WO2016095951A1 - Système hydraulique - Google Patents

Système hydraulique Download PDF

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Publication number
WO2016095951A1
WO2016095951A1 PCT/EP2014/077803 EP2014077803W WO2016095951A1 WO 2016095951 A1 WO2016095951 A1 WO 2016095951A1 EP 2014077803 W EP2014077803 W EP 2014077803W WO 2016095951 A1 WO2016095951 A1 WO 2016095951A1
Authority
WO
WIPO (PCT)
Prior art keywords
washing liquid
valve
storage tank
liquid storage
arrangement
Prior art date
Application number
PCT/EP2014/077803
Other languages
English (en)
Inventor
David Persson
Original Assignee
Electrolux Appliances Aktiebolag
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 Electrolux Appliances Aktiebolag filed Critical Electrolux Appliances Aktiebolag
Priority to PCT/EP2014/077803 priority Critical patent/WO2016095951A1/fr
Publication of WO2016095951A1 publication Critical patent/WO2016095951A1/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
    • A47L15/42—Details
    • A47L15/4291—Recovery arrangements, e.g. for the recovery of energy or water
    • 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
    • A47L15/0023—Water filling
    • 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
    • A47L2401/09—Water level
    • 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
    • A47L2401/20—Time, e.g. elapsed operating time
    • 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
    • A47L2501/01—Water supply, e.g. opening or closure of the water inlet valve
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

Definitions

  • the present disclosure relates to a hydraulic arrangement for a dishwasher.
  • the present disclosure also relates to a dishwasher comprising a hydraulic arrangement and method for filling and emptying a washing liquid storage tank for a dishwasher.
  • washing liquid storage tanks arranged to store washing liquid for subsequent use have been developed. Such washing liquid storage tanks can be arranged to store washing liquid for re-use in a later stage of a wash cycle or for re-use in a subsequent wash cycle. Filling and emptying of such a tank require hydraulic components such as a pump and valves to regulate an amount of washing liquid in such a tank.
  • the document US 201 1 132407 A1 relates to hydraulic arrangement for a dishwasher comprising a washing liquid storage tank arranged to store washing liquid in a dishwasher.
  • a washing liquid storage tank arranged to store washing liquid in a dishwasher.
  • a valve is arranged at a duct connected to a lower portion of the tank, where the valve is arranged to prevent washing liquid from being transferred out of the tank when it is to be stored.
  • Valves used for this purpose need to be powerful enough to close in liquids under various pressures that could contain various dirt particles. Also, they have to reliably remain closed for long durations of time when the appliance is not powered. Valves being powerful in opening and/or closing force are usually either slow in their opening and closing procedures, or require actuators which deliver a high amount of energy in a short time. If high controllability is also a requirement, such as short response time and high accuracy, components meeting these requirements may come at a high cost. In view of above, there is a need for a hydraulic arrangement for a dishwasher which overcomes at least some of the above mentioned drawbacks.
  • An object of the present invention is to provide an improved hydraulic arrangement for a dishwasher.
  • the object is achieved by a hydraulic arrangement for a dishwasher, the arrangement comprising a washing liquid storage tank arranged to store a washing liquid in the dishwasher, the arrangement comprising a duct connected to a lower portion of the washing liquid storage tank, the duct being arranged to transfer washing liquid into and out of the washing liquid storage tank, where the arrangement further comprises a first valve through which air is allowed to flow into and out of an upper portion of the washing liquid storage tank when the first valve is in an open state, where the washing liquid storage tank and the first valve forms an enclosure preventing air from flowing into and out of the upper portion of the washing liquid storage tank, and transfer of the washing liquid into and out of the washing liquid storage tank via the duct, when the first valve is in a closed state.
  • the enclosure prevents transfer of the washing liquid into and out of the washing liquid storage tank via the duct when the first valve is in the closed state, a simple and reliable regulation of the amount of the washing liquid stored in the washing liquid storage tank can be achieved.
  • the first valve since air is allowed to flow through the first valve into and out of an upper portion of the washing liquid storage tank, the first valve will only need to be arranged to open and close in air. Thus, performance requirements of the first valve are lower than for previous valves for regulating an amount of washing liquid in a washing liquid storage tank, mentioned above, since these are arranged to open and close in washing liquid. Thus, the first valve can be provided at a low cost. Further, since first valve will only need to be arranged to open and close in air, a first valve having a short opening and closing time can be provided, at a low cost, since the first valve does not need to be as strong in an opening and closing stroke, as a valve arranged to open and close in washing liquid.
  • a hydraulic arrangement for a dishwasher which also admits a fast regulation of the amount of washing liquid in the washing liquid storage tank. That is, the first valve allows instant control of the filling and emptying of the tank, and the volume of washing liquid transferred into and out of the washing liquid storage tank can be controlled in a more exact manner.
  • the hydraulic arrangement provided allows for novel control procedures of the amount of washing liquid in the washing liquid storage tank.
  • a dishwasher using hydraulic arrangement provided may, thanks to the novel control procedures allowed, use less energy during a wash session.
  • a dishwasher using a hydraulic arrangement provided may use less energy during a wash session since the first valve per se requires less energy in an opening/closing procedure than previous valves for regulating the amount of washing liquid in a washing liquid storage tank, since it will only need to be arranged to open and close in air.
  • the arrangement further comprises a control unit arranged to regulate an amount of the washing liquid stored in the washing liquid storage tank by controlling the first valve between the open state and the closed state.
  • the arrangement further comprises a second valve, the second valve being arranged at the duct, where washing liquid is allowed to flow through the duct when the second valve is an open state and where the washing liquid is prevented from flowing through the duct when the second valve is in a closed state, and where the control unit further is arranged to regulate the amount of the washing liquid stored in the washing liquid storage tank by controlling the second valve between the open state and the closed state.
  • a second valve By using a second valve, storage of washing liquid in the washing liquid storage tank can be ensured, especially when the washing liquid is to be stored for a long time.
  • the second valve comprises a wax motor.
  • a wax motor is a motor which can be provided at a low cost and has a high strength. Though, it is relatively slow in its opening and closing procedure.
  • a second valve comprising a wax motor with a first valve only being arranged to open and close in air
  • a fast regulation of the amount of washing liquid in the washing liquid storage tank can be provided simply by opening and closing the first valve and a reliable storage of washing liquid in the washing liquid storage tank can be achieved by closing the second valve.
  • a hydraulic arrangement is provided which achieves a fast and reliable regulation of the amount of washing liquid in the washing liquid storage tank.
  • the hydraulic arrangement can be provided at a low cost.
  • the first valve is biased towards the closed state. Since, the first valve is biased towards the closed state it will close when it is not requested to open. As a result, the first valve will close upon power supply loss. Thus, in such situations, washing liquid stored in the washing liquid storage tank will be prevented from being transferred out of the tank. As a result, washing liquid stored in the washing liquid storage tank may be prevented from flooding a kitchen environment upon a power supply failure.
  • the arrangement comprises a second valve comprising a wax motor
  • such a wax motor will have time to close the second valve, after a power supply failure, without the washing liquid stored in the washing liquid storage tank being transferred out of the tank.
  • control unit is arranged to reduce the amount of the washing liquid stored in the washing liquid storage tank by controlling the second valve towards the open state and after a predetermined time has elapsed, control the first valve towards the open state.
  • control the first valve towards the open state is controlled by controlling the first valve towards the open state.
  • the arrangement comprises a sump arranged to receive washing liquid being transferred from the washing liquid storage tank, where the sump comprises a sensor arranged to sense a volume of washing liquid in the sump, where the control unit is arranged to stop transferring of washing liquid from the washing liquid storage tank to the sump by closing the first valve, when a predetermined volume of washing liquid is sensed in the sump.
  • the control unit is arranged to stop transferring of washing liquid from the washing liquid storage tank to the sump by closing the first valve, when a predetermined volume of washing liquid is sensed in the sump.
  • the arrangement further comprises a washing liquid pump and where the control unit is further arranged to control operation of the washing liquid pump where the control unit is arranged to increase the amount of washing liquid stored in the washing liquid storage tank by controlling the second valve towards the open state and after a predetermined time has elapsed, control the first valve towards the open state and initiate operation of the washing liquid pump.
  • the control unit is arranged to increase the amount of washing liquid stored in the washing liquid storage tank by controlling the second valve towards the open state and after a predetermined time has elapsed, control the first valve towards the open state and initiate operation of the washing liquid pump.
  • a dishwasher comprising a hydraulic arrangement according to some embodiments. Since such a dishwasher comprises a hydraulic arrangement according to some embodiments, an improved dishwasher is provided. According to some aspects of the present disclosure, the object is achieved by a method for filling and emptying a washing liquid storage tank for a dishwasher using a hydraulic arrangement comprising a washing liquid storage tank, a duct and a first valve, where the duct is connected to a lower portion of the washing liquid storage tank, and the first valve is arranged to control flow of air into and out of an upper portion of the washing liquid storage tank, where the method comprises:
  • the arrangement further comprises a control unit, and the method may further comprise:
  • the arrangement further comprises a second valve, the second valve being arranged at the duct, where washing liquid is allowed to flow through the duct when the second valve is an open state and where the washing liquid is prevented from flowing through the duct when the second valve is in a closed state, and where the method may further comprise:
  • the method further comprises:
  • the arrangement further comprises a sump arranged to receive washing liquid being transferred from the washing liquid storage tank, where the sump comprises a sensor arranged to sense a volume of washing liquid in the sump, where the method further comprise: sensing a predetermined volume of washing liquid in the sump, using the sensor, and in response to such sensing,
  • the arrangement further comprises a washing liquid pump and where the control unit is further arranged to control operation of the washing liquid pump, where the method further comprises:
  • Fig. 1 illustrates a hydraulic arrangement for a dishwasher
  • Fig. 2 illustrates a method for filling and emptying a washing liquid storage tank for a dishwasher.
  • Fig. 1 illustrates a hydraulic arrangement 1 for a dishwasher 3.
  • the arrangement 1 comprises a washing liquid storage tank 5 arranged to store a washing liquid in the dishwasher 3.
  • the washing liquid storage tank 5 may be arranged to store washing liquid for re-use in a later stage of a wash cycle or for re-use in a subsequent wash cycle.
  • the washing liquid may comprise a mixture of water and dishwasher detergent.
  • the arrangement 1 comprises a duct 7 connected to a lower portion 5.1 of the washing liquid storage tank 5.
  • the duct 7 is arranged to transfer washing liquid into and out of the washing liquid storage tank 5.
  • the arrangement 1 further comprises a first valve 8 through which air is allowed to flow into and out of an upper portion 5.2 of the washing liquid storage tank 5 when the first valve 8 is in an open state.
  • the washing liquid storage tank 5 and the first valve 8 forms an enclosure preventing air from flowing into and out of the upper portion 5.2 of the washing liquid storage tank 5, and transfer of the washing liquid into and out of the washing liquid storage tank 5 via the duct 7, when the first valve 8 is in a closed state.
  • washing liquid When the first valve 8 is in the closed state, air is prevented from flowing into and out of an upper portion 5.2 of the washing liquid storage tank 5. As a result, washing liquid will also be prevented from flowing through the duct 7 into and out of the washing liquid storage tank 5 when the first valve 8 is in the closed state. This is due to an under- pressure, respective an over-pressure, in relation to the environment external to the washing liquid storage tank, resulting from small amounts of washing liquid being emptied out of, or filled to, the washing liquid storage tank 5. That is, if the first valve 8 is in the closed state, washing liquid will be prevented from being emptied from the washing liquid storage tank 5 since an under-pressure will occur after a small amount of washing liquid has been emptied.
  • washing liquid in the washing liquid storage tank 5 will remain in the washing liquid storage tank 5.
  • the first valve 8 is in the closed state, washing liquid will be prevented from being filled to the washing liquid storage tank 5 since an over-pressure will occur after a small amount of washing liquid has been filled to the washing liquid storage tank 5.
  • the first valve 8 is in the open state, air is allowed to flow into and out of the upper portion 5.2 of the washing liquid storage tank 5.
  • washing liquid will be allowed to be transferred through the duct 7 into and out of the washing liquid storage tank 5.
  • the arrangement 1 further comprises a control unit 9 arranged to regulate an amount of the washing liquid stored in the washing liquid storage tank 5 by controlling the first valve 8 between the open state and the closed state.
  • the arrangement 1 further comprises a control unit 9 arranged to regulate an amount of the washing liquid stored in the washing liquid storage tank 5 by controlling the first valve 8 between the open state and the closed state, a simple and reliable regulation of the amount of the washing liquid stored in the washing liquid storage tank 5 can be achieved
  • the arrangement 1 may further comprise a second valve 1 1 .
  • the second valve 1 1 is arranged at the duct 7 where washing liquid is allowed to flow through the duct 7 when the second valve 1 1 is an open state and where the washing liquid is prevented from flowing through the duct 7 when the second valve 1 1 is in a closed state.
  • the control unit 9 further is arranged to regulate the amount of the washing liquid stored in the washing liquid storage tank 5 by controlling the second valve 1 1 between the open state and the closed state.
  • the second valve 1 1 may comprise a wax motor.
  • a wax motor may comprise a heating unit arranged to heat a wax body where the phase-change characteristics of the wax body is arranged to displace a valve body towards an open position.
  • Such a wax motor can be provided at a low cost and is strong in its opening and closing stroke. However, it is relatively slow in its opening and closing procedure.
  • a second valve 1 1 comprising a wax motor and a first valve 8 of solenoid type, a fast regulation of the amount of washing liquid in the washing liquid storage tank 5 can be provided, while a low-priced and reliable solution for storing washing liquid in the washing liquid storage tank 5 can be achieved.
  • the first valve 8 may comprise a solenoid valve. The first valve 8 may be biased towards the closed state.
  • the first valve 8 may comprise a valve body 13 being biased, by the force of a spring 14 towards a closed position. In the closed state, air is prevented from flowing through the first valve 8 into and out the upper portion 5.2 of the washing liquid storage tank 5. Further, as illustrated in Fig. 1 , the first valve 8 may comprise one or more electromagnets 16 arranged to displace the valve body 13 from the closed position to an open position when being subjected to an electrical voltage by the control unit 9. Thereby, the first valve 8 can be transitioned between the closed state and open state in an easy, fast and reliable manner.
  • the first valve 8 comprises a valve body 13 being biased, by the force of a spring 14 towards a closed position, the valve body 13 will, by the force of the spring 14 be displaced from the open position to the closed position when the one or more electromagnets 16 not are being subjected to an electrical voltage. As a result, the first valve 8 will be closed in case of a power supply failure.
  • the first valve 8 may, in its open state, open a connection between the upper portion 5.2 of the washing liquid storage tank 5 and an aperture 20 in a washing compartment 22 of the dishwasher 3, via a duct 18. Thereby, in case the washing liquid storage tank 5 is overfilled with washing liquid, superfluous washing liquid will end up in a sump 15 of the dishwasher 3 and may thereby avoid flooding a kitchen environment in which the dishwasher 3 is positioned.
  • the control unit 9 may be arranged to reduce the amount of the washing liquid stored in the washing liquid storage tank 5 by controlling the second valve 1 1 towards the open state and after a predetermined time has elapsed, control the first valve 8 towards the open state. Thereby, the second valve 1 1 will have time to become fully open before the first valve 8 is opened. Thereby, a relative slow second valve 1 1 can be used while an exact regulation of the amount of washing liquid stored in the washing liquid storage tank 5 can be achieved by controlling the first valve 8 between the open state and the closed state.
  • the arrangement 1 illustrated in Fig. 1 comprises a sump 15 arranged to receive washing liquid being transferred from the washing liquid storage tank 5.
  • the sump 15 comprises a sensor 17 arranged to sense a volume of washing liquid in the sump 15.
  • the control unit 9 may be arranged to stop transferring of washing liquid from the washing liquid storage tank 5 to the sump 15 by closing the first valve 8, when a predetermined volume of washing liquid is sensed in the sump 15.
  • the control unit 9 may be arranged to stop transferring of washing liquid from the washing liquid storage tank 5 to the sump 15 by closing the first valve 8, when a second predetermined time has elapsed. Since a relatively fast first valve 8 can be utilized, a relatively exact volume of washing liquid can be transferred to the sump 15.
  • the arrangement 1 illustrated in Fig. 1 further comprises a washing liquid pump 19.
  • the control unit 9 may be further arranged to control operation of the washing liquid pump 19.
  • the control unit 9 may be arranged to increase the amount of washing liquid stored in the washing liquid storage tank 5 by controlling the second valve 1 1 towards the open state and after a predetermined time has elapsed, control the first valve 8 towards the open state and initiate operation of the washing liquid pump 19. Thereby, the second valve 1 1 will have time to become fully open before the first valve 8 is opened. In that way, a relative slow second valve 1 1 can be used while an exact regulation of the amount of washing liquid stored in the washing liquid storage tank 5 can be achieved by controlling the first valve 8 between the open state and the closed state while the washing liquid pump 19 is under operation.
  • Fig. 1 also illustrates a dishwasher 3 comprising a hydraulic arrangement 1 according to some embodiments.
  • Fig. 2 illustrates a method 100 for filling and emptying a washing liquid storage tank 5 for a dishwasher 3 using a hydraulic arrangement 1 comprising a washing liquid storage tank 5, a duct 7 and a first valve 8. Since such an arrangement 1 is shown in Fig. 1 , below reference is made to Fig. 1 as well as to Fig. 2.
  • the duct 7 is connected to a lower portion 5.1 of the washing liquid storage tank 5, and the first valve 8 is arranged to control flow of air into and out of an upper portion 5.2 of the washing liquid storage tank 5, where the method 100 comprises:
  • the arrangement 1 may further comprise a control unit 9, and the method 100 may further comprise:
  • the arrangement 1 may further comprise a second valve 1 1 , the second valve 1 1 being arranged at the duct 7, where washing liquid is allowed to flow through the duct 7 when the second valve 1 1 is an open state and where the washing liquid is prevented from flowing through the duct 7 when the second valve 1 1 is in a closed state
  • the method 100 may further comprise:
  • the method 100 may further comprise:
  • the arrangement 1 may further comprise a sump 15 arranged to receive washing liquid being transferred from the washing liquid storage tank 5, where the sump 15 comprises a sensor 17 arranged to sense a volume of washing liquid in the sump 15, and the method may further 100 comprise:
  • sensing 107 a predetermined volume of washing liquid in the sump 15, using the sensor 17, and in response to such sensing 107,
  • the arrangement 1 may further comprise a washing liquid pump 19 and the control unit 9 may further be arranged to control operation of the washing liquid pump 19, and the method may further 100 comprise:

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  • Washing And Drying Of Tableware (AREA)

Abstract

L'invention concerne un système hydraulique (1) pour un lave-vaisselle (3) comprenant un réservoir de liquide de lavage (5). Le système (1) comprend un conduit (7) relié à une partie inférieure (5.1) du réservoir de liquide de lavage (5). Le système (1) comprend en outre une première soupape (8) à travers laquelle l'air peut entrer et sortir d'une partie supérieure (5.2) du réservoir de liquide de lavage (5) lorsque la première soupape (8) est dans un état ouvert. Le réservoir de liquide de lavage (5) et la première soupape (8) forment une enceinte empêchant l'air d'entrer et de sortir de la partie supérieure (5.2) du réservoir de liquide de lavage (5) et empêchent le transfert du liquide de lavage vers et hors du réservoir de liquide de lavage (5) via le conduit (7), lorsque la première soupape (8) est dans un état fermé. La présente invention concerne également un lave-vaisselle (3) comprenant un système hydraulique (1) et un procédé (100) permettant de remplir et de vider un réservoir de liquide de lavage (5) pour un lave-vaisselle (3).
PCT/EP2014/077803 2014-12-15 2014-12-15 Système hydraulique WO2016095951A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2014/077803 WO2016095951A1 (fr) 2014-12-15 2014-12-15 Système hydraulique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2014/077803 WO2016095951A1 (fr) 2014-12-15 2014-12-15 Système hydraulique

Publications (1)

Publication Number Publication Date
WO2016095951A1 true WO2016095951A1 (fr) 2016-06-23

Family

ID=52134157

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/077803 WO2016095951A1 (fr) 2014-12-15 2014-12-15 Système hydraulique

Country Status (1)

Country Link
WO (1) WO2016095951A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007056918B3 (de) * 2007-11-27 2009-04-30 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zur Regelung eines Spülgangs in einem wasserführenden Haushaltsgerät
US20110132407A1 (en) 2008-07-23 2011-06-09 BSH Bosch und Siemens Hausgeräte GmbH Dishwasher having circulation circuits
WO2014097157A1 (fr) * 2012-12-21 2014-06-26 Bitron S.P.A. Circuit de récupération hydraulique permettant de récupérer le liquide de lavage d'un dispositif de lavage et/ou de séchage

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007056918B3 (de) * 2007-11-27 2009-04-30 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zur Regelung eines Spülgangs in einem wasserführenden Haushaltsgerät
US20110132407A1 (en) 2008-07-23 2011-06-09 BSH Bosch und Siemens Hausgeräte GmbH Dishwasher having circulation circuits
WO2014097157A1 (fr) * 2012-12-21 2014-06-26 Bitron S.P.A. Circuit de récupération hydraulique permettant de récupérer le liquide de lavage d'un dispositif de lavage et/ou de séchage

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