EP0752232A1 - Durch natürliche Lüftung Trocknungsvorrichtung einer Geschirspülmaschine - Google Patents

Durch natürliche Lüftung Trocknungsvorrichtung einer Geschirspülmaschine Download PDF

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Publication number
EP0752232A1
EP0752232A1 EP96110731A EP96110731A EP0752232A1 EP 0752232 A1 EP0752232 A1 EP 0752232A1 EP 96110731 A EP96110731 A EP 96110731A EP 96110731 A EP96110731 A EP 96110731A EP 0752232 A1 EP0752232 A1 EP 0752232A1
Authority
EP
European Patent Office
Prior art keywords
chamber
dishwashing machine
mouth
air
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.)
Granted
Application number
EP96110731A
Other languages
English (en)
French (fr)
Other versions
EP0752232B1 (de
Inventor
Giuseppe Marchitto
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 EMEA SpA
Original Assignee
Merloni Elettrodomestici 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 Merloni Elettrodomestici SpA filed Critical Merloni Elettrodomestici SpA
Publication of EP0752232A1 publication Critical patent/EP0752232A1/de
Application granted granted Critical
Publication of EP0752232B1 publication Critical patent/EP0752232B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • A47L15/488—Connections of the tub with the ambient air, e.g. air intake or venting arrangements
    • 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 dishwashing machine having a drying system, as specified in the preamble of the first claim.
  • the elimination of the steam from the chamber and the dampness from the dishes is obtained by leaving such dishes in the machine, for a given length of time, during which the steam is substantially eliminated due to a "condensing effect" carried out by the walls of the chamber, and also allowing that a minimum amount of the steam penetrates a multifunction device where it can condense.
  • a dedicated fan is provided, able to cause a circulation of the air within the washing chamber, in such a way so as to realise a final forced drying phase of the dishes and pans.
  • Such system which allows for obtaining better drying results compared to the more traditional technique, does however have the drawback of requiring expensive components, such as the dedicated fan and the relative control circuit; a further drawback of the mentioned solution is that constituted by a certain bulk of the fan, which results in being difficult to house within the slight space available within the cabinet or door of the dishwashing machine.
  • the aim of the present invention is that of overcoming the aforementioned drawbacks, by way of indicating a dishwashing machine equipped with a drying circuit that is of effective functionality, of simple realisation, compact and of contained costs.
  • the reference number 1 indicates as a whole the structure of the chamber of the dishwashing machine subject of the invention; 2 indicates the actual washing chamber, the walls of which are realised in stainless steel; the frontal face of such chamber 2 is delimited by a door, indicated with 3, which is constituted by an outer shell of painted steel plate and by an inner shell or counter-door, in stainless steel, which faces the interior of the chamber 2.
  • the device 4 carries out known functions, such as the dosage of the regenerating water or the anti-backflow of water to the water mains, that shall not therefore be described in detail herein (note for example Italian patent N° IT-B-1.238.419).
  • the device 4 however, used with the aims of the present invention does have some peculiarities.
  • the device 4 has within its upper section a mouth 5, in communication with the interior of the washing chamber 2.
  • a similar opening is to be found in the lower section of the body of the multifunction device and therefore, in substance, about half way up of the overall height of the chamber.
  • the mouth 5 which can be appropriately shielded with known techniques, is to be found considerably moved towards the top of the washing chamber.
  • figures 2 and 3 respectively illustrate a multifunction device according to the known art and a multifunction device according to the present invention; in figure 2, for simplicity sake, the same reference numbers of figure 3 are used, for indicating similar elements, with the addition of the letter A.
  • the device according to the known art 4A of figure 2 has a hollow body, equipped with a breather type opening 5A directed towards the interior of the chamber of the machine; such opening has the main function of avoiding the creation of over-pressureldepression within the chamber.
  • the device 4A further has two outlets, one being in its upper section, indicated with 7A; therefore, the steam in over-pressure is able to exit the washing chamber of the known machines, following a natural path, from bottom to top, from the opening 5A to the outlet 7A, following the path indicated by the arrows 8A.
  • the opening 5A does not have in itself the effect of allowing the circulation of air within the chamber; as already mentioned, in fact, in machines of the known type, not equipped with a circulation fan, the steam results in being practically stagnant within the washing chamber, in as that the opening 5A does not have a "draft" effect.
  • the mouth 5 is obtained in the upper part of the body of the device 4; an aperture is also provided towards the exterior 7, obtained in the lateral part of the body of the device 4, being lower if compared to the mouth 5.
  • a steam/air flow in order to transit within the body 4 has to necessarily follow an unnatural path, from the top towards the bottom; the flow entering the mouth 5 is in fact immediately deviated to 180°, to redescend, and then deviated once again to about 90°, to then exit from the lateral aperture 7, as indicated by the arrow 8 in figure 3.
  • 9 indicates a hollow body in a plastic material, provided for placing in further communication the external environment with the interior of the chamber 2; said body 9, visible in detail in figure 4, has a breathing mouth 10 of the air present in the interspace between the chamber 2 and the cabinet of the dishwashing machine, and an outlet mouth 11, communicating with the interior of the chamber 2; within the body 9, between the mouth 10 and the mouth 11, at least one deflector is provided 12, having the main purpose of avoiding unwanted water losses from the chamber 2.
  • the body 9 has a rounded form, with the aims of favouring a path of the air flow being the most natural possible, whilst compatible with the need of avoiding unwanted water losses from the chamber.
  • the mouth 11 is directed towards the interior of the chamber 2 in the lower part of the same, at a height being greater than the level that can be reached by the washing water; as is seen the mouth 11 is found in the illustrated case moved towards one of the corners of the chamber 2 defined by the door 3.
  • the electrical connection means may be constituted for instance by normal wires, while the control means can for instance be constituted by a classical programmer, or timer, of the dishwashing machine.
  • the lamp fitting 15 which in the illustrated case is arranged in the central area of the chamber 2, is equipped with suitable sealing means, provided for avoiding infiltrations of water or dampness, and the relative risks of short circuiting.
  • the present invention is based on the following considerations.
  • the neutral zone is found at a medium height between the two apertures and, still considering T is greater than T0, a current of air takes place from the exterior to the interior through the lower aperture and from the interior to the exterior through the upper aperture.
  • a "draft" is constituted for the shaft constituted by the mouth 5.
  • air is introduced to the chamber through the body 9 being of a temperature lower than that present in the chamber itself, full of steam; the latter, as is known, tends to occupy the higher most section of the chamber, therefore it would naturally tend to exit via the upper hole.
  • the position of the neutral zone can be modified respect the layout of the chamber, so as to optimise the capacity of the circulated air, acting on the resistances of the air flow generated by the two apertures; the neutral zone is to be found closer to the aperture that, generally, has the greatest dimensions and/or the less resistance.
  • two mouths are supplied 5 and 10, apt at placing the interior of the chamber 2 with the external environment; the structure of the two mouths 5 and 10 is realised in such a way that they supply appropriate resistance to the incoming and exiting flows, in a way which optimises the capacity of the circulated air.
  • the lower mouth 10 could be realised so as to have greater dimensions and/or less resistance to the incoming air if compared to the mouth 5.
  • the functioning of the dishwashing machine according to the present invention is the following.
  • the presence of the mouth 10 determines the entry within the chamber 2, in a natural way, of a flow of air present in the interspace of the cabinet of the machine; the hot air loaded with steam, originating from the wash, tends to raise upwards in the chamber 2.
  • the device 4 is, for this aim, shaped so as to determine a complicated passage for the air/steam mixture to be discharged from the chamber; such complicated passage is furthermore advantageously designed for favouring the condensation of the humidity present in the flow transiting in the device 4.
  • the dishwashing machine according to the invention results in being equipped with means apt at creating a natural flow of circulated air, such as to generate a thrust on the steam (which, as said, is practically stagnant in the known machines); such flow of air also generates a current of air, apt at realising the dehumidification of the dishes and of the chamber itself.
  • the drying of the dishes can be further improved, by way of a low cost and low powered energy source; in the case being illustrated in fig. 1, this is obtained by way of a light bulb 14, housed in the relative light fitting 15.
  • the programming device of the machine provides for the switching on of the light bulb 14 upon termination of the wash.
  • the switching on of the light bulb 14 has the function however of maintaining the inside of the washing chamber at a certain temperature, so as to improve, or delay, the gradual lowering of such, due to the continuous exiting of hot air.
  • the switching on of the light bulb 14 has the effect of maintaining re!atively higher over time the difference between the internal temperature of the chamber and the external temperature, in such a way as to further improve the efficiency of the drying phase.
  • the dishwashing machine according to the invention allows for obtaining the established aims; in particular, from tests carried out, it has been verified how the drying results of the dishes in accordance with the practically natural ventilation system according to the invention are absolutely satisfactory and better than those of the traditional solutions that do not foresee a forced drying; on the other hand the solution according to the invention is of substantially lower costs if compared to the known solutions that provide a dedicated drying fan.
  • the two mouths for the entrance and exiting of the air, do not have to be necessarily realised on two opposite walls of the washing chamber, as illustrated in figure 1.
  • the mouth 11 described above could be substituted with two breathing mouths, realised in the lower portion of the counter door of the machine.
  • the air entering the washing chamber reaches a lower temperature if compared with the case described with reference to figure 1, which, due to the reasons explained several times above, causes an advantage of the circulation capacity.
  • two lateral drainage drawings can be provided on the internal shell of the door 3, so as to generate a recirculation of water between the internal shell and the external shell, which cleans the mouths themselves thus freeing them from residues that may be dragged to their rear.

Landscapes

  • Washing And Drying Of Tableware (AREA)
EP96110731A 1995-07-06 1996-07-03 Durch natürliche Lüftung Trocknungsvorrichtung einer Geschirspülmaschine Expired - Lifetime EP0752232B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO950571 1995-07-06
IT95TO000571A IT1276477B1 (it) 1995-07-06 1995-07-06 Macchina lavastoviglie con sistema di asciugatore a ventilazione naturale

Publications (2)

Publication Number Publication Date
EP0752232A1 true EP0752232A1 (de) 1997-01-08
EP0752232B1 EP0752232B1 (de) 2001-10-24

Family

ID=11413707

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96110731A Expired - Lifetime EP0752232B1 (de) 1995-07-06 1996-07-03 Durch natürliche Lüftung Trocknungsvorrichtung einer Geschirspülmaschine

Country Status (4)

Country Link
EP (1) EP0752232B1 (de)
DE (1) DE69616171T2 (de)
ES (1) ES2164195T3 (de)
IT (1) IT1276477B1 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0876789A1 (de) * 1997-04-24 1998-11-11 Merloni Elettrodomestici S.p.A. Geschirrspülmaschine mit einer Flüssigkeitsdosierungsvorrichtung
WO1999012464A1 (en) * 1997-09-08 1999-03-18 Split Vision Development Ab A device at dish washers
DE10246187A1 (de) * 2002-10-02 2004-04-15 Aweco Appliance Systems Gmbh & Co. Kg Regeneriervorrichtung mit Beleuchtungseinrichtung
DE10256168A1 (de) * 2002-12-02 2004-06-09 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspülmaschine
CN100417363C (zh) * 2003-09-28 2008-09-10 乐金电子(天津)电器有限公司 洗碗机的蒸汽排出装置
WO2013042036A1 (en) 2011-09-20 2013-03-28 Indesit Company S.P.A. Dishwashing machine with drying system
WO2015107474A1 (en) 2014-01-17 2015-07-23 Indesit Company S.P.A. Household dishwashing machine
EP3020319A1 (de) 2014-11-13 2016-05-18 Indesit Company S.p.A. Haushaltsgeschirrspülmaschine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10257650A1 (de) * 2002-12-10 2004-06-24 BSH Bosch und Siemens Hausgeräte GmbH Heizvorrichtung zum Trocknen von Spülgut in einer Geschirrspülmaschine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE6600890U (de) * 1966-02-15 1969-02-27 Grundstuecksverwaltungsges Mue Geschirrspuelmaschine
FR2039346A1 (de) * 1969-04-22 1971-01-15 Whirlpool Co
FR2075918A7 (de) * 1970-01-03 1971-10-15 Zanussi A Spa Industrie
FR2491322A1 (fr) * 1980-10-08 1982-04-09 Bosch Siemens Hausgeraete Lave-vaisselle
CA2084688A1 (en) * 1991-12-13 1993-06-14 Ugo Favret Dishwasher ventilation by natural air flow

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE6600890U (de) * 1966-02-15 1969-02-27 Grundstuecksverwaltungsges Mue Geschirrspuelmaschine
FR2039346A1 (de) * 1969-04-22 1971-01-15 Whirlpool Co
FR2075918A7 (de) * 1970-01-03 1971-10-15 Zanussi A Spa Industrie
FR2491322A1 (fr) * 1980-10-08 1982-04-09 Bosch Siemens Hausgeraete Lave-vaisselle
CA2084688A1 (en) * 1991-12-13 1993-06-14 Ugo Favret Dishwasher ventilation by natural air flow

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0876789A1 (de) * 1997-04-24 1998-11-11 Merloni Elettrodomestici S.p.A. Geschirrspülmaschine mit einer Flüssigkeitsdosierungsvorrichtung
WO1999012464A1 (en) * 1997-09-08 1999-03-18 Split Vision Development Ab A device at dish washers
DE10246187A1 (de) * 2002-10-02 2004-04-15 Aweco Appliance Systems Gmbh & Co. Kg Regeneriervorrichtung mit Beleuchtungseinrichtung
DE10256168A1 (de) * 2002-12-02 2004-06-09 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspülmaschine
CN100417363C (zh) * 2003-09-28 2008-09-10 乐金电子(天津)电器有限公司 洗碗机的蒸汽排出装置
WO2013042036A1 (en) 2011-09-20 2013-03-28 Indesit Company S.P.A. Dishwashing machine with drying system
EP3000377A1 (de) 2011-09-20 2016-03-30 Indesit Company S.p.A. Geschirrspülmaschine mit einem trocknungssystem
WO2015107474A1 (en) 2014-01-17 2015-07-23 Indesit Company S.P.A. Household dishwashing machine
EP3998009A1 (de) 2014-01-17 2022-05-18 Whirlpool EMEA S.p.A. Haushaltgeschirrspülmaschine
EP3020319A1 (de) 2014-11-13 2016-05-18 Indesit Company S.p.A. Haushaltsgeschirrspülmaschine

Also Published As

Publication number Publication date
DE69616171D1 (de) 2001-11-29
EP0752232B1 (de) 2001-10-24
ES2164195T3 (es) 2002-02-16
ITTO950571A0 (it) 1995-07-06
DE69616171T2 (de) 2002-06-06
ITTO950571A1 (it) 1997-01-06
IT1276477B1 (it) 1997-10-31

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