WO2020014782A1 - Appareil de nettoyage de surface - Google Patents

Appareil de nettoyage de surface Download PDF

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Publication number
WO2020014782A1
WO2020014782A1 PCT/CA2019/050984 CA2019050984W WO2020014782A1 WO 2020014782 A1 WO2020014782 A1 WO 2020014782A1 CA 2019050984 W CA2019050984 W CA 2019050984W WO 2020014782 A1 WO2020014782 A1 WO 2020014782A1
Authority
WO
WIPO (PCT)
Prior art keywords
cyclone
airflow passage
cyclone chamber
air inlet
surface cleaning
Prior art date
Application number
PCT/CA2019/050984
Other languages
English (en)
Inventor
Wayne Ernest Conrad
Original Assignee
Omachron Intellectual Property Inc.
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
Priority claimed from US16/039,875 external-priority patent/US10791896B2/en
Priority claimed from US16/039,962 external-priority patent/US10806317B2/en
Application filed by Omachron Intellectual Property Inc. filed Critical Omachron Intellectual Property Inc.
Publication of WO2020014782A1 publication Critical patent/WO2020014782A1/fr

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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
    • A47L5/24—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
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/16—Arrangement or disposition of cyclones or other devices with centrifugal action
    • A47L9/165—Construction of inlets

Definitions

  • This disclosure relates generally to surface cleaning apparatus such as hand vacuum cleaners, upright vacuum cleansers, stick vacuum cleaners or canister vacuum cleaners, and in particular surface cleaning apparatus with multi-inlet cyclone chambers.
  • Various types of surface cleaning apparatus are known, including upright surface cleaning apparatus, canister surface cleaning apparatus, stick surface cleaning apparatus, central vacuum systems, and hand carriable surface cleaning apparatus such as hand vacuums. Further, various designs for cyclonic surface cleaning apparatus are known in the art, including cyclonic hand vacuum cleaners.
  • Cyclones may have an axial inlet or a tangential inlet. Further a cyclone may have multiple inlets which are fed by a single chamber. See for example US2018/0177363.
  • a surface cleaning apparatus is provided with a cyclone chamber that operates as an air treatment member. Dirty air enters the cyclone chamber, and dirt and debris is separated from the air as it flows through the cyclone chamber.
  • the height of air bands entering the cyclone chamber is dictated by the height of the inlets to the cyclone chamber.
  • the taller the cyclone inlets, the taller the cyclone chamber must be to provide the desired number of revolutions. For example, if a cyclone air inlet were 1 inch tall, the cyclone chamber would have to be 4-4.5 inches to allow 4 complete rotations of the air band entering the cyclone chamber. If the inlet were 2 inches tall, the cyclone chamber would have to be 8-9 inches tall to allow 4 complete revolutions.
  • the height of the cyclone inlet is also dictated by the volume of air drawn into the surface cleaning apparatus.
  • the cyclone inlet should be large enough to accommodate the volume of air drawn into the surface cleaning apparatus.
  • the cross-sectional area of the cyclone inlet must be increased if a greater volume of air is to be drawn into the surface cleaning apparatus. This often requires taller cyclone inlets, resulting in a corresponding increase in the height of the cyclone chamber.
  • a surface cleaning apparatus may be provided with multiple airflow passages leading to the cyclone chamber.
  • Each airflow passage may terminate at one or more ports into the cyclone chamber. Therefore, if an airflow passage terminates at a single port in the sidewall of a cyclone chamber, then each airflow passage may provide a separate air inlet to the cyclone chamber.
  • Each cyclone inlet can be a substantially tangential air inlet into the cyclone chamber.
  • a surface cleaning apparatus comprising:
  • a cyclone positioned in the air flow path the cyclone having a cyclone chamber, a cyclone chamber sidewall, a first airflow passage having an inlet end and a downstream outlet end wherein the downstream outlet end comprises a first tangential air inlet, a second airflow passage having an inlet end and a downstream outlet end wherein the downstream outlet end comprises a second tangential air inlet, a cyclone air outlet and a longitudinal cyclone axis about which the air rotates in the cyclone chamber in a direction of rotation of air in the cyclone chamber, wherein the first tangential air inlet has an upstream edge that is upstream from a downstream edge of the first tangential air inlet in the direction of rotation of air in the cyclone chamber and the second tangential air inlet has an upstream edge that is upstream from a downstream edge of the second tangential air inlet in the direction of rotation of air in the cyclone chamber, and wherein the first and second airflow passages are isolated from
  • a portion of each of the first and second airflow passages may extend generally parallel to the cyclone axis and the portions can be adjacent each other.
  • a portion of each of the first and second airflow passages may extend generally parallel to the cyclone axis and the portions may abut each other.
  • the first and second airflow passages may be positioned exterior to the cyclone chamber sidewall.
  • the inlet end of the first airflow passage and the inlet end of the second airflow passage may each be in fluid communication with a single upstream air flow conduit.
  • the surface cleaning apparatus may be a hand vacuum cleaner and each of the first and second airflow passages may extend from the dirty air inlet.
  • the surface cleaning apparatus may be a hand vacuum cleaner and each of the first and second airflow passages may extend from an inlet end of the dirty air inlet.
  • the upstream edge of the second tangential air inlet may be adjacent the downstream edge of the first tangential air inlet.
  • a portion of the cyclone chamber sidewall may be positioned between the upstream edge of the second tangential air inlet and the downstream edge of the first tangential air inlet.
  • a downstream portion of the second airflow passage may be spaced apart from a downstream portion of the first airflow passage.
  • downstream portion of the second airflow passage may be generally linear.
  • a downstream portion of the first airflow passage may be generally linear.
  • a surface cleaning apparatus comprising:
  • a cyclone positioned in the air flow path the cyclone having a cyclone chamber, a cyclone chamber sidewall, a first airflow passage having an inlet end and a downstream outlet end wherein the downstream outlet end comprises a first tangential air inlet, a second airflow passage having an inlet end and a downstream outlet end wherein the downstream outlet end comprises a second tangential air inlet, a cyclone air outlet and a longitudinal cyclone axis about which the air rotates in the cyclone chamber in a direction of rotation of air in the cyclone chamber, wherein the air flow path comprises a common airflow passage upstream of the first and second airflow passages and an axis of the common airflow passage intersects the cyclone chamber, wherein the second tangential air inlet is positioned around a perimeter of the cyclone chamber sidewall downstream from the first tangential air inlet in the direction of rotation of air in the cyclone chamber, and wherein at least a portion of the first tangential
  • the divider may include a convex member that extends towards the downstream end of the common airflow passage.
  • the surface cleaning apparatus may include a convex member that extends towards the downstream end of the common airflow passage.
  • the convex member may have a first portion that comprises a wall at an inlet end to the first airflow passage and a second portion that comprises a wall at an inlet end to the second airflow passage.
  • the divider may have a first portion that comprises a wall at an inlet end to the first airflow passage and a second portion that comprises a wall at an inlet end to the second airflow passage.
  • the second airflow passage may extend generally linearly from the convex member to the second tangential air inlet and at least a portion of the first airflow passage may extend in a counter rotational direction from the convex member to the first tangential air inlet.
  • the second airflow passage may extend generally linearly from the divider to the second tangential air inlet and at least a portion of the first airflow passage may extend in a counter rotational direction from the divider to the first tangential air inlet.
  • At least a portion of the first airflow passage may extend in a counter rotational direction.
  • the common airflow passage may extend downstream from the dirty air inlet.
  • the common airflow passage may extend generally linearly to the first and second airflow passages.
  • a surface cleaning apparatus comprising: (a) an air flow path extending from a dirty air inlet to a clean air outlet with a suction motor positioned in the air flow path; and,
  • a cyclone positioned in the air flow path the cyclone having a cyclone chamber, a cyclone chamber sidewall, a first airflow passage having an inlet end and a downstream outlet end wherein the downstream outlet end comprises a first tangential air inlet, a second airflow passage having an inlet end and a downstream outlet end wherein the downstream outlet end comprises a second tangential air inlet, a cyclone air outlet and a longitudinal cyclone axis about which the air rotates in the cyclone chamber in a direction of rotation of air in the cyclone chamber, wherein the air flow path comprises a common airflow passage upstream of the first and second airflow passage, wherein the second tangential air inlet is positioned around a perimeter of the cyclone chamber sidewall downstream from the first tangential air inlet in the direction of rotation of air in the cyclone chamber, and wherein at least a portion of the first airflow passage extends in a counter rotational direction.
  • Figure 1 is a top front perspective view of a hand vacuum cleaner in accordance with an embodiment
  • Figure 2 is a sectional view of the hand vacuum cleaner of Figure 1 , taken along line 2-2 in Figure 1 with a first example airflow passage;
  • Figure 3 is a sectional view of the hand vacuum cleaner of Figure 1 , taken along line 3-3 in Figure 1 with the first example airflow passage;
  • Figure 4 is a perspective sectional view of the hand vacuum cleaner of Figure 1 , taken along line 3-3 in Figure 1 with the first example airflow passage;
  • Figure 5 is a sectional view of the hand vacuum cleaner of Figure 1 , taken along line 2-2 in Figure 1 with a second example airflow passage;
  • Figure 6 is a perspective sectional view of the hand vacuum cleaner of Figure 1 , taken along line 3-3 in Figure 1 with the second example airflow passage;
  • Figure 7 is a sectional view of the hand vacuum cleaner of Figure 1 , taken along line 2-2 in Figure 1 with the second example airflow passage;
  • Figure 8 is a sectional view of the hand vacuum cleaner of Figure 1 , taken along line 3-3 in Figure 1 with the second example airflow passage;
  • Figure 9A is a top perspective view of an example cyclone and airflow passage for a vacuum cleaner in accordance with an embodiment
  • Figure 9B is a front view of the example cyclone and airflow passage of Figure 9A;
  • Figure 9C is a perspective sectional view of the example cyclone and airflow passage of Figure 9A, taken along line 9-9 in Figure 9B;
  • Figure 9D is a sectional view of the example cyclone and airflow passage of Figure 9A, taken along line 9-9 in Figure 9B;
  • Figure 10A is a top perspective view of an example cyclone and airflow passage for a vacuum cleaner in accordance with an embodiment
  • Figure 10B is a front view of the example cyclone and airflow passage of Figure 10A;
  • Figure 10C is a perspective sectional view of the example cyclone and airflow passage of Figure 10A, taken along line 10-10 in Figure 10B;
  • Figure 10D is a sectional view of the example cyclone and airflow passage of Figure 10A, taken along line 10-10 in Figure 10B;
  • Figure 1 1 A is a top perspective view of an example cyclone and airflow passage for a vacuum cleaner in accordance with an embodiment
  • Figure 1 1 B is a front view of the example cyclone and airflow passage of Figure 1 1A;
  • Figure 1 1 C is a perspective sectional view of the example cyclone and airflow passage of Figure 1 1A, taken along line 1 1 -1 1 in Figure 1 1 B;
  • Figure 1 1 D is a sectional view of the example cyclone and airflow passage of Figure 1 1 A, taken along line 1 1 -1 1 in Figure 1 1 B;
  • Figure 12A is a top perspective view of an example cyclone and airflow passage for a vacuum cleaner in accordance with an embodiment
  • Figure 12B is a front view of the example cyclone and airflow passage of Figure 12A;
  • Figure 12C is a perspective sectional view of the example cyclone and airflow passage of Figure 12A, taken along line 12-12 in Figure 12B;
  • Figure 12D is a sectional view of the example cyclone and airflow passage of Figure 12A, taken along line 12-12 in Figure 12B;
  • Figure 13A is a top perspective view of an example cyclone and airflow passage for a vacuum cleaner in accordance with an embodiment
  • Figure 13B is a front view of the example cyclone and airflow passage of Figure 13A;
  • Figure 13C is a perspective sectional view of the example cyclone and airflow passage of Figure 13A, taken along line 13-13 in Figure 13B;
  • Figure 13D is a sectional view of the example cyclone and airflow passage of Figure 13A, taken along line 13-13 in Figure 13B;
  • Figure 14A is a top perspective view of an example cyclone and airflow passage for a vacuum cleaner in accordance with an embodiment;
  • Figure 14B is a front view of the example cyclone and airflow passage of Figure 14A;
  • Figure 14C is a perspective sectional view of the example cyclone and airflow passage of Figure 14A, taken along line 14-14 in Figure 14B;
  • Figure 14D is a sectional view of the example cyclone and airflow passage of Figure 14A, taken along line 14-14 in Figure 14B; and,
  • Figure 15 is a top section view of another example cyclone and airflow passage for a vacuum cleaner in accordance with an embodiment.
  • two or more parts are said to be “coupled”, “connected”, “attached”, or“fastened” where the parts are joined or operate together either directly or indirectly (i.e., through one or more intermediate parts), so long as a link occurs.
  • two or more parts are said to be“directly coupled”,“directly connected”,“directly attached”, or“directly fastened” where the parts are connected in physical contact with each other. None of the terms “coupled”, “connected”, “attached”, and “fastened” distinguish the manner in which two or more parts are joined together.
  • a hand vacuum cleaner is a vacuum cleaner that can be operated to clean a surface generally one- handedly. That is, the entire weight of the vacuum may be held by the same one hand used to direct a dirty air inlet of the vacuum cleaner with respect to a surface to be cleaned.
  • the handle and a clean air inlet may be rigidly coupled to each other (directly or indirectly) so as to move as one while maintaining a constant orientation relative to each other.
  • surface cleaning apparatus 1000 may alternately be any surface cleaning apparatus, such as an upright surface cleaning apparatus, a stick vac, a canister surface cleaning apparatus, an extractor or the like. It will also be appreciated that the surface cleaning apparatus may use any configuration of the operating components and the airflow paths exemplified herein.
  • surface cleaning apparatus 1000 includes a main body 1010 having a housing 101 1 and a handle 1020, an air treatment member 1 100 connected to the main body 1010, a dirty air inlet 1030, a clean air outlet 1040, and an air flow path extending between the dirty air inlet 1030 and the clean air outlet 1040.
  • Surface cleaning apparatus 1000 has a front end 1002, a rear end 1004, an upper end or top 1006, and a lower end or bottom 1008.
  • dirty air inlet 1030 is at an upper portion of the front end 1002 and clean air outlet 1040 is at rearward portion of the lower end 1008. It will be appreciated that the dirty air inlet 1030 and the clean air outlet 1040 may be provided in different locations.
  • a suction motor 1050 (see e.g. Figure 2) is provided to generate vacuum suction through the air flow path, and is positioned within a motor housing.
  • the suction motor 1050 is positioned downstream from the air treatment member 1 100, although it may be positioned at any location in the surface cleaning apparatus such as upstream of the air treatment member (e.g., a dirty air motor) in alternative embodiments.
  • Air treatment member 1 100 is configured to remove particles of dirt and other debris from the air flow and/or otherwise treat the air flow.
  • air treatment member 1 100 includes a cyclone assembly having a single cyclonic cleaning stage with a single cyclone chamber 1 102 and a dirt collection region 1 122 external to the cyclone chamber.
  • the dirt collection chamber 1 122 is positioned exterior to the cyclone chamber 1 102 and is in communication with the dirt outlet 1 120 to receive dirt and debris dis-entrained from a dirty air flow by the cyclone chamber 1 1 10.
  • the cyclone chamber 1 102 and dirt collection region 1 122 may be of any configuration suitable for separating dirt from an air stream and collecting the separated dirt, respectively.
  • the cyclone assembly may include two or more cyclonic cleaning stages arranged in series with each other.
  • Each cyclonic cleaning stage may include one or more cyclone chambers (arranged in parallel or series with each other) and one or more dirt collection chambers, of any suitable configuration.
  • the dirt collection chamber or chambers may be external to the cyclone chambers, or may be internal the cyclone chamber and configured as a dirt collection area or region within the cyclone chamber.
  • the surface cleaning apparatus may also incorporate additional air treatment members, such as a bag, a porous physical filter media (such as foam or felt), or other air treating means.
  • the surface cleaning apparatus 1000 may include a pre-motor filter housing provided in the air flow path downstream of the air treatment member 1 100 and upstream of the suction motor 1050.
  • the pre-motor filter housing may be of any suitable construction, including any of those exemplified herein.
  • a pre-motor filter 1320 is positioned within the pre-motor filter housing.
  • Pre-motor filter 1320 may be formed from any suitable physical, porous filter media and have any suitable shape, including the examples disclosed herein with respect to a removable pre-motor filter assembly.
  • the pre-motor filter may be one or more of a foam filter, felt filter, HEPA filter, other physical filter media, electrostatic filter, and the like.
  • hand vacuum cleaner 1000 may also include a post-motor filter provided in the air flow path downstream of the suction motor 1050 and upstream of the clean air outlet 1040.
  • Post-motor filter may be formed from any suitable physical, porous filter media and have any suitable shape, including the examples disclosed herein.
  • the post-motor filter may be any suitable type of filter such as one or more of a foam filter, felt filter, HEPA filter, other physical filter media, electrostatic filter, and the like.
  • the dirty air inlet 1030 of the hand vacuum cleaner 1000 is the inlet end 1032 of an inlet conduit 1036.
  • inlet end 1032 of the conduit 1036 can be used as a nozzle to directly clean a surface.
  • the air inlet conduit 1036 is, in this example, a generally linear hollow member that extends along an inlet conduit axis 1035 that is oriented in a longitudinal forward/backward direction and is generally horizontal when hand vacuum cleaner 1000 is oriented with the upper end 1006 above the lower end 1008.
  • inlet conduit 1036 may be connected or directly connected to the downstream end of any suitable accessory tool such as a rigid air flow conduit (e.g., an above floor cleaning wand), a crevice tool, a mini brush, and the like.
  • a rigid air flow conduit e.g., an above floor cleaning wand
  • a crevice tool e.g., a mini brush, and the like.
  • dirty air inlet 1030 is positioned forward of the air treatment member 1 100, although this need not be the case.
  • the dirty air inlet 1030 is positioned so that the inlet conduit axis 1035 intersects the cyclone chamber 1 102.
  • the dirty air inlet 1030 may be provided at an alternate location, such as above the cyclone chamber 1 102.
  • the hand vacuum cleaner also includes a clean air outlet 1040 at the outlet end of the airflow path.
  • the clean air outlet may be located at any position on the surface cleaning apparatus 1000.
  • air may exit the hand vacuum cleaner 1000 via a grill located in a lower portion of the main body 1010 (e.g., via an air outlet provided in the rear end of the main body 1010 or a sidewall adjacent the rear end as shown in FIG. 1 ). Alternately, air may exit through an upper portion of the main body 1010 or the rear end of the main body 1010.
  • An optional accessory power coupler 1061 may be provided, e.g., adjacent to the inlet conduit 1036.
  • Accessory power coupler 1061 includes a set of electrical connectors that can inter-engage with compatible electrical connectors on an accessory tool in order to provide an electrical connection between e.g. a power source of the hand vacuum and a motor or other electrical device of an accessory tool (e.g. a powered brush roller, a light source, and the like).
  • a male connector i.e. projecting outwardly from the main body 1010 of the hand vacuum cleaner 1000
  • it may be a female connector (i.e.
  • the accessory power coupler 1061 may be positioned laterally to one side of the inlet conduit 1036. In other examples, the accessory power coupler 1061 may be located above or below the inlet conduit 1036.
  • power may be supplied to the suction motor 1050 and other electrical components of the hand vacuum cleaner from an onboard energy storage member which may include, for example, one or more batteries or other energy storage device.
  • the hand vacuum cleaner 1000 includes a removable battery pack 1080 provided below the handle 1020.
  • the battery pack 1080 can include one or more energy storage members, such as batteries.
  • a battery pack may not be provided and power may be supplied to the hand vacuum cleaner by an electrical cord connected to the hand vacuum cleaner (not shown) that can be connected to a standard wall electrical outlet.
  • a power switch 1060 may be provided to selectively control the operation of the suction motor (e.g. either on/off or variable power levels or both), for example by establishing a power connection between the batteries and the suction motor.
  • the power switch may be provided in any suitable configuration and location, including a button, rotary switch, sliding switch, trigger-type actuator and the like.
  • power switch 1060 is in the form of a switch located toward the upper portion of the rear end 1004 of the hand vacuum cleaner, above the handle 1020. In this position, a user may be able to access the button 1060 while holding the hand vacuum via the hand grip, e.g. with the thumb of the hand holding the handle, and/or with a digit of their other hand.
  • the power switch 1060 or an alternate controller may also be configured to control other aspects of the hand vacuum (brush motor on/off, etc.).
  • the power switch may be provided on the main body (such as on the motor housing or other suitable location).
  • An optional information display device may be provided to display one or more visual indications to a user.
  • the display device may provide a visual indication of: when suction motor is on; the current power level of the suction motor (if applicable); the current battery charge level (if applicable); an estimated time until the battery charge will be depleted (if applicable), and/or similar information.
  • the display device may include one or more light sources (e.g. light emitting diodes (LEDs)), display screens (e.g. a liquid crystal, an LED screen, an organic light emitting diode (OLED) screen, and the like.
  • the screen, and associated electronics may be used to display status information of one or more electrical components of the hand vacuum cleaner.
  • hand vacuum cleaners 1000 and 1000A may include a single cyclonic cleaning stage with a cyclone chamber 1 102 that has multiple cyclone air inlet passages in fluid communication with (downstream of) the inlet conduit 1036, a cyclone air outlet 1 1 10, and a dirt outlet 1 120 that is in communication with a dirt collection chamber 1 122.
  • the surface cleaning apparatus 1000 (and surface cleaning apparatus 1000A) includes an air flow path extending from the dirty air inlet 1030 to the clean air outlet 1040.
  • the suction motor 1050 and cyclone 1 100 are positioned in the air flow path. Air entering the dirt air inlet 1030 is directed to the cyclone chamber 1 102 via multiple separate airflow passages.
  • the cyclone air inlets of cyclone chamber 1102 are provided by the downstream ends of separate airflow passages that are located downstream of the inlet conduit 1036.
  • hand vacuum cleaners 1000 and 1000A include a first airflow passage 1130 and a second airflow passage 1 140 having an upstream end that is fluidly connected to a downstream end of the inlet conduit 1036 and a downstream end that is fluidly connected to cyclone chamber 1 102.
  • the cyclone 1 100 of the hand vacuum cleaners 1000 and 1000A may optionally be a single cyclonic cleaning stage with bidirectional air flow (i.e. where the cyclone air inlet and cyclone air outlet are at the same end of the cyclone chamber).
  • a‘uniflow’ cyclone chamber i.e. where the cyclone air inlet and cyclone air outlet are at opposite ends of the cyclone chamber
  • the cyclone may be an inverted cyclone.
  • the cyclone chamber 1 102 may be oriented in any direction.
  • a central axis or axis of rotation 1106 of the cyclone chamber 1 102 may be oriented vertically, as exemplified in Figure 2.
  • Air in the cyclone chamber 1 102 rotates around the central axis 1 106 in a defined direction of rotation 1 108, shown as clockwise in the illustrated example.
  • the cyclone chamber may be oriented horizontally, or at any angle between horizontal and vertical.
  • the cyclone air outlet 1 160 is provided in the upper end wall of the cyclone chamber 1 102 and a vertically extending vortex finder conduit 1 1 12 extends from the upper end wall and is aligned with the cyclone air outlet 1 160.
  • a mesh screen 1 1 14 may be positioned over some or all of the inlet apertures of the vortex finder conduit 1 1 12 to help inhibit lint, hair, and other such debris from entering the vortex finder conduit 1 1 12.
  • the cyclone chamber 1 102 includes a cyclone chamber sidewall 1 104 that extends generally parallel to the cyclone axis 1106.
  • the cyclone chamber sidewall 1 104 extends between an upper wall of the cyclone chamber 1 102 (adjacent the cyclone outlet 1 1 10) and the dirt outlet 1 120.
  • the cyclone air inlet passages may terminate at inlet ports formed in the sidewall 1 104.
  • the air flow path includes a common airflow passage 1 150 positioned upstream of the first airflow passage 1 130 and the second airflow passage 1 140. Air entering the dirty air inlet 1030 passes through the common airflow passage 1 150, then separates into the first airflow passage 1 130 and the second airflow passage 1 140 before entering the cyclone chamber 1 102. As shown in the example of FIG. 3, the common air flow passage 1 150 extends from the dirty air inlet 1030 to a divider 1160 separating the first airflow passage 1 130 and the second airflow passage 1 140 and may thus also be considered the inlet passage 1036.
  • a common air flow passage 1 150 may be omitted.
  • separate air flow passages may extend from the dirty air inlet 1030 to the cyclone chamber 1 102. See for example Figures 9A-D.
  • the common air flow passage 1 150 may extend towards the cyclone chamber 1 102. As shown in FIG. 3, the common airflow passage 1 150 may have a central axis 1 151 that intersects the cyclone chamber 1 102. In some examples, the common airflow passage 1 150 may extend generally linearly to the first and second airflow passages, i.e. without any bends or turns in the common airflow passage 1 150. This may reduce backpressure and airflow losses through the common airflow passage.
  • the common air flow passage 1 150 may extend in an alternative direction, where its central axis does not intersect the cyclone chamber.
  • the common air flow passage may extend at an angle to the separate air flow passages leading to the cyclone chamber.
  • the angle between the common airflow passage and the separated airflow passages may be up to 90°.
  • air travelling through the hand vacuum cleaner may travel generally rearwardly along a common airflow passage (i.e. parallel to the conduit axis 1035) and then enter a tangential air inlet which essentially changes the direction of the air to travel generally downwardly through the cyclone air inlet (i.e. generally orthogonal to the cyclone axis).
  • Hand vacuum cleaner 1000 in hand vacuum cleaner 1000, the divider 1 160 is positioned adjacent to the cyclone 1 100 at the downstream end of the common airflow passage 1 150.
  • Hand vacuum cleaner 1000A ( Figure 8) is generally similar to hand vacuum cleaner 1000, except that in hand vacuum cleaner 1000 divider 1 160 is provided by a convex member 1 170 rather than divider member 1 162, which has a generally straight transverse face that faces the inlet passages 1 130 and 1 140. In both examples, divider 1 160 and divider 1 170 divide the air from the common airflow passage 1 150 into the first airflow passage 1130 and second airflow passage 1 140.
  • the divider 1 160 may also define a portion of the cyclone chamber sidewall 1 104. This may reduce the space required for the divider 1 160, by partially integrating it into the cyclone unit 1 100.
  • the divider 1 160 may include separate wall portions for the first airflow passage and the second airflow passage.
  • the divider 1 160 may include a first wall portion 1 172 at the upstream inlet end 1 132 of the first airflow passage 1 130 and a second wall portion 1 174 at the upstream inlet end 1 142 of the second airflow passage 1 140.
  • the first wall portion 1 172 may have a different shape from the second wall portion 1 174.
  • at least a portion of the first airflow passage 1 130 may extend in a counter rotational direction as it extends from the divider 1 160 to the second tangential air inlet 1 134 (see e.g. Figure 3).
  • the divider 1 160 may define a junction at the downstream end of the common airflow passage 1 150.
  • the junction may be a t-shaped junction formed by a divider member 1 162 having a substantially straight upstream wall (see e.g. Figure 6). This may encourage the air to separate between the first air passage 1 130 and second air passage 1 140, optionally evenly, based on the pressure in each airflow passage.
  • the divider 1 160 may be a convex member 1 170 (see e.g. Figure 3). As shown, the convex member 1 170 has an outer surface that extends towards the downstream end of the common airflow passage 1 150. Shaping the divider 1 160 as a convex member 1 170 may help reduce backpressure by redirecting the air flow from the common airflow passage 1 150 gradually and avoiding sharp turns or bends in the air flow pathway, which could cause eddy currents.
  • the divider 1 160 may be any suitable member positioned to separate the airflow from the common airflow passage 1 150 into multiple downstream airflow passages leading into the cyclone chamber 1 102.
  • walls 1 172 and 1174 could meet at an apex point or a generally rounded juncture.
  • the first airflow passage 1 130 extends from an upstream inlet end 1 132, positioned at the downstream end of the common airflow passage 1 150, to a downstream outlet end 1 134.
  • the downstream outlet end 1 134 which may be a port or opening in the sidewall of the cyclone, defines one of the cyclone air inlets and may provide a tangential air inlet.
  • the second airflow passage 1 140 extends from an upstream inlet end 1 142 to a downstream outlet end 1 144, which may be a port or opening in the sidewall of the cyclone, with the downstream outlet end 1 144 defining another cyclone air inlet, which may also be a tangential air inlet.
  • the second airflow passage 1 140 may extend more linearly from the divider 1 160 to the second tangential air inlet 1 144 than the first airflow passage. Using a more linear path for the second airflow passage may reduce the backpressure on the air in the second airflow passage 1 140 by reducing the number of bends in the airflow path. As shown in Figure 3, the second airflow passage curves slightly in the direction or rotation of air in the cyclone as opposed to a more linear path as exemplified in Figure 8. It will be appreciated that the first and second airflow paths may have different amounts of curvature.
  • the first airflow passage 1 130 may extend in a counter rotational direction. That is, the first airflow passage 1 130 may include a portion that extends in a direction opposite to the direction of rotation 1 108 of air in the cyclone 1 100. As shown, air in the cyclone 1 100 rotates in a clockwise direction 1 108. Accordingly, the first airflow passage 1 130 includes a portion 1 178 that extends in a counterclockwise direction.
  • the volume of air drawn into the cyclone chamber 1 102 is limited by the size of the cyclone inlets.
  • the height of each inlet may be reduced by half as compared to a single inlet cyclone (having the same width as each of the inlets 1 134 and 1 144), while permitting the same volume of air to be drawn through (i.e. without reducing the total cross-sectional area of the cyclone inlets).
  • each of the cyclone air inlets provided by the first and second airflow passages have the same inlet height, indicated as hi.
  • the height of the cyclone inlets may be different, which may encourage more air to flow towards the taller inlet (assuming the inlets have the same width).
  • the height h c of the cyclone chamber 1 102 may be defined as a multiple of the height hi of each inlet.
  • the height of the cyclone chamber 1 102 may be selected based on the number of revolutions through the cyclone chamber 1 102 that are desired for sufficient separation of dirt and debris.
  • Height h c may be about 2 - 6, 3-5, or 3-4 times the height hi.
  • the height h c may be about 3.5-4.5 times the height hi to allow for 3-4 revolutions as a band of air swirls through the cyclone chamber 1 102.
  • each tangential cyclone inlet 1 134 and 1 144 also limits the volume of air drawn into the cyclone chamber 1 102.
  • One or both of the widths W1134 and wi 4 may be defined to be less than the radial width w r of the cyclone chamber 1 102.
  • the radial width w r defines the maximum width available for a band of air to circulate within the cyclone chamber 1 102.
  • each of the cyclone inlets 1 134 and 1 144 are less than, or equal to, the radial width w r backpressure caused by bands of air squeezing into the cyclone chamber 1 102 may be prevented.
  • Each of the cyclone inlets provided by downstream outlet end 1 134 and downstream outlet end 1 134 may be positioned as discrete inlets around the perimeter of the cyclone chamber sidewall 1 104.
  • the cyclone inlets may be formed as slots or ports in the sidewall 1 104.
  • the upstream outlet end 1 144 of the second air flow passage 1 140 is positioned downstream from the downstream outlet end 1 134 of the first air flow passage 1 130, in direction of rotation 1 108 of the cyclone chamber 1 108, i.e., and are separated from each other by a portion of the sidewall 1 104 of the cyclone.
  • the cyclone air inlets are vertically aligned along the sidewall 1 104 of the cyclone chamber 1 102. That is, each cyclone air inlet may be located at about the same vertical location in the cyclone chamber 1 102. This may ensure that more of the volume of the cyclone chamber 1 102 is used, as the bands of air from each cyclone inlet can enter at, or near, the first end of the cyclone chamber 1 102. It will be appreciated that the inlets may alternately be vertically staggered.
  • the tangential air inlet defined by the first airflow passage 1 130 may be positioned upstream from the location at which the common airflow passage axis 1 151 intersects the cyclone chamber 1 102. Shifting the tangential air inlet defined by the first airflow passage 1 130 to be upstream of the axis 1 151 of the common airflow passage 1 150 may further separate the tangential air inlets without requiring sharp turns or bends in the air flow path.
  • the band of air entering the cyclone 1 100 from the second airflow passage 1 140 may encounter backpressure from the band of air that entered the cyclone chamber 1 102 from the first airflow passage 1 130.
  • air entering the cyclone chamber will commence to rotate in the rotational direction and will commence to spiral downwardly towards the opposed axial end of the cyclone.
  • the air entering the cyclone may tend to be compressed radially inwardly as it rotates in the cyclone chamber 1 102. Therefore, air entering the cyclone chamber 1 102 from the second cyclone inlet 1 144 may squeeze or compress the band of air from the first airflow passage 1 130 that has already entered the cyclone chamber 1 102 if the inlets 1 134 and 1 144 are positioned close together.
  • a counter-rotational portion 1 178 can separate the cyclone inlets provided by the downstream outlet end 1134 from the downstream outlet end 1 144 of the second airflow passage 1 140, without the need for an extended conduit around the cyclone 1 100.
  • the downstream outlet end 1 134 of the first airflow passage 1 130 defines a substantially tangential air inlet to the cyclone chamber 1102.
  • the downstream outlet end 1 144 of the second airflow passage 1 140 defines a tangential air inlet to the cyclone chamber 1 102. Tangential air inlets may reduce air flow losses within the air flow path.
  • the surface cleaning apparatus 1000/1000A may omit divider 1060. That is, the surface cleaning apparatus 1000 may not include a divider member that defines a junction at the downstream end of a common airflow passage.
  • the common airflow passage may terminate with the first and second airflow passage may extending from the outlet end of the common airflow passage. In such a case, the upstream end of the first and second airflow paths may extend in parallel with a wall separating them.
  • the common airflow passage may even be omitted, and the separate airflow passages may extend from the dirty air inlet 1030 to the cyclone chamber 1 102.
  • Figures 9-15 exemplifies various examples of cyclone units with multiple cyclone inlets.
  • the cyclone units shown in Figures 9-15 may be used with surface cleaning apparatuses, such as the hand vacuum cleaners 1000 and 1000A described herein above. Alternately, the cyclone units shown in Figures 9-15 may be used with any surface cleaning apparatus, such as an upright surface cleaning apparatus, a stick vac, a canister surface cleaning apparatus, an extractor or the like.
  • a dividing member need not be used to provide a junction separating the airflow passages.
  • Figures 9A-9D illustrate an example configuration of a cyclone unit 1200 having a pair of cyclone inlets 1234 and 1244.
  • the cyclone unit 1200 includes a cyclone chamber 1202 and a dirt collection region 1222.
  • the cyclone chamber 1202 and dirt collection region 1222 are in a side-by- side configuration, with the dirt collection region partially surrounding the cyclone chamber 1202.
  • the cyclone unit 1200 may be positioned in the airflow path of a surface cleaning apparatus such as surface cleaning apparatuses 1000 and 1000A. Air from a dirty air inlet can be drawn through the cyclone unit 1200 using a suction motor positioned in the air flow path, and the treated air can subsequently be exhausted out a clean air outlet.
  • a surface cleaning apparatus such as surface cleaning apparatuses 1000 and 1000A. Air from a dirty air inlet can be drawn through the cyclone unit 1200 using a suction motor positioned in the air flow path, and the treated air can subsequently be exhausted out a clean air outlet.
  • the cyclone chamber 1202 includes a cyclone chamber sidewall 1204 that extends generally parallel to the cyclone axis (not shown, but extending into and out of the page in Figure 9D).
  • the air inlets to the cyclone chamber 1202 may include inlet ports formed in the sidewall 1204.
  • the cyclone unit 1200 includes a vertically extending vortex finder conduit 1212, which may be provided with a screen or mesh material at the inlet to the vortex finder.
  • the vortex finder conduit 1212 extends in a direction generally parallel to the cyclone axis. In some cases, as in Figure 9, the cyclone axis may be located at the center of the vortex finder conduit 1212.
  • a plurality of airflow passages are connected to the cyclone chamber 1202. Each of the airflow passages may be fluidly isolated from one another.
  • a first airflow passage 1230 and a second airflow passage 1240 are connected to the cyclone chamber 1202.
  • the first airflow passage 1230 is isolated from the second airflow passage 1240 by a common wall 1250.
  • the first airflow passage 1230 extends from an upstream inlet (not shown) to a downstream outlet 1234 that defines a cyclone air inlet.
  • the second airflow passage 1240 extends from an upstream inlet (not shown) to a downstream outlet 1244 that defines a second cyclone air inlet.
  • Each of the first cyclone air inlet 1234 and the second cyclone air inlet 1244 may be tangential air inlets that direct air into the cyclone chamber 1202 in the direction of rotation 1208 of the cyclone chamber 1202.
  • the first tangential air inlet 1234 has an upstream edge 1238 and a downstream edge 1239.
  • the upstream edge 1238 is upstream from the downstream edge 1239 in the direction of rotation 1208 of the cyclone chamber 1202. This allows the air from the first air flow passage 1230 to enter the cyclone chamber 1202 as a band that is aligned with the direction of rotation 1208 of air within the cyclone.
  • the second tangential air inlet 1244 also has an upstream edge 1248 and a downstream edge 1249.
  • the upstream edge 1248 is upstream from the downstream edge 1249 in the direction of rotation 1208 of the cyclone chamber 1202. This allows the air from the second air flow passage 1240 to enter the cyclone chamber 1202 as a band that is aligned with the direction of rotation 1208 of air within the cyclone.
  • Each of the tangential air inlets may be positioned at the same height within the cyclone chamber, as shown.
  • the width W1234 of the first tangential air inlet 1234 is defined by the distance between the upstream edge 1238 and the downstream 1239, and here corresponds to the width W1230 of the first air flow passage 1230.
  • the width W1244 of the second tangential air inlet 1244 is defined by the distance between the upstream edge 1248 and the downstream 1249, and here corresponds to the width W1240 of the second air flow passage 1240.
  • the width W1234 can be equal to, or less than, a radial width W1202 of the cyclone chamber 1202.
  • the width W1244 of the second tangential air inlet 1240 may be less than, or equal to, the radial width W1202.
  • the widths W1234 and W1244 are each substantially equal to the radial width W1202 of the cyclone chamber 1202.
  • the first airflow passage 1230 and the second airflow passage 1240 may terminate on the exterior of the cyclone chamber sidewall 1204. As shown, both airflow passages terminate with a cyclone air inlet at the location of the cyclone chamber sidewall 1204.
  • the first tangential air inlet 1244 and the second tangential air inlet 1244 are provided as slots or ports in the sidewall 1204 of the cyclone chamber.
  • the second tangential air inlet 1244 is positioned around the perimeter of the cyclone chamber sidewall 1204 downstream from the first tangential air inlet 1244 in the direction of rotation 1208.
  • Each of the first tangential air inlet 1234 and the second tangential air inlet 1244 direct air into the cyclone chamber 1204 in a direction perpendicular to the axis of the cyclone unit 1202. In other words, a plane transverse to the cyclone axis extends through the first and second tangential air inlets 1234/1244.
  • the upstream edge 1248 of the second tangential air inlet 1244 may be positioned adjacent to the downstream edge 1239 of the first tangential air inlet 1234. This may reduce the length of the second airflow passage 1234. This may also allow additional cyclone air inlets to be spaced around the cyclone chamber 1202.
  • the upstream edge 1248 of the second tangential air inlet 1244 may be spaced apart from the downstream edge 1239 of the first tangential air inlet 1234 as shown in Figure 9.
  • a portion of the sidewall 1204 may be positioned between the upstream edge 1248 and the downstream edge 1239. This may provide separation between the bands of air entering the cyclone chamber 1202 from the first airflow passage 1230 and the second airflow passage 1240, which may allow the air bands to diverge vertically.
  • the downstream portion of one or more of the airflow passages may be generally linear approaching the cyclone chamber 1202. As shown in the example of Figure 9, the downstream portion of the first airflow passage 1240 extends in a generally linear direction towards the cyclone chamber 1202. In some embodiments (such as Figure 10 below), the downstream portion of the second airflow passage 1240 may also be generally linear.
  • a portion of one or both of the airflow passages may extend in a direction generally parallel to the cyclone axis.
  • a hand vacuum cleaner in which the cyclone is horizontally oriented may include a portion of both of the airflow passages that also extend horizontally as dirty air travels from a dirty air inlet positioned like that shown in surface cleaning apparatus 1000.
  • the air flow passages may always extend perpendicular to, or at an angle to, the cyclone axis (e.g. as with surface cleaning apparatus 1000).
  • the portions of the airflow passages extending parallel to the cyclone axis may be adjacent one another. These airflow passages may abut one another, e.g. on opposite sides of a common separating wall, such as wall 1250.
  • the first airflow passage 1230 and the second airflow passage 1240 may extend upstream to a dirty air inlet of the surface cleaning apparatus, such as dirty air inlet 1030 described herein above. This would provide separate dirty air inlets (e.g., the upstream ends shown in Figure 9A may be the dirty air inlets to the surface cleaning apparatus).
  • An advantage of this design is that larger dirt that cannot pass through one of airflow paths 1230, 1240 cannot enter the surface cleaning apparatus and produce a clog.
  • both the first airflow passage 1230 and the second airflow passage 1240 may have an inlet end that is in fluid communication with a downstream end of a single upstream airflow conduit (not shown). This upstream airflow conduit may in turn fluidly communication with the dirty air inlet 1030.
  • FIGS 10A-10D illustrate another example configuration of a cyclone unit 1300 that may be used with a surface cleaning apparatus, such as surface cleaning apparatuses 1000 and 1000A.
  • the cyclone unit 1300 includes a cyclone chamber 1302 and a dirt collection region 1322.
  • cyclone unit 1300 has a pair of cyclone inlets 1334 and 1344.
  • the first airflow passage 1330 is spaced apart from the second airflow passage 1340 by one or more spacers 1351.
  • a spacer may be omitted when the airflow passages are spaced apart.
  • the cyclone chamber 1302 includes a cyclone chamber sidewall 1304 that extends generally parallel to the cyclone axis 1306.
  • the air inlets to the cyclone chamber 1302 may include inlet ports formed in the sidewall 1304.
  • the cyclone chamber 1300 also includes a vertically extending vortex finder conduit 1312.
  • a first airflow passage 1330 and a second airflow passage 1340 are connected to the cyclone chamber 1302.
  • the first airflow passage 1330 extends, e.g., from a downstream end of a common inlet passage (not shown) to a downstream outlet 1334 that defines a first tangential cyclone air inlet.
  • the second airflow passage 1340 extends, e.g., from a downstream end of a common inlet passage (not shown) to a downstream outlet 1344 that defines a second tangential cyclone air inlet.
  • the first tangential air inlet 1334 extends between an upstream edge 1338 and a downstream edge 1339 that is downstream from the upstream edge 1338 in the direction of rotation 1308 of the cyclone chamber 1302.
  • the second tangential air inlet 1344 also extends between an upstream edge 1348 and a downstream edge 1349 that is downstream from the upstream edge 1348 in the direction of rotation 1308.
  • Each of the tangential air inlets may be positioned at the same height within the cyclone chamber 1302, as shown.
  • Figures 1 1A-1 1 D illustrate another example configuration of a cyclone unit 1400 that may be used with a surface cleaning apparatus, such as surface cleaning apparatuses 1000 and 1000A.
  • the cyclone unit 1400 includes a cyclone chamber 1402 and a dirt collection region 1422.
  • cyclone unit 1400 has a pair of cyclone inlets 1434 and 1444. However, in cyclone unit 1400 the second tangential air inlet 1444 is spaced about half way around the perimeter of the cyclone chamber sidewall 1404 from the first tangential air inlet 1434.
  • the cyclone chamber 1402 includes a cyclone chamber sidewall 1404 that extends generally parallel to the cyclone axis 1406.
  • the air inlets to the cyclone chamber 1402 may include inlet ports formed in the sidewall 1404.
  • the cyclone chamber 1400 also includes a vertically extending vortex finder conduit 1412.
  • a first airflow passage 1430 and a second airflow passage 1440 are connected to the cyclone chamber 1402.
  • the first airflow passage 1430 extends, e.g., from a downstream end of a common inlet passage (not shown) to a downstream outlet 1434 that defines a first tangential cyclone air inlet.
  • the second airflow passage 1440 extends, e.g., from a downstream end of a common inlet passage (not shown) to a downstream outlet 1444 that defines a second tangential cyclone air inlet.
  • the first tangential air inlet 1434 extends between an upstream edge 1438 and a downstream edge 1439 that is downstream from the upstream edge 1438 in the direction of rotation 1408 of the cyclone chamber 1402.
  • the second tangential air inlet 1444 also extends between an upstream edge 1448 and a downstream edge 1449 that is downstream from the upstream edge 1448 in the direction of rotation 1408.
  • Each of the tangential air inlets may be positioned at the same height within the cyclone chamber, as shown.
  • the second tangential air inlet 1444 is positioned approximately opposite the first tangential air inlet 1444. This may allow the air band that enters from the first tangential air inlet 1444 to be displaced within the cyclone chamber by a greater extent before it reaches the location of the second tangential air inlet 1434 around the perimeter of the sidewall 1404. For this reason, the height of the cyclone chamber may be approximately half hi compared to a cyclone having a single air inlet.
  • FIGS 12A-12D illustrate another example configuration of a cyclone unit 1500 that may be used with a surface cleaning apparatus, such as surface cleaning apparatuses 1000 and 1000A.
  • the cyclone unit 1500 includes a cyclone chamber 1502 and a dirt collection region 1522.
  • cyclone unit 1500 has a pair of cyclone inlets 1534 and 1544 provided at the downstream end of spaced apart air passages 1530 and 1540.
  • the width of each airflow passage 1530 and 1540 (indicated as W1530 and W1540 respectively), as well as each cyclone inlet 1534 and 1544 is less than the radial width W1502 of the cyclone chamber 1502.
  • the width of each cyclone inlet is about half the radial width W1502 of the cyclone chamber 1502.
  • Reducing the width of the cyclone inlets to less than the radial width of the cyclone chamber 1502 may allow the inlets to be positioned more closely together without their air bands interfering with one another. This, in turn, may allow additional cyclone inlets to be positioned around the cyclone chamber 1502 to increase the volume of air that can be drawn into the cyclone chamber 1502.
  • the cyclone chamber 1502 includes a cyclone chamber sidewall 1504 that extends generally parallel to the cyclone axis 1506.
  • the air inlets to the cyclone chamber 1502 may include inlet ports formed in the sidewall 1504.
  • the cyclone chamber 1500 also includes a vertically extending vortex finder conduit 1512.
  • a first airflow passage 1530 and a second airflow passage 1540 are connected to the cyclone chamber 1502.
  • the first airflow passage 1530 extends, e.g., from a downstream end of a common inlet passage (not shown) to a downstream outlet 1534 that defines a first tangential cyclone air inlet.
  • the second airflow passage 1540 extends, e.g., from a downstream end of a common inlet passage (not shown) to a downstream outlet 1544 that defines a second tangential cyclone air inlet.
  • the first tangential air inlet 1534 extends between an upstream edge 1538 and a downstream edge 1539 that is downstream from the upstream edge 1538 in the direction of rotation 1508 of the cyclone chamber 1502.
  • the second tangential air inlet 1544 also extends between an upstream edge 1548 and a downstream edge 1549 that is downstream from the upstream edge 1548 in the direction of rotation 1508.
  • Each of the tangential air inlets may be positioned at the same height within the cyclone chamber, as shown.
  • FIGS 13A-13D illustrate another example configuration of a cyclone unit 1600 that may be used with a surface cleaning apparatus, such as surface cleaning apparatuses 1000 and 1000A.
  • the cyclone unit 1600 includes a cyclone chamber 1602 and a dirt collection region 1622.
  • cyclone unit 1600 has a pair of cyclone inlets 1634 and 1644 provided at the downstream end of spaced apart air passages 1630 and 1640.
  • the width of the first airflow passage 1630 (indicated as wi63o) is different from the width of the second airflow passage 1640 (indicated as wi64o).
  • the width of the first airflow passage 1630 and cyclone inlet 1634 is less than the radial width w o2 of the cyclone chamber 1602.
  • the width of the first cyclone inlet 1634 is about half the radial width w o2 of the cyclone chamber 1602.
  • the width of the second airflow passage 1640 and second cyclone inlet 1644 is about the same as the radial width wmo2 of the cyclone chamber 1602. This may allow a greater volume of air to enter via the second cyclone inlet 1644 with less backpressure from the band of air that entered the cyclone chamber 1602 via the first cyclone inlet 1634.
  • the cyclone chamber 1602 includes a cyclone chamber sidewall 1604 that extends generally parallel to the cyclone axis 1606.
  • the air inlets to the cyclone chamber 1602 may include inlet ports formed in the sidewall 1604.
  • the cyclone chamber 1600 also includes a vertically extending vortex finder conduit 1612.
  • a first airflow passage 1630 and a second airflow passage 1640 are connected to the cyclone chamber 1602.
  • the first airflow passage 1630 extends, e.g., from a downstream end of a common inlet passage (not shown) to a downstream outlet 1634 that defines a first tangential cyclone air inlet.
  • the second airflow passage 1640 extends, e.g., from a downstream end of a common inlet passage (not shown) to a downstream outlet 1644 that defines a second tangential cyclone air inlet.
  • the first tangential air inlet 1634 extends between an upstream edge 1638 and a downstream edge 1639 that is downstream from the upstream edge 1638 in the direction of rotation 1608 of the cyclone chamber 1602.
  • the second tangential air inlet 1644 also extends between an upstream edge 1648 and a downstream edge 1649 that is downstream from the upstream edge 1648 in the direction of rotation 1608.
  • Each of the tangential air inlets may be positioned at the same height within the cyclone chamber, as shown.
  • Figures 14A-14D illustrate another example configuration of a cyclone unit 1700 that may be used with a surface cleaning apparatus, such as surface cleaning apparatuses 1000 and 1000A.
  • the cyclone unit 1700 includes a cyclone chamber 1702 and a dirt collection region 1722.
  • the cyclone unit 1700 includes three cyclone inlets 1734, 1744 and 1774 positioned at the downstream end of first, second and third separate airflow passages 1730, 1740, and 1770 respectively.
  • the first airflow passage 1730 is spaced apart from the second airflow passage 1740. This may facilitate providing a linear downstream portion in the second airflow passage 1740.
  • the second airflow passage 1740 and third airflow passage 1770 are adjacent one another, but separated by a dividing wall.
  • each airflow passage 1730, 1740, and 1770 is less than the radial width of the cyclone chamber 1702. This may facilitate air bands entering from additional outlets positioned substantially aligned around the perimeter of the cyclone chamber sidewall 1704.
  • the cyclone chamber 1702 includes a cyclone chamber sidewall 1704 that extends generally parallel to the cyclone axis.
  • the air inlets to the cyclone chamber 1702 may include inlet ports formed in the sidewall 1704.
  • the cyclone chamber 1700 also includes a vertically extending vortex finder conduit 1712.
  • a first airflow passage 1730, a second airflow passage 1740, and a third airflow passage 1770 are connected to the cyclone chamber 1702.
  • the first airflow passage 1730 extends, e.g., from a downstream end of a common inlet passage (not shown) to a downstream outlet 1734 that defines a first tangential cyclone air inlet.
  • the second airflow passage 1740 extends, e.g., from a downstream end of a common inlet passage (not shown) to a downstream outlet 1744 that defines a second tangential cyclone air inlet.
  • the third airflow passage 1770 also extends, e.g., from a downstream end of a common inlet passage (not shown) to a downstream outlet 1774 that defines a third tangential cyclone air inlet.
  • the first tangential air inlet 1734 extends between an upstream edge 1738 and a downstream edge 1739 that is downstream from the upstream edge 1738 in the direction of rotation 1708 of the cyclone chamber 1702.
  • the second tangential air inlet 1744 also extends between an upstream edge 1748 and a downstream edge 1749 that is downstream from the upstream edge 1748 in the direction of rotation 1708.
  • the third tangential air inlet 1774 also extends between an upstream edge 1778 and a downstream edge 1779 that is downstream from the upstream edge 1778 in the direction of rotation 1708.
  • Each of the tangential air inlets may be positioned at the same height within the cyclone chamber (i.e. substantially aligned along the longitudinal extent of the cyclone chamber).
  • Figure 15 illustrates an example configuration of a cyclone unit 1800 that may be used with a surface cleaning apparatus, such as surface cleaning apparatuses 1000 and 1000A.
  • the cyclone unit 1800 includes three cyclone inlets 1834, 1844 and 1874 positioned at the downstream end of first, second and third separate airflow passages 1830, 1840, and 1870 respectively.
  • the first airflow passage 1830 is adjacent to the second airflow passage 1840, and the second airflow passage 1840 and third airflow passage 1870 are adjacent one another.
  • each airflow passage 1830, 1840, and 1870 is about the same as, or slightly less than the radial width of the cyclone chamber 1802. This may allow a greater volume of air to enter the cyclone chamber 1802 with a reduce height for each inlet.
  • the cyclone chamber 1802 includes a cyclone chamber sidewall 1804 that extends generally parallel to the cyclone axis.
  • the air inlets to the cyclone chamber 1802 may include inlet ports formed in the sidewall 1804.
  • the cyclone chamber 1800 also includes a vertically extending vortex finder conduit 1812.
  • a first airflow passage 1830, a second airflow passage 1840, and a third airflow passage 1870 are connected to the cyclone chamber 1802.
  • the first airflow passage 1830 extends, e.g., from a downstream end of a common inlet passage (not shown) to a downstream outlet 1834 that defines a first tangential cyclone air inlet.
  • the second airflow passage 1840 extends, e.g., from a downstream end of a common inlet passage (not shown) to a downstream outlet 1844 that defines a second tangential cyclone air inlet.
  • the third airflow passage 1870 also extends, e.g., from a downstream end of a common inlet passage (not shown) to a downstream outlet 1874 that defines a third tangential cyclone air inlet.
  • the first tangential air inlet 1834 extends between an upstream edge 1838 and a downstream edge 1839 that is downstream from the upstream edge 1838 in the direction of rotation 1808 of the cyclone chamber 1802.
  • the second tangential air inlet 1844 also extends between an upstream edge 1848 and a downstream edge 1849 that is downstream from the upstream edge 1848 in the direction of rotation 1808.
  • the third tangential air inlet 1874 also extends between an upstream edge 1878 and a downstream edge 1879 that is downstream from the upstream edge 1878 in the direction of rotation 1808.
  • Each of the tangential air inlets may be positioned at the same height within the cyclone chamber, as shown.
  • the wording “and/or” is intended to represent an inclusive - or. That is,“X and/or Y” is intended to mean X or Y or both, for example. As a further example,“X, Y, and/or Z” is intended to mean X or Y or Z or any combination thereof.
  • a surface cleaning apparatus comprising:
  • a cyclone positioned in the air flow path the cyclone having a cyclone chamber, a cyclone chamber sidewall, a first airflow passage having an inlet end and a downstream outlet end wherein the downstream outlet end comprises a first tangential air inlet, a second airflow passage having an inlet end and a downstream outlet end wherein the downstream outlet end comprises a second tangential air inlet, a cyclone air outlet and a longitudinal cyclone axis about which the air rotates in the cyclone chamber in a direction of rotation of air in the cyclone chamber, wherein the first tangential air inlet has an upstream edge that is upstream from a downstream edge of the first tangential air inlet in the direction of rotation of air in the cyclone chamber and the second tangential air inlet has an upstream edge that is upstream from a downstream edge of the second tangential air inlet in the direction of rotation of air in the cyclone chamber, and wherein the first and second airflow passages are isolated from

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Abstract

L'invention concerne un appareil de nettoyage de surface qui présente un premier trajet d'écoulement d'air s'étendant d'une entrée d'air sale à une sortie d'air propre avec un moteur d'aspiration et un cyclone positionnés dans le premier trajet d'écoulement d'air. Le cyclone présente une chambre de cyclone, un premier passage d'écoulement d'air et un second passage d'écoulement d'air. Le premier passage d'écoulement d'air définit une première entrée d'air tangentielle à la chambre de cyclone et le second passage d'écoulement d'air définit une seconde entrée d'air tangentielle à la chambre de cyclone. Le trajet d'écoulement d'air comprend un passage d'écoulement d'air commun en amont des premier et second passages d'écoulement d'air et un axe du passage d'écoulement d'air commun coupe la chambre de cyclone. Au moins une partie de la première entrée d'air tangentielle est positionnée en amont d'un emplacement au niveau duquel l'axe de passage d'écoulement d'air commun coupe la chambre de cyclone.
PCT/CA2019/050984 2018-07-19 2019-07-17 Appareil de nettoyage de surface WO2020014782A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US16/039,962 2018-07-19
US16/039,875 US10791896B2 (en) 2018-07-19 2018-07-19 Surface cleaning apparatus
US16/039,875 2018-07-19
US16/039,962 US10806317B2 (en) 2018-07-19 2018-07-19 Surface cleaning apparatus

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WO2020014782A1 true WO2020014782A1 (fr) 2020-01-23

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Citations (9)

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Publication number Priority date Publication date Assignee Title
WO1998035603A1 (fr) * 1997-02-13 1998-08-20 Aktiebolaget Electrolux (Publ) Dispositif destine a un aspirateur a separateur cyclone
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