuum motor 56 can operate at a higher power level than the currently selected mode to provide maximum suction performance of the device 10. The brush motor 64 can operate at a higher speed than the currently selected mode to provide greater agitation. Optionally, when the currently selected mode is a wet mode, the flow rate can be increased, remain the same, or decrease in the turbo mode. The turbo mode is selected using the turbo button 288.

[0160] In one embodiment of the self-cleaning mode, the device 10 performs an automatic, unattended cleaning cycle. During the cleaning cycle, the vacuum motor 56, the pump 44, and the brush motor 64 are activated in an automatic sequence, and cleaning fluid is sprayed on the brush roll 46, the brush roll 46 is rotated, and the fluid is extracted and deposited into the recovery tank 22, thereby also flushing the brush chamber 62 and the recovery path 50. The vacuum motor 56, the pump 44, and the brush motor 64 can be activated individually or simultaneously, and can be activated for any predetermined time, including overlapping and non-overlapping times. For example, the vacuum motor 56, the pump 44, and the brush motor 64 can be activated immediately. In another embodiment, the pump 44 and the brush motor 64 can be activated for a first predetermined period of time, and the vacuum motor 56 is activated thereafter. In yet another embodiment, the pump 44 can be activated for a first predetermined period of time, the brush motor 64 can be activated for a second predetermined period of time after the pump 44 is deactivated, and the vacuum motor 56 is activated during or after the activation of the pump 44 and / or the brush motor 64. Additional cleaning cycles are possible. The self-cleaning mode can be configured to last for a predetermined amount of time or until the cleaning fluid in the supply tank 20 has been depleted.

[0161] As non-limiting examples, in one self-cleaning mode, the pump 44 and the brush motor 64 are activated for 10 seconds, then the brush motor 64 remains on for another 10 seconds while the pump 44 is deactivated to rotate the brush roll 46 without additional fluid delivery, and finally the brush motor 64 remains on for another 20 seconds while the vacuum motor 56 is activated. Overall, the cleaning cycle lasts 40 seconds.

[0162] While the operating parameters can vary, in one embodiment, during the self-cleaning mode, the vacuum motor 56 and the brush motor 64 can operate with the same parameters as the dry vacuum cleaning and / or hard floor mode, and the pump 44 can operate at a higher flow rate to flush the recovery path.

[0163] Table 1 below lists some non-limiting examples of operating parameters for these modes. Other operating parameters for these modes and other cleaning modes are possible.

[0164] Table 1

[0165] Mode Pump Vacuum motor Brushed motor Dry vacuum Off Low Low Turbodry Off High High Hard floor wet Low Low Low Small carpet wet High Medium Low Turbo wet Medium High High Self-cleaning High Low Low

[0166] Table 2 below lists some non-limiting examples of operating parameter values for these modes, including preferred values and ranges for some parameters. Other operating parameters for these modes are possible.

[0167] Table 2

[0168]

[0169] In all wet cleaning modes (e.g., user operated or attended modes), the release of cleaning fluid can be continuous or automatic, e.g., no trigger to press, and can be controlled based on floor type. In an alternative embodiment, the release of cleaning fluid can be manually controlled by the user, e.g., using a trigger. In an unattended self-cleaning mode, the release of cleaning fluid is automatic.

[0170] Figure 17 One arrangement of the UI 30, 32 for the floor cleaner 10 is shown, along with a portion of the handle 16 and frame 18. For the handle UI 30, various arrangements of the buttons 284, 286, 288, 290 are possible. In one embodiment, the buttons 284, 286, 288, 290 are arranged according to a predetermined frequency of use, with the mode button 286 being disposed highest on the front side of the handle 28, e.g., closest to the user, followed by the turbine button 288, and the power button 284 being disposed lowest on the handle 28, e.g., farthest from the user. The self-cleaning button 290 can be separate from the other buttons, and can be disposed on the upper rear of the handle 28.

[0171] During operation, the user can select the mode button 286 to switch through the plurality of cleaning modes. With the UI 30 arranged on the handle 16, the user can conveniently hold the handle 28 with one hand, and use the thumb of the same hand to press the mode button 286 and / or the turbine button 288 until the desired mode is activated. The selected cleaning mode can be displayed by the second UI 32.

[0172] The second UI 32 and its display 294 can be located on the frame 18. To increase the visibility of the UI 32 from multiple viewing angles and reduce glare, the UI 32 can be angled. With the UI 32 disposed at an angle, the UI 32 can be viewed from a viewing angle behind the device 10 with the user in a typical operating position with the upright body 12 tilted Figure 3 ) and can be viewed from a viewing angle from the front or side of the device 10 with the user in a parked / stored position with the upright body 12 upright Figure 1 and Figure 17 .

[0173] The display 294 has an outer or visible surface 294, and is supported on a sloped wall 296 of the frame 18. The sloped wall 296 is generally located below the handle 16, on the front side of the frame 18.

[0174] In one embodiment, the display 294, or its visible surface 294, is disposed at an angle A of 115-135 degrees, or 125 degrees, relative to the handle axis 24.

[0175] Referring to Figure 16In one aspect of the disclosure, the device 10 is provided with a floor type sensing mechanism 282 comprising at least one floor type sensor. By detecting whether the floor type under the device is a hard surface or a soft surface, a cleaning mode can be set and / or at least one operating parameter of the device 10 can be adjusted. The main controller 72 receives input from the floor type sensor and can operate electrical components of the device 10 based on such input. The controller 72 can receive sensor input continuously or periodically and can adjust or update operating parameters when the floor type changes.

[0176] The controller 72 can operate the vacuum motor 56 based on the floor type. For example, the controller 72 can operate the vacuum motor 56 at a lower power on hard floors to conserve energy or at a higher power on soft floors to increase pickup of liquids and debris.

[0177] The controller 72 can operate the brush motor 64 based on the floor type. For example, the controller 72 can operate the brush motor 64 at a lower speed on hard surfaces to reduce debris scatter or at a higher speed on soft surfaces to increase agitation.

[0178] The controller 72 can operate the pump 44 based on the floor type. For example, the controller 72 can operate the pump 44 at a lower flow rate on hard surfaces to reduce application of cleaning fluid or at a higher flow rate on soft surfaces to increase application of cleaning fluid.

[0179] In one implementation, the floor type sensing mechanism 282 comprises at least one brush sensor 298, 300. A brush sensor is a sensor that senses a parameter related directly or indirectly to an aspect of the brush roll 46. The floor type sensing mechanism can use this parameter to infer the current floor type. The brush sensor can be a speed sensor to sense a revolutions per minute (RPM) value of the brush roll 46, a speed sensor to sense an RPM value of the brush roll motor 64, an electrical sensor to sense an electrical parameter (e.g., current or voltage) of the brush roll motor 64, a torque sensor to sense a torque parameter of the brush roll motor 64, etc. Other non-brush floor type sensors can be used, such as but not limited to a time-of-flight sensor, an ultrasonic sensor, an accelerometer, a pressure sensor, an optical sensor, or any combination thereof.

[0180] It is contemplated that multiple floor type sensors can provide information (e.g., signals, data) for determining or inferring the floor type. For example, the floor type sensing mechanism 282 can require signals from both a motor current sensor and a motor speed sensor to infer the floor type.

[0181] Figure 18An exemplary process 302 for operating a surface cleaning apparatus 10 according to one or more floor type sensing techniques is shown. According to process 302, and with additional reference to Figure 16 Apparatus 10 is powered on (step 304), for example by pressing power button 284, and at least one operating parameter of apparatus 10 is set to a default level (step 306). Such operating parameters can include, but are not limited to, cleaning fluid flow rate, brushroll speed, and suction power. The floor type is determined based on input from floor type sensing mechanism 282 (step 308). Such determination can include a direct determination or a determination based on inference, and can be performed by an on-board computing device, for example by main controller 72, base controller 74, a combination thereof. Once the floor type determination is made, controller 72 determines whether the floor type is the default type (e.g., the type corresponding to the default operating parameters) (step 310), or whether the floor type has changed, and whether to adjust at least one operating parameter of apparatus 10 (step 312). Adjusting at least one operating parameter of apparatus 10 can include adjusting cleaning fluid flow rate, brushroll speed, suction power, or any combination thereof.

[0182] Referring back to Figure 16 In one aspect of the disclosure, floor type sensing mechanism 282 includes a current sensor 298 that measures current draw of brush motor 64 and a speed sensor 300 that measures speed of brush motor 64. Base PCB 74 can receive and process the sensor data, and can calculate a torque value that is communicated to main controller 72. Alternatively, main controller 72 can perform the receiving, processing, and / or calculation.

[0183] Figure 19 An exemplary process 314 for operating a floor cleaning apparatus according to torque sensing is shown; according to process 314, and with additional reference to Figure 16For example, by pressing the power button 284, the device 10 is powered on (step 316) and operates in a default cleaning mode (step 318). The default cleaning mode can be either a wet or dry cleaning mode, with operating parameters defaulting to hard floors. The current draw and speed of the brush motor 64 is sensed (step 320) and the controller 72 calculates a torque value T from the sensed current and speed (step 322). The calculated torque value T is compared to a reference value A stored in the memory of the device 10, where the reference value A represents a threshold between hard and soft floor types (step 324). For example, traversing a soft surface (e.g., a floor covered in carpet) will generally force the brush roll motor 64 to work harder (i.e., produce a higher torque), while traversing a hard surface (e.g., a wood or tile floor) will allow the brush roll motor 64 to work more easily (i.e., produce a lower torque). If the calculated torque is found to be less than the reference value A, the current floor type being traversed can be inferred to be the default floor type, e.g., a hard surface, and the device 10 continues to operate in the default mode (step 318). If the calculated torque is found to be greater than the reference value A, the current floor type being traversed can be inferred to be a soft surface. The controller 72 updates the cleaning mode to a soft surface cleaning mode (step 326) and can adjust the operating parameters of the pump 44, vacuum motor 56, and / or brush motor 64.

[0184] While steps 320-324 of process 314 calculate and use the torque on the brush motor 64 to infer the floor type, other methods of inferring or determining the floor type can be used. For example, in another embodiment, the floor type is determined based on current alone, without calculating torque.

[0185] Figure 20 Another example process 340 for operating a floor cleaning device according to one or more mode selections and floor type sensing techniques is shown. According to process 340, and with additional reference to Figure 16 , the device 10 is powered on, e.g., by pressing the power button 284 (step 342), and can operate in a default cleaning mode or can wait for the user to select a cleaning mode, e.g., by pressing the mode button 286 (step 344). It should be noted that at any time during process 340, the user can switch between dry and wet cleaning by pressing the mode button 286.

[0186] In the case of a dry cleaning selection (step 346), the brush roll speed and suction power are set via control of the brush motor 64 and vacuum motor 54 to dry mode levels (step 348). For example, the device 10 can operate in a dry vacuum cleaning mode according to the operating parameters of Table 1 or Table 2, and others are disclosed herein. In the case of a turbine mode selection (step 350), for example by pressing the turbine button 288, the brush roll speed and / or suction power are increased (step 352). For example, the device 10 can operate in a turbine dry mode, where the operating parameters are according to Table 1 or Table 2, and others are disclosed herein.

[0187] In the case of a wet cleaning selection (step 354), the device 10 enters an intelligent wet cleaning process, where the operating parameters are set based on the floor type. The floor type is determined based on input from the floor type sensing mechanism 282 (step 356). When the floor type is known, an appropriate wet cleaning mode can then be set, for example a hard surface cleaning mode or a soft surface cleaning mode, so that the surface can be optimally cleaned. Alternatively, instead of or in addition to setting a wet cleaning mode, at least one operating parameter of the device 10 can be set or adjusted. In certain embodiments, the fluid dispensing flow rate, brush roll speed, and suction power levels can be set based on the floor type detected during the wet cleaning process.

[0188] If the floor type is determined to be a hard floor (step 358), the flow rate, brush roll speed, and suction power are set via control of the pump 44, brush motor 64, and vacuum motor 54 to hard surface levels (step 360). For example, the device 10 can operate in a hard floor wet mode according to the operating parameters of Table 1 or Table 2, and others are disclosed herein.

[0189] If the floor type is determined to be a soft floor (step 362), the flow rate, brush roll speed, and suction power are set via control of the pump 44, brush motor 64, and vacuum motor 54 to soft surface levels (step 364). For example, the device 10 can operate in a small carpet wet mode according to the operating parameters of Table 1 or Table 2, and others are disclosed herein.

[0190] In the case of a turbine mode selection during wet cleaning of either floor type (step 366), for example by pressing the turbine button 288, the brush roll speed and / or suction power are increased (step 368), and the flow rate can be increased, remain the same, or can be decreased to conserve energy. For example, the device 10 can operate in a turbine dry mode according to the operating parameters of Table 1 or Table 2, and others are disclosed herein.

[0191] The turbo button 288 can operate a momentary switch that is only closed when the user presses the button 288. Thus, upon release of the turbo button 288, the operating parameters can automatically revert to the standard levels for the dry or wet mode.

[0192] Referring Figure 16 In one aspect of the disclosure, the device 10 can be configured to shut off cleaning fluid dispensing on a backward stroke of the device 10, which can minimize streaking on the floor surface. In a typical use operation, a user stands behind the device 10 and maneuvers the device 10 back and forth over the surface to be cleaned. Thus, the direction of travel of the device 10 changes. For example, on a forward stroke, the user exerts a pushing force on the device 10 to cause the device to move in a forward direction over the surface being cleaned. On a backward stroke, the user exerts a pulling force on the device 10 to cause the device to move in a backward direction over the surface to be cleaned.

[0193] In one embodiment, the device 10 has a direction sensor 328 that determines the direction of travel of the device 10, e.g., whether the device 10 is moving in a forward stroke or a backward stroke. The main controller 72 receives input from the direction sensor 328 and can control the pump 44 based on such input. For example, the controller 72 can deactivate the pump 44 on a backward stroke of the device 10 and can activate the pump 44 on a forward stroke of the device 10. When activated, the pump 44 can operate at the flow rate of the currently selected cleaning mode, e.g., at the hard floor speed in the hard floor mode and at the soft floor speed in the small carpet mode. The controller 72 can receive the direction sensor input continuously or periodically and can turn the pump 44 on / off as the direction changes accordingly. The direction sensor 328 can include, but is not limited to, an accelerometer or a wheel rotation sensor.

[0194] Figure 21 FIG. 17 is a cross-sectional view showing the device 10 docked on the tray 70. The tray 70 can include a tray base 370 and a guide wall 372 extending upwardly from the tray base 370 that helps align the base 14 within the tray 70. The rear portion of the tray 70 can include a support shelf 376 that extends upwardly and is configured to help align the base 14 within the tray 70 and prevent the floor cleaner 10 from tilting backward. For example, the joint assembly 96 and the support shelf 376 can have complementary shapes, with the rear side of the joint fitting against the support shelf 376.

[0195] In some embodiments, tray 70 may function as a cleaning tray during self-cleaning mode. Self-cleaning using tray 70 can save the user considerable time and may result in more frequent use of the floor cleaner 10. Tray 70 may have a recessed portion in the form of a reservoir 378 aligned with at least one of the brush chamber 62 and brush roller 46. Optionally, reservoir 378 may create a closed loop between the fluid delivery and recovery systems of the floor cleaner 10 to flush a portion of the recovery path, including conduit 94, between the suction inlet port 60 and the recovery tank 22 during self-cleaning.

[0196] Figures 22-25 A recycling tank 22A with a lid 252A according to another aspect of this disclosure is shown. The recycling tank 22A may have a tank container 210A, a baffle 58A, a motor filter 256A, and a pre-filter 260A, as previously described (see [link]). Figures 13-1 5). The lid 252A is sized to be received on the tank container 210A and to at least partially close the open top of the tank container 210A.

[0197] The can lid 252A may include a support structure 380 that holds the baffle 58A, and may also support one or both of the motor filter 256A and the pre-filter 260A. The support structure 380 defines the access of the recovery tank 22A to a downstream suction source 54. Figure 2 Air outlet 254A. In one embodiment, the support structure 380 is a single injection-molded part designed to lack inaccessible cavities that would retain water and / or debris.

[0198] Cover 252A may include a sealed recycling tank 22A and a frame 18 ( Figure 5 Gasket 382 at the interface between the tank 22A, frame 18, and pre-filter 260A. In one embodiment, gasket 382 compresses the tank 22A, frame 18, and pre-filter 260A together to seal for air and water leakage at their interface. Gasket 382 supports support structure 380 within the tank container 210A.

[0199] The lid 252A may include an integrated coarse filter 384 configured to filter large debris and hair from the tank 22A during emptying and before the lid 252A is removed from the tank container 210A. For example, as Figure 25 As shown, filter 384 retains large debris and hair within tank 22A while emptying liquid and smaller debris from tank container 210A. Optionally, motor filter 256A can be removed from lid 252A before filtering the contents of tank 22. After filtering the contents of tank 22, lid 252A can be removed from container 210A, and any remaining debris can be emptied from container 210A.

[0200] In one implementation, the coarse filter 384 is integral with the support structure 380 and can include, for example, a plurality of drain holes 388 in the sidewall 386 of the support structure 380. The drain holes 388 shown herein are rectangular openings or apertures through the sidewall surface 386. Other implementations of the drain holes 388 are possible, including circular or other non-circular openings or apertures. Still further, other implementations of the coarse filter 384 can have a mesh or screen on the lid 252A defining the drain holes 388. In one non-limiting example, the drain holes 388 can have a maximum dimension (e.g., height, width, or diameter) of about 0.5 mm to 6 mm.

[0201] To make pouring easier, the drain holes 388 can be grouped at the corners of the tank 22, with the corners of the tank 22 acting as spouts or funnels to direct liquid downward toward the drain holes 388. To make pouring easier for both right- and left-handed users, a set of drain holes 388 can be provided at multiple corners of the tank 22.

[0202] Figure 22 The lid 252A is shown in a closed or sealed position, and Figure 23 The lid 252A is shown in an open or filtering position. In the closed / sealed position, the lid 252A is inserted into the container 210A and the coarse filter 384 is covered. The gasket 382 can help retain the lid 252A in the closed / sealed position via friction with the tank container 210. Thus, the tank 22 is ready for installation on the device 10. In the open / filtering position, the lid 252A is partially extended from the container 210A to expose the coarse filter 384. Preferably, the lid 252A remains at least partially retained on the tank container 210A in this position. The lid 252A can have a tab 392 that retains or holds the lid 252A in the open / filtering position, but still allows the lid 252A to be separated from the tank container 210A after filtering to empty any remaining debris.

[0203] To the extent not already described, the different features and structures of the various embodiments of the application can be used in combination with each other, as desired. The fact that an apparatus is described herein as having all of the features of a particular embodiment does not mean that all of those features are required in all applications, but is merely meant to provide a description of that embodiment. Therefore, features of the different embodiments can be mixed and matched to provide new embodiments, as desired. Not all of the features of the different embodiments are necessarily combined in a single embodiment.

[0204] Further, while the device 10 shown herein has an upright configuration, the surface cleaning device can be configured as a canister type surface cleaning device or a hand-carried type surface cleaning device. Still further, the surface cleaning device can additionally have steam delivery capability. Thus, various features of the different embodiments can be mixed and matched as desired in various vacuum cleaner configurations to form new embodiments, whether or not the new embodiments are expressly described.

[0205] The terms "comprise" or "comprising" are used herein in their broadest sense to mean and encompass the notions of "include," "include but not limited to," "have," "have since" and "consist of." The use of "for example," "for instance," "such as," and "including" to list illustrative examples does not limit to only the listed examples. Thus, "for example" or "such as" means "for example but not limitations" or "such as but not limitations," and encompasses other similar or equivalent examples.

[0206] The above description relates to specific and general embodiments of the present disclosure. Various changes and modifications can be made therein without departing from the spirit and wider aspects of the disclosure as defined by the appended claims, which are to be interpreted in the light of patent law principles including the doctrine of equivalents. As such, the present disclosure is presented by way of illustration only and should not be construed as a limitation upon the scope of the disclosure or the appended claims. Any reference to singular herein, such as the use of the articles "a," "an," "the," or "said," should not be construed as limiting the component to a single instance of the component.

[0207] Also, it should be understood that the appended claims are not limited to the expressions and specific compounds, compositions or methods described in the detailed description, which can vary between specific embodiments falling within the scope of the appended claims. With respect to any Markush groups relied upon herein for describing various embodiments, it is intended that individual members of the Markush groups can be present one at a time, two or more at a time, or in multiple copies, and that the members of the Markush groups can be present combined in any combination. With respect to any Markush group disclosed herein, it is intended that the members of the Markush group can be present one at a time, two or more at a time, or in multiple copies, and that the members of the Markush group can be present combined in any combination.

Claims

1. A surface cleaning device, comprising: An upright body, including a handle and a frame; The base is operatively connected to the upright body; Agitator, disposed together with the base; A fluid delivery system, comprising: A supply tank, removable from the frame, the supply tank being adapted to maintain a supply of cleaning fluid; and A fluid distributor, disposed together with the base, is in fluid communication with the supply tank; and A recycling system, comprising: Recycling path; The recycling tank can be removed from the frame and form part of the recycling path; Suction source; and A suction inlet port is disposed together with the base and in fluid communication with the suction source, wherein the suction inlet port is configured to simultaneously suck in fluid and debris through the recovery path; The recovery tank includes a vertical pipe and baffles, the baffles guiding fluid and / or debris from the working airflow to the sides and / or bottom of the recovery tank. The recycling tank includes a container and a removable lid, wherein the lid at least partially closes the top of the opening of the container; The recycling tank includes a coarse filter, and the coarse filter is integrated with the cover; and The coarse filter is configured to filter out large debris from the recovery tank during emptying and before the cover is removed from the tank container. The coarse filter retains the large debris in the tank container while emptying the liquid and smaller debris from the tank container.

2. The surface cleaning apparatus of claim 1 wherein, The baffle is attached to the cover and can be removed together with the cover.

3. The surface cleaning equipment according to claim 1, wherein, The baffle includes a baffle wall having a curved lower surface spaced apart above the upper end of the vertical pipe, the upper end of the vertical pipe including a vertical pipe outlet opening that is in fluid communication with a tank inlet at the bottom of the recycling tank.

4. The surface cleaning equipment according to claim 1, wherein, The baffle includes a front edge and a rear edge, wherein the front edge is positioned further away from the vertical pipe than the rear edge.

5. The surface cleaning equipment according to claim 4, wherein, The baffle includes a deflector surface having a sharper forward curve near the front edge and a gentler rearward curve near the rear edge.

6. The surface cleaning equipment according to claim 3, wherein, The baffle is offset relative to the opening of the vertical tube.

7. The surface cleaning equipment according to claim 1, wherein, The baffle is spaced apart from the inner surface of the recycling tank, and this space creates at least one flow gap between the baffle and the recycling tank.

8. A surface cleaning device, comprising: An upright body, including a handle and a frame; A base operatively connected to the upright body, the upright body having an inclined use position in which the upright body pivots rearward relative to the base; Agitator, disposed together with the base; A fluid delivery system, comprising: A supply tank, removable from the frame, the supply tank being adapted to maintain a supply of cleaning fluid; and A fluid distributor, disposed together with the base, is in fluid communication with the supply tank; and A recycling system, comprising: Recycling path; A recycling canister, removable from the frame and forming part of the recycling path, wherein the recycling canister is tilted backward in the tilted use position of the upright body; Suction source; and A suction inlet port is disposed together with the base and in fluid communication with the suction source, wherein the suction inlet port is configured to simultaneously suck in fluid and debris through the recovery path; The recovery tank includes a vertical pipe and baffles, the baffles guiding fluid and / or debris from the working airflow to the sides and / or bottom of the recovery tank. The recovery tank includes a pre-filter downstream of the fluid at the baffle and a motor filter downstream of the fluid at the pre-filter. The baffle includes a front edge and a rear edge, wherein the front edge is positioned further away from the vertical pipe than the rear edge, and The baffle includes a deflector surface having a sharper forward-curving portion near the front edge and a gentler rearward-curving portion near the rear edge.

9. The surface cleaning equipment according to claim 8, wherein, The fluid distributor includes a jet manifold with an inlet and a supply chamber to supply clean fluid to multiple outlets, wherein the cross-section of the supply chamber decreases in the direction away from the inlet to compress the clean fluid flowing therein and increase the flow rate, thereby providing a substantially uniform flow rate from the multiple outlets.

10. The surface cleaning apparatus of claim 1, further comprising a rechargeable battery that selectively powers the suction source, wherein, The rechargeable battery is disposed within the frame and also satisfies at least one of the following: Located above the supply tank; Located above the recycling tank; Located behind the recycling tank; Located behind the handle axis of the handle; and It is located on the rear side of the frame.

11. The surface cleaning device according to claim 10, comprising a battery housing disposed on the frame, wherein, The rechargeable battery can be selectively removed from the battery housing, which is positioned above the supply tank and isolates the rechargeable battery from the fluid delivery path of the fluid delivery system.

12. The surface cleaning device according to claim 10, wherein, The supply tank satisfies at least one of the following: Located below the rechargeable battery; Located behind the recycling tank; Located behind the handle axis of the handle; and It is located on the rear side of the frame.

13. The surface cleaning apparatus according to claim 1, comprising a supply tank receiver disposed on the frame, wherein an opening leading to the supply tank receiver is provided in the rear side of the frame, wherein, The supply canister can be selectively removed from the supply canister receiver, and wherein at least one surface of the supply canister forms part of the rear side of the frame when mounted in the supply canister receiver.

14. The surface cleaning device according to claim 1, wherein, The base includes a brush roller cover defining a lower side adjacent to the agitator, the brush roller cover defining a brush chamber forming part of the recycling path, wherein the suction inlet port is in fluid communication with the brush chamber.

15. The surface cleaning apparatus of claim 1, further comprising a movable joint assembly for mounting the base to the upright body, wherein, The upright body is pivotable between an upright storage position and an inclined use position via the connector assembly, wherein the retrieval path includes a suction conduit leading from the base to the upright body, and wherein the suction conduit is disposed outside the movable connector assembly, and wherein the suction conduit is disposed in front of the movable connector assembly.

16. The surface cleaning apparatus of claim 1, comprising a floor type sensor and a controller, the controller being operable to adjust at least one of a fluid distribution flow rate, a brush roller speed, and a suction power level based on data from the floor type sensor.

17. The surface cleaning device according to claim 8, wherein, The baffle includes a baffle wall having a curved lower surface spaced apart above the upper end of the vertical pipe, the upper end of the vertical pipe including a vertical pipe outlet opening that is in fluid communication with a tank inlet at the bottom of the recycling tank.

18. The surface cleaning apparatus according to claim 17, wherein, The baffle is offset relative to the opening of the vertical tube.

19. The surface cleaning device according to claim 8, wherein, The baffle is spaced apart from the inner surface of the recycling tank, and this space creates at least one flow gap between the baffle and the recycling tank.

Images