EP1942784A1 - Dispositif concu pour mesurer l'etat de remplissage d'un recipient a poussiere dans un aspirateur - Google Patents

Dispositif concu pour mesurer l'etat de remplissage d'un recipient a poussiere dans un aspirateur

Info

Publication number
EP1942784A1
EP1942784A1 EP06793917A EP06793917A EP1942784A1 EP 1942784 A1 EP1942784 A1 EP 1942784A1 EP 06793917 A EP06793917 A EP 06793917A EP 06793917 A EP06793917 A EP 06793917A EP 1942784 A1 EP1942784 A1 EP 1942784A1
Authority
EP
European Patent Office
Prior art keywords
vacuum cleaner
thermistor
direction according
dust container
heating resistor
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.)
Granted
Application number
EP06793917A
Other languages
German (de)
English (en)
Other versions
EP1942784B1 (fr
Inventor
Armin Böck
Silvio Hamm
Rudolf Hermann
Dirk Heinze
Stefan Von Dosky
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete 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 Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP1942784A1 publication Critical patent/EP1942784A1/fr
Application granted granted Critical
Publication of EP1942784B1 publication Critical patent/EP1942784B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
    • A47L9/2889—Safety or protection devices or systems, e.g. for prevention of motor over-heating or for protection of the user
    • 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
    • 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
    • A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
    • A47L9/2805—Parameters or conditions being sensed
    • 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
    • A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
    • A47L9/2857—User input or output elements for control, e.g. buttons, switches or displays

Definitions

  • the invention relates to a device for measuring the level in the dust container of a vacuum cleaner according to the preamble of claim 1.
  • the level is usually represented by a differential pressure indicator.
  • the problem with such indicators is that they do not determine the real level of the dust container, but in particular react to blockages of the downstream filter systems. This means that often a full dust container is displayed, although it is empty and only clogged filters are responsible for this display.
  • Bagless vacuum cleaners often do without a differential pressure gauge. Instead, transparent dust containers are used, which often carry an optical mark for the maximum level.
  • the timely emptying of the dust container is often overlooked in such vacuum cleaners, since the level is not very easy to see and no means are provided, which indicate the user visually or acoustically clearly on the maximum level reached. If the timely emptying of the dust container is overlooked, this leads to blockage of filter systems, which then have to be laboriously cleaned. Also, this is associated with a performance penalty of the vacuum cleaner. In the worst case, however, overlooking the maximum level may also result in damage to the vacuum cleaner motor.
  • the dust together with the air trapped therein, forms a thermal insulation layer.
  • the temperature of the heating resistor can be determined by measuring its ohmic resistance. It can therefore be determined by measuring the ohmic resistance of the heating resistor, whether the dust container is filled already over the position at which the heating resistor is mounted with dust and the dust container must be emptied, or if the vacuum cleaner until the next due emptying can continue to operate.
  • ohmic resistance is not directly measurable, it has proven useful instead to measure the current flow through the heating resistor.
  • an evaluation circuit is provided, in which a threshold value for the current flow is fixed, which is equivalent to a maximum or minimum ohmic resistance of the heating resistor.
  • the change of the ohmic resistance of the heating resistor can also be determined by changing the voltage applied to the heating resistor.
  • a thermistor In order to determine the temperature change of the heating resistor well, a thermistor is used as a heating resistor. Thermistors have the property, even at relatively low temperature changes, to change their ohmic resistance to a considerable extent. As a thermistor, a so-called NTC resistor or thermistor resistor can be used. NTC thermistors have a negative resistance coefficient. This means that the ohmic resistance of the thermistor drops as the temperature of the NTC resistor increases.
  • PTC resistors or PTC resistors which have a positive temperature coefficient.
  • PTC thermistors the ohmic resistance increases as the temperature of the thermistor increases.
  • the evaluation circuit can be used to control a red LED, which either flashes or lights up constantly.
  • a red LED which either flashes or lights up constantly.
  • the evaluation circuit can also be used to control a red LED, which either flashes or lights up constantly.
  • a green Provide a light-emitting diode that indicates that the maximum level has not yet been reached.
  • an acoustic signal transmitter can also be used, which alerts the user to the filled dust container even if the latter does not keep eye contact with the vacuum cleaner.
  • the evaluation circuit upon reaching the maximum level of the dust container, the vacuum cleaner motor shuts off.
  • Fig. 1 shows the device according to the invention in a semi-filled
  • Fig. 2 shows the device of Fig. 1 in a filled dust container
  • Fig. 3 shows an embodiment of an electrical circuit.
  • An unillustrated bagless vacuum cleaner operates with a separator 2 according to the eddy current principle, which opens into the dust container 1.
  • a separator 2 On a side wall of the dust container 1 and designed as a thermistor 3 heating resistor is mounted at a height that marks the maximum level.
  • the suction 5 has reached a level in Fig. 1, which is still far below the maximum level.
  • the air located above the suction material 5 in the dust container 1 is offset by the separator 2 according to the arrows 4 in a rotational movement and thereby moves constantly past the thermistor 3. Due to this air movement, heat energy is dissipated by the thermistor 3 and thus cooled. Its ohmic resistance remains approximately the same.
  • the thermistor 3 When the suction groove 5 reaches a height as shown in FIG. 2, the thermistor 3 is completely embedded in dust. The according to the arrows 4 rotating air above the suction material 5 reaches the thermistor 3 is no longer. From dust and trapped in it Stagnant air forms an insulating layer around the thermistor 3, which practically prevents further dissipation of heat energy. The thermistor 3 heats up and changes its ohmic resistance accordingly.
  • This change in the ohmic resistance can be detected and displayed. This ensures that the timely emptying of the dust container 1 can no longer be overlooked.
  • FIG. 3 shows by way of example a circuit with which the function described above can be realized.
  • a zener diode 7 and a light emitting diode (LED) 6 are connected in series. Parallel to these two components, a PTC thermistor 3, so a PTC resistor is connected.
  • the function of the evaluation circuit is taken over by the Zener diode 7. In the state of the dust container shown in Fig. 1 is applied to the circuit to a voltage which is below the breakdown voltage of the Zener diode 7.
  • the PTC thermistor 3 can no longer dissipate the heat energy generated and heats up. Its ohmic resistance increases. Increasing the resistance also increases the voltage applied to the circuit. When the voltage increases to a value corresponding to the breakdown voltage of the Zener diode, a current flows through the LED 6 connected in series with the Zener diode 7 and it starts to shine.
  • an acoustic signal generator can also be used. However, this acoustic signal generator can also be connected in parallel with the LED 6. In this way, the user of the vacuum cleaner will not miss that the dust container has now reached its maximum level and must be emptied.

Landscapes

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

Abstract

La présente invention concerne un dispositif conçu pour mesurer l'état de remplissage d'un récipient à poussière (1) dans un aspirateur. Selon cette invention, une résistance chauffante (3) est prévue dans le récipient à poussière. Cette résistance chauffante est placée de telle façon qu'elle n'est entourée d'impuretés (5) que lorsque le récipient à poussière est plein.
EP06793917.3A 2005-09-30 2006-09-29 Dispositif concu pour mesurer l'etat de remplissage d'un recipient a poussiere dans un aspirateur Not-in-force EP1942784B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200510047072 DE102005047072A1 (de) 2005-09-30 2005-09-30 Vorrichtung zur Messung des Füllstandes im Staubbehälter eines Staubsaugers
PCT/EP2006/066897 WO2007036567A1 (fr) 2005-09-30 2006-09-29 Dispositif concu pour mesurer l'etat de remplissage d'un recipient a poussiere dans un aspirateur

Publications (2)

Publication Number Publication Date
EP1942784A1 true EP1942784A1 (fr) 2008-07-16
EP1942784B1 EP1942784B1 (fr) 2015-03-11

Family

ID=37508325

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06793917.3A Not-in-force EP1942784B1 (fr) 2005-09-30 2006-09-29 Dispositif concu pour mesurer l'etat de remplissage d'un recipient a poussiere dans un aspirateur

Country Status (3)

Country Link
EP (1) EP1942784B1 (fr)
DE (1) DE102005047072A1 (fr)
WO (1) WO2007036567A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2726467A1 (de) * 1977-06-11 1978-12-21 Mauz & Pfeiffer Progress Einrichtung zum messen und anzeigen des verschmutzungsgrades eines in einem staubsauger eingebauten staubfilters
DE3718096A1 (de) * 1987-05-29 1988-12-08 Wolf Geraete Gmbh Rasenmaeher mit grasfangbehaelter
US7303613B2 (en) * 2003-12-11 2007-12-04 Euro-Pro Operating, Llc Filter sensor and indicator for vacuum cleaners

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007036567A1 *

Also Published As

Publication number Publication date
DE102005047072A1 (de) 2007-04-12
WO2007036567A1 (fr) 2007-04-05
EP1942784B1 (fr) 2015-03-11

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