EP0094360B1 - Luftfilterindikator - Google Patents

Luftfilterindikator Download PDF

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Publication number
EP0094360B1
EP0094360B1 EP83850114A EP83850114A EP0094360B1 EP 0094360 B1 EP0094360 B1 EP 0094360B1 EP 83850114 A EP83850114 A EP 83850114A EP 83850114 A EP83850114 A EP 83850114A EP 0094360 B1 EP0094360 B1 EP 0094360B1
Authority
EP
European Patent Office
Prior art keywords
cell
circuit
voltage
time
current
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
Application number
EP83850114A
Other languages
English (en)
French (fr)
Other versions
EP0094360A1 (de
Inventor
Oskar Arne Andersson
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.)
Electrolux AB
Original Assignee
Electrolux AB
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 Electrolux AB filed Critical Electrolux AB
Priority to AT83850114T priority Critical patent/ATE15537T1/de
Publication of EP0094360A1 publication Critical patent/EP0094360A1/de
Application granted granted Critical
Publication of EP0094360B1 publication Critical patent/EP0094360B1/de
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/20—Removing cooking fumes
    • F24C15/2021—Arrangement or mounting of control or safety systems

Definitions

  • the present invention relates to an arrangement for indication of the need of cleaning of an air filter for instance in a stove hood. After some time of working the cleaning ability of the filter is reduced because of pollution of the filter and the arrangement shall then indicate the need of cleaning of the filter.
  • the arrangement then constituting a time circuit which is programmed by the current of the ventilator motor, in other words, when the ventilator motor is working at the highest capacity an indication is received after for instance 30 hours, when the ventilator motor is working at half the capacity the indication occurs after for instance 50 hours, and when the ventilator is adjusted to the lowest rpm no time counting at all takes place owing to the fact that in this position no pollution will fasten to the filter as the flow speed of air is then so low that the pollution will follow the air through the filter without the time limit for cleaning getting nearer.
  • the present invention it is presented a circuit arrangement with a time circuit where the main component is constituted of a time summing galvanic cell comprising an anode and a cathode and an electrolyte there between.
  • a certain current passes during a time period in the direction anode - cathode whereby a certain quantity of anode material, in this case silver, is transferred to the cathode which e. g. is made of gold.
  • the current is reversed through the cell the silver is transferred back to the anode, but when no more silver remains and gold will not be dissolved, the cell ceases conducting.
  • the voltage over the cell during the electrolysis is about 1 V but increases when the cell is discharged.
  • the transient voltage then occurring can in an arrangement with components be used for emitting a signal.
  • a realization of this principle is featured as the arrangement according to the characterizing clause of claim 1.
  • a current passes between the wires 21 and 19 through i. a. a resistor 22 and a transistor 23 which has a control current via a resistor 24 and diode 25.
  • a thyristor 26 is then connected between a lamp or LED 27 and a connection 28 between the components 22 and 23. The LED lights when the thyristor is switched on by a current to its control electrode 29.
  • Another current circuit can be established through a resistor 38, a pulse switch 39 and a capacitor 40 when a push button 41 on the pulse switch is actuated.
  • the current circuit is created from 21 to 38, 39, 40, 25, 23 and 19 making the capacitor 40 be charged in less than one second. After this the push button is disengaged and the pulse switch is reset into the shown position.
  • the transistor 23 will have a negative control voltage and breaks the circuits 22, 28, 23, 19 and 27, 26, 28, 23, 19.
  • the LED 27 stops lighting.
  • a voltage will arise in the E-cell form 28 to the base of 32.
  • An engaging current will pass from 21 to 22, 28, 34, 32, 19 during a period when the transistor 23 is off, i. e.
  • This step is not reached when the ventilator works at its minimum rpm, whereby a cancellation of time summing at such rpm, as said in the introduction, will automatically occur.
  • the discharging of the E-cell proceeds at a speed proportional to the rpm, and when the cell is totally discharged the current through it ceases and the voltage on the base of the transistor 32 increases so that the transistor starts conducting in the circuit 21, 35, 32,19.
  • a voltage drop occurs in 35 and makes the transistor 36 switch on and, as described before, supplies a starting pulse to the thyristor 26, whereby the LED lights.
  • This is a signal for the need fo cleaning the filter, and when this is done, the push button 41 is re-activated, whereby the E-cell is re-charged, the LED put out and another working period starts.
  • the push button 41 and the LED 27 are positioned in a control panel where also other control members are gathered, however, the push button is separated so that it is not actuated during a working period by mistake.

Landscapes

  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Ventilation (AREA)
  • Color Television Image Signal Generators (AREA)
  • Projection Apparatus (AREA)
  • Glass Compositions (AREA)
  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
  • Electrostatic Separation (AREA)
  • Electric Vacuum Cleaner (AREA)

Claims (5)

1. Anzeigeeinrichtung in einem Luftfilter mit einem von einem Elektromotor angetriebenen Ventilator, welches von Zeit zu Zeit gereinigt werden muß und während des Zeitraumes zwischen den Reinigungen mit unterschiedlicher Kapazität arbeitet, was eine dieser Kapazität proportionale Verschmutzung verursacht, dadurch gekennzeichnet, daß im Stromkreis des Elektromotors ein Widerstand (12) eine Spannung liefert, die eine Stromzufuhr in einem Stromkreis einer Elektrolysezelle (34) mit einem höheren Spannungsabfall beim Entladen als beim Laden ist, und daß ein Detektorkreis, der den Spannungsabfall abfühlt, angeordnet ist, um ein Signal zu liefern, wenn die Zelle entladen wird.
2. Anzeigeeinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß ein zweiter Kreis parallel mit dem Kreis der Zelle mittels eines Umschalters (23, 32) angeordnet ist, der eine zweite Stromzufuhr zur Zelle mit umgekehrter Polarität in bezug auf den Spannungsabfall bildet.
3. Anzeigeeinrichtung nach Anspruch 2, dadurch gekennzeichnet, daß der Detektorkreis ein Verstärkerkreis eines Thyristors (26) ist, der in Serie mit einer Lampe (27) und mit einer Zweigleitung des Umschalters verbunden ist.
4. Anzeigeeinrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die Elektrolysezelle (34) mit dem Eingang des Verstärkerkreises verbunden ist.
5. Anzeigeeinrichtung nach Anspruch 2, dadurch gekennzeichnet, daß der Umschalter mit einem Haltestromkreis versehen ist, der durch einen manuell bedienten Impulsschalter (39) und einen Zeitkreis (40,24,42) gesteuert wird.
EP83850114A 1982-05-11 1983-05-03 Luftfilterindikator Expired EP0094360B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83850114T ATE15537T1 (de) 1982-05-11 1983-05-03 Luftfilterindikator.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8202948A SE431025B (sv) 1982-05-11 1982-05-11 Indikeringsanordning vid luftfilter
SE8202948 1982-05-11

Publications (2)

Publication Number Publication Date
EP0094360A1 EP0094360A1 (de) 1983-11-16
EP0094360B1 true EP0094360B1 (de) 1985-09-11

Family

ID=20346774

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83850114A Expired EP0094360B1 (de) 1982-05-11 1983-05-03 Luftfilterindikator

Country Status (7)

Country Link
EP (1) EP0094360B1 (de)
AT (1) ATE15537T1 (de)
DE (1) DE3360774D1 (de)
DK (1) DK193683A (de)
FI (1) FI831587L (de)
NO (1) NO153383C (de)
SE (1) SE431025B (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10158851A1 (de) 2001-11-30 2003-06-12 Bsh Bosch Siemens Hausgeraete Standzeiterfassungsvorrichtung für einen Filter einer Dunstabzugshaube
DE102010043538A1 (de) 2010-11-08 2012-05-10 BSH Bosch und Siemens Hausgeräte GmbH Filter mit Auswertevorrichtung
CN103672995B (zh) * 2012-08-31 2016-02-10 芜湖美的厨卫电器制造有限公司 吸油烟机的风量自动控制方法及吸油烟机
CN112013435B (zh) * 2019-05-30 2021-11-26 宁波方太厨具有限公司 基于直流电机驱动的吸油烟机自清洁检测方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2353756A1 (de) * 1973-10-26 1975-05-15 Vdo Schindling Wartungs- oder inspektionsanzeigeeinrichtung fuer kraftfahrzeuge
DE2748913C3 (de) * 1977-11-02 1981-11-05 Neff - Werke, Carl Neff Gmbh, 7518 Bretten Dunstabzugshaube mit einer Einrichtung zur Anzeige des Sättigungsgrades für deren Fett- und/oder Geruchsfilter
DE2816406A1 (de) * 1978-04-15 1979-10-18 Weiss Kg Alfons Schaltungsanordnung zur steuerung einer dunstabzugshaube
US4348664A (en) * 1978-10-30 1982-09-07 Elder Pharmaceuticals, Inc. Device for measuring ultraviolet light exposure
DE2852472A1 (de) * 1978-12-05 1980-06-12 Seuffer Robert Gmbh & Co Verfahren und vorrichtung zum erfassen des verschmutzungsgrades eines luftfilters

Also Published As

Publication number Publication date
SE8202948D0 (sv) 1982-05-11
FI831587A7 (fi) 1983-11-12
DE3360774D1 (en) 1985-10-17
SE431025B (sv) 1983-12-27
DK193683A (da) 1983-11-12
NO831665L (no) 1983-11-14
SE8202948L (sv) 1983-11-12
DK193683D0 (da) 1983-05-02
EP0094360A1 (de) 1983-11-16
FI831587L (fi) 1983-11-12
ATE15537T1 (de) 1985-09-15
FI831587A0 (fi) 1983-05-09
NO153383C (no) 1986-03-05
NO153383B (no) 1985-11-25

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