EP0571806A1 - Einrichtung zur Messung der einem Haushaltsgerät zugeführten Wassermenge - Google Patents

Einrichtung zur Messung der einem Haushaltsgerät zugeführten Wassermenge Download PDF

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Publication number
EP0571806A1
EP0571806A1 EP93107612A EP93107612A EP0571806A1 EP 0571806 A1 EP0571806 A1 EP 0571806A1 EP 93107612 A EP93107612 A EP 93107612A EP 93107612 A EP93107612 A EP 93107612A EP 0571806 A1 EP0571806 A1 EP 0571806A1
Authority
EP
European Patent Office
Prior art keywords
water
flow
electric appliance
washing tank
domestic electric
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.)
Granted
Application number
EP93107612A
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English (en)
French (fr)
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EP0571806B1 (de
Inventor
Enzo Brignone
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.)
Bitron SpA
Original Assignee
Bitron SpA
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Filing date
Publication date
Application filed by Bitron SpA filed Critical Bitron SpA
Publication of EP0571806A1 publication Critical patent/EP0571806A1/de
Application granted granted Critical
Publication of EP0571806B1 publication Critical patent/EP0571806B1/de
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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
    • A47L15/4244—Water-level measuring or regulating 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
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4217—Fittings for water supply, e.g. valves or plumbing means to connect to cold or warm water lines, aquastops

Definitions

  • the present invention relates to equipment for measuring the quantity of water supplied to a domestic electric appliance, particularly a dishwasher.
  • Equipment of the first type measures the quantity of water present in the washing tank of the domestic electric appliance by means of floating or pressure-sensitive devices.
  • the latter in particular are very simple and reliable in operation but are not very precise. In fact, they measure a volume of water with reference to the pressure it exerts, which is determined by the depth of the water. Because of the geometric configuration of the washing tank, however, the body of water is long and wide but shallow. Small errors relating to the pressure determination therefore translate into considerable errors in the determination of the volume of water.
  • Known equipment of the second type measures the quantity of water admitted to the washing tank. This measurement can be made very precisely, for example, by directing the supply water into a chamber of a predetermined volume before sending it into the washing tank. In practice, since a chamber which would contain the entire volume of water to be supplied would occupy too much space, a smaller chamber is used and is filled several times until the total volume to be supplied is reached. This method therefore prolongs the time taken to supply the water.
  • the subject of the present invention is equipment for measuring the quantity of water supplied to a domestic electric appliance, particularly a dishwasher, characterised in that it comprises: means for dividing a flow of water which comes from a supply duct,and is directed into a washing tank of the domestic electric appliance, into at least two partial flows, means for determining whether the quantity of water which has flowed in one of the at least two partial flows, known as the measuring flow, corresponds to a predetermined value, the ratio between the value and the total quantity of water to be supplied to the washing tank being the same as the ratio between the measuring flow and the total supply flow, and means for stopping the flow of supply water when the quantity of water which has flowed in the measuring flow corresponds to the predetermined value.
  • the fraction corresponding to the ratio between the measuring flow and the total supply flow is measured, for example, by being made to flow into a chamber of predetermined volume which corresponds to a fraction of the total volume to be supplied, the fraction corresponding to the ratio between the measuring flow and the total supply flow.
  • the rest of the supply flow is sent directly to the washing tank so that, when the chamber of predetermined volume is full of water, which is subsequently sent into the washing tank, the supply operation is stopped. This can be achieved quickly and accurately.
  • the means for stopping the flow of supply water can also detect whether the quantity of water present in the tank of the domestic electric appliance falls below a predetermined value during the normal operation cycle of the domestic electric appliance.
  • the equipment according to the invention thus has the further advantage that, like the known equipment of the first type described above, it enables the quantity of water present in the washing tank to be monitored during the operating cycle, whereas the known equipment which measures the flow of supply water does not offer this possibility.
  • a disc 16 Mounted on the outlet end 14 of a duct 10, disposed downstream of a water softener for dishwashers (of known type described in detail in the Applicant's European Patent Application No. 93104160.2 and generally indicated 12 in Figures 1 and 2) is a disc 16 having a plurality of passages 18 out of each of which a respective partial flow of water can flow ( Figures 3 to 5).
  • One of the passages 18a is isolated from the rest of the passages 18 by a sleeve 20 which projects from the disc 16 so that the flow 22 which flows out of the passage 18a and which, as will become clear from the following description, is known as the measuring flow, is directed into a receiving chamber 24 whilst the rest of the flows are directed into an inlet duct 26 ( Figure 1).
  • the duct 26 opens directly into a washing tank of the diswasher, not shown in the drawings, through a filler 28.
  • a siphon-shaped outlet duct 30 extending from the bottom of the receiving chamber 24 terminates in the detecting compartment 32 of a pressure switch 34.
  • the outlet duct 30 communicates with the inlet duct 26 by means of a first, upper opening 36 with a large cross-section and by means of a lower hole 38 having a cross-section substantially smaller than that of the outlet duct 30.
  • the pressure switch 34 which is of known type, can stop the flow of water supplied to the dishwasher by operating a valve, not shown in the drawings, when the pressure in its detecting compartment 32 exceeds a predetermined value. It can also emit a signal when the pressure in the detecting compartment 32 falls below a predetermined value, which may be the same as or different from the value mentioned above.
  • the flow of supply water which has passed through the softener 12 is divided into several partial flows as it flows through the passages 18 in the disc 16 mounted on the outlet end 14 of the duct 10.
  • the flow 22 ( Figure 3), which is known as the measuring flow, is directed into the receiving chamber 24 by the sleeve 20 whilst the rest of the flows are channelled into the inlet duct 26 and from there through the filler 28 into the washing tank.
  • the receiving chamber 24 continues to fill with water until the siphon in the outlet duct 30 starts to operate causing the chamber to empty.
  • the ratio between the volume of water present in the receiving chamber 24 when it starts to empty and the total quantity of water to be supplied to the washing tank is the same as the ratio between the measuring flow 22 and the total supply flow.
  • the water which has flowed from the receiving chamber 24 first of all fills the portion 33 of the outlet duct 30 which is disposed below the opening 36 and the detecting compartment 32 of the pressure switch 34 connected thereto and then passes through the opening 36 into the inlet duct 26 and then into the washing tank.
  • the pressure switch 34 is thus activated and stops the flow of supply water since the desired quantity of water has already been supplied, some of the water reaching the washing tank directly and some indirectly through the receiving chamber 24.
  • the opening 36 may be positioned at will at a height such that the pressure exerted in the detecting compartment 32 of the pressure switch 34 by the column of water present in the portion 33 of the duct 30 disposed below the opening 36 is definitely greater than the minimum pressure necessary to activate the switch.
  • the pressure switch 34 need not, therefore, be of a particularly sophisticated type and can have a very wide calibration range.
  • the hole 38 does not play any substantial role in this first stage of operation. In fact, since its cross-section is small compared with that of the outlet duct 30, it offers considerable resistance to the passage of water and thus prevents the lower portion 33 of the outlet duct 30 from emptying rapidly and enables the pressure switch 34 to be activated.
  • the level 40 reached by the water in the inlet duct 26 may fall, however, as a result of accidental and undesirable events, for example, if water actually leaks from the washing tank to the outside, or if a certain quantity of water becomes trapped in incorrectly-positioned items of crockery so that it cannot be used for washing.
  • the suitably-calibrated pressure switch 34 can thus provide an external indication of the decrease in pressure to show that there has been an anomalous reduction in the quantity of water actually available in the washing tank.
  • the equipment according to the invention thus not only enables the desired quantity of water to be supplied to the dishwasher quickly and accurately but also enables the actual presence of that quantity of water to be monitored during the operating cycle.

Landscapes

  • Washing And Drying Of Tableware (AREA)
  • Measuring Volume Flow (AREA)
EP93107612A 1992-05-26 1993-05-11 Einrichtung zur Messung der einem Haushaltsgerät zugeführten Wassermenge Expired - Lifetime EP0571806B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO920450A IT1257197B (it) 1992-05-26 1992-05-26 Apparecchiatura per la misurazione del quantitativo di acqua alimentata ad un apparecchio elettrodomestico.
ITTO920450 1992-05-26

Publications (2)

Publication Number Publication Date
EP0571806A1 true EP0571806A1 (de) 1993-12-01
EP0571806B1 EP0571806B1 (de) 1996-06-05

Family

ID=11410491

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93107612A Expired - Lifetime EP0571806B1 (de) 1992-05-26 1993-05-11 Einrichtung zur Messung der einem Haushaltsgerät zugeführten Wassermenge

Country Status (4)

Country Link
EP (1) EP0571806B1 (de)
DE (1) DE69302962T2 (de)
ES (1) ES2089632T3 (de)
IT (1) IT1257197B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0669099A2 (de) * 1994-02-28 1995-08-30 CANDY S.p.A. Vorrichtung zum Regeln des Niveaus der Waschflüssigkeit in einem Geschirrspüler
FR2719208A1 (fr) * 1994-04-27 1995-11-03 Bitron Spa Dispositif de réglage de la quantité d'eau acheminée dans une cuve de lavage d'un appareil électroménager.
EP0753281A1 (de) * 1995-07-14 1997-01-15 TECNOPLASTICA PREALPINA S.p.A. Steuervorrichtung des Wasserniveaus in einer Geschirrspülmaschine
WO2016038244A1 (en) * 2014-09-11 2016-03-17 Pineline Oy Apparatus and method for dispensing a wash solution for conveying the same into a washing device, car wash facility and program media

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3310236A1 (de) 2015-06-19 2018-04-25 Bitron S.p.A. Integrierte komponente für eine geschirrspülmaschine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2716252A1 (de) * 1977-04-13 1978-10-19 Bosch Siemens Hausgeraete Geschirrspuel- oder waschmaschine mit einer einrichtung zum abgeben einer in einem sammelbehaelter abgemessenen wassermenge
EP0248339A1 (de) * 1986-06-04 1987-12-09 INDUSTRIE ZANUSSI S.p.A. Waschmaschine mit Überwachungsvorrichtung für die Wasserzufuhr
EP0439397A1 (de) * 1990-01-26 1991-07-31 Esswein S.A. Wasserstandsregelvorrichtung in einer Haushaltsmaschine und Maschine ausgerüstet mit einer solchen Vorrichtung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2716252A1 (de) * 1977-04-13 1978-10-19 Bosch Siemens Hausgeraete Geschirrspuel- oder waschmaschine mit einer einrichtung zum abgeben einer in einem sammelbehaelter abgemessenen wassermenge
EP0248339A1 (de) * 1986-06-04 1987-12-09 INDUSTRIE ZANUSSI S.p.A. Waschmaschine mit Überwachungsvorrichtung für die Wasserzufuhr
EP0439397A1 (de) * 1990-01-26 1991-07-31 Esswein S.A. Wasserstandsregelvorrichtung in einer Haushaltsmaschine und Maschine ausgerüstet mit einer solchen Vorrichtung

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0669099A2 (de) * 1994-02-28 1995-08-30 CANDY S.p.A. Vorrichtung zum Regeln des Niveaus der Waschflüssigkeit in einem Geschirrspüler
EP0669099A3 (de) * 1994-02-28 1998-10-14 CANDY S.p.A. Vorrichtung zum Regeln des Niveaus der Waschflüssigkeit in einem Geschirrspüler
FR2719208A1 (fr) * 1994-04-27 1995-11-03 Bitron Spa Dispositif de réglage de la quantité d'eau acheminée dans une cuve de lavage d'un appareil électroménager.
EP0753281A1 (de) * 1995-07-14 1997-01-15 TECNOPLASTICA PREALPINA S.p.A. Steuervorrichtung des Wasserniveaus in einer Geschirrspülmaschine
WO2016038244A1 (en) * 2014-09-11 2016-03-17 Pineline Oy Apparatus and method for dispensing a wash solution for conveying the same into a washing device, car wash facility and program media

Also Published As

Publication number Publication date
EP0571806B1 (de) 1996-06-05
ITTO920450A1 (it) 1993-11-26
DE69302962T2 (de) 1996-10-10
ITTO920450A0 (it) 1992-05-26
ES2089632T3 (es) 1996-10-01
IT1257197B (it) 1996-01-10
DE69302962D1 (de) 1996-07-11

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