EP4061191A1 - Machine de nettoyage de sol - Google Patents

Machine de nettoyage de sol

Info

Publication number
EP4061191A1
EP4061191A1 EP20821563.2A EP20821563A EP4061191A1 EP 4061191 A1 EP4061191 A1 EP 4061191A1 EP 20821563 A EP20821563 A EP 20821563A EP 4061191 A1 EP4061191 A1 EP 4061191A1
Authority
EP
European Patent Office
Prior art keywords
filter
cylindrical
chamber
fluid flow
floor cleaner
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.)
Withdrawn
Application number
EP20821563.2A
Other languages
German (de)
English (en)
Inventor
Kirti PAULLA
Abhijeet Shrawage
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Techtronic Cordless GP
Original Assignee
Techtronic Cordless GP
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Techtronic Cordless GP filed Critical Techtronic Cordless GP
Publication of EP4061191A1 publication Critical patent/EP4061191A1/fr
Withdrawn legal-status Critical Current

Links

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
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/02—Floor surfacing or polishing machines
    • A47L11/04—Floor surfacing or polishing machines hand-driven
    • A47L11/08—Floor surfacing or polishing machines hand-driven with rotating tools
    • A47L11/085—Floor surfacing or polishing machines hand-driven with rotating tools with supply of cleaning agents
    • 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
    • A47L5/28—Suction cleaners with handles and nozzles fixed on the casings, e.g. wheeled suction cleaners with steering handle
    • 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
    • A47L5/28—Suction cleaners with handles and nozzles fixed on the casings, e.g. wheeled suction cleaners with steering handle
    • A47L5/30—Suction cleaners with handles and nozzles fixed on the casings, e.g. wheeled suction cleaners with steering handle with driven dust-loosening tools, e.g. rotating brushes
    • 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
    • A47L9/12—Dry filters
    • A47L9/127—Dry filters tube- or sleeve-shaped
    • 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
    • A47L9/14—Bags or the like; Rigid filtering receptacles; Attachment of, or closures for, bags or receptacles
    • A47L9/149—Emptying means; Reusable bags
    • 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
    • A47L9/1608—Cyclonic chamber constructions
    • 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
    • A47L9/1616—Multiple arrangement thereof
    • A47L9/1625—Multiple arrangement thereof for series flow
    • A47L9/1633—Concentric cyclones
    • 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
    • A47L9/1616—Multiple arrangement thereof
    • A47L9/1641—Multiple arrangement thereof for parallel flow
    • 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
    • A47L9/1658—Construction of outlets
    • 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
    • A47L9/1658—Construction of outlets
    • A47L9/1666—Construction of outlets with filtering means
    • 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
    • A47L9/20—Means for cleaning filters

Definitions

  • the present invention relates to floor cleaners.
  • a floor cleaner including a fluid flow path extending from a dirty air inlet to a clean air outlet, a fluid flow motor positioned in the fluid flow path, a separator housing, and a cylindrical filter chamber housing a cylindrical filter media.
  • the separator housing includes a separator air inlet in communication with the dirty air inlet and a separator air outlet.
  • the cylindrical filter chamber includes a first end, a second end, and a cylindrical sidewall extending between the first and second ends in a longitudinal direction.
  • the cylindrical filter chamber includes a filter inlet tangential to the cylindrical sidewall and in fluid communication with the separator air outlet.
  • the cylindrical filter media is positioned in the filter chamber.
  • the cylindrical filter media includes an upstream portion and a downstream portion.
  • the upstream portion is spaced from the cylindrical sidewall between the first end and the second end.
  • the downstream portion forms a portion of the fluid flow path upstream of the fluid flow motor.
  • a longitudinal height of the filter inlet is at least 60% of a longitudinal height of the upstream portion of the filter media between the first end and the second end.
  • a floor cleaner including a fluid flow path extending from a dirty air inlet to a clean air outlet, a fluid flow motor positioned in the fluid flow path, a separator housing in the fluid flow path, and a cylindrical filter chamber.
  • the separator housing includes a separator air inlet and a separator air outlet.
  • the cylindrical filter chamber includes a first end, a second end, and a cylindrical sidewall extending between the first and second ends in a longitudinal direction.
  • the cylindrical filter chamber further includes a cylindrical filter media in the fluid flow path downstream of the separator housing and upstream of the fluid flow motor.
  • the cylindrical filter is spaced apart from the cylindrical sidewall by a gap. The length of the gap is less than 30% of a diameter of the cylindrical filter media.
  • the filter chamber includes a filter inlet edge that extends into the filter chamber such that a radial distance between the filter media and the cylindrical sidewall is greater than a radial distance between the filter media and the filter inlet edge.
  • a floor cleaner including a fluid flow path extending from a dirty air inlet to a clean air outlet, a fluid flow motor positioned in the fluid flow path, a separator housing, and a cylindrical filter chamber.
  • the separator housing includes a separator air inlet in communication with the dirty air inlet, a separator air outlet, an upper end, and a lower end.
  • the separator housing further includes a debris collection chamber.
  • a door is coupled to the lower end of the separator housing and is movable from a closed position to an open position to empty the debris collection chamber through the lower end of the housing.
  • the cylindrical filet chamber includes a first end, a second end, and a cylindrical sidewall extending between the first and second ends.
  • the cylindrical filter chamber further includes a cylindrical filter media in the fluid flow path downstream of the separator housing and upstream of the fluid flow motor.
  • the cylindrical sidewall includes a filter inlet that enters the cylindrical sidewall tangentially, communicating the separator housing and the cylindrical filter chamber.
  • the door on the lower end of the separator housing forms the first end of the filter chamber.
  • a floor cleaner including a fluid flow path extending form a dirty air inlet to a clean air outlet, a fluid flow motor positioned in the fluid flow path, a separator housing, and a cylindrical filter chamber housing an annular filter media.
  • the separator housing includes a separator air inlet in communication with the dirty air inlet, and a separator air outlet.
  • the cylindrical filter chamber includes an openable first end, a second end, and a cylindrical sidewall extending between the first and second ends.
  • the second end has a filter chamber air outlet upstream of the fluid flow motor.
  • the filter chamber has a filter inlet tangential to the cylindrical sidewall and in fluid communication with the separator air outlet.
  • the annular filter media is positioned in the filter chamber.
  • the filter media has an upstream portion spaced from the cylindrical sidewall between the first end and the second end, and a downstream portion forming a portion of the fluid flow path in communication with the chamber air outlet.
  • the first end of the filter chamber is formed by a portion of the separator housing and the separator housing is separable from the filter chamber to open the first end of the filter chamber.
  • FIG. 1 is a perspective view of a floor cleaner according to one embodiment.
  • Fig. 2 is a partial cross-sectional view of the separator and dirt collection chamber of the floor cleaner of Fig. 1.
  • Fig. 3 is a cross-sectional view of the filter chamber with the filter media of the floor cleaner of Fig. 1.
  • Fig. 4 is a cross-sectional view of the filter chamber without the filter media of the floor cleaner of Fig. 1.
  • Fig. 5A is a sectional view through the floor cleaner showing the filter chamber of Fig. 4.
  • Fig. 5B is a detail view of the filter chamber inlet of Fig. 5 A.
  • Fig. 6A is a view of the filter frame and the filter media removed from the floor cleaner.
  • Fig. 6B is an exploded view of Fig. 6A showing the filter media removed from the filter frame.
  • Fig. 6C is an alternate embodiment of the filter frame and filter media of Fig. 6A including a top portion covering the filter media.
  • Figs. 1 and 2 illustrate a floor cleaner 10.
  • the floor cleaner 10 includes a fluid flow path from a dirty air inlet 42 to a clean air outlet 11, a fluid flow motor 12, a separator housing 14, and a cylindrical filter chamber 20 containing a filter frame 21 and a filter media 22.
  • the separator housing 14 is positioned in the fluid flow path and includes an air treatment member 15 configured to separate debris from the air flow introduced from the dirty air inlet 42 and in the illustrated embodiment a dirt collection chamber 16 within the separator housing 14. Separated debris is collected in the dirt collecting chamber 16, and air exits the separator housing 14 via a clean air outlet 40 along the fluid flow path.
  • the clean air outlet 40 is fluidly connected to a filter inlet 30 of the filter chamber 20 to further filter the air flow in the fluid flow path. Improvements in filtration efficiency increase floor cleaning performance and service life of the floor cleaner.
  • the filter chamber 20 includes a first end 26, a second end 28, and a cylindrical sidewall 24 extending between the first end 26 and the second end 28 in a longitudinal direction.
  • the filter frame 21 is removably positioned inside the filter chamber 20. In a use position, the filter frame 21 is arranged such that a top portion 31 of the filter frame is adjacent the first end 26 of the filter chamber and a bottom portion 33 of the filter frame is adjacent the second end 28 of the filter chamber.
  • the filter frame 21 is configured to operably support the filter media 22 in the filter chamber 20 and includes an air passageway 55 downstream of the filter media 22 in communication with a filter chamber outlet 54.
  • the filter is cylindrical, and is disposed on the filter frame 21, surrounding or forming a hollow center portion that forms at least a portion of the air passageway 55.
  • the annular filter media 22 forms a filter axis 80 along the air passageway 55.
  • the filter frame 21 may include longitudinal ribs 23 extending between the top portion 31 and the bottom portion 33 providing structure and support around the air passageway.
  • Air enters the filter chamber 20 through the filter inlet 30, which directs air generally tangentially to the cylindrical sidewall 24. Air passes through the filter media 22 filtering debris from the air flow before passing through the air passageway 55 and exiting the filter chamber outlet 54.
  • the fluid flow path extends through the filter media 22 in a normal flow orientation (i.e., the fluid flow move radially inwards) toward the air passageway 55 at the center of the cylindrical filter.
  • an upper side 29a and a lower side 29b of the filter media 22 or filter frame 21 is positioned in sealing engagement with the filter chamber 20 and/or the separator housing 14 configured to direct air from the filter inlet 30 through the filter media 22.
  • the filter media 22 is positioned in the filter chamber 20 configured to inhibit air from passing around the filter media during use.
  • the lower side 29b of the filter media 22 is in sealing engagement with the bottom portion 33 of the filter frame 21 and the bottom portion 33 of the filter frame 21 is in sealing engagement with the second end 28 of the filter chamber 20.
  • the lower side 29b of the filter frame 21 is in sealing engagement with the second end 28 of the filter chamber 20 via a filter frame seal 35.
  • the upper side 29a of the filter and a top of the air passageway 55 are also closed or sealed in order to inhibit air bypassing the filter media 22 and directly entering the air passageway 55.
  • the upper side 29a of the filter and the top of the air passageway 55 may be sealed by the same closure or by separate closures.
  • the top portion 31 of the filter frame closes the top of the air passageway 55 and a bottom side of the separator housing 14 seals the upper side 29a of the filter media 22.
  • the separator housing 14 includes an openable door 18 on the bottom side of the separator housing 14, and the upper side 29a of the filter media 22 is sealed by the openable door 18. When the separator housing 14 is removed, the filter media 22 is accessible for cleaning and service. In one embodiment shown in Fig.
  • the filter frame includes a removable top portion 3G extending over the filter media such that the filter frame seals the upper side 29a of the filter media and closes the top of the air passage way 55 in a use position, configured such that the filter media 22 is accessible for cleaning when the top portion 31 is in a removed position.
  • the bottom side of the separator housing 14 provides a sealing surface to the upper side 29a of the filter media and closes the air passageway 55. When the separator housing 14 is removed, the filter media 22 is accessible to the user and the air passageway 55 is opened.
  • the cylindrical filter chamber 20 and filter 22 are in the fluid flow path downstream from the separator housing 14 and upstream from the fluid flow motor 12.
  • the cylindrical sidewall 24 of the filter chamber 20 extends between the first end 26 and the second end 28.
  • the filter media 22 is positioned in the filter chamber 20, the filter media having an upstream portion 19a and a downstream portion 19b.
  • the upstream portion 19a is spaced from the cylindrical sidewall 24 between the first end 26 and the second end 28, and the downstream portion 19b forms a portion of the fluid flow path upstream of the filter chamber outlet 54 and the fluid flow motor 12.
  • cylindrical filter media 22 is annular, wherein the upstream portion 19a of the cylindrical filter includes the outer cylindrical surface 19a of the filter media and the downstream portion 19b includes the inner annular surface 19b of the filter media 22.
  • the bottom portion 33 of the filter frame has a flange 27 that extends radially beyond the filter media 22 and, optionally, an upwardly directed circumferential wall 37 forming a debris collection area to receive the debris settling from the airflow or dropping from the surface of the filter media 22.
  • the flange 27 and/or the circumferential wall 37 is disposed adjacent the sidewall 24 to collect settling debris.
  • Fig. 1 shows a flange 27 that extends radially beyond the filter media 22 and, optionally, an upwardly directed circumferential wall 37 forming a debris collection area to receive the debris settling from the airflow or dropping from the surface of the filter media 22.
  • the flange 27 and/or the circumferential wall 37 is disposed adjacent the sidewall 24 to collect settling debris.
  • the filter frame 21 includes a wiper or gasket 60 around the bottom portion 33, extending from the flange 27 or the circumferential wall 37 closing a gap between the filter frame 21 and the filter chamber 20.
  • the wiper 60 extends radially contacting the sidewall 24 configured such that when the filter frame 21 is removed from the filter chamber 20, the wiper 60 wipes the cylindrical sidewall 24 to remove excess dirt and debris from the filter chamber 20 and inhibit dirt and debris from entering the fluid flow motor 12.
  • the wiper 60 can be molded from a flexible natural, thermoplastic, or thermoset elastomer material, such as, but not limited to, polymers of polypropylene, rubber, silicone, or polyurethane.
  • the filter media 22 is sealed in the filter chamber 20 at the upper side 29a of the filter media and at the lower side 29b.
  • the bottom side of the separator housing 14 seals the upper side 29a of the filter media.
  • the bottom side of the separator housing includes a downwardly extending protrusion 39 that encircles the upper side 29a of the filter media in sealing engagement.
  • the protrusion 39 also inhibits the filter media 22 from flexing or bowing and allowing air to bypass the media 22.
  • the protrusion 39 engages a top surface of the upper side 29a of the filter media in sealing engagement.
  • the top portion 31 of the filter frame 21 is configured to close the center air passageway 55.
  • the lower side 29b of the filter media is pressed against the filter frame 21 and the compression of the media 22 against the filter frame 21 provides a seal between the media and the frame.
  • the lower wall of the filter chamber 20 includes an upwardly extending protrusion 41 that encircles the lower side 29b of the filter media in sealing engagement.
  • the protrusion 41 also inhibits the filter media 22 from flexing or bowing and allowing air to bypass the media 22.
  • the protrusion 41 engages a bottom surface of the lower side 29b of the filter media in sealing engagement.
  • the filter frame 21 includes the seal 35 on the bottom portion 33 of the filter frame engaging the second end 28 of the filter chamber.
  • the top portion 31 includes a grip or handle portion 25 configured for the user to grasp to remove the filter frame 21 from the filter chamber 20, such as for cleaning or servicing of the assembly.
  • the first end 26 of the filter chamber 20 is located under the separator housing 14 and the dirt collection chamber 16.
  • the dirt collection chamber 16 is separate from the separator housing 14, and the first end 26 of the filter chamber 20 is located under the dirt collection chamber 16.
  • the second end 28 of the filter chamber is located above the fluid flow motor 12 and includes the filter chamber outlet 54 fluidly communicating the downstream portion 19b of the filter with the motor 12.
  • the fluid flow motor 12 extends along a motor axis 82. As shown in Fig 2 the fluid flow motor 12 is positioned such that the motor axis 82 is parallel to the filter axis 80. In one embodiment, the motor axis 82 extends along the filter axis 80. In one embodiment, the motor axis 82 and filter axis 80 are coaxial. In one embodiment, the motor is positioned such that the motor axis is transverse the filter axis.
  • the inlet 30 directs airflow into the filter chamber 20 generally tangentially to the cylindrical sidewall 24.
  • the tangential inlet 30 fluidly communicates the separator housing 14 and the filter chamber 20.
  • an airflow passage 61 extends between the clean air outlet 40 of the separator housing 14 to a filter inlet duct 62 forming the tangential inlet 30 of the filter chamber 20.
  • the tangential inlet 30 is formed by an outlet aperture of the filter inlet duct 62 extending through the sidewall 24.
  • the filter inlet duct 62 includes an inner wall 64 forming an inlet edge 66 of the filter inlet 30, an outer wall 68, a top wall 70 extending to and forming a top edge 50 of the filter inlet, and a bottom wall 72 forming a bottom 52 of the filter inlet.
  • the inner wall 64 extends into the filter chamber such that the radial dimension between the filter media 22 and the sidewall 24 is greater than the radial dimension between the filter media 22 and the inlet edge 66 of the filter inlet.
  • the filter frame 21 and the filter chamber 20 include a mating notch and tab arrangement such that when the filter frame 21 is placed into the filter chamber 20, alignment of the notch and tab will properly orient the filter frame 21 within the filter chamber 20 to thereby align an opening 74 (Fig. 6A) in the circumferential wall 37 of the filter frame 21with the inlet duct 30 (Fig. 5A) of the filter chamber 20.
  • the filter inlet edge 66 extends approximately parallel to the filter media, or within about 10° of parallel.
  • a height of the tangential inlet aperture 30 is increased to be a substantial portion of a height of the filter media 22. This allows a steady stream of air to flow from the inlet 30 into the filter media 22.
  • an inlet height Hi such that it is a substantial portion of a filter media height 3 ⁇ 4
  • the air speed is reduced because the increased inlet height Hi provides a less restrictive air passageway.
  • the reduced air speed entering the filter results in less air bypassing the filter media 22 to enter the air passageway 55 and more air flowing through the filter media 22.
  • the increased air flow through the filter media 22 improves filtration performance.
  • the longitudinal height Hi of the inlet 30 from the top edge 50 to the bottom 52 is a substantial portion of the longitudinal height of the cylindrical filter media 22 exposed to air flow in use H2.
  • the longitudinal height Hi is at least 60% of the longitudinal height H2.
  • the longitudinal height Hi is at least 75% of the longitudinal height H2.
  • the height of the tangential inlet Hi is a substantial portion of a height of the filter chamber 3 ⁇ 4 (Fig. 4). Similar to the height ratio of the inlet 30 relative to the filter media 22, the height ratio of the inlet 30 relative to the filter chamber 20 improves the performance of the filtration system.
  • the height of the filter chamber 3 ⁇ 4 is the same as the height of the filter media exposed to air flow in use 3 ⁇ 4. In another embodiment, the height of the filter media exposed to air flow in use 3 ⁇ 4 is less than the height of the filter chamber 3 ⁇ 4.
  • the height of the tangential inlet Hi is at least 60% a height of the filter chamber 3 ⁇ 4. In one embodiment, the height of the tangential inlet Hi is at least 75% the height of the filter chamber 3 ⁇ 4. In one embodiment, height 3 ⁇ 4 of the filter media exposed to air flow in use is equal to the height of the filter chamber 3 ⁇ 4.
  • the filter chamber 20 is configured to provide a gap 56 between the filter 22 and the cylindrical sidewall 24 of the filter chamber to provide desired air flow around the filter 22. Desired filtration has been achieved with a gap 56 in the range of 5 millimeters to 20 millimeters. In one alternative, the gap 56 between the filter 22 and the adjacent sidewall 24 is between 5 millimeters and 10 millimeters. In another alternative, the gap 56 between the filter 22 and the adjacent sidewall 24 is larger than 5 millimeters to provide desired airflow around the filter 22.
  • the gap 56 between the filter 22 and the cylindrical sidewall 24 of the filter chamber can be measured as a percentage of a cross-sectional diameter of the filter Di. In one embodiment, the gap 56 is less than 30% of the cross-sectional diameter of the filter Di. In an alternate embodiment, the gap 56 between the filter 22 and cylindrical sidewall 24 is less than 15% of the cross-sectional diameter of the filter Di. In another embodiment the gap 56 is between 1% and 25% of the cross-sectional diameter of the filter Di. The gap 56 allows air flow around the cylindrical filter 22. When the gap 56 is too small a percentage of the filter diameter Di, air may tend to overcome the sealing surfaces, and bypass the filter 22. This results in air exiting through the filter chamber outlet 54 without being adequately filtered through the filter media 22.
  • the gap 56 is too large as a percentage of the filter diameter Di, the speed of the air in the filter chamber 20 is more variable than desired.
  • the air speed is lower near the sidewall 24 and higher near the filter 22, resulting in worse overall filtration.
  • We have found desired filtration has been achieved with the gap 56 is in the range of 5% to 30% of the diameter of the filter Di.
  • the gap 56 can also be measured as a ratio of the diameter of the filter Di relative to a diameter of the filter chamber D2.
  • the ratio of the diameter of the filter Di to the diameter of the filter chamber D2 is between 60% and 90%.
  • the ratio of the filter diameter Di to the filter chamber diameter D2 is between 75% and 90%. This ratio ensures substantial constant speed in the filter chamber and low pressure drop as air passes through, which provides high filtration efficiency.
  • the cylindrical filter 22 includes a first cylindrical filter 22a and a second cylindrical filter 22b.
  • the second cylindrical filter 22b is nested within the first cylindrical filter 22a.
  • the height of the first cylindrical filter 22a is greater than the height of the second cylindrical filter 22b.
  • the upper sides 29a of the first and second cylindrical filters 22a, 22b are compressed and sealed as discussed above, such as by the top portion 31 of the filter frame or by the bottom door 18 of the dirt collection chamber.
  • the filter 22 may be any desired filter media, including pleated or non- pleated, non-woven fiber, foam, high-efficiency particular air filter (HEP A), or other media.
  • the first cylindrical filter 22a and the second cylindrical filter 22b may be made of the same material or different material.
  • the tangential inlet 30 to the filter chamber 20 has a longitudinal height Hi from the top edge 50 to the bottom edge 52 that is greater than the width from the inlet duct inner wall 64 to the outer wall 68 at the tangential inlet 30.
  • the height Hi from the top edge 50 to the bottom edge 52 is at least twice the width of the inlet duct from the inner wall 64 to the outer wall 68.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

Un dispositif de nettoyage de sol comprend un trajet d'écoulement de fluide s'étendant d'une entrée d'air sale à une sortie d'air propre, un moteur d'écoulement de fluide, un boîtier de séparateur et une chambre de filtre cylindrique contenant un milieu filtrant cylindrique. La chambre de filtre comprend une entrée de filtre qui pénètre tangentiellement dans la chambre de filtre. L'entrée de filtre a une hauteur longitudinale qui est une partie substantielle de la hauteur de la chambre de filtre et du milieu filtrant.
EP20821563.2A 2019-11-20 2020-11-18 Machine de nettoyage de sol Withdrawn EP4061191A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201962937952P 2019-11-20 2019-11-20
PCT/US2020/061010 WO2021101963A1 (fr) 2019-11-20 2020-11-18 Machine de nettoyage de sol

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EP4061191A1 true EP4061191A1 (fr) 2022-09-28

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EP20821563.2A Withdrawn EP4061191A1 (fr) 2019-11-20 2020-11-18 Machine de nettoyage de sol

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US (1) US20210145230A1 (fr)
EP (1) EP4061191A1 (fr)
CN (1) CN114727729A (fr)
AU (1) AU2020388042A1 (fr)
WO (1) WO2021101963A1 (fr)

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CN115534888B (zh) * 2022-10-13 2026-04-21 武汉水魔方智能科技有限公司 一种适用于车辆清洁工具用水箱装置
JP7500796B1 (ja) 2023-02-10 2024-06-17 東芝ライフスタイル株式会社 集塵装置及び電気掃除機
USD1124547S1 (en) * 2023-06-26 2026-04-28 Sharkninja Operating Llc Surface cleaning device

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CN114727729A (zh) 2022-07-08
WO2021101963A1 (fr) 2021-05-27
AU2020388042A1 (en) 2022-05-26
US20210145230A1 (en) 2021-05-20

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