EP0456084A1 - Flüssigkeitssauger - Google Patents

Flüssigkeitssauger Download PDF

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Publication number
EP0456084A1
EP0456084A1 EP91106974A EP91106974A EP0456084A1 EP 0456084 A1 EP0456084 A1 EP 0456084A1 EP 91106974 A EP91106974 A EP 91106974A EP 91106974 A EP91106974 A EP 91106974A EP 0456084 A1 EP0456084 A1 EP 0456084A1
Authority
EP
European Patent Office
Prior art keywords
liquid
rod
light barrier
receiving container
suction
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.)
Withdrawn
Application number
EP91106974A
Other languages
German (de)
English (en)
French (fr)
Inventor
Peter Wörwag
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.)
Fedag
Original Assignee
Fedag
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 Fedag filed Critical Fedag
Publication of EP0456084A1 publication Critical patent/EP0456084A1/de
Withdrawn legal-status Critical Current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
    • A47L9/28—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
    • 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
    • A47L7/00—Suction cleaners adapted for additional purposes; Tables with suction openings for cleaning purposes; Containers for cleaning articles by suction; Suction cleaners adapted to cleaning of brushes; Suction cleaners adapted to taking-up liquids
    • A47L7/0004—Suction cleaners adapted to take up liquids, e.g. wet or dry vacuum cleaners
    • A47L7/0023—Recovery tanks
    • A47L7/0028—Security means, e.g. float valves or level switches for preventing overflow
    • 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
    • A47L7/00—Suction cleaners adapted for additional purposes; Tables with suction openings for cleaning purposes; Containers for cleaning articles by suction; Suction cleaners adapted to cleaning of brushes; Suction cleaners adapted to taking-up liquids
    • A47L7/0004—Suction cleaners adapted to take up liquids, e.g. wet or dry vacuum cleaners
    • A47L7/0023—Recovery tanks
    • A47L7/0038—Recovery tanks with means for emptying the tanks
    • 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
    • A47L7/00—Suction cleaners adapted for additional purposes; Tables with suction openings for cleaning purposes; Containers for cleaning articles by suction; Suction cleaners adapted to cleaning of brushes; Suction cleaners adapted to taking-up liquids
    • A47L7/0004—Suction cleaners adapted to take up liquids, e.g. wet or dry vacuum cleaners
    • A47L7/0042—Gaskets; Sealing means
    • 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

Definitions

  • the invention relates to a liquid suction device according to the preamble of claim 1.
  • Liquid suction devices are used to hold washing liquids that have been applied to dirty floor surfaces for cleaning.
  • the liquid is sucked up by means of a suction air flow via a suction line with a suction tool attached to it and collected in the receptacle.
  • the interior of the receptacle is in direct flow connection with the motor suction fan.
  • the liquid level of the dirty liquid collected in the receptacle must be monitored and limited to a maximum permissible filling level.
  • a float valve arranged inside the liquid holding container is provided in the flow path to the suction fan. With increasing filling level, the valve body is moved against the suction opening of the suction fan, to finally close it when a maximum fill level is reached. Due to the absence of suction on the suction tool and the increase in speed of the motor suction fan associated with a change in noise, the personnel working with the suction device are advised of the need to empty the liquid holding container.
  • the electrical conductivity of the sucked-up dirty water between two insulated sensors is evaluated to determine the fill level.
  • the flowing electrical measuring current is fed to a signal processing system and evaluated in connection with a display to switch off the motor suction fan.
  • the known wet vacuum cleaners have the disadvantage that the liquid level in the receptacle, which is exposed to the suction air flow, is excited to cause a strong wave movement. Furthermore, a strong foaming of the dirty water interspersed with detergent must often be found. Both effects lead to a very unsatisfactory level detection due to the sloshing movements. The wet vacuum frequently switches off for an emptying of the liquid container which is not yet necessary, which results in unnecessary interruptions in work.
  • the invention has for its object to develop a wet vacuum cleaner according to the preamble of claim 1 such that an accurate fill level detection of the dirty water in the receptacle is achieved with high security against suction of foam or liquid in the motor suction fan.
  • Fill level detection can be carried out in a simple manner by means of the light barrier directed at the liquid level. It is advantageously provided that a reflection light barrier is arranged as a light barrier, to which a reflector is assigned at the level of the maximum fill level in the receptacle. This reflector is attached to the inner wall of the receptacle and is washed over by the dirty water when the liquid level rises above the maximum fill level. The reflection property of the reflector is reduced, as a result of which the light beam emitted by the transmitter of the light barrier is not or only very slightly reflected. The receiver registers the strong reduction in intensity or the absence of the reflected light beam and emits a corresponding output signal, which is advantageously evaluated for triggering an empty indicator and for switching off the motor suction fan.
  • the light barrier is optically coupled to one end of a light-conducting rod, the other end of which acts as a retro reflector and projects axially into the receptacle up to the level of the maximum fill level.
  • the emitted light beam is reflected on the preferably hemispherical head of the free rod end to the receiver and evaluated accordingly. If the dirty water floods the free end of the rod, its reflective properties change and the light beam emitted by the transmitter is not or only partially reflected to the receiver. The correspondingly changed output signal of the receiver is evaluated to control a display and to stop the motor suction fan.
  • the liquid suction device 1 shown in FIG. 1 essentially consists of a liquid receiving container 2 which is arranged on a chassis 3.
  • the cup-shaped receptacle 2 is closed airtight by a cover part 4, in which a motor suction fan (not shown in detail) and electrical switching devices and a display 6 are integrated.
  • the cover part 4 has a suction nozzle 5 which is connected in terms of flow via a suction line, not shown, to a suction tool, also not shown.
  • a light barrier 8 is arranged on the inside of the cover part 4 facing the interior of the receptacle.
  • the light barrier 8 is a reflection light barrier.
  • the emitted light beam 15 is reflected on a reflector 10 and falls as a reflected light beam 16 onto the receiver of the light barrier 8, which is arranged near the transmitter, preferably integrated with it in a common protective housing.
  • the motor suction fan In operation of the liquid suction device 1, the motor suction fan generates a suction air flow that runs from the suction cleaning tool via the suction line, the suction nozzle 5, the interior of the liquid holding container 2 to the motor suction fan. Sucked-up liquid is separated in the liquid holding container 2, the liquid level increasing accordingly during operation.
  • the light beam 15 emitted by the transmitter 17 (FIG. 3) of the light barrier 8 is reflected by the reflector 10 and falls as reflected light beam 16 on the receiver 18 (Fig. 3).
  • the signal generated in the receiver is processed in an electronic evaluation circuit, which enables the motor suction fan to operate.
  • the receiver will switch a switch (transistor or the like) to a first operating state in which the motor suction fan is activated and the display 6 has gone out. If the reflected light beam 16 strikes the receiver with reduced intensity, the receiver will change the switching state when the value falls below a limit value, as a result of which the motor suction fan is blocked and the display 6 is activated. Therefore, when the liquid collected in the receptacle reaches the maximum filling level, the reflector 10 is washed over by the dirty liquid. This changes the reflection property, so that the incident light beam 15 is weakened or not reflected at all. The missing light beam 16 or the light beam 16 reflected with reduced intensity causes a signal change in the receiver. This signal change is processed in the electronic evaluation circuit and leads to the motor suction fan being switched off and the display 6 being activated, which indicates the necessary emptying of the liquid receptacle.
  • a switch transistor or the like
  • a circumferential annular bead 11 can be provided as the reflector 10 on the inner wall 9 of the liquid receptacle, which is preferably made in one piece with the receptacle 2.
  • the annular bead 11 has an approximately horizontal surface 12 facing the opening of the receptacle 2, which is designed as a retro reflection surface for the emitted light beam 15 of the light barrier 8.
  • the over the inner circumference of the receptacle 2 extending reflection surface has the advantage that a certain rotational position of the cover part 4 with respect to the vertical axis is not necessary. In each rotational position of the cover part 4, the light barrier 8 faces a reflection surface.
  • the light barrier 8 is arranged in a common housing.
  • the transmitter 17 and the receiver 18 are each spatially separated from one another by a cover sleeve 19, 22.
  • a cover sleeve 19, 22 In the bottom of the housing 20 - preferably surrounding the receiver or the transmitter - flow openings 23 are provided, through which a small blowing air stream flows in from the ambient air via supply air openings in the cover part, so that foam flakes and dirt particles are blown away, which increases the functional reliability. Since there is 2 negative pressure in the interior of the collecting container, the blown air flow is easily achieved without further technical measures.
  • a plurality of reflectors 10, 10a, 10b are preferably provided in the receptacle 2 at different heights, with each reflector 10, 10a, 10b being assigned its own light barrier 8, 8a, 8b.
  • Each of the reflection light barriers 8, 8a, 8b is connected to the electronic evaluation circuit Displays 6, 6a, 6b connected and switched in such a way that different filling levels that occur during operation can be recognized in sequence by the displays 6, 6a, 6b. The operating personnel is thus informed in detail about the current fill level in the receptacle 2.
  • FIGS. 4 and 5 Another embodiment of the invention is shown in FIGS. 4 and 5.
  • a reflection rod 24 is fastened to the cover part 4 and projects axially into the interior of the liquid holding container 2.
  • the reflection rod 24 is preferably made of a transparent material such as glass or plastic.
  • the free end 26 of the rod 24 is approximately at the level of the maximum permissible liquid level.
  • a reflection light barrier 8 with its transmitter 17 and its receiver 18 is attached to the end 25 (FIG. 5) of the transparent rod 24 adjacent to the cover part 4 and is optically coupled to the transparent rod 24.
  • the light beam emitted by the transmitter 17 is reflected on the end face of the free rod end 26 and reflected back onto the receiver 18 as a reflected light beam.
  • the suction device is preferably put out of operation while the required emptying of the liquid receptacle 2 is displayed at the same time.
  • the refractive index in the transparent rod 24 at its interface with the air must be higher than the refractive index of the air, so that an almost total reflection occurs and the emitted light beam is completely reflected to the receiver 18. If the refractive index of the transparent rod material is approximately as large as that of the water flowing around the rod end, the critical angle reaches approximately 90 °. This means that the light beam to be reflected is lost and no light radiation hits the receiver.
  • the protective tube 30 prevents disruptive light reflections on the transparent rod 24.
  • the inner diameter of the protective tube is larger than the outer diameter of the transparent rod 24. This prevents the capillary action of the water and the foam from having any effects. Air flows in through the inflow openings 23 arranged in the housing 20 of the light barrier and keeps the annular gap between the rod 24 and the protective tube 30 and the rod 24 itself free of foam particles and dirt particles.
  • a protective basket 31 is also advantageously attached to the cover part 4, which receives the reflection rod and which protects the rod 24 from mechanical damage when the cover part 4 removed from the liquid holding container 2 is put down.
  • the protective cage 31 can be formed from an open wire mesh or another mesh with a plurality of openings in its wall.
  • FIG. 6 A further exemplary embodiment of the invention is shown in FIG. 6.
  • a guide rod 32 projecting axially into the liquid holding container 2 is fastened, on which a float 33 is mounted with its guide sleeve 36 in a slightly movable manner and rests against a stop plate 37 in its lowest position.
  • a reflection light barrier 8 is arranged in the cover part 4 such that the light beam emitted by the transmitter 17 strikes the surface of the float 33 facing the light barrier.
  • the surface is designed as a reflection surface and reflects the incoming light beam onto the receiver 18 of the light barrier 8.
  • the float 33 is axially upwards by the liquid against the cover part 4 and against the light barrier 8 emotional.
  • the float 33 remains floating in a horizontal position on the liquid surface even with sloshing movements of the inflowing liquid, so that the light beam running from the transmitter 17 to the receiver 18 of the light barrier 8 is reflected without interference.
  • This shortening of the transit time can be processed in a corresponding electronic evaluation circuit and evaluated to display and / or control the engine blower . Since the shortened distance is also expressed in an increase in the intensity of the reflected light beam, a limit value can be specified in a simple manner, when exceeded the evaluation circuit switches through, the display 6 is activated and the motor suction fan is switched off.
  • a restart of the motor suction fan switched off after the maximum fill level has been reached by the evaluation circuit is advantageously only possible after a so-called restart lock has been released.
  • the light radiation from the light barrier 8 is in the infrared range.
  • the output signal of the receiver of the light barrier is only evaluated when it is present for a certain period of time.
  • the period of time is chosen so that occasional spillover certainly precludes the evaluation circuit from responding.
  • a reflection light barrier is described as the light barrier 8.
  • a light barrier is particularly well suited because all electrical parts can be arranged on the removable cover part 4, so plug connections are not required.
  • the arrangement of a fork light barrier is advantageous, in which the transmitter is attached, for example, to the cover part 4 and the receiver, for example, to the inner wall of the receptacle 2. It is then only necessary, for example, to ensure an electrical connection of the receiver to the evaluation circuit in the cover part via a plug connection.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • External Artificial Organs (AREA)
  • Basic Packing Technique (AREA)
  • Filling Of Jars Or Cans And Processes For Cleaning And Sealing Jars (AREA)
  • Cleaning In General (AREA)
EP91106974A 1990-05-05 1991-04-30 Flüssigkeitssauger Withdrawn EP0456084A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4014443 1990-05-05
DE4014443A DE4014443A1 (de) 1990-05-05 1990-05-05 Fluessigkeitssauger

Publications (1)

Publication Number Publication Date
EP0456084A1 true EP0456084A1 (de) 1991-11-13

Family

ID=6405767

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91106974A Withdrawn EP0456084A1 (de) 1990-05-05 1991-04-30 Flüssigkeitssauger

Country Status (8)

Country Link
US (1) US5267370A (ja)
EP (1) EP0456084A1 (ja)
JP (1) JPH04230810A (ja)
KR (1) KR910019578A (ja)
CA (1) CA2041830A1 (ja)
DE (1) DE4014443A1 (ja)
FI (1) FI912154A (ja)
NO (1) NO911611L (ja)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0544992A1 (en) * 1991-12-03 1993-06-09 Suiden Co., Ltd. Vacuum cleaner
EP1833343A1 (en) * 2004-12-29 2007-09-19 Lawrence Orubor Self-cleaning wet dry vacuum cleaning device
WO2012000990A1 (en) * 2010-06-29 2012-01-05 Aktiebolaget Electrolux Dust detection system
US8776304B2 (en) 2007-04-04 2014-07-15 Lawrence Orubor Self-evacuating vacuum device
US9649000B2 (en) 2012-11-09 2017-05-16 Aktiebolaget Electrolux Cyclone dust separator arrangement, cyclone dust separator and cyclone vacuum cleaner

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5655258A (en) * 1996-03-12 1997-08-12 Heintz; J. Aaron Device for aspirating fluids from hospital operating room floor
US5918344A (en) 1996-07-12 1999-07-06 Shop Vac Corporation Self-evacuating vacuum cleaner
US5920955A (en) 1996-07-12 1999-07-13 Shop Vac Corporation Self-evacuating vacuum cleaner
US5966775A (en) 1996-07-12 1999-10-19 Shop Vac Corporation Self-evacuating vacuum cleaner
US6009596A (en) 1996-07-12 2000-01-04 Shop Vac Corporation Self-evacuating vacuum cleaner
US5850668A (en) 1996-07-12 1998-12-22 Shop Vac Corporation Self-evacuating vacuum cleaner
US6079076A (en) * 1997-07-31 2000-06-27 Shop-Vac Corporation Vacuum cleaner collection bag
US6112366A (en) 1999-01-20 2000-09-05 Shop Vac Corporation Outlet priming self-evacuation vacuum cleaner
US6521051B1 (en) * 2000-04-06 2003-02-18 U.S. Liquids, Inc. Portable vacuum storage unit and method for use
US6832407B2 (en) 2000-08-25 2004-12-21 The Hoover Company Moisture indicator for wet pick-up suction cleaner
DE10141544A1 (de) * 2001-08-24 2003-03-13 Eppendorf Ag Vorrichtung zur Behandlung von Flüssigkeiten und Verfahren zum Betreiben der Vorrichtung
DE10317111B4 (de) * 2003-04-14 2007-09-13 Alto Deutschland Gmbh Schmutzsauger mit Füllstandsmessung
DE20310723U1 (de) * 2003-07-12 2004-11-18 E.L.B.-Füllstandsgeräte Bundschuh GmbH + Co. Schutzeinrichtung für Tauchsonden
US8516650B2 (en) * 2007-10-11 2013-08-27 Black & Decker Inc. Vacuum electronic water sense circuit
JP5052633B2 (ja) * 2010-02-22 2012-10-17 中国電力株式会社 液位監視装置
JP5686149B2 (ja) * 2013-02-27 2015-03-18 三菱電機株式会社 塵埃量検知装置及びこれを用いた電気掃除機
DE102014017490A1 (de) * 2014-11-27 2016-06-02 Jenoptik Optical Systems Gmbh Vorrichtung und Verfahren zum Erfassen eines Inhaltes eines mit einer Flüssigkeit und/oder einem Granulat befüllbaren Behälters und/oder zur Erfassung der Größe eines befüllbaren Behälters, Befülleinrichtung zum Befüllen eines Behälters mit einer Flüssigkeit und/oder einem Granulat und Verwenden von Strahlung einer Reflexionslichtschranke zum Erfassen eines Füllstands einer Flüssigkeit und/oder eines Granulate in einem Behälter ....

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2197555A1 (ja) * 1972-09-06 1974-03-29 Philips Nv
DE2900433B1 (de) * 1979-01-08 1980-06-26 Vorwerk Co Interholding Optische Fuellstandsanzeige fuer den Staubbeutel eines Staubsaugers
DE3336210A1 (de) * 1982-10-06 1984-04-12 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München Verfahren und vorrichtung zur fuellstandsmessung
FR2538545A1 (fr) * 1982-12-27 1984-06-29 Air Liquide Dispositif de mesure du niveau d'un liquide dans un reservoir
DE3300824A1 (de) * 1983-01-12 1984-07-12 Hans Dr. 8000 München Hofmann-Reinecke Verfahren und vorrichtung zur messung der hoehe einer fluessigkeitssaeule
EP0327936A2 (de) * 1988-02-09 1989-08-16 Interlava AG Einbauvorrichtung für Sensoren und Geber
EP0347223A2 (en) * 1988-06-15 1989-12-20 Matsushita Electric Industrial Co., Ltd. Dust detector for vacuum cleaner

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3286444A (en) * 1964-12-30 1966-11-22 Whirlpool Co Vacuum cleaner
US4207649A (en) * 1976-03-09 1980-06-17 Bates Jack A Carpet cleaning machine
DE8018091U1 (de) * 1980-07-05 1980-10-16 Rowenta-Werke Gmbh, 6050 Offenbach Naß- und Trockensauger
DE3205831A1 (de) * 1982-02-18 1983-08-25 Karl-Heinz 8025 Unterhaching Schmiegel Vakuumfluessigkeitssauger
DE3247192A1 (de) * 1982-12-21 1984-07-05 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München Faseroptische fluessigkeitsstandsmessvorrichtung
DE3431175C2 (de) * 1984-02-08 1986-01-09 Gerhard 7262 Althengstett Kurz Schutzvorrichtung für Staubsammeleinrichtungen
DE3428453A1 (de) * 1984-08-01 1986-02-13 Siemens AG, 1000 Berlin und 8000 München Sensoreinrichtung
DE3436064C2 (de) * 1984-10-02 1986-08-07 Alfred Kärcher GmbH & Co, 7057 Winnenden Naß- und Trockensauger
DE3534621A1 (de) * 1985-09-28 1987-04-02 Interlava Ag Staubsauger
DE3629346A1 (de) * 1986-08-28 1988-03-10 Interlava Ag Vorrichtung zur bestimmung und anzeige des verstopfungsgrads von filtern
DE3630396A1 (de) * 1986-09-06 1988-03-17 Bbc Brown Boveri & Cie Anordnung zur fuellstandsmessung und -ueberwachung einer fluessigkeit in einem behaelter
US4732035A (en) * 1987-02-06 1988-03-22 Pandel Instruments, Inc. Method and apparatus for storage tank leak detection having temperature compensation
IT1219123B (it) * 1988-03-18 1990-05-03 Veglia Borletti Srl Metodo per il rilevamento del livello di un liquido in un serbatoio e sensore realizzante tale metodo
DE3821221A1 (de) * 1988-06-23 1988-11-10 Klaus Dipl Ing Becker Elektrisches geraet mit behaelter-ueberwachung

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2197555A1 (ja) * 1972-09-06 1974-03-29 Philips Nv
DE2900433B1 (de) * 1979-01-08 1980-06-26 Vorwerk Co Interholding Optische Fuellstandsanzeige fuer den Staubbeutel eines Staubsaugers
DE3336210A1 (de) * 1982-10-06 1984-04-12 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München Verfahren und vorrichtung zur fuellstandsmessung
FR2538545A1 (fr) * 1982-12-27 1984-06-29 Air Liquide Dispositif de mesure du niveau d'un liquide dans un reservoir
DE3300824A1 (de) * 1983-01-12 1984-07-12 Hans Dr. 8000 München Hofmann-Reinecke Verfahren und vorrichtung zur messung der hoehe einer fluessigkeitssaeule
EP0327936A2 (de) * 1988-02-09 1989-08-16 Interlava AG Einbauvorrichtung für Sensoren und Geber
EP0347223A2 (en) * 1988-06-15 1989-12-20 Matsushita Electric Industrial Co., Ltd. Dust detector for vacuum cleaner

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 14, no. 47 (C-682)(3990) 29. Januar 1990 & JP-A-1 277 528 (MATSUSHITA ELECTRIC IND CO LTD ) 8. November 1989 *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0544992A1 (en) * 1991-12-03 1993-06-09 Suiden Co., Ltd. Vacuum cleaner
EP1833343A1 (en) * 2004-12-29 2007-09-19 Lawrence Orubor Self-cleaning wet dry vacuum cleaning device
EP1833343A4 (en) * 2004-12-29 2008-08-27 Orubor Integrated Technology I SELF-CLEANING WET / DRY CLEANSING DEVICE
US7703170B2 (en) 2004-12-29 2010-04-27 Lawrence Orubor Self-cleaning wet dry vacuum cleaning device
US8776304B2 (en) 2007-04-04 2014-07-15 Lawrence Orubor Self-evacuating vacuum device
WO2012000990A1 (en) * 2010-06-29 2012-01-05 Aktiebolaget Electrolux Dust detection system
CN103037746A (zh) * 2010-06-29 2013-04-10 伊莱克斯公司 灰尘探测系统
US9015897B2 (en) 2010-06-29 2015-04-28 Aktiebolaget Electrolux Dust detection system
CN103037746B (zh) * 2010-06-29 2016-05-18 伊莱克斯公司 灰尘探测系统
US9649000B2 (en) 2012-11-09 2017-05-16 Aktiebolaget Electrolux Cyclone dust separator arrangement, cyclone dust separator and cyclone vacuum cleaner

Also Published As

Publication number Publication date
CA2041830A1 (en) 1991-11-06
DE4014443A1 (de) 1991-11-07
FI912154A (fi) 1991-11-06
US5267370A (en) 1993-12-07
FI912154A0 (fi) 1991-05-03
JPH04230810A (ja) 1992-08-19
NO911611L (no) 1991-11-06
KR910019578A (ko) 1991-12-19
NO911611D0 (no) 1991-04-23

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