WO2003018914A1 - Arrangement in a swirl chamber suction device - Google Patents

Arrangement in a swirl chamber suction device Download PDF

Info

Publication number
WO2003018914A1
WO2003018914A1 PCT/FI2002/000657 FI0200657W WO03018914A1 WO 2003018914 A1 WO2003018914 A1 WO 2003018914A1 FI 0200657 W FI0200657 W FI 0200657W WO 03018914 A1 WO03018914 A1 WO 03018914A1
Authority
WO
WIPO (PCT)
Prior art keywords
chamber
arrangement
air
swirl
swirl chamber
Prior art date
Application number
PCT/FI2002/000657
Other languages
French (fr)
Inventor
Mauno Ruuska
Timo Toijonen
Original Assignee
Patria Vammas Oy
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 Patria Vammas Oy filed Critical Patria Vammas Oy
Publication of WO2003018914A1 publication Critical patent/WO2003018914A1/en
Priority to NO20031392A priority Critical patent/NO20031392L/en

Links

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
    • 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
    • A47L5/14—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum cleaning by blowing-off, also combined with suction cleaning
    • 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 swirl chamber suction nozzle device furnished with at least one swirl suction chamber and being transportable on a surface to be cleaned, the swirl chamber of which device is open in regard to the surface to be cleaned, and the device comprising a blast arrangement that produces an air blast into the swirl chamber and also makes the air whirl in the chamber, and a channel arrangement for conveying air out of the swirl chambers.
  • Previously known from patent application FI-972439 is a surface cleaning device furnished with a swirl chamber, where the downward open swirl chamber is transported on the surface to be cleansed.
  • a strong air flow is conveyed down from chamber front edge and both towards the surface and to the chamber under side so that at first it hits the surface and continues then to the chamber.
  • a portion of air makes a whirling motion in the chamber and another portion leaves the chamber through the chamber rear edge into the exit channel.
  • the air that made the whirling motion gets out, at least partly, after having made a circuit in the chamber.
  • the air that has got out from the chamber and contains material loosened from the surface is conveyed to a greater chamber in the device, where the dirt material gets separated from the air and the air can be blasted through a filter back to the circulation towards the chamber.
  • the invention is characterized in that in the arrangement there is in the end wall of the swirl chamber an opening enabling air flow between open air and the chamber internal parts.
  • the advantage of the invention is that no filter is needed, when additional air is let out from the chamber through end wall openings.
  • the swirl chamber as per se works as separator of the material in the circulation, the material being drifted by the whirling motion towards the chamber walls, whereby clean air gets separated to the rotational axis of air circulation in the chamber or close to it. Exiting air is clean air close to the rotational axis. Thus additional air outlet does not cause any raise of the chamber average pressure and the suction capacity remains good.
  • figure 1 showing a diagrammatic side view of the swirl suction nozzle device.
  • Figure 1 shows the swirl suction nozzle device transportable on a surface to be cleaned and comprising wheels 9, a cylindrical chamber 8 and a blast 3 to maintain strong air circulation.
  • the air blast is conveyed from the under side of chamber 1 front edge to the chamber.
  • the blast also hits the surface to be cleaned and looses dirt, water and other material from it.
  • In the lower blast channel edge there is a clapper 7, by means of which it is possible to control the direction of blast or also the gap in regard to the surface.
  • the blast is strong and air speed high, the pressure of flowing air becomes low, lower than the air pressure, whereby, because of generated ejector impact, open air is also sucked along from front edge under side to the chamber. This is expected, since a reverse phenomenon would be hazardous for the cleaning.
  • chamber 1 rear edge By means of clapper 6 it is possible to make chamber 1 rear edge quite tight so that air cannot escape. A portion of air turns to make whirling motion into chamber 1 and another portion turns along the channel into chamber 5 and further to filter 4.
  • a slow flow is arranged by means of the extensive chamber space and therefore the material conveyed by the air flow drops to the collection space arranged at the chamber bottom (not shown).
  • an opening 2 In chamber 1 rear end there is an opening 2 through which a free flow is possible in one direction or another. Since more air comes to the arrangement, otherwise open from the under side of chamber front edge, there is a flow outward from the chamber balancing the arrangement.
  • the speed of air in the whirling motion is minor near the rotation axis and this means higher pressure at that point according to the Bernoull law. Accordingly, from opening 2 air flows outward. Most suitably there is an opening 2 in both rear ends of the swirl chamber, either concentric in regard to the cylinder axis or concentric with the rotation axis of air flow whirling in the chamber.
  • the opening is easily made in the rear end and it is also easy to arrange closing means to adjust its size, such as iris dampers. Due to air whirling the most suitable opening form is circular.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Cleaning In General (AREA)

Abstract

An arrangement in a swirl chamber suction nozzle device furnished with a swirl chamber (1) and transportable on a surface to be cleaned, where the swirl chamber (1) is restricted with a cylindrical mantle construction (8) with end walls attached to it, the swirl chamber still being open in regard to the surface to be cleaned and the nozzle device comprising a blast arrangement (3, 7) for conveying blast air to chamber (1) in order to produce a swirl flow and furthermore an arrangement (6) to convey air out from the swirl chamber. In the arrangement the swirl chamber (1) end wall has an opening (2) enabling air flow between fresh air and chamber (1) internal parts.

Description

ARRANGEMENT ΪN A SWIRL CHAMBER SUCTION DEVICE
The invention relates to a swirl chamber suction nozzle device furnished with at least one swirl suction chamber and being transportable on a surface to be cleaned, the swirl chamber of which device is open in regard to the surface to be cleaned, and the device comprising a blast arrangement that produces an air blast into the swirl chamber and also makes the air whirl in the chamber, and a channel arrangement for conveying air out of the swirl chambers.
Previously known from patent application FI-972439 is a surface cleaning device furnished with a swirl chamber, where the downward open swirl chamber is transported on the surface to be cleansed. A strong air flow is conveyed down from chamber front edge and both towards the surface and to the chamber under side so that at first it hits the surface and continues then to the chamber. A portion of air makes a whirling motion in the chamber and another portion leaves the chamber through the chamber rear edge into the exit channel. The air that made the whirling motion gets out, at least partly, after having made a circuit in the chamber. The air that has got out from the chamber and contains material loosened from the surface, is conveyed to a greater chamber in the device, where the dirt material gets separated from the air and the air can be blasted through a filter back to the circulation towards the chamber.
The problem of the above presented swirl chamber solution is that additional air arriving into circulation at the nozzle mouth has to be removed. Since the arrangement is partly closed, the amount of air corresponding to arriving air must be removed. Since in certain spots in the arrangement the circulating air is dirty, air cannot be removed at that point. It has been necessary to fit he device with a separate filter, through which the outlet air is conveyed. The filter causes some loss of pressure, and being in circulation after the chamber, it causes additional back pressure to the flow leaving the chamber. Thus the average pressure of air whirling in the chamber grows and reduces the capacity of blast.
By means of the arrangement as per this invention the removal of air entering the arrangement and realisation of the balance of air and pressure conditions of the arrangement have been solved in a new and improving way. The invention is characterized in that in the arrangement there is in the end wall of the swirl chamber an opening enabling air flow between open air and the chamber internal parts.
The advantage of the invention is that no filter is needed, when additional air is let out from the chamber through end wall openings. The swirl chamber as per se works as separator of the material in the circulation, the material being drifted by the whirling motion towards the chamber walls, whereby clean air gets separated to the rotational axis of air circulation in the chamber or close to it. Exiting air is clean air close to the rotational axis. Thus additional air outlet does not cause any raise of the chamber average pressure and the suction capacity remains good.
In the following the invention is disclosed with reference to the enclosed drawing, figure 1 , showing a diagrammatic side view of the swirl suction nozzle device.
Figure 1 shows the swirl suction nozzle device transportable on a surface to be cleaned and comprising wheels 9, a cylindrical chamber 8 and a blast 3 to maintain strong air circulation. By means of the blast the air blast is conveyed from the under side of chamber 1 front edge to the chamber. The blast also hits the surface to be cleaned and looses dirt, water and other material from it. In the lower blast channel edge there is a clapper 7, by means of which it is possible to control the direction of blast or also the gap in regard to the surface. When the blast is strong and air speed high, the pressure of flowing air becomes low, lower than the air pressure, whereby, because of generated ejector impact, open air is also sucked along from front edge under side to the chamber. This is expected, since a reverse phenomenon would be hazardous for the cleaning.
By means of clapper 6 it is possible to make chamber 1 rear edge quite tight so that air cannot escape. A portion of air turns to make whirling motion into chamber 1 and another portion turns along the channel into chamber 5 and further to filter 4. Into the suction chamber a slow flow is arranged by means of the extensive chamber space and therefore the material conveyed by the air flow drops to the collection space arranged at the chamber bottom (not shown). In chamber 1 rear end there is an opening 2 through which a free flow is possible in one direction or another. Since more air comes to the arrangement, otherwise open from the under side of chamber front edge, there is a flow outward from the chamber balancing the arrangement. Also the speed of air in the whirling motion is minor near the rotation axis and this means higher pressure at that point according to the Bernoull law. Accordingly, from opening 2 air flows outward. Most suitably there is an opening 2 in both rear ends of the swirl chamber, either concentric in regard to the cylinder axis or concentric with the rotation axis of air flow whirling in the chamber.
When due to the rear end opening 2 no pressure hardly greater than that of fresh air can originate in the middle of the chamber, which would be possible with closed ends, the chamber pressure remains low, the chamber is capable to receive new blast air and to remove it at great speed towards suction chamber 5.
At the chamber ends there is from the edge under side hardly any air leakage, since the edge can be tightened with dragging sealing means.
The opening is easily made in the rear end and it is also easy to arrange closing means to adjust its size, such as iris dampers. Due to air whirling the most suitable opening form is circular.

Claims

1. An arrangement in a swirl chamber suction nozzle device furnished with a swirl chamber (1) and transportable on a surface to be cleaned, where the swirl chamber (1) is restricted with a cylindrical mantle construction (8) with end walls attached to it, the swirl chamber still being open in regard to the surface to be cleaned and the device having a blast arrangement (3,7) for conveying blast air to chamber (1) in order to produce a swirl flow and furthermore an arrangement to convey air out of the swirl chambers, characterized in that in the arrangement the swirl chamber (1) end wall has an opening (2) enabling air flow between fresh air and the chamber (1) internal parts.
2. An arrangement according to claim 1 characterized in that opening (2) is substantially in the centre of chamber (1) end wall.
3. An arrangement according to claim 1 characterized in that opening (2) is in the rear end substantially concentric with the chamber (1) and the line of its longitudinal axis, functioning as rotation axis of swirl flow in chamber (1).
4. An arrangement according to claim 1 characterized in that the size of opening (2) can be regulated.
PCT/FI2002/000657 2001-08-08 2002-08-07 Arrangement in a swirl chamber suction device WO2003018914A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NO20031392A NO20031392L (en) 2001-08-08 2003-03-27 Arrangement by a swirl chamber suction opening device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20011613A FI111285B (en) 2001-08-08 2001-08-08 Arrangement in a swirl device with suction nozzle
FI20011613 2001-08-08

Publications (1)

Publication Number Publication Date
WO2003018914A1 true WO2003018914A1 (en) 2003-03-06

Family

ID=8561715

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2002/000657 WO2003018914A1 (en) 2001-08-08 2002-08-07 Arrangement in a swirl chamber suction device

Country Status (3)

Country Link
FI (1) FI111285B (en)
NO (1) NO20031392L (en)
WO (1) WO2003018914A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006093432A2 (en) * 2005-03-03 2006-09-08 Ismagilov Airat Gabdrakhmanovi Sweeping and cleaning device
CN106869066A (en) * 2015-12-14 2017-06-20 任树华 Simple self-priming soot blower
RU178218U1 (en) * 2017-03-06 2018-03-28 Айрат Габдрахманович Исмагилов Sweeping device
CN111441296A (en) * 2020-04-02 2020-07-24 山东交通学院 Afforestation rubbish operation electric motor car

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4707879A (en) * 1984-02-10 1987-11-24 Moszkowski Stefan J Device for acting on and treating surfaces, for instance for picking up particles, leaves and litter
GB2292882A (en) * 1994-09-07 1996-03-13 Benjamin Edginton Vacuum cleaner airflow assembly
US5884360A (en) * 1994-07-05 1999-03-23 Festo Kg Nozzle arrangement and use thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4707879A (en) * 1984-02-10 1987-11-24 Moszkowski Stefan J Device for acting on and treating surfaces, for instance for picking up particles, leaves and litter
US5884360A (en) * 1994-07-05 1999-03-23 Festo Kg Nozzle arrangement and use thereof
GB2292882A (en) * 1994-09-07 1996-03-13 Benjamin Edginton Vacuum cleaner airflow assembly

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006093432A2 (en) * 2005-03-03 2006-09-08 Ismagilov Airat Gabdrakhmanovi Sweeping and cleaning device
WO2006093432A3 (en) * 2005-03-03 2007-01-11 Airat Gabdrakhmanovi Ismagilov Sweeping and cleaning device
CN106869066A (en) * 2015-12-14 2017-06-20 任树华 Simple self-priming soot blower
RU178218U1 (en) * 2017-03-06 2018-03-28 Айрат Габдрахманович Исмагилов Sweeping device
CN111441296A (en) * 2020-04-02 2020-07-24 山东交通学院 Afforestation rubbish operation electric motor car
CN111441296B (en) * 2020-04-02 2021-05-28 山东交通学院 Afforestation rubbish operation electric motor car

Also Published As

Publication number Publication date
FI20011613A0 (en) 2001-08-08
NO20031392D0 (en) 2003-03-27
FI20011613A (en) 2003-02-09
FI111285B (en) 2003-06-30
NO20031392L (en) 2003-06-02

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