ES2338475T3 - WASHING MACHINE FOR DRY CLEANING WITH INFRARED GAS DETECTOR. - Google Patents

WASHING MACHINE FOR DRY CLEANING WITH INFRARED GAS DETECTOR. Download PDF

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Publication number
ES2338475T3
ES2338475T3 ES07102542T ES07102542T ES2338475T3 ES 2338475 T3 ES2338475 T3 ES 2338475T3 ES 07102542 T ES07102542 T ES 07102542T ES 07102542 T ES07102542 T ES 07102542T ES 2338475 T3 ES2338475 T3 ES 2338475T3
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Prior art keywords
washing machine
dry cleaning
gas
circuit
solvent
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ES07102542T
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Spanish (es)
Inventor
Fabio Spizzo
Giorgia Possamai
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Electrolux Home Products Corp NV
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Electrolux Home Products Corp NV
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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
    • D06F43/00—Dry-cleaning apparatus or methods using volatile solvents
    • 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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/28—Air properties
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/58—Indications or alarms to the control system or to the user
    • 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
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/42—Safety arrangements, e.g. for stopping rotation of the receptacle upon opening of the casing door
    • 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
    • D06F58/00—Domestic laundry dryers
    • D06F58/32—Control of operations performed in domestic laundry dryers 
    • D06F58/34—Control of operations performed in domestic laundry dryers  characterised by the purpose or target of the control
    • D06F58/50—Responding to irregular working conditions, e.g. malfunctioning of blowers

Abstract

Household dry-cleaning washing machine comprising a tub (10) wherein a perforated drum (12) to store clothes is rotating and a closed circuit (14) to let a solvent like decamethylcyclopentasiloxane (D5) circulating in an air stream across the drum. The circuit comprises a condenser (16), a heater (18) and a fan (20). At least a gas sensor (22) is provided to detect the solvent concentration in air, as well as to deliver a relevant data to an electronic device (38) to control the machine. The gas sensor (22) is an infrared device (IR) which is positioned outside the closed air circuit (14) and is connected therewith, in such a way that the gas solvent may be made to circulate along an optical path (28) wherein the solvent flows by absorbing IR energy.

Description

Máquina lavadora para limpieza en seco con detector de gases por infrarrojos.Washing machine for dry cleaning with infrared gas detector.

El presente invento se refiere a una máquina lavadora para limpieza en seco, es decir, una máquina lavadora en la que se utiliza como disolvente o solución de limpieza un fluido lipofílico, no acuoso.The present invention relates to a machine washing machine for dry cleaning, that is, a washing machine in which is used as a solvent or cleaning solution a fluid lipophilic, non-aqueous.

El decametilciclopentasiloxano (D5) es un fluido de lavado ya utilizado en el campo de la lavandería industrial y comercial, donde el control de seguridad se lleva a cabo normalmente, y de forma más fácil, mediante personal experto. Su introducción en las máquinas domésticas está, justamente ahora, a punto de iniciarse, ya que el uso de dicho fluido es más peligroso en un entorno doméstico.Decamethylcyclopentasiloxane (D5) is a fluid washing already used in the field of industrial laundry and commercial, where security control is carried out normally, and more easily, by expert personnel. its introduction in domestic machines is, right now, to starting point, since the use of said fluid is more dangerous In a domestic environment.

El D5 es un líquido lipofílico que tiene una presión de vapor no despreciable. El conocimiento de la concentración de D5 en el aire es esencial por muchas razones. En primer lugar, para diseñar apropiadamente el circuito de lavado/secado y para adoptar programas para sucesos imprevisibles. Además, para garantizar que no se alcanzan los límites de inflamación/explosión y que no se superan los límites de exposición. Pueden preverse muchos sistemas diferentes para medir el D5 en el aire; en principio, para tal fin puede utilizarse cualquiera que proporcione un cambio físico/químico y mensurable.D5 is a lipophilic liquid that has a vapor pressure not negligible. The knowledge of the D5 concentration in the air is essential for many reasons. In first, to properly design the circuit washing / drying and to adopt programs for unpredictable events. In addition, to ensure that the limits of inflammation / explosion and exposure limits are not exceeded. Many different systems can be provided to measure D5 in the air; in principle, for that purpose, anyone who provide a physical / chemical and measurable change.

Desafortunadamente, el D5 no es bien conocido y solamente se han investigado parcialmente unas pocas soluciones.Unfortunately, D5 is not well known and Only a few solutions have been partially investigated.

El documento WO 01/94686 describe un sistema para controlar un ciclo de lavado en un aparato de secado utilizando un perceptor de gas capaz de percibir la concentración de vapor de fluido lipofílico en el tambor del aparato de secado. Se ha informado de diversas categorías de perceptores como ejemplos no limitativos, como los perceptores reactivos, los perceptores de propiedades físicas, los perceptores por absorción, así como una combinación de perceptores. Sin embargo, no se ofrecen enseñanzas acerca de una aplicación práctica, definida, del perceptor en una máquina lavadora, particularmente una máquina lavadora doméstica. Es más, la aplicación de dichos perceptores conlleva problemas de ensuciamiento, en particular debido a los siloxanos, que tienen una tendencia particular a dejar residuos pegajosos o grasientos en las superficies.WO 01/94686 describes a system to control a wash cycle in a drying apparatus using  a gas sensor capable of perceiving the vapor concentration of lipophilic fluid in the drum of the drying apparatus. It has been informed of various categories of recipients as examples not limiting, such as reactive perceivers, recipients of physical properties, absorption perceivers, as well as a combination of perceivers. However, no teachings are offered. about a practical, defined application of the perceiver in a washing machine, particularly a domestic washing machine. Is moreover, the application of said recipients involves problems of fouling, in particular due to siloxanes, which have a particular tendency to leave sticky or greasy residues in surfaces.

El documento US-A-2005/0183208 describe un aparato de lavado en modo doble, capaz de realizar operaciones de lavado y de secado en las que se utiliza un fluido lipofílico. Se proporciona un perceptor de gas para vigilar la concentración de vapor en la corriente de aire que sale de la cuba. Sin embargo, no se ofrecen enseñanzas acerca de la aplicación práctica del perceptor en la máquina, en particular con referencia a los problemas de ensuciamiento del perceptor.The document US-A-2005/0183208 describes a washing machine in double mode, capable of performing washing and drying in which a lipophilic fluid is used. Be provides a gas sensor to monitor the concentration of steam in the air stream that comes out of the tank. Not however lessons are offered about the practical application of perceptor in the machine, in particular with reference to fouling problems of the perceiver.

El documento JP 5277287 describe una secadora que utiliza un disolvente de hidrocarburo. El disolvente fluye en un circuito cerrado que, esencialmente, comprende el tambor que contiene las prendas, un condensador, un calentador y un ventilador. Un detector de la concentración de gas está posicionado en la entrada del condensador y controla una válvula de admisión y una válvula de escape del circuito con el fin de eliminar el peligro que supone una explosión por ignición del disolvente evaporado. Dicha solución adolece de los mismos problemas de ensuciamiento ya mencionados, dado que el detector está posicionado directamente dentro del circuito del disolvente.JP 5277287 describes a dryer which uses a hydrocarbon solvent. The solvent flows in a closed circuit that essentially comprises the drum that It contains the garments, a condenser, a heater and a fan. A gas concentration detector is positioned at the condenser inlet and controls an intake valve and an exhaust valve of the circuit in order to eliminate the danger  which involves an explosion by ignition of the evaporated solvent. This solution suffers from the same fouling problems as mentioned, since the detector is positioned directly within the solvent circuit.

El objeto del presente invento no sólo es poner en práctica un sistema de seguridad para una máquina lavadora doméstica de limpieza en seco, basado en el control de la concentración del disolvente gaseoso sino, también, mantener al usuario informado puntualmente acerca del desarrollo del programa.The object of the present invention is not only to put in practice a safety system for a washing machine Domestic dry cleaning, based on the control of the concentration of the gaseous solvent but also keep the user promptly informed about the development of the Program.

Otro objeto del invento es proponer una realización mejorada de una máquina lavadora doméstica de limpieza en seco en la que se ha resuelto sustancialmente el problema del ensuciamiento del perceptor de la concentración del gas.Another object of the invention is to propose a Improved realization of a domestic cleaning washing machine dry in which the problem of the fouling of the gas concentration sensor.

Estos y otros objetos del invento se materializan en una máquina lavadora doméstica de limpieza en seco de acuerdo con las reivindicaciones de esta patente.These and other objects of the invention are they materialize in a dry cleaning domestic washing machine according to the claims of this patent.

Las características y ventajas del invento se comprenderán mejor a partir de la siguiente descripción, dada como ejemplo no limitativo, con referencia a los dibujos adjuntos, en los que:The features and advantages of the invention are will understand better from the following description, given as non-limiting example, with reference to the attached drawings, in the that:

- la figura 1 muestra esquemáticamente una máquina lavadora de limpieza en seco de acuerdo con el presente invento;- Figure 1 schematically shows a dry cleaning washing machine according to this invention;

- la figura 2 muestra esquemáticamente un dispositivo perceptor para ser aplicado a una máquina lavadora de limpieza en seco como la de la figura 1;- Figure 2 schematically shows a sensing device to be applied to a washing machine dry cleaning as in figure 1;

- la figura 3 muestra una solución alternativa con respecto a la representada en la figura 1.- Figure 3 shows an alternative solution with respect to that represented in figure 1. 

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Una máquina lavadora de limpieza en seco está provista sustancialmente de una cuba 10 en la que está montado un tambor perforado 12 para girar y contener las prendas de ropa y de un circuito cerrado 14, en el que está incluida la cuba 10, y por el que se hace circular un disolvente como decametilciclopentasiloxano (D5) en una corriente de aire. Véase la figura 1.A dry cleaning washing machine is substantially provided with a tank 10 in which a perforated drum 12 to rotate and contain clothes and clothing a closed circuit 14, in which the tank 10 is included, and by which circulates a solvent like Decamethylcyclopentasiloxane (D5) in an air stream. See the Figure 1.

El circuito 14 comprende un condensador 16, un calentador 18 y un ventilador 20. Al menos un perceptor 22 de gas está asociado, también, con el circuito 14 con el fin de detectar la concentración de gas en él, y para permitir el control del grado de secado así como de las condiciones de seguridad en funcionamiento.The circuit 14 comprises a capacitor 16, a heater 18 and a fan 20. At least one gas sensor 22 is also associated with circuit 14 in order to detect the gas concentration in it, and to allow control of the degree of drying as well as the safety conditions in functioning.

De acuerdo con el presente invento, dicho perceptor 22 de gas es un detector de gas por IR, posicionado fuera del circuito 14 para evitar problemas de ensuciamiento. Para la luz en la región del infrarrojo (IR) se sabe que el D5 tiene un espectro de absorción simple e intenso, en el que la altura de los picos está directamente relacionada con la concentración de D5. Como consecuencia, una vez conocida una curva de calibración estándar, puede calcularse fácilmente la concentración real.In accordance with the present invention, said Gas Perceptor 22 is an IR gas detector, positioned outside of circuit 14 to avoid fouling problems. For the light in the region of infrared (IR) it is known that D5 has a simple and intense absorption spectrum, in which the height of the peaks is directly related to the concentration of D5. As a consequence, once a calibration curve is known standard, the actual concentration can be easily calculated.

El perceptor 22 de gas está conectado con el circuito 14 a través de una entrada 24 y una salida 26, de tal manera que el disolvente gaseoso pueda extraerse del circuito y hacerse circular a lo largo de un trayecto óptico 28, después del cual el disolvente gaseoso es introducido de nuevo en el circuito 14. Una fuente de IR 30 y un detector de IR 32 están situados en extremos opuestos del trayecto óptico 28. La fuente de IR emite energía en el intervalo de las bandas de absorción de D5 y esta energía es absorbida por el D5 a lo largo del trayecto óptico y revelada por el detector de IR. Véase la figura 2.The gas sensor 22 is connected to the circuit 14 through an input 24 and an output 26, of such so that the gaseous solvent can be removed from the circuit and circulate along an optical path 28, after which gaseous solvent is introduced back into the circuit 14. An IR source 30 and an IR detector 32 are located in opposite ends of the optical path 28. The IR source emits energy in the range of absorption bands of D5 and this energy is absorbed by the D5 along the optical path and revealed by the IR detector. See figure 2.

Puede preverse un dispositivo de bombeo 34 para mantener el flujo de gas deseado dentro del perceptor 22 de gas; sin embargo, dicho dispositivo de bombeo puede omitirse en el caso de que el detector esté funcionando en una posición fija, hasta que el gas pueda moverse libremente por el trayecto óptico.A pumping device 34 can be provided for maintain the desired gas flow within the gas sensor 22; however, said pumping device can be omitted in the case that the detector is operating in a fixed position, until The gas can move freely along the optical path.

Ventajosamente, el perceptor 22 de gas está encerrado en un sistema termostático 36 para mantener el trayecto óptico 28 y el dispositivo de bombeo 34 a una temperatura dada.Advantageously, the gas sensor 22 is enclosed in a thermostatic system 36 to maintain the path optic 28 and the pumping device 34 at a given temperature.

Otra característica del invento se representa mediante el uso de una pluralidad de perceptores 22 de gas, con el fin de garantizar no sólo el control del grado de secado durante todo el desarrollo del ciclo funcional sino, también, las mejores condiciones de seguridad para el usuario. A este respecto, un primer perceptor 22A de gas está posicionado cerca del condensador 16 para verificar su funcionamiento regular, y un segundo perceptor 22B de gas está asociado con el calentador 18 que es el punto del circuito que tiene la temperatura más elevada. Un tercer perceptor 22C de gas está posicionado cerca de la abertura de carga de la cuba 10, donde puede darse una posible situación de peligro para el usuario.Another feature of the invention is represented. by using a plurality of gas perceivers 22, with the in order to guarantee not only the control of the degree of drying during all the development of the functional cycle but also the best safety conditions for the user. In this regard, a first gas sensor 22A is positioned near condenser 16 to verify its regular operation, and a second receiver 22B of gas is associated with heater 18 which is the point of the circuit which has the highest temperature. A third perceiver 22C of gas is positioned near the loading opening of the tank 10, where there may be a possible dangerous situation for the Username.

Todos los perceptores 22 de gas están conectados con un dispositivo de control electrónico 38 de cualquier tipo conocido, que trate los datos procedentes de los perceptores y que emita las entradas necesarias para activar la máquina lavadora de limpieza en seco. De preferencia, los perceptores 22 de gas son alimentados selectivamente y sus señales se tratan de forma continua.All gas sensors 22 are connected with an electronic control device 38 of any kind known, that treats the data coming from the recipients and that issue the necessary inputs to activate the washing machine dry cleaning Preferably, the gas receivers 22 are fed selectively and their signals are treated in a way keep going.

Alternativamente, puede utilizarse solamente un perceptor 22 de IR (fig. 3) con solamente un dispositivo 34 de bombeo de gas. En este caso, el perceptor de gas está conectado a través de una válvula 40 de múltiples vías, con los conductos 24 para llevar el gas desde el circuito 14 en los puntos seleccionados del mismo. La válvula 40 de múltiples vías es hecha funcionar selectivamente por el dispositivo de control de la máquina en forma conocida. Solamente un conducto 26 de retorno conecta el perceptor 22 de gas por IR con el circuito 14 para reintroducir el gas en el mismo.Alternatively, only one can be used IR receiver 22 (fig. 3) with only one device 34 of gas pumping In this case, the gas sensor is connected to through a multi-way valve 40, with ducts 24 to carry the gas from circuit 14 at the selected points of the same. The multi-way valve 40 is operated selectively by the machine control device in form known. Only one return conduit 26 connects the sensor 22 of gas by IR with circuit 14 to reintroduce the gas into the same.

Las ventajas del presente invento pueden resumirse como sigue. Se obtiene una medición en tiempo real de la concentración de D5 en la fase gaseosa. Se realiza una medición directa de la concentración, en lugar de una medición derivada, como ocurre al utilizar otras técnicas de muestreo. Es posible la miniaturización de los perceptores, de forma que a la máquina se le pueda aplicar una clase real de perceptor.The advantages of the present invention can Summarize as follows. A real-time measurement of the D5 concentration in the gas phase. A measurement is made direct concentration, instead of a derived measurement, as happens when using other sampling techniques. It is possible the miniaturization of the perceivers, so that the machine is can apply a real kind of perceiver.

Claims (8)

1. Máquina lavadora doméstica de limpieza en seco que comprende una cuba (10) en la que se hace girar un tambor perforado (12) para almacenar prendas de ropa y un circuito cerrado (14) para hacer circular un disolvente lipofílico no acuoso, como el decametilciclopentasiloxano (D5) en una corriente de aire a través del tambor; cuyo circuito comprende un condensador (16), un calentador (18) y un ventilador (20); al menos un perceptor (22) de gas previsto para detectar la concentración de disolvente en el aire, así como para entregar datos relevantes a un dispositivo electrónico (38) para controlar la máquina, caracterizada porque dicho al menos un perceptor (22) de gas es un dispositivo de infrarrojos (IR) posicionado fuera del circuito cerrado (14) para el aire y conectado con él de tal modo que el disolvente gaseoso pueda ser hecho circular a lo largo de un trayecto óptico (28) por el que disolvente circula absorbiendo energía de IR.1. Domestic dry cleaning washing machine comprising a tank (10) in which a perforated drum (12) is rotated to store clothes and a closed circuit (14) to circulate a non-aqueous lipophilic solvent, such as decamethylcyclopentasiloxane (D5) in a stream of air through the drum; whose circuit comprises a condenser (16), a heater (18) and a fan (20); at least one gas sensor (22) intended to detect the concentration of solvent in the air, as well as to deliver relevant data to an electronic device (38) to control the machine, characterized in that said at least one gas sensor (22) it is an infrared (IR) device positioned outside the closed circuit (14) for the air and connected with it so that the gaseous solvent can be circulated along an optical path (28) through which solvent circulates by absorbing IR power 2. Máquina lavadora doméstica de limpieza en seco de acuerdo con la reivindicación 1, caracterizada porque el dispositivo de IR está conectado con el circuito (14) por medio de, al menos, un conducto de entrada (24) y un conducto de salida (26).2. Domestic dry cleaning washing machine according to claim 1, characterized in that the IR device is connected to the circuit (14) by means of at least one inlet duct (24) and one outlet duct ( 26). 3. Máquina lavadora doméstica de limpieza en seco de acuerdo con la reivindicación 1, caracterizada porque el dispositivo de IR comprende una fuente (30) de IR y un detector (32) de IR que están posicionados en extremos opuestos del trayecto óptico (28), la fuente de IR emite energía en el intervalo de las bandas de absorción de D5, y esta energía es absorbida por el D5 a lo largo del trayecto óptico y revelada por el detector de IR.3. domestic washing machine dry cleaning according to claim 1, characterized in that the IR device comprises a source (30) of IR and a detector (32) of IR which are positioned at opposite ends of the optical path (28) , the IR source emits energy in the range of the D5 absorption bands, and this energy is absorbed by the D5 along the optical path and revealed by the IR detector. 4. Máquina lavadora doméstica de limpieza en seco de acuerdo con la reivindicación 1, caracterizada porque el trayecto óptico (28) está contenido en un sistema termostático para mantenerlo a una temperatura dada.4. Domestic dry cleaning washing machine according to claim 1, characterized in that the optical path (28) is contained in a thermostatic system to keep it at a given temperature. 5. Máquina lavadora doméstica de limpieza en seco de acuerdo con la reivindicación 1, caracterizada porque un dispositivo de bombeo (34) está asociado con el trayecto óptico (28) para mantener el flujo de gas deseado.5. Domestic dry cleaning washing machine according to claim 1, characterized in that a pumping device (34) is associated with the optical path (28) to maintain the desired gas flow. 6. Máquina lavadora doméstica de limpieza en seco de acuerdo con la reivindicación 1, caracterizada porque el dispositivo de IR está conectado a través de una válvula (40) de múltiples vías con una pluralidad de conductos (24) para llevar el gas desde el circuito (14) en los puntos seleccionados del mismo, así como con un conducto (26) para reintroducir el gas en el circuito.6. Domestic dry cleaning washing machine according to claim 1, characterized in that the IR device is connected through a multi-way valve (40) with a plurality of ducts (24) to carry the gas from the circuit (14) at the selected points thereof, as well as with a conduit (26) to reintroduce the gas into the circuit. 7. Máquina lavadora doméstica de limpieza en seco de acuerdo con la reivindicación 1, en la que se utilizan una pluralidad de perceptores (22) de gas, caracterizada porque un primer perceptor (22A) de gas está posicionado cerca del condensador (16) para verificar su funcionamiento regular, un segundo perceptor (22B) de gas está asociado al calentador (18) que es el punto del circuito que tiene la temperatura más elevada, y un tercer perceptor (22C) de gas está posicionado cera de la abertura de carga de la cuba (10) donde puede darse una posible situación de peligro para el usuario.7. Domestic dry cleaning washing machine according to claim 1, wherein a plurality of gas sensors (22) are used, characterized in that a first gas sensor (22A) is positioned close to the condenser (16) for verify its regular operation, a second gas sensor (22B) is associated with the heater (18) which is the point of the circuit with the highest temperature, and a third gas sensor (22C) is positioned near the load opening. of the tank (10) where a possible danger situation can occur for the user. 8. Máquina lavadora doméstica de limpieza en seco de acuerdo con la reivindicación 5, caracterizada porque dichos perceptores (22A, 22B, 22C) de gas son alimentados selectivamente y sus señales son tratadas de forma continua por el dispositivo de control electrónico (38).8. Domestic dry cleaning washing machine according to claim 5, characterized in that said gas sensors (22A, 22B, 22C) are fed selectively and their signals are continuously treated by the electronic control device (38).
ES07102542T 2007-02-16 2007-02-16 WASHING MACHINE FOR DRY CLEANING WITH INFRARED GAS DETECTOR. Active ES2338475T3 (en)

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EP07102542A EP1959047B1 (en) 2007-02-16 2007-02-16 Dry-cleaning washing machine with infrared gas detector

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AT (1) ATE455893T1 (en)
DE (1) DE602007004433D1 (en)
ES (1) ES2338475T3 (en)
PL (1) PL1959047T3 (en)
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RU2422570C2 (en) 2011-06-27
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EP1959047A1 (en) 2008-08-20
EP1959047B1 (en) 2010-01-20
ATE455893T1 (en) 2010-02-15

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