EP2345759B1 - Hydraulisches System für einen Waschmittelspender einer Waschmaschine - Google Patents

Hydraulisches System für einen Waschmittelspender einer Waschmaschine Download PDF

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Publication number
EP2345759B1
EP2345759B1 EP11157515.5A EP11157515A EP2345759B1 EP 2345759 B1 EP2345759 B1 EP 2345759B1 EP 11157515 A EP11157515 A EP 11157515A EP 2345759 B1 EP2345759 B1 EP 2345759B1
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EP
European Patent Office
Prior art keywords
cross
hydraulic system
feed pipe
minimum value
section area
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Application number
EP11157515.5A
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English (en)
French (fr)
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EP2345759A1 (de
Inventor
Jean-Yves Noel
Alfredo Traina
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Electrolux Home Products Corp NV
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Electrolux Home Products Corp NV
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Application filed by Electrolux Home Products Corp NV filed Critical Electrolux Home Products Corp NV
Priority to EP11157515.5A priority Critical patent/EP2345759B1/de
Publication of EP2345759A1 publication Critical patent/EP2345759A1/de
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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 
    • D06F39/02—Devices for adding soap or other washing agents
    • 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 
    • D06F39/02—Devices for adding soap or other washing agents
    • D06F39/028—Arrangements for selectively supplying water to detergent compartments

Definitions

  • the present invention relates to a hydraulic system for a laundry washing machine detergent dispenser.
  • a standard laundry washing machine comprises a detergent dispenser having a tank with a number of compartments connected at the bottom to the wash tub housing the rotating laundry drum.
  • the detergent dispenser also comprises a hydraulic system for feeding a stream of water downwards into each compartment to gradually dilute and flush the detergent/softener from the compartment into the wash tub.
  • the tank normally requires three separate streams of water fed selectively into three different compartments, so the hydraulic system comprises three separate feed pipes terminating inside the tank; and, to regulate water flow along the three feed pipes independently, three solenoid valves were formerly used, each located upstream from a respective feed pipe.
  • Solenoid valves are fairly expensive, so, to reduce the cost of the hydraulic system, it has been proposed to use two delivery pipes, each fitted with a respective solenoid valve; and a cross mixer interposed between the two delivery pipes and the three feed pipes, and which, when fed with respective incoming streams of water from both the delivery pipes, directs an outgoing stream of water, generated by intersection of the two incoming streams, into a central feed pipe.
  • the outgoing streams of water from the two delivery pipes intersect at the cross mixer, so, when both delivery pipes feed respective streams of water into the cross mixer, the two incoming streams of water intersect to form an outgoing stream of water, which is directed into a central feed pipe.
  • WO 2004/106617 discloses a clothes washing machine comprising: a common water-distribution manifold, a plurality of electromagnetic valves provided downstream of said water-distribution manifold and connected on a respective inlet side thereof to said common water-distribution manifold, a plurality of outlet conduits provided at the delivery orifices of said electromagnetic valves, a respective plurality of chambers supplied via a respective one of said outlet conduits, in which a cold-water inlet conduit directly connects the low-temperature water delivery system to said water-distribution manifold, a hot-water inlet conduit connects the high-temperature water delivery system to a pre-determined one of said outlet conduits downstream of the respective electromagnetic valve, and a further electromagnetic valve is provided in said hot-water inlet conduit.
  • a temperature sensor Inside a pre-determined outlet conduit, and downstream of the respective electromagnetic valve, there is provided a temperature sensor.
  • Number 1 in Figure 1 indicates as a whole a laundry washing machine detergent dispenser.
  • Detergent dispenser 1 comprises a tank 2 having three compartments 3 with holes at the bottom for connection to the wash tub housing the rotating laundry drum. More specifically, two compartments 3 for a measure of detergent or softener are arranged side by side at the front, and the third compartment 3 is located at the rear.
  • Detergent dispenser 1 also comprises a hydraulic system 4 for feeding a stream of water downwards into each compartment 3.
  • the two front compartments 3 are supplied with water by hydraulic system 4 to gradually dilute and flush the detergent/softener from front compartments 3 into the wash tub, while the water supplied by hydraulic system 4 to rear compartment 3 flows directly into the wash tub for rinsing.
  • the hydraulic system comprises three separate feed pipes 5 terminating inside tank 2 at respective compartments 3. More specifically, one feed pipe 5 supplying water to rear compartment 3 is located centrally, and the other two feed pipes 5 supplying water to front compartments 3 are located on opposite sides of the central feed pipe 5.
  • the three feed pipes 5 are supplied with water by two delivery pipes 6 via a cross mixer 7 interposed between the two delivery pipes 6 and the three feed pipes 5.
  • the two delivery pipes 6 intersect at a 90° angle
  • the two lateral feed pipes 5 form extensions of the two delivery pipes 6 (and therefore also form a 90° angle)
  • the central feed pipe 5 is located between the two lateral feed pipes 5.
  • an inlet 8 of each lateral feed pipe 5 is located facing and parallel to an outlet 9 of a respective delivery pipe 6, and an inlet 8 of the central feed pipe 5 is located opposite outlets 9 of the two delivery pipes 6, and forms a 45° angle with outlet 9 of each delivery pipe 6.
  • Cross mixer 7 comprises a closed central chamber 10 (i.e. completely isolated from the outside), into which outlets 9 of the two delivery pipes 6 and inlets 8 of the three feed pipes 5 debouche.
  • chamber 10 is closed, i.e. completely isolated from the outside, and is therefore bounded by lateral, top, and bottom walls 11.
  • the fact that chamber 10 is closed is important, in that intersection of the two streams of water from the two delivery pipes 6 produces a centrally-directed main stream that tends to swell vertically.
  • Chamber 10 being closed, however, the top and bottom walls 11 of chamber 10 retain and direct the top- and bottommost portions of the main stream towards inlet 8 of central feed pipe 5.
  • Each delivery pipe 6 is regulated by a respective solenoid valve 12 located upstream from delivery pipe 6, and which can be set to a closed setting cutting off water supply to delivery pipe 6, and an open setting permitting water supply to delivery pipe 6.
  • the central feed pipe 5 is "bulb-shaped": from inlet 8 facing cross mixer 7, the cross section area starts out at a first minimum value, increases gradually to a maximum value, and finally decreases gradually to a second minimum value smaller than the first.
  • the ratio between the first and second minimum value of the cross section area of central feed pipe 5 normally ranges between 1.5 and 2.5, and preferably between 1.9 and 2.1; the ratio between the maximum value and the first minimum value normally ranges between 1.3 and 2.1, and preferably between 1.6 and 1.8; and the ratio between the maximum value and the second minimum value normally ranges between 2.5 and 4, and preferably between 3.1 and 3.5.
  • the area of inlet 8 of central feed pipe 5 is 2 to 4 times the area of inlet 8 of each lateral feed pipe 5.
  • the cross section area of each lateral feed pipe 5 has a minimum value at inlet 8 facing cross mixer 7, and increases gradually from inlet 8 to a maximum value; the ratio between the maximum and minimum value of the cross section area of each lateral feed pipe 5 normally ranges between 1.2 and 2, and preferably between 1.5 and 1.7; and the ratio between the maximum value of the cross section area of each lateral feed pipe 5 and the cross section area of outlet 9, facing cross mixer 7, of each delivery pipe 6 normally ranges between 1 and 1.6, and preferably between 1.2 and 1.4.
  • each delivery pipe 6 decreases gradually to a minimum value at outlet 9 facing cross mixer 7, so that the ratio between the cross section area of outlet 9, facing cross mixer 7, of each delivery pipe 6 and the cross section area of inlet 8 of each lateral feed pipe 5 normally ranges between 1 and 1.6, and preferably between 1.2 and 1.4.
  • edges separating inlet 8 of central feed pipe 5 from inlets 8 of lateral feed pipes 5 are preferably rounded.
  • central feed pipe 5 at cross mixer 7 provides for maximizing inflow into central feed pipe 5 of the main stream of water produced by the two intersecting streams from the two delivery pipes 6.
  • Outlets 9 of the two delivery pipes 6 have a relatively small cross section with respect to feed pipes 5, so that water flows out of outlets 9 of the two delivery pipes 6 at relatively high speed and therefore with greater direction to reduce dispersion.
  • respective air break spaces 13 are located along feed pipes 5, downstream from cross mixer 7, and are each defined by a portion of the pipe having no bottom wall. Air break spaces 13 are provided to comply with international regulations governing the manufacture of laundry washing machines and requiring interruption of the continuity of mains water supply pipes, and act as hydraulic non-return valves to prevent contaminated (e.g. detergent-containing) or dirty water from flowing back from tank 2 to the mains via hydraulic system 4, in the event of a malfunction.
  • contaminated e.g. detergent-containing
  • the air break spaces 13 of the two lateral feed pipes 5 also provide for cutting off any dispersion accidentally flowing into the two lateral feed pipes 5 as the main stream, produced by intersection of the two streams from the two delivery pipes 6, is formed in cross mixer 7.
  • the flow and speed, in fact, of any dispersion accidentally flowing into the two lateral feed pipes 5 are so low as to prevent it from getting past air break spaces 13, thus ensuring against any undesired flow from lateral feed pipes 5 to front compartments 3.
  • each feed pipe 5 has a bulge, which extends both upwards and laterally, and, at the top, preferably has a semicircular cross section with its axis of symmetry parallel to feed pipe 5.
  • feed pipe 5 comprises, at air break space 13, an inlet 14 (into which water flows from air break space 13) located lower down and larger vertically than an outlet 15 (from which water flows into air break space 13).
  • Central feed pipe 5 terminates at air break space 13, this being located over rear compartment 3 supplied by central feed pipe 5.
  • air break space 13 of central feed pipe 5 constitutes both an interruption in the continuity of the pipe, and an outlet into rear compartment 3.
  • each lateral feed pipe 5 Downstream from air break space 13, each lateral feed pipe 5 preferably has a sloping portion 16, which slopes downwards and preferably has an S-shaped vertical section.
  • the water flowing along each lateral feed pipe 5 undergoes a considerable loss in pressure as it flows through respective air break space 13, and each sloping portion 16 provides, downstream from air break space 13, for increasing the pressure of the water flowing along feed pipe 5, so as to at least partly compensate for the pressure loss caused by air break space 13.
  • each lateral feed pipe 5 comprises an end portion 17 located over a respective front compartment 3 of tank 2 and having a number of through outlet holes 18 underneath.
  • each end portion 17 is curved and forms at least one "U", and outlet holes 18 are located asymmetrically on the outer side of the curve to reduce the swirl produced inside feed pipe 5 by outlet holes 18, and so reduce load losses inside feed pipe 5, and air intake into feed pipe 5 through outlet holes 18.
  • a given total outflow from outlet holes 18 is therefore achieved with a lower feed pressure to delivery pipes 6, and the noise level is also greatly reduced.
  • outlet holes 18 are also shaped to reduce load losses in feed pipe 5, and air intake into feed pipe 5 through outlet holes 18. More specifically, each outlet hole 18 is crescent-shaped with its concavity facing in the water flow direction along feed pipe 5.
  • the rear edge of each outlet hole 18 is circular (i.e. defined by an arc of a circle), whereas, in a different embodiment not shown, the rear edge of each outlet hole 18 is straight (i.e. defined by a straight segment).
  • delivery pipes 6, cross mixer 7, and feed pipes 5 are defined in a single one-piece body 19 (i.e. formed in one seamless, indivisible piece) injection-molded from plastic material (e.g. polypropylene or polyethylene).
  • One-piece body 19 preferably comprises a flat reinforcing portion 20 surrounding feed pipes 5 on the inside and outside, and which has eyelets 21 on the outside for engaging respective teeth 22 projecting from an edge of tank 2.
  • the function of reinforcing portion 20 is to increase the strength of one-piece body 19 and connect one-piece body 19 easily to tank 2.
  • Hydraulic system 4 as described above has numerous advantages, by being cheap and easy to produce and assemble, by having only modest load losses as a whole, and by operating extremely well, even when actual performance of the two solenoid valves 12 regulating the two delivery pipes 6 differs as a result of manufacturing tolerances.
  • actual water flow along central feed pipe 5 always equals the designed rated flow, even when actual performance of the two solenoid valves 12 regulating the two delivery pipes 6 differs as a result of manufacturing tolerances.
  • hydraulic system 4 as described above provides for totally eliminating harmful dispersion along lateral feed pipes 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Accessories For Mixers (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Treatment Of Fiber Materials (AREA)

Claims (15)

  1. Hydraulisches System (4) für einen Waschmittelspender (1) einer Waschmaschine, wobei der Waschmittelspender (1) einen Behälter (2) mit einer Anzahl von Fächern (3) umfasst; wobei das hydraulisches System (4) umfasst:
    zwei Zuführrohre (6);
    zwei Magnetventile (12), die den Zuführrohren (6) vorgeschaltet angeordnet sind, um eine Wasserströmung entlang der Zuführrohre (6) zu regulieren;
    drei Zuleitungsrohre (5), die im Behälter (2) enden; und
    einen Kreuzmischer (7), der zwischen den beiden Zuführrohren (6) und den drei Zuleitungsrohren (5) zwischengeschaltet ist, um einen Wasserstrom zu einem zentralen Zuleitungsrohr (5) zu leiten, der durch eine Kreuzung der beiden Wasserströme aus beiden Zuführrohren (6) gebildet ist; wobei das hydraulische System (4) dadurch gekennzeichnet ist, dass das zentrale Zuleitungsrohr (5) am Kreuzmischer (7) "glühbirnenförmig" ist; wobei die Querschnittsfläche von einem dem Kreuzmischer (7) zugewandten Einlass (8) mit einem ersten Mindestwert beginnt, sich allmählich zu einem Maximalwert erhöht und schließlich allmählich zu einem zweiten Mindestwert abnimmt, der kleiner als der erste Mindestwert ist.
  2. Hydraulisches System (4) nach Anspruch 1, wobei das Verhältnis zwischen dem ersten Mindestwert und dem zweiten Mindestwert der Querschnittsfläche des zentralen Zuleitungsrohrs (5) im Bereich zwischen 1,5 und 2,5 liegt.
  3. Hydraulisches System (4) nach Anspruch 1, wobei das Verhältnis zwischen dem ersten Mindestwert und dem zweiten Mindestwert der Querschnittsfläche des zentralen Zuleitungsrohrs (5) im Bereich zwischen 1,9 und 2,1 liegt.
  4. Hydraulisches System (4) nach Anspruch 1, 2 oder 3, wobei das Verhältnis zwischen dem Maximalwert und dem ersten Mindestwert im Bereich zwischen 1,3 und 2,1 liegt.
  5. Hydraulisches System (4) nach Anspruch 1, 2 oder 3, wobei das Verhältnis zwischen dem Maximalwert und dem ersten Mindestwert im Bereich zwischen 1,6 und 1,8 liegt.
  6. Hydraulisches System (4) nach einem der Ansprüche 1 bis 5, wobei das Verhältnis zwischen dem Maximalwert und dem zweiten Mindestwert im Bereich zwischen 2,5 und 4 liegt.
  7. Hydraulisches System (4) nach einem der Ansprüche 3 bis 5, wobei das Verhältnis zwischen dem Maximalwert und dem zweiten Mindestwert im Bereich zwischen 3,1 und 3,5 liegt.
  8. Hydraulisches System (4) nach einem der Ansprüche 1 bis 7, wobei die Fläche eines Einlasses (8) des zentralen Zuleitungsrohrs (5) am Kreuzmischer (7) 2- bis 4-mal die Fläche eines Einlasses (8) jedes seitlichen Zuleitungsrohrs (5) ist.
  9. Hydraulisches System (4) nach einem der Ansprüche 1 bis 8, wobei die Querschnittsfläche jedes seitlichen Zuleitungsrohrs (5) einen Mindestwert an einem dem Kreuzmischer (7) zugewandten Einlass (8) aufweist und sich vom Einlass (8) allmählich auf einen Maximalwert erhöht.
  10. Hydraulisches System (4) nach Anspruch 9, wobei das Verhältnis zwischen dem Maximalwert und dem Mindestwert der Querschnittsfläche jedes seitlichen Zuleitungsrohrs (5) im Bereich zwischen 1,2 und 2 liegt.
  11. Hydraulisches System (4) nach Anspruch 9, wobei das Verhältnis zwischen dem Maximalwert und dem Mindestwert der Querschnittsfläche jedes seitlichen Zuleitungsrohrs (5) im Bereich zwischen 1,5 und 1,7 liegt.
  12. Hydraulisches System (4) nach Anspruch 9, 10 oder 11, wobei das Verhältnis zwischen dem Maximalwert der Querschnittsfläche jedes seitlichen Zuleitungsrohrs (5) und der Querschnittsfläche eines dem Kreuzmischer (7) zugewandten Auslasses (9) jedes Zuführrohrs (6) im Bereich zwischen 1 und 1,6 liegt.
  13. Hydraulisches System (4) nach Anspruch 9, 10 oder 11, wobei das Verhältnis zwischen dem Maximalwert der Querschnittsfläche jedes seitlichen Zuleitungsrohrs (5) und der Querschnittsfläche eines dem Kreuzmischer (7) zugewandten Auslasses (9) jedes Zuführrohrs (6) im Bereich zwischen 1,2 und 1,4 liegt.
  14. Hydraulisches System (4) nach einem der Ansprüche 1 bis 13, wobei die Querschnittsfläche jedes Zuführrohrs (6) allmählich auf einen Mindestwert am dem Kreuzmischer (7) zugewandten Auslass (9) abnimmt.
  15. Hydraulisches System (4) nach einem der Ansprüche 1 bis 14, wobei das Verhältnis zwischen der Querschnittsfläche eines dem Kreuzmischer (7) zugewandten Auslasses (9) jedes Zuführrohrs (6) und der Querschnittsfläche eines Einlasses (8) jedes seitlichen Zuleitungsrohrs (5) im Bereich zwischen 1 und 1,6 liegt.
EP11157515.5A 2008-01-14 2008-01-14 Hydraulisches System für einen Waschmittelspender einer Waschmaschine Active EP2345759B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11157515.5A EP2345759B1 (de) 2008-01-14 2008-01-14 Hydraulisches System für einen Waschmittelspender einer Waschmaschine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP08150247A EP2078779B1 (de) 2008-01-14 2008-01-14 Hydraulisches System für einen Waschmittelspender einer Waschmaschine
EP11157515.5A EP2345759B1 (de) 2008-01-14 2008-01-14 Hydraulisches System für einen Waschmittelspender einer Waschmaschine

Related Parent Applications (4)

Application Number Title Priority Date Filing Date
EP08150247 Previously-Filed-Application 2008-01-14
EP08150247A Division EP2078779B1 (de) 2008-01-14 2008-01-14 Hydraulisches System für einen Waschmittelspender einer Waschmaschine
EP08150247A Previously-Filed-Application EP2078779B1 (de) 2008-01-14 2008-01-14 Hydraulisches System für einen Waschmittelspender einer Waschmaschine
EP08150247.8 Division 2008-01-14

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EP2345759A1 EP2345759A1 (de) 2011-07-20
EP2345759B1 true EP2345759B1 (de) 2014-03-19

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EP08150247A Not-in-force EP2078779B1 (de) 2008-01-14 2008-01-14 Hydraulisches System für einen Waschmittelspender einer Waschmaschine
EP11157499A Not-in-force EP2345758B1 (de) 2008-01-14 2008-01-14 Hydraulisches System für einen Waschmittelspender einer Waschmaschine
EP11157515.5A Active EP2345759B1 (de) 2008-01-14 2008-01-14 Hydraulisches System für einen Waschmittelspender einer Waschmaschine

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EP08150247A Not-in-force EP2078779B1 (de) 2008-01-14 2008-01-14 Hydraulisches System für einen Waschmittelspender einer Waschmaschine
EP11157499A Not-in-force EP2345758B1 (de) 2008-01-14 2008-01-14 Hydraulisches System für einen Waschmittelspender einer Waschmaschine

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EP (3) EP2078779B1 (de)
AT (1) ATE516399T1 (de)
ES (1) ES2369801T3 (de)
PL (1) PL2078779T3 (de)

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US20160015240A1 (en) * 2014-07-21 2016-01-21 Lg Electronics Inc. Dishwasher

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WO2010023304A1 (en) * 2008-09-01 2010-03-04 Arcelik Anonim Sirketi A washing machine
PL2519676T3 (pl) * 2009-12-30 2014-04-30 Arcelik As Pralka zawierająca pojemnik na detergent
FR2959248B1 (fr) * 2010-04-21 2012-10-05 Fagorbrandt Sas Dispositif de distribution d'eau, notamment pour machine a laver le linge
CN103384736B (zh) * 2010-12-29 2016-08-31 阿塞里克股份有限公司 包括清洁剂分配器的洗衣机
CN103572569B (zh) * 2012-07-27 2017-02-15 博西华电器（江苏）有限公司 具有供水组件的家用电器
WO2015063005A1 (en) * 2013-11-01 2015-05-07 Arcelik Anonim Sirketi A washing machine comprising a cleaning agent dispenser
EP3063328B1 (de) * 2013-11-01 2019-09-04 Arçelik Anonim Sirketi Waschmaschine mit einem reinigungsmittelspender
EP2889418B1 (de) * 2013-12-24 2016-09-21 Electrolux Appliances Aktiebolag Waschmaschine
EP3184688B1 (de) 2015-12-23 2018-11-28 Electrolux Appliances Aktiebolag Waschmaschine mit einem behandlungsmittelspender mit wasserzufuhrvorrichtung
KR102551727B1 (ko) 2016-08-19 2023-07-06 삼성전자주식회사 세제공급장치 및 이를 포함하는 세탁기
CN114164623B (zh) * 2020-09-11 2023-04-07 无锡小天鹅电器有限公司 分配器、进水***及衣物处理装置
CN114164624B (zh) * 2020-09-11 2023-03-07 无锡小天鹅电器有限公司 分配器、进水***及衣物处理装置
US11795604B2 (en) * 2021-08-11 2023-10-24 Haier Us Appliance Solutions, Inc. Additive dispensing system for a washing machine appliance

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Publication number Priority date Publication date Assignee Title
US20160015240A1 (en) * 2014-07-21 2016-01-21 Lg Electronics Inc. Dishwasher
US10028637B2 (en) * 2014-07-21 2018-07-24 Lg Electronics Inc. Dishwasher

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Publication number Publication date
EP2078779A1 (de) 2009-07-15
EP2078779B1 (de) 2011-07-13
PL2078779T3 (pl) 2012-02-29
EP2345758A1 (de) 2011-07-20
ES2369801T3 (es) 2011-12-07
EP2345758B1 (de) 2012-09-19
ATE516399T1 (de) 2011-07-15
EP2345759A1 (de) 2011-07-20

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