EP0191729B1 - Machine à laver - Google Patents

Machine à laver Download PDF

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Publication number
EP0191729B1
EP0191729B1 EP86810049A EP86810049A EP0191729B1 EP 0191729 B1 EP0191729 B1 EP 0191729B1 EP 86810049 A EP86810049 A EP 86810049A EP 86810049 A EP86810049 A EP 86810049A EP 0191729 B1 EP0191729 B1 EP 0191729B1
Authority
EP
European Patent Office
Prior art keywords
providing
drum
washing machine
wash
machine according
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
Application number
EP86810049A
Other languages
German (de)
English (en)
Other versions
EP0191729A2 (fr
EP0191729A3 (en
Inventor
Jakob Huber
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT86810049T priority Critical patent/ATE46928T1/de
Publication of EP0191729A2 publication Critical patent/EP0191729A2/fr
Publication of EP0191729A3 publication Critical patent/EP0191729A3/de
Application granted granted Critical
Publication of EP0191729B1 publication Critical patent/EP0191729B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • D06F17/00—Washing machines having receptacles, stationary for washing purposes, wherein the washing action is effected solely by circulation or agitation of the washing liquid

Definitions

  • the invention relates to an automatic washing machine, in particular for washable textiles, which is set up for carrying out at least one cleaning and one rinsing process and, if appropriate, one spinner and one drying process, with a drum rotatably arranged in a housing for receiving the laundry, which is also used for washing Circumferentially distributed openings are provided for the inlet and outlet of the washing water, which is mixed with a detergent during the cleaning process.
  • the washing machines currently customary mostly have a lying washing drum which rotates periodically first in one direction and then in the other, the laundry being drawn through the water in the drum. As a result, it is heavily tumbled and even rolled up into lumps. It rubs off the holes in the washing drum, especially if it is embroidered, and if these are also sharp-edged, cracks or even holes in the laundry can easily occur. So-called gentle gears with slower rotary movements were therefore introduced, but the risk of clumping and chafing remains. Occasionally, in order to compensate for the slower movement, the detergents are added in larger quantities or those with a higher concentration, but the laundry is thereby attacked to an increased extent and the environment is polluted even more with the waste water.
  • the invention has for its object to provide an automatic washing machine in which the laundry is no longer damaged on the drum wall and which is also suitable for other laundry.
  • the automatic washing machine allows a new, improved washing process to be carried out by holding the laundry in the drum during the entire cleaning and rinsing process, which washing water flows through continuously during the cleaning and rinsing process.
  • a clumping of the laundry is prevented, which is now cleaned more uniformly and therefore more quickly, as a result of which less detergent is required and the time for the entire washing process and the energy requirement or expenditure are reduced.
  • abrasion of the laundry is avoided, which enables cleaning delicate and even fragile laundry.
  • the washing water hits the items to be washed once from one side and the next, which also improves the cleaning or rinsing process and abbreviates.
  • a spinning and / or drying process can end the washing process, for which all switching and dosing processes can be controlled electronically and set using a selectable time program.
  • the grid basket 2 is inserted and conveniently fastened therein.
  • the lattice basket is divided by lattice walls 3 in such a way that layers 4, which are filled with laundry in the drawing and parallel to the (not shown) axis of rotation of the drum, between which a laundry-free space 5 is left out, as can be seen more clearly from FIG. 2.
  • the axis of rotation can be arranged horizontally or vertically and thus the drum with the mesh basket lying or standing.
  • the drum 1 with the mesh basket 2 is surrounded by the water and airtight housing 6, which has the inlet 7 and the outlet 8.
  • the space 9 between the drum 1 and the housing 6 is divided by the walls 10.
  • the entire washing machine is covered with the jacket 11.
  • the recirculation line 12 extends into which the pump 13 and the additional heating device 14, for. B. an electrically or gas-heated heat exchanger are turned on.
  • the heating device 15 is built into the housing of the pump 13, preferably around its flow channel, in the form of a heating coil or heating elements, which can likewise be heated with gas or electrically.
  • the outlet line 16 branches off from the recirculation line 12 and is equipped with the outlet valve 17 and a coarse filter 18 connected upstream of this valve.
  • the heat exchanger 19 which also has the function of a boiler and is therefore additionally electrically or gas-heated, is flowed through on the one hand by waste water which flows out of the housing 6 through the line 20, and on the other hand by Fri water that flows through line 21.
  • a container 26 for liquid detergent can optionally or additionally be provided.
  • the heat exchanger 27 is flowed through on the one hand by the exhaust air, which emerges from the housing 6 as a partial flow or as a whole air flow into the surrounding atmosphere, as arrows 28 illustrate, on the other hand by fresh air as a replacement for the exhaust air, which flows in through line 29 and via the Line 30 opens into the recirculation line 12.
  • the lattice basket 2 shows the empty lattice basket 2.
  • the mutually parallel layers 4 formed by the grid walls 3 for the items to be washed with the spaces 5 free of items to be washed in between are clearly visible.
  • the wire mesh baskets have more or fewer wire mesh walls and, optionally, no items free of laundry items.
  • the laundry is filled (in the drawing) from above, which can take place both in the assembled state inside the drum 1 and outside the washing machine.
  • Fig. 3 shows the drum 1, which is provided with openings 31 distributed over the circumference for the inlet and outlet of the washing water.
  • the mesh basket 2 can be inserted into the drum and fastened in it in rotation.
  • the cantilevered shaft stub 32, on which the paddle wheel 33 is seated, is connected to the drum 1.
  • deflection blades attached directly to the drum can also be provided. The initiation of the rotary motion is explained below.
  • the drum 1 can be supported on both sides.
  • fresh water is filled into the housing 6 through the line 21 via the heat exchanger 19 until the intended level is reached and a level controller (not shown) stops the supply of fresh water.
  • the heat exchanger remains filled with water, which is achieved either by a shut-off valve or by an overflow arranged at the top.
  • powdered detergent is flushed out of the container 23 or, when the washing machine is set up for such a supply, liquid detergent is injected from the container 26, which can be done by electrical, mechanical or hydraulic means.
  • the pump 13 is started, which conveys the washing water from the housing outlet 8 through the recirculation line 12 to the housing inlet 7.
  • the washing water would be easily heated, but is not common and is usually not necessary.
  • the returned wash water entering at 7 is distributed in the space 9 between the drum 1 and the housing 6 and flows through the laundry to the outlet 8. So that it does not flow through the space 9 to the outlet 8 bypassing the laundry, these are Walls 10 provided. So already during prewashing, as in all subsequent processes, the items to be washed stand still relative to the drum and only the wash water is passed through.
  • the rotating mechanism for the drum 1 is also switched on.
  • the rotary movement can take place continuously, preferably slowly, in order to protect the laundry, save energy and give the washing water time to flow reliably through the laundry.
  • Another advantageous possibility is to rotate the drum only intermittently, with longer breaks in between.
  • the drum is first placed in such a way that the laundry layers are perpendicular to the general direction of flow of the washing water through the drum. After a pre-programmable period of time, the drum is rotated by 180 ° so that the wash water hits the laundry from the opposite side. This process can be repeated any number of times. This results in an excellent cleaning effect even when prewashing.
  • the dirty water is drained off via the recirculation line 12 into the drain line 16 when the pump is at a standstill.
  • the coarse filter 18 is provided in order to catch larger pieces which may be carried along and which could block or even damage the valve.
  • the prewashed goods in particular laundry, can then be spun out in order to remove as much of the dirty water as possible.
  • the drum must run at a much higher speed than during prewashing.
  • the drive could of course be carried out with its own small motor, but there are other options, namely the existing hydraulic means, which makes a motor unnecessary.
  • the paddle wheel 33 connected to the drum 1 is provided, which, for. B. is pressurized with pressurized water. All that is required is a residual amount of dirty water left in the housing, which is sucked in by the pump 13 and sprayed onto the paddle wheel. Full pressure is used for the fast rotary movement, while the supply line to the paddle wheel is throttled for the slow rotary movement. Extraneous water can also be used for this if it is in sufficient Amount and under sufficiently high pressure is available.
  • the fresh water in the heat exchanger 19, which serves as a boiler, is heated by external heating.
  • hot water is now let in from the heat exchanger 19 into the housing 6 until the level controller switches off the supply.
  • powder detergent is flushed out of the container 24 or liquid detergent is injected from the container 26.
  • the pump 13 and the mechanism for the rotary movement of the drum 1 are switched on, which is rotated continuously or at intervals of 180 ° in a manner similar to that for prewashing.
  • the pump 13 sucks the washing water out of the housing 6 and conveys it back into the housing via the recirculation line 12, where it flows through the laundry and is sucked out again at the outlet 8. On the way through the recirculation line, it is heated to the desired temperature in the additional heating device 14 or — depending on which heating is provided — in the heating device 15 at the pump and is also kept at this temperature during the cleaning process.
  • setpoint curves can be set for different types of laundry or laundry and different degrees of soiling the necessary concentration of the detergent is set up and entered into the washing machine. These curves, plotted over time, show a decreasing, towards zero course.
  • the actual value of the concentration of the detergent in the washing water is measured, which in a known manner, for. B. with two electrodes acting as sensors, can be compared with the predetermined setpoint at this time and by adding fresh detergent, for which the liquid is particularly suitable, adjusted to the setpoint. Due to the course of the curve towards zero, practically all of the detergent entered is used up in the process described.
  • the cleaning process is ended when the specified time of the selected curve has expired or after a specified minimum duration of the cleaning process the measured actual value exceeds the specified target value.
  • the detergent addition can also be controlled in other ways.
  • the actual concentration value is measured from time to time and brought to a constant setpoint by adding detergent. As soon as the difference between the setpoint and actual value falls below a specified minimum, the cleaning process is ended.
  • the detergent consumption in the second-mentioned dimensioning method is greater than in the previous case, but is still much smaller than usual when working with a constant amount, which was often overdosed, in order to obtain reliably clean laundry. Now the laundry is protected more and the environment is less polluted. A combination of the two types of tax described is also conceivable.
  • Excessive contamination of the washing water during the cleaning process can be countered by temporarily or continuously draining a limited amount of the washing water and replacing it with fresh water from the heat exchanger 19.
  • This wastewater can be discharged through the drain line 16, but it is more economical to pass it through the heat exchanger 19, where it gives off its heat to the fresh water, and then to discharge it through the line 20.
  • all of the dirty water is drained off, which is preferably carried out through the heat exchanger 19 in order to at least partially utilize its heat in this way.
  • the used warm water is advantageously drained slowly, which can be done with additional valves or with a small centrifugal pump.
  • the laundry can also be spun before the washing process starts.
  • Fresh water is let into the housing 6 from the heat exchanger 19, which was heated by the previously drained wastewater, possibly by additional external heating.
  • the level controller controls the amount of fresh water that has run in, then shuts off the supply and gives the impulse for starting the pump 13, which presses the rinsing water through the laundry, sucks it off at the housing outlet 8 and conveys it back to the housing inlet 7 via the recirculation line 12. In this way it can be heated further by the heating devices 14 or 15, but depending on the items to be washed, little heated or even cold rinse water can suffice.
  • the drum 13 is placed in such a way that the laundry layers are positioned perpendicular to the general direction of flow through the drum. From time to time the drum is rotated by 180 ° so that the rinsing water hits the layers of laundry from the opposite side. An occasional rotation of the drum only by 90 ° with a direct possibility for the rinsing water to flow through the wash-free spaces 5 can sometimes be expedient. An additional supply of wash water through a supply line opening into the housing 6 near the highest point can further increase the flushing effect.
  • the rinsing process is ended after a pre-programmed period of time.
  • the remaining concentration of detergent can also be measured if the wash water is drained and a further rinsing process is initiated.
  • Intermediate spinning is also possible and increases the washing effect. In this way, a really clean and chemical-free laundry is achieved, which is particularly desirable and valued for laundry.
  • the cleaning and rinsing process can alternately be repeated two or even several times.
  • the water is drained and the laundry may also be spun.
  • a drying process can be connected, which is preferably done with heated air. This is pressed through the laundry, a partial flow can also - e.g. B. for loosening laundry - are fed from below, absorbing moisture, which is of course only possible to a certain degree of saturation. It must therefore be renewed from time to time or continuously.
  • the pump can be constructed in such a way that it can also be operated at a much higher speed than when pumping water. It therefore acts like a fan and is suitable for conveying air.
  • Another way to achieve dry air is to guide the humid air - similar to an air conditioning system - along its circuit via the artificially supercooled surfaces of another (not shown) heat exchanger, where the water vapor present in the air is partly condensed out.
  • the condensate is drained and there is no need to renew the air.
  • an advantageous process is generated in part as heat, which can be used to subsequently heat the air.
  • the drum is rotated continuously or intermittently even during the drying process. Since there is no longer any water in the machine, and the pump may also be required for air delivery, there is a way out that the paddle wheel 33 is subjected to a sharp jet of air, which is taken from the air flow. Such a jet is sufficient to slowly rotate the drum and the laundry, which is sufficient anyway. A single motor is therefore sufficient to operate the washing machine.
  • the washing process described can be varied and combined practically as desired in its individual phases.
  • an electronic time program can be selected to adapt the washing process to the type and sensitivity, the degree of soiling of the items to be washed, which detects the rotary movements of the drum, the change or repetition of the individual processes, the renewal of the wash water or the Air, the dosage of detergents, the switching on and dimensioning of the heaters and the like, together controls.
  • the construction of the washing machine according to the invention allows the grid basket to be filled outside the machine and placed in a separate kettle filled with water for soaking. Of course, this can also be done in the washing machine itself by filling the housing 6 with water according to the first step of the prewash program. Soaking shortens the washing time in the machine, in particular prewashing, which can even be omitted entirely, which protects the laundry even more. It is advantageous to do the soaking during the day and the actual washing process with the cheap night electricity.
  • the washing machine is used a lot, as is the case, for example, in laundries, then it is advisable to use two wire baskets turn. While the laundry in one basket is being washed, the laundry in the second basket is soaked, and so on. The wash cycles can then follow one another much more quickly, and there is then often hardly enough time available for heating the fresh water in the heat exchanger 19. Especially for this case, but also in general, it is advantageous to use the full electrical connected load when there is a small need for electrical energy during the washing process and to store it as available heat in the heat exchanger 19 serving as the boiler.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Centrifugal Separators (AREA)

Claims (18)

1. La machine à laver, en particulier pour des textiles lavables, qui est conçue pour la réalisation d'au moins un processus de lavage et un processus de rinçage et, le cas échéant, un processus d'essorage et de séchage, équipée d'un tambour rotatif contenu dans un boîtier, tambour recevant la lessive et qui est muni d'ouvertures réparties sur son pourtour pour l'arrivée et l'écoulement de l'eau, à laquelle, pendant le processus de lavage est mélangé un détergent, est caractérisé par le fait que
- la lessive, pendant l'ensemble de son séjour dans le tambour (1), reste relativement immobile, alors que le tambour tourne continuellement ou par intermittence de 180° au maximum;
- pendant le processus de lavage et de rinçage, l'eau de lavage irrigue le tambour (1), continuellement et au moins approximativement de façon verticale à son axe de rotation;
- une conduite de recirculation (12), munie d'une pompe (13) sur le parcours du courant, est prévue à la sortie (8) et à l'entrée (7) du boîtier (6) et en particulier pour le refoulement de l'eau de lavage pendant le processus de lavage et de rinçage.
2. La machine à laver, selon la revendication 1, est caractérisée par le fait qu'entre chaque deux couches (4) de lessive voisines, est aménagé un espace libre (5) de lavage.
3. La machine à laver, selon la revendication 1, est caractérisée par une conduite d'écoulement (16) se séparant de la conduite de recirculation (12), qui est équipée d'une vanne d'écoulement (17) précédée d'un filtre grossier (18).
4. La machine à laver, selon la revendication 1, caratérisée par un échangeur de chaleur (19) pour le chauffage au moins partiel de l'eau propre, lequel échangeur de chaleur est irri- guable par l'eau d'écoulement du processus de lavage et de rinçage.
5. La machine à laver, selon la revendication 4, caractérisée par le fait que l'échangeur de chaleur est chauffable complémentairement à l'électricité.
6. La machine à laver, selon la revendication 1, caractérisée par un certain nombre de moyens (13, 14, 27) capables de produire de l'air chaud pour le processus de séchage.
7. La machine à laver, selon la revendication 6, caractérisée par le fait que l'air chaud humide du processus de séchage, circule par l'échangeur de chaleur (27), lequel air chaud sert à chauffer au moins en partie l'air frais.
8. La machine à laver, selon la revendication 6, caractérisée par le fait que l'air circulant en circuit fermé par le tambour (1) et par la conduite de recirculation (12), irrigue un échangeur de chaleur disposant de surfaces surrefroidies après avoir irrigué le tambour. La vapeur d'eau contenue dans l'air se condense au - contact des surfaces surrefroidies de l'échangeur de chaleur et cet air subi par la suite un réchauffement avant d'irriguer à nouveau le tambour.
9. La machine à laver, selon la revendication 6, caractérisée par le fait que la pompe (13), dans la conduite de recirculation (12), est également exploitable avec un nombre de tours très supérieurs à ceux nécessaires à la circulation de l'eau, afin d'être utilisé de ventilateur pour la circulation de l'air.
10. La machine à laver, selon la revendication 1, caractérisée par le fait que dans le boîtier de la pompe (13), un dispositif de chauffage (15) est installé, de préférence autour du canal de circulation.
11. La machine à laver, selon la revendication 1, caractérisée par le fait qu'à l'axe du tambour (1) est fixée une roue à aubes (33), roue qui est ainsi liée au tambour, sur laquelle est injecté un jet d'eau ou d'air.
12. La machine à laver, selon la revendication 1, caractérisée par le fait qu'à l'endroit le plus élevé dans le boîtier (6) débouche une conduite, afin de diriger par le haut une eau de lavage supplémentaire pendant le processus de rinçage.
13. La machine à laver, selon les revendications 1 et caractérisée par le fait que les mouvements de rotation du tambour (1), le changement du processus de lavage au processus de rinçage, le cas échéant également du processus d'essorage à celui du séchage, ainsi que le dosage du détergent, sont simultanément commandables par un programme électronique déterminable au préalable.
14. Procédure de mise en service de la machine à laver selon la spécification 1, caractérisée par le fait que pendant le processus de nettoyage, la valeur effective de la concentration du détergent, dans l'eau de lavage, est mesurée à intervalles déterminés, comparée avec une valeur prescrite au préalable et selon les besoins, adaptée à cette valeur prescrite par adjonction de détergent.
15. Procédure selon revendication 14, caractérisée par le fait que la valeur prescrite de la concentration est établie sous la forme d'une courbe en fonction du temps de fonctionnement.
16. Procédure selon revendication 14, caractérisée par le fait que le processus de lavage s'achève et que celui du rinçage est enclenché, dès que la valeur effective de la concentration dépasse la valeur prescrite et ceci après une durée minimale du processus de lavage qui peut être fixée.
17. Procédure de mise en service de la machine à laver selon spécification 1, caractérisée par le fait que pendant le déroulement du lavage, au moins deux processus de lavage et de rinçage s'alternent mutuellement après un laps de temps programmé à l'avance.
18. Procédure de mise en service de la machine à laver selon revendication 1, caractérisée par le fait que l'eau de lavage est dirigée, pendant le processus de lavage en raison de la position correspondante du tambour (1), position approchant au moins la verticale, dans la lessive rangée en couches (4), et après l'écoulement d'un laps de temps programmé au préalable, le tambour tourne de 180°, de façon telle que l'eau de lavage touche la lessive par le côté apposé.
EP86810049A 1985-02-12 1986-01-27 Machine à laver Expired EP0191729B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86810049T ATE46928T1 (de) 1985-02-12 1986-01-27 Waschmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH615/85A CH667298A5 (de) 1985-02-12 1985-02-12 Waschautomat.
CH615/85 1985-02-12

Publications (3)

Publication Number Publication Date
EP0191729A2 EP0191729A2 (fr) 1986-08-20
EP0191729A3 EP0191729A3 (en) 1987-08-26
EP0191729B1 true EP0191729B1 (fr) 1989-10-04

Family

ID=4191120

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86810049A Expired EP0191729B1 (fr) 1985-02-12 1986-01-27 Machine à laver

Country Status (6)

Country Link
US (1) US4727733A (fr)
EP (1) EP0191729B1 (fr)
AT (1) ATE46928T1 (fr)
CA (1) CA1258381A (fr)
CH (1) CH667298A5 (fr)
DE (1) DE3666055D1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2632329B1 (fr) * 1988-06-07 1991-09-06 Ciapem Procede de lavage du linge de laine, et machine a laver le linge mettant en oeuvre ce procede
CH688556A5 (it) * 1993-12-09 1997-11-14 Franco Carloni Apparecchio elettrodomestico per lavare e/o asciugare utilizzante l'acqua calda dell'impianto centralizzato circolante in serpentine.
US6826933B2 (en) * 2002-02-06 2004-12-07 Maytag Corporation Dual use detergent dispenser
WO2007013327A1 (fr) * 2005-07-28 2007-02-01 Sharp Kabushiki Kaisha Machine a laver / seche-linge a tambour
JP4022239B1 (ja) * 2006-08-10 2007-12-12 シャープ株式会社 洗濯乾燥機およびこの制御方法
DE102007011118A1 (de) 2007-03-07 2008-09-11 BSH Bosch und Siemens Hausgeräte GmbH Gerät zum Waschen und Trocknen
US8490439B2 (en) * 2011-09-30 2013-07-23 Electrolux Home Products, Inc. Water recirculation and drum rotation control in a laundry washer
AT520264B1 (de) * 2017-06-29 2019-05-15 Helena Flavia Khevenhueller Metsch Frontlader-Waschmaschine

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1460400A (en) * 1923-07-03 Dijjhwashihg apparatus
DE254791C (fr) *
US322710A (en) * 1885-07-21 Washing-machine
US1869510A (en) * 1929-06-18 1932-08-02 Vernon Ltd R Washing machine
GB355079A (en) * 1930-09-25 1931-08-20 Simon Henri Stoffel Improvements in and relating to washing machines
DE621197C (de) * 1933-03-01 1935-11-02 Alphonse Persoons Waschmaschine mit durch einen Deckel abdeckbarem Waeschebehaelter und mittlerem Siebrohr
US2076011A (en) * 1934-09-17 1937-04-06 Harry E Surface Washing machine
GB616160A (en) * 1944-09-14 1949-01-18 Marcel Beucler Improvements relating to laundry machines
US2498734A (en) * 1948-08-06 1950-02-28 Louie P Bozanich Washing and drying machine with fluid impeller
FR63408E (fr) * 1952-10-17 1955-09-13 Machine à laver
US2689413A (en) * 1953-01-05 1954-09-21 Kachuck Mike Dry cleaning apparatus
FR1102267A (fr) * 1954-06-10 1955-10-18 Machine à laver le linge
FR1364698A (fr) * 1963-05-13 1964-06-26 Procédé et appareil pour le traitement de tissus, notamment pour le lavage du linge
US3410117A (en) * 1967-04-07 1968-11-12 Harry N. Elam Cap-cleaning apparatus
US3401834A (en) * 1967-04-17 1968-09-17 Gen Motors Corp Laundry conditioner dispenser system
US3645669A (en) * 1969-02-28 1972-02-29 Gerhard Rausch Method and arrangement for testing the liquid in washing machines
DK144769C (da) * 1979-12-06 1982-12-13 Voelund Vaskerimaskiner Tromlevaskemaskine med varmeveksler

Also Published As

Publication number Publication date
EP0191729A2 (fr) 1986-08-20
US4727733A (en) 1988-03-01
EP0191729A3 (en) 1987-08-26
CH667298A5 (de) 1988-09-30
DE3666055D1 (en) 1989-11-09
ATE46928T1 (de) 1989-10-15
CA1258381A (fr) 1989-08-15

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