WO2007033977A1 - Procede pour produire un signal de changement de sac filtrant et aspirateur equipe d'un ventilateur extracteur - Google Patents

Procede pour produire un signal de changement de sac filtrant et aspirateur equipe d'un ventilateur extracteur Download PDF

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Publication number
WO2007033977A1
WO2007033977A1 PCT/EP2006/066567 EP2006066567W WO2007033977A1 WO 2007033977 A1 WO2007033977 A1 WO 2007033977A1 EP 2006066567 W EP2006066567 W EP 2006066567W WO 2007033977 A1 WO2007033977 A1 WO 2007033977A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
filter bag
vacuum cleaner
sensor
suction fan
Prior art date
Application number
PCT/EP2006/066567
Other languages
German (de)
English (en)
Inventor
Martin Fieseler
Original Assignee
Vorwerk & Co. Interholding 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 Vorwerk & Co. Interholding Gmbh filed Critical Vorwerk & Co. Interholding Gmbh
Publication of WO2007033977A1 publication Critical patent/WO2007033977A1/fr

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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
    • A47L9/19—Means for monitoring filtering operation

Definitions

  • the invention firstly relates to a method for generating a signal for changing the filter bag in a vacuum cleaner having an electric motor with a suction fan.
  • a technical problem of the invention is seen in providing a method for generating a filter bag change signal, which is distinguished by a high accuracy of the filter bag fill level to be determined.
  • the structure-borne sound resulting from the rotation is see converted signals.
  • the suction fan generates a characteristic frequency spectrum, which shifts towards higher frequencies with increasing blockage of the filter bag. From the entire oscillation spectrum, a relatively narrow frequency range is filtered out. The RMS value of the energy falling within this spectral range is determined thereafter. When the filter bag is empty, only a small proportion of the vibration energy falls within the selected frequency range. With increasing blockage of the filter bag, the entire frequency spectrum of the suction fan or of the entire motor / fan unit shifts, with the oscillation energy falling within the selected frequency range increasing. If the detected vibration energy exceeds a predetermined value, an optical or acoustic signal is output, which requests the change of the filter bag.
  • a signal intensity curve increases with increasing frequency, passes through a maximum and then drops and the predetermined frequency spectrum is selected on the falling part of the curve. If, for example, the vacuum cleaner is operated at reduced power, the entire vibration spectrum shifts towards lower frequencies. Due to the arrangement of the predetermined frequency spectrum on the falling edge of the signal intensity curve, the inventive method is applicable regardless of the selected power level of the suction fan.
  • the electrical signal of the sensor is fed to an impedance converter.
  • the output of the impedance converter is the input of a bandpass filter.
  • an evaluation window is stored with regard to the frequency-resultant intensity of the electrical signal of the sensor.
  • the output of the bandpass filter is amplified and then rectified.
  • the output of the rectifier is fed to a comparator, which determines this output quantity.
  • This setpoint may be different depending on the selected power level of the suction fan.
  • the voltage of the setpoint generator for the fan speed can be used as setpoint value, with which the method functions independently of the set power of the suction fan.
  • the sensor is preferably a piezoelectric transducer, which converts the structure-borne noise resulting from the rotation of the suction fan into electrical signals.
  • the invention relates to a vacuum cleaner with a suction fan having an electric motor, a fan cover for the suction fan and a filter bag.
  • an electro-acoustic sensor is mounted on the fan cover for supplying an electrical output signal depending on the vibration of the fan cover. This output signal can be used, for example, to determine the actual fan speed.
  • the filter bag fill level is determined by means of the output signal.
  • an electrical output signal is generated, which in turn can optionally be evaluated to the optical or acoustic display.
  • the electro-acoustic sensor converts the structure-borne noise resulting from the rotation of the impeller into electrical signals, wherein the suction fan generates a characteristic frequency spectrum which, for example, shifts to higher frequencies as the degree of filling of the filter bag increases.
  • the output signal of the sensor is processed in an evaluation and an indication signal is generated, which relates to the level of the filter bag.
  • An electrical signal corresponding to the structure-borne noise of the suction fan is, if appropriate, evaluated as a full filter bag after a corresponding evaluation and visually and / or acoustically displayed.
  • the thus created dust bag level indicator is pressure, in particular differential pressure independent and also arranged by arranging the sensor on the fan cover, in particular on the outside of the fan cover in a non-contaminated area and thus wear-trained.
  • the transmitter has an impedance converter and / or a band filter and / or an amplifier and / or a rectifier and / or a comparator.
  • the comparator is given the output of the rectifier to compare this with a setpoint.
  • An evaluation window is stored in the bandpass filter with respect to the frequency-related intensity of the electrical signal of the sensor. A value determined in this evaluation window is evaluated as a full filter bag.
  • Figure 1 is a perspective view of a vacuum cleaner with a suction fan and a filter bag level indicator.
  • FIG. 2 is a perspective detail view of the suction fan with arranged on the fan cover of the suction fan sensor.
  • Fig. 3 is a diagram showing the different frequency spectra, with an empty and full filter bag;
  • Fig. 4 shows the schematic structure of the evaluation.
  • a vacuum cleaner 1 in the form of an electric, stalk guided hand vacuum cleaner, with a housing 2 and a flow connected to the vacuum cleaner 1 attachment 3.
  • a chamber 4 is apparently arranged, for receiving a filter bag, not shown.
  • the suction air flow to be applied for suction processing is generated by a suction fan 5 arranged in the housing 2 and having an electric motor.
  • the suction fan 5 carries, as can be seen in particular from the detailed representation in Fig. 2, a fan cover 6. At its outer shell wall, a sensor 7 is arranged in the form of a piezoelectric transducer. This is electrically connected to an evaluation 8, the output signal is supplied in the illustrated embodiment, arranged on the housing 2 of the vacuum cleaner 1 indicator 9.
  • the transmitter 8 initially has an impedance converter 10, for supplying the electrical signal of the sensor 7 to a downstream band filter 11. In the latter, a predetermined frequency spectrum in the manner of an evaluation window A is deposited. The output of the bandpass filter is supplied to a rectifier 13 via an amplifier 12. The subsequently rectified signal is finally fed to a comparator 14, which supplies this Signal compares with a set by a setpoint generator 15 setpoint. Depending on the value determined by the comparator 14, the display 9 is activated.
  • the activation of the light indicator 9 can serve as an indication to the user to the filter bag change.
  • the display 9 changes, for example, from a green signal into a red signal, possibly after passing through a color spectrum changing from green to red.
  • acoustic signals are also possible as a function of the determined value.
  • the structure-borne noise resulting from the rotation of the impeller of the suction fan 5 is converted into electrical signals.
  • the blower generates a characteristic frequency spectrum, which shifts towards higher frequencies with increasing blockage of the filter bag.
  • a relatively narrow frequency range (evaluation window A) is filtered out.
  • the effective value of the energy falling in this spectral range is determined. It can be seen from the illustration in FIG. 3 that with the filter bag empty, depending on the frequency F, only a small portion of the oscillation energy E falls within the selected frequency range A (see identification line I). With increasing blockage (identification line II) of the filter bag, the entire frequency spectrum of the suction fan 5 shifts. The oscillation energy E falling in the selected frequency range A increases. If the detected oscillation energy E now exceeds a predetermined value of the setpoint value generator 15, then the signal is output which requests the change of the filter bag.
  • the vacuum cleaner 1 If the vacuum cleaner 1 is operated at reduced power, the entire oscillation spectrum shifts towards lower frequencies. However, since the filter curve A of the bandpass is on the falling edge of the suction fan 5, the above-described principle can be applied unchanged regardless of the selected power level of the suction fan. It is only the threshold value for the comparator 14 is changed, including, for example, the voltage of the setpoint generator for the Sauggebläse speed can be used.

Landscapes

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

Abstract

La présente invention concerne un procédé pour produire un signal de changement de sac filtrant avec un aspirateur (1) qui présente un moteur électrique équipé d'un ventilateur extracteur (5). Selon cette invention, un signal électrique correspondant au bruit solidien émis par le ventilateur extracteur (5) est évalué au moyen d'un capteur (7) associé au couvercle (6) du ventilateur extracteur (5), puis un domaine (A) dans lequel le signal est jugé comme relatif à un sac filtrant plein est déterminé dans un spectre de fréquences prédéfini.
PCT/EP2006/066567 2005-09-23 2006-09-21 Procede pour produire un signal de changement de sac filtrant et aspirateur equipe d'un ventilateur extracteur WO2007033977A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005045544.1 2005-09-23
DE200510045544 DE102005045544A1 (de) 2005-09-23 2005-09-23 Verfahren zum Generieren eines Signals zum Filterbeutelwechsel sowie Staubsauger mit einem Sauggebläse

Publications (1)

Publication Number Publication Date
WO2007033977A1 true WO2007033977A1 (fr) 2007-03-29

Family

ID=37441796

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/066567 WO2007033977A1 (fr) 2005-09-23 2006-09-21 Procede pour produire un signal de changement de sac filtrant et aspirateur equipe d'un ventilateur extracteur

Country Status (2)

Country Link
DE (1) DE102005045544A1 (fr)
WO (1) WO2007033977A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD840615S1 (en) 2016-10-14 2019-02-12 Tti (Macao Commercial Offshore) Limited Handheld vacuum cleaner
USD844265S1 (en) 2016-10-14 2019-03-26 Tti (Macao Commercial Offshore) Limited Handheld vacuum cleaner
US10470625B2 (en) 2016-04-15 2019-11-12 Tti (Macao Commercial Offshore) Limited Vacuum cleaner and filter for a vacuum cleaner
USD911642S1 (en) 2017-12-05 2021-02-23 Techtronic Floor Care Technology Limited Housing for a filter
US11607637B2 (en) 2018-08-31 2023-03-21 Milwaukee Electric Tool Corporation Power tool including an air filter and debris collector

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008038893A1 (de) * 2008-08-13 2010-02-18 Miele & Cie. Kg Verfahren und Vorrichtung zur Bestimmung des Füllgrades eines in einem Staubsauger angeordneten Sammelorgans
DE102010062146B4 (de) * 2010-11-29 2013-04-11 BSH Bosch und Siemens Hausgeräte GmbH Vorrichtung zur Bestimmung eines Füllgrades eines Staubsammelbehälter für einen Staubsauger und Staubsauger
DE102015114668A1 (de) * 2015-09-02 2017-03-02 Alfred Kärcher Gmbh & Co. Kg Saugvorrichtung und Verfahren zum Betreiben einer Saugvorrichtung
EP3687359B1 (fr) 2017-09-28 2021-07-07 TTI (Macao Commercial Offshore) Limited Aspirateur

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3580092A (en) * 1969-12-23 1971-05-25 Scarpa Lab Inc Acoustic flowmeter
DE4026460A1 (de) * 1990-08-17 1991-03-21 Jan Leinemann Verfahren zur ueberwachung des durchflusses eines in einem strahl aus einer oeffnung austretenden fluids
DE4190521C1 (de) * 1990-03-12 1994-03-03 Edwin Bollier Auf Körperschall ansprechendes Mikrofon
JPH0739498A (ja) * 1993-07-29 1995-02-10 Matsushita Electric Ind Co Ltd 電気掃除機
US5608944A (en) * 1995-06-05 1997-03-11 The Hoover Company Vacuum cleaner with dirt detection
EP1302149A2 (fr) * 2001-10-15 2003-04-16 Lg Electronics Inc. Dispositif pour la protection du moteur d'un aspirateur
US20050183230A1 (en) * 2004-01-30 2005-08-25 Funai Electric Co., Ltd. Self-propelling cleaner

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3580092A (en) * 1969-12-23 1971-05-25 Scarpa Lab Inc Acoustic flowmeter
DE4190521C1 (de) * 1990-03-12 1994-03-03 Edwin Bollier Auf Körperschall ansprechendes Mikrofon
DE4026460A1 (de) * 1990-08-17 1991-03-21 Jan Leinemann Verfahren zur ueberwachung des durchflusses eines in einem strahl aus einer oeffnung austretenden fluids
JPH0739498A (ja) * 1993-07-29 1995-02-10 Matsushita Electric Ind Co Ltd 電気掃除機
US5608944A (en) * 1995-06-05 1997-03-11 The Hoover Company Vacuum cleaner with dirt detection
EP1302149A2 (fr) * 2001-10-15 2003-04-16 Lg Electronics Inc. Dispositif pour la protection du moteur d'un aspirateur
US20050183230A1 (en) * 2004-01-30 2005-08-25 Funai Electric Co., Ltd. Self-propelling cleaner

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10470625B2 (en) 2016-04-15 2019-11-12 Tti (Macao Commercial Offshore) Limited Vacuum cleaner and filter for a vacuum cleaner
US10531772B2 (en) 2016-04-15 2020-01-14 Tti (Macao Commercial Offshore) Limited Handheld vacuum cleaner
US10743731B2 (en) 2016-04-15 2020-08-18 Tti (Macao Commercial Offshore) Limited Vacuum filter
US11363922B2 (en) 2016-04-15 2022-06-21 Techtronic Floor Care Technology Limited Vacuum cleaner and filter for a vacuum cleaner
USD840615S1 (en) 2016-10-14 2019-02-12 Tti (Macao Commercial Offshore) Limited Handheld vacuum cleaner
USD844265S1 (en) 2016-10-14 2019-03-26 Tti (Macao Commercial Offshore) Limited Handheld vacuum cleaner
USD911642S1 (en) 2017-12-05 2021-02-23 Techtronic Floor Care Technology Limited Housing for a filter
US11607637B2 (en) 2018-08-31 2023-03-21 Milwaukee Electric Tool Corporation Power tool including an air filter and debris collector

Also Published As

Publication number Publication date
DE102005045544A1 (de) 2007-03-29

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