Classifications

• • E—FIXED CONSTRUCTIONS
  • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
  • E01H1/00—Removing undesirable matter from roads or like surfaces, with or without moistening of the surface
  • E01H1/08—Pneumatically dislodging or taking-up undesirable matter or small objects; Drying by heat only or by streams of gas; Cleaning by projecting abrasive particles
  • E01H1/0863—Apparatus loosening or removing the dirt by blowing and subsequently dislodging it at least partially by suction ; Combined suction and blowing nozzles
• • A—HUMAN NECESSITIES
  • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
  • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
  • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
  • A47L9/02—Nozzles
  • A47L9/08—Nozzles with means adapted for blowing

Definitions

• the invention relates to a suction nozzle device movable on a surface to be cleaned and formed at least of two swirl chambers placed one after another and in which the whirl chambers are open in regard to the surface to be cleaned and the device including a blast arrangement producing an air blast into the swirl chamber and a channel arrangement conveying air out of the swirl chamber.
• Previously known from application FI-972439 is a surfaces cleaning device with a swirl chamber, where the downward open swirl chamber is moved on the surface being cleaned.
• a strong air flow is conveyed downward from the swirl chamber front edge so that it hits at first the surface and then a part of the air makes a rotation in the chamber and another part flows out at once over the chamber rear edge to the discharge channel.
• the air that made the rotation escapes at least partly after having completed the rotation in the chamber.
• the air escaped from the chamber inclusive of material loosened from the surface is conveyed to a bigger chamber in the device, where the dirt is separated from the air an the air can be blasted back into circulation towards the chamber.
• the problem of the above presented one-chamber solution is that the strong blast, viewed from the direction of the chamber travel motion, is conveyed from the chamber front edge diagonally towards the surface, whereby dirt material gets loose from the surface and, simultaneously, the blast also sucks some extra air from under the chamber into the chamber.
• Only the blocking plate of the chamber rear edge strives to hinder that from under the blocking plate no flow returns to the recently cleaned surface.
• the blocking plate function is difficult, since the surface is not always even and smooth. It is difficult, even impossible to make a blocking plate so tight that it could manage it.
• the suction nozzle device according to this invention is characterised in that the blast air is arranged to travel from the first whirl chamber to the second whirl chamber etc., whereby the air is at least partly rotating in each whirl chamber.
• the advantage of the invention is that in using two whirl chambers, at least in the rear edge of the rearmost chamber, by means of a strong income blast from under the blocking plate into the chamber, a suction air flow is achieved to secure the cleaning result.
• the blast air is conveyed to the rearmost chamber of the suction nozzle device and from there further to the first chamber, from where the air flow is discharged together with dirt material.
• the rear edge of the first chamber must not be very tight, since the chamber from behind is capable of handling litter that has got into the chamber from under the first chamber. Mainly, the rear edge of the first chamber shall take care of the air flow including litter and escaping diagonally upward into the discharge channel.
• the rotations of air are in different directions.
• Figure 1 is a diagrammatic view of a two-chamber whirl suction nozzle.
• Figure 2 is a diagrammatic view of a three-chamber whirl suction nozzle.
• Figure 3 is a diagrammatic view of a two-chamber suction nozzle.
• Figure 1 shows a two-chamber surfaces cleaning device furnished with wheels 9, with a container 5 and with an air filtrating filter 4 placed in the front direction in front of blast apparatus 3.
• the first whirl chamber 1 is the rearmost in the travel direction and the second chamber 2 the foremost.
• the blast arrives at the first chamber from the rear edge, which has also a blocking plate 6.
• the flow strives to suck more air from under the blocking plate 6.
• the suction effect is produced by the high speed of air in the channel at blocking plate 6, which speed drops immediately after the blocking plate, when the flow arrives at the chamber.
• the sped up flow at blocking plate 6 causes a remarkable drop of pressure in the channel so that from under the blocking plate open air strives to mix with the flow.
• Blocking plate 7 steers the flow up from the surface.
• the flow circulates in the second chamber 2 and blows on the surface so that suction is generated into the chamber from under the front edge. This is not a disadvantage, on the contrary an advantage.
• Blocking plate 8 steers the flow from the surface up to the container.
• Figure 2 shows a three-chamber solution, where in the flow direction the third chamber
• Chamber 10 is placed between the first and the second chamber. Chamber 10 has blocking plates
• Figure 3 shows a three-chamber solution, where the rotations run in the same direction. The flow strives out from under the front edge of second chamber 2, but that is no disadvantage, since then the flow and the litter return again for cleaning or for further blast forward.
• Blast air can be humidified by water fog, which is sprayed into the circulating air in some proper point.
• An advantageous travel direction point to mix it with blast air is, for instance, at the second rearmost chamber, in order to prevent formation of dust .

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Nozzles For Electric Vacuum Cleaners (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=8561248

Family Applications (1)

Country Status (2)

Cited By (1)

Citations (3)

• 2001
  • 2001-05-22 FI FI20011073A patent/FI20011073A/fi unknown
• 2002
  • 2002-05-22 WO PCT/FI2002/000440 patent/WO2002095136A1/en not_active Application Discontinuation

Patent Citations (3)

Non-Patent Citations (1)

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