EP0468282B1 - Dust collector level indicating device - Google Patents

Dust collector level indicating device Download PDF

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Publication number
EP0468282B1
EP0468282B1 EP91111498A EP91111498A EP0468282B1 EP 0468282 B1 EP0468282 B1 EP 0468282B1 EP 91111498 A EP91111498 A EP 91111498A EP 91111498 A EP91111498 A EP 91111498A EP 0468282 B1 EP0468282 B1 EP 0468282B1
Authority
EP
European Patent Office
Prior art keywords
connecting piece
vacuum cleaner
indicating device
opening
housing
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
EP91111498A
Other languages
German (de)
French (fr)
Other versions
EP0468282A1 (en
Inventor
Herbert Kess
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.)
BOSCH-SIEMENS HAUSGERAETE GMBH
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP0468282A1 publication Critical patent/EP0468282A1/en
Application granted granted Critical
Publication of EP0468282B1 publication Critical patent/EP0468282B1/en
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
    • A47L9/19—Means for monitoring filtering operation

Definitions

  • a display device attached to a vacuum cleaner housing and showing the degree of filling of a filter bag inserted in the vacuum cleaner housing
  • the invention relates to a display device mounted on a vacuum cleaner housing according to the preamble of claim 1.
  • connection piece is inserted with its connection end directly into an opening in a wall delimiting the dust space of the vacuum cleaner.
  • This opening has a constant width over its full depth.
  • a bead is formed on the outer circumference of the connection end, with which the connection piece rests on the wall of the dust chamber.
  • a display device arranged on a vacuum cleaner in which a membrane piston is provided.
  • the diaphragm is subjected to atmospheric pressure on one side and the negative pressure prevailing in the vacuum cleaner housing on the other side.
  • the control device is connected to the vacuum chamber by means of a molded part on the housing of the control device Pipe approach and a line connected to this and connected to the interior of the vacuum cleaner. With this display device there is therefore no direct connection to the vacuum chamber of the vacuum cleaner.
  • the invention has for its object to develop a display device of the generic type so that a trouble-free connection of the display device to the vacuum chamber of a vacuum cleaner is possible.
  • a significant simplification of the assembly results from the fact that the inlet opening is surrounded by a sealing lip which is formed on the connecting piece and forms a ring, the thickness of which decreases towards its free end. In such a configuration, additional operations for the attachment of separate sealing elements are omitted.
  • a cover frame which can be fastened to the housing of the vacuum cleaner can advantageously be connected to the connecting piece.
  • the connection is expediently made via a film hinge, so that the parts are still movable relative to one another.
  • connection piece 1 with a connecting piece and 2 with a via a film hinge 3 connected to the connecting piece 1 cover frame.
  • the connector 1 has a receiving bore 4 for a chick 5, which is used to set the response characteristic of the display device. Furthermore, an inlet opening 6 and an outlet opening 7 are provided on the connection piece 1.
  • the inlet opening 6 is surrounded by a sealing lip 8 forming a ring.
  • the sealing lip 8 decreases in strength towards its free end 9. As a result, the necessary elasticity of the sealing lip 8 is achieved.
  • the outlet opening 7 is surrounded by a connecting piece 11 having a sealing bead 10 on its outer circumference.
  • the cover frame 2 When mounting the display device on a vacuum cleaner housing 12, the cover frame 2 is folded down by 180 ° towards the connector 1, as indicated by an arrow 13 in FIG. In Figure 2, the cover frame 2 is shown in its folded state.
  • the connector 1 is in the assembly of the display device on a vacuum cleaner housing with its sealing lip 8 in a connection opening formed as a bore 14 inserted, which is located in a wall 15 delimiting the vacuum chamber of the vacuum cleaner.
  • the bore 14 is tapered towards the vacuum chamber. This ensures that the sealing lip 8 bears tightly against the wall of the bore 14 regardless of any manufacturing tolerances.
  • a pipe part 16 which forms the piston space and is made of transparent material (glass or plastic), is plugged onto the connecting piece 11 with its one end 17.
  • the tubular part 16 is held by side wall parts 18 and by a stop 19 of the cover frame 2.
  • a piston 21 coupled to a return spring 20 is arranged displaceably in the tubular part 16.
  • the other end 22 of the tubular part 16 is connected via a connecting channel 23 formed between the cover frame 2 and the vacuum cleaner housing 12 to an opening 24 of the cover frame 2 leading to the atmosphere.
  • On the cover frame 2 there is also a cutout 25 which leaves the tubular part 16 free. Through this cutout 25, the piston 21 adjusted in the tube part 16 in proportion to the pressure difference existing between atmosphere and negative pressure can be observed.
  • the adjustment distance of the piston 21 is a measure of the degree of filling of the filter bag.
  • sealing elements sealing lip 8 or sealing bead 10
  • sealing lip 8 or sealing bead 10 a separate installation of such parts is unnecessary.
  • such elements achieve a practically trouble-free seal, since no displacements leading to leaks are possible, as is the case with separate parts.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Vacuum Packaging (AREA)
  • Packages (AREA)

Description

An einem Staubsaugergehäuse angebaute, den Füllgrad eines im Staubsaugergehäuse eingesetzten Filterbeutels anzeigende AnzeigevorrichtungA display device attached to a vacuum cleaner housing and showing the degree of filling of a filter bag inserted in the vacuum cleaner housing

Die Erfindung betrifft eine an einem Staubsaugergehäuse angebaute Anzeigevorrichtung gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a display device mounted on a vacuum cleaner housing according to the preamble of claim 1.

Eine solche Anzeigevorrichtung wird in der älteren EP-A-0 430 146 beschrieben. Bei dieser Anzeigevorrichtung ist das Anschlußstück mit seinem Anschlußende direkt in eine Öffnung in einer den Staubraum des Staubsaugers begrenzenden Wand eingesteckt. Diese Öffnung weist über ihre volle Tiefe eine gleichbleibende Weite auf. Zur Begrenzung der Einstecktiefe ist am Außenumfang des Anschlußendes ein Wulst angeformt, mit dem das Anschlußstück auf der Wand des Staubraumes aufliegt. Um bei einer derartigen Ausbildung des Anschlußendes und der Öffnung eine dichte Verbindung zwischen dem Anschlußstück und der Öffnung zu erreichen, ist entweder eine sehr hohe Paßgenauigkeit zwischen dem Anschlußende und der Öffnung erforderlich oder es muß ein gesondertes Dichtungselement zwischengefügt werden. Dies bedeutet einen erhöhten Fertigungs- und Materialaufwand.Such a display device is described in older EP-A-0 430 146. In this display device, the connection piece is inserted with its connection end directly into an opening in a wall delimiting the dust space of the vacuum cleaner. This opening has a constant width over its full depth. To limit the insertion depth, a bead is formed on the outer circumference of the connection end, with which the connection piece rests on the wall of the dust chamber. In order to achieve a tight connection between the connector and the opening in such a configuration of the connection end and the opening, either a very high accuracy of fit between the connection end and the opening is required or a separate sealing element must be inserted. This means increased manufacturing and material costs.

Durch die DE-A-26 38 672 ist ferner eine an einem Staubsauger angeordnete Anzeigeeinrichtung bekannt, bei der ein Membrankolben vorgesehen ist. Die Membran wird auf ihrer einen Seite mit Atmosphärendruck und auf ihrer anderen Seite mit dem im Staubsaugergehäuse herrschenden Unterdruck beaufschlagt. Die Verbindung der Kontrolleinrichtung mit dem Unterdruckraum erfolgt mittels eines am Gehäuse der Kontrolleinrichtung angeformten Rohransatzes und einer an diesen angeschlossenen und mit dem Innenraum des Staubsaugers verbundenen Leitung. Bei dieser Anzeigeeinrichtung liegt somit keine direkte Verbindung derselben mit dem Unterdruckraum des Staubsaugers vor.From DE-A-26 38 672 a display device arranged on a vacuum cleaner is also known, in which a membrane piston is provided. The diaphragm is subjected to atmospheric pressure on one side and the negative pressure prevailing in the vacuum cleaner housing on the other side. The control device is connected to the vacuum chamber by means of a molded part on the housing of the control device Pipe approach and a line connected to this and connected to the interior of the vacuum cleaner. With this display device there is therefore no direct connection to the vacuum chamber of the vacuum cleaner.

Der Erfindung liegt die Aufgabe zugrunde, eine Anzeigevorrichtung der gattungsgemäßen Art so weiterzubilden, daß ein störungsfreier Anschluß der Anzeigevorrichtung an den Unterdruckraum eines Staubsaugers möglich ist.The invention has for its object to develop a display device of the generic type so that a trouble-free connection of the display device to the vacuum chamber of a vacuum cleaner is possible.

Die Lösung der gestellten Aufgabe gelingt durch die im Kennzeichen des Anspruches 1 angegebenen Merkmale. Eine dichte Verbindung ist somit ohne gesonderten Aufwand möglich.The problem is solved by the features specified in the characterizing part of claim 1. A tight connection is therefore possible without any special effort.

Eine wesentliche Montagevereinfachung ergibt sich dadurch, daß die Einlaßöffnung von einer einen Ring bildenden, in ihrer Stärke zu ihrem freien Ende hin abnehmenden, am Anschlußstück angeformten Dichtlippe umgeben ist. Bei einer solchen Ausgestaltung entfallen zusätzliche Arbeitsvorgänge für das Anbringen von gesonderten Dichtelementen.A significant simplification of the assembly results from the fact that the inlet opening is surrounded by a sealing lip which is formed on the connecting piece and forms a ring, the thickness of which decreases towards its free end. In such a configuration, additional operations for the attachment of separate sealing elements are omitted.

Dies gilt auch für eine die Merkmale des Anspruches 3 aufweisende Anzeigevorrichtung. Hierbei wird die Dichtigkeit für den Anschluß des Rohrteiles an dem Anschlußstutzen des Anschlußstückes durch einen am Außenumfang des Anschlußstutzens vorgesehenen Dichtwulst sichergestellt.This also applies to a display device having the features of claim 3. Here, the tightness for the connection of the pipe part to the connection piece of the connection piece is ensured by a sealing bead provided on the outer circumference of the connection piece.

Vorteilhafterweise kann mit dem Anschlußstück ein am Gehäuse des Staubsaugers befestigbarer Abdeckrahmen verbunden sein. Die Verbindung erfolgt zweckmäßigerweise über ein Filmscharnier, so daß die Teile noch gegeneinander beweglich sind.A cover frame which can be fastened to the housing of the vacuum cleaner can advantageously be connected to the connecting piece. The connection is expediently made via a film hinge, so that the parts are still movable relative to one another.

Anhand eines in der Zeichnung dargestellten Ausführungsbeispieles wird der Anmeldungsgegenstand nachfolgend näher beschrieben. Es zeigt:

FIG 1
ein Anschlußstück und ein mit diesem verbundener Abdeckrahmen einer Anzeigevorrichtung,
FIG 2
eine am Gehäuse eines Staubsauger angebaute Anzeigevorrichtung nach FIG 1,
FIG 3
eine Anzeigevorrichtung im Schnitt entlang der Linie III-III in FIG 2.
The subject of the application is described in more detail below using an exemplary embodiment shown in the drawing. It shows:
FIG. 1
a connecting piece and a cover frame of a display device connected to it,
FIG 2
1 on the housing of a vacuum cleaner mounted display device,
FIG 3
a display device in section along the line III-III in Figure 2.

Mit 1 ist ein Anschlußstück und mit 2 ein über ein Filmscharnier 3 mit dem Anschlußstück 1 verbundener Abdeckrahmen bezeichnet. Das Anschlußstück 1 weist eine Aufnahmebohrung 4 für ein Küken 5 auf, welches zum Einstellen der Ansprechcharakteristik der Anzeigevorrichtung dient. Ferner ist am Anschlußstück 1 eine Einlaßöffnung 6 und eine Auslaßöffnung 7 vorgesehen.1 with a connecting piece and 2 with a via a film hinge 3 connected to the connecting piece 1 cover frame. The connector 1 has a receiving bore 4 for a chick 5, which is used to set the response characteristic of the display device. Furthermore, an inlet opening 6 and an outlet opening 7 are provided on the connection piece 1.

Die Einlaßöffnung 6 ist von einer einen Ring bildenden Dichtlippe 8 umgeben. Die Dichtlippe 8 nimmt in ihrer Stärke zu ihrem freien Ende 9 hin ab. Hierdurch wird die notwendige Elastizität der Dichtlippe 8 erzielt. Die Auslaßöffnung 7 ist von einem an seinem Außenumfang einen Dichtwulst 10 aufweisenden Anschlußstutzen 11 umgeben.The inlet opening 6 is surrounded by a sealing lip 8 forming a ring. The sealing lip 8 decreases in strength towards its free end 9. As a result, the necessary elasticity of the sealing lip 8 is achieved. The outlet opening 7 is surrounded by a connecting piece 11 having a sealing bead 10 on its outer circumference.

Bei der Montage der Anzeigevorrichtung an einem Staubsaugergehäuse 12 wird der Abdeckrahmen 2 um 180° auf das Anschlußstück 1 hin umgeklappt, wie durch einen Pfeil 13 in FIG 1 angedeutet. In FIG 2 ist der Abdeckrahmen 2 in seinem umgeklappten Zustand dargestellt. Das Anschlußstück 1 wird bei der Montage der Anzeigevorrichtung an einem Staubsaugergehäuse mit seiner Dichtlippe 8 in eine als Bohrung 14 ausgebildete Anschlußöffnung eingesteckt, die sich in einer den Unterdruckraum des Staubsaugers begrenzenden Wand 15 befindet. Die Bohrung 14 verläuft zum Unterdruckraum hin konisch verengt. Damit wird unabhängig von irgendwelchen Fertigungstoleranzen ein dichtes Anliegen der Dichtlippe 8 an der Wandung der Bohrung 14 erreicht.When mounting the display device on a vacuum cleaner housing 12, the cover frame 2 is folded down by 180 ° towards the connector 1, as indicated by an arrow 13 in FIG. In Figure 2, the cover frame 2 is shown in its folded state. The connector 1 is in the assembly of the display device on a vacuum cleaner housing with its sealing lip 8 in a connection opening formed as a bore 14 inserted, which is located in a wall 15 delimiting the vacuum chamber of the vacuum cleaner. The bore 14 is tapered towards the vacuum chamber. This ensures that the sealing lip 8 bears tightly against the wall of the bore 14 regardless of any manufacturing tolerances.

Auf den Anschlußstutzen 11 ist ein aus durchsichtigem Material (Glas oder Kunststoff) bestehendes den Kolbenraum bildendes Rohrteil 16 mit seinem einen Ende 17 aufgesteckt. Das Rohrteil 16 wird durch seitliche Wandteile 18 und durch einen Anschlag 19 des Abdeckrahmens 2 gehalten. Im Rohrteil 16 ist ein mit einer Rückstellfeder 20 gekoppelter Kolben 21 verschiebbar angeordnet. Das andere Ende 22 des Rohrteiles 16 steht über ein zwischen dem Abdeckrahmen 2 und dem Staubsaugergehäuse 12 gebildeten Verbindungskanal 23 mit einer zur Atmosphäre führenden Öffnung 24 des Abdeckrahmens 2 in Verbindung. An dem Abdeckrahmen 2 ist ferner ein den Rohrteil 16 freilassender Ausschnitt 25 vorgesehen. Durch diesen Ausschnitt 25 kann der im Rohrteil 16 proportional zu der zwischen Atmosphäre und Unterdruck bestehenden Druckdifferenz verstellte Kolben 21 beobachtet werden. Die Verstellstrecke des Kolbens 21 ist ein Maß für den Füllgrad des Filterbeutels.A pipe part 16, which forms the piston space and is made of transparent material (glass or plastic), is plugged onto the connecting piece 11 with its one end 17. The tubular part 16 is held by side wall parts 18 and by a stop 19 of the cover frame 2. A piston 21 coupled to a return spring 20 is arranged displaceably in the tubular part 16. The other end 22 of the tubular part 16 is connected via a connecting channel 23 formed between the cover frame 2 and the vacuum cleaner housing 12 to an opening 24 of the cover frame 2 leading to the atmosphere. On the cover frame 2 there is also a cutout 25 which leaves the tubular part 16 free. Through this cutout 25, the piston 21 adjusted in the tube part 16 in proportion to the pressure difference existing between atmosphere and negative pressure can be observed. The adjustment distance of the piston 21 is a measure of the degree of filling of the filter bag.

Dadurch, daß sowohl an der Einlaßöffnung 6 als auch an der Auslaßöffnung 7 des Anschlußstückes 1 die für den jeweiligen Anschluß notwendigen Dichtelemente (Dichtlippe 8 bzw. Dichtwulst 10) angeformt sind, erübrigt sich eine gesonderte Montage solcher Teile. Darüber hinaus wird durch solche Elemente eine praktisch störungsfreie Abdichtung erreicht, da keine zu Undichtigkeiten führenden Verschiebungen wie bei gesonderten Teilen möglich sind.Characterized in that the sealing elements (sealing lip 8 or sealing bead 10) necessary for the respective connection are formed on both the inlet opening 6 and the outlet opening 7 of the connector 1, a separate installation of such parts is unnecessary. In addition, such elements achieve a practically trouble-free seal, since no displacements leading to leaks are possible, as is the case with separate parts.

Claims (6)

  1. Indicating device which is attached to a vacuum cleaner housing and indicates the filling ratio of a filter bag inserted in the vacuum cleaner housing and in which device in the plunger chamber of a plunger housing (16) a plunger (21) is arranged in a displaceable manner, connected with a restoring spring and also directly or indirectly coupled with an indicating element, and in which device, furthermore, the plunger chamber communicates on its one side with the atmospheric pressure and on its other side, by way of a connecting piece (1) provided with an inlet and an outlet opening (6, 7), with the low pressure prevailing in the vacuum cleaner, for which purpose the inlet opening (6) of the connecting piece is connected tightly to a connection opening (14) provided in a wall (15) of the low pressure chamber of the vacuum cleaner housing and the outlet opening (7) of the connecting piece is connected tightly to the plunger chamber, with the inlet opening (6) of the connecting piece (1) being formed so as to be round, characterised in that the inlet opening is formed through a sealing element (8) which is developed such that it rests tightly against the wall of the connection opening (14) formed as a round bore hole (14) and narrowed conically towards the low pressure chamber.
  2. Indicating device according to claim 1, characterised in that the inlet opening (6) is surrounded by a sealing lip (8) which forms a ring, diminishes in terms of its thickness towards its free end (9) and is pre-formed on the connecting piece (1).
  3. Indicating device according to claim 1 or 2, characterised in that the outlet opening (7) of the connecting piece (1) is surrounded by a connector (11) onto which a tubular portion (16) forming the plunger chamber can be plugged.
  4. Indicating device according to claim 3, characterised in that a sealing bead (10) is provided on the outer periphery of the connector (11).
  5. Indicating device according to one or several of the preceding claims, characterised in that a cover frame (2), which can be secured to the housing of the vacuum cleaner, is connected with the connection piece (1) in one piece therewith.
  6. Indicating device according to claim 5, characterised in that the connecting piece (1) and the cover frame (2) are connected with each other by way of a film hinge (3).
EP91111498A 1990-07-24 1991-07-10 Dust collector level indicating device Expired - Lifetime EP0468282B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9010969U 1990-07-24
DE9010969U DE9010969U1 (en) 1990-07-24 1990-07-24 Display device for the filling level of a filter bag used in a vacuum cleaner

Publications (2)

Publication Number Publication Date
EP0468282A1 EP0468282A1 (en) 1992-01-29
EP0468282B1 true EP0468282B1 (en) 1994-05-18

Family

ID=6855897

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91111498A Expired - Lifetime EP0468282B1 (en) 1990-07-24 1991-07-10 Dust collector level indicating device

Country Status (3)

Country Link
EP (1) EP0468282B1 (en)
DE (2) DE9010969U1 (en)
ES (1) ES2053246T3 (en)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3119369A (en) * 1960-12-28 1964-01-28 Ametek Inc Device for indicating fluid flow
SE362784B (en) * 1972-02-11 1973-12-27 Electrolux Ab
DE2246961A1 (en) * 1972-09-25 1974-04-04 Siemens Elektrogeraete Gmbh DISPLAY DEVICE FOR THE FILLING LEVEL OF A VACUUM CLEANER FILTER
SE394076B (en) * 1975-08-29 1977-06-06 Electrolux Ab VACUUM CLEANER INDICATOR DEVICE.
DD130554A1 (en) * 1977-03-02 1978-04-12 Herbert Haeske MEANS FOR REGULATING AND DISPLAYING THE SUCTION POWER OF VACUUM CLEANERS
DE3147999A1 (en) * 1981-12-04 1983-06-16 Vorwerk & Co Interholding Gmbh, 5600 Wuppertal PRESSURE INQUIRY FOR VACUUM CLEANERS
DE3300250C2 (en) * 1983-01-05 1985-10-31 Siemens AG, 1000 Berlin und 8000 München Display device for the filling level of a vacuum cleaner filter bag
DE8711958U1 (en) * 1987-09-03 1988-12-29 Siemens AG, 1000 Berlin und 8000 München Display device for the filling level of a vacuum cleaner filter
DE3904398A1 (en) * 1989-02-14 1990-08-16 Mauz & Pfeiffer Progress VACUUM CLEANER
DE69016608T2 (en) * 1989-11-27 1995-06-14 Matsushita Electric Ind Co Ltd Dust level indicator for vacuum cleaners.

Also Published As

Publication number Publication date
DE9010969U1 (en) 1991-11-28
DE59101651D1 (en) 1994-06-23
ES2053246T3 (en) 1994-07-16
EP0468282A1 (en) 1992-01-29

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