EP0080948B1 - Geräuscharme Geschirrspülmaschine mit beschränktem Wasserverbrauch - Google Patents

Geräuscharme Geschirrspülmaschine mit beschränktem Wasserverbrauch Download PDF

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Publication number
EP0080948B1
EP0080948B1 EP82402158A EP82402158A EP0080948B1 EP 0080948 B1 EP0080948 B1 EP 0080948B1 EP 82402158 A EP82402158 A EP 82402158A EP 82402158 A EP82402158 A EP 82402158A EP 0080948 B1 EP0080948 B1 EP 0080948B1
Authority
EP
European Patent Office
Prior art keywords
pump
water
cycling
dish
pressure
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
EP82402158A
Other languages
English (en)
French (fr)
Other versions
EP0080948A1 (de
Inventor
Benoit Gailledrat
Laurent Didier
Camille Barbier
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.)
Esswein SA
Original Assignee
Esswein SA
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 Esswein SA filed Critical Esswein SA
Publication of EP0080948A1 publication Critical patent/EP0080948A1/de
Application granted granted Critical
Publication of EP0080948B1 publication Critical patent/EP0080948B1/de
Expired legal-status Critical Current

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Classifications

    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00Washing or rinsing machines for crockery or tableware
    • A47L15/42Details
    • A47L15/4244Water-level measuring or regulating arrangements
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00Washing or rinsing machines for crockery or tableware
    • A47L15/42Details
    • A47L15/4209Insulation arrangements, e.g. for sound damping or heat insulation
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00Washing or rinsing machines for crockery or tableware
    • A47L15/42Details
    • A47L15/50Racks ; Baskets
    • A47L15/507Arrangements for extracting racks, e.g. roller supports

Definitions

  • the invention relates to a dishwasher.
  • a dishwasher usually includes a cycling pump that draws water from a tank to spray it onto the dishes to be cleaned. After this projection the water falls back into the tank and is again sucked up by the pump through a filter. There is also a drain pump to empty the tank at the end of the wash.
  • This pump which rotates during this filling, then sucks in a mixture of air and water and the pressure in the pump body is relatively low. This pressure rises suddenly when water enters said conduit, the pump then sucking more air but only water. This sudden increase in pressure is used to interrupt the filling of water.
  • the dishwasher according to the invention which is of the same type as that of US-A-3,415,261, does not have this drawback.
  • the cycling pump comprises, above the blades intended for cycling, auxiliary blades in the vicinity of the duct which suck in air during filling with water so that the pump mixes practically only air during this filling, these auxiliary vanes also making it possible to deactivate the cycling pump during emptying, and in that the body of the cycling pump is such that, when filling with water, the latter cannot enter this body only by its lower part.
  • the vertical duct, or chimney is coaxial with the wheel of the cycling pump.
  • the dishwasher comprises at its base a tank or tank 10 in the bottom of which is disposed the drain pump 12 driven by the shaft 13 of an electric motor 14 installed under the bottom of the tank 10.
  • This shaft 13 is therefore vertical and extends above the drain pump 12 to drive the cycling pump 15, the purpose of which is to draw the water 11 in order to spray it under pressure towards baskets (not shown) containing the dishes to be cleaned.
  • the body 16 of the cycling pump 15 is connected to a first pipe 17 opening into a rotating reel 18 projecting the water onto the dishes.
  • the body of the cycling pump is also connected to another pipe 19 opening into another reel (not shown) located in the upper position in the frame of the dishwasher.
  • the water which has been projected onto the dishes falls back into the tank 10 and is sucked in again by the pump 15 after passing through a filter 40.
  • the pump 15 comprises a impeller driven by the shaft 13.
  • This impeller has a flange 20 (FIG. 2) from the lower face of which protruding vanes 21 intended to ensure the actual cycling and from the upper face of which are protruding other vanes 23 of height slightly lower than that of the vanes 21 and whose role is to deactivate the pump during emptying in order to avoid annoying noises and to prevent priming during filling.
  • the vanes 21 and 23 do not have a radial position; they occupy a certain angular sector.
  • Each blade 21 has a peripheral end 21. and an internal end 21 b ; the angular sector is traversed in the direction of clockwise of 21a to 21b.
  • each blade 23 has a peripheral end 23, and an internal end 23 b .
  • the angular sector is traversed in an anti-clockwise direction from 23. to 23 b .
  • the orientation of the blades 23 is in the opposite direction to the orientation of the blades 21.
  • the body 25 of the drain pump 12 is connected to the evacuation pipe 26 by means of a non-return valve 27 preventing the suction, by the pump 12, of liquid in the pipe 26.
  • the suction end 28 of the cycling pump 15 is at the base of the body 16 of this pump.
  • the body 16 of the cycling pump is extended upwards by a duct or chimney 30 whose axis coincides with that of the shaft 13 and. so with that of the wheels of pumps 12 and 15.
  • the body of the cycling pump 15 is in relation to a pressure switch 31a which thus detects the water pressure produced by this pump.
  • the pressure switch 31a controls a solenoid valve 32 which is open when the tank 10 is to be filled with water.
  • This pressure switch is such that as long as the water pressure it detects is below a PN value ( Figure 3) the solenoid valve 32 remains open while this solenoid valve is closed when the pressure has reached this value p N .
  • this cycling pump can hardly be started as long as the upper end 31 of the chimney 30 is in the air.
  • the water pressure delivered by this pump is therefore relatively low. Its value is noted p 1 in FIG. 3. Although this value does not allow jets of water having the pressure necessary to carry out the washing, however, with this pressure, the pump produces small jets which spray the dishes. These small water jets allow, when the dishwasher is supplied directly with hot water, progressive heating of the dishes and, after washing in hot water, progressive cooling before rinsing in cold water.
  • the pump 15 "does not start until the free surface of the filling water has reached the end 31 and thus enters the body 16 through the chimney 30.
  • the outlet pressure of the pump detected by the pressure switch 31a , then rises sharply and reaches the value p N.
  • the solenoid valve 32 is then closed to stop filling.
  • the pressure p has been plotted on the ordinate and the quantity q of water introduced into the tank on the abscissa.
  • the quantity q 1 corresponds to the moment when the water begins to enter the chimney 30, the free surface having reaches end 31.
  • the pump Once the pump has been primed, it sucks up a greater quantity of water than before it was primed and, consequently, the free surface of the water drops sharply below the level of the end 31. This is however not bothersome because it has been found that the pump does not prime.
  • the solenoid valve 32 is closed as soon as the pressure detected by the pressure switch 31 reaches the value PN, the quantity of water introduced is the quantity q l .
  • a control means is provided to keep the solenoid valve 32 open for a determined time after detection of the priming of the pump. Under these conditions the level of the free surface of the water may, when washing the dishes, be above the level of the end 31.
  • the operation is not noisy because the pump 15 mainly mixes air. It has in fact been found that the pump is noisy when it sucks in a mixture of water and air. As shown in Figure 3, the pump hardly ever works with such a mixture of air and water because the transition between the defused state and the primed state is sudden; this transition is represented by a line segment 35 parallel to the ordinate axis P.

Landscapes

  • Washing And Drying Of Tableware (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Detergent Compositions (AREA)

Claims (7)

1. Geschirrspüler, bei welchem die Beendigung der Wassereinfüllung ausgelöst wird, wenn der im Körper (16) der beim Einfüllen in Betrieb befindlichen Umwälzpumpe (15) herrschende Druck plötzlich ansteigt, wobei dieser Körper (16) beim Einfüllen mit der Atmosphäre in Verbindung ist über eine Leitung (30), deren oberes Ende (31) sich ungefähr auf der gewünschten Höhe der freien Wasseroberfläche in dem Geschirrspüler befindet, dadurch gekennzeichnet, daß die. Umwälzpumpe oberhalb der für die Umwälzung bestimmten Arme (21) Hilfsarme (23) in der Nähe der Leitung (30) aufweist, welche während des Einfüllens von Wasser Luft ansaugen, damit die Pumpe während dieses Einfüllens praktisch nur Luft fördert, wobei diese Hilfsarme es auch ermöglichen, die Umwälzpumpe während des Ablaufs zu entleeren, und daß der Körper (16) der Umwälzpumpe (15) derart ausgebildet ist, daß während des Einfüllens von Wasser letzteres (11) in diesen Körper nur durch dessen unteren Teil (28) eindringen kann.
2. Geschirrspüler nach Anspruch 1, dadurch gekennzeichnet, daß die Leitung (30) senkrecht verläuft.
3. Geschirrspüler nach Anspruch 2, dadurch gekennzeichnet, daß die Leitung (30) koaxial zu dem Umwälzpumpenrad (20, 21, 23) ist.
4. Geschirrspüler nach Anspruch 3, dadurch gekennzeichnet, daß die Umwälzpumpe (15) durch eine Welle (13) angetrieben wird, die ferner die Ablaufpumpe (12) antreibt, wobei diese Welle (13) ihrerseits durch einen Elektromotor (14) angetrieben wird, der zum Umwälzen in einer Drehrichtung und für den Ablauf in der entgegengesetzten Drehrichtung rotiert.
5. Geschirrspüler nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Umwälzpumpe während des Einfüllens einen geringen Wasserdruck erzeugt, der jedoch ein Besprühen des Spülgutes ermöglicht.
6. Geschirrspüler nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß er einen Druckschalter (31a) aufweist, der auf den Druck anspricht, welcher in dem Körper (16) der Umwälzpumpe (15) herrscht und die Beendigung des Einfüllens steuert, sobald der Druck in dem Pumpenkörper dem Anlaufen dieser Pumpe entspricht.
7. Geschirrspüler nach einen der vorstehenden Ansprüche, dadurch gekennzeichnet, daß er eine Einrichtung umfaßt, um eine bestimmte Wassermenge einzuleiten, nachdem der Druck (PN) erfaßt wurde, welcher dem Anlaufen der Umwälzpumpe entspricht.
EP82402158A 1981-12-02 1982-11-26 Geräuscharme Geschirrspülmaschine mit beschränktem Wasserverbrauch Expired EP0080948B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8122587A FR2517194B1 (fr) 1981-12-02 1981-12-02 Lave-vaisselle utilisant une quantite d'eau limitee
FR8122587 1981-12-02

Publications (2)

Publication Number Publication Date
EP0080948A1 EP0080948A1 (de) 1983-06-08
EP0080948B1 true EP0080948B1 (de) 1986-11-12

Family

ID=9264595

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82402158A Expired EP0080948B1 (de) 1981-12-02 1982-11-26 Geräuscharme Geschirrspülmaschine mit beschränktem Wasserverbrauch

Country Status (7)

Country Link
EP (1) EP0080948B1 (de)
AU (1) AU561252B2 (de)
DE (1) DE3274183D1 (de)
FI (1) FI74604C (de)
FR (1) FR2517194B1 (de)
GR (1) GR77111B (de)
NO (1) NO155374C (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11284773B2 (en) 2020-01-31 2022-03-29 Haier Us Appliance Solutions, Inc. System and method for controlling the water fill level within a dishwasher appliance

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL128938A0 (en) * 1999-03-11 2000-02-17 Mind Guard Ltd Implantable stroke treating device
US9751115B2 (en) 2009-08-05 2017-09-05 Electrolux Home Products Corporation N.V. Washer such as a dishwasher or a washing machine and method for operating a washer
PL2283759T3 (pl) 2009-08-05 2015-10-30 Electrolux Home Products Corp Nv Czyszczące na mokro urządzenie, takie jak zmywarka lub pralka oraz sposób obsługiwania czyszczącego na mokro urządzenia
EP2283760A1 (de) * 2009-08-05 2011-02-16 Electrolux Home Products Corporation N.V. Waschvorrichtung wie ein Geschirrspüler oder eine Waschmaschine und Betriebsverfahren für solch eine Waschvorrichtung

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3294102A (en) * 1964-12-09 1966-12-27 Whirlpool Co Dishwashing apparatus having improved pump means
US3415261A (en) * 1966-02-28 1968-12-10 Westinghouse Electric Corp Dishwasher control

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11284773B2 (en) 2020-01-31 2022-03-29 Haier Us Appliance Solutions, Inc. System and method for controlling the water fill level within a dishwasher appliance

Also Published As

Publication number Publication date
FI74604C (fi) 1988-03-10
FI824100A0 (fi) 1982-11-29
AU561252B2 (en) 1987-05-07
NO155374B (no) 1986-12-15
EP0080948A1 (de) 1983-06-08
AU9102982A (en) 1983-06-09
FI74604B (fi) 1987-11-30
NO824029L (no) 1983-06-03
GR77111B (de) 1984-09-06
FR2517194A1 (fr) 1983-06-03
DE3274183D1 (en) 1987-01-02
NO155374C (no) 1987-03-25
FR2517194B1 (fr) 1985-08-09
FI824100L (fi) 1983-06-03

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