EP1447042B1 - Geschirrspülmaschine mit Trocknungsvorrichtung - Google Patents

Geschirrspülmaschine mit Trocknungsvorrichtung Download PDF

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Publication number
EP1447042B1
EP1447042B1 EP20030002650 EP03002650A EP1447042B1 EP 1447042 B1 EP1447042 B1 EP 1447042B1 EP 20030002650 EP20030002650 EP 20030002650 EP 03002650 A EP03002650 A EP 03002650A EP 1447042 B1 EP1447042 B1 EP 1447042B1
Authority
EP
European Patent Office
Prior art keywords
fan
air
stage
chamber
humid air
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 - Fee Related
Application number
EP20030002650
Other languages
English (en)
French (fr)
Other versions
EP1447042A1 (de
Inventor
Bernhard Mohrbacher
Peter Hagenmüller
Andreas Marettek
Josef Buser
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.)
Whirlpool Corp
Original Assignee
Whirlpool 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 Whirlpool Corp filed Critical Whirlpool Corp
Priority to ES03002650T priority Critical patent/ES2284990T3/es
Priority to DE2003613428 priority patent/DE60313428T2/de
Priority to EP20030002650 priority patent/EP1447042B1/de
Publication of EP1447042A1 publication Critical patent/EP1447042A1/de
Application granted granted Critical
Publication of EP1447042B1 publication Critical patent/EP1447042B1/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/48—Drying arrangements
    • A47L15/483—Drying arrangements by using condensers
    • 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
    • A47L15/486—Blower arrangements

Definitions

  • the present invention relates to a dishwasher with a device for drying dishes with air-cooled condenser. More particularly the present invention relates to a dishwasher having a wash chamber with openings by which humid air is drawn out by a fan and cooled before being returned to the chamber.
  • a dishwasher of this kind is disclosed by EP-A-1142528 in which the humid air drawn out from the wash chamber is cooled by means of a water container before being returned through a flap valve.
  • Such known system works with a water-cooled condenser in circulated-air operation and it achieves insufficient drying results for an initial temperature of under about 63 °C.
  • such known systems are less suitable for hot water connection, and they are more complex and expensive.
  • US-A-5076306 discloses a dishwasher with a dryer, in which the drying air is dehumidified and reused by means of a "U shaped" heat exchanger, provided with a drying air circulating pathway and with an external cooling air pathway.
  • a double face fan running during the drying cycle is common for the two pathways, drawing the air from the heat exchanger. The two air streams remain separate.
  • drying systems are distinguished by the fact that they either operate in exhaust-air operation only, using a condenser with a regular wall thickness typically of more than 1 mm, or that the humid air completely exits to the surroundings, with or without fresh air being added (with or with out mixing control with humid air).
  • a condenser with a regular wall thickness typically of more than 1 mm
  • the humid air completely exits to the surroundings, with or without fresh air being added (with or with out mixing control with humid air).
  • these systems are either not suitable for elevated installation in the fitted kitchen (column mounted) or for a full door or their drying performance is not optimal, i.e. they do not achieve an "A" rating for the drying performance in a drying interval of under 40 min or they need additional heating energy.
  • an object of the present invention is to ensure drying under any installation conditions, at low initial temperature (rinsing temperature at the end below about 59 °C), and high drying performance in a simple manner and securely, quickly, and at low cost.
  • an air-cooled plastic condenser is used.
  • air containing water vapour is removed from the washing area by a suction device through one or more openings in the top area of the wash chamber, it is passed through a condenser outside the washing area and returned to the washing chamber over an adapter piece, while at the same time the condenser, which is specifically designed for this purpose, is cooled by fresh air.
  • the two-stage fan works as follows. The humid air is blown through a humid-air channel and the cooling air (fresh air) is blown through a fresh-air channel.
  • the two channels are in heat-exchange relationship in the condenser (heat exchanger) in a counter-current process. In this process, a predetermined amount of humid air is mixed with the cooling air without exceeding the relative humidity of the surrounding air.
  • a dishwasher 10 comprises a washing chamber 10a containing an upper and a lower basket B1 and B2.
  • the washing chamber 10a presents an upper opening 12 (two in the version shown in figures 2 and 3) connected to a plastic condenser 14 and, through a fan adapter 16, to the inlet of a first stage 18a of a two stages fan 18.
  • the air is sucked by the first stage 18a and then fed by such first stage again to the wash chamber 10a, through the adapter 16 and through an opening 20 placed on the sidewall of the wash chamber.
  • the second stage of the fan 18, indicated as 18b presents a suction opening 22 though which fresh air is blown in the adapter 16 and then on the outside surface of the plastic condenser 14.
  • the drying system basically consists of four parts: a top box 24, the condenser 14, the adapter piece 16 (fan adapter), and the two-stages fan 18.
  • the top box 24 has the task of collecting the humid air which was sucked out of the inside of the washing chamber 10a through one or more openings 12 and leading it to the condenser 14.
  • the top box 24 is attached to the wash chamber 10a with ring nuts 24a.
  • the material of the condenser is a plastic material that usually has insulating properties. However, since the wall thickness is preferably below 1 mm, the heat transmission coefficient is close to that of metals.
  • the plastic condenser 14 is preferably designed as an extrusion profile with an outer wall thickness of about 0.5 mm. The 0.5 mm thick walls are used as a heat transmission surface.
  • the condenser 14 After the water vapour is removed from the air (the condenser 14 is provided with means for discharging the condensed water in the wash chamber 10a, not shown in the drawings), the dried air is led to the fan adapter 16, and from there to the first stage 18a of the two-stage fan wheel 18, after which it is blown back into the wash chamber 10a (see arrows H in figure 5). Inside the wash chamber, the warm dishes saturate the air with humidity again before it runs through the cycle again.
  • the fan 18 (figure 4) comprises a two-stage centrifugal fan wheel 19, the first stage of which is completely inside the fan adapter 16, a separator panel 21, which separates the two stages 18a and 18b from each other, a fan casing 23 for covering the second stage 18b and an electric motor 25 for the drive.
  • the fan wheel 19 comprises a circular plate 19a that, together with the separator panel 21, separates the two stages 18a and 18b of the fan 18. On both sides of the circular plate 19a there are a plurality of shaped fins 19a and 19b respectively.
  • the fan adapter 16 comprises a plastic component 16a which defines an housing 28 for the first stage 18a of the fan wheel 19, having an opening 28a for sucking humid air.
  • the plastic component 16a is also provided with an external shaped side walls 30 and internal partitions 32 which, together with a lid 34, defines the channels either for the flow of humid air toward the first stage 18a of the fan 18 or from the second stage 18b towards the outside surface of the condenser 14. Even if in the example shown in the drawings the fresh air is blown from the fan adapter 16 on the condenser 14, without being guided on it, it is possible to provide a prolonged portion of the adapter 16 or an accessory thereof in order to have a guided fresh air channel along the outside surface of the condenser 14.
  • the humid air from inside the chamber 10a is continuously turned over by the first fan stage 18a, and the humidity is removed.
  • This air recycling creates a light air current inside the chamber, which dries off the last drops on the crockery. Such gentle drying process reduces the stain formation due to quickly drying drops.
  • the second fan stage 18b sucks in fresh air in the base area and the motor compartment, blows it across the condenser 14, and cools it down from the outside on both sides. Then the warmed up cooling air exits into the kitchen through the top area between the working surface and the control panel over the entire width of the dishwasher, creating a barely noticeable and pleasantly warm air current.
  • a defined gap which is created by the opening diameter D for the fan wheel (figure 4) and the outer diameter of the fan wheel 19 itself, ensures that a predetermined part of the pre-condensed humid air can be diverted from inside the chamber to the cooling air channel before it is led back to the inside of the chamber (as indicated by dotted arrows L in figure 6).
  • the amount of the diverted part of warm air is determined by the design of the separator panel 21 in the area of the gap and by the consequently created flow pattern.
  • the diverted air volume is replaced by fresh air, which flows through the regenerating dosage system and the door gaps.
  • the gap is designed as a labyrinth seal, preventing an air exchange.
  • the diversion of a portion of exhaust air can be achieved by a bypass 35 provided in the fan adapter 16.
  • the exhaust air fraction can be adjusted at design level between 0% and approx. 40%, offering high flexibility for different installations of the dishwasher. It is also possible, in the embodiment shown in figure 7, to have an adjustment of the bypass ratio before installing the dishwasher and depending on the working conditions of the appliances (this adjustment can be carried out by the technician installing the appliance or by the customer). In case of high initial temperature (approx. 63 °C) and sufficiency long drying period (approx. 40 min.) drying can even be performed effectively in exclusive circulating-air operation (without any exhaust air).
  • the solution according to the invention may be used for integrated dishwashers with full door without the need for the customer to make an opening in the continuous kitchen base or the door decor.
  • the cooling current exits into the surroundings between the working surface and the control panel across the entire width, creating a pleasantly warm and barely noticeable airflow. Consequently, installation at a higher level than the floor (fully built-in) in the fitted kitchen becomes possible.
  • the dishwasher may be connected either to cold or hot water; there is no condensation on floor or furniture; drying does not require additional energy; the emission of detergent and rinse aid to the surroundings (kitchen) is reduced to a minimum; the initial temperature for drying may be below 59 °C, with related energy saving.

Claims (7)

  1. Geschirrspülmaschine mit einer Waschkammer (10a) mit Öffnungen (12, 20), über die feuchte Luft über ein Gebläse abgesogen und vor dem Rückführen zu der Kammer gekühlt wird, wobei das Gebläse (18) zwei Stufen (18a, 18b) aufweist, eine erste Stufe (18a) zum Abziehen der feuchten Luft und zum Wiedereinführen in die Waschkammer (10a), sowie eine zweite Stufe (18b) zum Ansaugen frischer Luft und zum Verwenden der frischen Luft zum Abkühlen der aus der Waschkammer (10a) abgezogenen feuchten Luft, dadurch gekennzeichnet, dass das Gebläse (18) so angepasst ist, dass es einen Luftdurchgang von seiner ersten Stufe (18a) zu seiner zweiten Stufe (18b) bereitstellt, um einen vorbestimmten Teil der von der Waschkammer abgesogenen feuchten Luft nach außen abzugeben.
  2. Geschirrspülmaschine nach Anspruch 1, dadurch gekennzeichnet, dass ein derartiger Luftdurchgang über einen vorbestimmten Spalt zwischen einem Gebläserad (19, 19a) und einem Gehäuse (21, 28) des Gebläses (18) definiert ist.
  3. Geschirrspülmaschine gemäß Anspruch 1, dadurch gekennzeichnet, dass ein derartiger Luftdurchgang über eine Umgehungs-Öffnung (35) in dem Gehäuse (21, 28) des Gebläses (18) definiert ist.
  4. Geschirrspülmaschine nach Anspruch 1, dadurch gekennzeichnet, dass sie eine Kondensationskammer (14) umfasst, in die die von der ersten Stufe (18a) des Gebläses abgesogene feuchte Luft hineinströmt, die zweite Stufe (18b) des Gebläses frische Luft entlang einer äußeren Oberfläche der Kondensationskammer (14) bläst.
  5. Geschirrspülmaschine gemäß Anspruch 4, dadurch gekennzeichnet, dass die frische Luft im Wesentlichen im Gegenstrom zur in der Kondensationskammer (14) strömenden feuchten Luft geblasen wird.
  6. Geschirrspülmaschine gemäß Anspruch 4, dadurch gekennzeichnet, dass sie Adapterelemente (16) umfasst, die zwischen dem Gebläse (18) und der Waschkammer (10a) eingesetzt sind und so angepasst sind, dass sie feuchte Luft von der Waschkammer (10a) sammeln, um diese feuchte Luft auf die erste Stufe (18a) des Gebläses (18) zu richten, um die durch die erste Stufe (18a) zur Kondensationskammer (24) geblasene feuchte Luft auszurichten, und um die durch die zweite Stufe (18b) des Gebläses 818) auf die äußere Oberfläche der Kondensationskammer (24) in Wärmetausch-Beziehung hiermit auszurichten.
  7. Geschirrspülmaschine gemäß einem der voranstehenden Ansprüche, dadurch gekennzeichnet, dass das Gebläse (19) ein Zetrifugalgebläse ist, das ein Gebläserad (19) umfasst, welches eine kreisförmige Platte (19a), an beiden Seiten, an denen eine Vielzahl von Rippen (19c, 19d) platziert sind, aufweist.
EP20030002650 2003-02-11 2003-02-11 Geschirrspülmaschine mit Trocknungsvorrichtung Expired - Fee Related EP1447042B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES03002650T ES2284990T3 (es) 2003-02-11 2003-02-11 Lavavajillas con sistema de secado.
DE2003613428 DE60313428T2 (de) 2003-02-11 2003-02-11 Geschirrspülmaschine mit Trocknungsvorrichtung
EP20030002650 EP1447042B1 (de) 2003-02-11 2003-02-11 Geschirrspülmaschine mit Trocknungsvorrichtung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20030002650 EP1447042B1 (de) 2003-02-11 2003-02-11 Geschirrspülmaschine mit Trocknungsvorrichtung

Publications (2)

Publication Number Publication Date
EP1447042A1 EP1447042A1 (de) 2004-08-18
EP1447042B1 true EP1447042B1 (de) 2007-04-25

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20030002650 Expired - Fee Related EP1447042B1 (de) 2003-02-11 2003-02-11 Geschirrspülmaschine mit Trocknungsvorrichtung

Country Status (3)

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EP (1) EP1447042B1 (de)
DE (1) DE60313428T2 (de)
ES (1) ES2284990T3 (de)

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
US9510728B2 (en) 2014-11-20 2016-12-06 Whilrpool Corporation Reduced vapor dry systems and methods for dishwashers

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101122837B1 (ko) * 2004-10-12 2012-03-21 엘지전자 주식회사 식기 세척기의 응축 장치
DE102007007133A1 (de) * 2007-02-13 2008-08-14 Meiko Maschinenbau Gmbh & Co. Kg Frontlader-Geschirrspülmaschine mit Wärmerückgewinnung
DE602007012517D1 (de) 2007-02-20 2011-03-31 Electrolux Home Prod Corp Trockensystem für eine Geschirrspülmaschine
US7909939B2 (en) 2007-04-25 2011-03-22 Illinois Tool Works, Inc. Humidity reducing exhaust duct for dishwasher
SE531447C2 (sv) * 2007-07-09 2009-04-07 Asko Cylinda Ab Diskmaskin försedd med ett torksystem
WO2013042036A1 (en) * 2011-09-20 2013-03-28 Indesit Company S.P.A. Dishwashing machine with drying system
ITTO20110943A1 (it) * 2011-10-19 2013-04-20 Indesit Co Spa Macchina lavastoviglie
DE102013101861A1 (de) * 2013-02-26 2014-08-28 Miele & Cie. Kg Geschirrspülautomat, insbesondere Haushaltsgeschirrspülmaschine
US10595706B2 (en) 2014-07-23 2020-03-24 Whirlpool Corporation Dishwasher with air system
CN106551666B (zh) * 2015-09-28 2020-01-21 青岛海尔洗碗机有限公司 一种洗碗机用冷凝装置及安装有该冷凝装置的洗碗机
US9943211B2 (en) 2016-04-06 2018-04-17 Whirlpool Corporation Dishwasher with condensing drying system
WO2018104333A1 (en) * 2016-12-06 2018-06-14 J.P.Industries S.P.A. Machine for the drying of dishes or the like and method for the drying of dishes or the like with said machine.
TR201716890A2 (tr) 2017-10-31 2019-05-21 Arcelik As Bi̇r bulaşik maki̇nesi̇
KR102493164B1 (ko) * 2018-02-09 2023-01-27 엘지전자 주식회사 식기세척기
ES2756875A1 (es) * 2018-10-25 2020-04-27 Bsh Electrodomesticos Espana Sa Evitación de la condensación del vapor de agua en la pared exterior de una máquina lavavajillas doméstica.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2003030C (en) * 1988-11-16 1999-10-12 Hajime Suzuki Dish washer with dryer
JPH05211978A (ja) * 1992-02-05 1993-08-24 Toshiba Corp 食器乾燥機
DE19946456A1 (de) * 1999-09-28 2001-04-05 Bsh Bosch Siemens Hausgeraete Haushalt-Geschirrspülmaschine

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
US9510728B2 (en) 2014-11-20 2016-12-06 Whilrpool Corporation Reduced vapor dry systems and methods for dishwashers

Also Published As

Publication number Publication date
EP1447042A1 (de) 2004-08-18
DE60313428T2 (de) 2008-01-10
DE60313428D1 (de) 2007-06-06
ES2284990T3 (es) 2007-11-16

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