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EP4374764A1 - Lave-vaisselle et cycle de fonctionnement associé - Google Patents

Lave-vaisselle et cycle de fonctionnement associé Download PDF

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Publication number
EP4374764A1
EP4374764A1 EP22209147.2A EP22209147A EP4374764A1 EP 4374764 A1 EP4374764 A1 EP 4374764A1 EP 22209147 A EP22209147 A EP 22209147A EP 4374764 A1 EP4374764 A1 EP 4374764A1
Authority
EP
European Patent Office
Prior art keywords
water
duct
valve
bottom sump
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.)
Pending
Application number
EP22209147.2A
Other languages
German (de)
English (en)
Inventor
Andrea Ambrosi
Eros Pinaroli
Fulvio Rebecchi
Mauro Tosi
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.)
Bonferraro SpA
Original Assignee
Bonferraro 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 Bonferraro SpA filed Critical Bonferraro SpA
Priority to EP22209147.2A priority Critical patent/EP4374764A1/fr
Publication of EP4374764A1 publication Critical patent/EP4374764A1/fr
Pending 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
    • A47L15/0018—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
    • A47L15/0026—Rinsing 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
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0057—Cleaning of machines parts, e.g. removal of deposits like lime scale or proteins from piping or tub
    • 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
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4225—Arrangements or adaption of recirculation or discharge pumps
    • 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
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4219—Water recirculation
    • A47L15/4221—Arrangements for redirection of washing water, e.g. water diverters to selectively supply the 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
    • 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
    • A47L2401/34—Other automatic detections
    • 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
    • A47L2501/03—Water recirculation, e.g. control of distributing valves for redirection of water flow

Definitions

  • the present invention relates to dishwashers, both for domestic and professional use, and in particular to a dishwasher with an improved hydraulic circuit and a relevant operating cycle.
  • an intermediate rinse is traditionally carried out with cold water, to reduce energy consumption, in order to remove the residues of polluted water that remain after the drainage of the wash water.
  • the hydraulic circuit is cleaned in preparation for the final rinse, which must be carried out with water that is as clean as possible, but at the same time there is the disadvantage that the hydraulic circuit, the wash tank and the dishes are also cooled.
  • the dishwasher is forced to heat the final rinse water more, resulting in higher energy consumption.
  • the overall energy consumption would not change because the heating for the intermediate rinse would compensate for the reduction in heating for the final rinse.
  • it would be possible to dispense with the intermediate rinse but in that case the water for the final rinse would be polluted with not fully satisfactory washing results.
  • DE 102017129052A1 describes a dishwasher equipped with a mains water supply line controlled by a two-way valve with a first outlet leading to the bottom sump of the wash tank, as in conventional dishwashers, and a second outlet leading to the delivery duct of the wash pump.
  • water can be loaded by switching the valve to the second outlet while the wash pump is off and the drain pump is running.
  • the object of the present invention is therefore to provide a dishwasher which overcomes said drawbacks.
  • This object is achieved by means of a dishwasher provided with a recirculation duct extending between the delivery duct of the wash pump and the sump, said recirculation duct being provided with a shut-off valve.
  • Other advantageous features of the present dishwasher are specified in the dependent claims.
  • the main advantage of the dishwasher according to the present invention is that it is possible to carry out the intermediate rinse by limiting it to the most critical areas of the hydraulic circuit, without affecting the wash tank and the dishes, with a simpler and less bulky hydraulic circuit. This result in a reduction of the dishwasher cost both in terms of components and labor for its assembly, as well as greater designing freedom in choosing the arrangement of the components.
  • a further advantage of this dishwasher and its operating cycle derives from the fact that the intermediate rinse phase requires less water consumption because the drain pump is activated only at the end of this phase, so that the water loaded for this phase can be circulated several times for better cleaning of the affected portion of the hydraulic circuit.
  • a dishwasher traditionally comprises a load duct, controlled by a shut-off solenoid valve 1, for loading mains water from a tap to an air break 2, then passing through a softener 3 containing descaling resins, to be finally loaded into a sump 4 at the bottom of the wash tank through an inlet 5.
  • the water is then withdrawn for the wash/rinse phases, through an outlet 6, by a wash pump 7, preceded by a resistor 8 arranged on the suction duct 9.
  • the wash pump 7 sends the water to the sprayers 10, 11 through a delivery duct 12 and a diverter valve 18, which controls the inflow to the various sprayers via its three outlets (there is also a third sprayer, not shown, on the ceiling of the wash tank).
  • the machine further comprises a drain pump 13, for sending water from sump 4 to a drain duct 14.
  • the innovative aspect of this dishwasher consists in the possibility of choosing an alternative water delivery path thanks to a recirculation duct 15, provided with a shut-off valve 16, extending between the delivery duct 12 and an additional inlet 17 of sump 4.
  • a shut-off valve 16 extending between the delivery duct 12 and an additional inlet 17 of sump 4.
  • valve 16 In the phase of water loading into sump 4 through inlet 5 at the beginning of the operating cycle, followed by the wash phase, valve 16 is closed. After the wash phase, in the water loading phase for the intermediate rinse, valve 16 is opened and the three outlets of valve 18 are closed, so that the water goes from the delivery duct 12 to the recirculation duct 15.
  • the wash pump 7 thus circulates the water only in the bottom part of the hydraulic circuit of the dishwasher, along the delivery duct 12 and the recirculation duct 15 until it enters sump 4 through inlet 17, and then flows back towards the wash pump 7 through the suction duct 9 and resistor 8. Upon completion of the circuit cleaning, the water is discharged by the drain pump 13 through the drain duct 14, leaving the wash/rinse circuit clean and ready for the final rinse.
  • the duration of the intermediate rinse phase and the amount of water loaded for this phase can be freely chosen depending on the specific circuit cleaning requirements.
  • this phase could be divided into multiple sub-phases, that is, it could include multiple sequences of water loading, circuit cleaning, and water draining.
  • the dishwasher according to the present invention can perform the final rinse with less energy consumption, since the wash tank and the dishes have not been cooled by the cold water loaded in the previous phase. Moreover, the quantity of water required for washing the wash/rinse circuit, which is in any case the part of the hydraulic circuit with the greatest stagnation of polluted water, is significantly less than that required for a traditional intermediate rinse.
  • softener 3 and/or air break 2 could be absent, and that in the case of an industrial dishwasher, pump 7 and sprayers 10, 11 would only be intended for washing and there would be a further pump and two further sprayers specifically intended for rinsing, but the part of the circuit illustrated in the figures would not change.
  • valves 16 and 18, of ducts 9, 12, 14, 15 and of inlets 5 and 17, as well as of the possible softener 3 and/or air break 2 may be freely varied according to specific constructional requirements, as long as their relative arrangement within the hydraulic circuit illustrated above is maintained.

Landscapes

  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Washing And Drying Of Tableware (AREA)
EP22209147.2A 2022-11-23 2022-11-23 Lave-vaisselle et cycle de fonctionnement associé Pending EP4374764A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22209147.2A EP4374764A1 (fr) 2022-11-23 2022-11-23 Lave-vaisselle et cycle de fonctionnement associé

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22209147.2A EP4374764A1 (fr) 2022-11-23 2022-11-23 Lave-vaisselle et cycle de fonctionnement associé

Publications (1)

Publication Number Publication Date
EP4374764A1 true EP4374764A1 (fr) 2024-05-29

Family

ID=84785005

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22209147.2A Pending EP4374764A1 (fr) 2022-11-23 2022-11-23 Lave-vaisselle et cycle de fonctionnement associé

Country Status (1)

Country Link
EP (1) EP4374764A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110056527A1 (en) * 2007-12-14 2011-03-10 BSH Bosch und Siemens Hausgeräte GmbH Dishwasher
US20110132407A1 (en) * 2008-07-23 2011-06-09 BSH Bosch und Siemens Hausgeräte GmbH Dishwasher having circulation circuits
US20140060579A1 (en) * 2012-09-05 2014-03-06 Whirlpool Corporation Methods of reusing liquid in a dishwasher
EP2759244B1 (fr) 2013-01-29 2015-12-16 Miele & Cie. KG Lave-vaisselle et procédé d'alimentation en eau douce d'un lave-vaisselle
DE102017129052A1 (de) 2017-12-06 2019-06-06 Miele & Cie. Kg Geschirrspülmaschine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110056527A1 (en) * 2007-12-14 2011-03-10 BSH Bosch und Siemens Hausgeräte GmbH Dishwasher
US20110132407A1 (en) * 2008-07-23 2011-06-09 BSH Bosch und Siemens Hausgeräte GmbH Dishwasher having circulation circuits
US20140060579A1 (en) * 2012-09-05 2014-03-06 Whirlpool Corporation Methods of reusing liquid in a dishwasher
EP2759244B1 (fr) 2013-01-29 2015-12-16 Miele & Cie. KG Lave-vaisselle et procédé d'alimentation en eau douce d'un lave-vaisselle
DE102017129052A1 (de) 2017-12-06 2019-06-06 Miele & Cie. Kg Geschirrspülmaschine

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