EP3727119A1 - Appareil de nettoyage de l'air comportant un séparateur à empilement de disques - Google Patents

Appareil de nettoyage de l'air comportant un séparateur à empilement de disques

Info

Publication number
EP3727119A1
EP3727119A1 EP17828904.7A EP17828904A EP3727119A1 EP 3727119 A1 EP3727119 A1 EP 3727119A1 EP 17828904 A EP17828904 A EP 17828904A EP 3727119 A1 EP3727119 A1 EP 3727119A1
Authority
EP
European Patent Office
Prior art keywords
separation chamber
appliance
dust
dust separation
air
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.)
Pending
Application number
EP17828904.7A
Other languages
German (de)
English (en)
Inventor
Johann Zita
Henrik Holm
Johan SPÅNG
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.)
Electrolux AB
Original Assignee
Electrolux AB
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 Electrolux AB filed Critical Electrolux AB
Publication of EP3727119A1 publication Critical patent/EP3727119A1/fr
Pending legal-status Critical Current

Links

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
    • A47L9/10—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B5/00—Other centrifuges
    • B04B5/12—Centrifuges in which rotors other than bowls generate centrifugal effects in stationary containers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/08—Vortex chamber constructions
    • B04C5/103—Bodies or members, e.g. bulkheads, guides, in the vortex chamber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B5/00—Other centrifuges
    • B04B5/12—Centrifuges in which rotors other than bowls generate centrifugal effects in stationary containers
    • B04B2005/125—Centrifuges in which rotors other than bowls generate centrifugal effects in stationary containers the rotors comprising separating walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks
    • B04C2009/007—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks with internal rotors, e.g. impeller, ventilator, fan, blower, pump
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks
    • B04C2009/008—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks with injection or suction of gas or liquid into the cyclone

Definitions

  • the invention relates to an appliance for cleaning an airflow comprising a dust separator.
  • An object of the invention is to solve, or at least mitigate, this problem in the art and thus provide an improved dust separator for an air-cleaning appliance.
  • an appliance configured to clean an airflow comprising a dust separator, which dust separator comprises a dust separation chamber comprising, an air inlet where an airflow to be cleaned enters the dust separation chamber, an air outlet where the cleaned airflow exits the dust separation chamber, a shaft arranged along a longitudinal axis of the dust separation chamber, and a plurality of spaced apart disc members arranged along the shaft, the shaft being arranged to rotate the disc members in order to cause a centrifugal force which transports particles contained in the airflow entering the air inlet towards an inner wall of the dust separation chamber, while causing the airflow to move towards a centre of the spaced apart disc members for travelling towards the air outlet and exit the dust separation chamber.
  • a dust separator comprises a dust separation chamber comprising, an air inlet where an airflow to be cleaned enters the dust separation chamber, an air outlet where the cleaned airflow exits the dust separation chamber, a shaft arranged along a longitudinal axis of the dust separation chamber, and a plurality of spaced apart disc members arranged
  • the centrifugal force created by the rotating disc members will cause cleaned air to exit the air outlet while dust and debris collides with the inner wall of the dust separation chamber and fall towards a bottom section of the chamber by means of gravity.
  • the dust separator is typically referred to as a disc stack separator, a disc bowl centrifuge or a conical plate centrifuge.
  • the inventors have discovered that the disc separator when implemented in an appliance such as a vacuum cleaner is more energy- efficient as compared to a cyclonic separator for attaining the same
  • the dust separation will advantageously be improved, and any filter(s) located downstream of the dust separator - which typically are present in the case of a vacuum cleaner - will not be clogged, and a user will thus not have to manually clean these filters.
  • the dust separation chamber is arranged with one or more openings in a section of the chamber where one of the disc members faces the air outlet, wherein air is entered into the dust separation chamber via the openings in order to counter an airflow flowing from the air inlet, via a bypass path created between said one of the disc members and the section, to the air outlet.
  • the dust separator is at negative pressure relative to the atmosphere, which negative pressure is created by a motor fan. This has as an effect that air will flow through the openings and thus advantageously counter any air flowing in the bypass path.
  • dust and debris entering the chamber via the air inlet will eventually contact the disc members and be transported towards the inner wall of the chamber by the centrifugal force caused by the rotating disc members.
  • this will increase the particle-separation performance of the dust separator while decreasing the energy required to rotate the shaft, as compared to a solution where for instance a an annular flange is used to seal the bypass path.
  • a top section of the dust separation chamber is removably attached to a main body of the chamber.
  • the air inlet and the air outlet being arranged such that the airflow entering the air inlet is substantially perpendicular to the airflow exiting the dust separation chamber via the air outlet.
  • the air outlet is aligned with a longitudinal axis of the dust separation chamber extending at the centre of the plurality of disc members.
  • the dust separator further comprises a motor arranged to be in connection with the shaft for rotating the shaft and the disc members.
  • the shaft is arranged to extend longitudinally inside the air outlet.
  • the dust separator further comprises at least one bearing arranged around the shaft and is further arranged to be held in place by bearing brackets attached to an inner wall of the air outlet.
  • the dust separator further comprises a further air inlet arranged along a periphery of the shaft inside the air outlet and ending at the bearing, via which air advantageously is entered in order to clean the bearing.
  • Figure 1 illustrates a cross-sectional view of a dust separator according to an embodiment
  • FIG. 2 illustrates a vacuum cleaner in perspective view, in which the dust separator may be implemented according to an embodiment
  • Figure 3 illustrates a cross-sectional view of an upright vacuum cleaner of the type shown in Figure 2, in which the dust separator is implemented according to an embodiment
  • Figure 4a illustrates a cross-sectional view of the dust separator according to another embodiment
  • Figure 4b illustrates the dust separator of Figure 4a, with a top section removed;
  • Figure 5 illustrates a top view of the dust separator of Figure 4a
  • Figure 6 illustrates a cross-sectional view of the dust separator according to a further embodiment
  • Figure 7 illustrates a top view of the dust separator of Figure 6.
  • Figure 1 illustrates a cross-sectional view of a dust separator 10 according to an embodiment, to be implemented in an appliance for cleaning an air flow, such as a vacuum cleaner or an air cleaner.
  • the dust separator 10 may be a part of a separation system comprising e.g., a cyclonic pre-separator for separating larger particles before the airflow to be cleaned is passed through a mesh filter and enters the dust separator 10. Further, one or more post-filters may be used after the dust separator 10. However, in the following, the dust separator 10 will be discussed.
  • the dust separation will advantageously be improved, and filter(s) located
  • the dust separator 10 comprises a dust separation chamber 11 having an air inlet 12 where an airflow to be cleaned enters the dust separation chamber 11, and an air outlet 13 where the cleaned airflow exits the dust separation chamber 11.
  • the dust separator 10 comprises a shaft 14 arranged along a longitudinal axis of the dust separation chamber 11, and a plurality of spaced apart disc members 15 arranged along the shaft 14.
  • the shaft 14 is typically rotated by a motor (not shown) which in its turn rotates the disc members 15 in order to cause a centrifugal force which transports particles - i.e. dust and debris - contained in the airflow entering the air inlet 12 towards an inner wall of the dust separation chamber 11, while causing the airflow to travel towards a centre of the spaced apart disc members 15 for travelling in an upwards direction along the shaft 14 towards the air outlet 13 for exiting the dust separation chamber 11.
  • a motor not shown
  • the centrifugal force created by the rotating disc members 15 will cause cleaned air to exit the air outlet 13 aligned with the centre of the spaced apart disc members 15 while dust and debris collides with the inner wall of the dust separation chamber 11 and fall towards a bottom section of the chamber 11 by means of gravity.
  • the dust separator 10 illustrated in Figure 1 is typically referred to as a disc stack separator, a disc bowl centrifuge or a conical plate centrifuge.
  • the inventors have discovered that the disc separator 10 illustrated with reference to Figure 1 is more energy-efficient as compared to a cyclonic separator for attaining the same separation performance and is further smaller in size.
  • FIG. 2 illustrates a vacuum cleaner 1 in perspective view, in which the dust separator 10 may be implemented according to an embodiment.
  • This particular type of vacuum cleaner is known as an upright cleaner or stick cleaner.
  • the vacuum cleaner may be powered by a chargeable battery, an electric cable or a combination of the two.
  • the vacuum cleaner 1 comprises a housing 2.
  • the housing 2 may be made as a hollow body or structure for housing some parts of the vacuum cleaner 1, such as the dust separator of Figure 1.
  • the housing 2 may comprise a motor fan for generating airflow.
  • a schematic airflow and a schematic motor fan are illustrated in Figure 3.
  • the housing 2 also comprises the air outlet 13 of the dust separator and a housing air inlet, also illustrated in Figure 3.
  • the vacuum cleaner 1 further comprises a profile 3 to which the housing 2 is attached.
  • the profile 3 may be of a telescopic type such that the length of the profile 3 can be adjusted.
  • the profile 3 extends between a nozzle 4 in one end and a handle 5 in the other to be held by a user for moving the vacuum cleaner over a surface to be cleaned.
  • the handle 5 may optionally comprise a control arrangement 51, e.g. a push button or a slider, for control of at least one of a fan effect, a nozzle function or any other vacuum cleaner function which may need to be adjustable.
  • Figure 3 illustrates a cross-sectional view of an upright vacuum cleaner 1 of the type shown in Figure 2, in which the dust separator 10 is implemented according to an embodiment in the housing 2.
  • the housing 2 comprises a motor fan 7 for generating an airflow and may further comprise one or more filters 8.
  • the dust separation chamber 11 of the dust separator 10 is arranged within the housing 2, and the air inlet 12 of the chamber 11 is in fluid communication with the interior of the profile 3.
  • the motor fan 7 is capable of building up a negative pressure, thereby causing an airflow 21 to flow from an air inlet 22 at the nozzle 4 to the housing air outlet 13 via the housing air inlet 12 in an opening in the profile.
  • Figure 4a illustrates a cross-sectional view of the dust separator 10 according to another embodiment.
  • annular flange will cause friction to the upper one of the rotating disc members 15 which it contacts and will thus require increased energy consumption of a motor rotating the shaft 14. To the contrary, should such an annular flange be arranged such that it does not contact the upper one of the disc members 15, there will still be a small gap where dirty air will bypass the disc members 15.
  • the dust separation chamber 11 is arranged with one or more openings 17a, 17b in a top section of the chamber 11 where the disc members 15 faces the air outlet 13. It should be noted that the top section of the chamber 11, in which the openings 16a, 16b are arranged, is removably arranged to a main body of the chamber 11, as can be seen in Figure 4b where the top section is removed from the main body for emptying the dust separation chamber 11.
  • the dust separator 10 is at negative pressure relative to the atmosphere, which negative pressure is created by the motor fan 7 illustrated in Figure 3.
  • This has as an effect that air will flow through the openings 17a, 17b and thus advantageously counter any air flowing in the bypass path 16a, 16b.
  • dust and debris entering the chamber 11 via the air inlet 11 will eventually contact the disc members 15 and be transported towards the inner wall of the chamber 11 by the centrifugal force caused by the rotating disc members 15.
  • this will increase the particle- separation performance of the dust separator 10 while decreasing the energy required to rotate the shaft 14.
  • the air can be supplied through the openings 17a, 17b from an outlet of the fan 7. It may be envisaged that the airflow applied to flow through the openings 17a, 17b may be controlled by a device such as valve (not shown).
  • FIG 5 illustrates a top view of the dust separator 10 of Figure 4 having a cylindrically-shaped dust separation chamber 11, where the shaft 14 extends longitudinally inside the air outlet 13.
  • four openings 17a, 17b, 17c, I7d are annularly arranged in the section of the chamber 11 where the air outlet 13 is arranged.
  • the dust separator may have a different structure than that shown in the Figures.
  • the air outlet n could alternatively be arranged in a bottom section of the dust separation chamber n.
  • Figure 6 illustrates a cross-sectional view of the dust separator 10 according to a further embodiment
  • Figure 7 illustrates a top view of the dust separator 10 of Figure 6.
  • At least one bearing 18 is arranged around the shaft 14, which bearing 18 is held in place by bearing brackets 19 attached to an inner wall of the air outlet 13.
  • the dust separator 10 will be configured to comprise a further air inlet 20 arranged along a periphery of the shaft 14 inside the air outlet 13 and ending at the bearing 18. A small amount of air will be entered into said further air inlet 20 for cleaning the bearing 18, i.e. for removing any dust and debris adhering to the bearing 18.
  • the further air inlet 20 arranged along the periphery of the shaft 14 inside the air outlet 13 is advantageous even though no bearing(s) would be used, for instance, air may be entered into further air inlet 20 in order to counter any particles exiting the dust separation chamber 11 via the outlet 14 (which could enter one or more motors located downstream of the chamber 11.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)

Abstract

L'invention concerne un appareil de nettoyage d'un courant d'air qui comporte un séparateur de poussière (10), celui-ci (10) comprenant une chambre de séparation de poussière (11) comportant une entrée d'air (12) par où un courant d'air à nettoyer entre dans la chambre de séparation de poussière (11) ; une sortie d'air (13) par où le courant d'air nettoyé sort de la chambre de séparation de poussière (11) ; un arbre (14) disposé le long d'un axe longitudinal de la chambre de séparation de poussière (11) ; une pluralité d'éléments de disque espacés (15), disposés le long de l'arbre (14), l'arbre (14) étant disposé pour faire tourner les éléments de disque (15) afin de provoquer une force centrifuge qui transporte des particules contenues dans le courant d'air entrant dans l'entrée d'air (12) vers une paroi interne de la chambre de séparation de poussière (11), tout en amenant le courant d'air à se déplacer vers un centre des éléments de disque espacés (15) afin de se déplacer vers la sortie d'air (13) et de sortir de la chambre de séparation de poussière (11).
EP17828904.7A 2017-12-21 2017-12-21 Appareil de nettoyage de l'air comportant un séparateur à empilement de disques Pending EP3727119A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2017/084098 WO2019120544A1 (fr) 2017-12-21 2017-12-21 Appareil de nettoyage de l'air comportant un séparateur à empilement de disques

Publications (1)

Publication Number Publication Date
EP3727119A1 true EP3727119A1 (fr) 2020-10-28

Family

ID=60957287

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17828904.7A Pending EP3727119A1 (fr) 2017-12-21 2017-12-21 Appareil de nettoyage de l'air comportant un séparateur à empilement de disques

Country Status (3)

Country Link
EP (1) EP3727119A1 (fr)
CN (1) CN111417332B (fr)
WO (1) WO2019120544A1 (fr)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1503601A1 (de) * 1965-02-13 1969-03-06 Siemens Elektrogeraete Gmbh Einrichtung zum Erzeugen einer Drehstroemung
FR2476505A1 (fr) * 1980-02-21 1981-08-28 Ermap Depoussiereur du type cyclone dynamique pour fluides gazeux
US5229014A (en) * 1991-12-18 1993-07-20 Vortech International, Inc. High efficiency centrifugal separation apparatus and method using impeller
CN2366191Y (zh) * 1999-04-06 2000-03-01 柏智勇 旋风层筛分离器
SE534773C2 (sv) * 2010-04-09 2011-12-13 Alfa Laval Corp Ab Centrifugalseparator anordnad inuti en förbränningsmotor
CN101954317B (zh) * 2010-10-22 2012-07-04 华中科技大学 径向喷射规整旋流分离器
EP2735351B1 (fr) * 2012-11-23 2014-12-31 Alfa Laval Corporate AB Séparateur centrifuge pour séparer des particules présentes dans un courant de gaz
CN204122264U (zh) * 2014-08-21 2015-01-28 山东科技大学 一种自驱动螺旋卸料的旋流器
CN204862986U (zh) * 2015-07-30 2015-12-16 博世电动工具（中国）有限公司 旋风式吸尘器
CN106238232A (zh) * 2016-09-21 2016-12-21 广东石油化工学院 带旋翼片及防返混锥的旋分器
CN106975576B (zh) * 2017-02-24 2023-04-11 神通科技集团股份有限公司 一种可调旋风分离器

Also Published As

Publication number Publication date
WO2019120544A1 (fr) 2019-06-27
CN111417332A (zh) 2020-07-14
CN111417332B (zh) 2022-03-11

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