EP2604165B1 - Lave-vaisselle automatique - Google Patents

Lave-vaisselle automatique Download PDF

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Publication number
EP2604165B1
EP2604165B1 EP11401663.7A EP11401663A EP2604165B1 EP 2604165 B1 EP2604165 B1 EP 2604165B1 EP 11401663 A EP11401663 A EP 11401663A EP 2604165 B1 EP2604165 B1 EP 2604165B1
Authority
EP
European Patent Office
Prior art keywords
steam condenser
drying fan
volume flow
drying
automatic dishwasher
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
EP11401663.7A
Other languages
German (de)
English (en)
Other versions
EP2604165A1 (fr
Inventor
Erik Berends
David Buhl
Markus Drücker
Volker Henrich
Ludger Leifeld
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.)
Miele und Cie KG
Original Assignee
Miele und Cie KG
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 Miele und Cie KG filed Critical Miele und Cie KG
Priority to EP11401663.7A priority Critical patent/EP2604165B1/fr
Publication of EP2604165A1 publication Critical patent/EP2604165A1/fr
Application granted granted Critical
Publication of EP2604165B1 publication Critical patent/EP2604165B1/fr
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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
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0021—Regulation of operational steps within the washing processes, e.g. optimisation or improvement of operational steps depending from the detergent nature or from the condition of the crockery
    • A47L15/0034—Drying phases, including dripping-off phases
    • 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
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/17—Air pressure
    • 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
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/12—Air blowers
    • 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
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/20—Spray nozzles or spray arms
    • 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
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/36—Other output

Definitions

  • the invention relates to a dishwasher with a rinsing container, a steam condenser and a drying fan, the rinsing container providing a rinsing space with which the steam condenser and the drying fan are in fluid communication, wherein the drying fan has two switching stages and the steam condenser has a Sprühwasserdüse.
  • the invention further relates to a method for operating a dishwasher equipped with a steam condenser and a drying fan.
  • Dishwashers of the type mentioned are known from the prior art, even in the embodiment as Chipdalemaschinen.
  • the final rinse step of a wash program often ends with a high rinse bath temperature of, for example, 93 ° C.
  • a high rinse bath temperature of, for example, 93 ° C.
  • the high rinsing liquor temperature in the last rinsing step it is necessary if the high rinsing liquor temperature in the last rinsing step to first remove the steam located in the dishwasher dishwasher washing compartment and to condense.
  • a steam condenser is used, which is in fluid communication with the washing compartment provided by the washing compartment.
  • the steam condenser has a spray water nozzle.
  • a negative pressure in the steam condenser is generated by the Sprühwasserdüse, as a result of which comes due to the fluidic connection of the steam condenser with the washing compartment provided by the washing compartment to a suction of the steam located in the washing chamber in the steam condenser.
  • a condensation of the steam is generated by the Sprühwasserdüse, as a result of which comes due to the fluidic connection of the steam condenser with the washing compartment provided by the washing compartment to a suction of the steam located in the washing chamber in the steam condenser.
  • a dishwasher according to the preamble of claim 1 is made US 2004261820 A1 known.
  • the object of the invention to further develop a dishwasher of the type mentioned in that a faster vapor extraction is achieved.
  • the inventive design makes it possible not to use the drying fan in contrast to the prior art after the steam extraction, but rather to use the drying fan already for the purpose of vapor extraction. As a result, a much faster vapor extraction can be achieved, which on the one hand brings with it the advantage of an overall shortened program sequence and, on the other hand, a reduced water consumption with regard to operation of the spray nozzle.
  • the drying fan By the drying fan, an overpressure is formed during operation.
  • the output in the case of operation of the spray nozzle of the steam condenser water volume flow is adjusted to the volume delivered by the drying fan flow, in such a way that a vacuum is formed in the washing compartment.
  • the excess pressure generated by the volume flow of the drying blower is thus smaller than the negative pressure generated by the operation of the spray nozzle.
  • the formation of the negative pressure in the washing compartment thereby provides the advantage that steam located in the washing compartment can not be visibly exposed to the outside via any leaks, such as, for example, the door seal for the user. Rather, due to the pressure conditions formed, the vapor remains completely in the washing compartment and can be transferred into the steam condenser in the manner described above for the purpose of condensation.
  • the drying fan has several switching stages. There are preferably provided two switching stages, but also a plurality of such switching stages are possible.
  • the first switching stage corresponds for example to a volume flow of 7 to 10 m 3 / h.
  • the second switching stage a volume flow of about 75 m 3 / h is achieved.
  • the first operation of the drying blower in a first switching stage for example, 7 to 10 m 3 / h.
  • a first switching stage for example, 7 to 10 m 3 / h.
  • the volume flow generated by the drying fan is guided through the steam condenser, even if complete condensation of the steam has already occurred in the previous step of steam removal. Since the steam condenser is not designed to be optimized for the mere passage of drying air, it comes to significant pressure losses in the steam condenser. The pressure losses are greater with increasing volume flow. To remedy this situation, it is proposed according to a further feature of the invention that the steam condenser and the washing compartment provided by the washing compartment are in fluid communication via a bypass. During the drying phase, a part of the volume flow delivered by the drying fan can be guided via this bypass.
  • the bypass closes according to a further feature of the invention preferably pressure-dependent, preferably depending on the pressure difference between the steam condenser and washing.
  • the bypass opens at a pressure difference between the steam condenser and the rinse tank of about 5 to 6 mbar, that is opens when the pressure in the steam condenser is about 5 to 6 mbar above the pressure in the washing.
  • the steam condenser has a second spray water nozzle. It is preferred that the first and second Sprühigandüse are aligned with respect to the flow direction of the guided through the steam condenser volume flow opposite to each other. In this way, an optimized cooling and thus condensation of the guided through the steam condenser steam can be achieved.
  • the second spray nozzle which is aligned in the counterflow direction to the first Sprühigandüse, to be dimensioned in their water volume flow such that a vacuum in the steam condenser is still ensured in combination of the two Sprühwasserdüsen.
  • a method for operating a dishwasher equipped with a steam condenser and a drying blower during a drying phase in which the drying blower is switched on at the beginning of the drying phase and in a first switching stage with a delivered volume flow of 7 to 10 m 3 / h is operated, in which at the same time a Sprühwasserdüse the steam condenser is charged with a flow of water volume, which is tuned to the flow rate of the drying fan, so that in the washing compartment of the dishwasher a negative pressure is formed.
  • the drying fan is already switched on at the beginning of the drying phase for the purpose of supporting the steam condensation.
  • the drying fan is operated at the beginning of the drying phase only with a relatively low volume flow of 7 to 10 m 3 / h. It is insofar a kind of "gentle exhaust" of the drying blower.
  • the drying fan can be switched over to a higher switching stage, which according to the invention is operated with an increased flow rate in the flow rate. For example, a volume flow of 75 m 3 / h may be provided.
  • a negative pressure is set in the washing compartment, for example a negative pressure of -0.1 mbar in relation to the normal pressure. It is thus ensured that the vapor still present in the automatic dishwasher during the start-up phase can not visibly penetrate to the outside due to any leaks to the user.
  • a bypass between the steam condenser and a washing container providing the washing compartment is opened or closed depending on the pressure. This achieves a reduction of the counter pressure occurring in the steam condenser during full-load operation of the drying fan, which yields the advantages already described above.
  • FIG. 1 can be seen in a schematic representation of a dishwasher 12.
  • the automatic dishwashing machine 12 has a washing container 13, which provides a washing compartment 14.
  • the washing compartment 14 serves to receive items to be cleaned.
  • the dishwasher 12 further has a side cabinet 11.
  • This side cabinet 11 receives a drying fan 10. Via a channel 9 is the drying fan 10 with the washing compartment 13 provided by the washing compartment 14 in fluid communication. In this case, the volume flow conveyed by the drying fan 10 flows in the direction of the arrow 18 and passes via the inlet opening 8 into the washing compartment 14.
  • the dishwasher 12 also has a steam condenser 1.
  • the steam condenser 1 is also in fluid communication with the washing compartment 14 of the washing compartment 13, the steam condenser 1 having an inlet opening 4 and an outlet opening 3. In this case, via the inlet opening 4, a volumetric flow originating from the washing compartment 14 into the steam condenser 1.
  • the steam condenser 1 is flowed through, wherein the volume flow passed through the steam condenser 1 passes through the labyrinth guide 16 provided by the steam condenser 1. After flowing through the steam condenser 1, the volume flow passed through the steam condenser 1 returns via the outlet opening 3 back into the washing compartment 14.
  • the steam condenser 1 has a first spray water nozzle 2 and a second spray water nozzle 15. In the flow direction in correspondence of the arrow 17, the spray water nozzles 2 and 15 are aligned opposite each other.
  • the first spray water nozzle 2 discharges the water volume flow conveyed by it in the direction of flow of the volume flow flowing through the steam condenser 1.
  • the second Sprühwasserdüse 15 is, however, aligned in countercurrent to the flow direction of the steam condenser 1 flowing through the flow rate.
  • the spray nozzles 2 and 15 of the steam condenser 1 are operated with different water flow rates.
  • the water volume flow of the first spray nozzle 2 is significantly higher than the water volume flow of the second spray nozzle 15, for example by a factor of 3 to 4.
  • the first spray nozzle 2 causes due to their orientation in the direction of the flow path of a volume flow passed through the steam condenser 1, a negative pressure in the washing compartment 14. Due to its reverse orientation causes the second spray nozzle 15, however, a positive pressure education.
  • the drying fan 10 already starts. As a result, a faster discharge of the steam from the washing compartment 14 can be effected. As a result of an operation of the drying blower 10 but it comes to a positive pressure training, which should be avoided so that can not accidentally penetrate any leaks of steam to the outside. For this reason, it is provided that the volume flow delivered by the drying fan 10 is matched to the water volume flow of the spray water nozzles 2 and 15 such that a negative pressure is formed in the washing chamber 14 as a result.
  • the volume flow delivered by the drying fan 10 is subject to overpressure in the Flushing of about 2/3 of the amount of negative pressure of the steam condenser 1 corresponds.
  • a negative pressure in the washing compartment 14 remains in total. If, for example, in the embodiment shown by the two spray nozzles 2 and 15 in total a negative pressure of - 0.3 mbar compared to normal, so is for the drying fan 10 such a flow rate permissible in the washing chamber 14 to an overpressure of 0.2 mbar would lead to normal.
  • a total pressure of -0.1 mbar compared to normal in the washing compartment 14 sets. This is sufficient that no steam escapes unintentionally via the door seal.
  • the steam is carried away from the washing chamber 14 much faster than in the case of pure suction operation of the steam condenser 1.
  • a controlled system is built up with the aid of a pressure sensor.
  • the pressure sensor is mounted in the washing compartment 14 and measures the Spülrauminnentik.
  • the volume flow of the drying fan 10 is increased until a setpoint value is set at the pressure sensor. This pressure value is kept constant by the control system. This ensures that the maximum possible volume flow is always conveyed by the drying fan 10 and there is always a negative pressure in the washing compartment 14.
  • FIG. 2 An optional embodiment of the steam condenser 1 is in FIG. 2 shown.
  • FIG. 2 can be seen in a schematic representation of a steam condenser 1, which is essentially after that FIG. 1 equivalent.
  • the in FIG. 2 shown steam condenser 1 has, in contrast to the above-described steam condenser 1, however, only one spray nozzle. 2
  • the steam condenser 1 has after FIG. 2 via a bypass 19, which is formed opposite to the outlet opening 7 for condensed water.
  • the bypass 19 serves to pass a volume flow introduced via the inlet opening 4 into the steam condenser 1, that is to say a return of the volume flow back into the washing compartment 14 omitting the labyrinth guide 16 of the steam condenser 1.
  • the bypass 19 provides an opening. This opening can be closed by means of a bypass flap 6.
  • This bypass flap 6 is held by tension springs 5, which cause a closure of the opening by the bypass flap 6 in the normal state.
  • the tension springs 5 are designed such that upon reaching a certain overpressure in the steam condenser 1 opening of the bypass valve 6 takes place, so that an overflow of a recessed into the steam condenser 1 via the inlet 4 volumetric flow through the opening can take place directly back into the washing compartment 14 , As a consequence, the flow path is shortened in this way, and it can lead to a reduction of the overpressure in the steam condenser 1, until such a pressure reduction has occurred, that causes an automatic pressure-dependent closing of the opening of the bypass 19 through the bypass valve 6 by the tension springs 5 he follows.
  • the drying air conveyed by the drying fan 10 is completely passed through the steam condenser 1.
  • the embodiment according to the invention makes it possible to open the bypass 19 during operation of the drying fan 10, as a result of which pressure losses are greatly reduced since it is no longer necessary for the drying air to flow through the complete flow path of the steam condenser 1.
  • the opening of the bypass 19 is ideally located very close to the inlet opening 4 for the steam condenser. 1
  • the bypass opening opens either due to the increasing internal pressure during operation of the drying fan 10 or by an actuator not shown in the figures, which is controlled by the control of the dishwasher 12.

Landscapes

  • Washing And Drying Of Tableware (AREA)

Claims (15)

  1. Lave-vaisselle automatique avec une cuve de lavage (13), un condenseur de vapeur (1) et un ventilateur de séchage (10), la cuve de lavage (13) réalisant un espace de lavage (14) avec lequel le condenseur de vapeur (1) et le ventilateur de séchage (10) sont en communication d'écoulement, le condenseur de vapeur (1) disposant d'une buse d'eau de pulvérisation (2),
    caractérisé en ce que
    le ventilateur de séchage (10) présente deux niveaux de commutation, et en ce que le flux volumique d'eau délivré, en fonctionnement, par la buse d'eau de pulvérisation (2) du condenseur de vapeur (1) est adapté au flux volumique transporté par le ventilateur de séchage (10) selon un premier niveau de commutation, de telle sorte qu'une dépression est constituée dans l'espace de lavage (14).
  2. Lave-vaisselle automatique selon la revendication 1,
    caractérisé en ce que
    le condenseur de vapeur (1) présente une deuxième buse d'eau de pulvérisation (15).
  3. Lave-vaisselle automatique selon la revendication 2,
    caractérisé en ce que
    la première et la deuxième buse d'eau de pulvérisation (2, 15) sont orientées en vis-à-vis par rapport au sens d'écoulement (17) du flux volumique conduit par le condenseur de vapeur (1).
  4. Lave-vaisselle automatique selon une des revendications précédentes,
    caractérisé en ce que
    le ventilateur de séchage (10) présente une multiplicité de niveaux de commutation.
  5. Lave-vaisselle automatique selon la revendication 4,
    caractérisé en ce que
    les niveaux de commutation du ventilateur de séchage (10) se fondent les uns dans les autres.
  6. Lave-vaisselle automatique selon une des revendications précédentes,
    caractérisé en ce
    qu'un premier niveau de commutation du ventilateur de séchage (10) correspond à un flux volumique de 7 à 10 m3/h.
  7. Lave-vaisselle automatique selon une des revendications précédentes,
    caractérisé en ce
    qu'un deuxième niveau de commutation du ventilateur de séchage correspond à un flux volumique d'environ 75 m3/h.
  8. Lave-vaisselle automatique selon une des revendications précédentes,
    caractérisé en ce que
    le condenseur de vapeur (1) et l'espace de lavage (14) réalisé par la cuve de lavage (13) sont en communication d'écoulement par le biais d'une dérivation (19).
  9. Lave-vaisselle automatique selon la revendication 8,
    caractérisé en ce que
    la dérivation (19) peut être fermée en fonction de la pression, de préférence en fonction de la différence de pression entre le condenseur de vapeur (1) et la cuve de lavage (13).
  10. Procédé de fonctionnement d'un lave-vaisselle automatique (12) équipé d'un condenseur de vapeur (1) et d'un ventilateur de séchage (10) pendant une phase de séchage, dans lequel le ventilateur de séchage (10) est mis en marche au début de la phase de séchage et fonctionne dans un premier niveau de commutation avec un flux volumique transporté de 7 à 10 m3/h, dans lequel, simultanément, une buse d'eau de pulvérisation (2) du condenseur de vapeur (1) est alimentée avec un flux volumique d'eau qui est adapté au flux volumique du ventilateur de séchage (10), de telle sorte qu'une dépression est constituée dans l'espace de lavage (14) du lave-vaisselle automatique (12).
  11. Procédé selon la revendication 10, dans lequel, à l'issue d'une phase de démarrage, le ventilateur de séchage (10) fonctionne avec un flux volumique dont le débit est augmenté.
  12. Procédé selon la revendication 11, dans lequel le ventilateur de séchage (10) fonctionne avec un flux volumique transporté de 75 m3/h.
  13. Procédé selon une des revendications précédentes 10 à 12, dans lequel, pendant la phase de démarrage, une dépression de -0,1 mbar par rapport à la pression normale est réglée dans l'espace de lavage (14).
  14. Procédé selon une des revendications précédentes 10 à 13, dans lequel un deuxième flux volumique d'eau est délivré au moyen d'une deuxième buse d'eau de pulvérisation (15) du condenseur de vapeur (1).
  15. Procédé selon une des revendications précédentes 10 à 14, dans lequel une dérivation entre le condenseur de vapeur (1) et une cuve de lavage (13) réalisant l'espace de lavage (14) est ouverte ou fermée en fonction de la pression.
EP11401663.7A 2011-12-13 2011-12-13 Lave-vaisselle automatique Active EP2604165B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11401663.7A EP2604165B1 (fr) 2011-12-13 2011-12-13 Lave-vaisselle automatique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11401663.7A EP2604165B1 (fr) 2011-12-13 2011-12-13 Lave-vaisselle automatique

Publications (2)

Publication Number Publication Date
EP2604165A1 EP2604165A1 (fr) 2013-06-19
EP2604165B1 true EP2604165B1 (fr) 2013-12-04

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013110008A1 (de) * 2013-09-12 2015-03-12 Miele & Cie. Kg Spülautomat, insbesondere Reinigungs- und/oder Desinfektionsautomat für gewerbliche Zwecke
CN105982631A (zh) * 2015-02-04 2016-10-05 青岛海尔洗碗机有限公司 一种洗碗机冷凝干燥系统及冷凝干燥方法、洗碗机
KR101712913B1 (ko) 2015-08-03 2017-03-07 엘지전자 주식회사 식기세척기 및 식기세척기의 제어방법
EP3335613A1 (fr) * 2016-12-19 2018-06-20 Bonferraro S.p.A. Dispositif pour la condensation de vapeur dans une circulation d'air d'un lave-vaisselle industriel ou semblable
DE102020213871A1 (de) 2020-11-04 2022-05-05 BSH Hausgeräte GmbH Haushalts-Geschirrspülmaschine und Verfahren

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3026628A (en) * 1956-08-07 1962-03-27 Whirlpool Co Drying system for dishwashers
DE19522307C2 (de) * 1995-06-20 2000-06-08 Bsh Bosch Siemens Hausgeraete Zum Trocknen eingerichtete Wasch- oder Geschirrspülmaschine
US20040261820A1 (en) * 2003-06-30 2004-12-30 Monsrud Lee J. Dishwashing machine having a water vapor recovery line and method for washing articles
KR20100113730A (ko) * 2009-04-14 2010-10-22 엘지전자 주식회사 식기세척기

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