EP0187938A1 - Dispositif d'affichage logé dans le boîtier d'un aspirateur et indicant le taux de remplissage du filtre collecteur de poussières - Google Patents

Dispositif d'affichage logé dans le boîtier d'un aspirateur et indicant le taux de remplissage du filtre collecteur de poussières Download PDF

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Publication number
EP0187938A1
EP0187938A1 EP85115314A EP85115314A EP0187938A1 EP 0187938 A1 EP0187938 A1 EP 0187938A1 EP 85115314 A EP85115314 A EP 85115314A EP 85115314 A EP85115314 A EP 85115314A EP 0187938 A1 EP0187938 A1 EP 0187938A1
Authority
EP
European Patent Office
Prior art keywords
membrane
filter bag
dust filter
vacuum cleaner
plate
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Withdrawn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
EP85115314A
Other languages
German (de)
English (en)
Inventor
Frieder Dr. Voigt
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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, Siemens Corp filed Critical Siemens AG
Publication of EP0187938A1 publication Critical patent/EP0187938A1/fr
Withdrawn legal-status Critical Current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
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/19—Means for monitoring filtering operation

Definitions

  • the invention relates to a device on a vacuum cleaner housing for indicating the degree of filling of the dust filter bag, in which a drive part is provided which is held in its starting position by spring force and can be deflected by a force corresponding to the degree of filling and which actuates a display element which is perceptible from the outside.
  • Such a device is known from DE-GM 69 20 047.
  • a membrane is deflected by the pressure difference prevailing before and after the dust filter bag.
  • a closed space is provided on each side of the membrane.
  • One room is connected via a connecting line to the room behind the dust filter bag and the other room via a connecting line to the room in front of the dust filter bag.
  • a rotatably arranged plate is provided as a display element, which is driven by the up and down movement of the membrane and can be observed through a sight glass provided in the vacuum cleaner housing.
  • the invention has for its object to design a device of the type described above so that the design effort is significantly reduced.
  • the drive part is plate-shaped, in the vacuum cleaner housing in the area of the accumulated dirt loaded side of the dust filter bag is arranged opposite side and is surrounded by a protruding edge opposite its plate level, through which the outside of the dust filter bag is held at a distance from the drive part.
  • the drive part is no longer deflected by a pressure difference acting on it, but rather by the kinetic energy of the amount of air impinging on it.
  • the surface of the dust filter bag that is not yet contaminated by dirt becomes smaller and smaller, so that the air flow passes through the dust filter bag at a higher speed and thus the force on the drive part increases.
  • the drive part is therefore deflected more and more with increasing filter filling and the display element is adjusted accordingly.
  • a particularly low motor effort results from the fact that the drive part is designed in the manner of a membrane and is provided with a U-shaped fastening edge which projects axially on the side of the membrane facing away from the display element relative to the membrane plane and its open side to that with the display element coupled side of the membrane has.
  • the membrane formed in this way is pressed onto the supporting edge with its U-shaped fastening edge. This means that no separate fastening and sealing elements are required for the drive part.
  • a further simplification of assembly results from the fact that a plunger passing through an opening in the vacuum cleaner housing is integrally formed on the membrane as a display element.
  • the device can thus be fully assembled in a single assembly process.
  • a further embodiment variant of the device is characterized in that a plate, which is held by the spring force in its initial position, is adjustably arranged as the drive part in the space delimited by the support edge.
  • a plate is advantageously connected to a plunger which passes through an opening in the vacuum cleaner housing and onto which a helical spring which is supported at one end on the vacuum cleaner housing is fitted as a return spring.
  • a support edge 2 is formed with a wall of a vacuum cleaner housing, on the inside of which a support edge 2 is formed.
  • the support edge 2 is expediently annular.
  • a membrane 4 is inserted into the space 3 delimited by the annular support edge 2.
  • a plunger 5 is formed on the membrane 4, which passes through an opening 6 in the wall 1 of the vacuum cleaner housing occurs.
  • a protective collar 7 is formed on the wall 1 at a short distance from the opening 6.
  • a U-shaped fastening edge 8 is formed on the outer periphery of the membrane 4 in such a way that its open side faces the side of the membrane coupled to the tappet. With this U-shaped fastening edge 8, the membrane 3 is placed on the support edge 2.
  • the opening of the U-shaped mounting edge 8 is adapted to the thickness of the support edge 2 such that a tight fit of the membrane 4 on the support edge 2 and a sufficient seal of the space 3 enclosed by the support edge 2 and the membrane 4 is achieved.
  • a dust filter bag 9 arranged in the vacuum cleaner housing lies against the ring surface 10 of the fastening edge 8 lying parallel to the plane of the membrane 4 under the influence of the sucked-in air. So that the dust filter bag 9 does not come into contact with the membrane 4, the fastening edge 8 projects in relation to the plane of the membrane 4 in the axial direction by a dimension a.
  • the setup works as follows. During suction, part of the air sucked into the dust filter bag 9 passes through the area of the dust filter bag 9 opposite the membrane 4, as indicated by arrows 11, and strikes the membrane 4. The membrane 4 is deflected by the kinetic energy inherent in the amount of air, as shown in dashed lines. If there is still no dirt in the dust filter bag 9, the entire filter surface is available for the passage of the air, so that the air passes through the walls of the dust filter bag 9 at a relatively low speed. The kinetic energy inherent in the air is therefore relatively small and can hardly or only slightly deflect the membrane 4. With to Increasing filling of the dust filter bag 9 reduces the area available for the passage of air, which results in an increase in the passage speed of the air.
  • the air striking the membrane 4 now has a greater energy and is thus able to deflect the membrane 4 more strongly.
  • the annular surface 10 of the fastening edge 8 can be provided with ribs or depressions which extend over the full width of the annular surface 10. In this way, compared to the dust filter bag lying on the annular surface 10, 9 small channels are created through which the air can flow out better.
  • a dust filter bag 9 is suspended in the housing part 12 of the brush vacuum cleaner, which is also upright during suction.
  • the sucked-up dirt thus collects in the lower area of the dust filter bag 9.
  • the device for displaying the degree of filling is arranged in the upper area of the dust filter bag 9 on the housing part 12.
  • This part of the dust filter bag 9 remains relatively dirt-free even when the bag is heavily filled, so that with increasing filter filling, the air passes through the wall of the dust filter bag 9 at an ever higher speed and an ever greater deflection of the membrane 4 and of this coupled plunger 5 causes.
  • the display device can be arranged directly opposite the inlet opening 13 of the dust filter bag 9. This has the advantage that the air hits the location of the dust filter bag 9 directly behind the membrane 4 without further deflection.
  • a plate 14 is adjustably arranged within the support edge 2.
  • a guide rim 15 integrally formed on the plate 14 ensures that the plate 14 is properly guided on the walls of the support rim 2.
  • a helical spring 16 is fitted, which is guided through the plunger 5.
  • the starting position of the plate 14 can be fixed by a stop provided on the support edge, against which the plate 14 is pressed by the helical spring 16.
  • the plate 14 is then under prestress and the device only works when a pressure corresponding to this prestress is exerted on the plate 14 by the blowing air impinging on the plate 14. It is also possible to do without such a stop.
  • the coil spring 16 adjusts the tel. ler 14 dam until it is completely relaxed. In this case, the plate 14 is adjusted immediately when blowing air hits it.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)
EP85115314A 1984-12-17 1985-12-03 Dispositif d'affichage logé dans le boîtier d'un aspirateur et indicant le taux de remplissage du filtre collecteur de poussières Withdrawn EP0187938A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3446003 1984-12-17
DE3446003 1984-12-17

Publications (1)

Publication Number Publication Date
EP0187938A1 true EP0187938A1 (fr) 1986-07-23

Family

ID=6253002

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85115314A Withdrawn EP0187938A1 (fr) 1984-12-17 1985-12-03 Dispositif d'affichage logé dans le boîtier d'un aspirateur et indicant le taux de remplissage du filtre collecteur de poussières

Country Status (1)

Country Link
EP (1) EP0187938A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0301132A1 (fr) * 1987-07-30 1989-02-01 ESTA Apparatebau GmbH & Co. KG Aspirateur pour liquide
CN104068794A (zh) * 2013-03-27 2014-10-01 Lg电子株式会社 吸尘器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE346584C (fr) *
US2114105A (en) * 1935-10-02 1938-04-12 Hoover Co Bag pressure indicator for suction cleaners
FR1268820A (fr) * 1959-09-30 1961-08-04 Siemens Elektrogeraete Gmbh Dispositif signalant l'obstruction d'un filtre d'aspirateur de poussières
GB1072791A (en) * 1964-06-11 1967-06-21 Ass Elect Ind Improvements relating to air filter units
FR2244438A1 (en) * 1973-09-20 1975-04-18 Vorwerk & Co Elektrowerke Kg Vacuum cleaner bag full indicating device - full bag bears on pivoting plate to cause displacement of indicator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE346584C (fr) *
US2114105A (en) * 1935-10-02 1938-04-12 Hoover Co Bag pressure indicator for suction cleaners
FR1268820A (fr) * 1959-09-30 1961-08-04 Siemens Elektrogeraete Gmbh Dispositif signalant l'obstruction d'un filtre d'aspirateur de poussières
GB1072791A (en) * 1964-06-11 1967-06-21 Ass Elect Ind Improvements relating to air filter units
FR2244438A1 (en) * 1973-09-20 1975-04-18 Vorwerk & Co Elektrowerke Kg Vacuum cleaner bag full indicating device - full bag bears on pivoting plate to cause displacement of indicator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0301132A1 (fr) * 1987-07-30 1989-02-01 ESTA Apparatebau GmbH & Co. KG Aspirateur pour liquide
US4976850A (en) * 1987-07-30 1990-12-11 Esta Apparatebau Gmbh & Co. Kg Suction apparatus
CN104068794A (zh) * 2013-03-27 2014-10-01 Lg电子株式会社 吸尘器

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19870123

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Inventor name: VOIGT, FRIEDER, DR.