EP0556776B1 - Dishwashing machine with washing liquid collecting sump - Google Patents

Dishwashing machine with washing liquid collecting sump Download PDF

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Publication number
EP0556776B1
EP0556776B1 EP93102405A EP93102405A EP0556776B1 EP 0556776 B1 EP0556776 B1 EP 0556776B1 EP 93102405 A EP93102405 A EP 93102405A EP 93102405 A EP93102405 A EP 93102405A EP 0556776 B1 EP0556776 B1 EP 0556776B1
Authority
EP
European Patent Office
Prior art keywords
sump
mouth
dish
coupling means
washing
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.)
Expired - Lifetime
Application number
EP93102405A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0556776A1 (en
Inventor
Carlo Frairia
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.)
Whirlpool EMEA SpA
Original Assignee
Merloni Elettrodomestici 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 Merloni Elettrodomestici SpA filed Critical Merloni Elettrodomestici SpA
Publication of EP0556776A1 publication Critical patent/EP0556776A1/en
Application granted granted Critical
Publication of EP0556776B1 publication Critical patent/EP0556776B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • A47L15/4214—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
    • A47L15/4246—Details of the tub

Definitions

  • the present invention relates to a dish-washing machine comprising a washing liquid collection sump arranged at the bottom of a washing chamber, said sump being fixed to a mouth defined in said chamber bottom.
  • dish-washing machines are supplied with a chamber, generally realised in stainless steel, at the bottom of which a sump for collecting the washing water is fixed.
  • the bottom of the washing chamber has on the contrary a slightly drawn form with an opening being generally circular, under which a separate sump is fixed; over said opening, and therefore in correspondence with the superior part of the collection sump, a filter is arranged that provides for detaining the impurities of the washing liquid; consequently the water sprayed by the rotating collectors, after having hit the dishes and removed the residues, falls to the bottom of the washing chamber and reaches the sump subjected to a filtering action; from the sump an appropriate pump then provides for re-conveying the water to the rotating collectors, and so on until termination of the washing phase.
  • the collection sump of the washing liquid is realised in a plastic material, being of a single piece; the superior portion of the sump, i.e. that arranged immediately under the filter, has a substantially cylindrical form and has the main function of collecting the washing liquid; the lower part of the sump has however a complex structure and has the function of integrating several functional components (for instance the air trap) and the unions for the washing and drainage pumps.
  • the fixing of the collection sump of the water to the bottom of the washing chamber is realised by way of at least one external metallic strap or by way of a series of screws arranged along the circumference of the superior part of the sump, with appropriate water-tight seals.
  • a lip is realised that defines an engagement seat for fixing the superior portion of the collection sump.
  • the sump is fitted from below to the drawn part, so as that the base of the chamber and superior portion of the sump are fixed; to the exterior of the joint of the two pieces an appropriate water-tight seal is arranged and a metallic strap is closed around the such seal, so as to form an ensemble between the seal, the drawn bottom of the chamber and the cylindrical wall of the sump.
  • Such type of fixing has the drawback of requiring a complex manual action, at least for the fixing and closing of the metallic strap.
  • the opening present in the part being slightly drawn on the base of the chamber has a substantially L shaped edge, while the superior cylindrical portion of the sump has a series of holes arranged along the circumference for housing the fixing screws.
  • the sump is mounted by inserting it from above in the opening of the base of the chamber, until the superior portion of the sump rests on the L shaped edge of the base with a seal being interposed.
  • the sump is fixed from below to the slightly drawn part of the base of the chamber; the sump has in its superior edge a series of seats, along its circumference, for screws that are tightened from the external side of the base of the chamber; between the steel sheet of the base of the chamber and the superior edge of the sump a water-tight seal is naturally provided; in this case, however, the screws create an ensemble between the edge of the sump, the seal and the base of the chamber.
  • the fixing must in fact be manually realised, for tightening the various screws arranged along the circumference, even the automation of this kind of fixing, although possible, would be very complex, due to the requirements of precision necessary.
  • the manual fixing is rendered difficult, in that the technician has to carry out particular movements of the sump, for instance inclining it, so as to make the lower part, to which the components have been preassembled, pass the opening of the base of the chamber.
  • the aim of the present invention is that of solving the mentioned drawbacks and in particular to indicate a dish-washing machine in which the fixing of the collection sump to the bottom of the washing chamber can be realised in a simple and rapid manner and that, even in the presence of preassembled functional components on said sump, it can be completely and easily automated.
  • a further aim of the invention is that of indicating a dish-washing machine in which the washing liquid collection sump be in part incorporated in the base of the chamber of stainless steel and in part realised in plastic.
  • Such aims are reached according to the invention by way of a dish-washing machine comprising a washing liquid collection sump having the characterizing features of the annexed claim 1, and by a method for fixing a washing liquid collection sump providing the steps of the annexed claim 10.
  • figure 1 alone represents a partial and schematic section of the lower part of a dish-washing machine according to the invention.
  • the reference numbers 1 and 2 respectively indicate the skirt (i.e. the lateral and rear walls) and the bottom of the washing chamber in stainless steel of the dish-washing machine according to the invention.
  • the base 2 of the chamber has a peripheral zone 3 being slightly drawn and a central zone being deeply drawn, i.e. shaped in a way to form a substantially cylindrical portion, indicated with 4; on the bottom of said cylindrical portion a circular opening is obtained, having a lip or edge of the stainless sheet being slightly curved towards the interior of the opening, so as to form a mouth also being cylindrical; such mouth is indicated with reference number 5.
  • the base of the chamber 2 further defines a seat for a filter of the washing liquid 6, schematically represented and in part with a dotted line.
  • Reference number 7 indicates a piece of plastic material being resistant to high temperatures, for example moulded polypropylene, that is fixed, as will be described in the following, to the mouth 5 defined by the opening of portion 4.
  • the piece 7 constitutes only the lower section of a sump of the known type, i.e. the part that incorporates the functional elements, such as the air trap and the attachments for the pumps and the water mains; in the case illustrated in figure 1 the superior part of the sump is in fact constituted by the cylindrical portion 4 of the base of the chamber 2, that accomplishes therefore the collecting of the washing liquid.
  • the terminal part 8 of the piece 7, destined to be fixed to the mouth 5 of the base of the chamber 2, has a substantially cylindrical form; in the superior edge of the terminal part 8 a seat for the seal watertight is obtained, indicated with 9.
  • prominent teeth obtained during the moulding operation of piece 7 are indicated (one of which being indicated with a dotted line); such prominent teeth 10, that can be for example four, are arranged along the circumference of the internal wall of piece 7, at a lower level respect the seat of seal 9.
  • a ring is indicated, also being realised in a plastic material resistant to high temperatures.
  • Such ring 11 is circular, and has a diameter and a form that allows it to be inserted from above in the cylindrical portion 4 of the base of the chamber 2, up to the mouth 5 realised in the lower part of the chamber.
  • the ring 11 comprises hooks 12 on its lateral external surface, being of a number corresponding to the teeth 10, in which seats 13 are defined destined to be coupled with teeth 10.
  • Both the teeth 10 and the seats 13 of the hooks 12 have a raisers, so as to favour the mutual coupling (note the centre of the figure); furthermore, in the illustrated case, the lower surface of the teeth 10, i.e. that which comes into contact with the seats 13, is at least in part inclined, so as that the more the ring 11 is rotated the more the clamping and the assembly force of the group is increased.
  • the terminal part 8, in which the seal 9 is preassembled is fitted from below on the mouth 5 realised in the extreme part of the portion 4 of the base of the chamber 2; the ring 11 is however inserted from above in such portion 4.
  • the actual fixing is obtained by imparting a rotation (in the specific case anti-clockwise) of the ring 11, so as that the teeth 10 become engaged in the seats 13 defined by the hooks 12, realising therefore a coupling of the bayonet joint type, of a progressive closing force.
  • the seal 9 results in being interposed and pressed between the terminal part 8 and the sheet of the mouth 5; the sheet of the mouth 5 is in turn pressed towards the exterior of the ring 11.
  • the fixing operation therefore results in being very simple, even from the possible automation point of view.
  • the cylindrical portion 4 of the base of the chamber 2 can advantageously be utilised for housing a heating resistance of the washing liquid, for instance of two circular turns, arranged under the filter 6.
  • the characteristics of the dish-washing machine subject of the present invention result in being clear; as do its advantages, mainly represented in that the water-tight fixing of the sump to the base of the chamber can be achieved in a very simple and rapid manner, even in the presence of preassembled components to the sump; the singular fixing operations are actually elementary and reduce to a minimum the possibility of errors; the assembly of the sump can therefore be completely and easily automated.
  • the type of fixing of the sump of the described dish-washing machine subject of the present invention can without any problems be employed also for the fixing of sumps of the known type, i.e. realised in a single piece of plastic material; for such aims it is in fact sufficient that the bottom of the washing chamber defines a mouth (as is normally the case in all actual dish-washing machines): to the exterior of said mouth the sump will be fixed from below, equipped with appropriate prominent teeth, while to the interior of the same mouth the fixing ring equipped with coupling seats for said teeth shall be inserted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Washing And Drying Of Tableware (AREA)
  • Sanitary Device For Flush Toilet (AREA)
  • Cleaning By Liquid Or Steam (AREA)
EP93102405A 1992-02-19 1993-02-16 Dishwashing machine with washing liquid collecting sump Expired - Lifetime EP0556776B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO920131A IT1256526B (it) 1992-02-19 1992-02-19 Macchina lavastoviglie con pozzetto di raccolta del liquido di lavaggio fissato al fondo vasca tramite mezzi ad incastro.
ITTO920131 1992-02-19

Publications (2)

Publication Number Publication Date
EP0556776A1 EP0556776A1 (en) 1993-08-25
EP0556776B1 true EP0556776B1 (en) 1997-08-13

Family

ID=11410075

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93102405A Expired - Lifetime EP0556776B1 (en) 1992-02-19 1993-02-16 Dishwashing machine with washing liquid collecting sump

Country Status (4)

Country Link
EP (1) EP0556776B1 (es)
DE (1) DE69312979T2 (es)
ES (1) ES2106900T3 (es)
IT (1) IT1256526B (es)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1282922B1 (it) * 1995-01-09 1998-04-01 Zanussi Elettrodomestici Lavastoviglie con mezzi elettrici di riscaldamento
EP2233059B1 (en) 2009-03-27 2015-07-08 Electrolux Home Products Corporation N.V. Dishwasher
ES2422592T3 (es) * 2009-03-27 2013-09-12 Electrolux Home Prod Corp Lavavajillas

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE237841C (es) * 1975-10-01
US4221547A (en) * 1978-09-18 1980-09-09 White Consolidated Industries, Inc. Resilient mount for dishwasher motor and pump assembly
AU8288382A (en) * 1981-05-13 1982-11-18 Smeg Elettrodomestici S.P.A. Dishwashing machine tank well
DE3229731A1 (de) * 1982-08-10 1984-02-16 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Geschirrspuelmaschine
DE8500663U1 (de) * 1985-01-12 1986-05-07 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Geschirrspülmaschine mit einer Ablaufwanne am Spülbehälterboden
US5118254A (en) * 1991-05-31 1992-06-02 Maytag Corporation Apparatus and method for dishwasher pump mounting

Also Published As

Publication number Publication date
DE69312979T2 (de) 1998-02-26
IT1256526B (it) 1995-12-07
ITTO920131A1 (it) 1993-08-19
EP0556776A1 (en) 1993-08-25
DE69312979D1 (de) 1997-09-18
ES2106900T3 (es) 1997-11-16
ITTO920131A0 (it) 1992-02-19

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