EP2637547B1 - A dishwasher comprising a dehumidifying unit - Google Patents

A dishwasher comprising a dehumidifying unit Download PDF

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Publication number
EP2637547B1
EP2637547B1 EP11779705.0A EP11779705A EP2637547B1 EP 2637547 B1 EP2637547 B1 EP 2637547B1 EP 11779705 A EP11779705 A EP 11779705A EP 2637547 B1 EP2637547 B1 EP 2637547B1
Authority
EP
European Patent Office
Prior art keywords
heater
dishwasher
desiccant material
tub
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.)
Active
Application number
EP11779705.0A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2637547A1 (en
Inventor
Yusuf Koc
Murat Kantas
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.)
Arcelik AS
Original Assignee
Arcelik AS
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 Arcelik AS filed Critical Arcelik AS
Priority to PL11779705T priority Critical patent/PL2637547T3/pl
Publication of EP2637547A1 publication Critical patent/EP2637547A1/en
Application granted granted Critical
Publication of EP2637547B1 publication Critical patent/EP2637547B1/en
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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
    • A47L15/481—Drying arrangements by using water absorbent materials, e.g. Zeolith

Definitions

  • the present invention relates to a dishwasher comprising a dehumidifying unit that provides the dehumidification process to be performed effectively.
  • the dehumidification step is started after the washing and rinsing steps.
  • the dehumidifying step it is aimed to remove the water remaining on the dishes and also to prevent the moisture in the tub from leaving stains on the dishes getting cold by condensing after the rinsing step.
  • the last rinsing step is performed with hot water in order to remove the water remaining on the dishes in an easier way in the dehumidifying step. This requires a great amount of energy to be consumed for heating the water.
  • humid air in the tub is delivered into the air channel disposed between the outer cabinet and the tub by means of a fan. This air is directly discharged outside by means of an opening.
  • an additional air channel that delivers the humid air received from the tub by condensing it thereon is disposed near this line.
  • moisture in the tub cannot be completely discharged and causes stains on the dishes by condensing.
  • dehumidifying elements comprising reversible type moisture adsorbent materials are used.
  • Adsorbent materials can adsorb moisture upto the saturation point and at that moment emit heat to their surroundings.
  • zeolite is used as moisture adsorbent. Humid air received from the tub by means of the fan into the air channel is sent to the zeolite-comprising container and after heating up and leaving its moisture therein, the said air is again directed into the tub.
  • an efficient dehumidification process is realized by evaporating the water on the dishes.
  • zeolite that fills its moisture adsorption capacity is regenerated at the next washing step by being heated up to high temperatures by means of a heater placed therein or thereabout and can be used in the next dehumidification step.
  • zeolite regeneration is realized at very high temperatures, a heater outside the chamber cannot provide an effective regeneration.
  • the heater is disposed inside the chamber, since zeolite particles directly contacting the heater are subject to high amount of heat, they burn and lose their desiccation characteristic after some time. In this case, the dishwasher cannot perform an effective dehumidifying in the course of time and the user thinks that the machine is broken down. And this causes customer dissatisfaction and increase in maintenance and repair rate.
  • a dishwasher comprising a zeolite container positioned around a pipe-type water heater.
  • the zeolite particles contact the heater directly.
  • the residual heat occurring around the heater is used during the water heating process for zeolite regeneration.
  • a dishwasher comprising a chamber having desiccant material therein between the outer cabinet and the tub.
  • at least one heater is disposed between the desiccant materials arranged as plates so as to make thermal contact with the particles.
  • a dishwasher according to the preamble of claim 1 is known for example from DE 10 2008040789 A1 .
  • the aim of the present invention is the realization of a dishwasher comprising a dehumidifying unit the desiccation performance of which is improved.
  • a dehumidifying unit having a desiccant material, a heater and fins disposed on the heater and an air channel providing the connection between the dehumidifying unit and the tub are disposed.
  • the fins prevent the desiccant material particles from contacting the heater by forming a barrier between the desiccant material and the heater.
  • the distance between the consecutive two fins of the heater is smaller than the length of the desiccant material particle.
  • the desiccant material particles are prevented from entering between the heater fins.
  • the heater is placed perpendicular to the air flow, in the chamber at a region near the area where the air enters the chamber.
  • the heater is in pipe form and the fin in circular ring form.
  • the fins are arranged parallel to each other along the heater.
  • the fin is in helical form.
  • the fin extends along the pipe-shaped heater as a single piece.
  • the fins are in needle form.
  • the lengths of the needles and the gaps therebetween are chosen such that the desiccant material does not slip between the needles.
  • the heater is in curved configuration.
  • the heater is formed as an M by being bent preferably at three points ( Figure 3 ).
  • the heater sweeps the vertical cross-section of the chamber and provides a homogeneous heat distribution.
  • the desiccant material has reversible feature.
  • zeolite is used as the desiccant material.
  • the desiccant material particles are prevented from burning and losing their desiccation characteristic during the regeneration of the desiccant material.
  • dehumidifying efficiency of the dishwasher is prevented from decreasing in long term.
  • a homogeneous heat distribution is provided in the chamber, almost all of the desiccant material particles are provided to be regenerated.
  • total dehumidification capacity in the next dehumidifying step increases and hence a more efficient dehumidifying is provided.
  • the dishwasher (1) comprises
  • the dehumidification step is started by operating the fan (6) on the air channel (5).
  • the air sucked by the fan (6) is received into the air channel (5) by means of the outlet (4) on the tub (3) surface.
  • the humid air received into the air channel (5) is sent to the dehumidifying unit (7) disposed under the tub (3) in the direction of the rotational axis of the preferably radial fan (6).
  • the humid air leaves its moisture while moving through the desiccant material (9) disposed in the dehumidifying unit (7) and leaves the dehumidifying unit (7) and returns to the tub (3) by means of the inlet (12).
  • the desiccant material (9) emanates heat due to its thermophysical feature as it retains moisture and transfers this heat to the process air passing therethrough.
  • the process air passing through the dehumidifying unit (7) heats up, the internal temperature of the tub (3) increases and thus the water accumulated on the dishes are provided to be evaporated.
  • the vapor forming passes over again the desiccant material (9) in the dehumidifying unit (7) in the closed cycle and received into the tub (3). After a while, the humid air forming as a result of the water on the dishes and the vaporization of the water is discharged from the tub (3).
  • the heater (10) is not operated at all during the dehumidification step.
  • the desiccant material (9) reaching its saturation point by retaining the moisture of the process air in the dehumidification step is of reversible feature, it is regenerated and regains its desiccant characteristic. This process is realized between the cold washing and the hot washing steps of the next washing program.
  • the temperature of the desiccant material (9) is increased to almost 350°C by operating the heater (10) in the chamber (8) and the desiccant material (9) is provided to be regenerated.
  • the fins (11) prevent the desiccant material (9) particles from contacting the heater (10) by forming a barrier between the desiccant material (9) and the heater (10).
  • the desiccant material (9) particles are prevented from being subjected to high temperatures by contacting the heater (10) and from losing their desiccation characteristic by being burnt.
  • the distance between the consecutive two fins (11) of the heater (10) is smaller than the length of the desiccant material (9) particle ( Figure 2, Figure 3 ).
  • the desiccant material (9) particles are prevented from entering between the heater (10) fins (11).
  • the surface area of the desiccant material (9) particles contacting the heater (10) is decreased and the particles in contact with the heater (10) are prevented from burning by being subjected to high temperatures and from losing their desiccation characteristic. Consequently, this eliminates a possible situation of user dissatisfaction since it prevents the dehumidification performance from decreasing in long term.
  • the heater (10) is placed perpendicular to the air flow, in the chamber (8) at a region near the area where the air enters the chamber (8) ( Figure 2, Figure 3 ).
  • the fan (6) is operated at the same time with the heater (10). While heat transfer to regions near the heater (10) is realized by conduction and heat transfer to regions away from the heater (10) is realized by convection by means of the fan (6) blowing the air coming from tub (3) into the dehumidifying unit (7).
  • a homogeneous heat distribution is provided in the chamber (8).
  • almost whole desiccant material (9) in the chamber (8) is regenerated and the desiccation capacity thereof is provided to be higher in the next dehumidification step.
  • the heater (10) is in pipe form and the fin (11) in circular ring form.
  • the fins (11) are arranged parallel to each other along the heater (10).
  • the fin (11) is in helical form.
  • the fin (11) extends along the pipe-shaped heater (10) as a single piece.
  • the fins (11) are in needle form.
  • the lengths of the needles and the gaps therebetween are chosen such that the desiccant material (9) does not slip between the needles.
  • the heater (10) is in curved configuration.
  • the heater (10) is formed as an M by being bent preferably at three points ( Figure 3 ).
  • the heater (10) sweeps the vertical cross-section of the chamber (8) and provides a homogeneous heat distribution.
  • the desiccant material (9) has reversible feature.
  • zeolite is used as the desiccant material (9).
  • the desiccant material (9) particles are prevented from burning and losing their desiccation characteristic during the regeneration of the desiccant material (9).
  • dehumidifying efficiency of the dishwasher (1) is prevented from decreasing in long term.
  • a homogeneous heat distribution is provided in the chamber (8), almost all of the desiccant material (9) particles are provided to be regenerated.
  • total dehumidification capacity in the next dehumidifying step increases and hence a more efficient dehumidifying is provided.

Landscapes

  • Washing And Drying Of Tableware (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Drying Of Gases (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
EP11779705.0A 2010-11-12 2011-11-11 A dishwasher comprising a dehumidifying unit Active EP2637547B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11779705T PL2637547T3 (pl) 2010-11-12 2011-11-11 Zmywarka do naczyń zawierająca jednostkę usuwającą wilgoć

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR201009477 2010-11-12
PCT/EP2011/069891 WO2012062886A1 (en) 2010-11-12 2011-11-11 A dishwasher comprising a dehumidifying unit

Publications (2)

Publication Number Publication Date
EP2637547A1 EP2637547A1 (en) 2013-09-18
EP2637547B1 true EP2637547B1 (en) 2015-03-04

Family

ID=44913317

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11779705.0A Active EP2637547B1 (en) 2010-11-12 2011-11-11 A dishwasher comprising a dehumidifying unit

Country Status (6)

Country Link
EP (1) EP2637547B1 (pl)
CN (1) CN103188986B (pl)
CA (1) CA2813106C (pl)
PL (1) PL2637547T3 (pl)
WO (1) WO2012062886A1 (pl)
ZA (1) ZA201303404B (pl)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106562737B (zh) * 2016-11-09 2019-09-06 三花亚威科电器设备（芜湖）有限公司 干燥系统和具有其的洗碗机
DE102017202007A1 (de) * 2017-02-08 2018-08-09 E.G.O. Elektro-Gerätebau GmbH Vorrichtung zur Entfeuchtung, Elektrogerät mit einer solchen Vorrichtung und Verfahren zur Entfeuchtung
TR201716890A2 (tr) 2017-10-31 2019-05-21 Arcelik As Bi̇r bulaşik maki̇nesi̇
CN118653284A (zh) * 2024-08-21 2024-09-17 珠海格力电器股份有限公司 一种衣物处理设备及其烘干控制方法、判干方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3830664A1 (de) * 1988-09-09 1990-03-22 Bauknecht Hausgeraete Einrichtung zum trocknen von geschirr in einer haushalt-geschirrspuelmaschine
DE10353774A1 (de) * 2003-07-30 2005-02-24 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspülmaschine
DE10334793A1 (de) * 2003-07-30 2005-02-24 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspülmaschine
DE102005004096A1 (de) * 2004-12-09 2006-06-14 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspülmaschine mit einer Sorptionstrockenvorrichtung
FR2879431B1 (fr) * 2004-12-21 2008-12-05 Brandt Ind Sas Lave-vaisselle et procede de mise en oeuvre du sechage de la vaisselle dans ce lave-vaisselle
DE102008040789A1 (de) * 2008-07-28 2010-02-04 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspülmaschine mit Sorptionstrocknungsvorrichtung
DE102008039896A1 (de) * 2008-08-27 2010-03-04 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspülmaschine mit Sorptionstrockenvorrichtung

Also Published As

Publication number Publication date
WO2012062886A1 (en) 2012-05-18
CN103188986A (zh) 2013-07-03
EP2637547A1 (en) 2013-09-18
CA2813106C (en) 2016-12-13
CA2813106A1 (en) 2012-11-18
CN103188986B (zh) 2015-11-25
ZA201303404B (en) 2014-01-29
PL2637547T3 (pl) 2015-08-31

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