Surface cleaning device with filter

Abstract

A surface cleaning apparatus includes a recovery tank including a tank lid defining an air outlet through which a working airflow exits the recovery tank, and a filter positioned downstream of the air outlet. A filter mount supports the filter and is configured to automatically move the filter to expose an upstream side of the filter for viewing when the recovery tank is detached from the apparatus. Methods of user detachment and maintenance of a surface cleaning apparatus with a recovery tank and filter are also provided.

Description

Technical Field

[0001] This invention relates to a surface cleaning device, and more specifically, to a surface cleaning device with a filter. Background Technology

[0002] Surface cleaning equipment includes wet / dry vacuum cleaners or multi-surface cleaners, which can be used to clean hard floor surfaces such as tile and hardwood floors, as well as soft floor surfaces such as spot cleaning of carpets and rugs. Some multi-surface cleaners include a fluid delivery system that delivers cleaning fluid (usually a liquid) to the 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 the cleaning fluid, a dispenser for applying the liquid to the surface to be cleaned, and a delivery conduit for conveying the liquid from the supply tank to the dispenser. An agitator may be included to agitate the liquid on the surface. The recovery system typically includes a recovery tank, a 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 drawing the liquid through the nozzle and into the recovery tank.

[0003] Some multi-surface cleaners perform well with wet cleaning but sacrifice or even completely eliminate dry vacuuming. Providing a single cleaning device that can effectively perform both wet cleaning and dry vacuuming on hard and soft floors presents unique challenges in terms of fluid distribution, surface agitation, and the separation of collected liquid and debris.

[0004] Collecting both liquids and debris requires regular maintenance of multi-surface cleaners. Currently, the cleaning experience is often both cumbersome and time-consuming. Filters are typically located in the recovery path between the recovery tank and the suction source inlet. Improper filter maintenance can obstruct airflow through the recovery path and may lead to performance degradation. Meeting the proper maintenance requirements for existing multi-surface wet / dry vacuum cleaner designs has proven challenging. Summary of the Invention

[0005] This article provides a surface cleaning device with an improved filter mounting structure.

[0006] According to one aspect of this disclosure, a surface cleaning device includes: a housing having an inlet port; a suction source located within the housing, the suction source being configured to generate a working airflow through a recovery passage including the inlet port; a recovery tank removably mounted on the housing and forming part of the recovery passage, the recovery tank including a tank container having an opening at its upper end; and a tank lid closing the opening at its upper end, the tank lid including a recess and an air outlet through which the working airflow exits the recovery tank; a filter located downstream of the air outlet fluid, the filter including an upstream side and a downstream side through which the working airflow passes sequentially; and a filter mounting base coupled to the tank lid and the recovery tank. In one of the housings, the filter mount is configured to support the filter and has: a nested position in which the filter mount is at least partially received within the recess of the can lid and the upstream side of the filter faces the bottom of the recess; and an exposed position in which the filter mount is at least partially located outside the recess and the upstream side of the filter is visible (e.g., from a user's view and / or from above the recycling can), wherein the filter mount is configured to automatically move from the nested position to the exposed position in response to removing the recycling can from the housing, thereby allowing the user to visually inspect the upstream side of the filter to determine the degree of soiling of the filter (e.g., without removing the filter from the filter mount).

[0007] According to another aspect of this disclosure, a surface cleaning device includes: an upright body including a handle and a frame; a cleaning base operatively coupled to the upright body; an agitator on the cleaning base; a supply tank adapted to hold cleaning fluid; a fluid distributor on the cleaning base in fluid communication with the supply tank; a recovery passage; a suction source configured to generate a working airflow through the recovery passage; a suction port disposed together with the cleaning base and in fluid communication with the suction source; a recovery tank removably mounted on the frame and forming part of the recovery passage, the recovery tank including a tank container having an opening at its upper end; and a can lid closing the opening at its upper end, the can lid including a recess and an air outlet through which the working airflow exits the recovery passage. A collection tank; a filter located downstream of the air outlet fluid, the filter including an upstream side and a downstream side through which the working airflow passes sequentially; and a filter mount coupled to one of the tank cover and the frame, the filter mount being configured to support the filter and having: a nested position in which the upstream side of the filter faces the air outlet and is hidden and not visible; and an exposed position in which the upstream side of the filter is visible (e.g., from a user's view and / or from above the collection tank), wherein the filter mount is configured to automatically move from the nested position to the exposed position in response to removing the collection tank from the frame, thereby allowing the user to visually inspect the upstream side of the filter to determine the degree of dirtiness of the filter (e.g., without removing the filter from the filter mount).

[0008] According to another aspect of this disclosure, a method for maintaining a surface cleaning device with a filter is provided herein.

[0009] These and other features and advantages of this disclosure will become apparent from the following description of specific embodiments when viewed in conjunction with the accompanying drawings and claims.

[0010] Before explaining the embodiments of the present invention in detail, it should be understood that the present invention is not limited to the operational details or the details of the construction and arrangement of components set forth in the following description or shown in the accompanying drawings. The present invention may be practiced or implemented in various other embodiments and may be practiced or implemented in alternative ways not expressly disclosed herein. Furthermore, it should be understood that the terms and terminology used herein are for descriptive purposes and should not be considered limiting. The use of “comprising” and “including” and variations thereof means to cover items listed below and their equivalents as well as additional items and their equivalents. In addition, enumeration may be used in the description of various embodiments. Unless expressly stated otherwise, the use of enumeration should not be construed as limiting the present invention to any particular order or number of components. The use of enumeration should also not be construed as excluding any additional steps or components that may be combined with or incorporated into the enumerated steps or components from the scope of the present invention. Any reference to a claim element as “at least one of X, Y, and Z” is intended to include any one of X, Y, or Z alone, and any combination of X, Y, and Z, such as X, Y, Z; X, Y; X, Z; and Y, Z. Attached Figure Description

[0011] Figure 1 This is a perspective view of a surface cleaning apparatus with a filter according to one aspect of this disclosure, showing the apparatus in an upright or stored position; Figure 2 This is a schematic diagram of the various functional systems of the device; Figure 3 It is along Figure 1 The cross-sectional view of the device, taken by line III-III, shows the device in an inclined or used position; Figure 4 It is along Figure 1 A close-up cross-sectional view of the base taken along centerline III-III; Figure 5 The rear perspective view shows the supply tank and recovery tank separated from the upright body of the equipment, with the filter of the recovery tank moved to an exposed position by a filter ejection mechanism; Figure 6 This is a partial exploded perspective view of the recycling tank of the device; Figure 7 This is a side cross-sectional view of the recycling tank; Figure 8 This is a front cross-sectional view of the recycling tank; Figure 9 This is a perspective view of the device, showing a user unlocking the recycling tank from the tank receiver; Figure 10This is a perspective view of the device, showing a user unlocking and removing the recycling tank from the tank receiver, and the filter automatically starting to pop out of the recycling tank; Figure 11 This is a perspective view showing a user placing a recycling can on a surface with the filter in an exposed position; Figure 12 This is a perspective view showing the removal of the filter from the recycling tank; Figure 13 This is a partial exploded perspective view of a portion of a recycling tank according to another aspect of this disclosure; Figure 14 This is a partially exploded perspective view of a recycling tank according to another aspect of this disclosure; Figure 15 yes Figure 14 A perspective view of the recycling tank, showing the filter moved to the exposed position; Figure 16 This is a perspective view of the recycling tank according to another aspect of this disclosure, showing the recycling tank being removed and the recycling filter in a nested position; Figure 17 yes Figure 16 A perspective view of the recycling tank, showing the filter being removed from the tank via a filter ejection mechanism; Figure 18 yes Figure 16 A perspective view of the recycling tank, showing the filter being flipped over by a filter ejection mechanism to reveal the upstream side of the filter; Figure 19 yes Figure 16 A perspective view of the recycling tank, showing the removal of the filter from the recycling tank; Figure 20 This is a perspective view of a surface cleaning apparatus according to another aspect of this disclosure, showing the removal of the recycling tank from the apparatus; and Figure 21 This is a surface cleaning apparatus according to yet another aspect of the present disclosure, showing the recovery tank and filter in a dry position. Detailed Implementation

[0012] This invention generally relates to a surface cleaning device with a maintainable filter, and can take the form of a wet / dry vacuum cleaner or a wet / dry multi-surface cleaner, which can be used to clean hard floor surfaces such as tile and hardwood floors, as well as soft floor surfaces such as partial carpets and rugs. Aspects of this disclosure also relate to a pop-up filter that automatically presents the upstream or “dirty” side of the filter to the user when the collection can is removed from the operating position on the device. At least some embodiments of the surface cleaning device provided herein function through their various elements (described below) to facilitate the cleaning process by providing a mechanism that automatically exposes the downstream side of the filter in response to the removal of the collection can from the device. At least some embodiments of the surface cleaning device provided herein function through their various elements (described below) to provide improved maintainability for the filter. While primarily discussed in the context of multi-surface wet / dry cleaners, it should be understood that pop-up filters can be applied to other floor care products, including but not limited to any floor care product having a removable container for collecting dirt and / or liquids. Therefore, certain features of the surface cleaning device may be considered functional, but can also be implemented in different aesthetic configurations.

[0013] As used herein, the term "upstream" refers to the direction or location of the air inlet of the recovery system closer to the surface device, and the term "downstream" refers to the direction or location of the air outlet of the recovery system closer to the surface cleaning device. In operation, the working airflow flows sequentially through the upstream component of the recovery system, then gradually through the downstream components, and finally exits into the ambient atmosphere through the air outlet of the surface cleaning device.

[0014] As used herein, the term "user disassembly" and variations thereof refer to the intentional disassembly of a surface cleaning device by an end user without the use of destructive force, including the disassembly or removal of various components with or without the use of common household tools. Unless otherwise stated, user disassembly of components from a surface cleaning device includes the reassembly of such components back into the surface cleaning device.

[0015] Unless otherwise stated, the term “debris” as used herein includes dirt, soil, dust, hair, stains and other debris.

[0016] The functional system of surface cleaning equipment can be arranged in any desired configuration, such as upright devices with a base and an upright body for guiding the base to move on the surface to be cleaned, portable devices suitable for handheld use, canister devices with a cleaning tool connected to a wheeled base via a vacuum hose, autonomous or robotic devices with an autonomous drive system and an autonomously moving housing, and commercial devices. Any of the above-described cleaners may be adapted to include a flexible vacuum hose that can form part of a conduit between the nozzle and the suction source. As used herein, the terms "wet and dry vacuum cleaner" or "wet and dry multi-surface cleaner" include vacuum cleaners that can be used to clean hard floor surfaces such as tile and hardwood floors, as well as soft floor surfaces such as carpet.

[0017] Figures 1 to 2 A surface cleaning apparatus 10 with a filter according to one aspect of this disclosure is shown. The apparatus 10 and the filter are provided with various features and improvements, which will be described in more detail below. The apparatus 10 may include at least one cleaning system, such as a fluid delivery system or a recovery system. When both a fluid delivery system and a recovery system are present, the apparatus 10 can deliver cleaning fluid to the surface to be cleaned and can recover liquid and debris from the surface to be cleaned.

[0018] As shown herein, device 10 may be an upright multi-surface wet / dry vacuum cleaner with a housing comprising an upright handle assembly or body 12 and a floor cleaning nozzle or base 14, the cleaning nozzle or base comprising cleaning feet or bases mounted to or connected to the upright body 12 and adapted to move on the surface to be cleaned. Various cleaning systems and their components may be supported by one or both of the base 14 and the upright body 12. It is worth noting that although the base 14 is referred to herein as a “floor” cleaning base, according to at least some aspects of this disclosure, the base 14 can be used to clean non-floor surfaces, such as upholstery and furniture.

[0019] For the purposes of description in relation to the accompanying drawings, the terms "upper," "lower," "right," "left," "vertical," "horizontal," "inner," "outer," and their derivatives should be used as follows: Figure 1 In this disclosure, the cleaning base is positioned on the surface to be cleaned, and from the perspective of a user at the rear of the device 10, this defines the rear portion of the device 10. As used herein, the terms “front” and “rear” and their derivatives are used relative to the direction in which the user pushes the cleaning base on the surface to be cleaned (i.e., from back to front). However, it should be understood that this disclosure may take various alternative orientations unless the opposite is explicitly indicated.

[0020] The upright body 12 may include a handle 16 and a frame 18. The frame 18 may include a main support section that at least partially supports a source of cleaning fluid, such as a supply tank 20 and a recovery tank 22, and may also support additional components of the body 12, including but not limited to a battery 66. The device 10 may include a fluid delivery or supply path (including and at least partially defined by the supply tank 20) ​​for storing cleaning fluid (e.g., cleaning liquid) and delivering the cleaning fluid to the 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 it is emptied by the user.

[0021] The handle 16 may include a handle tube 26 having a handle grip 28 at its upper end. The handle tube 26 may extend upward from the frame 18 and may be elongated to define a longitudinal handle axis 24. Various configurations for the handle grip 28 are possible, including a ring grip as shown, or a non-ring, rod-shaped grip.

[0022] Device 10 may include at least one user interface (“UI”) through which a user interacts with device 10 to perform one or more functions. Among other functions, the UI may also accept user input to control the cleaning system and / or act as a communication output device for the cleaning system. To accept user input, the UI may have at least one user input control operatively connected to one or more components or systems of device 10 to influence and control its operation. Non-limiting examples of input controls include buttons, triggers, toggle switches, keypads, switches, etc., or any combination thereof. To communicate output to the user, the UI may have at least one status indicator or a status display including multiple status indicators to communicate the status or condition of device 10 (including its systems and components) to the user. 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 may also include audio output components, such as speakers.

[0023] In some implementations, device 10 may include a first UI 30 and a second UI 32. In a non-limiting example, the first UI 30 may be an input UI configured to accept user input to control device 10 (including its systems or components), and the second UI 32 may be an output UI configured to indicate status information related to device 10 (including its systems or components).

[0024] Figure 2This is a schematic diagram of the various functional systems of the device 10. The delivery system includes a supply tank 20 configured to hold cleaning fluid, at least one fluid distributor 38 supplying cleaning fluid from the supply tank 20, and a fluid supply path 40 from the supply tank 20 to the fluid distributor 38.

[0025] Supply tank 20 may store liquid cleaning fluid. The cleaning fluid may include any one or more of any suitable cleaning fluid, including but not limited to water, compositions, concentrated cleaning agents, diluted cleaning agents, other surface cleaning and / or treatment agents, and mixtures thereof. For example, the cleaning fluid may include water. In another example, the cleaning fluid may include a mixture of water and concentrated cleaning agent.

[0026] It is worth noting that while the device 10 described herein is configured to deliver cleaning liquids, some aspects of this disclosure may be applicable to surface cleaning devices that deliver steam. Therefore, unless otherwise stated, the term "cleaning fluid" may encompass liquids, steam, or both.

[0027] The delivery system may include a flow controller for controlling the flow rate of fluid from the supply tank 20 to the fluid distributor 38. In one configuration, the flow controller may include a pump 44 that pressurizes the supply path 40 and controls the delivery of clean fluid to the fluid distributor 38. In one example, pump 44 may be a centrifugal pump. In another example, pump 44 may be a single-speed, dual-speed, or variable-speed electromagnetic pump.

[0028] The release of cleaning fluid from dispenser 38 can be manually controlled by the user or automatically controlled by selecting a cleaning mode. As will be described in further detail below, in some embodiments, the operation of pump 44 can be mode-dependent, enabling automatic control of the release of cleaning fluid from dispenser 38. In other words, pump 44 can be activated or deactivated depending on the selected cleaning mode of device 10.

[0029] In another supply path configuration, pump 44 can be omitted, and the flow control system can include a gravity supply system having a valve fluidly connected to the outlet of supply tank 20, so that when the valve is open, the cleaning fluid will flow to distributor 38 under gravity.

[0030] Distributor 38 may include various configurations, such as nozzles, spray nozzles, or manifolds, and may include at least one fluid outlet for distributing cleaning fluid to the surface to be cleaned. Distributor 38 may be positioned to deliver cleaning fluid directly to the surface to be cleaned, or indirectly by delivering cleaning fluid to an agitator (such as, but not limited to, at least one brush roller 46). In a non-limiting example, distributor 38 delivers cleaning fluid to a horizontally rotating brush roller 46.

[0031] The delivery system may include other conduits, pipes, pipelines, hoses, connectors, valves, etc., that fluidly connect the components of the delivery system together and provide a supply path 40.

[0032] Optionally, a heater 48 may be provided to heat the cleaning fluid before it is delivered to the surface to be cleaned. In one example, an inline heater 48 may be located downstream of the supply tank 20 and upstream or downstream of the pump 44. Other types of heaters may also be used. In yet another example, exhaust gas from the motor-cooled air path of the suction source used for the recovery system may be used to heat the cleaning fluid. In yet another example, the cleaning fluid is unheated.

[0033] exist Figure 2 In the illustrated embodiment, the delivery system includes a single supply tank 20 for storing a cleaning fluid. In another embodiment, the delivery system may have an additional supply container (not shown) for storing a different cleaning fluid. For example, supply tank 20 may store water, and the second supply container may store a cleaning agent, such as detergent. In embodiments with multiple supply containers, the device 10 may have a mixing system for controlling the composition of the cleaning fluid delivered to the surface.

[0034] The recovery system may include a recovery passage 50 through the device 10, the recovery passage having a channel inlet 52 and a channel outlet (not shown); a suction source 54 including a vacuum motor 56 in fluid communication with the channel inlet and configured to generate a working airflow through the recovery passage 50; and a recovery tank 22 for separating and collecting liquid and debris from the working airflow for subsequent disposal. A separator 58 may be formed in a portion of the recovery tank 22 for separating liquid and entrained debris from the working airflow.

[0035] The recovery tank 22 may include at least one filter 116 for separating debris from the working airflow. In operation, the working airflow (including or containing working air) passes through the filter 116 and reaches the suction source 54. The filter 116 is maintainable, and according to various aspects of this disclosure described in more detail below, the device 10 may include a filter ejection mechanism configured to "pop" the filter 116 when the recovery tank 22 is removed from the device 10, thereby exposing the upstream or dirty side of the filter to the user.

[0036] In one embodiment, the path inlet 52 is disposed on the base 14 and can be defined by an inlet port 60 and / or a brush chamber 62 disposed on the cleaning head or the base 14. One or both of the inlet port 60 and the brush chamber 62 may be formed at least partially by an inlet nozzle, a brush cap, or a combination thereof.

[0037] The device 10 may include at least one agitator for agitating the surface to be cleaned. In one embodiment, the agitator is a rotating brush roller 46. In a non-limiting example, the suction port 60 is positioned close to the brush roller 46 to collect liquid and debris directly from the brush roller 46. Other examples of agitators include, but are not limited to, dual horizontal rotating brush rollers, one or more vertical rotating brushes, stationary brushes, or cleaning pads.

[0038] A drive assembly, including a brush roller motor 64, can drive the brush roller 46. A drive transmission (not shown) operatively connects the motor 64 to the brush roller 46 to transmit rotational motion of the motor 64 to the brush roller 46. In other embodiments, the drive transmission can operatively connect the brush roller 46 to a vacuum motor 56 to transmit rotational motion of the motor 56 to the brush roller 46.

[0039] Electrical components of device 10 (including pump 44, vacuum motor 56, brush roller motor 64, or any combination thereof) are electrically connected to a power source, which may include a battery 66 for wireless operation, preferably a rechargeable battery. In one example, the rechargeable battery 66 is a lithium-ion battery. The rechargeable battery can be charged in situ on device 10 or can be removed from device 10 for charging. In another exemplary configuration, battery 66 may comprise a user-replaceable battery. In another embodiment, the power source may include a power cord adapted for wired operation when plugged into a household power outlet.

[0040] The tray (not shown) can hold the device 10 and recharge the battery 66. The tray can be configured to mate the base 14 of the floor cleaner 10 with the upright body 12 in a generally upright storage position. The tray can also be configured for other functions, such as self-cleaning the device 10.

[0041] Device 10 may include a central controller 72 operatively coupled to various systems and components of device 10. In one embodiment, the central controller 72 may include a printed circuit board (“PCB”). Unless otherwise stated, the term “PCB” as used herein includes a printed circuit board having a plurality of electrical and electronic components that provide operational control for device 10. For example, the PCB includes a processing unit (e.g., a microprocessor, microcontroller, or other suitable programmable device) and a memory (e.g., a read-only memory (“ROM”), random access memory (“RAM”), electrically erasable programmable read-only memory (“EEPROM”), flash memory, or other suitable magnetic, optical, physical, or electronic storage device). The processing unit is coupled to the memory and executes instructions (e.g., software) that can be stored in RAM (e.g., during execution), ROM (e.g., typically permanently), or other non-transitory computer-readable media (such as another memory or disk). Furthermore, the memory may also be included within the processing unit (e.g., as part of a microcontroller). 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 (among other things) instructions related to the control processes and methods described herein from memory. Among other things, the PCB may also include a variety of additional passive and active components, such as resistors, capacitors, inductors, integrated circuits, and amplifiers. These components are arranged and connected to form the PCB to provide a variety of electrical functions, including signal conditioning or voltage regulation, etc. For descriptive purposes, the PCB and the electrical components integrated on the PCB are collectively referred to as a controller. Therefore, the central PCB and the electrical components integrated on the central PCB may be referred to as a central controller 72.

[0042] Alternatively, a base controller 74 (referred to herein as a base PCB) can operatively connect the central controller 72 to electrical components (such as the pump 44 and brush roller motor 64) within the base 14 of the device 10. In other embodiments, the device 10 does not include a separate base PCB.

[0043] In one aspect of this disclosure, device 10 may have multiple user-selectable cleaning modes, such as at least one wet cleaning mode, at least one dry cleaning mode, and a self-cleaning mode. These modes may be associated with operating parameters of pump 44, vacuum motor 56, and / or brush roller motor 64. In one embodiment, device 10 has multiple dry cleaning modes and multiple wet cleaning modes, which may include a dry vacuuming mode, a hard floor wet mode, a spot carpet wet mode, and at least one turbo-powered mode.

[0044] Table 1 below lists some non-limiting examples of the operating parameters for the mode. Other operating parameters for the mode and other cleaning modes are possible.

[0045] Table 1

[0046] Table 2 below lists some non-limiting examples of the mode's operational parameter values, including preferred values ​​and ranges for some parameters. Other operational parameters for the mode are possible.

[0047] Table 2

[0048] In all wet cleaning modes (e.g., user-operated or manned modes), the release of cleaning fluid can be continuous or automatic, for example, without requiring a trigger and can be controlled according to floor type. In alternative implementations, the user can manually control the release of cleaning fluid, for example, using a trigger. In unattended self-cleaning mode, the release of cleaning fluid is automatic.

[0049] Figure 3 The architectural layout of the upright body 12 is shown, including the positioning and relative positions of the components of the supply and recycling systems. The upright body 12 includes components such as a supply tank 20, a recycling tank 22, a battery 66, a vacuum motor 56, a central controller 72, and a display UI 32. The components of the upright body 12 are arranged in a balanced, user-friendly relative position, providing protection for the electronic components. For example, tanks 20 and 22 are located in the lower end of the frame 18, and the motor 56 and battery 66 are located in the upper end of the frame 18, so that these components are arranged in a generally linear stacking orientation, providing a compact space arrangement for the upright body 12 that is comfortable to hold when used at an angle. The recycling tank 22 is located on the lower forward side of the frame 18, and the supply tank 20 is located on the rearward side of the frame 18. The vacuum motor 56 is located above the recycling tank 22, generally on the forward side of the frame 18. Other arrangements of the components of the device 10 are possible while maintaining good balance and user-friendly operation and isolating the electronic components.

[0050] Figure 4 The architectural layout of the base 14 is shown. The base 14 may include a suction nozzle housing 76 having an elongated suction opening 78 on its lower side 80 leading to a brush roller chamber 62. An agitator 46 is rotatably mounted in the chamber 62 and rotates about an axis 82. The chamber 62 and / or the suction opening 78 are fluidly coupled to a suction port 60, which leads to a suction source 54. Figure 3The suction port 60 may be located behind the brush roller 46. In a non-limiting example, the suction port 60 is positioned close to the brush roller 46 to collect liquid and debris directly from the brush roller 46. Since the agitation chamber 62 opens to the surface to be cleaned via the suction opening 78, some liquid and debris can also be drawn from the surface to be cleaned. Thus, the agitation chamber 62 may form part of the recovery passage 50, with the suction port 60 opening into the chamber 62. While embodiments of the base 14 have been described herein for illustrative purposes, the base 14 and its components may have other shapes and configurations. In other embodiments, the brush roller 46 may be located outside the recovery passage, for example, for mopping a floor surface, where the suction port 60 is configured to recover liquid and debris directly from the floor surface.

[0051] At least a portion of the brush roller 46 extends through the inlet opening 78 to agitate the surface to be cleaned. For example, the brush roller 46 may include an agitating material 84 extending through the inlet opening 78. In one embodiment, the agitating material is microfiber. The microfiber may be composed of polyester, polyamide, or a composite material containing polypropylene, or any other material known in the art suitable for constituting microfiber. In another embodiment, the brush roller 46 may be a hybrid brush roller whose agitating material comprises a combination of microfiber and stiff bristles for agitation. While a single horizontally rotating brush roller 46 is shown herein, in some embodiments, multiple horizontally rotating brush rollers or one or more vertically rotating brush rollers may be provided on the device 10.

[0052] An interference-type wiper 86 is mounted at the forward portion of the brush chamber 62 and configured to engage with a portion of the brush roller 46. This interference-type wiper can scrape away any excess liquid on the brush roller 46 and / or evenly distribute or coat the cleaning fluid across the width of the brush roller before it reaches the surface to be cleaned. The wiper 86 can be rigid, i.e., stiff and inflexible, so that it will not yield or bend upon engagement with the brush roller 46. Alternatively, the wiper 86 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 86 can be flexible.

[0053] A scraper 88 is mounted behind the brush roller 46 and brush chamber 62 and configured to contact the surface as the base 14 moves over the surface to be cleaned. The scraper 88 scrapes away residual liquid from the surface, drawing it into a recovery path via the suction port 60, thus leaving a dry, clean finish without water stains on the surface. The scraper 88 can be flexible, i.e., elastic or resilient, to be able to bend easily according to the contours of the surface to be cleaned while remaining undeformed during normal use of the device 10. Optionally, the scraper 88 can be formed of an elastic polymer material such as ethylene propylene diene monomer (EPDM) rubber, polyvinyl chloride (PVC), rubber copolymers (such as nitrile rubber), or any material known in the art that has sufficient rigidity to remain substantially undeformed during normal use of the device 10.

[0054] Figure 5 This is a rear perspective view showing tanks 20, 22 disassembled from the upright body 12. Tanks 20, 22 can be mounted to the frame 18 in any configuration. In this embodiment, tanks 20, 22 can be removed from the frame 18 for filling / emptying. The upright body 12 includes tank inlets or receivers 90, 92 for receiving the supply tank 20 and the recovery tank 22, respectively. As shown herein, in one embodiment, the tank receivers 90, 92 may be partially defined by the frame 18 and may be disposed on opposite sides of the frame 18, and more specifically on the rear side 94 and front side 96 of the frame 18, respectively.

[0055] Supply can 20 is removably mounted at the rear of frame 18, such that supply can 20 passes through the rear side 94 of frame 18. Supply can receiver 90 has an access opening 98 at the rear side 94, and supply can 20 is loaded and unloaded through access opening 98. With this configuration, a user can easily load and unload supply can 20 from a typical operating position at the rear of device 10.

[0056] The recycling tank receiver 92 is typically positioned in front of the supply tank receiver 90 and may include a recycling tank support 100 (on which the tank 22 is placed) and a top plate 102 generally opposite the support 100. In one embodiment, the recycling tank receiver 92 may have an open front and lateral sides, such that when the recycling tank 22 is positioned in the receiver 92, the front side 22F and lateral side 22S of the recycling tank 22 are visible and form the outer surface of the device 10. With this configuration, a user can easily observe the contents of the tank 22 from various angles when the upright body 12 is in various tilted usage positions. In other embodiments, when the tank 22 is positioned in the receiver 92, a portion of the tank 22 is more or less visible.

[0057] Figure 6This is a partially exploded perspective view of one embodiment of the recycling tank 22. The recycling tank 22 may typically have a front side 22F, a rear side 22R, spaced lateral sides 22S, an upper end 22U, and a lower end 22L. The recycling tank 22 may include a recycling tank container 108, which forms a collection chamber 110 of the recycling system. The recycling tank 22 may include a lid 112 at the upper end 22U. The lid 112 may define a cover sized to receive on the tank container 108. The lid 112 at least partially encloses the top of the opening of the tank container 108 and may further define an air outlet 114 of the recycling tank 22 leading to a downstream suction source 54. Figure 3 ).

[0058] In one embodiment, the can 22 may have a flat portion 106 at its lower end 22L, which allows the can to be placed on a horizontal surface when it is removed from the floor cleaner 10. Because of the flat portion 106 at the lower end 22L, the can 22 can stand upright on its own, for example, with the upper end 22U positioned above the lower end 22L.

[0059] In one embodiment, the can 22 may have a handle 124 for a user to hold when removing (e.g., disassembling) or installing the can 22 from the floor cleaner. The handle 124 may be located at or near the upper end 22U and may protrude from the front side 22F. Various configurations for the handle 124 are possible, including a cup-shaped handle as shown, or a non-cup-shaped handle.

[0060] The recovery tank 22 may include at least one filter 116 for separating debris from the working airflow. In one embodiment, the filter 116 is located at the air outlet 114, and may be specifically located on the downstream side of the air outlet 114. The filter 116 is located upstream of the vacuum motor. The filter 116 includes an upstream side 118 and a downstream side 120, through which the working air flows sequentially. In operation, the working air flows sequentially from the air outlet 114 through the upstream side 118, through the downstream side 120, and reaches the suction source 54. Figure 3 ). refer to Figure 3 In a non-limiting example, outlet conduit 104 is in fluid communication with filter 116 on the downstream side 120 of filter 116 to direct working air filtered by filter 116 toward suction source 54. Outlet conduit 104 may lead to or extend through the top plate 102 of tank receiver 92.

[0061] Return to Figure 6The filter 116 can be supported by the cover 112. In one embodiment, the cover 112 includes a recess 122 on its upward-facing side, the recess being sized to receive the filter 116 in a nested position. An air outlet 114 may be disposed within and / or defined by the recess 122. For example, the air outlet 114 may include at least one opening through the bottom of the recess 122. The recess 122 may be a concave portion of the cover 112, sized to receive the filter 116 in a nested position, an example of which is shown in [example missing]. Figures 7 to 8 As shown in the image.

[0062] Filter 116 is maintainable, meaning that a user can access filter 116 by disassembling one or more parts of device 10. Filter 116 can be rinsed or cleaned and reassembled in place on device 10. Ultimately, after multiple cleanings, filter 116 can be replaced with a new filter. Alternatively, filter 116 can be discarded after single use.

[0063] According to one aspect of this disclosure, filter 116 can automatically move from a nested position within recess 122 to an exposed position, in which filter 116 is at least partially located outside recess 122. In the exposed position, the upstream side 118 of filter 116 is visible (e.g., from a user's view and / or from above the recycling tank), and the user can visually inspect the upstream side 118 to determine the degree of dirtiness of filter 116. More specifically, in the exposed position, the user can see the upstream side 118 of filter 116 from their advantageous position without moving or removing any part of filter 116 or tank 22. Because the upstream side 118 of filter 116 is the part of filter 116 that is first exposed to the working air during operation, it is more likely to trap dirt than other parts of filter 116, such as the downstream side 120. By visually inspecting the upstream side 118, the user can determine the degree of dirtiness of filter 116. For example, the user can see whether filter 116 is dirty or clogged with dirt, and whether filter 116 needs cleaning or replacement.

[0064] According to one aspect of this disclosure, the recycling tank 22 may include a filter ejection mechanism configured to "pop" the filter 116 when the recycling tank 22 is removed from the upright body 12 to expose it. Thus, when the tank 22 is removed, the filter 116 automatically pops out of the cover 112 to expose the upstream side 118, allowing the user to visually inspect the upstream side 118 to determine the degree of soiling of the filter 116. The pop-up filter 116 offers a significant advantage over other known configurations, which typically conceal the upstream side of the filter within the filter housing and expose only the downstream side, making it difficult to assess the degree of soiling. The user can immediately observe the condition of the upstream side 118 of the filter 116 without touching the filter 116 or any other soiled parts of the device 10. Another benefit is that the "pop-up" of the filter 116 can accelerate the air drying process of the tank 22, cover 112, and filter 116. Even though the cap 112 and filter 116 are still on the can 22, the position of the filter 116 relative to the other parts of the can 22 exposes more of the can 22 to air, thereby allowing air to circulate through and around the can 22 in a path that does not exist when the can 22 is assembled on the device 10.

[0065] Figure 5 An example of an exposed location is shown in the image. Figure 3 An example of a nested position is shown. Mounting the recycling tank 22 onto the frame 18 can automatically move the filter 116 to its nested position. For example, the filter 116 can be pushed into and / or held in the nested position by a portion of the frame 18. In one embodiment, the edge of the frame 18 (which defines the upper edge of the tank receiver 92 and / or the forward edge of the top plate 102) can be positioned to engage the filter 116 and push it into the nested position.

[0066] refer to Figures 5 to 6 In one embodiment, the filter mount 126 is coupled to the can lid 112 and supports the filter 116 on the can 22. The filter mount 126 is pivotally coupled to the can lid 112 via a hinge 128 and is biased toward an exposed position. In the nested position, the filter mount 126 is received within a recess 122, with the upstream side 118 of the filter 116 facing the bottom of the recess 122. The downstream side 120 of the filter 116 faces upward. In the exposed position, the filter mount 126 is at least partially outside the recess 122.

[0067] The ejection mechanism may include at least one spring 130 communicating with the filter mount 126, wherein the spring 130 applies a permanent bias to the filter mount 126 toward an exposed position. The filter mount 126 may have a first end pivotally mounted to the cap 112 via a hinge 128. The bias spring 130 is disposed between the cap 112 and the filter mount 126 and forces the filter mount 126 to swing outward from the recess 122 on the hinge 128. In the illustrated embodiment, the hinge 128 is oriented toward the rear side 22R of the can 22, causing the filter 116 to pivot upward and away from the front side 22F of the can 22. This means that the upstream side 118 of the filter 116 is toward the front side 22F of the can 22. In an alternative embodiment, the hinge 128 may be oriented toward one of the lateral sides 22S of the can 22, causing the filter 116 to pivot on a side edge.

[0068] In one embodiment, the ejection mechanism may include two springs 130 that engage with two pivot arms forming the hinge 128. Each spring 130 may apply a permanent bias toward an exposed position to one of the pivot arms. For example, the springs 130 may utilize stored kinetic energy to engagely maneuver the pivot arm into the exposed position. In another embodiment, the ejection mechanism may include only one spring or more springs that bias the filter mount 126 to the exposed position.

[0069] The filter mount 126 can be configured to allow a user to remove the filter 116 from the canister 22 without removing the filter mount 126 from the cover 112. The filter mount 126 is coupled to the cover 112, and the filter 116 is configured to slide in and out of the mount 126, or otherwise insert into and be removable from the mount 126. In one embodiment, the filter mount 126 may include a filter frame 132 with a shape complementary to the filter 116. For example, the filter 116 has a rectangular shape in a plan view, but other shapes and configurations are possible. The filter frame 132 may surround all or part of the filter 116 while allowing airflow through the filter 116.

[0070] The filter frame 132 may be provided with guide rails or other guiding devices for holding the filter 116 within the filter frame 132. For example... Figure 5As shown, when the filter mount 126 is in the exposed position, the filter 116 can be removed from and inserted into the filter frame 132 along the insertion axis D, for example, the insertion axis D can be perpendicular to the axis of rotation of the filter mount 126 about it (as defined by hinge 128). In another embodiment (not shown), the filter mount 126 may have an open side opposite the hinge 128, and the filter 116 can slide into the filter mount 126 through said open side. Other configurations of the filter mount 126 are possible.

[0071] It is worth noting that in this embodiment, the filter mounting base 126 is not configured for user removal or disassembly. Instead, the filter mounting base 126 pops out from the cover 112, making the filter 116 accessible for cleaning, maintenance, and / or replacement. The filter mounting base 126 can be attached to the cover 112 by fasteners or other fastening mechanisms, including press-fit, snap-fit, clips, etc. In another embodiment, the mounting base 126 can be removed from the cover 112 by a user.

[0072] Figure 7 It is along Figure 1 The image shows a cross-sectional view of the recovery tank 22 taken along line III-III. The filter 116 includes at least one filter medium 134. In some embodiments, the filter medium 134 may define an upstream side 118 and a downstream side 120 of the filter 116. The filter medium 134 may be any non-porous, porous, pleated, or non-pleated filter medium. Figure 7 In the illustrated embodiment, filter media 134 includes a first porous foam layer 134A, a second porous foam layer 134B located downstream of the first porous foam layer 134A, and a nonwoven layer 134C located downstream of the second porous foam layer 134B. The nonwoven layer 134C may define at least a portion of the downstream side 120 of the filter 116, and the first porous foam layer 134A may define at least a portion of the upstream side 118 of the filter 116. Layered filter media may be preferred for surface cleaning devices with dry vacuuming capabilities because it does not become clogged with dry debris as quickly as other types of filter media. In another embodiment, filter media 134 may comprise a single-layer (such as a pleated filter media made of a material that remains porous when wet) or a dual-layer filter. In another example, the filter media may be a non-porous pleated filter, such as a HEPA filter.

[0073] The filter 116 may include a filter cage 136 containing filter media 134, and the cage 136 is preferably made of a material that imparts rigidity to the filter 116. The filter cage 136 may have at least one opening on an upstream side 118 and at least one opening on a downstream side 120, allowing working air to pass through the filter media 134 retained within the cage 136. The cage 136 can be opened to access the filter media 134. In one embodiment, the cage 136 includes an openable door 138. Opening the door 138 allows the filter media 134 to be removed from the cage 136 for cleaning and / or replacement. Other housings for the filter media 134 are possible, including housings from which the filter media 134 cannot be removed.

[0074] In one embodiment, the recycling tank 22 may include a hollow riser 140. The riser 140 may be oriented such that it extends generally upward within the tank container 108 in the installation location of the tank container 22. A flow path is formed between a tank inlet 142 formed at the lower end of the riser 140 in the tank container 108 and an opening 144 at the upper end of the riser 140 located within the interior of the tank container 108. Figure 3 As shown, when the recovery tank 22 is installed onto the frame 18, the inlet 142 is aligned with the conduit 50 to establish fluid communication between the base 14 and the recovery tank 22. The riser 140 may be integrally formed with the tank container 108, or it may be separately formed and attached to it.

[0075] As described above, tank 22 may include a separator 58 configured to separate liquid and / or debris from the working gas stream entering the recovery tank 22. A filter 116 is located downstream of the separator 58 to separate finer debris from the working gas stream. In one embodiment, separator 58 may include a baffle that directs the working gas stream towards the inner tank volume near the front, rear, and sides of the tank, where the velocity of the working gas stream is reduced, causing liquid and / or debris to separate from the working gas stream and be collected in collection chamber 110 near the sides and / or bottom of tank 22. Baffle 58 may be positioned such that at least a portion of the incoming dirty fluid flow impacts baffle 58 upon exiting riser 140. This can help to change direction and reduce velocity of the dirty fluid flow relatively quickly, which can facilitate the separation of liquid and / or debris from the working gas stream. The separated liquid and debris can be collected in container 108, while the remaining portion of the incoming working gas stream can continue to filter 116. Other separators are possible and within the scope of the invention.

[0076] The filter mount 126 and baffle 58 (if present) can be engaged with the cover 112 for removal from the tank container 108 together. Thus, the filter mount 126 and baffle 58 are independent of the tank container 108 and riser 140. The cover 112 is removed to empty the container 108, thereby removing the filter 116 and baffle 58.

[0077] The recycling tank latch 146 may optionally be supported by the cover 112 to secure the recycling tank 22 within the recycling tank receiver 92 to the upright body 12. Figure 3 The latch 146 can be configured to releasably lock the recycling can 22 to the upright body 12, such that the user must actuate the latch 146 before pulling the can 22 off the frame 18. In another embodiment, the latch 146 can releasably latch or hold the can 22 on the frame 18, but not lock it, allowing the user to easily apply sufficient force to the can 22 itself to pull it off the frame 18.

[0078] The recycling tank 22 may also include a removable coarse filter 148 configured to filter out larger debris and hair from the tank container 108 before emptying it. The coarse filter 148 is configured to collect larger debris and hair while returning liquid and smaller debris to the tank container 108. For the purposes of this description, large debris is any debris with a maximum size (such as length or diameter) greater than or equal to 0.5 mm to 6 mm (preferably 3 mm), while small debris is any debris with a maximum size (such as length or diameter) smaller than the maximum size of a large debris. An example of a large debris piece includes a strand of hair longer than 3 mm. Examples of small debris include coffee grounds and breadcrumbs with a diameter less than 3 mm.

[0079] In some embodiments, the recycling tank 22 may have an electronic level sensing system 150 configured to detect liquid levels at one or more levels within the recycling tank 22 and determine when to shut down or otherwise interrupt the recycling system. Furthermore, the sensing system 150 can detect whether the recycling tank 22 is missing from the device 10. The sensing system 150 may include any suitable components for sensing the liquid level within the recycling tank 22. In another embodiment, the tank 22 may employ a float-type shut-off device instead of the electronic system 150.

[0080] In the illustrated example, the sensing system 150 includes sensors or probes 152, 154 capable of detecting liquids. Probes 152, 154 are electrically connected to power terminals 156, 158 optionally disposed on the cover 112. These power terminals, when the recycling tank 22 is mounted on the frame 18, are connected to electrical contacts (not shown) on the recycling tank receiver 92 to supply power to the probes 152, 154. The electrical contacts on the recycling tank receiver 92 are electrically connected to a power source (e.g., battery 66) of the device 10.

[0081] Probes 152 and 154 may be supported by cover 112 and, if present, may be offset relative to riser 140 and / or separator 58. When cover 112 is attached to container 108, probes 152 and 154 protrude into collection chamber 110. It is also conceivable that the sensors could be molded directly into the sidewall of container 108, thus eliminating the need for probes.

[0082] Sensor probes 152 and 154 and controller 72 ( Figure 2 The device is connected to a sensor 154. A sensor 152 can emit a liquid sensing signal, which can be detected by another sensor 154. If the signal indicates that the liquid in the recovery tank 22 has reached or exceeded a critical level, the controller 72 can shut down at least one electrical component of the device 10. Such components may include a vacuum motor 56, and optionally also a pump 44 and / or a brush roller motor 64. In another configuration, the controller 72 may additionally or alternatively activate a shut-off valve (not shown) in response to a signal to prevent liquid from entering the suction source 54.

[0083] refer to Figures 7 to 8 The working airflow path through tank 22 (which defines part of the recovery path) is roughly as follows: Working air (which may contain entrained debris and / or liquid and includes an airflow containing debris and / or liquid) enters through riser 140 and encounters baffle 58. Some debris and / or liquid may fall to the bottom of tank 22 after directly impacting baffle 58, while other debris and / or liquid may be separated due to the reduced air velocity. Liquid and small debris accumulate at the bottom of tank 22, optionally below coarse filter 148, but in some operations, the liquid level may rise above coarse filter 148. Large debris and hair are trapped above coarse filter 148. After being deflected by baffle 58, the working air flows upward toward the top of container 108 and exits from container 108 through cover 112. Fine debris is captured by filter 116. Relatively clean, filtered, and / or liquid-free air reaches suction source 54. Figure 3 ).

[0084] By removing the recovery tank 22 from the frame 18, the fluid and debris collected in the recovery tank 22 can be periodically emptied. Users can also disassemble the tank 22 for maintenance (including the filter 116). Figures 9 to 12 Steps for removing tank 22 and maintaining filter 116 according to one aspect of this disclosure are shown.

[0085] To remove can 22 from frame 18, first release latch 146, for example, by user U pressing the latch button, as shown. Figure 9 As shown. Conveniently, in one embodiment, this can be done with one hand, with the user U gripping the handle 124 with their fingers and / or hand and operating the latch 146 with their thumb.

[0086] Next, pivot can 22 about its lower end so that the upper end of can 22 is removed from can receiver 92, for example, forward away from frame 18, as... Figure 10 As shown. When the upper end of can 22 protrudes from below the top plate 102 of can receiver 92, filter 116 automatically begins to open, for example, pops out, under the action of the biasing mechanism.

[0087] Once freed from the constraint of the top plate 102 of the tank receiver 92, the filter 116 can be fully opened. For example... Figure 11 As shown, the can 22 can be completely pulled out of the receiver 92 and optionally placed on the surface in an upright, non-overflowing position by means of the flat bottom 106 at the lower end of the can 22.

[0088] With the tank 22 separated from the frame 18 and the filter 116 in the exposed position, the user can remove (e.g., disassemble) the filter 116 from the filter mount 126 along the insertion axis D, as shown. Figure 12 As shown. For example, filter 116 can slide off filter mount 126 by touching only a small area of ​​it. Can lid 112 does not need to be removed and can remain in place on can container 108. After filter 116 is removed, it can be cleaned, i.e., any debris adhering to the upstream side 118 of the filter can be wiped or rinsed off, or a new filter 116 can be replaced. Filter mount 126 can also be cleaned and / or maintained.

[0089] With the can 22 separated from the frame 18, the user can remove the lid 112 from the can container 108. This may also require removing one or more of the filters 116, separators 58, and / or probes 150, 152 carried by the lid 112 (see [link to documentation]). Figure 6 ).

[0090] With cap 112 removed, coarse filter 148 (see...) Figure 6Remove from container 108. The user can grasp the coarse filter 148 and lift it from the tank container 108. As the coarse filter 148 is lifted upwards, larger debris and hair are captured on the coarse filter 148, while liquid and small debris are discharged through the coarse filter 148. The user can then discard any debris on the coarse filter 148 into the waste container.

[0091] The remaining dirty liquid in container 108 can be disposed of by inverting container 108 and pouring the dirty liquid into a suitable liquid waste container (such as a sink, toilet, or drain).

[0092] The above steps are typically performed in reverse order to reassemble canister 22 and reinstall it onto floor cleaner 10. Optionally, device 10 may have features that prevent canister 22 from being installed if filter 116 is not in place. For example, if filter 116 is missing, a feature may prevent filter mount 126 from pivoting to a nested position. This prevents canister 22 from being fully inserted into canister receiver 92 without a filter.

[0093] Figure 13 An alternative embodiment of the recycling tank 22 is shown, wherein the recycling tank 22 has a filter latch 160 that a user can engage to hold the filter mount 126 in a nested position when it is removed from the floor cleaner 10, and to prevent the filter mount 126 from moving to an exposed position. In this embodiment, as previously described, the filter mount 126 will automatically move the filter 116 to the exposed position without user intervention; however, once the tank 22 is removed, the user can selectively engage the filter latch 160 to hold the filter mount 126 in the nested position. Figure 13 The filter latch 160 is shown engaged to secure the filter mount 126 in a nested position. This allows for easier reinstallation of the canister 22 back onto the floor cleaner 10 and allows the filter 116 to be vertically removed and / or inserted along the vertical insertion axis V, as shown. Figure 13 As shown. Optionally, the filter latch 160 may be included in any embodiment of the tank 22 described herein.

[0094] Various embodiments of the filter latch 160 are possible. In one embodiment, pushing the filter mount 126 down into a nested position engages the filter latch 160, locking the filter mount 126 in place until the can 22 is reinstalled on the floor cleaner. Can receiver 92 ( Figure 5The latch 160 can be configured to disengage when the can 22 is reinstalled, such that the latch 160 is reset upon the next removal of the can 22, and the filter 116 will automatically move to the exposed position without user intervention, as previously described. For example, the latch 160 can be mounted to the cap 112 and may have a latch end 162 that is linearly movable and selectively overlaps with the filter holder 126 to hold it in a nested position. The latch 160 also has a latch actuator 164 coupled to the latch end 162. A portion of the can receiver 92 presses against the latch actuator 164 during can 22 installation and retracts the latch end 162 to place the latch 160 in the disengaged position.

[0095] Figures 14 to 15 Another alternative embodiment of the recycling tank 22 is shown, wherein the filter mount 126 has at least one rotational damper 170 to slow down the filter 116 as it rotates to the exposed position. Damping the opening action helps control the force on the filter 116 and prevents the filter 116 from popping out of the tank 22 when the filter mount 126 flips upward. It is worth noting that, depending on the damping force and the degree of deceleration of the opening action, the filter 116 may only begin to open automatically, e.g., pop out, after the tank 22 has been completely removed from the receiver 92 (see [link to documentation]). Figure 11 Alternatively, the rotational damper 170 may be included in any embodiment of the tank 22 described herein.

[0096] In one embodiment, tank 22 may include two rotational dampers 170 operatively coupled to two pivot arms forming hinge 128. Each damper 170 may apply resistance or torque to one of the pivot arms, thereby effectively controlling the pivoting movement of filter mount 126.

[0097] Figures 16 to 19 Another alternative embodiment of the recycling tank 22 is shown, in which the filter ejection mechanism does not immediately pivot to expose the upstream side 118 of the filter, but first translates upward along the vertical insertion axis V to space the filter 116 a certain distance from the upper end 22U of the tank 22, as shown. Figure 17 As shown, it then automatically flips to expose the upstream side 118, as... Figure 18 As shown. In this position, the user can visually inspect the upstream side 118 to determine the degree of dirtiness of the filter 116 without touching the filter 116 or any other dirty parts of the device 10. The filter 116 can then be selectively removed from the tank 22, as shown. Figure 19 As shown. Optionally, a translation / rotation ejection mechanism may be included in any embodiment of the tank 22 described herein.

[0098] In one embodiment, the filter mount 180 is connected to the can lid 112 via a pair of extendable arms 182. The filter mount 180 supports the filter 116 on the can 22. Each arm 182 is connected to the lid 112 at one end and to the filter mount 180 at the other end. The filter mount 180 is pivotally connected to the arm 182 via a hinge or bearing 184. The arm 182 may be biased upward by a spring (not shown) such that when the can 22 is removed from the floor cleaner, the arm 182 translates upward, causing the filter mount 180 to rise away from the lid 112. Extending the arm 182 to its uppermost position forces the filter mount 180 to rotate approximately 180 degrees about the hinge 184, allowing the upstream side 118 of the filter 116 to be visible from a user's view of the top of the can 22.

[0099] Filter 116 is configured to slide into and out of mounting base 180, or otherwise insert into and be removable from said mounting base. In one embodiment, filter mounting base 180 may have a U-shaped filter frame complementary to the shape of filter 116. For example, filter mounting base 180 may surround three sides of filter 116. Filter mounting base 180 may be provided with guide rails or other guiding devices for holding filter 116 therein. Figure 18 As shown, when the filter mount 180 is in the extended and exposed position, the filter 116 can be removed from and inserted into the filter mount 180 along the insertion axis D, which may be, for example, perpendicular to the axis of hinge 184 and / or perpendicular to the vertical translation axis V. Other configurations for the filter mount 180 are possible.

[0100] Figure 20 Another alternative embodiment of the recycling tank 22 is shown, in which the filter 116 is not removable with the tank 22, but is coupled to the tank receiver 92, and the filter ejection mechanism is configured to automatically "eject" the filter 116 after the recycling tank 22 is removed from the upright body 12, placing it in an exposed position and exposing the upstream side 118.

[0101] In one example, the filter mount 190 is pivotally connected to the can receiver 92 via a hinge 192 and is biased toward an exposed position, an example of which is shown in [example missing]. Figure 20 As shown in the diagram. Filter mount 190 supports filter 116 on floor cleaner 10. In the nested position (not shown), filter mount 190 is received within can receiver 92, for example, within the top plate 102 of can receiver 92, and in the exposed position, filter mount 190 is at least partially outside receiver 92.

[0102] When the canister 22 is removed from the receiver 92, the filter mount 190 rotates downward and forward about the axis H defined by the hinge 192, thereby exposing the upstream side 118 of the filter 116. Depending on the configuration of the bracket 180, the filter 116 can be removed from the bracket 180 by sliding it downward or forward.

[0103] Figure 21 An alternative embodiment of the recycling tank 22 is shown, wherein the recycling tank 22 has a dry position. The tank 22 can still be completely removed from the device 10 for emptying and cleaning, and optionally for maintaining the filter 116, but instead of air-drying the tank 22 during disassembly or reinstalling the still-wet tank 22 (which could result in an unpleasant odor), the tank 22 can be reinserted onto the device 10 in a dry position, as shown below. Figure 21 As shown. In the dry position, the lower end of can 22 is positioned within receiver 92, and the upper end of can 22 is pivotally rotated out of receiver 92, exposing filter 116. Allowing can 22 to be stored in the open position within receiver 92 enables faster drying of can 22, lid 112, filter 116, and other internal surfaces of the can after use. The user can simply push the receiving can 22 into the fully assembled position within can receiver 92 before cleaning operations (e.g., ...). Figure 1 When tank 22 is moved to the fully assembled position, filter 116 automatically pivots back to the nested position. Optionally, the drying position may be included in any embodiment of tank 22 described herein.

[0104] While a specific embodiment of a surface cleaning device with a maintainable filter has been shown, other embodiments of the surface cleaning device with a maintainable filter are also within the scope of this disclosure. Surface cleaning devices with maintainable filters can be used in different types of cleaning equipment, including, but not limited to, "all-in-one" cleaning equipment, upright cleaning equipment having a cleaning base and an upright body for guiding the base to move on the surface to be cleaned, tank equipment having a cleaning tool connected to a wheeled base via a vacuum hose, "pole" equipment, portable cleaning equipment suitable for user handheld use to clean smaller areas, robotic cleaning equipment, and central vacuum systems. Surface cleaning devices with maintainable filters can also be used in equipment that performs only "dry" vacuum cleaning or in equipment with steam delivery.

[0105] As used herein, the terms “comprising” or “including” mean and encompass, in their broadest sense, the concepts of “comprising,” “including,” “substantially constitute,” and “consistent with.” The use of “for example,” “such as,” and “comprising” to list illustrative examples is not limited to the examples listed. Therefore, “for example” or “for instance” means “for example, but not limited to” or “such as, but not limited to,” and encompasses other similar or equivalent examples.

[0106] The above description relates to general and specific embodiments of this disclosure. However, various changes and variations may be made without departing from the spirit and broader aspects of this disclosure as defined in the appended claims, which will be interpreted in accordance with patent law principles including the doctrine of equivalents. Therefore, this disclosure is made for illustrative purposes only and should not be construed as an exhaustive description of all embodiments of this disclosure, or as limiting the scope of the claims to the specific elements shown or described in connection with those embodiments. Any reference to an element in the singular (e.g., using the articles “a,” “an,” or “the” or “the”) shall not be construed as limiting said element to the singular.

[0107] Similarly, it should be understood that the appended claims are not limited to the specific compounds, compositions, or methods described in the specific embodiments, which may vary among specific embodiments falling within the scope of the appended claims. Regarding any Markush group relied upon herein to describe a specific feature or aspect of various embodiments, different, specific, and / or unexpected results may be obtained from each member of the corresponding Markush group, independent of all other Markush members. Each member of a Markush group may be relied upon individually and or in combination, and provides sufficient support for the specific embodiments within the scope of the appended claims.

Claims

1. A surface cleaning device, comprising: A housing including an intake port for drawing in liquids, debris, and air, the housing being movable on the surface to be cleaned; A suction source located within the housing is configured to generate a working airflow through a recovery path including the suction port; A recycling tank, removably mounted on the housing and forming part of the recycling passage, the recycling tank comprising: A can container, the can container including an opening at its upper end; and A can lid that closes the opening at its upper end, the can lid including a groove and an air outlet through which the working airflow exits the recycling tank; A filter located downstream of the air outlet fluid, the filter comprising an upstream side and a downstream side, through which the working airflow passes sequentially; and A filter mounting base, connected to one of the can lid and the housing, the filter mounting base being configured to support the filter and having: In a nested position, the filter mount is at least partially received within the recess of the can lid, and the upstream side of the filter faces the bottom of the recess; and An exposed location in which the filter mount is at least partially located outside the recess and the upstream side of the filter is visible; The filter mount is configured to automatically move from the nested position to the exposed position in response to the removal of the recycling tank from the housing, thereby enabling the user to visually inspect the upstream side of the filter to determine the degree of dirtiness of the filter.

2. The surface cleaning device of claim 1, wherein the filter mount is hinged to the can lid and biased toward the exposed position by at least one spring, the hinge defining an axis about which the filter mount pivots.

3. The surface cleaning apparatus of claim 1, wherein the recycling tank includes a front side and a rear side, and wherein the filter mount is hinged to the tank lid, the hinge defining a pivot axis closer to the rear side than the front side, such that when the recycling tank is automatically moved from the nested position to the exposed position in response to removal from the housing, the filter mount pivots upward and away from the front side of the recycling tank.

4. The surface cleaning apparatus of claim 1, wherein the housing includes a recycling tank receiver, and the filter mount is configured to automatically move to the nested position in response to mounting the recycling tank into the recycling tank receiver.

5. The surface cleaning apparatus of claim 1, wherein the filter comprises a filter medium comprising a first porous foam layer, a second porous foam layer located downstream of the first porous foam layer, and a nonwoven layer located downstream of the second porous foam layer, the nonwoven layer defining the downstream side of the filter, and the porous layer defining the upstream side of the filter.

6. The surface cleaning apparatus of claim 1, wherein the filter comprises a filter medium comprising a porous foam layer and a nonwoven layer, the nonwoven layer defining the downstream side of the filter and the porous layer defining the upstream side of the filter.

7. The surface cleaning apparatus of claim 1, wherein the filter mount is pivotally coupled to one of the can lid and the housing for rotation about a pivot axis, and wherein the filter mount includes a filter frame with a shape complementary to the filter, wherein the filter is removable from and inserted into the filter frame along an insertion axis perpendicular to the pivot axis.

8. The surface cleaning apparatus of claim 1, wherein the recovery tank includes a filter latch capable of selectively engaging to retain the filter mount in the nested position and prevent the filter mount from moving to the exposed position.

9. The surface cleaning apparatus of claim 1, wherein the recovery tank comprises at least one of the following: A riser located inside the tank container forms a flow path between the tank inlet formed at the lower end of the tank container and the opening at the upper end of the riser; as well as A baffle that directs liquid and / or debris in the working airflow to the side and / or bottom of the recovery tank; The filter is located downstream of the fluid in at least one of the riser and the baffle within the recovery passage; and When the recycling tank is installed on the housing, the filter is located above at least one of the riser and the baffle.

10. A surface cleaning device, comprising: An upright body, the upright body including a handle and a frame; A cleaning base, which is operatively connected to the upright body; The agitator on the cleaning base; Supply tank, the supply tank being adapted to hold cleaning fluid; The fluid distributor on the cleaning base is in fluid communication with the supply tank; Recycling pathways; A suction source, configured to generate a working airflow through the recovery path; The suction port is disposed together with the cleaning base and is in fluid communication with the suction source; A recycling tank, removably mounted on the frame and forming part of the recycling path, the recycling tank comprising: A can container, the can container including an opening at its upper end; and A can lid that closes the opening at its upper end, the can lid including a groove and an air outlet through which the working airflow exits the recycling tank; A filter located downstream of the air outlet fluid, the filter comprising an upstream side and a downstream side, through which the working airflow passes sequentially; and A filter mounting base, connected to one of the can lid and the frame, the filter mounting base being configured to support the filter and having: Nested position, in which the upstream side of the filter faces the air outlet and is hidden and invisible; and An exposure location in which the upstream side of the filter is visible; The filter mount is configured to automatically move from the nested position to the exposed position in response to removal of the recycling tank from the frame, allowing the user to visually inspect the upstream side of the filter to determine the degree of dirtiness of the filter.

11. The surface cleaning apparatus of claim 10, wherein the filter mount is pivotally mounted to the can lid via a hinge and is biased to automatically move from the nested position to the exposed position in response to removal of the recycling can from the frame.

12. The surface cleaning apparatus of claim 10, wherein the filter mount is hinged to the can lid and biased toward the exposed position by at least one spring, the hinge defining an axis about which the filter mount pivots.

13. The surface cleaning apparatus of claim 10, wherein the recycling tank includes a front side and a rear side, and wherein the filter mount is hinged to the tank lid, the hinge defining a pivot axis closer to the rear side than the front side, such that when the recycling tank is automatically moved from the nested position to the exposed position in response to removal from the frame, the filter mount pivots upward and away from the front side of the recycling tank.

14. The surface cleaning apparatus of claim 10, wherein the frame includes a recycling tank receiver, and the filter mount is configured to automatically move to the nested position in response to mounting the recycling tank into the recycling tank receiver.

15. The surface cleaning apparatus of claim 10, wherein the filter comprises a filter medium comprising a first porous foam layer, a second porous foam layer located downstream of the first porous foam layer, and a nonwoven layer located downstream of the second porous foam layer, the nonwoven layer defining the downstream side of the filter, and the porous layer defining the upstream side of the filter.

16. The surface cleaning apparatus of claim 10, wherein the filter comprises a filter medium comprising a porous foam layer and a nonwoven layer, the nonwoven layer defining the downstream side of the filter and the porous layer defining the upstream side of the filter.

17. The surface cleaning apparatus of claim 10, wherein the filter mount is pivotally coupled to one of the can lid and the frame for rotation about a pivot axis, and wherein the filter mount includes a filter frame with a shape complementary to the filter, wherein the filter is removable from and inserted into the filter frame along an insertion axis perpendicular to the pivot axis.

18. The surface cleaning apparatus of claim 10, wherein the recovery tank includes a filter latch capable of selectively engaging to retain the filter mount in the nested position and prevent the filter mount from moving to the exposed position.

19. The surface cleaning apparatus of claim 10, wherein the filter mount has at least one rotation damper for slowing the movement of the filter from the nested position to the exposed position.

20. The surface cleaning apparatus of claim 1, wherein the recovery tank comprises at least one of the following: A riser located inside the tank container forms a flow path between the tank inlet formed at the lower end of the tank container and the opening at the upper end of the riser; as well as A baffle that directs liquid and / or debris in the working airflow to the side and / or bottom of the recovery tank; The filter is located downstream of at least one of the riser and the baffle within the recovery passage; and When the recycling tank is installed on the housing, the filter is located above at least one of the riser and the baffle.

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