EP3260033B1 - Lave-vaisselle à lavage et/ou rinçage assisté par air - Google Patents

Lave-vaisselle à lavage et/ou rinçage assisté par air Download PDF

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Publication number
EP3260033B1
EP3260033B1 EP17175850.1A EP17175850A EP3260033B1 EP 3260033 B1 EP3260033 B1 EP 3260033B1 EP 17175850 A EP17175850 A EP 17175850A EP 3260033 B1 EP3260033 B1 EP 3260033B1
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EP
European Patent Office
Prior art keywords
compressed air
wares
rinse
spray
wash
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.)
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Application number
EP17175850.1A
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German (de)
English (en)
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EP3260033A1 (fr
Inventor
Alexander R. Anim-Mensah
Michael T. Watson
Thomas J. ASHWORTH
Mary E. Paulus
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Illinois Tool Works Inc
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Illinois Tool Works Inc
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Publication of EP3260033A1 publication Critical patent/EP3260033A1/fr
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    • 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
    • A47L15/26—Washing or rinsing machines for crockery or tableware with movement of the crockery baskets by other means
    • A47L15/28—Washing or rinsing machines for crockery or tableware with movement of the crockery baskets by other means by lowering and lifting only
    • 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
    • A47L15/0021—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
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0047—Energy or water consumption, e.g. by saving 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
    • A47L15/0076—Washing or rinsing machines for crockery or tableware of non-domestic use type, e.g. commercial dishwashers for bars, hotels, restaurants, canteens or hospitals
    • 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
    • A47L15/0076—Washing or rinsing machines for crockery or tableware of non-domestic use type, e.g. commercial dishwashers for bars, hotels, restaurants, canteens or hospitals
    • A47L15/0078—Washing or rinsing machines for crockery or tableware of non-domestic use type, e.g. commercial dishwashers for bars, hotels, restaurants, canteens or hospitals with a plurality of fluid recirculation arrangements, e.g. with separated washing liquid and rinsing liquid recirculation circuits
    • 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
    • A47L15/02—Washing or rinsing machines for crockery or tableware with circulation and agitation of the cleaning liquid in the cleaning chamber containing a stationary basket
    • A47L15/10—Washing or rinsing machines for crockery or tableware with circulation and agitation of the cleaning liquid in the cleaning chamber containing a stationary basket by introducing compressed air or other gas into the liquid
    • 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
    • A47L15/4278—Nozzles
    • 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
    • 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
    • A47L15/24—Washing or rinsing machines for crockery or tableware with movement of the crockery baskets by conveyors
    • A47L15/241—Washing or rinsing machines for crockery or tableware with movement of the crockery baskets by conveyors the dishes moving in a horizontal plane
    • 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
    • A47L2301/00—Manual input in controlling methods of washing or rinsing machines for crockery or tableware, i.e. information entered by a user
    • A47L2301/04—Operation mode, e.g. delicate washing, economy washing, reduced time, sterilizing, water softener regenerating, odor eliminating or service
    • 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
    • A47L2401/04—Crockery or tableware details, e.g. material, quantity, condition
    • 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
    • A47L2401/18—Air temperature
    • 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
    • A47L2401/19—Air humidity
    • 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
    • A47L2501/11—Air heaters
    • 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
    • A47L2601/00—Washing methods characterised by the use of a particular treatment
    • A47L2601/03—Pressurised, gaseous medium, also used for delivering of cleaning liquid

Definitions

  • This application relates generally to warewashers such as those used in commercial applications such as cafeterias and restaurants and, more particularly, to a warewash machine for cleaning wares as defined in the preamble of claim 1 and to a method of cleaning wares as defined in claim 9.
  • a warewash machine as defined in the preamble of claim 1 is known from JP S63 97132 A . Further warewashers are described in GB 2 345 840 A , DE 43 23 816 A1 , DE 197 50 265 A1 and EP 3 210 518 A1 .
  • warewashers commonly include a housing which defines one or more internal washing and rinsing zones for dishes, pots pans and other wares.
  • wares are moved through multiple different spray zones within the housing for cleaning (e.g., pre-wash, wash, post-wash (aka power rinse) and a rinse zone or zones).
  • One or more of the zones include a tank in which liquid to be sprayed on wares is heated in order to achieve desired cleaning.
  • wares are typically manually moved into a generally stationary location within a chamber for cleaning, and then manually removed from the machine upon completion of all operations/steps of the cleaning cycle.
  • Reduced water consumption is becoming more important in certain areas in view of the growing demands for water as well as an increase in the number of drought stricken areas.
  • a warewash machine for cleaning wares includes a chamber for receiving wares, the chamber having at least one spray zone.
  • a rinse system associated with the spray zone includes one or more spray nozzles and a feed system connected to the spray nozzles.
  • the feed system includes both a rinse liquid line and a compressed air line. The feed system is operable to feed a combination of the rinse liquid and the compressed air to the spray nozzles during at least part of a rinsing operation carried during a ware cleaning cycle.
  • the chamber includes a wash tank below the spray zone, and a mechanism from moving wares from the spray zone down into the wash tank for a washing operation and back up to the spray zone for a rinsing operation.
  • the wash tank holds wash liquid in which the wares are submerged during the washing operation, and the compressed air line is selectively connectable to delivered compressed air into the wash liquid during at least part of the washing operation.
  • a ratio of rinse liquid flow to compressed air flow that is fed to the spray nozzles is variable by adjustment of one or more flow control devices.
  • the feed system includes a first flow control device for selectively controlling flow of rinse liquid from the rinse liquid line to the spray nozzles and a second flow control device for selectively controlling flow of compressed air from the compressed air line to the spray nozzles.
  • a controller is operatively connected to control both the first flow control device and the second flow control device. The controller is configured to control the first flow control device and the second flow control device so as to feed a combination of the rinse liquid and the compressed air to the spray nozzles during at least part of a rinsing operation of a ware cleaning cycle.
  • the first flow control device comprises a first valve and the second flow control device comprises a second valve.
  • the controller is configured to control the first flow control device and the second flow control device to feed only compressed air to the spray nozzles during a ware drying step of the ware cleaning cycle.
  • the controller is configured to control the first flow control device and the second flow control device to feed only rinse liquid to the spray nozzles during at least part of the rinsing operation.
  • the chamber includes a wash tank and an associated recirculation system for recirculating wash liquid from the wash tank for spraying the wash liquid in the spray zone onto wares during a washing operation.
  • the compressed air line is selectively connectable to the recirculation system for delivering a combined spray of wash liquid and compressed air onto the wares during the washing operation.
  • the compressed air line is selectively connectable to one or more rinse spray nozzles of the warewash machine such that a combined spray of rinse liquid and compressed air is delivered to the rinse spray nozzles during at least part of a rinsing operation of a ware cleaning cycle.
  • a method for cleaning wares in a warewash machine that includes a chamber for receiving wares, the chamber having at least one spray zone and a rinse system. The method involves lowering wares from the spray zone into a wash tank below the spray zone to submerge the wares within wash liquid of the wash tank and delivering compressed air into the wash tank during at least part of a washing operation of a ware cleaning cycle, and thereafter raising the wares back up into the spray zone for a rinsing operation; and delivering both compressed air and rinse liquid to a plurality of rinse spray nozzles of the rinse system of the warewash machine and spraying a combination of the compressed air and the rinse liquid from the rinse spray nozzles onto the wares during at least part of a rinsing operation of a ware cleaning cycle.
  • the method comprises delivering both compressed air and rinse liquid to a plurality of wash spray nozzles of the warewash machine and spraying a combination of the compressed air and the wash liquid from the rinse spray nozzle onto the wares during at least part of a washing operation of a ware cleaning cycle, wherein the wash liquid is recirculated from a wash tank below the spray zone.
  • an exemplary warewash machine 10 is shown, with a housing 12 and an internal chamber 14 with a spray zone 20 that can receive a rack 16 (or racks) of soiled wares 18 for cleaning (e.g., through an access opening closeable by a door or hood or, in some cases, through an access opening without a door).
  • the machine includes a wash tank 22 below the spray zone.
  • a mechanism 24 for lowering wares from the spray zone 20 down into the wash tank 22, and raising the wares from the wash tank 22 back up into the spray zone 20 is shown schematically.
  • the mechanism 24 could be a lift platform (e.g., open wire frame type) that is raised or lowered by way of a motor and belt or chain drive, or by way of one or more linear actuators.
  • other mechanism configurations are possible.
  • the spray zone 20 includes one or more rinse arms 26 (stationary and/or moving depending upon machine type) with associated spray nozzles 28 for spraying rinse liquid onto wares when the wares are up in the spray zone 20.
  • a feed system 30 feeds to the spray arms 26 and includes a rinse liquid line 32 and a compressed air line 34, each of which is connected, or selectively connectable, by a respective valve 36 and 38 to the rinse arm input path 40.
  • the rinse liquid could, for example, come from a hot water booster and may or may not include a rinse agent.
  • the compressed air could come from an external source as a standalone unit, from the facility utility or from a compressor installed on the machine.
  • the compressed air line 34 is also connected, or selectively connectable, to the wash tank 22 by a valve 42 and feed path 44, where the feed path 44 includes multiple inputs to the wash tank 22.
  • a controller 50 is operatively connected to each of the valves 36, 38, 42, the mechanism 24, an air sensor 46 (e.g., temperature and/or humidity and/or other air quality characteristics) and an air heater 48 (e.g., an electric heater).
  • controller is intended to broadly encompass any circuit (e.g., solid state, application specific integrated circuit (ASIC), an electronic circuit, a combinational logic circuit, a field programmable gate array (FPGA)), processor(s) (e.g., shared, dedicated, or group - including hardware or software that executes code), software, firmware and/or other components, or a combination of some or all of the above, that carries out the control functions of the machine or the control functions of any component thereof.
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • the wash tank 22 is filled with the required volume of wash liquid (e.g., water with detergent either predosed or dosed at the beginning of a cleaning cycle).
  • the valves 36, 38 and 42 are all closed at this time.
  • the machine 10 receives rack(s) in the upper position in the spray zone per dashed line form of rack 16, and a door of machine is closed at step 64 to activate a switch/sensor to initiate cleaning.
  • a user interface button could be manually pressed to initiate cleaning.
  • the rack transport/shift mechanism 24 then operates to submerge the rack(s) into the wash tank water per solid line form of rack 16'.
  • the controller 50 initiates the wash operation of the cleaning cycle at step 68, which includes opening valve 42 to deliver compressed air from line 34 into the washing liquid for washing for a predetermined time (while valves 36 and 38 remain closed).
  • the compressed air may be introduced directly into the volume of water in which the wares are submerged as suggested, and may be introduced during the entire washing operation of the cleaning cycle or during only part of the washing operation. The introduction of the compressed air aids in cleaning by creating turbulent conditions in the washing tank.
  • the rack transport/shift mechanism 24 moves the rack back into the upper position in the spray zone 20 per step 72 for rinsing (e.g., via sprays from nozzles 28 in the one or more rinse arms 26).
  • valve 42 is closed and valves 38 and 36 are opened to deliver a combined rinse water and compressed air mixture that is directed onto the wares through the spray nozzles 28, such as a combined flow through the same nozzle(s) 28 for rinsing for a predetermined time (e.g., which predetermined time can be set or varied).
  • the compressed air may be introduced during the entire rinsing operation of the cleaning cycle or during only part of the rinsing operation.
  • valve 42 remains closed and valve 36 is also closed such that compressed air is delivered into the ware chamber (without any water) through the spray nozzles 28 for a drying operation (e.g., for a predetermined time for a time as determined by a sensor that detects how dry the wares are) per step 78.
  • the heater 48 may be activated or otherwise controlled during the drying period based on air temperature and air quality factors/conditions such as humidity, moisture, etc. as indicated by the sensor(s) 46.
  • the flowrate or amount of compressed air for drying may be controlled or set based upon, for example, the type of ware, shape, weight, etc.
  • valves 36, 38 and 42 can be regulated/controlled (e.g., by the controller 50) to achieve various compressed air flows F1 and F2 and various rinse water flows F3 to achieve different water-to-air ratios and flows (e.g., F1 only for the wash, F3/F2 for rinsing and F2 for drying, where the level of each of F1, F2 and F3 can be controlled) as necessary for desired wash, rinse and drying of the various wares types, such as heavy or light duty loads.
  • controller 50 regulated/controlled (e.g., by the controller 50) to achieve various compressed air flows F1 and F2 and various rinse water flows F3 to achieve different water-to-air ratios and flows (e.g., F1 only for the wash, F3/F2 for rinsing and F2 for drying, where the level of each of F1, F2 and F3 can be controlled) as necessary for desired wash, rinse and drying of the various wares types, such as heavy or light duty loads.
  • compressed air line 34 is connected through a valve 102 to the rinse input path 40, which can also form part of the wash liquid path as shown.
  • valve 102 can also form part of the wash liquid path as shown.
  • separate wash arms 104 with wash nozzles 106 may also be provided, in which case an additional valve 108 may be provided so that separate compressed air flows to the wash path and the rinse path are possible.
  • the wash tank 22 includes a recirculation system with pump 110, line 112 and valve 114 which can feed to the spray nozzles 28 in one embodiment, or could feed to the spray nozzles 106 in an embodiment with separate wash arm(s) 104.
  • the machine may be a rack-type machine or may be a conveyor-type with a conveyance mechanism for moving wares through various spray zones of the machine.
  • a controller 150 is operatively connected to each of the valves 36, 102, 108, 114, and the pump 110, air sensor(s) 46 and heater 48.
  • the wash tank 22' is filled with the required volume of water with detergent either predosed or dosed at the beginning of washing.
  • the valves 36, 102, 108 and 114 are all closed at this time, and the pump 110 is off.
  • the machine 10 receives rack(s) in the chamber, and a door of machine is closed at step 164 to activate a switch/sensor to initiate cleaning.
  • a user interface button could be manually pressed to initiate cleaning per step 166.
  • valve 114 is opened and the pump 110 is then operated to circulate the wash fluid from the tank 22' up to the spray arms/nozzles 26/28 or 104/106 of the spray zone 20, while valves 36 and 102 (and if applicable 108) are closed.
  • valve 102 (or 108 if applicable) could also be opened during washing operation, or part of the washing operation, to deliver a combination of compressed air and washing liquid through the spray nozzles during the washing operation.
  • valves 102 and 36 are opened for the rinse operation.
  • the open state of valves 102 and 36 allow a water and compressed air mixture to be delivered onto the wares (e.g., combined flow through the same nozzle(s) for rinsing for a predetermined time (e.g., which predetermined time can be set or varied).
  • the compressed air may be introduced during the entire rinsing operation of the cleaning cycle or during only part of the rinsing operation.
  • valve 36 is closed and valve 102 remains open so that compressed air (without any water) for drying is directed onto the wares for a drying operation of the cleaning cycle (e.g., for a predetermined time for a time as determined by a sensor that detects how dry the wares are) per step 176.
  • the heater 48 may be activated or otherwise controlled during the drying period based on air temperature and air quality factors/conditions such as humidity, moisture, etc. as indicated by the sensor(s) 46.
  • the flowrate or amount of compressed air for drying may be controlled or set based upon, for example, the type of ware, shape, weight, etc.
  • valves 36, 114, 102 can be regulated/controlled (e.g., by the controller 150) to achieve various compressed air flows F5 and/or F5', various wash liquid flows F4 and various rinse water flows F6 to achieve different water-to-air ratios and flows as necessary for desired wash, rinse and drying of the various wares types, such as heavy or light duty loads.

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  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Claims (10)

  1. Lave-vaisselle (10) pour nettoyer de la vaisselle (18), comprenant :
    une chambre (14) pour recevoir de la vaisselle (18), la chambre (14) ayant au moins une zone de pulvérisation (20) ;
    un circuit de rinçage associé à la zone de pulvérisation (20) et comportant une ou plusieurs buses de pulvérisation (28, 106) et un circuit d'alimentation (30) connecté aux buses de pulvérisation (28, 106), le circuit d'alimentation (30) comportant une ligne de liquide de rinçage (32) et une ligne d'air comprimé (34),
    le circuit d'alimentation (30) étant fonctionnel pour alimenter les buses de pulvérisation (28, 106) avec une combinaison du liquide de rinçage et de l'air comprimé pendant au moins une partie d'une opération de rinçage effectuée pendant un cycle de nettoyage de vaisselle,
    le lave-vaisselle étant caractérisé en ce que :
    la chambre (14) inclut un réservoir de lavage (22) sous la zone de pulvérisation (20) et un mécanisme (24) pour déplacer la vaisselle (18) depuis la zone de pulvérisation (20) vers le bas dans le réservoir de lavage (22) pour une opération de lavage et de nouveau vers le haut vers la zone de pulvérisation (20) pour une opération de rinçage,
    le réservoir de lavage (22) contenant un liquide de lavage dans lequel la vaisselle (18) est immergée pendant l'opération de lavage, et la ligne d'air comprimé (34) pouvant être connectée de manière sélective pour fournir de l'air comprimé dans le liquide de lavage pendant au moins une partie de l'opération de lavage.
  2. Lave-vaisselle (10) selon la revendication 1,
    dans lequel un rapport entre le débit de liquide de rinçage et le débit d'air comprimé qui alimente les buses de pulvérisation (28, 106) est variable par réglage d'un ou plusieurs dispositifs de régulation de débit.
  3. Lave-vaisselle (10) selon l'une quelconque des revendications précédentes,
    dans lequel le circuit d'alimentation (30) comporte un premier dispositif de régulation de débit pour réguler de manière sélective un débit de liquide de rinçage de la ligne de liquide de rinçage (32) aux buses de pulvérisation (28, 106) et un second dispositif de régulation de débit pour réguler de manière sélective un débit d'air comprimé de la ligne d'air comprimé (34) aux buses de pulvérisation (28, 106), et un contrôleur (50, 150) connecté de manière fonctionnelle pour contrôler le premier dispositif de régulation et le second dispositif de régulation, le contrôleur (50, 150) étant configuré pour contrôler le premier dispositif de régulation et le second dispositif de régulation de manière à alimenter les buses de pulvérisation (28, 106) avec une combinaison du liquide de rinçage et de l'air comprimé pendant au moins une partie d'une opération de rinçage d'un cycle de nettoyage de vaisselle.
  4. Lave-vaisselle (10) selon la revendication 3,
    dans lequel le premier dispositif de régulation de débit comprend une première valve (36, 114) et le second dispositif de régulation de débit comprend une seconde valve (38, 42, 102, 108).
  5. Lave-vaisselle (10) selon la revendication 3 ou 4,
    dans lequel le contrôleur (50, 150) est configuré pour contrôler le premier dispositif de régulation de débit et le second dispositif de régulation de débit pour alimenter uniquement les buses de pulvérisation (28, 106) en air comprimé pendant une étape de séchage de vaisselle du cycle de nettoyage de vaisselle.
  6. Lave-vaisselle (10) selon l'une des revendications 3 à 5,
    dans lequel le contrôleur (50, 150) est configuré pour contrôler le premier dispositif de régulation de débit et le second dispositif de régulation de débit pour alimenter uniquement les buses de pulvérisation (28, 106) en liquide de rinçage pendant au moins une partie de l'opération de rinçage.
  7. Lave-vaisselle (10) selon l'une quelconque des revendications précédentes,
    dans lequel la chambre (14) comporte le réservoir de lavage (22) et un circuit de recirculation associé pour faire recirculer le liquide de lavage depuis le réservoir de lavage (22) pour pulvériser le liquide de lavage dans la zone de pulvérisation (20) sur la vaisselle (18) pendant une opération de lavage, la ligne d'air comprimé (34) pouvant être connectée de manière sélective au circuit de recirculation pour fournir une pulvérisation combinée de liquide de lavage et d'air comprimé sur la vaisselle (18) pendant l'opération de lavage.
  8. Lave-vaisselle (10) selon l'une quelconque des revendications précédentes,
    dans lequel la ligne d'air comprimé (34) peut être connectée de manière sélective à une ou plusieurs buses de pulvérisation de rinçage (28, 106) du lave-vaisselle (10) de sorte qu'une pulvérisation combinée de liquide de rinçage et d'air comprimé soit fournie aux buses de pulvérisation de rinçage (28, 106) pendant au moins une partie d'une opération de rinçage d'un cycle de nettoyage de vaisselle.
  9. Procédé de nettoyage de vaisselle (18) dans un lave-vaisselle (10) qui comporte une chambre (14) pour recevoir de la vaisselle (18), la chambre (14) ayant au moins une zone de pulvérisation (20), et un circuit de rinçage, le procédé comprenant les étapes consistant à :
    (i) abaisser la vaisselle (18) depuis la zone de pulvérisation (20) dans un réservoir de lavage (22) sous la zone de pulvérisation (20) pour immerger la vaisselle (18) dans un liquide de lavage du réservoir de lavage (22) et fournir de l'air comprimé dans le réservoir de lavage (22) pendant au moins une partie d'une opération de lavage d'un cycle de nettoyage de vaisselle, puis élever (18) de nouveau la vaisselle vers le haut dans la zone de pulvérisation (20) pour une opération de rinçage ; et
    (ii) fournir de l'air comprimé et du liquide de rinçage à une pluralité de buses de pulvérisation de rinçage (28, 106) du circuit de rinçage du lave-vaisselle (10) et pulvériser une combinaison de l'air comprimé et du liquide de rinçage depuis les buses de pulvérisation de rinçage (28, 106) sur la vaisselle (18) pendant au moins une partie d'une opération de rinçage d'un cycle de nettoyage de vaisselle.
  10. Procédé selon la revendication 9,
    comprenant l'étape consistant à fournir de l'air comprimé et du liquide de rinçage à une pluralité de buses de pulvérisation de lavage (28, 106) du lave-vaisselle (10) et pulvériser une combinaison de l'air comprimé et du liquide de lavage depuis la buse de pulvérisation de rinçage sur la vaisselle (18) pendant au moins une partie d'une opération de lavage d'un cycle de nettoyage de vaisselle, le liquide de lavage étant mis en recirculation depuis un réservoir de lavage (22) sous la zone de pulvérisation (20).
EP17175850.1A 2016-06-23 2017-06-13 Lave-vaisselle à lavage et/ou rinçage assisté par air Active EP3260033B1 (fr)

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US201662353808P 2016-06-23 2016-06-23
US15/597,873 US20170367557A1 (en) 2016-06-23 2017-05-17 Warewasher with air assisted washing and/or rinsing

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EP3260033A1 (fr) 2017-12-27
US20170367557A1 (en) 2017-12-28
US20200170479A1 (en) 2020-06-04

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