EP0978250A2 - Vorrichtung zum Geschirrtrocknen am Ende des Waschverfahrens einer Geschirrspülmaschine - Google Patents

Vorrichtung zum Geschirrtrocknen am Ende des Waschverfahrens einer Geschirrspülmaschine Download PDF

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Publication number
EP0978250A2
EP0978250A2 EP99115218A EP99115218A EP0978250A2 EP 0978250 A2 EP0978250 A2 EP 0978250A2 EP 99115218 A EP99115218 A EP 99115218A EP 99115218 A EP99115218 A EP 99115218A EP 0978250 A2 EP0978250 A2 EP 0978250A2
Authority
EP
European Patent Office
Prior art keywords
duct
tank
dishwasher
outlet
dishes
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.)
Withdrawn
Application number
EP99115218A
Other languages
English (en)
French (fr)
Other versions
EP0978250A3 (de
Inventor
Pietro De Filippis
Flavio Maggi
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.)
Bitron SpA
Original Assignee
Bitron SpA
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 Bitron SpA filed Critical Bitron SpA
Publication of EP0978250A2 publication Critical patent/EP0978250A2/de
Publication of EP0978250A3 publication Critical patent/EP0978250A3/de
Withdrawn legal-status Critical Current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
    • A47L15/481—Drying arrangements by using water absorbent materials, e.g. Zeolith

Definitions

  • the present invention refers to a device for drying the dishes at the end of the washing process of a dishwasher.
  • said steam In order to condense the steam contained in the air, said steam has to transfer heat to a body at a temperature lower than the dew point temperature of the air-steam mixture.
  • Some manufacturers use electric resistors to heat the air inside the dishwasher and therefore to lower the relative humidity, in order to enhance the drying process.
  • the disadvantage of said process is the significant consumption of electric energy. Then, the normal heat dissipation towards the outside environment causes the decrease of the temperature of the tank walls and the condensing of the steam on said walls.
  • the purpose of the present invention is to realise a device to enhance the drying process of the dishes at the end of the washing process of a dishwasher, said device being free from the above described disadvantages.
  • a device for drying the dishes at the end of the washing process of a dishwasher is characterised by comprising a condensing duct connected, at its inlet and outlet sections, to the washing tank of the dishwasher, a forced conduction device of an air-steam mixture along said duct, and heat exchange means positioned along the duct, and maintained at a temperature substantially lower than the dew point temperature of said mixture.
  • numeral 1 indicates, as a whole, a device for drying the dishes at the end of the washing process of a dishwasher 10.
  • the device 1 comprises a condensing duct 11 which extends outside a dish washing tank 12, and said duct is fully positioned inside the dishwasher 10, and an electric fan 13 suitable to feed an air-steam mixture 14 along said duct 11.
  • the duct 11 comprises an inlet 11i and an outlet 11u directly connected to the tank 12, while the electric fan comprises a fan 30 positioned within the duct 11, substantially at the outlet 11u or along said duct 11, and a driving motor 31 suitable to rotate the fan 30 so as to draw the mixture 14 from the tank 12 and to make said mixture advance in a feed direction D along said duct 11.
  • the device 1 further comprises a water tank 16, which is suitable to be filled with a certain amount of water at the beginning of the drying process, and which is provided with a heat exchange wall 15 positioned inside the duct 11, and maintained at a temperature lower than the dew point temperature of the air by said water.
  • the heat exchange between the mixture 14, which circulates inside the duct 11, and the wall 15 causes the condensing of at least a portion of the steam of said mixture 14.
  • the size of said tank 16 is a function of the amount of steam which needs to be condensed; in fact, since the device 1 is a closed device, i.e. a device which does not have any outside emissions, said device works by using the water thermal capacity in order to accumulate the steam condensing energy.
  • the wall 15 has a sufficiently reduced thickness, while the corresponding exchange surface 15s which faces the inside of the duct 11 has an elevated exchange area.
  • the surface 15s has a bellows-like shape, but it can have any other shape and it can be realised with any kind of material.
  • the tank 16 can contain other materials as, for instance, waxes, paraffin, some phosphate salts, PCM ( Phase Change Material ), which allow to accumulate heat through physical changes or through endothermic chemical reactions.
  • PCM Phase Change Material
  • the device 1 comprises a feed opening 17 to feed cool water to the tank 16, and a discharge opening 19 to discharge the heated water from said tank 16; while the duct 11 is provided with a discharge outlet 18 for the condensate, which is collected by the gravity force from the surface 15s at said discharge outlet 18.
  • the discharge outlet 18 is connected alternatively to a small well (not shown) in the dishwasher 10, or directly to the tank 12, and, in this case, in order to avoid flooding the duct 11 with the washing water, the discharge outlet 18 is provided with a stop solenoid valve (not shown and of a known type), or with a float (not shown and of a known type) suitable to automatically close said discharge outlet 18.
  • the tank 16 could also be defined by a bag 20 hermetically sealed placed inside the duct 11 and which is not in contact with said duct 11 so as to have its outer surface 15s fully surrounded by the mixture 14.
  • the air-steam mixture at the outlet 11u of the condensing duct 11 has a lower steam content with respect to the inlet conditions into said duct 11.
  • the position of the electric fan 13 used to circulate the air is also important, in fact, by placing the electric fan 13 at the outlet 11u of the condensing duct 11, it is possible to maintain the pressure inside said duct 11 at a value lower than the value of the environment pressure because of the normal pressure drops inside the ducts: this fact further enhances the condensing since the pressure value influences the saturation temperature. Further, by placing also the motor 31 inside the duct 11 and by making the air, before it goes back into the tank 12 of the dishwasher 10, get in touch and cool said motor 31, a partial heating of the air itself is obtained with a consequent further decrease of the relative humidity. The power dissipated by the motor 31 is therefore used to further enhance the drying process.
  • the electric fan 13 can be placed at any point of the duct 11, according to the production needs, without, for this reason, significantly jeopardising the just described advantages with respect to the positioning of said electric fan 13 at the outlet 11u.
  • Figures 4, 5 and 6 show a preferred embodiment of the device 1, wherein, for reasons of overall dimensions, the duct 11 is mounted laterally and below the tank 12, and the electric fan 13 is placed inside the duct 11 and directly below the tank 12.
  • the inlet 11i is provided with a vertical siphon 51, while the outlet 11u is provided with a corresponding vertical siphon 52, which is positioned on the same plane of the siphon 51 and the mixture 14 passes vertically through said siphon 52 to reduce its speed and to enhance the heat exchange with the wall 15, which defines a rear wall both for the siphon 51 and for the siphon 52.
  • At least the fan 30 of the electric fan 31 is enclosed in a fluid tight box 53, which defines an intermediate portion of the duct 11, and it is positioned below the tank 12, and it comprises an elbow shaped inlet 53i connected to the siphon 52 in order to fully insulate said electric fan 13 from the tank 12.
  • Said box comprises two side appendices, wherein the appendix 54 defines an elbow shaped inlet duct for the siphon 51, while the appendix 55 has an inlet duct 56 and an outlet duct 57 of the water from the tank 16.
  • the siphon 51 is substantially U-shaped and has its concave portion facing downward
  • the siphon 52 has substantially an upside-down L shape and extends from the outlet 53u until it reaches the outlet 11u, and it is provided with a plurality of inner bent tiles 58 suitable to obstruct the free flow of the mixture 14.
  • the fan 30 is a fan which has an axial inlet flow and a radial outlet flow in order to feed both the outlet 53u and the appendix 54 so as to enhance the circulation of the mixture 14 along the duct 11.

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  • Washing And Drying Of Tableware (AREA)
EP99115218A 1998-08-06 1999-08-02 Vorrichtung zum Geschirrtrocknen am Ende des Waschverfahrens einer Geschirrspülmaschine Withdrawn EP0978250A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1998TO000686A IT1303213B1 (it) 1998-08-06 1998-08-06 Dispositivo per l'asciugatura delle stoviglie al termine del processodi lavaggio di una lavastoviglie
ITTO980686 1998-08-06

Publications (2)

Publication Number Publication Date
EP0978250A2 true EP0978250A2 (de) 2000-02-09
EP0978250A3 EP0978250A3 (de) 2000-11-22

Family

ID=11416981

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99115218A Withdrawn EP0978250A3 (de) 1998-08-06 1999-08-02 Vorrichtung zum Geschirrtrocknen am Ende des Waschverfahrens einer Geschirrspülmaschine

Country Status (2)

Country Link
EP (1) EP0978250A3 (de)
IT (1) IT1303213B1 (de)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2805729A1 (fr) * 2000-03-03 2001-09-07 Aeg Hausgeraete Gmbh Lave-vaisselle comportant un dispositif de condensation
EP1055389A3 (de) * 1999-05-26 2002-05-08 Miele & Cie. GmbH & Co. Programmgesteuerte Geschirrspülmaschine mit einer Einrichtung zum Trocknen von Geschirr
DE10013415B4 (de) * 2000-03-03 2004-12-02 AEG Hausgeräte GmbH Geschirrspülmaschine mit einer Kondensationsvorrichtung
DE10346304A1 (de) * 2003-10-06 2005-04-28 Bsh Bosch Siemens Hausgeraete Geschirrspüler mit Trocknungseinrichtung
EP1825800A3 (de) * 2006-02-22 2008-05-14 V-Zug AG Geschirrspüler mit Mitteln zum Abziehen von Feuchte aus dem Bottich
WO2008098745A2 (de) * 2007-02-13 2008-08-21 Meiko Maschinenbau Gmbh & Co. Kg Frontlader-geschirrspülmaschine mit wärmerückgewinnung
DE102007008826A1 (de) 2007-02-22 2008-08-28 Premark Feg L.L.C., Wilmington Gewerbliche Geschirrspülmaschine und Verfahren zu ihrem Betrieb
DE102007008827A1 (de) 2007-02-22 2008-08-28 Premark Feg L.L.C., Wilmington Gewerbliche Geschirrspülmaschine
WO2009074416A1 (de) * 2007-12-11 2009-06-18 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zur trocknungszeitregelung in geschirrspülmaschinen
WO2010010166A1 (de) * 2008-07-25 2010-01-28 BSH Bosch und Siemens Hausgeräte GmbH Spülverfahren für eine geschirrspülmaschine
US7901518B2 (en) 2005-05-20 2011-03-08 Premark Feg L.L.C. Commercial dishwasher with air deflector arrangement
ITTO20110985A1 (it) * 2011-10-28 2013-04-29 Bitron Spa Dispositivo di asciugatura per lavastoviglie
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.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1519571A (fr) * 1966-10-05 1968-04-05 Séchoir ménager pour la vaisselle, le linge et autres, à marche et arrêt automatique
GB2139083A (en) * 1983-05-06 1984-11-07 Bosch Siemens Hausgeraete Waste heat utilisation in the operation of a dishwashing machine
DE3741652A1 (de) * 1987-12-09 1989-06-22 Bauknecht Hausgeraete Einrichtung zum trocknen von geschirr
EP0753282A1 (de) * 1995-07-14 1997-01-15 TECNOPLASTICA PREALPINA S.p.A. Vorrichtung zum Kühlen und Kondensieren des von einem Geschirrspülmaschinebehälter oder dergleichen erzeugten Dampfes
DE19622882A1 (de) * 1996-06-07 1997-12-11 Aeg Hausgeraete Gmbh Geschirrspülmaschine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1519571A (fr) * 1966-10-05 1968-04-05 Séchoir ménager pour la vaisselle, le linge et autres, à marche et arrêt automatique
GB2139083A (en) * 1983-05-06 1984-11-07 Bosch Siemens Hausgeraete Waste heat utilisation in the operation of a dishwashing machine
DE3741652A1 (de) * 1987-12-09 1989-06-22 Bauknecht Hausgeraete Einrichtung zum trocknen von geschirr
EP0753282A1 (de) * 1995-07-14 1997-01-15 TECNOPLASTICA PREALPINA S.p.A. Vorrichtung zum Kühlen und Kondensieren des von einem Geschirrspülmaschinebehälter oder dergleichen erzeugten Dampfes
DE19622882A1 (de) * 1996-06-07 1997-12-11 Aeg Hausgeraete Gmbh Geschirrspülmaschine

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1055389A3 (de) * 1999-05-26 2002-05-08 Miele & Cie. GmbH & Co. Programmgesteuerte Geschirrspülmaschine mit einer Einrichtung zum Trocknen von Geschirr
DE10013415B4 (de) * 2000-03-03 2004-12-02 AEG Hausgeräte GmbH Geschirrspülmaschine mit einer Kondensationsvorrichtung
FR2805729A1 (fr) * 2000-03-03 2001-09-07 Aeg Hausgeraete Gmbh Lave-vaisselle comportant un dispositif de condensation
DE10346304A1 (de) * 2003-10-06 2005-04-28 Bsh Bosch Siemens Hausgeraete Geschirrspüler mit Trocknungseinrichtung
US8887742B2 (en) 2003-10-06 2014-11-18 Bsh Bosch Und Siemens Hausgaraete Gmbh Dishwasher comprising a drying apparatus
US7901518B2 (en) 2005-05-20 2011-03-08 Premark Feg L.L.C. Commercial dishwasher with air deflector arrangement
EP1825800A3 (de) * 2006-02-22 2008-05-14 V-Zug AG Geschirrspüler mit Mitteln zum Abziehen von Feuchte aus dem Bottich
WO2008098745A2 (de) * 2007-02-13 2008-08-21 Meiko Maschinenbau Gmbh & Co. Kg Frontlader-geschirrspülmaschine mit wärmerückgewinnung
WO2008098745A3 (de) * 2007-02-13 2009-01-22 Meiko Maschinenbau Gmbh & Co Frontlader-geschirrspülmaschine mit wärmerückgewinnung
CN101248975B (zh) * 2007-02-22 2011-02-16 浦瑞玛柯Feg有限责任公司 商用餐具洗涤机
DE102007008826A1 (de) 2007-02-22 2008-08-28 Premark Feg L.L.C., Wilmington Gewerbliche Geschirrspülmaschine und Verfahren zu ihrem Betrieb
DE102007008827A1 (de) 2007-02-22 2008-08-28 Premark Feg L.L.C., Wilmington Gewerbliche Geschirrspülmaschine
US7875122B2 (en) 2007-02-22 2011-01-25 Premark Feg L.L.C. Industrial dishwasher and method of operating the same
EP2289389A1 (de) * 2007-12-11 2011-03-02 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zur Trocknungserkennung in Geschirrspülmaschinen
US20100236575A1 (en) * 2007-12-11 2010-09-23 Bsh Bosch Und Siemens Hausgerate Gmbh Method for the drying time control in dishwashers
CN101896113B (zh) * 2007-12-11 2013-04-10 Bsh博世和西门子家用器具有限公司 洗碗机的干燥时间控制方法
WO2009074416A1 (de) * 2007-12-11 2009-06-18 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zur trocknungszeitregelung in geschirrspülmaschinen
WO2010010166A1 (de) * 2008-07-25 2010-01-28 BSH Bosch und Siemens Hausgeräte GmbH Spülverfahren für eine geschirrspülmaschine
US9364133B2 (en) 2008-07-25 2016-06-14 BSH Hausgeräte GmbH Washing method for a dishwashing machine
ITTO20110985A1 (it) * 2011-10-28 2013-04-29 Bitron Spa Dispositivo di asciugatura per lavastoviglie
EP2586357A1 (de) * 2011-10-28 2013-05-01 Bitron S.p.A. Trocknungssystem für eine Geschirrspülmaschine
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.

Also Published As

Publication number Publication date
EP0978250A3 (de) 2000-11-22
IT1303213B1 (it) 2000-11-02
ITTO980686A0 (it) 1998-08-06
ITTO980686A1 (it) 2000-02-06

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