EP0374616B1 - Dish-washing machine - Google Patents

Dish-washing machine Download PDF

Info

Publication number
EP0374616B1
EP0374616B1 EP89122636A EP89122636A EP0374616B1 EP 0374616 B1 EP0374616 B1 EP 0374616B1 EP 89122636 A EP89122636 A EP 89122636A EP 89122636 A EP89122636 A EP 89122636A EP 0374616 B1 EP0374616 B1 EP 0374616B1
Authority
EP
European Patent Office
Prior art keywords
working container
fan
air channel
control
dishwasher according
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
EP89122636A
Other languages
German (de)
French (fr)
Other versions
EP0374616A1 (en
Inventor
Heinz Käfferlein
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of EP0374616A1 publication Critical patent/EP0374616A1/en
Application granted granted Critical
Publication of EP0374616B1 publication Critical patent/EP0374616B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/48—Drying arrangements
    • A47L15/488—Connections of the tub with the ambient air, e.g. air intake or venting arrangements

Definitions

  • the invention relates to a dishwasher according to the preamble of claim 1.
  • a known dishwasher of this type there is an outside air duct and a ventilation duct in a door closing the working container, both ducts being assigned a fan wheel of a common blower motor.
  • the outside air duct ends on both sides in the free atmosphere, while the secondary air duct is connected to the interior of the working container via a ventilation opening and opens into the outside air duct after the fan.
  • the mouth of the ventilation channel can be closed by means of a controlled closure flap, and is open if the fan is to be switched on for the dishes cleaned in the working container during the drying cycle to be carried out after the rinsing cycles have ended.
  • the fan wheels of the fan then convey air through both channels, with the moisture-laden exhaust air extracted from the working container mixing with the fresh air from the fresh air channel. This prevents condensation from forming in the channels and concentrated steam from escaping into the installation area of the dishwasher.
  • a specially equipped fan with two fan wheels is required, which also requires a specially adapted fan housing.
  • a door that closes a work container has a vertical outside air duct that opens out freely at its lower and upper ends. In the area of its upper end, a vent opening, which communicates with the working container, opens into this outside air duct.
  • a freely movable flap valve is assigned to the ventilation opening, which opens automatically if there is overpressure in the working container.
  • a fan sits under the bottom wall of the working container, which sucks in fresh air from the machine base and blows it directly into the working container via an exhaust duct with an integrated heating element.
  • all the air conveyed by the fan flows through the working container and the ventilation opening into the outside air duct during the drying cycle, in which a free portion of fresh air from the outside air duct mixes with the moist air emerging from the working container.
  • the mixing ratio between moist exhaust air from the working container and the outside air duct must be such that at the beginning of the drying cycle the very high moisture content of the flushing container exhaust air does not lead to any condensation of the water vapor contained therein at the blow-out point.
  • the amount of air conveyed by the fan must be limited so that there are no unpleasant air drafts for an operator at the outlet end for the mixed air.
  • the invention has for its object to take measures in a dishwasher according to the preamble of claim 1, by which an effective removal of steam and moisture from the working container is possible with little effort.
  • the blow-out air is pressed both into the outside air duct and into the secondary air duct opening into the working container using a simple fan.
  • the fresh air thus blown into the working container can then sweep past the damp, warmed up dishes and absorb moisture, which then enters the outside air duct through the ventilation opening arranged in the upper region of the working container and mixes there with the conveyed fresh air.
  • the distribution of the air flow conveyed by the fan can be set rigidly per se.
  • the fan is followed by a flow divider chamber with an outlet for the outside air duct and an outlet for the secondary air duct, in which a control flap is provided for changing the amount of air flowing out through the ducts.
  • the control flap is controlled so that a smaller amount of fresh air flows into the working container than in the advanced drying process.
  • the control flap can be controlled depending on the moisture content of the air after the opening of the ventilation opening. However, it can also be based on experience can be controlled depending on the time.
  • a control is assigned to the control flap, which can be designed as an electric motor, as a magnet or as an expansion regulator with electrically controllable heating.
  • a heating element can also be arranged in the secondary air duct, which can also be switched depending on the humidity or time-dependent by the program switch controlling the machine program.
  • the ventilation opening is provided with a controllable closure flap to prevent the outflow of moist air outside of the drying cycle.
  • a housing 2 of a household dishwasher surrounds a working container 3, in which spray arms which are rotatably mounted in horizontal planes are arranged below dish racks 4 which do not hold the dishes to be cleaned and which hold dishes.
  • the spray arms are supplied with flushing liquid via lines 5, which are sucked off by a circulation pump 6 from a drain pan 8 let into the bottom 7 of the working container 3 and conveyed individually or together into the lines to the spray arms 4 via a reversing device, not shown.
  • Within the device housing 2 there is a fan 9 in the area below the base 7, the air intake opening 10 of which opens freely in the device housing 2. The fan thus draws in air during operation, which is preheated by the circulation pump and other heat-generating components.
  • a flow divider chamber 12 adjoins the outlet port 11 of the vent door 9, from which a secondary air duct 13 and a fresh air duct 14 branch off.
  • the secondary air duct 13 opens into the work area 3 in the lower area, preferably below the lower spray arm but above the maximum liquid level that occurs, while the fresh air duct 14 leads upwards outside the work area 3, where one in the upper area, in particular above the upper spray arm 4 in the work area 3 provided ventilation opening 15 opens into the fresh air duct 14.
  • the fresh air duct 14 is designed in the region of the vent opening 15 as a mixing chamber 16, from which an exhaust air duct 17 is preferably guided to the front in the region of the door associated with the working container 3 and opens out there freely via an outlet opening.
  • the vent opening 15 is assigned a closure flap 18 which can be actuated by a drive device, in particular an electromagnet 19.
  • a control flap 20 is additionally arranged in the flow dividing chamber 12, with which the flow path to one of the channels 13, 14 can be narrowed alternately. In this case, the control flap 20 is connected to a control 21, via which the control flap can be controlled in a functionally appropriate manner.
  • the dishes present in the working container 3 are dried in a subsequent drying cycle.
  • the otherwise closed closure flap 16 is brought into the open position via the control magnet 19 and the fan 9 is simultaneously started up.
  • fresh air is conveyed via the secondary air duct 13 into the working container 3 and the outside air duct 14.
  • the fresh air conveyed into the working container 3 presses a corresponding amount of moisture-laden exhaust air from the working container 3 via the ventilation opening 15 into the mixing chamber 16, where it mixes with the fresh air conveyed directly into the outside air duct 14 by the fan 9.
  • the Fresh air then no longer has moisture saturation, so that condensation does not take place in the exhaust air duct 17.
  • the moisture that is carried along is also discharged to the outside in such a small amount per unit volume that no recognizable steam vapors emerge from the dishwasher.
  • the control valve 20 can be placed in the flow divider chamber 12 in front of the secondary air duct 13 via the controller 21 so that a relatively small amount of fresh air into the working container at the beginning of the drying cycle 3 flows. With increasing decrease in the moisture content of the exhaust air, the control flap 20 can then be opened further, so that the fresh air portion guided through the working container 3 increases and at the end of the drying cycle the entire fresh air flow conveyed by the fan 9 is guided through the working container 3.
  • the fresh air which has already been preheated in the machine base can also be additionally heated by a heating element 22 arranged in the secondary air duct 13.
  • closure flap 18 instead of the control flap 20 in such a way that the flow cross-section of the ventilation opening 15 that is released by it can be changed as a function of time or moisture. This also makes it possible to change the proportion of fresh air conveyed by the fan 9 into the working container 3 in accordance with the prevailing operating conditions.

Landscapes

  • Washing And Drying Of Tableware (AREA)

Description

Die Erfindung betrifft eine Geschirrspülmaschine gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a dishwasher according to the preamble of claim 1.

Bei einer bekannten Geschirrspülmaschine dieser Art (EP-A-0 239 012) befindet sich in einer den Arbeitsbehälter verschließenden Tür ein Außenluftkanal und ein Entlüftungskanal, wobei beiden Kanälen je ein Ventilatorrad eines gemeinsamen Gebläsemotors zugeordnet ist. Der Außenluftkanal endet beidseitig in der freien Atmosphäre, während der Nebenluftkanal über eine Entlüftungsöffnung mit dem Innenraum des Arbeitsbehälters verbunden ist und nach dem Ventilator in den Außenluftkanal ausmündet. Die Mündungsöffnung des Entlüftungskanals ist mittels einer gesteuerten Verschlußklappe verschließbar, und ist offen, wenn der Ventilator während des nach Beendigung der Spülgänge durchzuführenden Trockenganges für das im Arbeitsbehälter gereinigte Geschirr eingeschaltet werden soll. Die Ventilatorräder des Ventilators fördern dann durch beide Kanäle Luft, wobei sich die aus dem Arbeitsbehälter abgesaugte feuchtigkeitsbeladene Abluft mit der Frischluft aus dem Frischluftkanal vermischt. Hierdurch wird vermieden, daß sich Schwitzwasser in den Kanälen bildet und konzentrierte Dampfschwaden in den Aufstellungsraum der Geschirrspülmaschine austreten. Für diesen Aufbau ist jedoch ein speziell ausgestatteter Ventilator mit zwei Ventilatorrädern erforderlich, der auch ein besonders angepaßtes Gebläsegehäuse erfordert.In a known dishwasher of this type (EP-A-0 239 012) there is an outside air duct and a ventilation duct in a door closing the working container, both ducts being assigned a fan wheel of a common blower motor. The outside air duct ends on both sides in the free atmosphere, while the secondary air duct is connected to the interior of the working container via a ventilation opening and opens into the outside air duct after the fan. The mouth of the ventilation channel can be closed by means of a controlled closure flap, and is open if the fan is to be switched on for the dishes cleaned in the working container during the drying cycle to be carried out after the rinsing cycles have ended. The fan wheels of the fan then convey air through both channels, with the moisture-laden exhaust air extracted from the working container mixing with the fresh air from the fresh air channel. This prevents condensation from forming in the channels and concentrated steam from escaping into the installation area of the dishwasher. For this construction, however, a specially equipped fan with two fan wheels is required, which also requires a specially adapted fan housing.

Bei einer weiteren bekannten Geschirrspülmaschine (US-A-4,188,732) befindet sich in einer einen Arbeitsbehälter verschließenden Tür ein senkrecht verlaufender Außenluftkanal, der an seinem unteren und oberen Ende jeweils frei ausmündet. Im Bereich seines oberen Endes mündet in diesen Außenluftkanal eine Entlüftungsöffnung, die mit dem Arbeitsbehälter kommuniziert. Der Entlüftungsöffnung ist ein frei bewegliches Klappenventil zugeordnet, das bei Überdruck im Arbeitsbehälter selbsttätig öffnet. Unter der Bodenwand des Arbeitsbehälters sitzt ein Ventilator, der Frischluft aus dem Maschinensockel ansaugt und über einen Ausblaskanal mit integriertem Heizelement unmittelbar in den Arbeitsbehälter im Bedarfsfall einbläst. Bei dieser Ausgestaltung strömt die gesamte vom Ventilator geförderte Luft während des Geschirr-Trockenganges durch den Arbeitsbehälter und die Entlüftungsöffnung in den Außenluftkanal, in dem sich zu der feuchten, aus dem Arbeitsbehälter austretenden Luft ein freier Anteil von Frischluft aus dem Außenluftkanal zumischt. Auch hierbei muß das Mischungsverhältnis zwischen feuchter Abluft aus dem Arbeitsbehälter und dem Außenluftkanal so bemessen sein, daß zu Beginn des Trockenganges der sehr hohe Feuchtigkeitsanteil der Spülbehälter-Abluft zu keiner Kondensation des darin enthaltenen Wasserdampfs an der Ausblasstelle führt. Dabei ist die Menge der vom Ventilator geförderten Luft zu begrenzen, damit am Auslaßende für die gemischte Luft keine unangenehmen Luftzugerscheinungen für eine Bedienungsperson entstehen. Mit zunehmender Trocknung des im Arbeitsbehälter befindlichen Geschirrs nimmt dann der Feuchtigkeitsaustrag aus dem Arbeitsbehälter bei gleichbleibendem Mischungsverhältnis von Abluft und durch den Außenluftkanal zuströmender Frischluft ab, so daß auch die Effektivität des Feuchtigkeitsaustrags aus dem Arbeitsbehälter vermindert wird.In another known dishwasher (US Pat. No. 4,188,732), a door that closes a work container has a vertical outside air duct that opens out freely at its lower and upper ends. In the area of its upper end, a vent opening, which communicates with the working container, opens into this outside air duct. A freely movable flap valve is assigned to the ventilation opening, which opens automatically if there is overpressure in the working container. A fan sits under the bottom wall of the working container, which sucks in fresh air from the machine base and blows it directly into the working container via an exhaust duct with an integrated heating element. In this embodiment, all the air conveyed by the fan flows through the working container and the ventilation opening into the outside air duct during the drying cycle, in which a free portion of fresh air from the outside air duct mixes with the moist air emerging from the working container. Here, too, the mixing ratio between moist exhaust air from the working container and the outside air duct must be such that at the beginning of the drying cycle the very high moisture content of the flushing container exhaust air does not lead to any condensation of the water vapor contained therein at the blow-out point. The amount of air conveyed by the fan must be limited so that there are no unpleasant air drafts for an operator at the outlet end for the mixed air. With increasing drying of the dishes in the work container, the moisture discharge from the work container then decreases with a constant mixture ratio of exhaust air and fresh air flowing in through the outside air duct, so that the effectiveness of the moisture discharge from the work container also is reduced.

Der Erfindung liegt die Aufgabe zugrunde, bei einer Geschirrspülmaschine gemäß dem Oberbegriff des Anspruchs 1 Maßnahmen zu treffen, durch welche eine wirkungsvolle Entfernung von Dampf und Feuchtigkeit aus dem Arbeitsbehälter mit geringem Aufwand möglich wird.The invention has for its object to take measures in a dishwasher according to the preamble of claim 1, by which an effective removal of steam and moisture from the working container is possible with little effort.

Die Lösung dieser Aufgabe erfolgt gemäß der Erfindung durch die kennzeichnenden Merkmale des Anspruchs 1.This object is achieved according to the invention by the characterizing features of claim 1.

Bei einer Ausgestaltung einer Geschirrspülmaschine gemäß der Erfindung wird mit einem einfachen Ventilator die Ausblasluft sowohl in den Außenluftkanal wie auch in den in den Arbeitsbehälter mündenden Nebenluftkanal gedrückt. Die dadurch in den Arbeitsbehälter eingeblasene Frischluft kann dann an dem feuchten, aufgewärmten Geschirr vorbeistreichen und Feuchtigkeit aufnehmen, die danach durch die im oberen Bereich des Arbeitsbehälters angeordnete Entlüftungsöffnung in den Außenluftkanal eintritt und sich dort mit der geförderten Frischluft mischt. Die Aufteilung des vom Ventilator geförderten Luftstroms kann an sich starr eingestellt sein. Es ist jedoch dem Ventilator eine Strömungsteilerkammer mit einem Ausgang für den Außenluftkanal und einem Ausgang für den Nebenluftkanal nachgeschaltet, in der sich eine Steuerklappe zur Veränderung der durch die Kanäle abströmenden Luftmenge vorgesehen ist. So wird beispielsweise bei hohem Feuchtigkeitsgehalt der Luft im Arbeitsbehälter die Steuerklappe so gesteuert, daß eine geringere Frischluftmenge in den Arbeitsbehälter einströmt als bei fortgeschrittenem Trocknungsprozeß. Dabei kann die Steuerklappe in Abhängigkeit von dem Feuchtigkeitsgehalt der Luft nach der Einmündung der Entlüftungsöffnung gesteuert sein. Sie kann jedoch auch nach Erfahrungswerten zeitabhängig gesteuert werden. Hierzu ist der Steuerklappe eine Steuerung zugeordnet, die als Elektromotor, als Magnet oder als Ausdehnungsregler mit elektrisch steuerbarer Heizung ausgebildet sein kann. Zur Unterstützung des Trocknungsvorganges kann auch im Nebenluftkanal ein Heizelement angeordnet werden, das ebenfalls feuchtigkeitsabhängig oder zeitabhängig vom das Maschinenprogramm steuernden Programmschaltwerk geschaltet werden kann. Im übrigen ist die Entlüftungsöffnung mit einer steuerbaren Verschlußklappe versehen, um das Abströmen von feuchter Luft außerhalb des Trocknungsganges verhindern zu Können.In one embodiment of a dishwasher according to the invention, the blow-out air is pressed both into the outside air duct and into the secondary air duct opening into the working container using a simple fan. The fresh air thus blown into the working container can then sweep past the damp, warmed up dishes and absorb moisture, which then enters the outside air duct through the ventilation opening arranged in the upper region of the working container and mixes there with the conveyed fresh air. The distribution of the air flow conveyed by the fan can be set rigidly per se. However, the fan is followed by a flow divider chamber with an outlet for the outside air duct and an outlet for the secondary air duct, in which a control flap is provided for changing the amount of air flowing out through the ducts. For example, when the air in the working container has a high moisture content, the control flap is controlled so that a smaller amount of fresh air flows into the working container than in the advanced drying process. The control flap can be controlled depending on the moisture content of the air after the opening of the ventilation opening. However, it can also be based on experience can be controlled depending on the time. For this purpose, a control is assigned to the control flap, which can be designed as an electric motor, as a magnet or as an expansion regulator with electrically controllable heating. To support the drying process, a heating element can also be arranged in the secondary air duct, which can also be switched depending on the humidity or time-dependent by the program switch controlling the machine program. In addition, the ventilation opening is provided with a controllable closure flap to prevent the outflow of moist air outside of the drying cycle.

Die Erfindung ist nachfolgend anhand der Prinzipskizze einer teilweise und schematisch dargestellten Geschirrspülmaschine näher erläutert.The invention is explained in more detail below on the basis of the schematic diagram of a dishwasher, shown partly and schematically.

Ein teilweise dargestelltes, mit einer Arbeitsplatte 1 versehenes Gehäuse 2 einer Haushalts-Geschirrspülmaschine umgreift einen Arbeitsbehälter 3, in dem in horizontalen Ebenen drehbar gelagerte Sprüharme unterhalb von nicht dargestellten, das zu reinigende Geschirr aufnehmenden Geschirrkörben 4 angeordnet sind. Die Spüharme werden über Leitungen 5 mit Spülflüssigkeit versorgt, die von einer Umwälzpumpe 6 aus einer in den Boden 7 des Arbeitsbehälters 3 eingelassenen Ablaufwanne 8 abgesaugt und über eine nicht dargestellte Umsteuervorrichtung einzel oder zusammen in die Leitungen zu den Sprüharmen 4 gefördert wird. Innerhalb des Gerätegehäuses 2 befindet sich im Bereich unterhalb des Bodens 7 ein Ventilator 9, dessen Luftansaugöffnung 10 frei im Gerätegehäuse 2 ausmündet. Der Ventilator saugt somit im Betrieb Luft an, die durch die Umwälzpumpe und andere wärmeerzeugende Bauelemente vorgewärmt ist. An den Ausblasstutzen 11 des Ventialtors 9 schließt sich eine Strömungsteilerkammer 12 an, von der ein Nebenluftkanal 13 und ein Frischluftkanal 14 abzweigen. Der Nebenluftkanal 13 mündet im unteren Bereich, vorzugsweise unterhalb des unteren Sprüharmes aber oberhalb des maximalen auftretenden Flüssigkeitsniveaus in den Arbeitsbehälter 3 aus, während der Frischluftkanal 14 außerhalb des Arbeitsbehälters 3 nach oben geführt ist, wo eine im oberen Bereich, insbesondere oberhalb des oberen Sprüharms 4 im Arbeitsbehälter 3 vorgesehene Entlüftungsöffnung 15 in den Frischluftkanal 14 mündet. Der Frischluftkanal 14 ist im Bereich der Entlüftungsöffnung 15 als Mischkammer 16 ausgebildet, von der ein Abluftkanal 17 vorzugsweise zur Frontseite im Bereich der dem Arbeitsbehälter 3 zugeordneten Tür geführt ist und dort über eine Ausblasöffnung frei ausmündet. Der Entlüftungsöffnung 15 ist eine Verschlußklappe 18 zugeordnet, die von einer Antriebseinrichtung, insbesondere einem Elektromagnet 19 betätigbar ist. In der Strömungsteilerkammer 12 ist zusätzlich eine Steuerklappe 20 angeordnet, mit der wechselweise der Strömungsweg zu einem der Kanäle 13,14 verengt werden kann. Dabei ist die Steuerklappe 20 mit einer Steuerung 21 verbunden, über die die funktionsgerechte Steuerung der Steuerklappe erfolgen kann.A housing 2 of a household dishwasher, partially shown and provided with a worktop 1, surrounds a working container 3, in which spray arms which are rotatably mounted in horizontal planes are arranged below dish racks 4 which do not hold the dishes to be cleaned and which hold dishes. The spray arms are supplied with flushing liquid via lines 5, which are sucked off by a circulation pump 6 from a drain pan 8 let into the bottom 7 of the working container 3 and conveyed individually or together into the lines to the spray arms 4 via a reversing device, not shown. Within the device housing 2 there is a fan 9 in the area below the base 7, the air intake opening 10 of which opens freely in the device housing 2. The fan thus draws in air during operation, which is preheated by the circulation pump and other heat-generating components. A flow divider chamber 12 adjoins the outlet port 11 of the vent door 9, from which a secondary air duct 13 and a fresh air duct 14 branch off. The secondary air duct 13 opens into the work area 3 in the lower area, preferably below the lower spray arm but above the maximum liquid level that occurs, while the fresh air duct 14 leads upwards outside the work area 3, where one in the upper area, in particular above the upper spray arm 4 in the work area 3 provided ventilation opening 15 opens into the fresh air duct 14. The fresh air duct 14 is designed in the region of the vent opening 15 as a mixing chamber 16, from which an exhaust air duct 17 is preferably guided to the front in the region of the door associated with the working container 3 and opens out there freely via an outlet opening. The vent opening 15 is assigned a closure flap 18 which can be actuated by a drive device, in particular an electromagnet 19. A control flap 20 is additionally arranged in the flow dividing chamber 12, with which the flow path to one of the channels 13, 14 can be narrowed alternately. In this case, the control flap 20 is connected to a control 21, via which the control flap can be controlled in a functionally appropriate manner.

Nach Beendigung der mit Spülflüssigkeit durchzuführenden Reinigungs- und Spülgänge wird in einem anschließenden Trockengang das im Arbeitsbehälter 3 vorhandene Geschirr getrocknet. Hierzu wird die sonst geschlossene Verschlußklappe 16 über den Steuermagnet 19 in Öffnungsstellung gebracht und gleichzeitig der Ventilator 9 in Betrieb gesetzt. Hierdurch wird Frischluft über den Nebenluftkanal 13 in den Arbeitsbehälter 3 und den Außenluftkanal 14 gefördert. Die in den Arbeitsbehälter 3 geförderte Frischluft drückt eine entsprechende Menge von feuchtigkeitsbeladener Abluft aus dem Arbeitsbehälter 3 über die Entlüftungsöffnung 15 in die Mischkammer 16, wo sie sich mit der unmittelbar vom Ventilator 9 in den Außenluftkanal 14 geförderten Frischluft vermischt. Die Frischluft weist dann keine Feuchtigkeitssättigung mehr auf, so daß eine Kondensation im Abluftkanal 17 nicht stattfindet. Auch wird die mitgeführte Feuchtigkeit in so geringer Menge je Volumeneinheit nach außen abgeführt, daß keine erkennbaren Dampfschwaden aus der Geschirrspülmaschine austreten.After the cleaning and rinsing cycles to be carried out with rinsing liquid have ended, the dishes present in the working container 3 are dried in a subsequent drying cycle. For this purpose, the otherwise closed closure flap 16 is brought into the open position via the control magnet 19 and the fan 9 is simultaneously started up. As a result, fresh air is conveyed via the secondary air duct 13 into the working container 3 and the outside air duct 14. The fresh air conveyed into the working container 3 presses a corresponding amount of moisture-laden exhaust air from the working container 3 via the ventilation opening 15 into the mixing chamber 16, where it mixes with the fresh air conveyed directly into the outside air duct 14 by the fan 9. The Fresh air then no longer has moisture saturation, so that condensation does not take place in the exhaust air duct 17. The moisture that is carried along is also discharged to the outside in such a small amount per unit volume that no recognizable steam vapors emerge from the dishwasher.

Nachdem der Feuchtigkeitsgehalt der Abluft des Arbeitsbehälters zu Beginn des Trockenvorganges wesentlich höher liegt als am Ende, kann über die Steuerung 21 die Steuerklappe 20 in der Strömungsteilerkammer 12 so vor den Nebenluftkanal 13 gestellt werden, daß zu Beginn des Trockenganges eine relativ geringe Frischluftmenge in den Arbeitsbehälter 3 einströmt. Mit zunehmendem Absinken des Feuchtigkeitsgehalts der Abluft kann dann die Steuerklappe 20 weiter geöffnet werden, so daß der durch den Arbeitsbehälter 3 geführte Frischluftanteil steigt und am Ende des Trockenganges der gesamte, vom Ventilator 9 geförderte Frischluftstrom durch den Arbeitsbehälter 3 geführt wird. Zur Unterstützung des Trocknungsvorganges kann dabei die im Maschinensockel bereits vorgewärmte Frischluft noch durch ein im Nebenluftkanal 13 angeordnetes Heizelement 22 zusätzlich aufgeheizt werden.After the moisture content of the exhaust air from the working container at the beginning of the drying process is significantly higher than at the end, the control valve 20 can be placed in the flow divider chamber 12 in front of the secondary air duct 13 via the controller 21 so that a relatively small amount of fresh air into the working container at the beginning of the drying cycle 3 flows. With increasing decrease in the moisture content of the exhaust air, the control flap 20 can then be opened further, so that the fresh air portion guided through the working container 3 increases and at the end of the drying cycle the entire fresh air flow conveyed by the fan 9 is guided through the working container 3. To support the drying process, the fresh air which has already been preheated in the machine base can also be additionally heated by a heating element 22 arranged in the secondary air duct 13.

Daneben ist es auch möglich, anstelle der Steuerklappe 20 die Verschlußklappe 18 so auszubilden, daß der von ihr freigegebene Strömungsquerschnitt der Entlüftungsöffnung 15 zeit- oder feuchtigkeitsabhängig veränderbar ist. Auch hierdurch kann der in den Arbeitsbehälter 3 einströmende Anteil der vom Ventilator 9 geförderten Frischluft den herrschenden Betriebsbedingungen entsprechend verändert werden.In addition, it is also possible to design the closure flap 18 instead of the control flap 20 in such a way that the flow cross-section of the ventilation opening 15 that is released by it can be changed as a function of time or moisture. This also makes it possible to change the proportion of fresh air conveyed by the fan 9 into the working container 3 in accordance with the prevailing operating conditions.

Für die Förderung der für den Trockengang erforderlichen Frischluft ist somit nur ein einfacher Ventilator erforderlich, wobei in der nachgeschalteten Verzweigung bzw. im Bereich der Entlüftungsöffnung eine Beeinflussung der durch den Arbeitsbehälter 3 zu führenden Luftmenge mit einfachen Steuermittel vorgenommen werden kann.Only a simple fan is required to convey the fresh air required for the drying cycle, with the downstream branching or in the region of the vent opening, the amount of air to be guided through the working container 3 can be influenced with simple control means.

Claims (6)

  1. Dishwasher, having a working container (3) closable by a door and a ventilating aperture (15) associated with said container and opening into an outside air channel (14), in which a fan (10) is located for drawing in fresh air and which opens out into the atmosphere downstream of the mouth of the ventilating aperture (15), characterised in that a flow dividing chamber (12) with an outlet for the outside air channel (14) and an outlet for a subsidiary air channel (13) is connected in series to the fan (9) in that the subsidiary air channel (13) branches off into the working container (3), and in that a control flap (20) is located in the flow dividing chamber (12) for alternately narrowing the flow path to one of the channels (13, 14) and freeing the path to the other channel (14, 13).
  2. Dishwasher according to claim 1, characterised in that the control flap (20) has a control (21).
  3. Dishwasher according to claim 1 or 2, characterised in that a heating element (22) is disposed in the subsidiary air channel (13).
  4. Dishwasher according to claim 1 or one of the subsequent claims, characterised in that the ventilating aperture (15) is provided with a sealing cap (18) operated as a function of time or humidity.
  5. Dishwasher according to claim 1 or one of the subsequent claims. characterised in that the control flap (20) is operated as a function of the moisture content of the air downstream of the mouth of the ventilation aperture (15) into the outside air channel (14) or as a function of time.
  6. Dishwasher according to claim 2 or one of the subsequent claims, characterised in that the control (21) comprises an electric motor, a magnet or expansion control with electrically controllable heating.
EP89122636A 1988-12-21 1989-12-08 Dish-washing machine Expired - Lifetime EP0374616B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3842997A DE3842997C2 (en) 1988-12-21 1988-12-21 dishwasher
DE3842997 1988-12-21

Publications (2)

Publication Number Publication Date
EP0374616A1 EP0374616A1 (en) 1990-06-27
EP0374616B1 true EP0374616B1 (en) 1994-01-26

Family

ID=6369706

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89122636A Expired - Lifetime EP0374616B1 (en) 1988-12-21 1989-12-08 Dish-washing machine

Country Status (3)

Country Link
EP (1) EP0374616B1 (en)
DE (2) DE3842997C2 (en)
TR (1) TR25336A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8875721B2 (en) 2011-12-15 2014-11-04 Whirlpool Corporation Dishwasher with closed loop condenser

Families Citing this family (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4029958C2 (en) * 1990-05-25 2000-02-10 Aeg Hausgeraete Gmbh Dishwasher with a vent
DE59201390D1 (en) * 1991-07-02 1995-03-23 Miele & Cie Dishwasher with a vent opening connecting the wash cabinet to the ambient air or the like.
DE9421812U1 (en) 1994-10-25 1997-01-23 Bauknecht Hausgeraete Device for drying dishes in a dishwasher
DE4443849A1 (en) * 1994-10-25 1996-05-02 Bauknecht Hausgeraete Method and device for drying dishes in a dishwasher
DE19704430A1 (en) * 1997-02-06 1998-08-13 Whirlpool Co dishwasher
DE602005026916D1 (en) * 2005-05-10 2011-04-28 Electrolux Home Prod Corp dishwasher
TW200916042A (en) 2007-10-11 2009-04-16 Panasonic Corp Dish washing/drying machine
US8746261B2 (en) 2009-12-21 2014-06-10 Whirlpool Corporation Rotating drum filter for a dishwashing machine
US9687135B2 (en) 2009-12-21 2017-06-27 Whirlpool Corporation Automatic dishwasher with pump assembly
US9119515B2 (en) 2010-12-03 2015-09-01 Whirlpool Corporation Dishwasher with unitary wash module
US8627832B2 (en) 2010-12-13 2014-01-14 Whirlpool Corporation Rotating filter for a dishwashing machine
US8667974B2 (en) 2009-12-21 2014-03-11 Whirlpool Corporation Rotating filter for a dishwashing machine
US9918609B2 (en) 2009-12-21 2018-03-20 Whirlpool Corporation Rotating drum filter for a dishwashing machine
US9113766B2 (en) 2010-11-16 2015-08-25 Whirlpool Corporation Method and apparatus for dishwasher with common heating element for multiple treating chambers
US9668636B2 (en) 2010-11-16 2017-06-06 Whirlpool Corporation Method and apparatus for dishwasher with common heating element for multiple treating chambers
US9034112B2 (en) 2010-12-03 2015-05-19 Whirlpool Corporation Dishwasher with shared heater
US9107559B2 (en) 2011-05-16 2015-08-18 Whirlpool Corporation Dishwasher with filter assembly
US8733376B2 (en) 2011-05-16 2014-05-27 Whirlpool Corporation Dishwasher with filter assembly
US9005369B2 (en) 2011-06-20 2015-04-14 Whirlpool Corporation Filter assembly for a dishwasher
US9861251B2 (en) 2011-06-20 2018-01-09 Whirlpool Corporation Filter with artificial boundary for a dishwashing machine
US9265401B2 (en) 2011-06-20 2016-02-23 Whirlpool Corporation Rotating filter for a dishwashing machine
US9010344B2 (en) 2011-06-20 2015-04-21 Whirlpool Corporation Rotating filter for a dishwashing machine
US20120318296A1 (en) 2011-06-20 2012-12-20 Whirlpool Corporation Ultra micron filter for a dishwasher
WO2013097975A1 (en) * 2011-12-29 2013-07-04 Arcelik Anonim Sirketi A washer comprising a dehumidifying unit
US9301667B2 (en) 2012-02-27 2016-04-05 Whirlpool Corporation Soil chopping system for a dishwasher
US9237836B2 (en) 2012-05-30 2016-01-19 Whirlpool Corporation Rotating filter for a dishwasher
US9730570B2 (en) 2012-05-30 2017-08-15 Whirlpool Corporation Reduced sound with a rotating filter for a dishwasher
US9833120B2 (en) 2012-06-01 2017-12-05 Whirlpool Corporation Heating air for drying dishes in a dishwasher using an in-line wash liquid heater
US9451862B2 (en) * 2012-06-01 2016-09-27 Whirlpool Corporation Dishwasher with unitary wash module
US9532700B2 (en) 2012-06-01 2017-01-03 Whirlpool Corporation Dishwasher with overflow conduit
US9554688B2 (en) 2012-10-23 2017-01-31 Whirlpool Corporation Rotating filter for a dishwasher and methods of cleaning a rotating filter
US10595706B2 (en) 2014-07-23 2020-03-24 Whirlpool Corporation Dishwasher with air system
PL4059409T3 (en) * 2021-03-19 2024-04-08 Arçelik Anonim Sirketi A dishwasher providing heat recovery

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3130737A (en) * 1962-10-09 1964-04-28 Gen Electric Automatic dishwashing appliance
US3397708A (en) * 1966-02-01 1968-08-20 Gen Motors Corp Forced air drying system for a dishwasher
US3876469A (en) * 1973-05-23 1975-04-08 Gen Electric Dish-washer vent system
US4188732A (en) * 1978-09-06 1980-02-19 The Maytag Company Dishwasher airflow drying system
DE3418304A1 (en) * 1984-05-17 1985-11-21 Miele & Cie GmbH & Co, 4830 Gütersloh Dish-washing machine
DE3609788A1 (en) * 1986-03-22 1987-09-24 Miele & Cie DISHWASHER
US4709488A (en) * 1986-08-06 1987-12-01 Whirlpool Corporation Venturi air vent for dishwasher

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8875721B2 (en) 2011-12-15 2014-11-04 Whirlpool Corporation Dishwasher with closed loop condenser
DE102012025591B4 (en) 2011-12-15 2024-05-08 Whirlpool Corporation (A Delaware Corporation) Method for operating a dishwasher with a closed condenser circuit

Also Published As

Publication number Publication date
TR25336A (en) 1993-01-06
DE58906828D1 (en) 1994-03-10
DE3842997C2 (en) 1994-09-01
EP0374616A1 (en) 1990-06-27
DE3842997A1 (en) 1990-07-05

Similar Documents

Publication Publication Date Title
EP0374616B1 (en) Dish-washing machine
EP0521815B1 (en) Dishwasher with an opening or similar connecting the washing compartment with the ambient air
DE102005023428A1 (en) Commercial dishwasher
DE19952751B4 (en) Clothes dryer with a self-cleaning lint filter
EP0239012B1 (en) Dishwashing machine
DE19715605B4 (en) incubator
CH630240A5 (en) Hot-air circulating, baking, frying and grilling oven, and method of operating it
DE3831364C2 (en) Dishwasher with a coolant channel
DE2003179C3 (en) Foam cleaning device that can be connected to the exhaust opening of a vacuum cleaner and can be moved independently of it
DE3901170A1 (en) DISHWASHER WITH VENTILATION OPENING
DE10162953A1 (en) Device for the heat treatment of substances, in particular food
DE3244409C2 (en)
DE4029958C2 (en) Dishwasher with a vent
DE19806700C2 (en) Arrangement for drying dishes in a dishwasher
CH676199A5 (en) Appliance for converting sauna cabin to steam bath
DE4209297C2 (en) Treatment facility for the clean room area
EP3786343A1 (en) Laundry treatment device
BE1030620B1 (en) Cooking device and method of operation
DE3633111C2 (en) Device for cleaning large-area textile pads, especially carpets
CH551180A (en) PROCESS AND MACHINE FOR COMBINED WASHING AND DRYING OF DISHES, IN PARTICULAR GLASSES.
DE2115222A1 (en) DRYING CABINET FOR DRYING WET LAUNDRY
CH642157A5 (en) Baking oven
DE1880420U (en) DEFROSTING CABINET WITH VENTILATION.
DE2646903A1 (en) Domestic laundry drying cabinet with heat exchanger - has automatic controls and air circulating system ensuring uniform drying
DE499411C (en) Drying cabinet for pasta

Legal Events

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

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR IT

17P Request for examination filed

Effective date: 19901219

17Q First examination report despatched

Effective date: 19921214

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR IT

REF Corresponds to:

Ref document number: 58906828

Country of ref document: DE

Date of ref document: 19940310

ET Fr: translation filed
ITF It: translation for a ep patent filed

Owner name: MODIANO & ASSOCIATI S.R.L.

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20001219

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20010112

Year of fee payment: 12

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020702

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020830

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20051208