EP0580563A1 - Sicherheitsvorrichtung für Geschirrspüler, insbesondere zum Messen von grossem Wasserverbrauch - Google Patents

Sicherheitsvorrichtung für Geschirrspüler, insbesondere zum Messen von grossem Wasserverbrauch Download PDF

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Publication number
EP0580563A1
EP0580563A1 EP93830318A EP93830318A EP0580563A1 EP 0580563 A1 EP0580563 A1 EP 0580563A1 EP 93830318 A EP93830318 A EP 93830318A EP 93830318 A EP93830318 A EP 93830318A EP 0580563 A1 EP0580563 A1 EP 0580563A1
Authority
EP
European Patent Office
Prior art keywords
duct
float
tank
water
communication
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.)
Withdrawn
Application number
EP93830318A
Other languages
English (en)
French (fr)
Inventor
Roberto Bertazzoni
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.)
Smeg SpA
Original Assignee
Smeg 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 Smeg SpA filed Critical Smeg SpA
Publication of EP0580563A1 publication Critical patent/EP0580563A1/de
Withdrawn legal-status Critical Current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
    • A47L15/42—Details
    • A47L15/4244—Water-level measuring or regulating arrangements

Definitions

  • the present invention concerns the safety devices for dishwashing machines and in particular refers to a safety device for dishwashers for sensing anomalies in the water consumption.
  • a number of devices are known suitable to sense an excessive accumulation of water in the tank of a dishwasher and to intervene, as a consequence thereof, by stopping the running of the machine.
  • a device including a duct in communication with the bottom of the dishwasher tank and whose upper end, located at a height corresponding with the maximum allowed water level, communicates through a siphon with an adjacent chamber provided with a sensor for detecting the pressure of the air contained therein.
  • An excessive accumulation of water in the dishwasher tank implies the increase of the water level in said duct, and at the reaching of the emergency level a certain amount of water flows into said chamber compressing the air therein and causing, through the pressure sensor, the stop of the dishwasher.
  • the object of the present invention is therefore to provide a device capable of detecting and reporting a significant increase in the water consumption of a dishwasher before such an anomaly generates an emergency condition, and which is also capable of preventing the reactivation of the machine, after a possible emergency stop, until the manual intervention of an operator.
  • the device according to the present invention has the advantage of providing, in one of its embodiments, a continuous flow of clean water on the float which is a fundamental part of the device, so as to avoid the formation of encrustations and the like which could alter the functioning of the float.
  • the dishwasher tank 1 is connected to a tube 2, of any kind suitable for the purpose, whose upper end is inserted on a duct 3 which is part of a shaped hollow body 4.
  • the duct 3 has its mouth located at a height corresponding to a level 5 which is the safety level for the water contained in the dishwasher tank 1.
  • a float 6 is inserted inside duct 3 and vertically movable according to the water level therein.
  • the hollow body 4 further includes a duct 9 through which clean water coming from the supply system flows over float 6.
  • the hollow body 4 finally includes a chamber 10 provided with two outlets 10a, 10b and an inlet 10c, located below level 5, wherein a duct 11 is inserted whose mouth is located at the same height as the one of duct 3 and in communication therewith.
  • the outlet 10b of chamber 10 is preferably connected to a drainpipe 12 whose opposite end is closed by a plug 13 whose function will be explained later on.
  • the outlet 10a of chamber 10 is connected, on the contrary, to a safety manostat 14 and to an electropneumatic valve 15.
  • the manostat 14 is capable of activating a discharge pump (not shown) for the emergency emptying of tank 1, while valve 15 is capable of stopping the water supply to the dishwasher.
  • the dishwasher inlet manostat (not shown) controls the water supply to the machine and the level inside tank 1 is such as to keep float 6 at a height lower than switch 7.
  • the float 6 is partially immersed in "dirty” water since the latter comes from tank 1, but it is continuously sprinkled by the clean water flowing down through duct 9. This flow of clean water prevents the accumulation on float 6 of washing residues forming encrustations which would weigh it down thus altering its functionality or could even block it.
  • manostat 14 and valve 15 can not return to the condition corresponding to normal functioning of the dishwasher until the user, or preferably a technician, sees to the elimination of the excess water from chamber 10 by acting on plug 13, thus restoring the starting pressure value for the air contained therein.
  • a second embodiment of the device according to the present invention which allows to get round a possible non-working of the safety manostat 14 and of valve 15.
  • the non-working of manostat 14 and of valve 15 consequently causes the further increase of the water level, in particular inside the hollow body 4.
  • said body also includes an emergency duct 16 whose mouth is located at a second safety level 17 higher than the first safety level 5.
  • the second safety level 17 substantially can not get above it and is conveyed, through duct 16 and a tube 18 connected thereto, to a collecting tank 19 provided with a second float 20 which causes, when it is raised by the water discharged therein, the commutation of a microswitch 21 which controls the stopping of the water supply to the dishwasher.
  • hollow body 4 may be made in any material and with any shape suitable for the purpose.
  • a safety device with the above-described functionalities may also be obtained by assembling separate members to form a structure similar to that of the hollow body 4.
  • the float 6 may be of any kind suitable for the described purpose and switch 7 may be of any kind suitable to detect the position of said float inside duct 3 of the device.
  • the use of two or more switches 7 and of respective signals 8 may also be supposed in order to sense subsequent positions of float 6, while it is clear that plug 13 may be replaced by any member assuring the same functionality.
  • the float 6 and respective switch 7 could also be located inside tank 1.
  • float 6 and switch 7 it is also possible to completely eliminate float 6 and switch 7 by replacing them with a further chamber connected to a manostat, similar to chamber 10 connected to manostat 14.
  • This additional chamber may be adjacent to duct 3 and in communication therewith, or it may be directly inside tank 1; in both instances the increase of water level would be detected by the manostat which would activate signals 8.

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  • Washing And Drying Of Tableware (AREA)
EP93830318A 1992-07-22 1993-07-21 Sicherheitsvorrichtung für Geschirrspüler, insbesondere zum Messen von grossem Wasserverbrauch Withdrawn EP0580563A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI921768A IT1256122B (it) 1992-07-22 1992-07-22 Dispositivo di sicurezza per lavastoviglie in particolare per il rilevamento dell'elevato consumo di acqua
ITMI921768 1992-07-22

Publications (1)

Publication Number Publication Date
EP0580563A1 true EP0580563A1 (de) 1994-01-26

Family

ID=11363707

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93830318A Withdrawn EP0580563A1 (de) 1992-07-22 1993-07-21 Sicherheitsvorrichtung für Geschirrspüler, insbesondere zum Messen von grossem Wasserverbrauch

Country Status (2)

Country Link
EP (1) EP0580563A1 (de)
IT (1) IT1256122B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1532917A1 (de) * 2003-11-21 2005-05-25 Electrolux Home Products Corporation N.V. Geschirrspülmaschine mit verbesserten Lichtindikatoren
CN104545748A (zh) * 2014-12-31 2015-04-29 宁波方太厨具有限公司 水槽式清洗机的溢水保护装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1192125A (en) * 1968-09-25 1970-05-20 Philips Electronic Associated Improvements in or relating to Dish-Washing Machines
GB1267737A (en) * 1968-05-15 1972-03-22 Zanussi A Spa Industrie An improved dishwashing or other washing machine
US3986372A (en) * 1976-01-16 1976-10-19 Whirlpool Corporation Appliance programmer including a safety circuit
EP0017453A1 (de) * 1979-04-02 1980-10-15 Eaton Corporation Waschvorrichtung und Mittel zum Fühlen des Flüssigkeitsstandes dafür
EP0028067A1 (de) * 1979-09-12 1981-05-06 Kenwood Manufacturing Company Limited Waschmaschine mit Verstopfungsanzeige für den Abfluss
EP0439397A1 (de) * 1990-01-26 1991-07-31 Esswein S.A. Wasserstandsregelvorrichtung in einer Haushaltsmaschine und Maschine ausgerüstet mit einer solchen Vorrichtung
EP0461722A1 (de) * 1990-06-15 1991-12-18 Bauknecht Hausgeräte GmbH Zulaufmengensteuerung für Spül- und Waschgeräte
WO1992004855A1 (de) * 1990-09-18 1992-04-02 Bosch-Siemens Hausgeräte Gmbh Sicherheitsvorrichtung für wasserführende haushaltgeräte

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1267737A (en) * 1968-05-15 1972-03-22 Zanussi A Spa Industrie An improved dishwashing or other washing machine
GB1192125A (en) * 1968-09-25 1970-05-20 Philips Electronic Associated Improvements in or relating to Dish-Washing Machines
US3986372A (en) * 1976-01-16 1976-10-19 Whirlpool Corporation Appliance programmer including a safety circuit
EP0017453A1 (de) * 1979-04-02 1980-10-15 Eaton Corporation Waschvorrichtung und Mittel zum Fühlen des Flüssigkeitsstandes dafür
EP0028067A1 (de) * 1979-09-12 1981-05-06 Kenwood Manufacturing Company Limited Waschmaschine mit Verstopfungsanzeige für den Abfluss
EP0439397A1 (de) * 1990-01-26 1991-07-31 Esswein S.A. Wasserstandsregelvorrichtung in einer Haushaltsmaschine und Maschine ausgerüstet mit einer solchen Vorrichtung
EP0461722A1 (de) * 1990-06-15 1991-12-18 Bauknecht Hausgeräte GmbH Zulaufmengensteuerung für Spül- und Waschgeräte
WO1992004855A1 (de) * 1990-09-18 1992-04-02 Bosch-Siemens Hausgeräte Gmbh Sicherheitsvorrichtung für wasserführende haushaltgeräte

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 014, no. 299 (C-733)1990 & JP-A-02 098 332 ( MITSUBISHI ELECTRIC CORP. ) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1532917A1 (de) * 2003-11-21 2005-05-25 Electrolux Home Products Corporation N.V. Geschirrspülmaschine mit verbesserten Lichtindikatoren
CN104545748A (zh) * 2014-12-31 2015-04-29 宁波方太厨具有限公司 水槽式清洗机的溢水保护装置

Also Published As

Publication number Publication date
ITMI921768A1 (it) 1994-01-22
ITMI921768A0 (it) 1992-07-22
IT1256122B (it) 1995-11-29

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