EP1532919B1 - Lave-vaiselle et procédé avec un appareil pour chauffer un liquide de travail - Google Patents

Lave-vaiselle et procédé avec un appareil pour chauffer un liquide de travail Download PDF

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Publication number
EP1532919B1
EP1532919B1 EP04105999.9A EP04105999A EP1532919B1 EP 1532919 B1 EP1532919 B1 EP 1532919B1 EP 04105999 A EP04105999 A EP 04105999A EP 1532919 B1 EP1532919 B1 EP 1532919B1
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EP
European Patent Office
Prior art keywords
dishwasher
pit
heating apparatus
heating
silk
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.)
Not-in-force
Application number
EP04105999.9A
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German (de)
English (en)
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EP1532919A1 (fr
Inventor
Giuseppe Marchitto
Nicola Gaudiano
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Whirlpool EMEA SpA
Original Assignee
Indesit Co SpA
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Publication date
Application filed by Indesit Co SpA filed Critical Indesit Co SpA
Priority to PL04105999T priority Critical patent/PL1532919T3/pl
Publication of EP1532919A1 publication Critical patent/EP1532919A1/fr
Application granted granted Critical
Publication of EP1532919B1 publication Critical patent/EP1532919B1/fr
Not-in-force 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
    • 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 
    • D06F39/04—Heating arrangements

Definitions

  • the present invention relates to an apparatus for heating a working fluid circulating within a hydraulic circuit of a washing machine, a method for manufacturing and assembling said apparatus, and a washing machine comprising said heating apparatus and implementing said method.
  • the inventive idea is applied to household washing machines, in particular a dishwasher or a laundry washing machine; in this case, the working fluid is water taken from the main, eventually washing agents to be added.
  • Every washing machine comprises a hydraulic circuit wherein a working fluid circulates which, during at least one operating phase of the machine, is heated by means of suitable devices.
  • a hydraulic circuit of a dishwasher which uses water supplied from the main as a working fluid for crockery washing.
  • Said hydraulic circuit is generally composed of:
  • document EP1201933 relates to a pump, especially for washing machines, comprising a housing and a heating device for the continuous heating of a fluid, said heating device forming a part of the side wall of the housing.
  • Document DE20208545U1 discloses a household appliance comprising a liquid circuit and a pump, which has a pump housing.
  • Said pump housing contains a heating element, which is provided for heating the washing liquid and which is inserted in a cavity of said housing.
  • Document EP0352499 relates to a heating device for washing and/or drying machines for laundry, comprising a parallelepiped plate made of electrically insulating material having applied to one surface thereof, by the silk screen process or similar procedures, at least one electrical resistor based on electrically conductive metal powders mixed with glass frit.
  • Document DE19844898A1 1 discloses a heating device, in particular for domestic appliances, comprising at least one electric heating element and a contact element which produces the thermal contact between the heating element and the medium to be heated. If we look at the technologies generally used at present for heating working fluids in washing machines, and in particular the water circulating within the hydraulic circuit of a dishwasher, we can substantially identify two categories of devices extensively and generally used for the purpose:
  • Armored resistances which have been used since the very start of the production of these machines, consist of a tubular element that may be heated by Joule effect.
  • Said tubular element can be bent and shaped in various ways in order to provide a length and so a heat exchange area with water as large as possible, in order to transmit as much caloric power as possible by direct contact with the fluid.
  • Armored resistances can be directly positioned in the wash tub close to the pit, and in such a way to be always covered by fluid when they are in the operating condition, i.e. during the water heating phase. In this condition, these resistances have the drawback of taking up considerable room on the tub bottom.
  • the water is heated dynamically within the pipe around which the resistance is wound; therefore the liquid absorbs heat only when, passing through that particular section of the circuit, it comes in contact with the hot pipe, and so for a short time. Besides, there are also heat losses along the outer surface of said pipe. Consequently, it is not possible to transfer a high caloric power to the water.
  • the employment of armored resistances wound around a metal pipe inserted in the hydraulic circuit of a washing machine offers a lower thermal efficiency in respect to, for example, a system with a visible resistance located on the tub bottom.
  • the presence of hot metal pipes represents a further heat source to be suitably insulated from the plastic materials with which said pipes are associated in the assembly, thus presenting a technical complication from this point of view.
  • the second typology of resistances used at present in the art is that of silk-screened resistances, i.e. formed by using a silk-screening technique directly on a compact material, generally a metal material, being said resistances appropriately insulated electrically from said material.
  • Silk-screened resistances are in general applied externally to metal pipes inserted in the hydraulic circuit, as an alternative to the above-described armored resistances.
  • Silk-screened resistances cited in the above applications, have however the same drawbacks as armored resistances in terms of manufacturing complexity and low wash water heating efficiency, which are substantially due to the dynamic-type heating of the water circulating within the circuit.
  • the main aim of the present invention is to solve the above-mentioned problems by providing a washing machine, in particular a dishwasher, comprising an apparatus for heating a working fluid circulating within said machine, as well as an improved method for manufacturing and assembling said apparatus in the same machine of improved typology.
  • a further aim of the present invention is to provide a washing machine comprising an apparatus for heating a working fluid having improved characteristics.
  • an aim of this invention is to provide an efficient and safe heating of the working fluid for a user, e.g. a child, who inexpertly opens the washing machine when the resistance is still hot and therefore potentially harmful.
  • a further aim is to keep the number of components of the washing machine hydraulic circuit as low as possible, thereby simplifying and economizing on the assembly operations on the production line and on the supply and management of the various components.
  • Another aim of the present invention is to provide an apparatus for heating a fluid, or wash water, being as small as possible, in order to obtain an optimum exploitation of the washing machine volume, both within and without the wash tub.
  • a further aim is to implement means for heating wash water, or a working fluid for a generic washing machine, which integrates the functions of a number of components of the washing machine, in order to attain the utmost rationalization and economization of resources.
  • Fig. 1 shows a perspective view of a tub bottom 2 of the dishwasher 1, on the underside of which a pit can be discerned, indicated as a whole with reference number 3, the bottom of which incorporates the heating apparatus A. Also on the bottom and in fluid connection with the inside, the pit 3 has two branches. The first branch, indicated with 3A, is in fluid connection with the suction side of a drain pump 4 of the machine 1, in order to drain away the water from the hydraulic circuit to the outside; the second branch, not shown in the illustration, is in connection with the suction side of a wash pump of the same machine 1.
  • the wash pump outlet is connected, in a known way not detailed here for simplicity's sake, to a first sprayer 6 and a further branch 7, which delivers the wash water to a second sprayer, not detailed here as well for simplicity's sake.
  • the remaining hydraulic circuit of the dishwasher 1 is not illustrated, being widely known in the art. Besides, the hydraulic circuit has already been described in the introductory section of the present description.
  • the figure also shows, underneath the tub bottom 2, a water collecting concave surface 8 terminating in the pit 3, which surface conveys the water contained in the tub toward a hole 9 located centrally with respect to said pit 3.
  • Fig. 2 shows a perspective view of the pit 3 of the tub bottom 2, wherein said pit is sectioned with respect to a longitudinal intermediate plane crossing the tub bottom 2.
  • a filtering element 10 is vertically arranged, centered in the pit 3, starting from the hole 9 being present in the surface 8 of the tub bottom 2.
  • the outer surface of the filtering element 10 is extensively holed so as to create a wide mesh, for the purpose of collecting and filtering crockery residues having large dimensions.
  • a swiveling filter 11 having a substantially cylindrical shape and being tight against both the surface 8 and a horizontal plane 12.
  • Said plane 12 divides the pit 3 internally into two areas, i.e. an upper area 3S and a lower area 31, the latter having the function of collecting the filtered water.
  • the heating apparatus A On the bottom of the pit 3, and more in particular in the lower area 31, there is the heating apparatus A, illustrated in detail in Fig. 3 . It comprises a disk-shaped element or disk 20 being substantially centered with respect to the pit 3.
  • the disk 20 has a thermal exchange surface 20S located on its side 20B, hereafter called "second side".
  • Said disk 20 represents, in particular through its thermal exchange surface 20S, the interface between the wash water, collected in the lower area 31 of the pit 3, and the heating apparatus A. It tends to have such a shape and an extension as to occupy substantially the entire bottom surface of the pit 3 of the dishwasher 1, in order to maximize the heat exchange area and thus increase the caloric power that the apparatus A is capable to exchange through the surface 20S.
  • the above disk-shaped element 20 may however have any other shape, in so far as the size and functionality of the heating apparatus A allow.
  • the particular shape of the disk-shaped element 20 has been chosen to maximize the thermal exchange area in contact with the water, which is in contact with the disk-shaped element 20 when the apparatus A is in the operating position, and compatibly with the necessity of having:
  • the need of arranging the disk 20 of the heating apparatus A on the bottom of the pit 3 is due to the particular conditions and characteristics of the wash water in such a position:
  • the heating apparatus A is incorporated within the bottom of the lower area 31 of the pit 3; this feature is well illustrated in Fig. 2 .
  • the above assembly which is preferably obtained on manufacturing the part forming the pit 3, is accomplished through a process for co-molding the heating apparatus A within said pit 3; at the end of this process, the heating apparatus A is buried in a polymeric matrix or in general in a matrix made of a plastic material, in particular polypropylene or polycarbonate with reinforcement matrixes.
  • the heating apparatus A is put into one of the two half-shells making up the mold for the pit 3, being so positioned that the following injection of the plastic material forming the housing of the pit 3 leaves a whole side of the disk 20 exposed.
  • the injection of the material leaves the second side 20B exposed, specifically the heating surface 20S of said disk 20, i.e. the side opposite to that where the electric resistances 22 are located, as described below.
  • the remaining parts of the heating apparatus A stay buried in the plastic matrix forming the pit 3.
  • Fig. 3 shows a perspective view of the heating apparatus A, which is buried in the mold and therefore in the plastic matrix forming the pit 3 of the dishwasher 1.
  • the disk 20 of the heating apparatus A is shown upside down with respect to the orientation of the disk 20 in Fig.2 .
  • first side 20A facing up, being opposite to the second side 20B from which the thermal exchange surface 20S is obtained, i.e. the surface that, in the operating condition, is to come in contact with the wash water to be heated in the pit 3.
  • an insulating element 21 is applied, which is made up of various layers of insulating or dielectric material printed or silk-screened on the same disk 20.
  • the electric resistances 22 are in turn silk-screened on said insulating element 21, according to a method known in the art, for generating heat by Joule effect.
  • said silk-screened resistances 22 have a circular ring shape and cover most of the outer surface of the first side 20A.
  • the ends of these rings making up the resistances 22 are connected to the respective ends of a pair of terminals 23, and therefore each terminal is in electric connection with one end of all the circular sectors making up the silk-screened resistances 22, thus ensuring a flow of electricity.
  • Said electric connection is provided through channels made of conductive material obtained inside or outside the layers making up the insulating element 21, always ensuring their electric insulation from the disk 20.
  • the above electrically conductive channels also conveniently manufactured through printing or silk-screening, are not shown in Fig. 3 for simplicity's sake.
  • the resistances 22 silk-screened on the outer side of the insulating element 21, and therefore on the side opposite to the second side 20B of the disk 20, there is no electric contact between them and the disk 20.
  • the silk-screened resistances 22 are then appropriately covered externally with another electrically and thermally insulating material, in order to avoid the dissipation of electricity and heat to the outside, thereby allowing the heat to be directed toward the second side 20B of the disk 20 and therefore to the wash water through the interface surface 20S.
  • said seat 3C is taken into account when co-molding the heating apparatus A in the pit 3.
  • the resistances 22 obtained by silk-screening are distributed on the first side 20A of the disk 20, so as to occupy substantially most of the available surface of the same face 20A, thereby maximizing the caloric power to be transmitted to the water.
  • the resistances 22 are positioned, as regards the part not touching the first side 20A of the disk 20, completely buried in the matrix being the material of the pit 3.
  • Said resistances 22 are completely insulated electrically beforehand, e.g. by applying a film of an electrically insulating material over them; any dispersion of electricity is thus avoided when an electric potential difference is applied to the terminals 23.
  • the disk 20 of the heating apparatus A has a protruding part 20L from the disk 20 itself, to facilitate its correct positioning during the co-molding operation within the pit 3.
  • the disk 20 is made of stainless steel; some variants employ quartz glass and/or ceramic materials. Such materials have better characteristics in terms of weight and electric insulation from the water in contact with the surface 20S of the second side 20B when the apparatus A is in the operating condition.
  • a logic control of a management and check system of the washing machine 1 in particular a dishwasher, is programmed to start a wash water heating phase
  • a potential difference suitable for causing the circulation of electric current within the silk-screened resistances 22 is applied to the terminals 23, through known connector means not represented here for simplicity's sake, thereby heating said resistances.
  • the resistances 22, as described are insulated only electrically, not thermally, from the disk 20 of the heating apparatus A through the insulating element 21, and therefore heat the entire disk 20.
  • the thermal flow is then transferred to the wash water in contact with the thermal exchange surface 20S. This process lasts the time necessary to implement the wash fluid heating phase, and takes place according to the instructions programmed in the control logic of the management and control system of the machine 1.
  • the heating apparatus A which is the object of the present invention, is designed and made in such a way as to be completely integrated, and so produced as one unit, with an element of the hydraulic circuit of the washing machine 1, in this specific case the pit 3 of a dishwasher.
  • An advantage is represented by an appreciable simplification of the supply and management activities related to the parts making up the washing machine, the latter being less complex than the known solutions, thereby improving the management of the industrial processes.
  • a further advantage is the reduction of the time needed to assembly the heating apparatus into the washing machine, said operation being simpler, with a consequent reduction of the risk of assembly errors by the operator.
  • a further advantage lies in the fact that the above improvements are implemented by obtaining an excellent ability of heating the mass of water circulating within the hydraulic circuit, as well as by using a known and reliable technology which however has found no applications so far in this field and for the purposes of the present invention.
  • the inventive idea of the present Patent substantially consists in applying the co-molding technique to working fluid heating apparatuses inserted within the plastic material of the pit of a dishwasher.
  • the heating devices substantially consist of resistive elements being electrically insulated in respect to a plane of a thermally conductive element suitable for transmitting heat to the working fluid being present in the pit.
  • the resistive elements may be silk-screened, after having been appropriately insulated electrically, onto a side of said thermally conductive and electrically insulated element, which side clearly must not be in contact with the working fluid.
  • the heating devices are co-molded with a pit of the dishwasher, where a big water mass is constantly present and in continuous contact with the heat transmitting surface, being said water mass preferably subjected to a slightly whirling motion.
  • the caloric power applied may be very high, thereby promoting a reduction of the water heating times.
  • the propagation of heat takes place not only by conduction among the layers of the working fluid, i.e. natural convection, but also by forced convection, thereby improving the transmission and distribution of caloric power within the working fluid. It follows that efficient washings can be performed in less time.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Washing And Drying Of Tableware (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)

Claims (21)

  1. Lave-vaisselle (1) en particulier pour une utilisation ménagère, comprenant un circuit hydraulique et un appareil (A) destiné à chauffer un fluide de travail circulant au sein du circuit hydraulique, ledit appareil (A) étant d'un type comprenant un premier élément (20) ayant une surface d'échange thermique (20S) opérationnellement en contact avec ledit fluide de travail pendant au moins une phase de chauffage dudit fluide de travail dudit lave-vaisselle (1),
    dans lequel
    ledit appareil (A) est comoulé avec un puits (3) du circuit hydraulique dudit lave-vaisselle (1), caractérisé en ce que ledit appareil (A) comprend une résistance (22) sérigraphiée sur ledit premier élément (20), destinée à chauffer le même élément (20), ladite résistance sérigraphiée (22) étant sensiblement noyée dans le matériau formant ledit puits (3) dudit lave-vaisselle (1) lorsque ledit appareil de chauffage (A) est comoulé avec ledit puits (3) dudit lave-vaisselle (1), ladite résistance sérigraphiée (22) étant sur un premier côté (20A) dudit premier élément (20) dudit appareil de chauffage (A), qui est différent d'un second côté (20B) logeant ladite surface d'échange thermique (20S) opérationnellement en contact avec ledit fluide de travail.
  2. Lave-vaisselle selon la revendication 1, caractérisé en ce que ladite surface d'échange thermique (20S) est laissée sensiblement exposée lorsque ledit appareil de chauffage (A) est comoulé avec ledit puits (3) dudit lave-vaisselle (1).
  3. Lave-vaisselle selon la revendication 1 ou 2, caractérisé en ce que ledit appareil de chauffage (A) comprend un élément isolant (21) sur lequel le matériau résistif formant ladite résistance sérigraphiée (22) est appliqué, ledit élément isolant (21) étant appliqué sur le premier élément (20) et étant électriquement mais non thermiquement isolé dudit premier élément (20).
  4. Lave-vaisselle selon la revendication précédente, caractérisé en ce que ledit élément isolant (21) est constitué d'un matériau électriquement isolant et est associé à un certain nombre de conduits électriquement conducteurs appropriés pour transmettre une différence de potentiel exclusivement aux extrémités de ladite résistance sérigraphiée (22) afin de la chauffer.
  5. Lave-vaisselle selon une ou plusieurs des revendications précédentes, caractérisé en ce que ledit appareil de chauffage (A) est logé dans une portion (31, 3S) dudit puits (3) dudit lave-vaisselle (1), avec ladite surface d'échange thermique (20S) en regard du puits (3).
  6. Lave-vaisselle selon la revendication précédente, caractérisé en ce que ladite portion dudit puits (3) dudit lave-vaisselle (1) comprend une portion inférieure (31) dudit puits (3).
  7. Lave-vaisselle selon la revendication précédente, caractérisé en ce que ledit premier élément (20) dudit appareil (A) a une forme telle à occuper sensiblement l'intégralité du fond dudit puits (3) dudit lave-vaisselle (1).
  8. Lave-vaisselle selon la revendication précédente, caractérisé en ce que ledit élément dudit appareil de chauffage (A) comprend un élément en forme de disque (20), qui est situé au fond de ladite portion inférieure (31) dudit puits (3).
  9. Lave-vaisselle selon la revendication 8, caractérisé en ce que ledit élément en forme de disque (20) est constitué d'un matériau de métal.
  10. Lave-vaisselle selon la revendication 8, caractérisé en ce que ledit élément en forme de disque (20) est constitué de verre de quartz et/ou de matériaux céramiques.
  11. Procédé de fabrication et d'assemblage d'un appareil (A) destiné à chauffer un fluide de travail circulant au sein d'un circuit hydraulique d'un lave-vaisselle (1), en particulier pour une utilisation ménagère, comprenant l'opération d'association dudit appareil de chauffage (A) avec un puits (3) dudit circuit hydraulique dudit lave-vaisselle (1), de sorte qu'au moins un premier élément (20) dudit appareil de chauffage (A) soit opérationnellement en contact avec ledit fluide de travail par le biais de sa surface d'échange thermique (20S) au moins pendant la mise en oeuvre d'une phase de chauffage dudit lave-vaisselle (1),
    dans lequel ledit procédé comprend un processus de comoulage dudit appareil de chauffage (A) dans le puits (3) dudit circuit hydraulique dudit lave-vaisselle (1), caractérisé en ce que ledit appareil (A) est fabriqué par l'utilisation d'un processus de sérigraphie destiné à appliquer un matériau résistif sur au moins une portion (21) dudit premier élément (20) dudit appareil de chauffage (A), en particulier ledit matériau résistif sérigraphié formant une résistance (22) appropriée pour générer de la chaleur à transmettre audit élément (20) qui est opérationnellement en contact avec ledit fluide de travail par le biais de l'une de ses surface (20S), ledit appareil de chauffage étant préassemblé avant d'être positionné dans les moules pour l'actionnement du processus de comoulage, ladite résistance sérigraphiée (22) étant sensiblement noyée dans le matériau formant ledit puits (3) dudit lave-vaisselle (1) lorsque ledit appareil de chauffage (A) est comoulé avec ledit puits (3) dudit lave-vaisselle (1) et ladite résistance sérigraphiée (22) étant sur un premier côté (20A) dudit premier élément (20) dudit appareil de chauffage (A), qui est différent d'un second côté (20B) logeant ladite surface d'échange thermique (20S) opérationnellement en contact avec ledit fluide de travail.
  12. Procédé selon la revendication précédente, caractérisé en ce que ledit processus de comoulage comprend l'étape consistant à laisser ladite surface d'échange thermique (20S) sensiblement exposée lorsque ledit appareil de chauffage (A) est comoulé avec ledit puits (3) dudit lave-vaisselle (1).
  13. Procédé selon la revendication précédente, caractérisé en ce que ledit processus de comoulage comprend l'insertion dudit appareil de chauffage (A) en association avec une matrice plastique caractérisant au moins une partie dudit puits (3).
  14. Procédé selon les revendications 11 à 13, caractérisé en ce que ledit processus de comoulage dudit appareil de chauffage (A) dans ledit composant (3) dudit lave-vaisselle (1) est réalisé de telle manière que ledit appareil de chauffage (A) forme une unité conjointement avec ledit puits (3), c'est-à-dire ledit appareil de chauffage (A) est incorporé dans ledit lave-vaisselle (1) simultanément avec ledit puits (3).
  15. Procédé selon la revendication 11, caractérisé en ce que ledit processus de sérigraphie comprend l'application du matériau résistif sur un élément isolant (21) qui est électriquement mais non thermiquement isolé par rapport audit premier élément (20) dudit appareil de chauffage (A).
  16. Procédé selon la revendication précédente, caractérisé en ce que ledit processus de sérigraphie comprend l'association dudit élément isolant (21) avec un premier côté (20A) dudit premier élément (20), différent d'un second côté (20B) où ladite surface d'échange thermique (20S) est obtenue.
  17. Procédé selon une ou plusieurs des revendications précédentes 11 à 16, caractérisé en ce que ledit processus de comoulage dudit appareil de chauffage (A) dans ledit lave-vaisselle (1) est mis en oeuvre lorsque ledit puits (3) qui constitue une partie du circuit hydraulique dudit lave-vaisselle (1) est fabriqué, en particulier de sorte que ledit puits (3) soit sensiblement prêt à être incorporé le long d'une ligne de production dudit lave-vaisselle (1).
  18. Procédé selon une ou plusieurs des revendications précédentes 11 à 17, caractérisé en ce que ledit processus de comoulage dudit appareil de chauffage (A) est effectué au sein dudit puits (3) du circuit hydraulique dudit lave-vaisselle (1), ledit puits (3) étant situé en un point dudit circuit hydraulique où ledit fluide de travail est opérationnellement présent en grande quantité et/ou soumis à un mouvement de tourbillonnement.
  19. Procédé selon la revendication 11, caractérisé en ce que pendant ledit processus de comoulage, ledit appareil de chauffage (A) est associé à une zone inférieure (31) dudit puits (3) dudit lave-vaisselle (1).
  20. Procédé selon la revendication précédente, caractérisé en ce que pendant ledit processus de comoulage, ledit appareil de chauffage (A) est associé au fond de ladite zone inférieure (3I) dudit puits (3).
  21. Procédé de fabrication et d'assemblage d'un lave-vaisselle (1) comprenant un procédé selon une ou plusieurs des revendications 11 à 20.
EP04105999.9A 2003-11-24 2004-11-23 Lave-vaiselle et procédé avec un appareil pour chauffer un liquide de travail Not-in-force EP1532919B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL04105999T PL1532919T3 (pl) 2003-11-24 2004-11-23 Zmywarka do naczyń i sposób z urządzeniem do podgrzewania płynu roboczego

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI20032282 2003-11-24
IT002282A ITMI20032282A1 (it) 2003-11-24 2003-11-24 Apparato e metodo per riscaldare un fluido di lavoro in macchine di lavaggio

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Publication Number Publication Date
EP1532919A1 EP1532919A1 (fr) 2005-05-25
EP1532919B1 true EP1532919B1 (fr) 2017-01-11

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EP (1) EP1532919B1 (fr)
IT (1) ITMI20032282A1 (fr)
PL (1) PL1532919T3 (fr)

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DE10356790A1 (de) * 2003-12-04 2005-07-07 BSH Bosch und Siemens Hausgeräte GmbH Heizvorrichtung für Fluide, Durchlauferhitzer und Verfahren zu deren Herstellung
DE102005043030A1 (de) 2005-09-09 2007-03-15 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspülmaschine

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PL1532919T3 (pl) 2017-07-31
ITMI20032282A1 (it) 2005-05-25

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