EP0357189A2 - Vorrichtung zum Abscheiden von Stoff aus einem Luftstrom im Staubsauger - Google Patents

Vorrichtung zum Abscheiden von Stoff aus einem Luftstrom im Staubsauger Download PDF

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Publication number
EP0357189A2
EP0357189A2 EP89306732A EP89306732A EP0357189A2 EP 0357189 A2 EP0357189 A2 EP 0357189A2 EP 89306732 A EP89306732 A EP 89306732A EP 89306732 A EP89306732 A EP 89306732A EP 0357189 A2 EP0357189 A2 EP 0357189A2
Authority
EP
European Patent Office
Prior art keywords
air
shelf
inlet chute
flow
entry
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Withdrawn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
EP89306732A
Other languages
English (en)
French (fr)
Other versions
EP0357189A3 (de
Inventor
Charles A. Reed
Richard B. Kosten
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.)
Black and Decker Inc
Original Assignee
Black and Decker 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
Application filed by Black and Decker Inc filed Critical Black and Decker Inc
Publication of EP0357189A2 publication Critical patent/EP0357189A2/de
Publication of EP0357189A3 publication Critical patent/EP0357189A3/de
Withdrawn legal-status Critical Current

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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
    • A47L7/00—Suction cleaners adapted for additional purposes; Tables with suction openings for cleaning purposes; Containers for cleaning articles by suction; Suction cleaners adapted to cleaning of brushes; Suction cleaners adapted to taking-up liquids
    • A47L7/0004—Suction cleaners adapted to take up liquids, e.g. wet or dry vacuum cleaners
    • A47L7/0019—Details of the casing
    • 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
    • A47L7/00—Suction cleaners adapted for additional purposes; Tables with suction openings for cleaning purposes; Containers for cleaning articles by suction; Suction cleaners adapted to cleaning of brushes; Suction cleaners adapted to taking-up liquids
    • A47L7/0004—Suction cleaners adapted to take up liquids, e.g. wet or dry vacuum cleaners
    • A47L7/0042—Gaskets; Sealing means

Definitions

  • This invention relates to an apparatus for separating material from a flow of air in a vacuum cleaner.
  • Vacuum cleaners have found wide application in cleaning up hard surfaces and fabric-covered surfaces.
  • Hard surfaces such as, for example, wooden and tile-covered floors, are usually cleaned by a vacuum cleaner employing pure suction.
  • Fabric-­covered surfaces such as, for example, carpets and car seats, sometimes require the agitation provided by a brush to enhance the cleaning effect of suction.
  • Vacuum cleaners for picking up dry materials fall roughly into two categories, namely, clean-motor and dirty-motor types.
  • a filter is placed between an air intake and a fan motor. This ensures that the motor is protected from contamination by the soil being removed from the surface.
  • the filter is placed downstream of the fan motor.
  • the present invention is indifferent to whether the vacuum cleaner providing the environment for the invention is a clean-motor or a dirty-motor type. However, special precautions must be made to prevent moisture entering the motor and wiring of a dirty-­ motor type vacuum cleaner used to pick up both soil and moisture. For concreteness of description, the following disclosure is discussed in the environment of a clean-motor vacuum cleaner.
  • a fabric can be cleaned by applying a liquid, which may include a cleaning solution therein, to a surface of the fabric.
  • a liquid which may include a cleaning solution therein
  • the presence of liquid droplets entrained in a stream of air complicates the problem of retaining the soil while discharging the air. That is, it is desirable to isolate the filter from the liquid droplets in order to maintain filtering effectiveness, facilitate disposal of liquid and dirt, and to ensure that liquid is kept separate from the electrical and mechanical components of the remainder of the vacuum cleaner, and especially the fan motor.
  • U.S. Patent No. 3,267,511 discloses a vacuum mopping device for a vacuum cleaner. Air is drawn upward from a surface to be cleaned by a reduced pressure. The air, with its entrained moisture is turned into a downward path toward a bottom wherein the liquid is retained. The air turns upward again to depart through a baffle.
  • U.S. Patent No. 4,542,557 discloses a wet-dry vacuum cleaner with a water deflector especially adapted for use in a hand-held vacuum cleaner.
  • the '557 patent describes a device in which airflow through an entry chute is diverted at an angle to prevent entrained liquid droplets from passing directly to the filter.
  • both of the referenced patents have ignored the effect of air flow between the air inlet and the outlet.
  • devices described in both of these patents permit swirling flow of air between their inlets and their outlets.
  • Such swirling flow of air permits liquid droplets to remain entrained in the swirling flow to impact on the filter, thus degrading its filtering effectiveness.
  • the filter may become saturated and permit the liquid to pass through to the fan and fan motor.
  • apparatus for separating material from a flow of air in a vacuum cleaner including an inlet chute for admitting any combination of air, soil and liquid therein, comprising: a separator having an end wall, characterized in that said end wall is disposed substantially at right-angles to an axis of said inlet chute, whereby, in use, said combination impacts said end wall substantially at right-angles thereto for forcing said material to precipitate from said combination.
  • the substantially right-angle impact of the air upon the end wall tends to force liquid droplets to contact the wall, and thus to be taken out of the air flow.
  • optional turbulence-generating fences on the face of the end wall induce turbulence within the air flow as it attempts to flow in a span-wise direction along the face of the end wall. This further tends to induce liquid droplets to contact surfaces upon which they can collect.
  • apparatus for separating material from an air flow in a vacuum cleaner comprising: an inlet chute for permitting entry of said air flow into said vacuum cleaner, a separator, deflecting means on the separator facing an exit of said entry chute for deflecting the air flow, an air opening disposed above said deflecting means, an entry shelf overlying an end of said inlet chute for inhibiting direct flow of said air flow from said inlet chute to said air opening; and the entry shelf extending a substantial distance outward from the air opening; whereby swirling air flow in the vacuum cleaner tends to contact the entry shelf before entering the air opening.
  • a dust bowl for a vacuum cleaner comprising: a housing enclosing the dust bowl, an inlet chute in the housing, the inlet chute being adapted for admitting an air flow into the housing, a separator in the housing, an air opening in the separator, the separator including means for deflecting a flow of air from the inlet chute; and at least one baffle rib extending inward from the housing for disturbing a swirling flow of air therein.
  • FIG. 1 there is shown, generally at 10, a dust bowl according to the prior art. It will be understood that dust bowl 10 is adapted for installation on a vacuum cleaner power unit (not shown) which develops a partial vacuum, thereby to draw air and entrained soil and moisture thereto.
  • a housing 12 includes an anterior end 14 adapted, in known fashion, for attachment to the vacuum cleaner power unit.
  • a forward snout 16 includes an inlet opening 18 of an inlet chute 20.
  • a liquid deflector shown generally at 22, includes a curved deflector surface 24 facing an inner end 26.
  • a liquid storage region 28 is disposed below inlet chute 20 to retain entrained liquid which may enter inlet chute 20 along with air and soil.
  • a seal 30 about a perimeter of liquid deflector 22 bears sealingly against an inner surface of housing 12 to prevent passage of air, soil or moisture in a bypass path past liquid deflector 22.
  • An air opening 32 is disposed near the top of liquid deflector 22, either on top as shown, or facing liquid storage region 28, to provide a single entry for air and soil to an interior 34 of liquid deflector 22.
  • a filter 36 is disposed in liquid deflector 22 to permit air to pass therethrough toward the vacuum cleaner power unit, but to prevent the passage of soil.
  • a housing 42 includes an anterior end 44 for attachment, in conventional fashion, to a vacuum cleaner power unit (not shown).
  • a forward snout 46 of housing 42 includes an inlet opening 48 leading to an inlet chute 50.
  • a liquid separator, shown generally at 52 includes a bluff wall 54 facing an inner end 56 of inlet chute 50. It will be noted that bluff wall 54 is disposed at right angles to an axis of inlet chute 50, whereby a tendency to induce whirling motion in the vertical direction is avoided.
  • a liquid storage region 57 is disposed upstream of liquid separator 52 to contain moisture and/or soil removed from the airstream.
  • First and second side walls 58 are disposed alongside inlet chute 50 (only one side wall 58 is shown, the other is omitted from the cross section). Each side wall 58 extends toward forward snout 46 well past inner end 56.
  • An upper shelf 60 extends to the extremities of side walls 58, whereby overlying a substantial portion of the length of inlet chute 50.
  • a bottom shelf 62 extends outward from the bottom of bluff wall 54 toward forward snout 46.
  • Upper shelf 60, side walls 58 and bottom shelf 62 together, define a pocket 64 into which the air stream enters from inner end 56. The elements defining pocket 64 ensure that air, with entrained contaminants, is prevented from smooth flow toward an air opening 66 of liquid separator 52 disposed above upper shelf 60.
  • air opening 66 may relocated to a top or side surface of liquid separator 52. This positioning tends to avoid entry of entrained liquid when liquid storage region 57 is nearly full.
  • bluff wall 54 is seen to include a longitudinal turbulence fence 68 pendant from upper shelf 60.
  • longitudinal turbulence fence 68 tends to disturb corkscrew motion of air within pocket 64.
  • first and second diagonal turbulence fences 70 and 72 extend from bluff wall 54. Diagonal turbulence fences 70 and 72 disturb corkscrew motion, as well as smooth downward motion of air within pocket 64.
  • bottom shelf 62 contains a notch 74 centrally disposed therein extending from an outer edge 76 to bluff wall 54. Notch 74 permits moisture precipitated from the air stream within pocket 64 to drain into liquid storage region 57.
  • upper shelf 60 extends substantially forward of the opening of air opening 66, whereby an entry shelf 78 is formed.
  • Air opening 66 includes an inclined lateral perimeter 80, whereby a top 82 of air opening 66 juts forward over entry shelf 78.
  • An entry step 84 blocks a lower portion of air opening 66 a small distance above entry shelf 78, whereby moisture precipitated on entry shelf 78 is prevented from entering air opening 66.
  • the overhang of inclined lateral perimeter 80 over entry shelf 78 tends to prevent a vertical swirling air motion from permitting direct entry of air and moisture into air opening 66. Instead, such vertical swirling air motion tends to carry its entrained moisture into contact with entry shelf 78 before entering air opening 66. As a consequence, the entrained moisture tends to precipitate out on side wall 58.
  • At least a forward portion of liquid storage region 57 includes first and second baffle ribs 86 and 88 extending inward from housing 42.
  • Baffle ribs 86 and 88 may extend the full distance between housing 42 and inner components or, alternatively, may end short of inner components to present the equivalent of a turbulence fence.
  • Portions of baffle ribs 86 and 88 bridging between housing 42 and inner components divide the adjacent portions of liquid storage region 57 into upper and lower compartments. Such upper and lower compartments tend to reduce the tendency for swirling air motion, and thus reduce the tendency for the air flow to carry entrained moisture to air opening 66 (Fig. 2).
  • baffle ribs 86 and 88 stop short of inner components, the turbulence they generate has the same effect as the turbulence fences extending from bluff wall 54 (Figs. 2 and 3).
EP19890306732 1988-08-29 1989-07-03 Vorrichtung zum Abscheiden von Stoff aus einem Luftstrom im Staubsauger Withdrawn EP0357189A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US23782888A 1988-08-29 1988-08-29
US237828 1999-01-27

Publications (2)

Publication Number Publication Date
EP0357189A2 true EP0357189A2 (de) 1990-03-07
EP0357189A3 EP0357189A3 (de) 1991-07-17

Family

ID=22895372

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890306732 Withdrawn EP0357189A3 (de) 1988-08-29 1989-07-03 Vorrichtung zum Abscheiden von Stoff aus einem Luftstrom im Staubsauger

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EP (1) EP0357189A3 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994008501A1 (en) * 1992-10-08 1994-04-28 Vax Limited Pick-up heads for vacuum cleaners
EP0847721A2 (de) * 1996-12-11 1998-06-17 Robert Thomas Metall- und Elektrowerke Batteriebetriebener Handstaubsauger
WO2014187471A1 (en) * 2013-05-20 2014-11-27 Aktiebolaget Electrolux Handheld vacuum cleaner
CN114468879A (zh) * 2021-09-01 2022-05-13 北京顺造科技有限公司 具有回收导管的表面清洁设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1453075A1 (de) * 1963-12-07 1969-02-06 Siemens Elektrogeraete Gmbh Handstaubsauger
US4536914A (en) * 1984-03-07 1985-08-27 Cic Int'l Corp. Wet-dry vacuum cleaner
US4542557A (en) * 1984-03-07 1985-09-24 Cic Int'l. Corp. Wet-dry vacuum cleaner
GB2189382A (en) * 1986-03-10 1987-10-28 Continental Engineering Produc Vacuum cleaner

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1453075A1 (de) * 1963-12-07 1969-02-06 Siemens Elektrogeraete Gmbh Handstaubsauger
US4536914A (en) * 1984-03-07 1985-08-27 Cic Int'l Corp. Wet-dry vacuum cleaner
US4542557A (en) * 1984-03-07 1985-09-24 Cic Int'l. Corp. Wet-dry vacuum cleaner
GB2189382A (en) * 1986-03-10 1987-10-28 Continental Engineering Produc Vacuum cleaner

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994008501A1 (en) * 1992-10-08 1994-04-28 Vax Limited Pick-up heads for vacuum cleaners
GB2286113A (en) * 1992-10-08 1995-08-09 Vax Ltd Pick-up heads for vacuum cleaners
GB2286113B (en) * 1992-10-08 1996-05-01 Vax Ltd Pick-up attachments for connection to vacuum cleaner suction hoses
AU675084B2 (en) * 1992-10-08 1997-01-23 Vax Limited Pick-up heads for vacuum cleaners
US5634238A (en) * 1992-10-08 1997-06-03 Vax Limited Pick-up head for a vacuum cleaner
EP0847721A2 (de) * 1996-12-11 1998-06-17 Robert Thomas Metall- und Elektrowerke Batteriebetriebener Handstaubsauger
EP0847721A3 (de) * 1996-12-11 1999-11-03 Robert Thomas Metall- und Elektrowerke Batteriebetriebener Handstaubsauger
DE19651477C2 (de) * 1996-12-11 2000-07-20 Thomas Robert Metall Elektro Elektrischer Handstaubsauger
WO2014187471A1 (en) * 2013-05-20 2014-11-27 Aktiebolaget Electrolux Handheld vacuum cleaner
CN114468879A (zh) * 2021-09-01 2022-05-13 北京顺造科技有限公司 具有回收导管的表面清洁设备

Also Published As

Publication number Publication date
EP0357189A3 (de) 1991-07-17

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