WO2004100753A1 - Aspirateur comprenant un dispositif de nettoyage par ultrasons pour filtre ceramique - Google Patents

Aspirateur comprenant un dispositif de nettoyage par ultrasons pour filtre ceramique Download PDF

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Publication number
WO2004100753A1
WO2004100753A1 PCT/EP2004/005308 EP2004005308W WO2004100753A1 WO 2004100753 A1 WO2004100753 A1 WO 2004100753A1 EP 2004005308 W EP2004005308 W EP 2004005308W WO 2004100753 A1 WO2004100753 A1 WO 2004100753A1
Authority
WO
WIPO (PCT)
Prior art keywords
ceramic filter
particles
air
vibration generator
vacuum cleaner
Prior art date
Application number
PCT/EP2004/005308
Other languages
German (de)
English (en)
Inventor
Wolfgang Kemmerzell
Albert Kleinhenz
Michael Krammer
Thomas Strehler
Georg Schwalme
Original Assignee
BSH Bosch und Siemens Hausgeräte GmbH
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 BSH Bosch und Siemens Hausgeräte GmbH filed Critical BSH Bosch und Siemens Hausgeräte GmbH
Publication of WO2004100753A1 publication Critical patent/WO2004100753A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • 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
    • A47L9/20—Means for cleaning filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/42—Auxiliary equipment or operation thereof
    • B01D46/44—Auxiliary equipment or operation thereof controlling filtration
    • B01D46/446—Auxiliary equipment or operation thereof controlling filtration by pressure measuring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/42—Auxiliary equipment or operation thereof
    • B01D46/48—Removing dust other than cleaning filters, e.g. by using collecting trays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/66—Regeneration of the filtering material or filter elements inside the filter
    • B01D46/74—Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element
    • B01D46/76—Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element involving vibrations
    • B01D46/762—Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element involving vibrations involving sonic or ultrasonic waves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2279/00—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses
    • B01D2279/55—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses for cleaning appliances, e.g. suction cleaners

Definitions

  • Vacuum cleaner with an ultrasonic cleaning device for
  • the invention relates to a device for separating particles from air, in particular for filtering out dust in a vacuum cleaner according to the preamble of claim 1.
  • a vacuum cleaner with a housing and a blower which has a dust separator and a dust collection unit. Air is led from the vacuum cleaner nozzle into an inlet chamber of the dust separator via a suction hose. The air directed into the inlet chamber can escape from the inlet chamber via an outlet chamber which has a multiplicity of small holes.
  • the outlet chamber has a vertically arranged cylindrical filter which is arranged concentrically within the outlet chamber.
  • the cylindrical filter can be made of ceramic material.
  • a particular disadvantage is that the dust particles deposited on the ceramic filter block the passage openings in the ceramic filter with increasing operating time. The more dust particles are deposited on the ceramic filter, the greater the pressure drop on the ceramic filter. A high pressure drop on the ceramic filter caused by high dust accumulation deteriorates the efficiency of the vacuum cleaner and thus the cleaning result on the surfaces to be vacuumed.
  • the object of the invention is to develop a generic device such that a high suction power and thus a high efficiency of the device is maintained over a long period of time. This is to be achieved in particular by keeping the pressure drop across the ceramic filter as low as possible.
  • the device has a cleaning device for the acoustic removal of the particles attached to the ceramic filter. By vibrating the filter ceramic, particles that have penetrated into the pores of the ceramic filter on the upstream surface of the ceramic filter and in particular dust can be cleaned off the ceramic filter. By cleaning the particles or the dust from the ceramic filter, the pores of the ceramic filter are released. If the passage openings or the passage channels in the ceramic filter are largely free of accumulated particles, there is no unnecessary pressure drop on the ceramic filter. The efficiency of the device is high due to the low pressure drop at the ceramic filter after removal of the deposited particles. The suction power is maintained over a long period.
  • the means for acoustically exciting the ceramic filter is preferably an oscillation generator that can be operated at a frequency outside the resonance frequency of the ceramic filter.
  • an oscillation generator that can be operated at a frequency outside the resonance frequency of the ceramic filter.
  • the frequency at which the ceramic filter is excited to vibrate should not correspond to the resonance frequency of the ceramic filter in order to avoid destruction of the ceramic filter.
  • the vibration generator should preferably be able to be operated at a frequency that is significantly above the resonance frequency of the ceramic filter. Another favorable effect is that the particles deposited on or in the ceramic filter are additionally comminuted by the high oscillation frequency, which makes cleaning the ceramic filter easier.
  • the vibration generator can be operated intermittently. By intermittently operating the vibration generator, a good cleaning effect is achieved and the vibration generator is operated in an energy-efficient manner. Depending on the deposited particles, removal with intermittent operation of the oscillation generator can be more effective than continuous operation of the oscillation generator.
  • the vibration generator can be mechanically coupled to the ceramic filter.
  • the vibration generator can be connected to the ceramic filter via at least one coupling plate. The direct mechanical coupling of the vibration generator to the ceramic filter has the advantage that the vibration energy generated by the vibration generator can be transmitted to the ceramic filter largely without loss.
  • a metal plate can be provided as the coupling plate, which is glued to one side of the brittle ceramic filter.
  • the vibration generator preferably generates vibrations in one
  • Ultrasonic frequency In order to be able to remove particles with a very small diameter from the ceramic filter, it is particularly effective to use the vibration generator in one
  • the vibration generator In an inexpensive embodiment of the vibration generator, it is designed as a piezo element.
  • Piezo elements are simple electronic components that can be used inexpensively.
  • piezo elements have the advantage that they can be operated electrically without any problems.
  • the device with a cleaning device according to the invention can have a control with a switching device for starting or stopping the cleaning operation of the cleaning device.
  • the switching device switches on the basis of an output signal which is dependent on a differential pressure between the upstream surface and the downstream surface of the ceramic filter.
  • the pressure drop across the ceramic filter can be reliably determined by measuring the differential pressure between the upstream surface and the downstream surface of the ceramic filter. If a predetermined threshold value for the pressure drop across the ceramic filter is reached, the sensor sends an output signal to the switching device in order to start the cleaning device by means of the control.
  • the senor can continuously measure the pressure difference between the upstream surface and the downstream surface of the ceramic filter and, when a lower threshold value for the pressure drop across the ceramic filter has been reached, is activated Deliver the output signal to the switching device and use the control to end the ongoing cleaning operation.
  • the device or the cleaning device can have a collecting container for the particles removed in the ceramic filter.
  • a collecting container is preferably arranged below the ceramic filter in the direction of gravity.
  • the ceramic filter is set in vibration and the attached particles are detached from the ceramic filter.
  • the detached particles fall down due to gravity.
  • the particles falling off the ceramic filter can fall directly into the collecting container. This has the advantage that separate conveying means for transporting detached particles into a collecting container can be omitted.
  • the device can make sense for the device to have a conveying means arranged between the ceramic filter and the collecting container for transporting the particles detached from the ceramic filter into the collecting container.
  • a conveying device can be particularly useful if, for example, the collecting container is not to be arranged below the ceramic filter for design reasons.
  • the conveying means arranged between the ceramic filter and the collecting container the detached particles which have fallen down due to gravity can be transported into the collecting container, even if this is arranged, for example, at a higher level than the ceramic filter.
  • the particles can in particular be transported against gravity.
  • a method according to the invention for separating particles from air, in particular for filtering out dust in a vacuum cleaner is characterized by the following steps. First, dust-laden air is sucked in through an inlet opening in a housing of a vacuum cleaner. The sucked-in dust-laden air is conveyed through a ceramic filter arranged in the vacuum cleaner. The particles or dust accumulate on the upstream surface of the ceramic filter. The cleaned air is then blown out of the vacuum cleaner from an outlet opening in the housing. The ceramic filter accumulated particles or the dust can then be cleaned by acoustic excitation of the ceramic filter at a frequency outside the resonance frequency of the ceramic filter.
  • the acoustic excitation of the ceramic filter can preferably take place by means of a vibration generator, in particular by means of a piezo element.
  • the schematic illustration shown in the figure shows a housing 1 of a vacuum cleaner.
  • An intermediate wall 2 extends within the housing and separates the housing 1 into a blower chamber 3 and a dust chamber 4.
  • the intermediate wall 2 has an opening section 5 through which suction air is drawn in from the dust chamber 4 into the blower chamber 3.
  • the opening section 5 is covered by a ceramic filter 6.
  • the ceramic filter 6 has an open-pore structure and can be produced, for example, as a foam ceramic in known processes.
  • the ceramic filter 6 can be detachably fastened in the housing 1.
  • a removal opening 7 can be formed on the housing 1, through which the detachable ceramic filter 6 can be removed from the housing 1.
  • the ceramic filter 6 is designed as a flat filter.
  • the ceramic filter 6 can also be designed as a hollow chamber filter (not shown). If the ceramic filter 6 is designed like a hollow chamber, the inner wall of the ceramic can form the bounding walls of the dust chamber 4. Dust-laden air can enter the dust chamber 4 via an inlet opening 8.
  • the inlet opening 8 is formed by a coupling piece arranged in a dust chamber cover, to which a suction hose with a telescopic tube and nozzle can be connected (not shown).
  • the bottom surface and parts of the side wall of the dust chamber 4, which are located below the ceramic filter 6, form a collecting container 9 for particles 10.
  • a motor / blower unit 11 is arranged within the blower chamber 3.
  • the motor / blower unit 11 has an electric drive motor 12, the drive shaft 13 of which carries an impeller 14.
  • the impeller 14 fluidically separates the blower chamber 3 into a vacuum chamber 15 and an overpressure chamber 16.
  • the vacuum chamber 15 is fluidically on a downstream surface 17 of the Ceramic filter 6 connected. Because of the negative pressure generated in the vacuum chamber 15 by the motor / blower unit 11, air laden with particles or dust is sucked into the dust chamber 4 via the inlet opening 8.
  • the suction air flow is sucked through the open-pore ceramic filter 6 into the vacuum chamber 15. Due to the small pore size of a few micrometers of the ceramic filter 6, the particles 10 are retained in the dust chamber 4 without being able to pass through the ceramic filter 6.
  • the particles 10 accumulate on an upstream surface 18 of the ceramic filter 6.
  • the suction air stream freed from particles 10 passes via the impeller 14 from the negative pressure space 15 into the positive pressure space 16.
  • the air cleaned of particles is blown out of the device via an outlet opening 19.
  • air cleaned of particles is thus conveyed in a flow channel 20 from the downstream surface 17 of the ceramic filter 6 for blowing out to the inlet opening 19.
  • a conveying means 30 can be arranged between the ceramic filter 6 and the collecting container 9 in order to transport the particles 10 detached from the ceramic filter 6 into the collecting container 9.
  • a vibration generator 31 is coupled to the ceramic filter 6 via an acoustic coupling plate 32. Ultrasonic vibrations generated by the vibration generator 31 are transmitted to the ceramic filter 6 via the coupling plate 32.
  • the coupling plate 31 is not absolutely necessary, since the ultrasonic vibrations generated by the vibration generator 31 can also be transmitted to the ceramic filter 6 by air.
  • the vibration generator 31 is preferably designed as a piezo element. This is connected to a switching device 34, which puts the vibration generator 31 into operation or switches off an ongoing operation.
  • the switching device is automatically switched on or off by a control 33.
  • a sensor 35 which delivers an output signal to the controller, serves as the input signal for the controller 33.
  • the sensor 35 measures a first pressure on the upstream surface 18 of the ceramic filter 6 and a second pressure on the downstream surface 17 of the ceramic filter 6.
  • the sensor 35 determines from the first pressure and the second pressure a pressure difference which is sent to the controller 33 as an input variable is forwarded.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

L'invention concerne un système servant à séparer les particules (10) en suspension dans l'air, en particulier à filtrer la poussière dans un aspirateur, ce système comprenant un boîtier (1) contenant un groupe moteur/ventilateur (11) pour aspirer l'air chargé en particules par une ouverture d'entrée (8), acheminer cet air à travers un filtre céramique (6), les particules se déposant sur la surface côté flux entrant (18) de ce filtre céramique, et évacuer côté flux sortant l'air épuré par une ouverture de sortie (19). Selon l'invention, pour que ce système présente une puissance d'aspiration élevée et par là même un grand rendement pendant une durée prolongée, ledit système comprend un dispositif de nettoyage (31) servant à évacuer de façon acoustique les particules (10) déposées sur le filtre céramique (6). Une chute de pression réduite est ainsi produite au niveau du filtre céramique (6) après évacuation des particules (10) déposées sur celui-ci et le rendement du système est élevé. La puissance d'aspiration est maintenue pendant une durée prolongée.
PCT/EP2004/005308 2003-05-15 2004-05-17 Aspirateur comprenant un dispositif de nettoyage par ultrasons pour filtre ceramique WO2004100753A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10321921.8 2003-05-15
DE10321921A DE10321921A1 (de) 2003-05-15 2003-05-15 Staubsauger mit einer Utraschall-Reinigungsvorrichtung für Keramikfilter

Publications (1)

Publication Number Publication Date
WO2004100753A1 true WO2004100753A1 (fr) 2004-11-25

Family

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Application Number Title Priority Date Filing Date
PCT/EP2004/005308 WO2004100753A1 (fr) 2003-05-15 2004-05-17 Aspirateur comprenant un dispositif de nettoyage par ultrasons pour filtre ceramique

Country Status (2)

Country Link
DE (1) DE10321921A1 (fr)
WO (1) WO2004100753A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104014205A (zh) * 2014-06-21 2014-09-03 陕西华嘉机电设备有限公司 一种空气滤网振动自清洁方法及装置
CN105763104A (zh) * 2016-04-07 2016-07-13 苏州工业园区职业技术学院 一种用于磁悬浮电机的气动式隔尘装置
WO2017045857A1 (fr) * 2015-09-17 2017-03-23 Robert Bosch Gmbh Dispositif de filtrage pour dispositif d'aspiration
CN107012913A (zh) * 2017-04-11 2017-08-04 四川亚润科技有限公司 基于水利工程的防堵塞新型结构
CN107913026A (zh) * 2016-10-10 2018-04-17 德国福维克控股公司 具有过滤器元件的吸尘器
CN108568171A (zh) * 2018-05-07 2018-09-25 江苏绿地环保滤材有限公司 一种改进换气方式的可清洁过滤除尘系统
CN110567066A (zh) * 2019-09-20 2019-12-13 王绍梅 一种新型空气净化设备
CN110567096A (zh) * 2019-09-17 2019-12-13 四川苏净机电设备有限公司 一种空调滤网处理系统
CN110841409A (zh) * 2019-11-26 2020-02-28 深圳市德昌达自动化科技有限公司 一种多级式粉尘和烟气处理的节能环保设备
CN111616643A (zh) * 2019-02-27 2020-09-04 彭志军 一种吸尘器用超声波抖尘清洁滤尘布装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013203001A1 (de) * 2013-02-25 2014-08-28 Bayerische Motoren Werke Aktiengesellschaft Belüftungsanlage für ein Fahrzeug
US10159925B2 (en) 2016-01-12 2018-12-25 Aurabeat Holdings Limited Acoustic aided air filter and a method of air filtration thereof
DE102017214948A1 (de) * 2017-08-26 2019-02-28 Mahle International Gmbh Filteranordnung und Heizungs-, Belüftungs- oder Klimaanlage mit einer Filteranordnung

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0551951A1 (fr) * 1992-01-16 1993-07-21 Shell Internationale Researchmaatschappij B.V. Dispositif pour la filtration de particules solides d'un fluide
JPH05192278A (ja) * 1992-01-20 1993-08-03 Matsushita Electric Ind Co Ltd 電気掃除機
US5641343A (en) * 1996-01-25 1997-06-24 Hmi Industries, Inc. Room air cleaner
EP0878583A1 (fr) * 1996-04-15 1998-11-18 Tennant Company Balayeuse et filtre avec purification de filtre électromagnétique
WO2001041619A1 (fr) * 1999-12-08 2001-06-14 Smc Marketing Corporation Aspirateur sans sac ameliore
EP1147824A1 (fr) * 1998-11-11 2001-10-24 Consejo Superior De Investigaciones Cientificas Dispositif ultrasonore destine a ameliorer les procedes de separation solide-liquide de suspensions

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0551951A1 (fr) * 1992-01-16 1993-07-21 Shell Internationale Researchmaatschappij B.V. Dispositif pour la filtration de particules solides d'un fluide
JPH05192278A (ja) * 1992-01-20 1993-08-03 Matsushita Electric Ind Co Ltd 電気掃除機
US5641343A (en) * 1996-01-25 1997-06-24 Hmi Industries, Inc. Room air cleaner
EP0878583A1 (fr) * 1996-04-15 1998-11-18 Tennant Company Balayeuse et filtre avec purification de filtre électromagnétique
EP1147824A1 (fr) * 1998-11-11 2001-10-24 Consejo Superior De Investigaciones Cientificas Dispositif ultrasonore destine a ameliorer les procedes de separation solide-liquide de suspensions
WO2001041619A1 (fr) * 1999-12-08 2001-06-14 Smc Marketing Corporation Aspirateur sans sac ameliore

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 017, no. 622 (C - 1130) 17 November 1993 (1993-11-17) *

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104014205B (zh) * 2014-06-21 2015-12-30 郭明利 一种空气滤网振动自清洁方法
CN104014205A (zh) * 2014-06-21 2014-09-03 陕西华嘉机电设备有限公司 一种空气滤网振动自清洁方法及装置
WO2017045857A1 (fr) * 2015-09-17 2017-03-23 Robert Bosch Gmbh Dispositif de filtrage pour dispositif d'aspiration
CN105763104A (zh) * 2016-04-07 2016-07-13 苏州工业园区职业技术学院 一种用于磁悬浮电机的气动式隔尘装置
CN107913026B (zh) * 2016-10-10 2021-06-29 德国福维克控股公司 具有过滤器元件的吸尘器
CN107913026A (zh) * 2016-10-10 2018-04-17 德国福维克控股公司 具有过滤器元件的吸尘器
CN107012913A (zh) * 2017-04-11 2017-08-04 四川亚润科技有限公司 基于水利工程的防堵塞新型结构
CN108568171A (zh) * 2018-05-07 2018-09-25 江苏绿地环保滤材有限公司 一种改进换气方式的可清洁过滤除尘系统
CN111616643A (zh) * 2019-02-27 2020-09-04 彭志军 一种吸尘器用超声波抖尘清洁滤尘布装置
CN110567096A (zh) * 2019-09-17 2019-12-13 四川苏净机电设备有限公司 一种空调滤网处理系统
CN110567096B (zh) * 2019-09-17 2021-05-28 四川苏净机电设备有限公司 一种空调滤网处理系统
CN110567066A (zh) * 2019-09-20 2019-12-13 王绍梅 一种新型空气净化设备
CN110841409A (zh) * 2019-11-26 2020-02-28 深圳市德昌达自动化科技有限公司 一种多级式粉尘和烟气处理的节能环保设备
CN110841409B (zh) * 2019-11-26 2021-09-24 深圳市德昌达自动化科技有限公司 一种多级式粉尘和烟气处理的节能环保设备

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