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
  • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
  • A47L9/02—Nozzles
  • A47L9/06—Nozzles with fixed, e.g. adjustably fixed brushes or the like
• • A—HUMAN NECESSITIES
  • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
  • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
  • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
  • A47L9/02—Nozzles
  • A47L9/08—Nozzles with means adapted for blowing
• • 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
• • 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
  • A47L9/1658—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
  • A47L9/1683—Dust collecting chambers; Dust collecting receptacles

Definitions

• TITLE A VACUUM CLEANER TECHNICAL FIELD This invention relates to a vacuum cleaner and particular to a floor vacuum cleaner for use on carpets and the like.
• Vacuum cleaners develop suction by means of a fan which discharges a powerful stream of air from the rear end of the casing. This sets up a powerful inflowing current of air which carries along any dust particles from the carpet or floor to which a suction nozzle is applied.
• the fan has a large number of blades set at an angle, the rotation setting up a flow of air in the axial direction.
• the air stream is passed through a bag in which the dust is precipitated and collected without appreciably obstructing the air flow.
• vacuum cleaners One disadvantage with vacuum cleaners is that the entire volume of air passes into the dust collecting chamber and must pass through the walls of the dust bag. Should the dust bag become too full or clogged, this will reduce the efficiency of the vacuum cleaner and can result in damage to the vacuum cleaner itself.
• the efficiency of the vacuum cleaner is dependent upon two factors being the air flow rate and the suction power.
• the suction performance is the product of two factors. Thus, when the flow rate is maximum, the suction is low and conversely when suction is high, the flow rate is low. For a vacuum cleaner to function efficiently, it is necessary for both the suction and the flow rate to be adequate.
• the present invention is directed to a vacuum cleaner which can overcome the abovementioned disadvantages or provide the public with a useful or commercial choice.
• the invention resides in a vacuum cleaner head comprising a curved body about which fluid can circulate, the curved body having a lower portion which in use is adapted to be adjacent the area to be vacuumed, the lower portion being dimensioned to provide a lower pressure surface, the curved body also having an upper portion dimensioned to provide a higher pressure surface, fluid acceleration means to accelerate the fluid about the curved body, a fluid stream splitter in the upper portion of the curved body to split the fluid into a recirculated portion which continues to move about the curved body, and a waste portion which passes into a dust collecting chamber and is exhausted therefrom.
• the curved body may be in the form of a doughnut or toroid.
• the curved body need not be symmetrical and may be slightly elliptical in cross- section.
• the curved body need not be entirely curved, and portions of the curved body may be straight if desired.
• the fluid acceleration means is positioned in a lower portion of the central passageway, that is the portion closer towards the carpet or ground surface to be cleaned.
• the fluid acceleration means may itself comprise a fan which can be of the bladed type.
• the fan may be driven by a motor such as an electric motor and this may be positioned above the fan and within the central passageway.
• the motor may be housed within a sealed compartment within the central passageway there being sufficient room to allow fluid to circulate about the curved body and between the curved body and the housing in which the motor is positioned.
• the lower end of the curved body may have a blowing slot. If the curved body is a doughnut or toroidal shape, the lower end of the passageway may be sealed off with just a small, typically annular slot being present to allow fluid to blow through the slot and over the low pressure surface.
• the upper portion of the curved body has a fluid stream splitter which may comprise a disc or a curved member.
• the splitter can divide the fluid into a portion which recirculates about the curved body, and a split off waste portion which passes into a dust collecting chamber.
• the fluid acceleration means is positioned in the central passageway below the fluid splitter and above the fluid blowing slot.
• FIG. 1 there is shown a vacuum cleaner head 10 to which a handle 11 can be attached in the usual manner, the handle not forming any part of the invention.
• Vacuum cleaner head has an outer housing 12 which can be made from plastic or metal.
• Outer housing 12 can be made from plastic or metal.
• a curved body 15 in the form of a doughnut or toroid.
• Body 15 can be mounted inside the housing using connecting struts (not shown) or other types of mountings.
• Body 15 by being doughnut or toroidal in shape has a central passageway 16.
• Body 15 also has a lower portion 17, an upper portion 18, an inner portion 19 and an outer portion 20.
• Fan 21 Inside central passageway 16 is an air acceleration means in the form of a bladed fan 21.
• Fan 21 has a number of blades 22 attached to a hub 23 the hub being attached to a shaft 24 which is driven by a motor 25.
• Motor 25 is housed within a housing 26 to protect it from dust and debris and also to silence the motor.
• the fan is preferably of a design which is described in my earlier international patent application PCT/AU93/00581.
• Plate 27 (which could be an extension of hub 23 or a separately formed plate) .
• Plate 27 extends across the lower portion of central passageway 16 but is spaced inwardly from the inner ends of body 15 to define an annular blowing slot 28.
• the blowing slot ensures that fluid is blown over the lower pressure surface area 17 and by virtue of the fluid being blown through slot 28, it will adhere to curved body 15 and will follow the surface of the body by virtue of the coanda effect.
• Fluid splitter 31 can be seen as an annular shoulder and it functions to split the fluid into a recirculating portion which moves back into central passage 16 and a waste portion which will contain most of the dirt dust and the fresh air.
• the waste portion passes over the top of fluid splitter 31 and into a collection chamber 32.
• the collection chamber 32 is positioned above central passageway 16 and may include a removable dirt or dust bag. Excess air passes through opening 33 which contains a filter screen to allow air to exhaust while preventing any dirt or dust from doing the same.
• the dirt or dust which passes up through internal passage 30 is heavier than the air circulating about curved body 15 and has too much momentum to pass under fluid splitter 31.
• the dirt and dust therefore passes over the top of fluid splitter 31 and into dust collection chamber 32.
• Waste air passes through opening 33 which has a filter extending across it.
• annular blowing slot 28 blows fluid over a surface 15 of convex curvature and increasing surface area 17. In passing over this surface at high speed, adjacent air is entrained into the flow carrying with it the particulate matter to be discarded.
• the air plus particulate matter enters the internal passageway 30 and passes up through the passageway to annular shoulder (or fluid splitter) 31.
• the curve of the shoulder can be designed to be too tight
• Table 1 shows a comparison between a conventional vacuum cleaner and a vacuum cleaner the subject of this invention.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Nozzles For Electric Vacuum Cleaners (AREA)
• Separating Particles In Gases By Inertia (AREA)
• Jet Pumps And Other Pumps (AREA)
• Filters For Electric Vacuum Cleaners (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=3789517

Family Applications (1)

Country Status (9)

Families Citing this family (3)

Family Cites Families (4)

• 1995
  • 1995-09-04 AU AUPN5189A patent/AUPN518995A0/en not_active Abandoned
• 1996
  • 1996-09-04 WO PCT/AU1996/000547 patent/WO1997008983A1/en not_active Ceased
  • 1996-09-04 CN CN96196735A patent/CN1195274A/zh active Pending
  • 1996-09-04 BR BR9610364A patent/BR9610364A/pt not_active Application Discontinuation
  • 1996-09-04 DE DE0850009T patent/DE850009T1/de active Pending
  • 1996-09-04 JP JP9510697A patent/JPH11514896A/ja active Pending
  • 1996-09-04 EP EP96928277A patent/EP0850009A4/de not_active Withdrawn
  • 1996-09-04 CA CA002231001A patent/CA2231001A1/en not_active Abandoned
  • 1996-09-04 KR KR1019980701615A patent/KR19990044371A/ko not_active Withdrawn

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