US20240090716A1 - Vacuum cleaner - Google Patents
Vacuum cleaner Download PDFInfo
- Publication number
- US20240090716A1 US20240090716A1 US18/038,412 US202118038412A US2024090716A1 US 20240090716 A1 US20240090716 A1 US 20240090716A1 US 202118038412 A US202118038412 A US 202118038412A US 2024090716 A1 US2024090716 A1 US 2024090716A1
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- United States
- Prior art keywords
- dirt
- vacuum cleaner
- separator
- cleaning tool
- suction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000004140 cleaning Methods 0.000 claims abstract description 173
- 230000007246 mechanism Effects 0.000 claims abstract description 10
- 238000000926 separation method Methods 0.000 description 55
- 230000008901 benefit Effects 0.000 description 8
- 239000000428 dust Substances 0.000 description 4
- 238000010410 dusting Methods 0.000 description 4
- 241000238631 Hexapoda Species 0.000 description 3
- 238000001914 filtration Methods 0.000 description 2
- 238000010408 sweeping Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000011044 inertial separation Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L5/00—Structural features of suction cleaners
- A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
- A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
- A47L5/225—Convertible suction cleaners, i.e. convertible between different types thereof, e.g. from upright suction cleaners to sledge-type suction cleaners
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L5/00—Structural features of suction cleaners
- A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
- A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
- A47L5/24—Hand-supported suction cleaners
- A47L5/26—Hand-supported suction cleaners with driven dust-loosening tools
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L5/00—Structural features of suction cleaners
- A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
- A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
- A47L5/24—Hand-supported suction cleaners
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/02—Nozzles
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
- A47L9/102—Dust separators
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
- A47L9/16—Arrangement or disposition of cyclones or other devices with centrifugal action
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/24—Hoses or pipes; Hose or pipe couplings
- A47L9/242—Hose or pipe couplings
- A47L9/246—Hose or pipe couplings with electrical connectors
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
- A47L9/2805—Parameters or conditions being sensed
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
- A47L9/2836—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means characterised by the parts which are controlled
- A47L9/2842—Suction motors or blowers
Definitions
- the present invention relates to a vacuum cleaner comprising cleaning tools having different types of dirt separator.
- a vacuum cleaner may include different cleaning tools for performing different cleaning tasks.
- a vacuum cleaner may include a cleaning tool having relatively stiff bristles for removing stubborn dirt from carpeted surfaces, and a further cleaning tool having relatively soft bristles for sweeping dirt from delicate surfaces.
- the present invention provides a vacuum cleaner comprising: a suction unit; a first cleaning tool attachable to the suction unit, the first cleaning tool comprising a first dirt separator; and a second cleaning tool attachable to the suction unit, the second cleaning tool comprising a second dirt separator, wherein the first dirt separator and the second dirt separator employ different mechanisms for separating dirt from an airflow.
- each cleaning tool may comprise a dirt separator that is better suited to the intended cleaning task.
- the first cleaning tool may be used for cleaning large areas, such as floor surfaces, and the first dirt separator may be relatively large with a large dirt capacity.
- the second cleaning tool may be used for spot cleaning (e.g. picking up crumbs or dusting surfaces) and thus the second dirt separator may be relatively small with a small dirt capacity.
- the same dirt separator is used with each cleaning tool.
- the dirt separator may be relatively large, which then makes certain cleaning tasks difficult and cumbersome.
- the dirt separator may be relatively small but then has a relatively poor separation efficiency and/or a small dirt capacity.
- a cleaning tool may be selected having a separation efficiency and/or dirt capacity that is that is best suited to the cleaning task.
- the first cleaning tool may be used for cleaning tasks that require the pickup and separation of both coarse dirt and fine dirt.
- the second cleaning tool may be used for cleaning tasks that require the separation of only coarse dirt or fine dirt.
- Each of the cleaning tools may comprise a suction inlet through which dirt from a surface is drawn into the vacuum cleaner.
- each cleaning tool is capable of both picking up dirt from a surface and then separating the dirt from the airflow.
- At least one of the cleaning tools may comprise a first suction nozzle attachable to the dirt separator, and a second, different suction nozzle attachable to the dirt separator.
- the second cleaning tool may be used for spot cleaning and the second dirt separator may have a relatively small dirt capacity.
- the second cleaning tool may then have different suction nozzles for the different spot cleaning tasks.
- the second cleaning tool may comprise a first suction nozzle have stiff bristles for removing stubborn dirt from carpeted surfaces, and a second suction nozzle having soft bristles for sweeping dust from delicate surfaces.
- the first cleaning tool may comprise one or more first dirt-dislodging elements for dislodging dirt from a surface to be cleaned
- the second cleaning tool may comprise one or more second, different dirt-dislodging elements.
- the dirt-dislodging elements may comprise, for example, bristles, lint pickers, felt or rubber strips.
- the performance of each cleaning tool may be better suited to different cleaning tasks.
- the first cleaning tool may comprise relatively stiff bristles for removing dirt from floor surfaces
- the second cleaning tool may comprise relatively soft bristles from removing dust from delicate surfaces.
- At least one of the cleaning tools may comprise an agitator moveable to agitate a surface to be cleaned, and a drive assembly for driving the agitator. This then has the advantage that the vacuum cleaner has at least one cleaning tool that is well suited at removing dirt from carpeted surfaces.
- Each dirt separator may comprise a dirt collection chamber for collecting dirt separated by the dirt separator. This then has the advantage that each cleaning tool forms a standalone unit. As a result, when the dirt collection chamber of the first cleaning tool is full, a user is not required to empty the dirt collection chamber in order to continue cleaning. Instead, the user can switch to the second cleaning tool in order to continue cleaning.
- the first dirt separator may be a cyclonic separator
- the second dirt separator is a non-cyclonic separator
- the second dirt separator may comprise at least one of a filter, a mesh screen, an inertial separator, a gravitational separator, and a rotating body that throws dirt into a dirt collection chamber.
- a cyclonic separator has the advantage that it is capable of removing both coarse dirt and fine dirt at relatively high separation efficiencies. However, the pressure drop across a cyclonic separator may be high. By employing a non-cyclonic separator in the second cleaning tool, a higher level of suction may be achieved at the suction inlet at the expense of separation efficiency.
- the vacuum cleaner may comprise a third cleaning tool attachable to the suction unit.
- the third cleaning tool then comprises a third dirt separator, and the first, second and third dirt separators employ different mechanisms for separating dirt from an airflow.
- the provision of a third cleaning tool having a dirt separator that is different to that of the first and second cleaning tools further increases the flexibility of the vacuum cleaner, making different cleaning tasks easier still.
- the suction unit may comprise a suction motor and at least one of the cleaning tools may comprise an electric motor.
- the electric motor may be used to drive a brushbar or other agitator of the cleaning tool.
- the electric motor may be used to drive a rotating body of the dirt separator, such as a perforated disc.
- the suction unit may comprise a suction motor which operates at a first power when the first cleaning tool is attached to the suction unit, and at a second, different power when the second cleaning tool is attached to the suction unit.
- a suction motor which operates at a first power when the first cleaning tool is attached to the suction unit, and at a second, different power when the second cleaning tool is attached to the suction unit.
- the second cleaning tool is able to achieve the same level of suction (at the suction inlet) as the first cleaning tool by operating the suction motor at lower power.
- any improvements in energy efficiency may extend the runtime of the vacuum cleaner.
- the suction unit may form a handle of the vacuum cleaner. As a result, a relatively compact and lightweight vacuum cleaner may be achieved.
- the suction unit may be cylindrical in shape. This the has the advantage that the suction unit provides a convenient shape for the user to grip.
- the suction unit may comprise a suction motor and a battery pack housed within a body. This then has the advantage that cleaning tasks may be performed more easily. For example, there is no power cord that might otherwise hinder or restrict movement of the vacuum cleaner or restrict where the vacuum cleaner can used.
- FIG. 1 illustrates a vacuum cleaner in accordance with the present invention
- FIG. 2 illustrates a first cleaning tool of the vacuum cleaner
- FIG. 3 illustrates a second cleaning tool of the vacuum cleaner
- FIG. 4 illustrates a third cleaning tool of the vacuum cleaner
- FIG. 5 illustrates a fourth cleaning tool of the vacuum cleaner
- FIG. 6 illustrates four different suction nozzles forming part of the cleaning tool of FIG. 5 ;
- FIG. 7 illustrates a fifth cleaning tool of the vacuum cleaner
- FIG. 8 illustrates a sixth cleaning tool of the vacuum cleaner
- FIG. 9 illustrates a vacuum cleaner comprising a seventh cleaning tool.
- the vacuum cleaner 10 of FIG. 1 comprises a suction unit 20 , which is removably attachable to one of a plurality of cleaning tools 30 .
- the suction unit 20 comprises a suction motor 21 and a battery pack 22 housed within a body 23 .
- the battery pack 22 is coupled to and supplies electrical power to the suction motor 21 .
- the body 23 comprises an inlet 24 through which an airflow is drawn into the suction unit 20 by the suction motor 21 , and an outlet 25 (in the form of a plurality of openings) through which the airflow is discharged from the suction unit 20 .
- the suction unit 20 further comprises a power button 26 and a mode button 27 .
- the power button 26 is used to power on and off the suction unit 20 and thus the vacuum cleaner 10
- the mode button 27 is used to select different modes of operation, such as low and high suction.
- the suction unit 20 is removably attachable to each cleaning tool 30 of the vacuum cleaner 10 .
- the suction unit 20 may comprise a first part 28 of a catch mechanism, provided at an end of the body 23 , and each of the cleaning tools 30 may comprise a second part 38 of the catch mechanism.
- the suction unit 20 may also comprise electrical terminals 29 at the end of the body 23 for supplying electrical power from the battery pack 22 to a cleaning tool 30 attached to the suction unit 20 .
- the suction unit 20 is cylindrical in shape and forms a handle of the vacuum cleaner 10 .
- a user grips and manipulates the suction unit 20 in order to manoeuvre the attached cleaning tool 30 over a surface to be cleaned.
- FIG. 2 shows a first cleaning tool 100 of the vacuum cleaner 10 .
- the first cleaning tool 100 comprises a suction nozzle 110 , a dirt separator 120 , and an outlet duct 130 .
- the suction nozzle 110 comprises a duct 111 having a suction inlet 112 at one end.
- the duct 111 is attached to the dirt separator 120 at the opposite end and provides an airflow path from the suction inlet 112 to the dirt separator 120 .
- the dirt separator 120 is a gravitational separator and comprises a separation chamber 121 having an inlet 122 and an outlet 123 , and a dirt collection chamber located 124 below the separation chamber 121 .
- the dirt separator 120 further comprises a mesh screen 125 located upstream of the outlet 123 . Dirt-laden air enters the separation chamber 121 via the inlet 122 and is drawn towards the outlet 123 . Dirt entrained in the air collides with the mesh screen 125 , whereupon the dirt loses its momentum and falls under the force of gravity into the dirt collection chamber 124 . The cleansed air then passes though the mesh screen 124 and exits the separator 120 .
- the dirt separator 120 comprises a hinged base 126 , which can be opened to remove dirt collected within the dirt collection chamber 124 .
- the outlet duct 130 is attached at one end to the dirt separator 120 , and is removably attachable to the suction unit 20 at an opposite end.
- the outlet duct 130 provides an airflow path from the outlet 123 of the dirt separator 120 to the inlet 24 of the suction unit 20 .
- the suction nozzle 110 of the cleaning tool 100 is placed onto or near a surface to be cleaned. Where the cleaning surface is a carpeted surface or an upholstered surface, the suction nozzle 110 may be moved against the surface in order to agitate and dislodge dirt from the surface.
- Suction generated by the suction unit 20 causes dirt-laden air to be drawn into the cleaning tool 100 via the suction inlet 112 .
- the dirt-laden air is carried along the duct 111 of the suction nozzle 110 to the dirt separator 120 . Dirt entrained in the air is then separated by the dirt separator 120 and collects in the dirt collection chamber 124 , whilst the cleansed air is drawn into the suction unit 20 via the outlet duct 130 .
- FIG. 3 shows a second cleaning tool 200 of the vacuum cleaner 10 .
- the second cleaning tool 200 comprises a suction nozzle 210 , a dirt separator 220 , and an outlet duct 230 .
- the suction nozzle 210 comprises a duct 211 and a dusting brush 215 .
- the duct 211 bends through 90 degrees and comprises a suction inlet 212 at one end, and is removably attached to the outlet duct 230 at the opposite end.
- the dusting brush 215 is attached to the duct 211 via spokes 217 and comprises a plurality of bristles 216 that extend beyond the suction inlet 212 .
- the dirt separator 220 is a filter and comprises a filter medium 221 , a frame 222 , an end cap 223 and a seal 224 .
- the filter medium 221 forms a hollow tube that is held open at one end by the frame 222 , and is closed at an opposite end by the end cap 223 .
- the frame 222 comprises a disc-shaped body 225 having a central opening, and a tab 227 attached to the body 225 by spokes 228 .
- the seal 224 is provided around the outside of the body 225 of the frame 222 .
- the dirt separator 220 is removably positioned within the duct 211 of the suction nozzle 210 . When positioned within the duct 211 , the seal 224 creates a seal between the frame 222 of the dirt separator 220 and the duct 211 of the suction nozzle 210 .
- the outlet duct 230 is removably attached at one end to the duct 211 of the suction nozzle 210 , and is removably attachable to the suction unit 20 at an opposite end.
- the dusting brush 215 is swept across a surface to be cleaned, causing dirt to be dislodged from the surface.
- Suction generated by the suction unit 20 causes the dislodged dirt to be drawn into the cleaning tool 200 via the suction inlet 212 .
- the dirt-laden air is then carried along the duct 211 of the suction nozzle 210 to the dirt separator 220 .
- the dirt-laden air is then drawn through the filter medium 221 of the dirt separator 220 , causing dirt to be separated from the air and retained by the filter medium 221 .
- the cleansed air is then drawn through the central opening in the frame 222 of the dirt separator 220 and into the suction unit 20 via the outlet duct 230 .
- the outlet duct 230 is first detached from the suction nozzle 210 .
- the dirt separator 220 is then removed from the suction nozzle 210 by grasping and pulling the tab 227 .
- FIG. 4 shows a third cleaning tool 300 of the vacuum cleaner 10 .
- the third cleaning tool 300 comprises a suction nozzle 310 , a dirt separator 320 , and an outlet duct 330 .
- the suction nozzle 310 comprises a housing 311 , a suction inlet 312 , a brushbar assembly 314 , and a duct 315 .
- the housing 311 defines a chamber 316 within which the brushbar assembly 314 is mounted.
- the suction inlet 312 is provided on an underside of the housing 311 , and the duct 315 extends rearwardly from the housing 311 and provides an airflow path from the suction inlet 312 to the dirt separator 320 .
- the brushbar assembly 314 comprises a brushbar 340 rotatably mounted to the housing 311 , and a drive assembly 345 for driving the brushbar 340 .
- the brushbar 340 comprises a cylindrical body 341 that surrounds the drive assembly 345 and to which are secured bristles 342 , flicker strips, or other means for agitating and dislodging dirt from a surface to be cleaned.
- the drive assembly 345 comprises an electric motor 346 and a transmission (not shown) for transmitting torque generated by the electric motor 346 to the brushbar 340 .
- the electric motor 346 is powered by electrical power supplied by the battery pack 22 of the suction unit 20 .
- the drive assembly 345 is located inside the brushbar 340 .
- the drive assembly 345 may be located outside of the brushbar 340 .
- the drive assembly 345 may comprise alternative means, such as an air turbine, for generating the torque necessary to drive the brushbar 340 .
- the dirt separator 320 is an inertial separator and comprises a separation chamber 321 having an inlet 322 and an outlet 323 , and a dirt collection chamber 324 .
- the dirt separator 320 further comprises a separation wall 325 and a mesh screen 326 .
- Dirt-laden air enters the separation chamber 321 via the inlet 322 .
- the dirt-laden air turns through 90 degrees and follows a path parallel to the separation wall 325 .
- the air Upon passing the end of the separation wall 325 , the air turns through 180 degrees and follows a path parallel to the separation wall 325 but in an opposite direction. Relatively heavy dirt entrained in the air is unable to match the turn taken by the air due to its greater inertia and instead continues along a straighter path.
- the dirt collects in the dirt collection chamber 324 whilst the cleansed air exits the separator 320 via the outlet 323 .
- the mesh screen 326 extends from an end of the separation wall 325 to an outer wall of the dirt separator 320 . The air turning through 180 degrees passes through the mesh screen 326 before exiting the separator 320 .
- the mesh screen 326 therefore acts to protect the suction unit 20 by ensuring that dirt of a certain size is prevented from inadvertently exiting the separation chamber 321 .
- An outer wall of the dirt separator chamber 320 may be arranged to hinge or slide in order to remove dirt collected within the dirt collection chamber 324 .
- the outlet duct 330 is attached at one end to the dirt separator 320 , and is removably attachable to the suction unit 20 at an opposite end.
- the outlet duct 330 provides an airflow path from the outlet 323 of the dirt separator 320 to the inlet 24 of the suction unit 20 .
- the suction nozzle 310 is placed onto the surface to be cleaned.
- the cleaning tool 300 is intended primarily for use on a carpeted surface, where the brushbar 340 acts to beat or agitate the piles of the carpet in order to better release trapped dirt.
- Suction generated by the suction unit 20 causes dirt-laden air to be drawn into the cleaning tool 300 via the suction inlet 312 .
- the dirt-laden air is carried along the duct 311 of the suction nozzle 310 to the dirt separator 320 . Dirt entrained in the air is then separated by the dirt separator 320 and collects in the dirt collection chamber 324 , whilst the cleansed air is drawn into the suction unit 20 via the outlet duct 330 .
- FIG. 5 shows a fourth cleaning tool 400 of the vacuum cleaner 10 .
- the fourth cleaning tool 400 comprises a dirt separator 420 , and an outlet duct 430 .
- the cleaning tool 400 also comprises a plurality of suction nozzles, such as those shown in FIG. 6 . Each of the suction nozzles is removably attachable to the dirt separator 420 .
- the dirt separator 420 is a cyclonic separator and comprises a separation chamber 421 having an inlet 422 and an outlet 423 , a dirt collection chamber 424 located below the separation chamber 421 , and a mesh screen 425 . Dirt-laden air enters the separation chamber 421 tangentially via the inlet 422 . The dirt-laden air then spirals around the separation chamber 421 , causing dirt to be separated from the air. The cleansed air passes through the mesh screen 425 and exits the separator 420 via the outlet 423 , whilst the separated dirt collects in the dirt collection chamber 424 .
- the dirt separator 420 comprises a hinged base 426 , which can be opened to remove the dirt collected in the dirt collection chamber 424 .
- the cleaning tool 400 comprises a plurality of suction nozzles, each of which is removably attachable to the dirt separator 420 .
- FIG. 6 illustrates four suction nozzles 410 a - 410 d .
- Each of the suction nozzles 410 a - 410 d comprises a suction inlet through which dirt-laden air is drawn into the suction nozzle, and a duct for carrying the dirt-laden air from the suction inlet to the dirt separator.
- the first suction nozzle 410 a ( FIG. 6 a ) comprises a plurality of relatively stiff bristles 415 a that surround the suction inlet.
- the first suction nozzle 410 a is intended for use in removing stubborn or trapped dirt from carpeted surfaces, upholstery and the like.
- the second suction nozzle 410 b ( FIG. 6 b ) comprises a plurality of relative soft bristles 415 b , which again surround the suction inlet.
- the second suction nozzle 410 b is intended to sweep and lift dust from delicate surfaces.
- the third suction nozzle 410 c ( FIG. 6 c ) comprises a relatively narrow, elongate duct 411 c and is intended for use in removing dirt from crevices and other hard-to-reach places.
- the fourth suction nozzle 410 d ( FIG. 6 d ) is similar to the suction nozzle 310 of the cleaning tool 300 of FIG.
- the brushbar 440 d comprises a cylindrical body to which alternate narrow and wide strips of bristles 442 d , 443 d are attached. Each narrow strip comprises relatively long carbon fibre bristles 442 d . Each wide strip comprises relatively short, soft nylon bristles 443 d formed as a dense pile.
- the fourth suction nozzle 440 d is intended to be used on hard floors, such as wooden, stone or tiled floors. As the brushbar 440 d rotates, the short bristles 443 d are crushed between the body of the brushbar 440 d and the floor to create an effective seal between the brushbar 440 d and the floor. As a result, higher airflow speeds may be achieved which in turn entrain more of the dirt.
- the long bristles 442 d flex on contacting the surface and act to sweep dirt up into the suction nozzle 410 d.
- FIG. 7 shows a fifth cleaning tool 500 of the vacuum cleaner 10 .
- the fifth cleaning tool 500 comprises a dirt separator 520 , and an outlet duct 530 .
- the fifth cleaning tool 500 comprises a plurality of suction nozzles, such as those shown in FIG. 6 , which are removably attachable to the dirt separator 520 .
- the dirt separator 520 is an inertial separator similar in many respects to that of FIG. 4 .
- the dirt separator 520 comprises a separation chamber 521 having an inlet 522 and an outlet 523 , and a dirt collection chamber 524 located below the separation chamber 521 .
- the dirt separator 520 further comprises a separation duct 525 located within the separation chamber 521 , and a mesh screen 526 provided at one end of the separation duct 521 .
- Dirt-laden air enters the separation chamber 521 via the inlet 522 .
- the dirt-laden air moves downwards along a path parallel to the separation duct 521 .
- the air Upon passing the end of the separation duct 521 , the air turns through 180 degrees and enters the separation duct 521 .
- Relatively heavy dirt entrained in the air is unable to match the turn taken by the air due to its greater inertia and instead continues along a downward path and into the dirt collection chamber 524 .
- the cleansed air then moves upward through the separation duct 521 and exits the separator 520 via the air outlet 523 .
- the mesh screen 526 acts to protect the suction unit 20 by ensuring that dirt of a certain size is prevented from inadvertently exiting the separation chamber 521 .
- FIG. 8 shows a sixth cleaning tool 600 of the vacuum cleaner 10 .
- the sixth cleaning tool 600 comprises a dirt separator 620 , and an outlet duct 630 .
- the sixth cleaning tool 600 comprises a plurality of suction nozzles, such as those shown in FIG. 6 , which are removably attachable to the dirt separator 620 .
- the dirt separator 620 comprises a separation chamber 621 , an inlet duct 622 , a disc assembly 623 , and a dirt collection chamber 624 located beneath the separation chamber 621 .
- the inlet duct 622 extends within the separation chamber 621 and terminates a short distance from the disc assembly 623 .
- One end of the inlet duct 622 defines an inlet to the separation chamber 621 .
- the opposite end of the inlet duct 622 is attachable to a suction nozzle.
- the disc assembly 623 comprises a disc 625 driven by an electric motor 626 .
- the disc 625 comprises a central non-perforated region surrounded by a perforated region.
- the disc 625 is located at and covers an outlet of the separation chamber 621 .
- Dirt-laden air enters the separation chamber 621 via the inlet duct 622 and is directed at the centre of the disc 625 .
- the central non-perforated region of the disc 625 causes the dirt-laden air to turn and move radially outward (i.e. in a direction normal to the rotational axis).
- the rotating disc 625 imparts tangential forces to the dirt-laden air, causing the air to swirl.
- the tangential forces imparted to the dirt and air increase.
- the air Upon reaching the perforated region of the disc, the air is drawn through the perforations in the disc. This requires a further turn in the direction of the air.
- the dirt separator 620 comprises a hinged base 628 , which can be opened to remove the dirt collected within the dirt collection chamber 624 .
- FIG. 9 shows the suction unit 20 attached to a seventh cleaning tool 700 .
- the seventh cleaning tool 700 comprise a suction nozzle 710 , a tubular wand 740 , a dirt separator 720 and an outlet duct 730 .
- the suction nozzle 710 is similar to that of FIGS. 4 and 7 ( d ) and comprises a housing, a suction inlet, a brushbar, and a duct.
- the suction inlet is provided on an underside of the housing, the brushbar is rotatable mounted within the housing, and the duct extends rearwardly from the housing and provides an airflow path from the suction inlet to the tubular wand 740 .
- the tubular wand 740 is removably attached at one end to the suction nozzle 710 , and at the opposite end to the dirt separator 720 .
- the wand 740 provides an airflow path from the suction nozzle 710 to the dirt separator 720 .
- the dirt separator 720 is a cyclonic separator of the type described in GB2569820A and comprises a first separation stage and a second separation stage located downstream of the first separation stage. Each separation stage comprise a separation chamber for separating dirt from an airflow using cyclonic action, and a dirt collection chamber for collecting the separated dirt.
- the outlet duct 730 is attached at one end to the dirt separator 720 , and is removably attached to the suction unit 20 at an opposite end.
- the outlet duct provides an airflow path from an outlet of the dirt separator 720 to the inlet 24 of the suction unit 20 .
- a user grips and manipulates the suction unit 20 in order to the manoeuvre the suction nozzle 710 over a surface to be cleaned.
- the provision of the tubular wand 740 enables the vacuum cleaner 10 to be used by a user in a standing position.
- the tubular wand 740 may be removed and the dirt separator 720 may be attached to the suction nozzle 710 in order to achieve a more compact arrangement.
- the suction nozzle 710 may be changed, perhaps for one of the suction nozzles shown in FIG. 6 .
- the dirt separator 720 may be attached to the suction nozzle 710 , and the tubular wand 740 may be attached at one end to the dirt separator 720 and at the opposite end to the suction unit 20 .
- the dirt separator 720 is moved further from the suction unit 20 .
- This has the advantage of reducing the weight in the hand of the user.
- a potential disadvantage of this arrangement is that the dirt separator 720 may impede or restrict movement of the suction nozzle 710 around or under furniture.
- the suction unit may be attached to cleaning tools having different dirt separators.
- cleaning tasks may be made easier.
- the vacuum cleaner of FIG. 9 may be used to clean floor surfaces.
- the suction unit may be detached from the cleaning tool 700 of FIG. 9 and attached to the cleaning tool 100 of FIG. 2 .
- the relatively large and heavy dirt separator 720 of the cleaning tool of FIG. 9 may be discarded in favour of the small and light dirt separator 120 of the cleaning tool of FIG. 2 .
- the suction unit may be detached from the cleaning tool 700 of FIG. 9 and attached to the cleaning tool 300 of FIG. 2 .
- the same dirt separator must be used with each cleaning tool.
- the dirt separator is often relatively large, which makes certain cleaning tasks more difficult and cumbersome.
- the dirt separator may be relatively small but then has a relatively poor separation efficiency.
- a cleaning tool may be selected having a separation efficiency that is that is best suited to the cleaning task.
- the cleaning tool 700 of FIG. 9 may be used for cleaning tasks that require the pickup and separation of both coarse dirt and fine dirt.
- the cleaning tool 100 of FIG. 2 may be used for cleaning tasks that require the separation of coarse dirt only, whilst the cleaning tool 200 of FIG. 3 may be used for cleaning tasks that require the separation of fine dirt only.
- the vacuum cleaner of the present invention may be realised with the vacuum cleaner of the present invention.
- dirt-laden air spins at relatively high speeds within the separation chamber. Consequently, if the vacuum cleaner were used to catch an insect for subsequent release, there is a strong likelihood that the insect will be injured or killed.
- the dirt separator 120 of the cleaning tool 100 of FIG. 2 is less aggressive and may be used to catch the insect without injury.
- the runtime of the vacuum cleaner may be increased.
- different cleaning tools may require different levels of suction at the suction inlet in order to best perform the intended cleaning task.
- the suction motor may instead operate at different electrical powers according to the cleaning tool that is attached.
- savings in electrical power may be achieved.
- the pressure drop across each dirt separator is likely to be different.
- the pressure drop across the dirt separator 720 of FIG. 9 which has two stages of cyclonic separation, is likely to be significantly higher than that across the dirt separator of FIG. 2 .
- the suction motor operates at a given electrical power in order to achieve a given level of suction at the suction inlet.
- the same level of suction may be achieved by operating the suction motor at a lower electrical power. So again, savings in electrical power may be achieved.
- Changes in the electrical power drawn by the suction motor 21 may be controlled by the user using the mode button 27 . So, for example, upon switching from the cleaning tool 700 of FIG. 9 to the cleaning tool 100 of FIG. 2 , the user may select a lower power for the suction motor 21 using the mode button 27 .
- the suction unit 20 may automatically control the electrical power drawn by the suction motor 21 according the type of cleaning tool that is attached. In particular, the suction motor 21 may operate at a first power when a first cleaning tool (e.g. 700 ) is attached to the suction unit 20 , and the suction motor 21 may operate at a second, different power when a second cleaning tool (e.g. 100 ) is attached to the suction unit 20 .
- the cleaning tools described above are provided by way of example only.
- the vacuum cleaner may comprise additional and/or alternative cleaning tools, so long as at least two cleaning tools are provided that have different dirt separators.
- the vacuum cleaner may be said to comprise a suction unit to which are attachable a first cleaning tool and a second cleaning.
- the first cleaning tool comprises a first dirt separator
- the second cleaning tool comprises a second dirt separator
- the first dirt separator and the second dirt separator employ different types of separation. That is to say that the first dirt separator and the second dirt separator employ different mechanisms for separating dirt from an airflow.
- a filter medium which separates dirt primarily by impaction, interception and diffusion
- a cyclonic separator which separates dirt primarily by centrifugal forces).
- Each dirt separator may employ more than one type of separation.
- dirt is first removed by inertial separation. Additional dirt of a certain size is then removed by the mesh screen 526 , which employs surface filtration in order to remove the dirt.
- the dirt separator 400 of FIG. 5 may further comprise a filter medium for filtering the air after passing through the mesh screen 425 . Consequently, the first dirt separator and the second dirt separator may employ more than one type of separation.
- the two separators may employ a type of separation that is common to both separators. Nevertheless, the first dirt separator employs at least one type of separation that differs from that employed by the second dirt separator, i.e. the first dirt separator employs at least one mechanism for removing dirt that differs from that of the second dirt separator.
- the cleaning tools may comprise different features or elements for dislodging dirt from a surface to be cleaned.
- some of the suction nozzles comprise dirt-dislodging elements in the form of bristles.
- the bristles then vary in type, lengths and/or stiffnesses.
- the cleaning tools may comprise additional and/or alternative types of dirt-dislodging elements, such as lint pickers, felt strips, and rubber strips. By providing cleaning tools with different dirt-dislodging elements, the performance of each cleaning tool may be better suited to different cleaning tasks.
- the dirt-dislodging elements may be static or they may form part of a brushbar or other agitator that moves to agitate the cleaning surface.
- the suction unit comprises a battery pack that supplies electrical power to the suction motor.
- the battery pack may be omitted and the suction motor may instead be powered by mains electricity.
- the provision of a battery pack has the advantage that cleaning tasks may be performed more easily. For example, there is no power cord that might otherwise hinder or restrict movement of the vacuum cleaner or restrict where the vacuum cleaner can used.
Abstract
A vacuum cleaner is described having a suction unit, a first cleaning tool, and a second cleaning tool. The first cleaning tool is attachable to the suction unit and includes a first dirt separator. The second cleaning tool is likewise attachable to the suction unit and includes a second dirt separator. The first dirt separator and the second dirt separator employ different mechanisms for separating dirt from an airflow.
Description
- The present invention relates to a vacuum cleaner comprising cleaning tools having different types of dirt separator.
- A vacuum cleaner may include different cleaning tools for performing different cleaning tasks. For example, a vacuum cleaner may include a cleaning tool having relatively stiff bristles for removing stubborn dirt from carpeted surfaces, and a further cleaning tool having relatively soft bristles for sweeping dirt from delicate surfaces.
- The present invention provides a vacuum cleaner comprising: a suction unit; a first cleaning tool attachable to the suction unit, the first cleaning tool comprising a first dirt separator; and a second cleaning tool attachable to the suction unit, the second cleaning tool comprising a second dirt separator, wherein the first dirt separator and the second dirt separator employ different mechanisms for separating dirt from an airflow.
- By providing a vacuum cleaner that comprises cleaning tools having different dirt separators, cleaning tasks may be made easier. In particular, each cleaning tool may comprise a dirt separator that is better suited to the intended cleaning task. For example, the first cleaning tool may be used for cleaning large areas, such as floor surfaces, and the first dirt separator may be relatively large with a large dirt capacity. The second cleaning tool, on the other hand, may be used for spot cleaning (e.g. picking up crumbs or dusting surfaces) and thus the second dirt separator may be relatively small with a small dirt capacity. By employing a smaller and lighter dirt separator in the second cleaning tool, the task of spot cleaning is made easier.
- With existing vacuum cleaners, the same dirt separator is used with each cleaning tool. The dirt separator may be relatively large, which then makes certain cleaning tasks difficult and cumbersome. Alternatively, the dirt separator may be relatively small but then has a relatively poor separation efficiency and/or a small dirt capacity.
- With the vacuum cleaner of the present invention, cleaning tasks may be made easier whilst also achieving a good overall cleaning performance. In particular, a cleaning tool may be selected having a separation efficiency and/or dirt capacity that is that is best suited to the cleaning task. For example, the first cleaning tool may be used for cleaning tasks that require the pickup and separation of both coarse dirt and fine dirt. The second cleaning tool, on the other hand, may be used for cleaning tasks that require the separation of only coarse dirt or fine dirt.
- Each of the cleaning tools may comprise a suction inlet through which dirt from a surface is drawn into the vacuum cleaner. As a result, each cleaning tool is capable of both picking up dirt from a surface and then separating the dirt from the airflow.
- At least one of the cleaning tools may comprise a first suction nozzle attachable to the dirt separator, and a second, different suction nozzle attachable to the dirt separator. This then further increases the flexibility of the vacuum cleaner, making cleaning tasks easier still. For example, the second cleaning tool may be used for spot cleaning and the second dirt separator may have a relatively small dirt capacity. The second cleaning tool may then have different suction nozzles for the different spot cleaning tasks. For example, the second cleaning tool may comprise a first suction nozzle have stiff bristles for removing stubborn dirt from carpeted surfaces, and a second suction nozzle having soft bristles for sweeping dust from delicate surfaces.
- The first cleaning tool may comprise one or more first dirt-dislodging elements for dislodging dirt from a surface to be cleaned, and the second cleaning tool may comprise one or more second, different dirt-dislodging elements. The dirt-dislodging elements may comprise, for example, bristles, lint pickers, felt or rubber strips. By providing cleaning tools with different dirt-dislodging elements, the performance of each cleaning tool may be better suited to different cleaning tasks. For example, the first cleaning tool may comprise relatively stiff bristles for removing dirt from floor surfaces, and the second cleaning tool may comprise relatively soft bristles from removing dust from delicate surfaces.
- At least one of the cleaning tools may comprise an agitator moveable to agitate a surface to be cleaned, and a drive assembly for driving the agitator. This then has the advantage that the vacuum cleaner has at least one cleaning tool that is well suited at removing dirt from carpeted surfaces.
- Each dirt separator may comprise a dirt collection chamber for collecting dirt separated by the dirt separator. This then has the advantage that each cleaning tool forms a standalone unit. As a result, when the dirt collection chamber of the first cleaning tool is full, a user is not required to empty the dirt collection chamber in order to continue cleaning. Instead, the user can switch to the second cleaning tool in order to continue cleaning.
- The first dirt separator may be a cyclonic separator, and the second dirt separator is a non-cyclonic separator. Moreover, the second dirt separator may comprise at least one of a filter, a mesh screen, an inertial separator, a gravitational separator, and a rotating body that throws dirt into a dirt collection chamber. A cyclonic separator has the advantage that it is capable of removing both coarse dirt and fine dirt at relatively high separation efficiencies. However, the pressure drop across a cyclonic separator may be high. By employing a non-cyclonic separator in the second cleaning tool, a higher level of suction may be achieved at the suction inlet at the expense of separation efficiency.
- The vacuum cleaner may comprise a third cleaning tool attachable to the suction unit. The third cleaning tool then comprises a third dirt separator, and the first, second and third dirt separators employ different mechanisms for separating dirt from an airflow. The provision of a third cleaning tool having a dirt separator that is different to that of the first and second cleaning tools further increases the flexibility of the vacuum cleaner, making different cleaning tasks easier still.
- The suction unit may comprise a suction motor and at least one of the cleaning tools may comprise an electric motor. The electric motor may be used to drive a brushbar or other agitator of the cleaning tool. Alternatively, the electric motor may be used to drive a rotating body of the dirt separator, such as a perforated disc.
- The suction unit may comprise a suction motor which operates at a first power when the first cleaning tool is attached to the suction unit, and at a second, different power when the second cleaning tool is attached to the suction unit. As a result, improvements in the energy efficiency of the vacuum cleaner may be achieved. For example, for the cleaning task that the second cleaning tool is intended to perform, a lower level of suction at the suction inlet may be sufficient or indeed desired. As a result, the suction motor may operate at a lower power when the second cleaning tool is attached. Alternatively, the second dirt separator may have a lower pressure drop than the first dirt separator. As a result, the second cleaning tool is able to achieve the same level of suction (at the suction inlet) as the first cleaning tool by operating the suction motor at lower power. Where the vacuum cleaner is battery operated, any improvements in energy efficiency may extend the runtime of the vacuum cleaner.
- The suction unit may form a handle of the vacuum cleaner. As a result, a relatively compact and lightweight vacuum cleaner may be achieved.
- The suction unit may be cylindrical in shape. This the has the advantage that the suction unit provides a convenient shape for the user to grip.
- The suction unit may comprise a suction motor and a battery pack housed within a body. This then has the advantage that cleaning tasks may be performed more easily. For example, there is no power cord that might otherwise hinder or restrict movement of the vacuum cleaner or restrict where the vacuum cleaner can used.
- Embodiments of the present invention will now be described, by way of example, with reference to the accompanying drawings in which:
-
FIG. 1 illustrates a vacuum cleaner in accordance with the present invention; -
FIG. 2 illustrates a first cleaning tool of the vacuum cleaner; -
FIG. 3 illustrates a second cleaning tool of the vacuum cleaner; -
FIG. 4 illustrates a third cleaning tool of the vacuum cleaner; -
FIG. 5 illustrates a fourth cleaning tool of the vacuum cleaner; -
FIG. 6 illustrates four different suction nozzles forming part of the cleaning tool ofFIG. 5 ; -
FIG. 7 illustrates a fifth cleaning tool of the vacuum cleaner; -
FIG. 8 illustrates a sixth cleaning tool of the vacuum cleaner; and -
FIG. 9 illustrates a vacuum cleaner comprising a seventh cleaning tool. - The
vacuum cleaner 10 ofFIG. 1 comprises asuction unit 20, which is removably attachable to one of a plurality ofcleaning tools 30. - The
suction unit 20 comprises asuction motor 21 and abattery pack 22 housed within abody 23. Thebattery pack 22 is coupled to and supplies electrical power to thesuction motor 21. Thebody 23 comprises aninlet 24 through which an airflow is drawn into thesuction unit 20 by thesuction motor 21, and an outlet 25 (in the form of a plurality of openings) through which the airflow is discharged from thesuction unit 20. Thesuction unit 20 further comprises apower button 26 and amode button 27. Thepower button 26 is used to power on and off thesuction unit 20 and thus thevacuum cleaner 10, whilst themode button 27 is used to select different modes of operation, such as low and high suction. - The
suction unit 20 is removably attachable to eachcleaning tool 30 of thevacuum cleaner 10. For example, thesuction unit 20 may comprise afirst part 28 of a catch mechanism, provided at an end of thebody 23, and each of thecleaning tools 30 may comprise asecond part 38 of the catch mechanism. Thesuction unit 20 may also compriseelectrical terminals 29 at the end of thebody 23 for supplying electrical power from thebattery pack 22 to acleaning tool 30 attached to thesuction unit 20. - The
suction unit 20 is cylindrical in shape and forms a handle of thevacuum cleaner 10. A user grips and manipulates thesuction unit 20 in order to manoeuvre the attachedcleaning tool 30 over a surface to be cleaned. -
FIG. 2 shows afirst cleaning tool 100 of thevacuum cleaner 10. Thefirst cleaning tool 100 comprises asuction nozzle 110, adirt separator 120, and anoutlet duct 130. - The
suction nozzle 110 comprises aduct 111 having asuction inlet 112 at one end. Theduct 111 is attached to thedirt separator 120 at the opposite end and provides an airflow path from thesuction inlet 112 to thedirt separator 120. - The
dirt separator 120 is a gravitational separator and comprises aseparation chamber 121 having aninlet 122 and anoutlet 123, and a dirt collection chamber located 124 below theseparation chamber 121. Thedirt separator 120 further comprises amesh screen 125 located upstream of theoutlet 123. Dirt-laden air enters theseparation chamber 121 via theinlet 122 and is drawn towards theoutlet 123. Dirt entrained in the air collides with themesh screen 125, whereupon the dirt loses its momentum and falls under the force of gravity into thedirt collection chamber 124. The cleansed air then passes though themesh screen 124 and exits theseparator 120. Thedirt separator 120 comprises a hingedbase 126, which can be opened to remove dirt collected within thedirt collection chamber 124. - The
outlet duct 130 is attached at one end to thedirt separator 120, and is removably attachable to thesuction unit 20 at an opposite end. Theoutlet duct 130 provides an airflow path from theoutlet 123 of thedirt separator 120 to theinlet 24 of thesuction unit 20. - During use of the
vacuum cleaner 10, thesuction nozzle 110 of thecleaning tool 100 is placed onto or near a surface to be cleaned. Where the cleaning surface is a carpeted surface or an upholstered surface, thesuction nozzle 110 may be moved against the surface in order to agitate and dislodge dirt from the surface. Suction generated by thesuction unit 20 causes dirt-laden air to be drawn into thecleaning tool 100 via thesuction inlet 112. The dirt-laden air is carried along theduct 111 of thesuction nozzle 110 to thedirt separator 120. Dirt entrained in the air is then separated by thedirt separator 120 and collects in thedirt collection chamber 124, whilst the cleansed air is drawn into thesuction unit 20 via theoutlet duct 130. -
FIG. 3 shows asecond cleaning tool 200 of thevacuum cleaner 10. Thesecond cleaning tool 200 comprises asuction nozzle 210, adirt separator 220, and anoutlet duct 230. - The
suction nozzle 210 comprises aduct 211 and a dustingbrush 215. Theduct 211 bends through 90 degrees and comprises a suction inlet 212 at one end, and is removably attached to theoutlet duct 230 at the opposite end. The dustingbrush 215 is attached to theduct 211 viaspokes 217 and comprises a plurality ofbristles 216 that extend beyond the suction inlet 212. - The
dirt separator 220 is a filter and comprises afilter medium 221, aframe 222, anend cap 223 and aseal 224. Thefilter medium 221 forms a hollow tube that is held open at one end by theframe 222, and is closed at an opposite end by theend cap 223. Theframe 222 comprises a disc-shapedbody 225 having a central opening, and atab 227 attached to thebody 225 byspokes 228. Theseal 224 is provided around the outside of thebody 225 of theframe 222. Thedirt separator 220 is removably positioned within theduct 211 of thesuction nozzle 210. When positioned within theduct 211, theseal 224 creates a seal between theframe 222 of thedirt separator 220 and theduct 211 of thesuction nozzle 210. - The
outlet duct 230 is removably attached at one end to theduct 211 of thesuction nozzle 210, and is removably attachable to thesuction unit 20 at an opposite end. - During use of the
vacuum cleaner 10, the dustingbrush 215 is swept across a surface to be cleaned, causing dirt to be dislodged from the surface. Suction generated by thesuction unit 20 causes the dislodged dirt to be drawn into thecleaning tool 200 via the suction inlet 212. The dirt-laden air is then carried along theduct 211 of thesuction nozzle 210 to thedirt separator 220. The dirt-laden air is then drawn through thefilter medium 221 of thedirt separator 220, causing dirt to be separated from the air and retained by thefilter medium 221. The cleansed air is then drawn through the central opening in theframe 222 of thedirt separator 220 and into thesuction unit 20 via theoutlet duct 230. In order to remove and clean thedirt separator 220, theoutlet duct 230 is first detached from thesuction nozzle 210. Thedirt separator 220 is then removed from thesuction nozzle 210 by grasping and pulling thetab 227. -
FIG. 4 shows athird cleaning tool 300 of thevacuum cleaner 10. Thethird cleaning tool 300 comprises asuction nozzle 310, adirt separator 320, and anoutlet duct 330. - The
suction nozzle 310 comprises ahousing 311, asuction inlet 312, abrushbar assembly 314, and aduct 315. Thehousing 311 defines a chamber 316 within which thebrushbar assembly 314 is mounted. Thesuction inlet 312 is provided on an underside of thehousing 311, and theduct 315 extends rearwardly from thehousing 311 and provides an airflow path from thesuction inlet 312 to thedirt separator 320. - The
brushbar assembly 314 comprises abrushbar 340 rotatably mounted to thehousing 311, and adrive assembly 345 for driving thebrushbar 340. Thebrushbar 340 comprises acylindrical body 341 that surrounds thedrive assembly 345 and to which are securedbristles 342, flicker strips, or other means for agitating and dislodging dirt from a surface to be cleaned. Thedrive assembly 345 comprises anelectric motor 346 and a transmission (not shown) for transmitting torque generated by theelectric motor 346 to thebrushbar 340. Theelectric motor 346 is powered by electrical power supplied by thebattery pack 22 of thesuction unit 20. In the embodiment shown inFIG. 4 , thedrive assembly 345 is located inside thebrushbar 340. Alternatively, thedrive assembly 345 may be located outside of thebrushbar 340. Moreover, rather than anelectric motor 346, thedrive assembly 345 may comprise alternative means, such as an air turbine, for generating the torque necessary to drive thebrushbar 340. - The
dirt separator 320 is an inertial separator and comprises aseparation chamber 321 having aninlet 322 and anoutlet 323, and adirt collection chamber 324. Thedirt separator 320 further comprises aseparation wall 325 and amesh screen 326. Dirt-laden air enters theseparation chamber 321 via theinlet 322. The dirt-laden air turns through 90 degrees and follows a path parallel to theseparation wall 325. Upon passing the end of theseparation wall 325, the air turns through 180 degrees and follows a path parallel to theseparation wall 325 but in an opposite direction. Relatively heavy dirt entrained in the air is unable to match the turn taken by the air due to its greater inertia and instead continues along a straighter path. The dirt collects in thedirt collection chamber 324 whilst the cleansed air exits theseparator 320 via theoutlet 323. Themesh screen 326 extends from an end of theseparation wall 325 to an outer wall of thedirt separator 320. The air turning through 180 degrees passes through themesh screen 326 before exiting theseparator 320. Themesh screen 326 therefore acts to protect thesuction unit 20 by ensuring that dirt of a certain size is prevented from inadvertently exiting theseparation chamber 321. An outer wall of thedirt separator chamber 320 may be arranged to hinge or slide in order to remove dirt collected within thedirt collection chamber 324. - The
outlet duct 330 is attached at one end to thedirt separator 320, and is removably attachable to thesuction unit 20 at an opposite end. Theoutlet duct 330 provides an airflow path from theoutlet 323 of thedirt separator 320 to theinlet 24 of thesuction unit 20. - During use of the
vacuum cleaner 10, thesuction nozzle 310 is placed onto the surface to be cleaned. Thecleaning tool 300 is intended primarily for use on a carpeted surface, where thebrushbar 340 acts to beat or agitate the piles of the carpet in order to better release trapped dirt. Suction generated by thesuction unit 20 causes dirt-laden air to be drawn into thecleaning tool 300 via thesuction inlet 312. The dirt-laden air is carried along theduct 311 of thesuction nozzle 310 to thedirt separator 320. Dirt entrained in the air is then separated by thedirt separator 320 and collects in thedirt collection chamber 324, whilst the cleansed air is drawn into thesuction unit 20 via theoutlet duct 330. -
FIG. 5 shows afourth cleaning tool 400 of thevacuum cleaner 10. Thefourth cleaning tool 400 comprises adirt separator 420, and anoutlet duct 430. Thecleaning tool 400 also comprises a plurality of suction nozzles, such as those shown inFIG. 6 . Each of the suction nozzles is removably attachable to thedirt separator 420. - The
dirt separator 420 is a cyclonic separator and comprises aseparation chamber 421 having aninlet 422 and anoutlet 423, adirt collection chamber 424 located below theseparation chamber 421, and amesh screen 425. Dirt-laden air enters theseparation chamber 421 tangentially via theinlet 422. The dirt-laden air then spirals around theseparation chamber 421, causing dirt to be separated from the air. The cleansed air passes through themesh screen 425 and exits theseparator 420 via theoutlet 423, whilst the separated dirt collects in thedirt collection chamber 424. Again, thedirt separator 420 comprises a hingedbase 426, which can be opened to remove the dirt collected in thedirt collection chamber 424. - The
cleaning tool 400 comprises a plurality of suction nozzles, each of which is removably attachable to thedirt separator 420. By way of example,FIG. 6 illustrates four suction nozzles 410 a-410 d. Each of the suction nozzles 410 a-410 d comprises a suction inlet through which dirt-laden air is drawn into the suction nozzle, and a duct for carrying the dirt-laden air from the suction inlet to the dirt separator. Thefirst suction nozzle 410 a (FIG. 6 a ) comprises a plurality of relativelystiff bristles 415 a that surround the suction inlet. Thefirst suction nozzle 410 a is intended for use in removing stubborn or trapped dirt from carpeted surfaces, upholstery and the like. Thesecond suction nozzle 410 b (FIG. 6 b ) comprises a plurality of relativesoft bristles 415 b, which again surround the suction inlet. Thesecond suction nozzle 410 b is intended to sweep and lift dust from delicate surfaces. Thethird suction nozzle 410 c (FIG. 6 c ) comprises a relatively narrow, elongate duct 411 c and is intended for use in removing dirt from crevices and other hard-to-reach places. Thefourth suction nozzle 410 d (FIG. 6 d ) is similar to thesuction nozzle 310 of thecleaning tool 300 ofFIG. 4 and comprises arotatable brushbar 440 d. Thebrushbar 440 d comprises a cylindrical body to which alternate narrow and wide strips ofbristles 442 d,443 d are attached. Each narrow strip comprises relatively long carbon fibre bristles 442 d. Each wide strip comprises relatively short, soft nylon bristles 443 d formed as a dense pile. Thefourth suction nozzle 440 d is intended to be used on hard floors, such as wooden, stone or tiled floors. As thebrushbar 440 d rotates, the short bristles 443 d are crushed between the body of thebrushbar 440 d and the floor to create an effective seal between the brushbar 440 d and the floor. As a result, higher airflow speeds may be achieved which in turn entrain more of the dirt. Thelong bristles 442 d flex on contacting the surface and act to sweep dirt up into thesuction nozzle 410 d. -
FIG. 7 shows afifth cleaning tool 500 of thevacuum cleaner 10. Thefifth cleaning tool 500 comprises adirt separator 520, and an outlet duct 530. Like the fourth cleaning tool ofFIG. 5 , thefifth cleaning tool 500 comprises a plurality of suction nozzles, such as those shown inFIG. 6 , which are removably attachable to thedirt separator 520. - The
dirt separator 520 is an inertial separator similar in many respects to that ofFIG. 4 . Thedirt separator 520 comprises aseparation chamber 521 having aninlet 522 and anoutlet 523, and adirt collection chamber 524 located below theseparation chamber 521. Thedirt separator 520 further comprises aseparation duct 525 located within theseparation chamber 521, and amesh screen 526 provided at one end of theseparation duct 521. Dirt-laden air enters theseparation chamber 521 via theinlet 522. The dirt-laden air moves downwards along a path parallel to theseparation duct 521. Upon passing the end of theseparation duct 521, the air turns through 180 degrees and enters theseparation duct 521. Relatively heavy dirt entrained in the air is unable to match the turn taken by the air due to its greater inertia and instead continues along a downward path and into thedirt collection chamber 524. The cleansed air then moves upward through theseparation duct 521 and exits theseparator 520 via theair outlet 523. Themesh screen 526 acts to protect thesuction unit 20 by ensuring that dirt of a certain size is prevented from inadvertently exiting theseparation chamber 521. -
FIG. 8 shows asixth cleaning tool 600 of thevacuum cleaner 10. Thesixth cleaning tool 600 comprises adirt separator 620, and anoutlet duct 630. Again, as with the fourth and fifth cleaning tools ofFIGS. 5 and 7 , thesixth cleaning tool 600 comprises a plurality of suction nozzles, such as those shown inFIG. 6 , which are removably attachable to thedirt separator 620. - The
dirt separator 620 comprises aseparation chamber 621, aninlet duct 622, adisc assembly 623, and adirt collection chamber 624 located beneath theseparation chamber 621. Theinlet duct 622 extends within theseparation chamber 621 and terminates a short distance from thedisc assembly 623. One end of theinlet duct 622 defines an inlet to theseparation chamber 621. The opposite end of theinlet duct 622 is attachable to a suction nozzle. Thedisc assembly 623 comprises adisc 625 driven by anelectric motor 626. Thedisc 625 comprises a central non-perforated region surrounded by a perforated region. Thedisc 625 is located at and covers an outlet of theseparation chamber 621. Dirt-laden air enters theseparation chamber 621 via theinlet duct 622 and is directed at the centre of thedisc 625. The central non-perforated region of thedisc 625 causes the dirt-laden air to turn and move radially outward (i.e. in a direction normal to the rotational axis). Therotating disc 625 imparts tangential forces to the dirt-laden air, causing the air to swirl. As the dirt-laden air moves radially outward over the surface of thedisc 625, the tangential forces imparted to the dirt and air increase. Upon reaching the perforated region of the disc, the air is drawn through the perforations in the disc. This requires a further turn in the direction of the air. Relatively heavy dirt entrained in the air is unable to match the turn of the air due to its greater inertia. As a result, rather than being drawn through the perforations in thedisc 625, the dirt continues to move radially outwards and falls into thedirt collection chamber 624 located below. Again, thedirt separator 620 comprises a hingedbase 628, which can be opened to remove the dirt collected within thedirt collection chamber 624. -
FIG. 9 shows thesuction unit 20 attached to aseventh cleaning tool 700. Theseventh cleaning tool 700 comprise asuction nozzle 710, atubular wand 740, adirt separator 720 and anoutlet duct 730. - The
suction nozzle 710 is similar to that ofFIGS. 4 and 7 (d) and comprises a housing, a suction inlet, a brushbar, and a duct. The suction inlet is provided on an underside of the housing, the brushbar is rotatable mounted within the housing, and the duct extends rearwardly from the housing and provides an airflow path from the suction inlet to thetubular wand 740. - The
tubular wand 740 is removably attached at one end to thesuction nozzle 710, and at the opposite end to thedirt separator 720. Thewand 740 provides an airflow path from thesuction nozzle 710 to thedirt separator 720. - The
dirt separator 720 is a cyclonic separator of the type described in GB2569820A and comprises a first separation stage and a second separation stage located downstream of the first separation stage. Each separation stage comprise a separation chamber for separating dirt from an airflow using cyclonic action, and a dirt collection chamber for collecting the separated dirt. - The
outlet duct 730 is attached at one end to thedirt separator 720, and is removably attached to thesuction unit 20 at an opposite end. The outlet duct provides an airflow path from an outlet of thedirt separator 720 to theinlet 24 of thesuction unit 20. - During use of the
vacuum cleaner 10, a user grips and manipulates thesuction unit 20 in order to the manoeuvre thesuction nozzle 710 over a surface to be cleaned. The provision of thetubular wand 740 enables thevacuum cleaner 10 to be used by a user in a standing position. - Different configurations are possible with the
vacuum cleaner 10 ofFIG. 9 . For example, thetubular wand 740 may be removed and thedirt separator 720 may be attached to thesuction nozzle 710 in order to achieve a more compact arrangement. Thesuction nozzle 710 may be changed, perhaps for one of the suction nozzles shown inFIG. 6 . Furthermore, thedirt separator 720 may be attached to thesuction nozzle 710, and thetubular wand 740 may be attached at one end to thedirt separator 720 and at the opposite end to thesuction unit 20. As a result, thedirt separator 720 is moved further from thesuction unit 20. This then has the advantage of reducing the weight in the hand of the user. However, a potential disadvantage of this arrangement is that thedirt separator 720 may impede or restrict movement of thesuction nozzle 710 around or under furniture. - With the vacuum cleaner of the present invention, the suction unit may be attached to cleaning tools having different dirt separators. As a result, cleaning tasks may be made easier. For example, the vacuum cleaner of
FIG. 9 may be used to clean floor surfaces. When the vacuum cleaner is subsequently used to clean, say, crumbs from a kitchen worktop, the suction unit may be detached from thecleaning tool 700 ofFIG. 9 and attached to thecleaning tool 100 ofFIG. 2 . This then makes the cleaning task easier for the user. In particular, the relatively large andheavy dirt separator 720 of the cleaning tool ofFIG. 9 may be discarded in favour of the small andlight dirt separator 120 of the cleaning tool ofFIG. 2 . Similarly, when the vacuum cleaner ofFIG. 9 is subsequently used to clean dust from delicate surfaces, the suction unit may be detached from thecleaning tool 700 ofFIG. 9 and attached to thecleaning tool 300 ofFIG. 2 . - With existing vacuum cleaners, the same dirt separator must be used with each cleaning tool. The dirt separator is often relatively large, which makes certain cleaning tasks more difficult and cumbersome. Alternatively, the dirt separator may be relatively small but then has a relatively poor separation efficiency.
- With the vacuum cleaner of the present invention, cleaning tasks may be made easier whilst also achieving a good overall cleaning performance. In particular, a cleaning tool may be selected having a separation efficiency that is that is best suited to the cleaning task. For example, the
cleaning tool 700 ofFIG. 9 may be used for cleaning tasks that require the pickup and separation of both coarse dirt and fine dirt. Thecleaning tool 100 ofFIG. 2 may be used for cleaning tasks that require the separation of coarse dirt only, whilst thecleaning tool 200 ofFIG. 3 may be used for cleaning tasks that require the separation of fine dirt only. - Other benefits may be realised with the vacuum cleaner of the present invention. For example, with the
dirt separator 720 of thecleaning tool 700 ofFIG. 9 , dirt-laden air spins at relatively high speeds within the separation chamber. Consequently, if the vacuum cleaner were used to catch an insect for subsequent release, there is a strong likelihood that the insect will be injured or killed. By contrast, thedirt separator 120 of thecleaning tool 100 ofFIG. 2 is less aggressive and may be used to catch the insect without injury. - Energy efficiencies may be achieved with the vacuum cleaner of the present invention. As a result, the runtime of the vacuum cleaner may be increased. For example, different cleaning tools may require different levels of suction at the suction inlet in order to best perform the intended cleaning task. Rather than operating the suction motor at a single, relatively high power, the suction motor may instead operate at different electrical powers according to the cleaning tool that is attached. As a result, savings in electrical power may be achieved. In a further example, the pressure drop across each dirt separator is likely to be different. For example, the pressure drop across the
dirt separator 720 ofFIG. 9 , which has two stages of cyclonic separation, is likely to be significantly higher than that across the dirt separator ofFIG. 2 . When using the cleaning tool ofFIG. 9 , the suction motor operates at a given electrical power in order to achieve a given level of suction at the suction inlet. When using the cleaning tool ofFIG. 2 , the same level of suction may be achieved by operating the suction motor at a lower electrical power. So again, savings in electrical power may be achieved. - Changes in the electrical power drawn by the
suction motor 21 may be controlled by the user using themode button 27. So, for example, upon switching from thecleaning tool 700 ofFIG. 9 to thecleaning tool 100 ofFIG. 2 , the user may select a lower power for thesuction motor 21 using themode button 27. Alternatively, thesuction unit 20 may automatically control the electrical power drawn by thesuction motor 21 according the type of cleaning tool that is attached. In particular, thesuction motor 21 may operate at a first power when a first cleaning tool (e.g. 700) is attached to thesuction unit 20, and thesuction motor 21 may operate at a second, different power when a second cleaning tool (e.g. 100) is attached to thesuction unit 20. - The cleaning tools described above are provided by way of example only. The vacuum cleaner may comprise additional and/or alternative cleaning tools, so long as at least two cleaning tools are provided that have different dirt separators. Accordingly, in a more general sense, the vacuum cleaner may be said to comprise a suction unit to which are attachable a first cleaning tool and a second cleaning. The first cleaning tool comprises a first dirt separator, the second cleaning tool comprises a second dirt separator, and the first dirt separator and the second dirt separator employ different types of separation. That is to say that the first dirt separator and the second dirt separator employ different mechanisms for separating dirt from an airflow. So, for example, a filter medium (which separates dirt primarily by impaction, interception and diffusion) employs very different mechanism to, say, a cyclonic separator (which separates dirt primarily by centrifugal forces).
- Each dirt separator may employ more than one type of separation. For example, with the
dirt separator 500 ofFIG. 7 , dirt is first removed by inertial separation. Additional dirt of a certain size is then removed by themesh screen 526, which employs surface filtration in order to remove the dirt. As a further example, thedirt separator 400 ofFIG. 5 may further comprise a filter medium for filtering the air after passing through themesh screen 425. Consequently, the first dirt separator and the second dirt separator may employ more than one type of separation. Moreover, the two separators may employ a type of separation that is common to both separators. Nevertheless, the first dirt separator employs at least one type of separation that differs from that employed by the second dirt separator, i.e. the first dirt separator employs at least one mechanism for removing dirt that differs from that of the second dirt separator. - As well as having different dirt separators, the cleaning tools may comprise different features or elements for dislodging dirt from a surface to be cleaned. In the embodiments described above, some of the suction nozzles comprise dirt-dislodging elements in the form of bristles. The bristles then vary in type, lengths and/or stiffnesses. The cleaning tools may comprise additional and/or alternative types of dirt-dislodging elements, such as lint pickers, felt strips, and rubber strips. By providing cleaning tools with different dirt-dislodging elements, the performance of each cleaning tool may be better suited to different cleaning tasks. The dirt-dislodging elements may be static or they may form part of a brushbar or other agitator that moves to agitate the cleaning surface.
- In the embodiments described above, the suction unit comprises a battery pack that supplies electrical power to the suction motor. Conceivably, the battery pack may be omitted and the suction motor may instead be powered by mains electricity. However, the provision of a battery pack has the advantage that cleaning tasks may be performed more easily. For example, there is no power cord that might otherwise hinder or restrict movement of the vacuum cleaner or restrict where the vacuum cleaner can used.
Claims (14)
1. A vacuum cleaner comprising:
a suction unit;
a first cleaning tool attachable to the suction unit, the first cleaning tool comprising a first dirt separator; and
a second cleaning tool attachable to the suction unit, the second cleaning tool comprising a second dirt separator,
wherein the first dirt separator and the second dirt separator employ different mechanisms for separating dirt from an airflow.
2. The vacuum cleaner as claimed in claim 1 , wherein each of the cleaning tools comprises a suction inlet through which dirt from a surface is drawn into the vacuum cleaner.
3. The vacuum cleaner as claimed in claim 1 , wherein at least one of the cleaning tools comprises a first suction nozzle attachable to the dirt separator, and a second, different suction nozzle attachable to the dirt separator.
4. The vacuum cleaner as claimed in claim 1 , wherein the first cleaning tool comprises one or more first dirt-dislodging elements for dislodging dirt from a surface to be cleaned, and the second cleaning tool comprises one or more second, different dirt-dislodging elements.
5. The vacuum cleaner as claimed in claim 1 , wherein at least one of the cleaning tools comprises an agitator moveable to agitate a surface to be cleaned, and a drive assembly for driving the agitator.
6. The vacuum cleaner as claimed in claim 1 , wherein each dirt separator comprises a dirt collection chamber for collecting dirt separated by the dirt separator.
7. The vacuum cleaner as claimed in claim 1 , wherein the first dirt separator is a cyclonic separator, and the second dirt separator is a non-cyclonic separator.
8. The vacuum cleaner as claimed in claim 1 , wherein the second dirt separator comprises at least one of a filter, a mesh screen, an inertial separator, a gravitational separator, and a rotating body that throws dirt into a dirt collection chamber.
9. The vacuum cleaner as claimed in claim 1 , wherein the vacuum cleaner comprises a third cleaning tool attachable to the suction unit, the third cleaning tool comprises a third dirt separator, and the first, second and third dirt separators employ different mechanisms for separating dirt from an airflow.
10. The vacuum cleaner as claimed in claim 1 , wherein the suction unit comprises a suction motor and at least one of the cleaning tools comprises an electric motor.
11. The vacuum cleaner as claimed in claim 1 , wherein the suction unit comprises a suction motor, and the suction motor operates at a first power when the first cleaning tool is attached to the suction unit, and the suction motor operates at a second, different power when the second cleaning tool is attached to the suction unit.
12. The vacuum cleaner as claimed in claim 1 , wherein the suction unit forms a handle of the vacuum cleaner.
13. The vacuum cleaner as claimed in claim 12 , wherein the suction unit is cylindrical in shape.
14. The vacuum cleaner as claimed in claim 1 , wherein the suction unit comprises a suction motor and a battery pack housed within a body.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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GB2019483.3A GB2601788B (en) | 2020-12-10 | 2020-12-10 | Vacuum cleaner |
GB2019483.3 | 2020-12-10 | ||
PCT/GB2021/053140 WO2022123217A1 (en) | 2020-12-10 | 2021-12-01 | Vacuum cleaner |
Publications (1)
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US20240090716A1 true US20240090716A1 (en) | 2024-03-21 |
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Application Number | Title | Priority Date | Filing Date |
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US18/038,412 Pending US20240090716A1 (en) | 2020-12-10 | 2021-12-01 | Vacuum cleaner |
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US (1) | US20240090716A1 (en) |
CN (1) | CN116723784A (en) |
GB (1) | GB2601788B (en) |
WO (1) | WO2022123217A1 (en) |
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GB2620272A (en) * | 2022-06-29 | 2024-01-03 | Dyson Technology Ltd | Vacuum cleaner |
Family Cites Families (13)
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NL6710948A (en) * | 1966-08-10 | 1968-02-12 | Eck Bruno Dr Ing | |
US4542557A (en) * | 1984-03-07 | 1985-09-24 | Cic Int'l. Corp. | Wet-dry vacuum cleaner |
KR20080102647A (en) * | 2007-05-21 | 2008-11-26 | 삼성광주전자 주식회사 | Cyclone dust-separating unit for use in a vacuum cleaner |
KR100861231B1 (en) * | 2007-11-16 | 2008-10-01 | (주)월스타 | Vacuum cleaner inhalation nozzle for dust and tick cleaning |
WO2009145491A2 (en) * | 2008-04-05 | 2009-12-03 | (주)월스타 | Vacuum cleaner suction nozzle provided with a dust receptacle |
GB2523675B (en) * | 2015-04-27 | 2016-01-20 | Alan Graham Burr | Vacuum cleaner envelope |
US20200046186A1 (en) * | 2017-03-28 | 2020-02-13 | Terramera, Inc. | Cleaning apparatus for removing pests and methods of using same |
JP2019097872A (en) * | 2017-12-01 | 2019-06-24 | 株式会社マキタ | Cyclone unit |
GB2569820B (en) | 2017-12-30 | 2020-07-08 | Dyson Technology Ltd | A cleaning appliance |
US20190328190A1 (en) * | 2018-04-25 | 2019-10-31 | Tennant Company | High performance handheld liquid suction device |
CN110638370A (en) * | 2019-09-30 | 2020-01-03 | 北京众清科技有限公司 | Portable dust collector and operation method thereof |
EP3841939A1 (en) * | 2019-12-23 | 2021-06-30 | Koninklijke Philips N.V. | A wet and dry vacuum cleaner |
CN212066605U (en) * | 2020-04-24 | 2020-12-04 | 苏州莱智得电器科技有限公司 | Three-in-one mini handheld dust collector |
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2020
- 2020-12-10 GB GB2019483.3A patent/GB2601788B/en active Active
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- 2021-12-01 US US18/038,412 patent/US20240090716A1/en active Pending
- 2021-12-01 CN CN202180082012.1A patent/CN116723784A/en active Pending
- 2021-12-01 WO PCT/GB2021/053140 patent/WO2022123217A1/en active Application Filing
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WO2022123217A1 (en) | 2022-06-16 |
CN116723784A (en) | 2023-09-08 |
GB2601788B (en) | 2023-08-16 |
GB2601788A (en) | 2022-06-15 |
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