EP0591774A1 - Machine à laver la vaisselle avec chauffe-eau continu - Google Patents

Machine à laver la vaisselle avec chauffe-eau continu Download PDF

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Publication number
EP0591774A1
EP0591774A1 EP93115366A EP93115366A EP0591774A1 EP 0591774 A1 EP0591774 A1 EP 0591774A1 EP 93115366 A EP93115366 A EP 93115366A EP 93115366 A EP93115366 A EP 93115366A EP 0591774 A1 EP0591774 A1 EP 0591774A1
Authority
EP
European Patent Office
Prior art keywords
dishwasher
water
washing
water heater
heater
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
EP93115366A
Other languages
German (de)
English (en)
Other versions
EP0591774B1 (fr
Inventor
Ulrich Hettenhausen
Wilfried Hüttemann
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
Publication of EP0591774A1 publication Critical patent/EP0591774A1/fr
Application granted granted Critical
Publication of EP0591774B1 publication Critical patent/EP0591774B1/fr
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
    • A47L15/4285—Water-heater arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/12—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
    • F24H1/14—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form
    • F24H1/142—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form using electric energy supply

Definitions

  • the subject matter of the invention relates to a dishwasher with a washing container and a plurality of spray arms in the upper and lower washing levels, which are fed by the circulating washing water of an upstream circulating pump, an electric water heater being provided as a heating device for heating the circulating washing liquid, which is located outside the washing container between the Dishwasher and an adjacent outer housing wall of the dishwasher is arranged in the line path to the upper spray arms in the flushing water circulation line.
  • Such a dishwasher with a water heater is known for example from DE-AS 1 226 248.
  • a separate pipe intermediate piece is formed as a continuous-flow heater in the conduit path between the upper spray arm and the circulation pump in the region of a washing container side wall, which accommodates a U-shaped tubular heating element in its interior.
  • the tubular heater is in direct contact with the rinsing liquid to be heated and therefore, on the one hand, represents an obstacle to the flow of the rinsing liquid to be circulated and, on the other hand, has the disadvantage of a high lime scale in washing programs with temperatures above 55 ° Celsius, which disrupts the heat transfer and accepts a considerable loss in performance must become. The result is longer program times for dishwashing.
  • the continuous-flow heater is part of the pipe system for the rinse water circulation, the heating device in the form of a tubular heater being wound on the outside of a piece of pipe and connected to it in a heat-conducting manner by soldering or welding.
  • the short pipe section that branches off from the bottom of the washing container and is connected to the circulation pump on the suction side and can only be checked from the underside of the dishwasher is used as the pipe section.
  • the required heating capacity of the instantaneous water heater can often not be achieved or only with difficulty due to the small installation space. Undersizing of the heating must therefore be compensated for by longer program switch-on times for rinsing water heating, which also increases the running time of the rinsing program.
  • a heating device in the lower area of the device is inconvenient to install and to repair or to check. The invention is also intended to remedy this.
  • the invention has for its object to provide a instantaneous water heater for dishwashers in a space-saving arrangement and inexpensive simple construction, which works in an energy-saving manner, is easily replaceable in the event of a repair, and can be easily adapted to different connected load ratings.
  • the arrangement of the instantaneous water heater on the outside of the washing container in the line to the upper spray arms and its parallel orientation to the washing container wall creates, on the one hand, further installation space for additional electrical or mechanical, e.g. B. the safety of the device serving components.
  • additional electrical or mechanical e.g. B. the safety of the device serving components.
  • the dead space between the rinsing tank and the outer housing wall of the device which is usually only filled with insulating material is sensibly exploited.
  • the support component common to the flow tube and the tubular heating element, in the form of a straight, elongated extrusion enables simple construction and fastening or assembly of the flow heater.
  • the formation in the form of a plug-in connection is advantageous.
  • Another advantage is that the instantaneous water heater can be easily adapted to different outputs.
  • the advantageous arrangement of one or more tubular heating elements in the extruded part with separately connectable line connections enables optimal connection values to be achieved, so that, for example, one and the same instantaneous water heater can only be used with different wiring or number of tubular heating elements for different device types with different power levels.
  • a dishwasher designated by (1) in Fig. 1 has a washing container (2) and several spray arms (3, 4, 5) between crockery baskets (6, 7, 8) in different lower and upper washing levels.
  • the spray arms (3, 4, 5) are fed by the circulating rinse water of an upstream circulation pump (9).
  • an electric instantaneous water heater (10) is provided as a heating device in the circulation pump circuit outside the rinsing container (2) in the line path from the circulation pump (9) only to the upper spray arms (4, 5) in the rinsing water circulation line.
  • This room could e.g. B. by a cutout in the rinsing tank insulation (15) or by omitting the insulation in this area.
  • the flow heater (10) installed in this area is designed as a flow pipe (17) which is electrically heated from the outside and guides the rinsing liquid in a predominantly elongated and straight form.
  • a preferred type of training is that of a water heating element customary in electric coffee machines or the like, which consists of a flow pipe (17) made of stainless steel with the outside of the pipe and parallel to this, separate tubular heating elements (18), heating wires or the like.
  • the continuous-flow heater (10) is an elongated continuous tube (17), electrically heated from the outside via one or more separate tubular heating elements (18), for the washing liquid to be heated on a straight carrier component (parallel to a washing-container wall (2a)) 11) trained.
  • the tubular heating elements (18) are also arranged parallel to the longitudinal direction of the flow tube (17) on this support component (11).
  • the flow pipe (17) is provided at the end with rinsing water connections (19) for detachable connection to the rinsing water circulation line, and the tubular heating elements (18) have separately connectable electrical line connections (20), each of which is slightly bent at the end of the support component (11) and thus do not heat the flow pipe ends (21) and keep them free for installation in the flushing water circulation line.
  • the carrier component (11) is an extruded part which has a through bore (24) running in the longitudinal direction of the pressed part for the positive reception and non-positive mounting of the separate flow tube (17) for the washing liquid to be heated.
  • the flow tube (17) is pressed into this through-bore (24), the inner wall of the bore for heat conduction lying tightly against the outer tube jacket.
  • the flow tube (17) is heated on the outside by two tubular heating elements (18), each of which is provided with separately connectable electrical line connections (20) for realizing predetermined or also selectable connection values (connecting bridge 22), the tubular heating elements (18) being outside the flow tube (17 ) are pressed in the holes (25) of the extruded part that run parallel to the through hole (24). Additional bores (25) for additional tubular heating elements (18) can also be provided in the extruded part.
  • the instantaneous heater (10) provided between the washing compartment (2) and the adjacent outer housing wall (13) of the dishwasher is in the receiving space (12) arranged interchangeably, for which purpose the continuous tube (17) in each case has unheated tube ends (21) which are extended beyond the extruded part and which are provided with the detachable rinsing water connections (19).
  • the continuous tube (17) in each case has unheated tube ends (21) which are extended beyond the extruded part and which are provided with the detachable rinsing water connections (19).
  • the plastic connection of the spray arm line and the rubber connecting hose to the circulation pump (9) can be plugged on without any problems and fix.
  • the advantageously used non-rusting material for the continuous pipe (17) counteracts limescale deposits on the inside walls of the pipe, so that no loss of performance occurs.
  • the end-side rinsing water connections (19) and / or the electrical line connections (20) of the instantaneous water heater (10) are designed as plug-in or screwable connections. This also enables simple assembly and disassembly of the instantaneous water heater (10) with the flushing water circulation line.
  • Placing the instantaneous water heater (10) preferably on a side wall of the rinse tank (2a), see (Fig. 3) in the straight part of the spray arm supply line (16) or rinse water circulation line in the dishwasher housing (14) offers the simplest installation route if the adjacent outer housing wall ( 13) is detachably connected to the device at the same time.
  • the carrier component (11) consists of a highly thermally conductive material, preferably aluminum, brass or metal alloys of this type.
  • An ideal heat transfer between the tubular heating elements (18) and the flow tube (17) for the rinsing liquid is achieved due to the aluminum or brass material, which is also advantageous in terms of production technology. This material can also be easily connected to the flow tube (17) and to the radiators in a positive and non-positive manner.
  • the length of the flow tube (17) is at a conventional heating power of the tubular heater (18) of z. B. 3 kW - this corresponds, for example, to the performance of tubular radiators (18) which are known per se and are installed inside the washing compartment (2) - at least 350 mm in length for the part to be heated (extruded part length).
  • the length can be increased to 600 mm for any power reserves or for selectable different outputs.
  • the arrangement of the instantaneous water heater (10) behind the lower spray arm (3) in the preferably straight line path to the upper spray arms (4, 5) between the washing container (2) and the outer housing creates space in the lower device area for additional safety devices, such as leakage water trays, floats and The like. And avoids installation problems for the circulation pump (9), the softening device (E), the fresh water connection (F) and for the drain pump (L); the drain (A) including any pressure switches (D) and valves (V).
  • the above-mentioned receiving space (12) in the dishwasher housing (14) according to FIG. 2 can preferably be designed as an assembly chamber for the water heater (10) that can be reached from above, below or from the side of the dishwasher (1) with the cover or side panel removed.
  • the water heater (10) is thermally insulated and also electrically insulated.
  • the extruded profile part is detachably fastened to a washing compartment wall (2a), preferably to the washing compartment side wall, via a snap-in connection (23).
  • the instantaneous water heater (10) could also be installed on the rear wall of the washing container or on the top of the washing container below the adjacent, also removable outer housing wall (13).
  • the instantaneous water heater (10) is provided with thermostatic devices in a manner not known per se. It is also conceivable for the instantaneous water heater (10) to be detachably attached to the outside of the rinsing container (2) in heat-conducting contact. This indirect rinsing water heating brings about an additional sensible and energy-saving use of the radiant heat of the rinsing water heater, but the heat insulation with respect to the adjacent outer housing wall (13) could still be retained. It is also possible to design the receiving space (12) for the instantaneous water heater (10) to be completely thermally insulated.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Washing And Drying Of Tableware (AREA)
EP93115366A 1992-09-23 1993-09-23 Machine à laver la vaisselle avec chauffe-eau continu Expired - Lifetime EP0591774B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4231830 1992-09-23
DE4231830 1992-09-23

Publications (2)

Publication Number Publication Date
EP0591774A1 true EP0591774A1 (fr) 1994-04-13
EP0591774B1 EP0591774B1 (fr) 1997-08-27

Family

ID=6468625

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93115366A Expired - Lifetime EP0591774B1 (fr) 1992-09-23 1993-09-23 Machine à laver la vaisselle avec chauffe-eau continu

Country Status (3)

Country Link
EP (1) EP0591774B1 (fr)
DE (2) DE4332246A1 (fr)
ES (1) ES2108796T3 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0720830A3 (fr) * 1995-01-09 1996-11-13 Electrolux Zanussi Elettrodome Lave-vaisselle avec éléments de chauffe électriques
EP0744150A1 (fr) * 1995-05-26 1996-11-27 ELECTROLUX ZANUSSI ELETTRODOMESTICI S.p.A. Machine à laver la vaisselle avec dispositif électrique de chauffage
DE19852569A1 (de) * 1998-11-13 2000-05-18 Miele & Cie Umwälzpumpe, insbesondere für wasserführnde Haushaltgeräte
EP1029501A1 (fr) * 1999-02-15 2000-08-23 CANDY S.p.A. Machine à laver la vaisselle à chauffage radiant
EP1369075A1 (fr) * 2002-06-05 2003-12-10 CANDY S.p.A. Machine à laver la vaisselle
EP2348944B1 (fr) 2008-09-25 2017-12-20 E.G.O. Elektro-Gerätebau Gmbh Pompe pour fluides

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017108349B4 (de) 2016-05-23 2023-03-09 Miele & Cie. Kg Wasch- oder Spülmaschine mit einer Heizeinrichtung zur Aufheizung der Wasch- oder Spülflüssigkeit

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB384090A (en) * 1931-01-26 1932-12-01 Eloy Cignolo Apparatus for heating gases by electricity
DE2454920A1 (de) * 1974-11-20 1976-05-26 Tuerk & Hillinger Kg Elektrischer durchlauferhitzer
DE3534754A1 (de) * 1985-09-28 1987-04-02 Bauknecht Hausgeraete Elektrischer durchlauferhitzer fuer haushaltgeraete
EP0299343A1 (fr) * 1987-07-07 1989-01-18 I.R.C.A. S.p.a. Industria Resistenze Corazzate e Affini Elément de chauffage pour appareils électriques domestiques

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB384090A (en) * 1931-01-26 1932-12-01 Eloy Cignolo Apparatus for heating gases by electricity
DE2454920A1 (de) * 1974-11-20 1976-05-26 Tuerk & Hillinger Kg Elektrischer durchlauferhitzer
DE3534754A1 (de) * 1985-09-28 1987-04-02 Bauknecht Hausgeraete Elektrischer durchlauferhitzer fuer haushaltgeraete
EP0299343A1 (fr) * 1987-07-07 1989-01-18 I.R.C.A. S.p.a. Industria Resistenze Corazzate e Affini Elément de chauffage pour appareils électriques domestiques

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0720830A3 (fr) * 1995-01-09 1996-11-13 Electrolux Zanussi Elettrodome Lave-vaisselle avec éléments de chauffe électriques
EP0744150A1 (fr) * 1995-05-26 1996-11-27 ELECTROLUX ZANUSSI ELETTRODOMESTICI S.p.A. Machine à laver la vaisselle avec dispositif électrique de chauffage
DE19852569A1 (de) * 1998-11-13 2000-05-18 Miele & Cie Umwälzpumpe, insbesondere für wasserführnde Haushaltgeräte
EP1029501A1 (fr) * 1999-02-15 2000-08-23 CANDY S.p.A. Machine à laver la vaisselle à chauffage radiant
EP1369075A1 (fr) * 2002-06-05 2003-12-10 CANDY S.p.A. Machine à laver la vaisselle
EP2348944B1 (fr) 2008-09-25 2017-12-20 E.G.O. Elektro-Gerätebau Gmbh Pompe pour fluides
EP2348944B2 (fr) † 2008-09-25 2022-10-26 E.G.O. Elektro-Gerätebau Gmbh Pompe pour fluides

Also Published As

Publication number Publication date
ES2108796T3 (es) 1998-01-01
DE59307198D1 (de) 1997-10-02
DE4332246A1 (de) 1994-03-24
EP0591774B1 (fr) 1997-08-27

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