Patent Application
20100251505
The invention relates generally to cleaning appliances having two or more cleaning functions, and more specifically to cleaning appliances which vacuum surfaces and apply steam to surfaces.
Steam cleaning devices such as steam mops are known to sanitize floors by applying steam through a material such as a steam-permeable fabric. The steam-permeable fabric to additionally may clean the floor by picking up dust, dirt or other debris as the steam mop is moved across the floor. If large amounts of such particles are present, the fabric may become soiled quickly and require frequent cleaning. Accordingly, a floor may be prepared for steam cleaning by sweeping or vacuuming the floor.
Embodiments of the invention provided herein are directed to cleaning appliances, methods and systems in which one cleaning appliance is capable of performing two or more cleaning functions. For example, a cleaning appliance may include a suction function and a steam function for cleaning and sanitizing floors or other surfaces. In some embodiments, each function is operated separately, while in other embodiments, two or more functions may be performed simultaneously. Various switching arrangements, control arrangements, and/or component configurations may used to control operation of the cleaning functions.
According to one embodiment of the invention, a cleaning appliance comprises an appliance body including a debris inlet in communication with an air flow passage, a source to generate steam, a steam outlet in communication with a steam conduit, the steam conduit being in communication with the steam generation source, and an obstruction element configured to selectively obstruct at least one of the debris inlet and the air flow passage to prevent steam from moving through the air flow passage past the obstruction element.
According to another embodiment of the invention, a cleaning appliance capable of performing at least two different cleaning functions includes a housing, a cleaning head, a controller configured to control operation of a first cleaning function and a second cleaning function, and a component selectively attachable to the cleaning appliance. When the selectively attachable component is not attached to the cleaning appliance, the controller is capable of operating the cleaning appliance to perform the first cleaning function, and when the selectively attachable component is attached to the cleaning appliance, the controller is capable of operating the cleaning appliance to perform the second cleaning function.
According to a further embodiment of the invention, a cleaning appliance includes a to source to generate steam, a cleaning head having a steam outlet in communication with the steam generation source, the cleaning head further including an alignment feature. The cleaning appliance further includes a selectively attachable support for a cleaning pad, the support including an alignment feature which is complementary to the alignment feature of the cleaning head to guide the attachable support into alignment with the cleaning head when the cleaning head and the attachable support are moved toward one another.
According to another embodiment of the invention, a cleaning appliance includes a floor cleaning head, a user handle connectable to the floor cleaning head through a pole and/or a component housing, and a selectively removable pad support that is attachable to a floor-facing side of the floor cleaning head. The selectively removable pad support includes a step portion which extends laterally from the floor cleaning head such that an upper side of the step portion is accessible to a portion of a user's foot. The selectively removable pad support and the floor cleaning head are constructed and arranged such that pulling the floor cleaning head upwardly while a user steps on the step portion removes the pad support from the floor cleaning head.
According to a further embodiment of the invention a method of attaching and removing a selectively removable pad support from a cleaning head of a cleaning appliance includes acts of placing a selectively removable pad support on a floor, moving a cleaning head of a cleaning appliance downwardly onto an upper side of the pad support such that a floor-facing side of the cleaning head engages with the pad support, and cleaning the floor with the cleaning appliance with the pad support on the cleaning head. The method further includes stepping on a step portion of the pad support which extends laterally from the underside of the cleaning head, and pulling upwardly on the cleaning head to remove the pad support from the cleaning head.
According to yet another embodiment of the invention, a cleaning appliance includes a suction opening in communication with an air flow passage, the air flow passage being configured to communicate with a source to generate suction, and a steam outlet in communication with a steam conduit, the steam conduit being configured to communicate with a source to generate steam to create a steam path from the steam outlet. The cleaning appliance further includes a steam-permeable fabric, and a selectively removable support configured to hold the steam-permeable fabric such that the steam-permeable fabric intersects the steam path and steam permeates the steam-permeable fabric when steam is emitted from the steam outlet.
According to another embodiment of the invention, a cleaning appliance comprises an appliance body including a first cleaning function source operative upon energization, and a second cleaning function source operative upon energization. The cleaning appliance also comprises a control system for the appliance body including a first switch having an on mode and an off mode, the first switch being required to be in the on mode for the first cleaning function source to be energized, and a second switch having an on mode and an off mode, the second switch being required to be in the on mode for the second cleaning function source to be energized. Also included is a movable cover having first and second positions, wherein in the first position, the cover prevents access to the first switch and permits access to the second switch, and wherein in the second position, the cover prevents access to the second switch and permits access to the first switch. Moving the cover from the first position to the second position switches the second switch to the off mode.
According to a further embodiment of the invention, a cleaning appliance comprises a housing, a cleaning head, a first cleaning function source operative upon energization, a second cleaning function source operative upon energization, a first switch having a first mode and a second mode, and a second switch having a first mode and a second mode, the second switch being constructed and arranged such that attachment of a selectively attachable cleaning component to the cleaning appliance causes the second switch to change from the first mode to the second mode. The first switch is required to be in the second mode and the second switch is required to be in the second mode for the first cleaning function source to be energized.
According to yet another embodiment of the invention, a cleaning head for a vacuum appliance is provided, with the cleaning head being movable in at least a first direction. The cleaning head includes a housing including a floor-facing surface, and a suction opening in the floor-facing surface, the suction opening being in communication with an air flow passage, the air flow passage being configured to communicate with a source to generate suction. The suction opening has a perimeter, and a portion of the perimeter extends downwardly from the floor-facing surface farther than other portions of the perimeter to form a debris catch, the debris catch being positioned to be transverse the first direction of movement.
According to a further embodiment of the invention, a cleaning head for a vacuum appliance includes a floor-facing surface having a front, a rear, and two sides, a suction opening, and a recessed portion of the floor-facing surface in communication with the suction opening, the recessed portion having first, second and third widths in a side-to-side direction of the floor-facing surface. The first width is located closer to the front of the floor-facing surface than the second and third widths, the third width is located closer to the rear of the floor-facing surface than the first and second widths, and the second width is located between the first and third widths in a front-to-rear direction of the floor-facing surface. The first and third widths are wider than the second width.
The accompanying drawings are not intended to be drawn to scale. For purposes of clarity, not every component may be labeled in every drawing. In the drawings:
a is a top, rear perspective view of a selectively removable attachment for a cleaning head according to one embodiment;
b is a top, front perspective view of another embodiment of a electively removable attachment for a cleaning head;
It should be understood that aspects of the invention are described herein with reference to the figures, which show illustrative embodiments in accordance with aspects of the invention. The illustrative embodiments described herein are not necessarily intended to show all aspects of the invention, but rather are used to describe a few illustrative embodiments. Thus, aspects of the invention are not intended to be construed narrowly in view of the illustrative embodiments. In addition, it should be understood that aspects of the invention may be used alone or in any suitable combination with other aspects of the invention.
Embodiments of the invention provided herein are directed to cleaning appliance systems which are capable of cleaning floors and/or other surfaces. Examples of surface cleaners include steam mops, portable steam cleaners, vacuum cleaners, and floor sweepers, among others.
When a steam mop is used to clean a floor, a user typically first vacuums or sweeps the floor to remove dirt, dust and other debris. To reduce the number of appliances, time and effort used to complete these activities, the functionalities of debris removal and steam cleaning are combined in a single cleaning appliance according to some embodiments disclosed herein. When debris removal and steam cleaning are provided on a single cleaning appliance, simultaneous operation of both functions may be undesirable because in some cases moisture could travel into an air flow conduit or a dirt collector and form grime or mud with the collected debris. The resulting mess could reduce the effectiveness and convenience of the appliance.
According to one aspect of the invention, a selectively removable attachment is provided for a cleaning appliance which has steam cleaning and debris removal functionality. During steam cleaning, the attachment may be positioned to physically prevent steam from entering a debris inlet and traveling along an air flow conduit. In some embodiments, the attachment may be attached to a cleaning head and protect substantially the entire underside of the cleaning head from steam contact such that air flow channels present on the floor-facing surface of the cleaning head do not become moist.
According to another aspect of the invention, to prevent the passage of steam, an obstruction may be selectively implemented to obstruct an air flow conduit or debris inlet. For example, a valve may be provided to selectively block the air flow conduit, or a sliding door may be provided to selectively block the debris inlet.
Instead of, or in addition to, physically blocking the debris inlet to an air flow conduit, the cleaning appliance may include a control arrangement which prevents the debris removal portion of the appliance from operating when a selectively attachable component, such as a cleaning pad support, is attached to the appliance. For example, a switch having two modes may be provided in the cleaning head, and an element in the selectively removable attachment changes the mode of the switch when the attachment is secured to the cleaning head.
In an embodiment including a steam cleaning function and a debris removal function such as vacuuming, the presence of the attachment and its associated element may change the cleaning head switch to a steam mode which permits operation of a steam cleaner and prevents operation of a vacuum cleaner. When the attachment is removed, the lack of the element may change the cleaning head switch to a vacuum mode, enabling operation of the vacuum cleaner and preventing operation of the steam cleaner.
A manual switching arrangement also may be used to control the operation of two or more functionalities in a cleaning appliance. For example, in some embodiments, a separate on/off switch is provided for each of a first cleaning function and a second cleaning function. The two on/off switches are positioned adjacent one another, and a switch cover is movable to cover one of the two on/off switches. As the switch cover moves from covering a first on/off switch to covering a second on/off switch, the switch cover forcibly turns off the second switch. In this manner, when changing from the first cleaning function to the second cleaning function, both on/off switches cannot simultaneously be in the “on” position. Additionally, the switching arrangement may be similarly configured such that as the switch cover moves from covering the second on/off switch to covering the first on/off switch, the switch cover forcibly turns off the first on/off switch. Accordingly, in some embodiments the two switches cannot both be in the “on” position and the two cleaning functions cannot operate simultaneously.
According to another aspect of the invention, the selectively removable attachment may be configured to support a cleaning pad. The cleaning pad may be selectively removable from the attachment, and may be used to wipe dust and dirt from the surfaces being cleaned. In some embodiments, the cleaning pad is formed with a steam-permeable fabric such that steam travels through the pad before reaching the floor or other surface to be cleaned.
A selectively removable attachment, such as a cleaning pad support, may be attached and/or removed from the cleaning head without the user having to bend down to the level of the cleaning head. For example, the cleaning pad support may have one or more guide elements which help guide the cleaning pad support into a seated attachment with the cleaning head. In some embodiments, the cleaning pad support has one or more features which correspond to complementary features positioned on the floor-facing side of the cleaning head. The features help guide the cleaning pad support into alignment with the cleaning head, and magnets or other attachment elements secure the cleaning pad support to the cleaning head. In this manner, with an upright cleaning appliance, the user can remain standing while lifting or tilting the cleaning appliance and placing the cleaning appliance on the cleaning pad support. To permit removal of the cleaning pad support without bending, a step portion may extend outwardly from the cleaning pad support such that an upper side of the step portion is exposed for a user to step on. While stepping on the step portion, the user lifts the cleaning head upwardly, and the cleaning pad support disengages from the cleaning head.
Referring to
Cleaning appliance 100 may be used to vacuum a floor prior to steam cleaning. The vacuum function of cleaning appliance 100 is operated to suction dirt, dust and/or other debris into suction opening 222, through an air flow conduit 226 and into a dirt collection container 102. Once vacuuming is complete, the cleaning appliance may be switched to a steam cleaning mode by attaching an additional component to cleaning appliance 100.
A selectively removable attachment, such as a cleaning pad support 128, is shown removed from cleaning appliance 100 in
Floor cleaning head 112 may vacuum dust, dirt and other debris from an area larger than suction opening 122. For example, as shown in
The particular embodiment of a floor cleaning head shown in
One embodiment of cleaning pad support 128 is shown in
Cleaning pad support 128 additionally blocks suction opening 222 so that the steam being released by the steam cleaner does not enter the air flow conduit. In the embodiment illustrated in
In still further embodiments, a sealing pad, such as a silicone or plastic pad, may be positioned on cleaning pad support 128 such that when cleaning pad support 128 is mounted to floor cleaning head 112, the pad seals against suction opening 222. Further, a hinged door or a sliding door may be positioned at suction opening 222, with the door being closed during steam operation, and open during vacuum operation.
In the embodiment illustrated in
Instead of, or in addition to blocking suction opening 222, the air flow conduit between suction opening 222 and the dirt collection assembly may be blocked during steam operation. For example, a butterfly valve, a flapper valve, or any other suitable selectively closeable blocking element may be positioned in the air flow conduit to selectively block the conduit.
Cleaning pad support 128 may be formed with any suitable material and by any suitable method of manufacturing. In some embodiments, cleaning pad support 128 is formed with injection-molded polypropylene with glass filler. Other plastic or plastic-based materials, or any suitable material(s) may be used.
Attachment areas 408 are provided at various locations on cleaning pad support 128 to hold the selectively removable cleaning pad. The attachment areas may include hook or loop material for attachment to corresponding loop or hook material on the pad. Attachment areas may include attachment element holders, such as attachment element holders 360 shown in
In some embodiments, a steam outlet may include a manifold having a plurality of openings for distributing steam in different areas of cleaning pad support 128. Further, a selectively removable attachment other than a cleaning pad support may be used to distribute steam in some embodiments. For example, a removable attachment which does not support a pad may be provided on floor cleaning head 112, and steam may be applied directly to the floor from one or more steam outlets.
Alignment, seating and attachment features are provided on cleaning pad support 128 to aid in attaching cleaning pad support 128 to floor cleaning head 112. In the embodiments shown in
An attachment feature may be included in the alignment features according to one aspect of the invention. For example, magnet fins 306 extend out of an upper surface of protrusions 304, and are positioned to hold to corresponding steel plates 236 provided in recesses 232. The magnetic material may take different forms and be incorporated within the alignment feature or constitute the alignment feature, as should be apparent to one of skill in the art. Other attachment arrangements may be used to attach cleaning pad support 128 to floor cleaning head 112. For example, a hook and loop fastener arrangement may be used. In still other embodiments, attachment arrangements may be used which require a user to crouch down to the level of the floor cleaning head 112 to attach and/or remove a selectively removable attachment such as a cleaning pad support.
By using magnets to attach cleaning pad support 128 to floor cleaning head 112, attachment and removal of the cleaning pad support 128 does not require numerous actions on the part of the user. To attach the cleaning pad support 128 to floor cleaning head 112, as described above, the user simply lowers the cleaning appliance onto cleaning pad support 128 either by tilting the cleaning appliance onto cleaning pad support 128, or by picking up the cleaning appliance and placing it onto cleaning pad support 128. To remove cleaning pad support 128, the user steps on a step portion 310 with her toes or other portion of her foot to restrain cleaning pad support 128, and applies an upward force on the cleaning head to separate the two components, either by tilting the cleaning appliance or by pulling upwardly on the cleaning appliance.
One or both of the magnets 306 provided in alignment features 304 may be used as part of a control configuration where presence of the magnet near to the cleaning head changes a switch from a first mode to a second mode. For example, a magnetic reed switch (not shown) may be positioned within floor cleaning head 112 such that one of magnetic fins 306 changes the reed switch's mode from a first mode to second mode. With cleaning pad support 128 attached to cleaning appliance 100, which puts the reed switch in the second mode, a cleaning function such as steam cleaning, may be permitted to be operated. Placing the reed switch in the second mode does not necessarily actuate steam cleaning, but instead places the controls into a state where activation of steam cleaning is permitted, for example by turning a manual switch to an “on” position.
The presence of magnets 306 near the reed switch also may place the controls into a state where activation of another function, such as vacuuming, is not permitted. In some embodiments, attaching cleaning pad support 128 to floor cleaning head 112 automatically turns off the vacuum function if the vacuum cleaner is operating. Alternative components may be used instead of a reed switch to register the presence of magnets 306 or other elements which indicate attachment of the selectively removable attachment. For example, a hall effect sensor may be positioned in the floor cleaning head 112 to sense the presence of magnets 306.
Other features which may be included on cleaning pad support 128 include recesses, such as shallow rectangular recesses 312, which are configured to accept wheels 126 of floor cleaning head 112. Support ribs 314 may be provided in various arrangements on cleaning pad support 128 to help maintain the support in a planar configuration. An upwardly extending lip 316 positioned around the perimeter of cleaning pad support 128 helps prevent steam from entering the area between the floor-facing surface of floor cleaning head 112 and cleaning pad support 128. Lip 316 is partially supported by ribs 318 in the embodiment illustrated in
A cleaning pad support is not required in some embodiments. For example, a steam pad or other cleaning pad may be directly attachable to a floor cleaning head. A silicone pad or other structure may be positioned on an upper surface of the cleaning pad and configured to seal the suction opening when the cleaning pad is attached to floor cleaning head. Magnets, hook and loop fastener arrangements, or other attachment arrangements may be used to directly attach the pad to the floor cleaning head. In embodiments where a cleaning pad is attached directly to the floor cleaning head 112, magnets may be held by the pad as part of a control arrangement that switches modes when the presence of a cleaning pad is sensed.
Elements may be provided on cleaning pad support 128 to help maintain contact between the cleaning pad and cleaning pad support 128, and between the cleaning pad and the surface to be cleaned. For example, as may be seen in
One embodiment of a steam pad 600 which may be used with embodiments herein is shown in
Hook or loop fastener material areas 602 may be positioned at various locations on an upper surface 604 of steam pad 600. Areas 602 are positioned to correspond with attachment areas 408 of cleaning pad support 128 or floor cleaning head 112. It should be appreciated that other suitable arrangements for attaching steam pad 600 to cleaning pad support 128 or floor cleaning head 112 may be employed.
Turning now to manual control of the functionality of cleaning appliance 100, a manual switching arrangement 700 is shown in
Switching arrangement 700 includes a steam on/off switch 702 and a vacuum on/off switch 704 positioned within a recess 708. A switch cover 706, shown in dashed lines in
While manual switching arrangement 700 is shown on the front of cleaning appliance 100 toward a top of a component housing 714, switching arrangement 700 may be positioned at any suitable location on cleaning appliance 100.
Switch cover 706 may be constructed and arranged to be slidable in any suitable manner. As shown in
Other manual switching arrangements may be used which prevent simultaneous actuation and/or operation of two or more cleaning modes in the cleaning appliance. For example, instead of separate manual on/off switches for steam and vacuum, a single manual switch having three or more positions may be used. A first position may activate the steam function, a second position may activate the vacuum function, and a third position may turn off both functions. Time delay circuitry may be employed to prevent a rapid change from one function to another and/or to prevent rapid cycling. In some embodiments of cleaning appliances incorporating aspects disclosed herein, simultaneous actuation and/or operation of two or more cleaning functions may be permitted.
In some embodiments including a steam cleaning functionality, an “off” mode for steam cleaning may keep a steam generator energized in a standby mode. For example, a steam boiler may be operated at a reduced power, for example at 50% of the power level at which the boiler is operated when fully energized. Or, a boiler thermostat setting may be reduced such that boiler cycles on less frequently, but maintains a temperature above ambient temperature.
A controller for the various functionalities within the cleaning appliance may include a microprocessor, electronics disposed on a printed circuit board, integrated or discrete components, and/or application-specific hardware.
The vacuum cleaning function of certain cleaning appliance embodiments disclosed herein is exemplified as including an upright vacuum cleaner. Any of the appliances disclosed herein may contain one or more cyclonic cleaning stages and/or additional filtration stages, such as physical filter elements. It will be appreciated that the surface cleaning appliance may be of various configurations (e.g., a canister vacuum cleaner, a hand held vacuum cleaner, a back-pack vacuum cleaner and the like). It will also be appreciated that the cyclone and shroud construction disclosed herein may be used as a first stage cleaning step. However, in other embodiments, additional air treatment members may be provided upstream and/or downstream of the cyclone. It will be appreciated that the cyclone chamber and the dirt collection chamber may be in any orientation. In some embodiments, the air inlet of the cyclone chamber is below the opposed end of the cyclone chamber during use. Accordingly, for convenience, the air inlet end of the cyclone chamber and the portion of the dirt collection chamber in which the dirt collects may be referred to as the lower end and the opposed ends may be referred to as the upper ends.
Referring to
Upright section 1114 is pivotally mounted to floor cleaning head 1112. As illustrated, upright section 1114 includes a housing 1120 having a recess 1122 in which cyclone unit 1124 is removable mounted. When mounted in recess 1122, cyclone unit 1124 forms part of the air flow path through cleaning appliance 1110.
As exemplified, upright section 1114 includes motor housing 1126 positioned above recess 1122. An air exit grill 1128 is provided immediately above recess 1122 and provides the clean air outlet for cleaning appliance 1110. It will be appreciated that the suction motor may be provided at any location in cleaning appliance 1110 (it may be upright section 1114 or it may be in floor cleaning head 1112 as known in the art). Accordingly, the air flow path from the suction opening to the clean air outlet may be of various configurations. Further, a handle for driving the cleaning head may be provided on upright section 1114 or floor cleaning head 1112 as is known in the art (not shown).
Referring to
The cyclone chamber and dirt collection chamber construction exemplified in
As exemplified therein, cyclone unit 1124 comprises a lower air inlet section 1138, a cyclone section 40 and an upper filter section 42. Cyclone unit air inlet 1134 is provided on air inlet section 1138. Cyclone unit air inlet 1134 extends to air inlet chamber 1152 which is defined between lower wall 1144 of air inlet section 1138, lower wall 1146 of cyclone section 1140, outer wall 1138 and inner wall 1150. As shown in
As exemplified, air inlet section 1138 is provided with optional feet 1160 to assist cyclone unit 1124 properly seating in recess 1122.
Cyclone section 1140 comprises cyclone chamber 1156 and dirt collection chamber 1162. Referring to
Cyclone chamber wall 1170 extends longitudinally from lower wall 1146 toward upper wall 1166 and terminates at a distance spaced therefrom. Accordingly, cyclone chamber wall 1170 has an end face 1172 that is spaced from and faces the second end of dirt collection chamber 1162 to define a gap 1174 having a height H. Gap 1174 accordingly defines the dirt outlet of cyclone chamber 1156. Height H may be from 1 cm to 6 cm in some embodiments, for example 3.5 cm.
Filter section 1142 comprises an optional openable lid 1176. Lid 1176 may be removably mounted to cyclone section 1140 by any means known in the art. For example, as exemplified in
Perforated shroud 1184 is provided on lid 1176 and is removably mounted to lid 1176. As exemplified, lid 1176 is provided with an opening 1186 in upper wall 1166. Descending wall 1184 is provided to define opening 1186. Shroud 1184 is provided with an upper collar 1190 which seats on descending wall 1188. It will be appreciated that shroud 1184 may be mounted to descending wall 1188 by any means known in the art, such as by a friction fit, bayonet mount, screw mount, welding an adhesive or the like.
As shroud 1184 is mounted to lid 1176, shroud 1184 has an upstream portion 1192 that is positioned in cyclone chamber 1156 and a downstream portion that is positioned between wall 1166 and end face 1172 (i.e., it is positioned exterior to cyclone chamber 1156).
Upstream portion 1192 of shroud 1184 is provided with a closed end 1196 and a plurality of perforations 1198. Closed end 1196 is preferably spaced from lower wall 1144 and, more preferably from air inlet end 1154 of cyclone chamber 1156 (i.e., it is positioned spaced upwardly form the plane defined by lower wall 1164 of dirt collection chamber 1162). Closed end 1196 is spaced a distance D1 upwardly from the plane defined from lower wall 1164 of dirt collection chamber 1162. Distance D1 may be any suitable distance, such as 1 cm, 1.8 cm, 3 cm, 5 cm or more.
Perforations 1198 are provided only on upstream section 1192 of shroud 1184 in some embodiments. Accordingly, downstream portion 1194 of shroud 1184 may have a continuous outer wall. Accordingly, the air exiting cyclone chamber 1156 enters longitudinal passage 1200 in the interior of shroud 1184 via perforations 1198, which comprise air exit passages from cyclone chamber 1156 into passage 1200.
Perforations 1198 may be provided in any pattern or arrangement and may be of any suitable size. The perforations all may be of the same size or may be of differing sizes. For example, the perforations may have diameters of 1 mm, 2 mm, 3 mm or more. In addition, the perforations may be provided on the entirety of upstream sections 1192 or only a portion thereof. For example, perforations 1198 may terminate a distance D2 downwardly from end face 1172 of cyclone chamber wall 1170. Distance D2 may vary from 0.5 cm to 5 cm. In some embodiments, perforations 1198 may terminate a distance upwardly from end face 1172.
At least one of shroud 1184 and cyclone chamber wall 1170 and, in some embodiments, both of shroud 1184 and cyclone chamber wall 1170 are tapered. As shown in
In addition cyclone chamber wall 1170 tapers outwardly in the downstream direction (e.g., from lower wall 1164 to end face 1172). Cyclone chamber wall 1170 may taper outwardly continuously along its length at a constant angle. Accordingly, cyclone chamber wall 1170 may be conical and increase in diameter towards the second end of dirt collection chamber 1162.
In some embodiments, the annular gap between shroud 1184 and dirt collection chamber 1170 has a distance D3 transverse to the longitudinal axis of cyclone chamber. Distance D3 may be generally constant along the length of upstream portion 1192 of shroud 1184. Accordingly, despite the shroud increasing in diameter in the downstream direction, the annular gap D3 between the shroud and cyclone chamber wall 1170 need not necessarily decrease.
Lid 1176 may optionally comprise one or more filtration members, for example, two filters. For example, lid 1176 may be provided with a sponge filter 1202 and a thin filter (not shown) made of non-woven material, both downstream from opening 1186. The air travels through filter 1202 and the non-woven material filter and exits lid 1176 via outlet 1136.
A schematic air flow diagram is shown in
When it is desired to empty dirt collection chamber 1162, cyclone unit 24 may be removed from cleaning appliance 1110 and lid 1176 removed. The remaining portion of cyclone unit 1124 may then be inverted so that any material collected in dirt collection chamber 1162 may be emptied.
The steam cleaning function of certain cleaning appliance embodiments disclosed herein is exemplified as including an upright steam cleaner 1300. The components and component arrangements described with regard to the embodiment of
In some embodiments, instead of electric water pump 1308, a manually actuable pump may be used to move water from reservoir 1302 to boiler 1312. In such embodiments, the pump may be configured such that movement of a handle 1320 during pushing and pulling of cleaning appliance 1300 actuates the pump. In this manner, the user's motion in moving the cleaning appliance across the floor actuates the pump. A selectively actuable pump lock may be used to prevent operation of a manual pump in some embodiments.
A tilt switch is included in some embodiments as part of controlling the generation of steam. For example, a tilt switch may be positioned within the upright portion of the cleaning appliance and be configured to stop steam generation when the upright portion is oriented substantially vertically. When the upright portion is angled downwardly relative to the cleaning head, that is, when the handle is grasped by the user and tilted for pushing and pulling, the tilt switch changes modes and steam generation is permitted, subject to other control constraints. The tilt switch may have a time delay to prevent rapid on/off cycling due to temporary changes in orientation and/or momentum changes which cause the tilt switch to register a change in tilt. A roll ball tilt switch may be employed, and the tilt switch may be positioned on a printed circuit board within the cleaning appliance, although any suitable type of tilt switch and tilt switch positioning may be used.
According to another aspect of the invention, a perimeter of a suction opening may have a lowered rear edge. A lowered rear edge may enhance the pickup of particles by preventing the particles from passing by the suction opening. For example, as shown in
Distance Q is approximately 4 mm in some embodiments, although other distances may be used, such as distance between 1 mm and 8 mm or distances between 2 mm and 5 mm. This lowered rear edge provides a clearance distance R of approximately 1 mm between suction outlet rear edge 250 and floor 252 in some embodiments. By contrast, a front edge 254 of suction opening 222 does not extend downwardly from recessed surface 220. As floor cleaning head 112 is moved forward across the floor, particles larger than clearance R are prevented from passing by suction opening 222. In the illustrated embodiment, suction opening 222 having lowered rear edge 250 is positioned on the interior of the floor-facing surface, that is, suction opening 222 is surrounded by the floor-facing surface rather than being positioned at a leading edge of floor cleaning head 112. Lowered rear edge 250 may extend to be at an even level with the portions of floor-facing surface 120 which do not include suction channels 204, or lowered rear edge may extend closer to the floor than floor-facing surface 120.
A downwardly extending ridge 260 may be provided at the rear of floor-facing surface 120. Similar to lowered rear edge 250, ridge 260 may help prevent particles from passing by floor cleaning head 112 without being suctioned into suction outlet 222 as the floor cleaning head 112 is moved in a forward direction. Ridge 260 extends downwardly from a rear portion 264 floor-facing surface 120 by approximately 1 mm in some embodiments, although any suitable size may be used. Ridge 260 may extend transversely to a direction of motion of the cleaning appliance, or may extend perpendicularly in some embodiments. For example, if cleaning appliance is configured to primarily travel in the forward and rear directions, ridge 260 may be positioned to extend side-to-side on the cleaning head. In some embodiments, portions of ridge 260 may be oriented at different angles relative to the cleaning head than other portions of ridge 260. Ridge 260 may extend across the entire width of floor-facing surface 120 at rear end 118 of floor cleaning head 112, as shown in
A storage component for holding the cleaning pad and/or the cleaning pad support may be included as part of a cleaning appliance system. The storage component may be attachable to a pole that extends from the user handle. A post, a hook, or other device may be provided to hold the cleaning pad support. The cleaning pad may be rolled or folded and placed in an open or closed tube.
For purposes herein, the term “floor” is meant to include various types of floors, such as hardwood floors, linoleum floors, carpets, and any other floor surface amenable to cleaning. It should be appreciated that aspects of the embodiments disclosed herein may be employed on cleaning appliances which are capable of cleaning surfaces other than floors, such as countertops, walls, ceilings, oven hoods, or other surfaces.
For purposes herein, the terms “connect”, “connected”, “connection”, “attach”, “attached” and “attachment” refer to direct connections and attachments, indirect connections and attachments, and operative connections and attachments.
Having thus described several aspects of at least one embodiment of this invention, it is to be appreciated various alterations, modifications, and improvements will readily occur to those skilled in the art. Such alterations, modifications, and improvements are intended to be part of this disclosure, and are intended to be within the spirit and scope of the invention. Accordingly, the foregoing description and drawings are by way of example only.
