EP0895744B1 - Detektionseinrichtung für Filtereinrichtungen in Staubsaugern - Google Patents

Detektionseinrichtung für Filtereinrichtungen in Staubsaugern Download PDF

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Publication number
EP0895744B1
EP0895744B1 EP98113631A EP98113631A EP0895744B1 EP 0895744 B1 EP0895744 B1 EP 0895744B1 EP 98113631 A EP98113631 A EP 98113631A EP 98113631 A EP98113631 A EP 98113631A EP 0895744 B1 EP0895744 B1 EP 0895744B1
Authority
EP
European Patent Office
Prior art keywords
filter
sensitive element
detector device
vacuum cleaner
sensor device
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.)
Expired - Lifetime
Application number
EP98113631A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0895744A1 (de
Inventor
Thomas Buscher
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.)
Branofilter GmbH
Original Assignee
Branofilter 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 Branofilter GmbH filed Critical Branofilter GmbH
Publication of EP0895744A1 publication Critical patent/EP0895744A1/de
Application granted granted Critical
Publication of EP0895744B1 publication Critical patent/EP0895744B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • A47L9/12—Dry filters
    • A47L9/122—Dry filters flat
    • 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
    • A47L9/14—Bags or the like; Rigid filtering receptacles; Attachment of, or closures for, bags or receptacles
    • A47L9/1427—Means for mounting or attaching bags or filtering receptacles in suction cleaners; Adapters
    • A47L9/1436—Connecting plates, e.g. collars, end closures
    • 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
    • A47L9/14—Bags or the like; Rigid filtering receptacles; Attachment of, or closures for, bags or receptacles
    • A47L9/1427—Means for mounting or attaching bags or filtering receptacles in suction cleaners; Adapters
    • A47L9/1472—Means for mounting or attaching bags or filtering receptacles in suction cleaners; Adapters combined with security means, e.g. for preventing use, e.g. in case of absence of the bag
    • 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
    • A47L9/2836—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means characterised by the parts which are controlled
    • A47L9/2842—Suction motors or blowers
    • 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
    • A47L9/2894—Details related to signal transmission in suction cleaners

Definitions

  • the invention relates to a detection device for filter devices in vacuum cleaners, in the next to a filter bag at least one additional filter can be used, with a feel the filter device inserted in the vacuum cleaner Sensor device and with those controlled by the sensor device Switching means for preventing the vacuum cleaner motor from being switched on if the filter device is not correctly recognized.
  • DE 26 03 110, DE 34 34 209 and US 2 839 156 Furthermore, a detection device is known in which the connector of the filter bag used in the vacuum cleaner actuated a switch, so that the presence of the vacuum cleaner bag is recognized. Only when activated The vacuum cleaner motor can be switched on.
  • DE 26 55 547, GB 1 440 174 and US 4 184 225 known pneumatic arrangements, in which the pneumatic Presence of the vacuum cleaner bag is detected, and in those also only switch on when the vacuum cleaner bag is recognized of the vacuum cleaner motor is possible.
  • the known detection devices make it possible switching on the motor when the filter bag is not inserted to prevent, however, there is a risk that a wrong one Additional filter is used, which also leads to malfunctions can lead.
  • the at least a sensitive element in the least or an additional filter electronic sensing by electromagnetic waves Sensor device on the basis of the sensor signals correct position and execution of the at least one sensitive Elements testing evaluation device with the switching means is connected, and that at least the sensor device and the evaluation device as a structural unit on at least one Printed circuit board arranged and / or as an integrated circuit are trained.
  • the detection device enables switching on of the vacuum cleaner if the additional filter is incorrect can be prevented even if the incorrect one is used
  • Auxiliary filter has a shape that that of the correct auxiliary filter equivalent. Becomes a poor quality or regarding the filter properties of unsuitable additional filters are used, who happens to have the same geometric design, for example, this can be an additional filter designed as a microfilter if the filtering is too coarse, the promised properties the vacuum cleaner does not meet, leading to complaints and complaints can lead. Also too little dust passage an incorrect, too tight additional filter can lead to impairments the vacuum cleaner function or even damage the vacuum cleaner motor to lead.
  • the detection device By the detection device according to the invention the correct additional filter can be reliably recognized, so that the optimal vacuum cleaner function is maintained and Disadvantages due to coarse-pored or too fine-pored additional filters can be prevented.
  • this detection device of course, also an incorrectly inserted one correct additional filter or a missing additional filter detected become.
  • the product liability of the invention proves Detection device as very advantageous. Farther the detection device according to the invention can be implemented, without structural changes compared to conventional ones Vacuum cleaners or vacuum cleaner housings would be required.
  • the sensor device can, of course, advantageously also in addition to sensing a sensitive element in or on the filter bag or the plate-like connector and to check the correct position and execution of the same be trained. This will protect the vacuum cleaner and the guarantee of a safe function still improved.
  • the assembly can be easily and inexpensively or on a wall of the vacuum cleaner housing in the area of at least one sensitive element can be arranged, wherein preferably the wall provided with the structural unit Vacuum cleaner housing essentially immediately next to the at least a sensitive element is arranged.
  • the sensor device has for generating the electromagnetic waves advantageously at least one, in particular a transmitter having an oscillating circuit, the sensor signals from the repercussions of the sensitive element formed the transmitter and / or the electromagnetic waves become.
  • the sensor device reacts very much sensitive to the shape and design of the sensitive element, so that the additional filter having this sensitive element or the so equipped connector of the respective Filter bag can be reliably recognized.
  • this is sensitive Element designed as a metallic surface element, in particular as a metal plate or foil or layer, and
  • the sensor signals are dependent on the eddy current effect caused attenuation of the transmitter.
  • the Attaching such a metallic surface element to or in the additional filter and possibly also connector can be very inexpensive can be realized, in particular variations the respective surface and shape in simpler Way are possible.
  • the sensitive element in the evaluation device is used for evaluation expediently a certain amplitude of the vibration assigned to the resonant circuit, for detection in the Evaluation device is provided a threshold level a derived from the amplitude of the oscillation of the resonant circuit Signal is supplied, being above an adjustable first threshold value the switching on of the vacuum cleaner motor Is blocked. From a certain area of the sensitive element, So from a certain damping onwards, the switch-on lock becomes canceled.
  • An even more reliable detection of the correct additional filter or Filter bag is achieved in that additionally below switching on a second adjustable lower threshold value of the vacuum cleaner motor is locked. This will For example, prevents an additional filter, which may be with a metal foil is covered or metallic components contains is recognized as correct.
  • the sensitive Element means for sending back to the received electromagnetic waves changed signals
  • the Sensor device has a corresponding receiving device. This makes detection even more reliable reached.
  • the frequency of the changed signals can be changed and / or phase position can be changed or they can be Signal code included.
  • Detection means for those who have changed in a certain way returned signals included.
  • Such a sensitive element that increased requirements the technology provides is expedient as a microchip trained that easily for example between different Layers of the additional filter or connector are arranged can be mass-produced relatively inexpensively is.
  • the transmitter can also as a light transmitter and the sensitive element as the light leading back to a light receiver in the sensor device Element be formed.
  • Suitable as a sensitive element a barcode or a. the light unchanged or changed to a specific location in the sensor device return deflecting element.
  • a capacitive can also be used as a further advantageous embodiment Detection of the sensitive element can be provided.
  • a very Reliable detection of the correct additional filter or connector to reach or filter bags are several sensitive Elements on or in the at least one additional filter and preferably also additionally on or in the connector and / or filter bags and are arranged by a corresponding Number of sensor sub-devices of the sensor device abfühlbar.
  • the at least one additional filter is preferably a microfilter and / or a filter cassette and / or an activated carbon filter and / or a combination filter as a combination of the above called filter. Only an additional filter can be used in the vacuum cleaner or several different additional filters are also provided his.
  • the additional filter 1 shown schematically in FIG. 1 is, for example a microfilter and consists of a platelet-shaped Filter body made of a plastic fleece, plastic fabric or another filter material. Suitable as plastics for example polypropylene or polyester.
  • a grid-like opening 3 is provided is covered by the additional filter 1.
  • the wall 2 a recess corresponding to the shape of the additional filter 1 in which the additional filter 1 is held by tabs 4.
  • the flexible additional filter 1 can be inserted into these tabs 4 become.
  • the air sucked in by the vacuum cleaner first arrives in itself in a known manner in a filter bag 10, as for example is shown in Figure 2.
  • the coarse dust and remains there the cleaned air passes through suitable, not shown Flow channels out of the vacuum cleaner housing outward.
  • it passes through the microfilter Additional filter 11, through the fine impurities, such as Spores, germs, pollen and the like are retained to no allergies when blowing the air out of the vacuum cleaner or cause other impairments.
  • a metal foil is on an edge region of the additional filter 1 attached as a sensitive element 5. Instead of a metal foil a metal plate or metallization can also occur.
  • a metal plate or metallization can also occur on the opposite side of the additional filter 1 Wall 2 .
  • a printed circuit board in the area of sensitive element 5 6 arranged on which an electronic circuit for Detection of the sensitive element 5 is arranged as in Figures 3 and 5 shown and described for example is.
  • the sensitive element 5 can be used in particular in the case of a multilayer Execution of the additional filter 1 also between the layers, So be arranged inside the additional filter 1 and so on the one hand protected and on the other hand not recognizable from the outside arranged.
  • a microfilter as an additional filter 1, for example an activated carbon filter or a filter cassette, which contains a pleated, lamellar filter material and is designed for example as an S-class filter. All of these filters can also be made in cardboard or plastic frames or housed in cardboard or plastic housings and for example be glued to them. It is also possible to use combination filters to use, i.e. for example a filter cassette with integrated activated carbon filter or a combined one Microfilter with activated carbon filter. The sensitive element can then either on the filter material itself or on the frame or Housing be attached. It is also possible to have several such Arrange additional filters one after the other.
  • the filter bag shown schematically in Figure 2 consists from the actual filter bag 10, the wall of one allowing air to pass through while retaining the dust in the bag Material is made, as well as from a connector 11, which on a location of the inlet opening actual filter bag 10 expediently by gluing is attached.
  • a wall 12 of the Vacuum cleaner for which the filter bag is intended is an in the receiving space of the vacuum cleaner receiving the filter bag projecting connection piece 13 is present, on which the connector 11 when inserting the filter bag into the vacuum cleaner is plugged in so that the connecting piece 13 one on the connector 11 formed plug opening 14 passes through and in the inside of the filter bag protrudes. In this way, the Vacuum cleaner sucked air get into the filter bag which then leaves the dust filtered out on the filter bag wall.
  • the connector 11 is substantially plate-shaped and consists of cardboard-like rigid material.
  • a usually Existing slide gate and a push-on opening 14 usually surrounding membrane seal are for Simplification not shown and with conventional filter bags also not available in every case. Is a slide gate provided, the connector 11 usually consists of several cardboard layers, such as this in DE 43 39 298 is shown and described.
  • a receiving groove for an edge region of the connector 11 provided retaining bar 15, which is also by two appropriately trained holding elements can be replaced.
  • a locking projection 16 extends through the opposite side a locking opening 17 when plugging the connector 11 through and locks the connector 11. This can for example also two locking projections 16 and two locking openings 17 may be provided.
  • the type of attachment for the present invention is irrelevant and can for example according to the state of the art already stated or according to DE 43 39 297 may be formed.
  • a metal foil attached as a sensitive element 18 At the regarding the connector 11 opposite side of the wall 12 is corresponding 1 in the area of the sensitive element 18 Printed circuit board 19 arranged on the electronic circuit is arranged to detect the sensitive element 18. For this purpose, we also refer to the corresponding statements Figure 1 referenced.
  • FIG. 3 is an electromagnetic wave generating Oscillating circuit arrangement 20 via a rectification arrangement 21 connected to a comparator assembly 22 via which a triac 23 is controllable in the circuit of a vacuum cleaner motor 24.
  • the mode of operation is such that the resonant circuit of the resonant circuit arrangement 20 excited by an excitation switch (not shown) emits electromagnetic waves to the outside.
  • the AC voltage signals generated due to the vibrations in the electronic circuit are rectified in the rectification arrangement 21, so that a signal is present at the output thereof which is dependent on the amplitude of the vibrations.
  • the comparator arrangement 20 containing two comparators it is checked whether this signal is smaller than its first threshold value S 1 and at the same time larger than a second, lower threshold value S 2 . Only if these two conditions are met, the triac 23 is switched to conduct current, so that the vacuum cleaner motor 24 can be switched on by means of a manual switch (not shown).
  • the first threshold value S 1 is set such that the output signal of the rectification arrangement 21 is higher when the resonant circuit arrangement 20 is not damped, so that the triac 23 is blocked.
  • the sensitive element 5 or 18 reaches the effective range of the resonant circuit arrangement 20 and is induced by voltage in the sensitive element 5 or 18 Eddy currents are generated which draw energy from the resonant circuit and dampen it.
  • the oscillation amplitude thereby decreases, so that the output signal of the rectification arrangement 21 also decreases.
  • the two threshold values S 1 and S 2 are set so that the damping of the resonant circuit arrangement 20 generated by the sensitive element 5 or 18 in the correctly mounted state of the additional filter 1 or connecting piece 11 is just sufficient to reduce the output signal of the rectification arrangement 21 below the upper one To press threshold S 1 , but not below the lower threshold S 2 so that the intended condition is met and the triac 23 is switched to the current-carrying state, so that the vacuum cleaner motor 24 can be switched on or operated.
  • the threshold value S 1 would not be fallen below and the vacuum cleaner could not be operated.
  • the comparator arrangement could 22 also have only one comparator, so that only checked is whether a sensitive element 5 or 18 with a certain Minimum size in or on the additional filter 1 or connector 11 is included.
  • a triac 23 a other known electrical or electronic switches to step.
  • the connector 11 is a schematic Shown top view.
  • four different sensitive elements 25 - 28 arranged: three sensitive Elements 25 - 27 in a rectangular shape with different Areas and a sensitive element 28 in the form of a double stripe.
  • these sensitive elements 25-28 Arrangement - with correctly inserted connector 11 - opposite are four resonant circuit arrangements on the circuit board 19 arranged the respective sensitive elements Scan or test 25 - 28.
  • Each of the The resonant circuit arrangements 29-33 are thereby determined in a certain way Damped way, the resonant circuit arrangement 33 no damping experiences. This is shown in comparator arrangements, not shown checked, and only if the intended damping value everywhere is detected, the triac 23 is turned on.
  • the number and arrangement of the sensitive elements and resonant circuit arrangements can of course be chosen practically arbitrarily become.
  • FIG. 4 An arrangement corresponding to FIG. 4 can of course be used also on one or, if available, on several additional filters 1 may be arranged, for example on a frame or housing an additional filter. The mode of action is then corresponding the description of FIG. 4.
  • Circuit for checking a correct additional filter or filter bag or connector there is a sensor device from a transmitter 34 and a receiver 35 for electromagnetic Waves.
  • One to be attached to the additional filter 1, for example sensitive element 36 is designed as a microchip and also consists of a receiver 37 and a transmitter 38 for electromagnetic waves.
  • Power supply device 39 for the receiver 37 and the Transmitter 38 is provided, which is designed either as a battery or which are connected to the resonant circuit of the receiver 37 and the supply voltage from the RF energy received in the resonant circuit wins, as for example from DE 41 10 683 is known.
  • a converter is contained in the receiver 37 or in the transmitter 38, by which the received signal is changed. This changed The signal is then transmitted by the transmitter 38 of the sensitive element 36 back to the receiver 35 of the sensor device.
  • the conversion can be done, for example, by that the frequency or phase of the RF signal is changed.
  • the retransmitted can Signal can be modulated in a certain way, so that a certain code sent to the receiver 35 of the sensor device becomes.
  • the signal received in the receiver 35 is then in one Decoder 40 then checks whether the intended information of the sensitive element 36 is included. Is this the If so, the decoder 40 switches the triac 23 in a current-conducting manner. Further possibilities of signal coding and retransmission by sensitive elements 36 designed as microchips known from DE 41 10 683 already mentioned.
  • the transmitter for electromagnetic waves as the light transmitter and the receiver trained as a light receiver for electromagnetic waves is.
  • a barcode or another can then be used as a sensitive element Appear device that changes the light in or unchanged Way to the light receiver of the sensor device feeds back.
  • a light guide can be provided, which on a Place light received by the sensor device at another Leads back to the additional filter or connector, on which the light receiver is arranged.
  • the sensitive element in turn as a current-conducting plate or metallic surface element may be formed, the one Forms part of a capacitor of a resonant circuit.
  • the sensor devices and evaluation devices can be integrated or non-integrated Circuits on the circuit board 6 and 19 may be included. there it is also possible, for example, the entire circuit fully or partially designed as an integrated circuit or there can be several sensitive elements at different Make multiple circuit boards or other sensor devices be provided.
  • a sensitive element or several sensitive elements arranged on the actual filter bag 10 be who usually clings to the walls during operation creates a filter bag space in the vacuum cleaner.
  • the circuit board 19 and / or an integrated Sensor and evaluation circuit can be arranged. They are too Combined versions possible, some of which are sensitive Elements on the actual filter bag 10 and some on the connector 11 are arranged. Of course, this applies also for additional filters.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electric Vacuum Cleaner (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Filtration Of Liquid (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)
EP98113631A 1997-08-07 1998-07-22 Detektionseinrichtung für Filtereinrichtungen in Staubsaugern Expired - Lifetime EP0895744B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19734193A DE19734193A1 (de) 1997-08-07 1997-08-07 Detektionseinrichtung für Filtereinrichtungen in Staubsaugern
DE19734193 1997-08-07

Publications (2)

Publication Number Publication Date
EP0895744A1 EP0895744A1 (de) 1999-02-10
EP0895744B1 true EP0895744B1 (de) 2003-08-27

Family

ID=7838258

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98113631A Expired - Lifetime EP0895744B1 (de) 1997-08-07 1998-07-22 Detektionseinrichtung für Filtereinrichtungen in Staubsaugern

Country Status (7)

Country Link
US (1) US6073302A (da)
EP (1) EP0895744B1 (da)
AT (1) ATE247923T1 (da)
CA (1) CA2244544A1 (da)
DE (2) DE19734193A1 (da)
DK (1) DK0895744T3 (da)
ES (1) ES2205339T3 (da)

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US9386877B2 (en) 2007-05-18 2016-07-12 Kraft Foods R & D, Inc. Beverage preparation machines and beverage cartridges
US10660497B2 (en) 2017-06-12 2020-05-26 Emerson Electric Co. Upright vacuum cleaner having switch to detect a filter assembly

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9386877B2 (en) 2007-05-18 2016-07-12 Kraft Foods R & D, Inc. Beverage preparation machines and beverage cartridges
US10952562B2 (en) 2007-05-18 2021-03-23 Koninklijke Douwe Egberts B.V. Beverage preparation machines and beverage cartridges
US10660497B2 (en) 2017-06-12 2020-05-26 Emerson Electric Co. Upright vacuum cleaner having switch to detect a filter assembly
US11185202B2 (en) 2017-06-12 2021-11-30 Emerson Electric Co. Upright vacuum cleaner having microswitch and filter assembly

Also Published As

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ES2205339T3 (es) 2004-05-01
DE59809390D1 (de) 2003-10-02
DE19734193A1 (de) 1999-02-11
CA2244544A1 (en) 1999-02-07
DK0895744T3 (da) 2003-12-22
US6073302A (en) 2000-06-13
ATE247923T1 (de) 2003-09-15
EP0895744A1 (de) 1999-02-10

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