EP3155949B1 - Wasserführendes haushaltsgerät - Google Patents

Wasserführendes haushaltsgerät Download PDF

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Publication number
EP3155949B1
EP3155949B1 EP16193461.7A EP16193461A EP3155949B1 EP 3155949 B1 EP3155949 B1 EP 3155949B1 EP 16193461 A EP16193461 A EP 16193461A EP 3155949 B1 EP3155949 B1 EP 3155949B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
water
supply line
water supply
channel
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
EP16193461.7A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3155949A1 (de
Inventor
Markus Behr
Holger Hoppe
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 PL16193461T priority Critical patent/PL3155949T3/pl
Publication of EP3155949A1 publication Critical patent/EP3155949A1/de
Application granted granted Critical
Publication of EP3155949B1 publication Critical patent/EP3155949B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/088—Liquid supply arrangements
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4278—Nozzles
    • A47L15/4282—Arrangements to change or modify spray pattern or direction

Definitions

  • the invention relates to a washing machine.
  • the washing machine has at least one nozzle and a water supply line.
  • the water supply line is designed to supply water to the at least one nozzle so that the water can exit from the at least one nozzle. If the at least one nozzle is an immovable nozzle, it can only radiate in the direction given by its geometry. If the water supply line is designed to supply water to a plurality of nozzles, the pressure at each individual nozzle is reduced. If the line pressure is low, the pressure may be too low, for example, to achieve a good flush with the water passed through the nozzle. Problems can therefore arise when rinsing with water from the nozzle or nozzles because the pressure is not sufficient and / or the direction of the water jet emerging from the nozzle cannot be changed.
  • EP 1 357 235 A1 , EP 1 486 158 A1 , DE 25 34 261 A1 and the US 2009/178695 A1 describe rotating spray systems with constant pressure conditions due to the movement of mechanical parts.
  • the DE 298 05 990 U1 relates to the integration of a hydrodynamic spray nozzle into a water inlet device.
  • the invention therefore poses the problem of providing a water-carrying household appliance in which the pressure on a nozzle can be increased in a simple manner and / or a direction of a water jet emerging from a nozzle can be changed.
  • a fluidic oscillator is arranged between the at least one nozzle and the water supply line.
  • the fluidic oscillator is a component that emits a self-oscillating jet when water flows through it, but does not require any moving parts.
  • the fluidic oscillator is a component that generates a self-excited oscillation in its interior without having to rely on moving components, so that a periodically oscillating beam is generated at an output of the fluidic oscillator.
  • the term "oscillator” indicates that it is a component that is designed to oscillate, ie emits an oscillating jet at its outlet when water passes through, and which The term "fluidic" indicates that the oscillator has no moving parts.
  • the fluidic oscillator Due to its design, ie in particular its geometry and dimensions, the fluidic oscillator is able to expel the self-oscillating jet when water flows through it. It is an effective, efficient and practical component that is designed to be static.
  • the fluidic oscillator is reliable, durable, robust, virtually maintenance-free and non-destructive, has no moving parts, can be scaled as required, and an output speed and frequency of the water from it can be set depending on its geometry. It can therefore be easily integrated into a water-bearing household appliance of any size.
  • the fluidic oscillator has, for example, a symmetrical structure of an inlet, a flow chamber, two return channels and an outlet and is characterized by a self-excited oscillation inside, so that either an oscillating free jet emerges at its outlet when water passes through or a periodic switch of two discrete output units is possible if the output is divided into two discrete output units, for example by a wall.
  • the fluidic oscillator is designed in such a way that when water is applied, the resulting water jet is automatically applied to one of several sides in the flow chamber after flowing through the inlet, impacts against a wall downstream of the flow chamber and splits into two flows. The first stream leaves the fluidic oscillator through the output or one of the two output units.
  • the second flow is passed through one of two return channels and via it back into the flow chamber and presses the water flow flowing through the flow chamber against another wall of the flow chamber.
  • the process is mirror-inverted and the water jet leaves the fluidic oscillator through the exit in a different direction than before or through the other exit unit.
  • the process is re-initialized so that the water jet leaving the fluidic oscillator is oscillating.
  • the advantages that can be achieved with the invention are, in addition to the possibility of directing the water jet in more than one direction, that if there is more than one nozzle, the nozzles can be actuated with a time delay.
  • the water supply line can be, for example, a water supply that connects an external water network with the water-carrying household appliance.
  • the water supply line can also be a water supply line that is designed to convey water from one area of the household appliance to another area of the household appliance.
  • the water supply line is designed in particular to convey water as a liquid and / or steam.
  • the water supply line is preferably designed to contain water in liquid and / or gaseous form To guide form, where one or more other components such as detergent, dishwashing detergent or the like may be added to the water.
  • the at least one nozzle is preferably an immobile nozzle.
  • the at least one nozzle can be a single nozzle assigned to the water supply line.
  • the fluidic oscillator can be placed between the water supply line and the nozzle directly, i.e. be placed in between without any further components.
  • the water supply line can be assigned several nozzles which are arranged or formed in several channels. The fluidic oscillator is then preferably arranged between the water supply line and the channels having the nozzles.
  • the fluidic oscillator is connected to the water supply line and the nozzle in such a way that water is passed via the water supply line through the fluidic oscillator into a nozzle. If a nozzle is assigned to the water supply line, the jet area of the nozzle is enlarged by means of the fluidic oscillator.
  • a nozzle is arranged in a channel and a further nozzle is arranged in a further channel.
  • the channel and the further channel are arranged adjacent to an outlet of the fluidic oscillator.
  • the fluidic oscillator is arranged between the water supply line and the channel and the further channel, which, during operation, periodically switches the water flowing through it from the water supply line into the channel and the other channel, so that one nozzle and the other nozzle alternate with it Water are supplied. This can increase the pressure on the nozzles.
  • the washing machine preferably has a dispenser drawer which has the channel and the further channel.
  • the washing machine can have a dispenser drawer with compartments in which several channels are arranged, each having a plurality of nozzles.
  • a compartment has a channel and a further channel which are separated from one another and each have a plurality of nozzles.
  • the fluidic oscillator is arranged and designed in the washing machine in such a way that when water is supplied it alternately supplies water to the channel and to the further channel of the dispenser drawer.
  • the at least one nozzle is designed to direct water into a drum of the washing machine and / or to the door for closing the washing machine.
  • the household appliance is, for example, a front loading washing machine which has a tub for holding washing liquid, a drum rotatably mounted in the tub for holding laundry, a loading opening for loading the drum with the laundry and a door for closing the loading opening, wherein the door has a sight glass.
  • the water supply line and the at least one nozzle are then, for example, part of a door sight glass flushing system which is designed to direct water both onto the sight glass and into the drum. A faster and better wetting of the laundry can be achieved if the fluidic oscillator is connected upstream of the nozzle. This allows the nozzle to radiate over a larger area.
  • the washing machine can furthermore have a flooding device which is designed to convey water from one area of the tub into a further region of the tub.
  • the at least one nozzle is a nozzle of the flooding device, which is designed to spray the water into the further area of the tub.
  • the flooding device has the water supply line in which a flooding pump is arranged. The water supply line is connected at one end to the preferably lower area of the tub and at the other end via the hydraulic oscillator to the nozzle, so that water from the preferably lower region of the tub through the circulation pump, the hydraulic oscillator and the nozzle into the other can lead preferably upper area of the tub, based on the operational installation position of the washing machine.
  • the at least one nozzle is preferably arranged on a door sealing ring, which is arranged between a door for closing the household appliance and a loading opening for loading the household appliance.
  • This nozzle arranged on the door sealing ring can be formed integrally with it.
  • the nozzle represents what is known as a flooding nozzle.
  • a heating element is preferably arranged on and / or in the water supply line. More preferably, the heating element is designed to generate steam from water, which is conducted via the water supply line via the fluidic oscillator through the nozzle into the drum.
  • This refinement is particularly advantageous if the water supply line and the at least one nozzle are part of the door inspection glass flushing system, because it enables laundry to be heated during a damp washing program of the washing machine.
  • the steam can be better distributed within the drum with the nozzle, which is preceded by the fluidic oscillator.
  • the household appliance is a washing machine.
  • a washing machine has nozzles in a cistern that are connected to a water supply line, a door inspection glass flushing nozzle that is connected to a water supply line and possibly a flooding nozzle that is connected to a water supply line.
  • An arrangement of the fluidic oscillator is possible between all of the above water supply lines and nozzles and leads to an improvement in the washing machine efficiency.
  • Fig. 1 shows schematically a partial cross-sectional view of a water-bearing household appliance.
  • the water-carrying household appliance has a water supply line 2, a fluidic oscillator 3, a plurality of nozzles 1 and a plurality of further nozzles 1 '.
  • the plurality of nozzles 1 are arranged in a channel 4, while the plurality of further nozzles 1 'are arranged in a further channel 4'.
  • the fluidic oscillator 3 has an inlet 31, a flow chamber 32, a return channel 33, a further return channel 34 and an outlet 35.
  • the inlet 31 of the fluidic oscillator 3 is arranged adjacent to the water inlet 2, while the outlet 35 of the fluidic oscillator 3 is arranged adjacent to the channel 4 and the further channel 4 '.
  • the water flows in the direction of the arrow through the water supply line 2, the inlet 31 into the flow chamber 32.
  • the water jet flowing into the flow chamber 32 automatically applies to one of the sides in the flow chamber, impacts a wall 36 downstream of the flow chamber 32 and splits into two streams.
  • the first stream which is the main stream, leaves the fluidic oscillator 3 through the outlet 35 and flows into the channel 4, as in FIG Fig. 1 is represented by the arrows.
  • the second flow (not shown) is passed through the further return channel 34 and then passed again into the flow chamber 32 and presses the water flow flowing through the flow chamber 32 from the water supply line 2 to a further wall 37 in the flow chamber 32, the water flow in splits two streams.
  • the process is mirror-inverted: the first flow, which is the main flow, leaves the fluidic oscillator 3 through the outlet 35 into the further channel 4 ', the second flow is passed through the return channel 33 and via it again into the Flow chamber 32 and presses the water flow flowing through the flow chamber 32 from the water supply line 2 to the wall 36 in the flow chamber 32, the water flow splitting into two flows and the further flow of the water continuing as described above.
  • Fig. 2 shows the fluidic oscillator 3 from Fig. 1 in an enlarged cross-sectional view. Exemplary dimensions are shown which lead to the functionality explained below.
  • the design of the geometry in the following is based on a volume flow V of at least 4 liters / minute (l / min) upstream of the fluidic oscillator 3.
  • this geometry results in a pendulum movement (oscillation) with a frequency of at least 2 Hz, so that the subsequent separate channels 35 are flown through alternately with an amplitude of at least 3.9 l / min each.
  • This periodic pendulum movement with a frequency of 2 Hz and maximum amplitude starts after a time interval of max. 2 seconds on.
  • the geometry can be designed as follows, for example: A fully developed flow V flows through the fluidic oscillator 3 ideally. It has wedge-shaped block tips 21 with an angle 22 of max. 25 ° to create a dead water area T (recirculation bubble) through a sharp trailing edge in the wake.
  • the outlet nozzle 23 should have a distance of max. 7.0 mm and an angle 24 of max. 20 ° to ensure the required return flow rate.
  • the width of the outlet nozzle 23 is here max. 6.5 mm.
  • the cross section of a nozzle (see Fig. 1 ) is max. 2.4 mm with a max. Total number of 38 nozzles.
  • the amplitude is influenced by a conical inlet nozzle with a distance 25 of max. 11 mm and an angle 26 of max. 14 °.
  • the distance 27 between the blocks must be at least 23.0 mm.
  • the frequency is influenced by the distance 28 between the wedge-shaped blocks 21, which should be at least 15% smaller than the opening 25 of the inlet nozzle.
  • the distance 27 between the blocks should be at least 9.5 mm.
  • the width 29 of the feedback channel 30 should be at least 8.0 mm.
  • the total width B of the fluidic oscillator 3 should be at least 37 mm and the total length L should be at least 44 mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Nozzles (AREA)
EP16193461.7A 2015-10-13 2016-10-12 Wasserführendes haushaltsgerät Active EP3155949B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL16193461T PL3155949T3 (pl) 2015-10-13 2016-10-12 Prowadzące wodę urządzenie gospodarstwa domowego

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015117392.1A DE102015117392A1 (de) 2015-10-13 2015-10-13 Wasserführendes Haushaltsgerät

Publications (2)

Publication Number Publication Date
EP3155949A1 EP3155949A1 (de) 2017-04-19
EP3155949B1 true EP3155949B1 (de) 2020-08-19

Family

ID=56990289

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16193461.7A Active EP3155949B1 (de) 2015-10-13 2016-10-12 Wasserführendes haushaltsgerät

Country Status (4)

Country Link
EP (1) EP3155949B1 (es)
DE (1) DE102015117392A1 (es)
ES (1) ES2815679T3 (es)
PL (1) PL3155949T3 (es)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112376205B (zh) * 2020-11-30 2023-12-15 无锡小天鹅电器有限公司 一种供水控制方法、工作台部装以及洗衣机

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29805990U1 (de) * 1997-04-09 1998-05-28 Elbi Int Spa Wassereinlaßvorrichtung für die Waschkammer einer Waschmaschine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2534261C2 (de) * 1974-09-30 1982-03-11 Bowles Fluidics Corp., Silver Spring, Md. Düse zum Beaufschlagen von Oberflächen mittels eines Stromes einer Reinigungsflüssigkeit und/oder eines Gases
CN1299833C (zh) * 2001-01-05 2007-02-14 东陶机器株式会社 喷水装置
US20040250837A1 (en) * 2003-06-13 2004-12-16 Michael Watson Ware wash machine with fluidic oscillator nozzles
US7951244B2 (en) * 2008-01-11 2011-05-31 Illinois Tool Works Inc. Liquid cleaning apparatus for cleaning printed circuit boards

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29805990U1 (de) * 1997-04-09 1998-05-28 Elbi Int Spa Wassereinlaßvorrichtung für die Waschkammer einer Waschmaschine

Also Published As

Publication number Publication date
EP3155949A1 (de) 2017-04-19
DE102015117392A1 (de) 2017-04-13
PL3155949T3 (pl) 2021-02-08
ES2815679T3 (es) 2021-03-30

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