EP1674029A1 - Drying process of a dishwasher - Google Patents

Drying process of a dishwasher Download PDF

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Publication number
EP1674029A1
EP1674029A1 EP05112279A EP05112279A EP1674029A1 EP 1674029 A1 EP1674029 A1 EP 1674029A1 EP 05112279 A EP05112279 A EP 05112279A EP 05112279 A EP05112279 A EP 05112279A EP 1674029 A1 EP1674029 A1 EP 1674029A1
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EP
European Patent Office
Prior art keywords
drying
air
desiccant
chamber
washing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP05112279A
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German (de)
French (fr)
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EP1674029B1 (en
Inventor
Bo Ni
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FagorBrandt SAS
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Brandt Industries SAS
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Publication date
Application filed by Brandt Industries SAS filed Critical Brandt Industries SAS
Publication of EP1674029A1 publication Critical patent/EP1674029A1/en
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    • 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
    • A47L15/48—Drying arrangements
    • A47L15/481—Drying arrangements by using water absorbent materials, e.g. Zeolith
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/06—Controlling, e.g. regulating, parameters of gas supply
    • F26B21/08—Humidity
    • F26B21/083—Humidity by using sorbent or hygroscopic materials, e.g. chemical substances, molecular sieves

Definitions

  • the present invention relates to a method of drying crockery used in a washing machine and drying dishes.
  • this invention relates to dishwashers in which a washing cycle of a quantity of dishes is followed by a drying cycle of this dishware.
  • Such a drying method implemented in a dishwashing machine comprises a housing enclosing a washing chamber.
  • the dishes to be washed is placed in at least one basket supported by the washing chamber which has an outlet opening generally formed in the floor of the washing chamber to allow the circulation of water during the various cycles of washing. washing the dishes.
  • a bath heating means is placed in the water treatment circuit of the wash bath.
  • this washing and drying machine is connected to an open air treatment circuit loaded with moisture.
  • This air treatment circuit generally comprises an air circulation duct in communication with the washing chamber in which the dishes are placed.
  • the washing chamber thus constitutes one of the elements of this drying air treatment circuit.
  • At least one fan is mounted in the air treatment circuit, and intended to circulate said air between a collection opening and a discharge opening formed in the washing chamber, said circuit also having an opening air inlet through the housing for introducing air from the atmosphere, and a dewatering means for the air to be treated comprising a chamber.
  • the air passes through the washing chamber and exits through the air intake opening in the vault of the washing chamber to be sucked into the treatment circuit of the washing chamber. 'air.
  • the air treatment circuit comprises a drying air evacuation opening opening at a side of the washing chamber.
  • the discharge opening of the air treatment circuit is located for example on the bottom of the washing chamber.
  • this air intake opening is disposed in an area of the remote washing chamber and on another side of the chamber of the zone where the exhaust air of the air treatment circuit is introduced into the washing chamber.
  • a first means of drying dishes is to dry by natural convection using heating resistors mounted on the bottom of the washing tub of the machine or in the water treatment circuit of the wash bath.
  • a second solution is to dry the dishes using a condenser made in the washing chamber. It is then necessary to evaporate the water in contact with the dishes to circulate a curtain of cold water along at least one of the walls of the washing chamber. This process is complex to implement and expensive. In addition, it does not ensure the best drying performance.
  • a third means of drying is to dry the dishes by forced convection using a fan mounted on the structure of the dishwasher. It is then necessary to provide ventilation ducts for connecting the washing chamber and an air-water exchanger placed outside said washing chamber.
  • drying air flow is not optimized so that the dishwashers of the state of the art have a high energy consumption associated in the two solutions presented with a water consumption at the level of the condenser or air-water exchanger important.
  • the present invention aims to solve the aforementioned drawbacks and to provide a general method of drying the dishes contained in the washing chamber of a dishwasher by minimizing the consumption of energy and water while improving the drying performance.
  • the air drying means comprises a chamber containing a desiccant and means for regenerating said desiccant.
  • a quantity of air coming from the outside is sensed by the air inlet opening during the drying phase and mixed with recirculating air in the treatment circuit. air.
  • This air intake from the outside favors the exchange of heat between the washing chamber and the desiccant chamber and allows the desiccant to extract more quickly the moisture contained in the air.
  • the heating element is constituted by at least one electric heating resistance.
  • the chamber contains two desiccant sheets arranged in parallel, said heating electric resistance being arranged between the two desiccant sheets.
  • washing chamber 1 of a washing machine and drying dishes according to the invention mounted in communication on a drying air ventilation circuit 3 shown only schematically.
  • the assembly is placed in a housing 24 which does not need to be described here.
  • This washing and drying machine first includes a washing tub 1, substantially parallelepiped shape.
  • This washing tank 1 may thus comprise a bottom wall 7, two side walls 25, an arch 27, a sole 26 and a door 2 for closing off the washing tub 1.
  • this washing tub 1 does not need to be strictly parallelepiped shape. It may in particular comprise in its walls remote portions thus forming housings adapted to contain operating members of the machine, such as for example a motor pump intended for the circulation of water and positioned in the lower part of the tank. washing 1.
  • a washing and drying machine also has a drying air treatment circuit 3.
  • This drying air treatment circuit 3 comprises a sheath 10 mounted outside the washing tub 1 and placed in communication with the interior of the washing tub 1.
  • a fan 9 is mounted in the sheath 10 in a suitable place.
  • a chamber 4 containing the desiccant 5 is placed in the air treatment circuit 3 near a drying air outlet orifice 14 placed in the bottom 7 of the washing tub 1.
  • This desiccant may be, in a known manner, a silica gel or activated aluminas allowing the adsorption of the water vapor present in the drying air.
  • heating means 8 are generally placed in the sheath 10 near a drying air introduction orifice in the washing tub 1 to ensure the regeneration of the desiccant 5.
  • the drying air circulation duct 10 thus opens into an air introduction orifice 11 formed on an outer face of the desiccant chamber 4.
  • this air introduction port 11 has the form of a parallelogram.
  • This air introduction orifice 11 serves to introduce air from the washing tub 1.
  • the desiccant chamber 4 described in this embodiment has the following dimensions: 650mm in height L1, 300mm in depth 11 and 25mm in thickness e1. These features are illustrated in Figure 5.
  • the chamber 4 consists of two pairs of desiccant sheets 5 arranged in parallel.
  • the desiccant sheets 5 are activated aluminas.
  • the desiccant sheets 5 are contained in perforated stainless steel housings in direct thermal contact with the heating means 8. Furthermore, the connections between the desiccant sheets 5 and the heating means 8 are made by gluing.
  • the heating means 8 extend within the desiccant sheets 5 of the chamber 4.
  • the heating means 8 comprise two 150W aluminum heating cords each of flat or zigzag shape.
  • These heating cords 8 extend in such a way that they are arranged in contact with the desiccant sheets 5.
  • this assembly of two desiccant sheets 5 and heating cords 8 placed between the two said desiccant sheets form a sandwich 32.
  • the sandwich 32 described in this embodiment has the following dimensions: 600mm high L2, 290mm deep 12 and 10mm thick e2.
  • the desiccant chamber 4 comprises a second sandwich 32 as illustrated in FIG. 7. These desiccant sheets 5 ' thus extend towards the desiccant chamber 4. They are interrupted at a relatively large distance from the faces of the top 28 and bottom 29 of the chamber 4.
  • the distance separating the top face 28 of the desiccant chamber 4 from the upper face 31 of the sandwich 32 may be between 15 and 35 mm, preferably between 20 and 30 mm, and is preferably equal to 25 mm.
  • the distance separating the face of the desiccant sheet 5 from the chamber 4 facing it may be between 1 and 5 mm, and preferably equal to 1.5 mm.
  • the number of sandwiches 32 could be limited to a single sandwich 32 or on the contrary greater than two, in order to adsorb a greater amount of moisture.
  • the desiccant plies 5 are furthermore arranged in such a way that, over their entire length, the heating means 8 are facing each other and at a low distance from each other.
  • the number of heating cords 8 could be limited to a single cord arranged between the desiccant sheets 5 or on the contrary greater than two, in order to increase the temperature in the desiccant chamber 4.
  • the thickness of desiccant sheets 5 is 4mm and that of the heating element 8 is 2mm.
  • the heating means 8 may also be placed at one end of the desiccant chamber 4 as illustrated in FIGS. 3b and 3c. These embodiments can be envisaged for cost reductions in producing the desiccant chamber 4.
  • the air flow passing through the desiccant chamber 4 is sufficiently high to allow the moisture evolved by the desorption to be evacuated and not too powerful to limit the heat losses in the chamber.
  • the purpose is to stabilize the temperature in the desiccant chamber 4 between 80 and 100 ° C.
  • the preferential exit 14 of the air through the bottom 7 of the washing tub 1 makes it possible to increase the quantity of air passing through the entirety of the washing tub 1 from the bottom 7 of the tub 1 to the ceiling 27 of the tub .
  • the exchange between the drying air and the dishes is thus improved.
  • the air preferably circulates from the bottom 29 of the desiccant chamber 4 thanks to the arrangement the air introduction port 18 from the outside to the top 28 of the desiccant chamber 4 by the arrangement of the air outlet orifice 19 by natural convection. This direction of circulation corresponds to the regeneration phase of the desiccant 5.
  • the drying air treatment circuit 3 comprises a second drying air treatment means disposed on the ceiling 27 of the washing tub 1.
  • the drying air treatment circuit 3 comprises a second sheath 10 mounted outside the washing tub 1 and placed in communication with the outside of the dishwasher.
  • a fan 31 is mounted in the sheath 10 in a suitable place.
  • the regeneration air circulation duct 10 opens into an air introduction orifice 17 formed on the same external face including the air introduction orifice 11 of the desiccant chamber 4 as illustrated on FIG. Figure 2.
  • this air introduction orifice 17 has the shape of a parallelogram.
  • This air introduction orifice 17 has the function of bringing air from the outside atmosphere.
  • valves 16a and 16b are adapted to close the communication of the air inlet opening 11 and the air outlet opening 14 between the washing tub 1 and the chamber 4 containing the desiccant 5 of the drying air treatment circuit 3 as described in the previous embodiment illustrated in FIG. 4b.
  • the air circulates preferably from the top 28 of the desiccant chamber 4 thanks to the provision of the air introduction port 17 from the outside to the bottom 29 of the desiccant chamber 4 by the provision of the air outlet orifice 22 by forced convection.
  • heating means 8 are arranged at the inlet 17 of the desiccant chamber 4.
  • the second duct 10 for air circulation coming from outside the dishwasher is in contact with the heating means 8 so as to heat the air circulating on the desiccant sheets 5 during the heating phase. regeneration by forced convection.
  • the heating means 8 are arranged in the upper part 28 of the desiccant chamber 4 as illustrated in FIG. 3b.
  • These heating means 8 are used during the regeneration phase of the desiccant sheets 5 and have the function of increasing the temperature of the desiccant chamber 4 during the regeneration phase.
  • the heating means 8 are arranged at the inlet of the external air introduction orifice 18 of the desiccant chamber 4.
  • the heating means 8 are arranged in the lower part 29 of the desiccant chamber 4 as illustrated in FIG. 3b.
  • valves 16a, 16b are mounted in the drying air treatment circuit 3. These valves 16a, 16b can occupy two positions in this embodiment. In a first position of the valve 16a, the air introduction orifice 11 is placed in communication with the drying air treatment circuit 3. This first position of the valve 16a corresponds to the open position. Similarly for the valve 16b, the air outlet port 14 is in communication with the washing tub 1. This first position of the valve 16b corresponds to the open position.
  • valves 16a, 16b are adapted to close substantially the air communication between the washing tub 1 and the desiccant chamber 4.
  • valves 16a, 16b make it possible to isolate the desiccant chamber 4 from the drying air treatment circuit 3.
  • the moisture saturated desiccant webs of the desiccant chamber 4 can be regenerated before being used to adsorb the moisture of the air from the wash tub 1 during a next wash cycle of the desiccant chamber 4. washing up.
  • an ambient air inlet 18 and an outward air outlet 19 are provided in the desiccant chamber 4.
  • the desiccant 5 is regenerated by natural convection with a flow of air from outside.
  • the washing tub 1 and the desiccant chamber 4 are placed in communication with one another so that the orifices 11 and 14 may be placed in communication with the drying air treatment circuit 3.
  • valves 16a and 16b make it possible to circulate the air between the desiccant chamber 4 and the washing tub 1.
  • the orifices 18 and 19 are not clogged during the drying phase of the dishes contained in the vat. 1.
  • the said orifices 18 and 19 are also used for the regeneration phase of the desiccant 5.
  • valves 16a and 16b can thus be placed in one or the other of these positions during a drying cycle of the dishes.
  • a drying method and its different phases can be implemented after a wash phase of a dishwashing cycle.
  • this drying method may comprise firstly a drying phase during which the valves 16a and 16b mounted in the drying air treatment circuit 3 are placed in their first position.
  • Said first position for the two valves 16a and 16b corresponds to a position in which the air introduction orifice 11 opening into the desiccant chamber 4 and the air outlet orifice 14 are put in communication with the drying air treatment circuit 3.
  • This phase of the drying process illustrated in FIG. 4a corresponds to the adsorption phase of the steam of the tank of the washing tank 1 by the desiccant sheets 5.
  • An unloaded air supply port 30 is provided in the lower portion of one side of the wash tub 1 to improve the drying performance of the dishes. This air intake port can also be in the counter door of the dishwasher.
  • This air intake that is not loaded with moisture is preferably introduced into the drying air treatment circuit 3 by venturi effect or by means of a second fan 31 mounted in a second ventilation duct at a suitable location. as shown in Figure 8.
  • the proportion of air coming from the outside with respect to the humid air volume of the washing chamber is of the order of 30%.
  • An air outlet orifice 22 is provided in the desiccant chamber 4 for evacuating part of the recirculating air in the drying treatment circuit 3.
  • This air outlet orifice 22 will be more widely described later in this document.
  • valves 16a and 16b are placed in a second position as illustrated in FIG. 4b, that is to say in a position where the washing tank 1 is isolated from the treatment circuit. air drying.
  • the regeneration air passing through the desiccant chamber 4 preferentially exits the outside of the washing machine and dry the dishes.
  • This regeneration phase requires an ambient air inlet 18 and an outward air outlet 19 formed in the desiccant chamber 4 to allow air to flow through the desiccant chamber 4.
  • This natural regeneration step of the desiccant 5 consists of two steps.
  • the first regeneration step of the desiccant 5, the natural regeneration, takes place between two washing cycles of the dishes.
  • the time required for the regeneration of the desiccant by natural convection is of the order of 23 hours. During this step, the heating elements 8 are not in operation.
  • This step consumes no energy and allows the desiccant sheets to partially regenerate.
  • a second step is to put into operation the heating elements 8 during the washing phase of the next cycle.
  • a second drying process can be set up to perform regeneration by forced convection.
  • valves 16a and 16b are in said second position corresponding to the closing of the air introduction and air outlet openings 14 of the drying air treatment circuit 3.
  • An air intake that is not loaded with moisture is provided in order to regenerate the desiccant sheets 5 by an air introduction orifice 17.
  • valves 16a and 16b make it possible to isolate the desiccant chamber 4 from the washing tank 1 and the air inlet via the air introduction orifice 17 gives the possibility of regenerating the desiccant sheets 5 by forced convection.
  • the regeneration air is introduced into the desiccant chamber 4 by the air introduction orifice 17.
  • This air comes from the outside so as not to load the desiccant sheets 5 with moisture. .
  • This air from outside is sucked by the fan 9 and passes through the desiccant chamber 4 to exit through an air outlet orifice 22 formed in the bottom 13 of the chamber 4 of the desiccant 5.
  • This air outlet orifice 22 may also be placed on a vertical wall of the desiccant chamber 4.
  • This second regeneration phase can be performed during the wash cycle.
  • This level of temperature is necessary to ensure that the water evaporates sufficiently during the drying period because the air which is recirculated in the washing chamber 1 is constantly loaded with moisture.
  • the heating temperature of the structure of the machine, the dishes and the bath is lower.
  • the recirculated air in the washing chamber 1 is dried by the desiccant 5 during the circulation of said air through the desiccant chamber 4 and allows the dishes to dry more efficiently at a lower temperature.
  • the operation of the drying device by desiccation can be used up to a temperature of 15 ° C without deteriorating the drying performance.
  • the heating means operated during the hot rinsing phase are independent of the heating elements 8 placed in the desiccant chamber 4.
  • the heating elements 8 are not put into operation.
  • the desiccant webs adsorb moisture without requiring heat input from the heating elements 8.
  • the dish heating means contained in the washing tub 1 are not operated.
  • the supply of heat transmitted by the hot rinsing water is stored by the dishes and is sufficient for the evaporation of said rinsing water during the drying phase.
  • the forced convection regeneration phase is carried out during the washing phase of the next cycle.
  • the heating of the desiccant 5 in the chamber 4 is done at the same time as the heating of the dishes in the washing tub 1.
  • the energy gain measured during validation tests of the invention is 170Wh on a washing and drying cycle.
  • the positioning of the heating means 8 may be different from the embodiments described.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Washing And Drying Of Tableware (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

The method involves heating crockery in a washing tank (1) of a dishwasher using heating units placed in an adsorption chamber (4) of a drying air processing circuit (3), and stopping the heating unit. The tank is aerated using a fan (9), during drying phase, by allowing air from the circuit and across the chamber. A desiccant cloth placed in the chamber is heated while the crockery is heated.

Description

La présente invention concerne un procédé de séchage de vaisselle mis en oeuvre dans une machine à laver et sécher la vaisselle.The present invention relates to a method of drying crockery used in a washing machine and drying dishes.

De manière générale, cette invention concerne les lave-vaisselle dans lesquels un cycle de lavage d'une quantité de vaisselle est suivi d'un cycle de séchage de cette vaisselle.In general, this invention relates to dishwashers in which a washing cycle of a quantity of dishes is followed by a drying cycle of this dishware.

Elle concerne tant les lave-vaisselle encastrés que posables.It concerns both built-in and posable dishwashers.

Un tel procédé de séchage mis en en oeuvre dans une machine à laver la vaisselle comprend un boîtier renfermant une enceinte de lavage.Such a drying method implemented in a dishwashing machine comprises a housing enclosing a washing chamber.

La vaisselle destinée à être lavée est placée dans au moins un panier supporté par l'enceinte de lavage qui comporte une ouverture de sortie généralement ménagée dans la sole de l'enceinte de lavage pour permettre la circulation de l'eau lors des différents cycles de lavage de la vaisselle.The dishes to be washed is placed in at least one basket supported by the washing chamber which has an outlet opening generally formed in the floor of the washing chamber to allow the circulation of water during the various cycles of washing. washing the dishes.

Un moyen de chauffage du bain est placé dans le circuit de traitement de l'eau du bain de lavage.A bath heating means is placed in the water treatment circuit of the wash bath.

Parallèlement, au circuit de lavage de la vaisselle, cette machine à laver et sécher la vaisselle est connectée à un circuit ouvert de traitement de l'air chargé en humidité. Ce circuit de traitement de l'air comporte généralement une conduite de circulation d'air en communication avec l'enceinte de lavage dans laquelle est placée la vaisselle. L'enceinte de lavage constitue ainsi un des éléments de ce circuit de traitement de l'air de séchage.Meanwhile, in the dishwashing circuit, this washing and drying machine is connected to an open air treatment circuit loaded with moisture. This air treatment circuit generally comprises an air circulation duct in communication with the washing chamber in which the dishes are placed. The washing chamber thus constitutes one of the elements of this drying air treatment circuit.

Traditionnellement, au moins un ventilateur est monté dans le circuit de traitement de l'air, et destiné à faire circuler ledit air entre une ouverture de captage et une ouverture d'évacuation ménagées dans l'enceinte de lavage, ledit circuit comportant aussi une ouverture d'entrée d'air au travers du boîtier pour introduire de l'air de l'ambiance, et un moyen d'assèchement de l'air à traiter comprenant une chambre.Traditionally, at least one fan is mounted in the air treatment circuit, and intended to circulate said air between a collection opening and a discharge opening formed in the washing chamber, said circuit also having an opening air inlet through the housing for introducing air from the atmosphere, and a dewatering means for the air to be treated comprising a chamber.

Dans les machines de l'art antérieur, l'air traverse l'enceinte de lavage et sort par l'ouverture de captage de l'air ménagée dans la voûte de l'enceinte de lavage pour être aspiré dans le circuit de traitement de l'air.In the machines of the prior art, the air passes through the washing chamber and exits through the air intake opening in the vault of the washing chamber to be sucked into the treatment circuit of the washing chamber. 'air.

Afin d'amener l'air de séchage dans l'enceinte de lavage, le circuit de traitement de l'air comprend une ouverture d'évacuation d'air de séchage débouchant au niveau d'un flanc de l'enceinte de lavage.In order to bring the drying air into the washing chamber, the air treatment circuit comprises a drying air evacuation opening opening at a side of the washing chamber.

Dans une machine à laver et sécher la vaisselle, l'ouverture d'évacuation du circuit de traitement de l'air est située par exemple sur le fond de l'enceinte de lavage.In a washing machine and drying dishes, the discharge opening of the air treatment circuit is located for example on the bottom of the washing chamber.

Généralement, cette ouverture de captage de l'air est disposée dans une zone de l'enceinte de lavage éloignée et sur un autre flanc de l'enceinte de la zone où l'air d'évacuation du circuit de traitement de l'air est introduit dans l'enceinte de lavage.Generally, this air intake opening is disposed in an area of the remote washing chamber and on another side of the chamber of the zone where the exhaust air of the air treatment circuit is introduced into the washing chamber.

Afin de réaliser ce cycle de séchage de la vaisselle dans la cuve de lavage du lave-vaisselle, il existe trois types de séchage de la vaisselle.In order to carry out this drying cycle of the dishes in the washing tub of the dishwasher, there are three types of drying dishes.

Un premier moyen de séchage de la vaisselle consiste à sécher par convection naturelle à l'aide de résistances électriques chauffantes montées sur le fond de la cuve de lavage de la machine ou dans le circuit de traitement de l'eau du bain de lavage.A first means of drying dishes is to dry by natural convection using heating resistors mounted on the bottom of the washing tub of the machine or in the water treatment circuit of the wash bath.

Ce type de solution présente les inconvénients de ne pas être économique en énergie.This type of solution has the disadvantages of not being energy efficient.

Une deuxième solution consiste à sécher la vaisselle à l'aide d'un condenseur réalisé dans l'enceinte de lavage. Il est alors nécessaire pour évaporer l'eau en contact avec la vaisselle de faire circuler un rideau d'eau froide le long d'au moins une des parois de l'enceinte de lavage. Ce procédé est complexe à mettre en oeuvre et coûteux. De plus, il n'assure pas l'obtention de la meilleure performance de séchage.A second solution is to dry the dishes using a condenser made in the washing chamber. It is then necessary to evaporate the water in contact with the dishes to circulate a curtain of cold water along at least one of the walls of the washing chamber. This process is complex to implement and expensive. In addition, it does not ensure the best drying performance.

Un troisième moyen de séchage consiste à sécher la vaisselle par convection forcée à l'aide d'un ventilateur monté sur la structure du lave-vaisselle. Il est alors nécessaire de prévoir des conduites de ventilation permettant de relier l'enceinte de lavage et un échangeur air - eau placé à l'extérieur de ladite enceinte de lavage.A third means of drying is to dry the dishes by forced convection using a fan mounted on the structure of the dishwasher. It is then necessary to provide ventilation ducts for connecting the washing chamber and an air-water exchanger placed outside said washing chamber.

Ce type de solution présente cependant les inconvénients liés à la présence du ventilateur et de l'échangeur air - eau, encombrants, générateur de bruit pour ledit ventilateur et coûteux.This type of solution, however, has the disadvantages associated with the presence of the fan and the air-water heat exchanger, bulky, noise generator for said fan and expensive.

L'utilisation du flux d'air de séchage n'est pas optimisée de telle sorte que les lave-vaisselle de l'état de la technique présentent une consommation énergétique élevée associée dans les deux solutions présentées à une consommation d'eau au niveau du condenseur ou de l'échangeur air - eau importante.The use of the drying air flow is not optimized so that the dishwashers of the state of the art have a high energy consumption associated in the two solutions presented with a water consumption at the level of the condenser or air-water exchanger important.

Ces consommations énergétiques élevées s'expliquent par le fait qu'il est nécessaire d'avoir une température de séchage élevée pour obtenir un séchage correct de la vaisselle.These high energy consumptions are explained by the fact that it is necessary to have a high drying temperature to obtain a correct drying of the dishes.

La présente invention a pour but de résoudre les inconvénients précités et de proposer d'une manière générale un procédé de séchage de la vaisselle contenue dans l'enceinte de lavage d'un lave-vaisselle en minimisant la consommation d'énergie et d'eau tout en améliorant les performances de séchage.The present invention aims to solve the aforementioned drawbacks and to provide a general method of drying the dishes contained in the washing chamber of a dishwasher by minimizing the consumption of energy and water while improving the drying performance.

A cet effet, la présente invention vise un procédé de séchage de la vaisselle mis en oeuvre dans une machine à laver et sécher la vaisselle comprend un boîtier renfermant une enceinte de lavage connecté à un circuit ouvert de traitement de l'air chargé en humidité et comportant au moins un ventilateur destiné à faire circuler ledit air entre une ouverture de captage et une ouverture d'évacuation, ledit circuit comportant une ouverture d'entrée d'air au travers du boîtier, un moyen d'assèchement de l'air à traiter.For this purpose, the present invention is directed to a method of drying the dishes used in a washing machine and drying the dishes comprises a housing enclosing a washing chamber connected to an open circuit for treating the air loaded with moisture and having at least one fan for circulating said air between a collection opening and a discharge opening, said circuit having an air inlet opening through the housing, a means for drying the air to be treated .

Selon l'invention, le procédé de séchage comprend les étapes suivantes :

  • chauffage par des moyens de chauffage de la structure, du bain et de la vaisselle ;
  • arrêt desdits moyens de chauffage ;
  • ventilation de l'enceinte de lavage par le ventilateur lors de la phase de séchage permettant à l'air de circuit de traitement de l'air et de traverser la chambre de dessiccant.
According to the invention, the drying process comprises the following steps:
  • heating by means of heating the structure, the bath and the dishes;
  • stopping said heating means;
  • ventilation of the washing chamber by the fan during the drying phase allowing the air of the air treatment circuit and to pass through the desiccant chamber.

Ainsi, en faisant suivre une étape de séchage de la vaisselle après une étape de lavage de la vaisselle permet de profiter de la quantité de chaleur transmise à la vaisselle pour économiser de l'énergie et accélérer le processus de séchage.Thus, following a drying step of the dishes after a dishwashing step can take advantage of the amount of heat transmitted to the dishes to save energy and speed up the drying process.

Selon une caractéristique préférée de l'invention, le moyen d'assèchement de l'air comprend une chambre contenant un dessiccant et un moyen de régénération dudit dessiccant.According to a preferred feature of the invention, the air drying means comprises a chamber containing a desiccant and means for regenerating said desiccant.

Selon une autre caractéristique préférée de l'invention, une quantité d'air provenant de l'extérieur est captée par l'ouverture d'entrée d'air pendant la phase de séchage et mélangée à l'air en recirculation dans le circuit de traitement de l'air.According to another preferred feature of the invention, a quantity of air coming from the outside is sensed by the air inlet opening during the drying phase and mixed with recirculating air in the treatment circuit. air.

Cet apport d'air de l'extérieur favorise les échanges de chaleur entre l'enceinte de lavage et la chambre de dessiccant et permet au dessiccant d'extraire plus rapidement l'humidité contenue dans l'air.This air intake from the outside favors the exchange of heat between the washing chamber and the desiccant chamber and allows the desiccant to extract more quickly the moisture contained in the air.

Selon une autre caractéristique préférée de l'invention, l'élément chauffant est constitué par au moins une résistance électrique chauffante. Préférentiellement, la chambre contient deux nappes de dessiccant agencées parallèlement, ladite résistance électrique chauffante étant agencée entre les deux nappes de dessiccant.According to another preferred feature of the invention, the heating element is constituted by at least one electric heating resistance. Preferably, the chamber contains two desiccant sheets arranged in parallel, said heating electric resistance being arranged between the two desiccant sheets.

Cette disposition des éléments chauffants noyés dans des dessiccants permet de réduire les pertes de chaleur et de garantir une montée en température du dessiccant plus efficace.This arrangement of the heating elements embedded in desiccants makes it possible to reduce the heat losses and to guarantee a more efficient drying of the desiccant.

D'autres particularités et avantages de l'invention apparaîtront encore dans la description ci-après.Other features and advantages of the invention will become apparent in the description below.

Aux dessins annexés, donnés à titre d'exemple, non limitatifs :

  • la figure 1 est une vue en coupe longitudinale d'une machine à laver et sécher la vaisselle conforme à un mode de réalisation de l'invention ;
  • la figure 2 est une vue en perspective de la chambre contenant le dessiccant ;
  • la figure 3a est une vue en coupe longitudinale de la chambre contenant le dessiccant et un moyen de régénération placé au coeur du dessiccant ;
  • la figure 3b est une vue en coupe longitudinale de la chambre contenant le dessiccant et un moyen de régénération placé en amont du dessiccant ;
  • la figure 3c est une vue en coupe longitudinale de la chambre contenant le dessiccant et un moyen de régénération placé en aval du dessiccant ;
  • la figure 4a est une vue en coupe longitudinale de la chambre contenant le dessiccant lors de la phase d'adsorption ;
  • la figure 4b est une vue en coupe de la chambre contenant le dessiccant lors de la phase de régénération par convection naturelle ;
  • la figure 4c est une vue en coupe de la chambre contenant le dessiccant lors de la phase de régénération par convection forcée ;
  • la figure 5 est une vue en perspective de la chambre contenant le dessiccant présentant les dimensions de celle-ci ;
  • la figure 6 est une vue en perspective du sandwich formé par des nappes de dessiccant et des moyens de chauffage ;
  • la figure 7 est une vue en coupe de la chambre contenant le dessiccant illustrant le positionnement d'un sandwich formé par des nappes de dessiccant et des moyens de chauffage ;
  • la figure 8 est une vue schématique en perspective d'une chambre de dessiccant assemblée sur une cuve de lavage d'une machine à laver et sécher la vaisselle conforme à un mode de réalisation de l'invention.
In the accompanying drawings, given by way of example, non-limiting:
  • Figure 1 is a longitudinal sectional view of a washing machine and drying dishes according to one embodiment of the invention;
  • Figure 2 is a perspective view of the chamber containing the desiccant;
  • Figure 3a is a longitudinal sectional view of the chamber containing the desiccant and a regeneration means placed in the heart of the desiccant;
  • Figure 3b is a longitudinal sectional view of the chamber containing the desiccant and a regeneration means placed upstream of the desiccant;
  • Figure 3c is a longitudinal sectional view of the chamber containing the desiccant and a regeneration means placed downstream of the desiccant;
  • Figure 4a is a longitudinal sectional view of the chamber containing the desiccant during the adsorption phase;
  • Figure 4b is a sectional view of the chamber containing the desiccant during the regeneration phase by natural convection;
  • Figure 4c is a sectional view of the chamber containing the desiccant during the regeneration phase by forced convection;
  • Figure 5 is a perspective view of the chamber containing the desiccant having the dimensions thereof;
  • Figure 6 is a perspective view of the sandwich formed by desiccant sheets and heating means;
  • Figure 7 is a sectional view of the chamber containing the desiccant illustrating the positioning of a sandwich formed by desiccant sheets and heating means;
  • Figure 8 is a schematic perspective view of a desiccant chamber assembled on a washing tub of a washing machine and drying dishes according to one embodiment of the invention.

On va décrire tout d'abord un premier mode de réalisation de l'invention en référence aux figures 1 à 3a.We will first describe a first embodiment of the invention with reference to Figures 1 to 3a.

On a représenté pour décrire l'invention une enceinte de lavage 1 d'une machine à laver et sécher la vaisselle conforme à l'invention, montée en communication sur un circuit de ventilation d'air de séchage 3 représenté uniquement de manière schématique.There is shown to describe the invention a washing chamber 1 of a washing machine and drying dishes according to the invention, mounted in communication on a drying air ventilation circuit 3 shown only schematically.

Bien entendu, l'ensemble est placé dans un boîtier 24 qui n'a pas besoin d'être décrit ici.Of course, the assembly is placed in a housing 24 which does not need to be described here.

En outre, l'ensemble des autres moyens nécessaires au fonctionnement d'une machine à laver et sécher la vaisselle, tels que, par exemple, les moyens de commande, d'alimentation électrique et d'alimentation en eau, ne sont pas représentés ou décrits dès lors qu'ils peuvent être identiques à ceux bien connus de l'homme du métier dans ce domaine.In addition, all other means necessary for the operation of a washing machine and drying dishes, such as, for example, the control means, power supply and water supply, are not represented or described when they can be identical to those well known to those skilled in this field.

Cette machine à laver et sécher la vaisselle comprend tout d'abord une cuve de lavage 1, de forme sensiblement parallélépipédique. Cette cuve de lavage 1 peut comporter ainsi une paroi de fond 7, deux flancs de côté 25, une voûte 27, une sole 26 et une porte 2 permettant d'obturer la cuve de lavage 1.This washing and drying machine first includes a washing tub 1, substantially parallelepiped shape. This washing tank 1 may thus comprise a bottom wall 7, two side walls 25, an arch 27, a sole 26 and a door 2 for closing off the washing tub 1.

Bien entendu, cette cuve de lavage 1 n'a pas besoin d'être de forme strictement parallélépipédique. Elle peut en particulier comporter dans ses parois des portions déportées formant ainsi des logements adaptés à contenir des organes de fonctionnement de la machine, tels que par exemple une motopompe destinée à la circulation de l'eau et positionnée dans la partie basse de la cuve de lavage 1.Of course, this washing tub 1 does not need to be strictly parallelepiped shape. It may in particular comprise in its walls remote portions thus forming housings adapted to contain operating members of the machine, such as for example a motor pump intended for the circulation of water and positioned in the lower part of the tank. washing 1.

Une machine à laver et sécher la vaisselle comporte également un circuit de traitement de l'air de séchage 3.A washing and drying machine also has a drying air treatment circuit 3.

Ce circuit de traitement de l'air de séchage 3 comporte une gaine 10 montée à l'extérieur de la cuve de lavage 1 et mise en communication avec l'intérieur de la cuve de lavage 1.This drying air treatment circuit 3 comprises a sheath 10 mounted outside the washing tub 1 and placed in communication with the interior of the washing tub 1.

Afin d'assurer la circulation de l'air de séchage dans cette gaine 10, un ventilateur 9 est monté dans la gaine 10 en un endroit approprié.In order to ensure the circulation of the drying air in this sheath 10, a fan 9 is mounted in the sheath 10 in a suitable place.

En outre, une chambre 4 contenant le dessiccant 5 est placée dans le circuit de traitement de l'air 3 à proximité d'un orifice 14 de sortie d'air de séchage placé dans le fond 7 de la cuve de lavage 1.In addition, a chamber 4 containing the desiccant 5 is placed in the air treatment circuit 3 near a drying air outlet orifice 14 placed in the bottom 7 of the washing tub 1.

Ce dessiccant 5 peut être, de manière connue, un gel de silice ou des alumines activées permettant l'adsorption de la vapeur d'eau présente dans l'air de séchage.This desiccant may be, in a known manner, a silica gel or activated aluminas allowing the adsorption of the water vapor present in the drying air.

Enfin, des moyens de chauffage 8 sont généralement placés dans la gaine 10 à proximité d'un orifice d'introduction d'air de séchage dans la cuve de lavage 1 afin d'assurer la régénération du dessiccant 5.Finally, heating means 8 are generally placed in the sheath 10 near a drying air introduction orifice in the washing tub 1 to ensure the regeneration of the desiccant 5.

Ces différents moyens de traitement de l'air de séchage dans la gaine 10 de circulation d'air, constitués d'une chambre 4 contenant le dessiccant 5, d'un ventilateur 9 et de moyens de chauffage 8, sont seulement indiqués à titre non limitatif dans ce mode de réalisation.These various means for treating the drying air in the air circulation duct 10, consisting of a chamber 4 containing the desiccant 5, a fan 9 and heating means 8, are only indicated as non-existent. in this embodiment.

On va décrire à présent plus particulièrement en référence à la figure 2, les orifices d'introduction de l'air de séchage à partir du circuit de traitement de l'air de séchage 3 qui débouchent dans la chambre 4 contenant le dessiccant 5.2, the openings for introducing the drying air from the drying air treatment circuit 3 which open into the chamber 4 containing the desiccant 5 will now be described more particularly with reference to FIG.

La gaine 10 de circulation d'air de séchage débouche ainsi dans un orifice d'introduction d'air 11 ménagé sur une face externe de la chambre 4 de dessiccant 5.The drying air circulation duct 10 thus opens into an air introduction orifice 11 formed on an outer face of the desiccant chamber 4.

Ici, et de manière nullement limitative, cet orifice d'introduction d'air 11 a la forme d'un parallélogramme.Here, and in no way limiting, this air introduction port 11 has the form of a parallelogram.

Cet orifice d'introduction d'air 11 a pour fonction de faire entrer de l'air de la cuve de lavage 1.This air introduction orifice 11 serves to introduce air from the washing tub 1.

On va décrire à présent, en référence plus particulièrement à la figure 3a, la chambre 4 de dessiccant 5.We will now describe, with particular reference to FIG. 3a, the desiccant chamber 4.

Par exemple, la chambre 4 de dessiccant 5 décrite dans ce mode de réalisation présente les dimensions suivantes : 650mm de hauteur L1, 300mm de profondeur 11 et 25mm d'épaisseur e1. Ces caractéristiques sont illustrées sur la figure 5.For example, the desiccant chamber 4 described in this embodiment has the following dimensions: 650mm in height L1, 300mm in depth 11 and 25mm in thickness e1. These features are illustrated in Figure 5.

Dans ce mode de réalisation, la chambre 4 est constituée de deux paires de nappes de dessiccant 5 agencées parallèlement.In this embodiment, the chamber 4 consists of two pairs of desiccant sheets 5 arranged in parallel.

Préférentiellement, les nappes de dessiccant 5 sont des alumines activées.Preferably, the desiccant sheets 5 are activated aluminas.

Ainsi, les nappes de dessiccant 5 sont contenues dans des boîtiers en inox perforé en contact thermique direct avec les moyens de chauffage 8. Par ailleurs, les liaisons entre les nappes de dessiccant 5 et les moyens de chauffage 8 sont réalisées par collage.Thus, the desiccant sheets 5 are contained in perforated stainless steel housings in direct thermal contact with the heating means 8. Furthermore, the connections between the desiccant sheets 5 and the heating means 8 are made by gluing.

Dans le mode de réalisation tel qu'illustré à la figure 3, les moyens de chauffage 8 s'étendent au sein des nappes de dessiccant 5 de la chambre 4.In the embodiment as illustrated in FIG. 3, the heating means 8 extend within the desiccant sheets 5 of the chamber 4.

Les moyens de chauffage 8 comprennent deux cordons chauffants sous aluminium de 150W chacun de forme plate ou zigzag.The heating means 8 comprise two 150W aluminum heating cords each of flat or zigzag shape.

Ces cordons chauffants 8 s'étendent de telle sorte qu'ils sont agencés au contact des nappes de dessiccant 5.These heating cords 8 extend in such a way that they are arranged in contact with the desiccant sheets 5.

Comme bien illustré sur la figure 6, cet assemblage de deux nappes de dessiccant 5 et des cordons de chauffage 8 placés entre les deux dites nappes de dessiccant forment un sandwich 32.As well illustrated in FIG. 6, this assembly of two desiccant sheets 5 and heating cords 8 placed between the two said desiccant sheets form a sandwich 32.

Par exemple, le sandwich 32 décrit dans ce mode de réalisation présente les dimensions suivantes : 600mm de hauteur L2, 290mm de profondeur 12 et 10mm d'épaisseur e2.For example, the sandwich 32 described in this embodiment has the following dimensions: 600mm high L2, 290mm deep 12 and 10mm thick e2.

En outre, afin d'améliorer encore l'efficacité du séchage de la machine à laver et sécher la vaisselle, la chambre 4 de dessiccant 5 comporte un second sandwich 32 tel qu'illustré sur la figure 7. Ces nappes de dessiccant 5 s'étendent ainsi en direction de la chambre 4 de dessiccant 5. Elles s'interrompent à une distance relativement importante des faces du dessus 28 et du dessous 29 de la chambre 4.Furthermore, in order to further improve the drying efficiency of the washing machine and to dry the dishes, the desiccant chamber 4 comprises a second sandwich 32 as illustrated in FIG. 7. These desiccant sheets 5 ' thus extend towards the desiccant chamber 4. They are interrupted at a relatively large distance from the faces of the top 28 and bottom 29 of the chamber 4.

La distance séparant la face du dessus 28 de la chambre 4 de dessiccant 5 de la face supérieure 31 du sandwich 32 peut être comprise entre 15 et 35mm, de préférence entre 20 et 30mm, et est de préférence égale à 25mm.The distance separating the top face 28 of the desiccant chamber 4 from the upper face 31 of the sandwich 32 may be between 15 and 35 mm, preferably between 20 and 30 mm, and is preferably equal to 25 mm.

La distance entre ces deux surfaces permet d'assurer une bonne circulation d'air en entrée de la chambre 4 de dessiccant 5.The distance between these two surfaces makes it possible to ensure good air circulation at the inlet of the desiccant chamber 4.

La distance séparant la face de la nappe dessiccant 5 de la chambre 4 qui lui fait face peut être comprise entre 1 et 5 mm, et de préférence égale à 1,5mm.The distance separating the face of the desiccant sheet 5 from the chamber 4 facing it may be between 1 and 5 mm, and preferably equal to 1.5 mm.

Ces nappes de dessiccant 5 sont ainsi disposées de manière à être alignées, leurs surfaces haute et basse sont dans un même plan.These desiccant sheets 5 are thus arranged to be aligned, their upper and lower surfaces are in the same plane.

Elles sont en outre disposées de telle sorte que, sur au moins une portion de leur longueur, elles se trouvent en vis-à-vis et à faible distance l'une de l'autre. Ces nappes de dessiccant 5 forment ainsi un obstacle permettant de ralentir le passage de l'air.They are further arranged so that, over at least a portion of their length, they are in facing relation and at a short distance from one another. These desiccant sheets 5 thus form an obstacle to slow the passage of air.

Par ailleurs, le nombre de sandwichs 32 pourrait être limité à un seul sandwich 32 ou au contraire supérieur à deux, afin d'adsorber une plus grande quantité d'humidité.Moreover, the number of sandwiches 32 could be limited to a single sandwich 32 or on the contrary greater than two, in order to adsorb a greater amount of moisture.

Ces deux cordons de chauffage 8 sont ainsi parallèles aux nappes de dessiccant 5. Les nappes de dessiccant 5 sont en outre disposées de telle sorte que, sur toute leur longueur, les moyens de chauffage 8 se trouvent en vis-à-vis et à faible distance l'un de l'autre.These two heating cords 8 are thus parallel to the desiccant plies 5. The desiccant plies 5 are furthermore arranged in such a way that, over their entire length, the heating means 8 are facing each other and at a low distance from each other.

Par ailleurs, le nombre de cordons chauffants 8 pourrait être limité à un seul cordon disposé entre les nappes de dessiccant 5 ou au contraire supérieur à deux, afin d'augmenter la température dans la chambre 4 de dessiccant 5.Moreover, the number of heating cords 8 could be limited to a single cord arranged between the desiccant sheets 5 or on the contrary greater than two, in order to increase the temperature in the desiccant chamber 4.

Par exemple, l'épaisseur de nappes de dessiccant 5 est de 4mm et celle de l'élément chauffant 8 est de 2mm.For example, the thickness of desiccant sheets 5 is 4mm and that of the heating element 8 is 2mm.

Les moyens de chauffage 8 peuvent aussi être placées à l'un des extrémités de la chambre 4 de dessiccant 5 tel qu'illustré sur les figures 3b et 3c. Ces réalisations peuvent être envisagées pour des réductions de coût de réalisation de la chambre 4 de dessiccant 5.The heating means 8 may also be placed at one end of the desiccant chamber 4 as illustrated in FIGS. 3b and 3c. These embodiments can be envisaged for cost reductions in producing the desiccant chamber 4.

Afin d'optimiser la régénération du dessiccant 5, le flux d'air traversant la chambre 4 de dessiccant 5 est suffisamment élevé pour permettre d'évacuer l'humidité dégagée par la désorption et pas trop puissant pour limiter les pertes de chaleur dans la chambre 4 de dessiccant 5. Le but est de stabiliser la température dans la chambre 4 de dessiccant 5 entre 80 et 100°C. Ces conditions sont bien remplies en utilisant un débit d'air inférieur à 10m3/h et plus précisément de l'ordre de 5m3/h pendant la phase de régénération.In order to optimize the regeneration of the desiccant 5, the air flow passing through the desiccant chamber 4 is sufficiently high to allow the moisture evolved by the desorption to be evacuated and not too powerful to limit the heat losses in the chamber. The purpose is to stabilize the temperature in the desiccant chamber 4 between 80 and 100 ° C. These conditions are well met by using an air flow rate of less than 10 m 3 / h and more precisely of the order of 5 m 3 / h during the regeneration phase.

On va décrire à présent, en référence plus particulièrement à la figure 3a, les orifices de sortie de l'air de séchage à partir de la chambre 4 contenant le dessiccant 5 qui débouchent dans le circuit 3 de traitement de l'air de séchage.We will now describe, with reference more particularly to Figure 3a, the drying air outlets from the chamber 4 containing the desiccant 5 which open into the circuit 3 for treating the drying air.

La sortie préférentielle 14 de l'air par le fond 7 de la cuve de lavage 1 permet d'accroître la quantité d'air traversant l'intégralité de la cuve de lavage 1 du fond 7 de la cuve 1 au plafond 27 de la cuve. L'échange entre l'air de séchage et la vaisselle est ainsi amélioré.The preferential exit 14 of the air through the bottom 7 of the washing tub 1 makes it possible to increase the quantity of air passing through the entirety of the washing tub 1 from the bottom 7 of the tub 1 to the ceiling 27 of the tub . The exchange between the drying air and the dishes is thus improved.

Comme bien illustré sur la figure 4b par les flèches illustrant le cheminement principal de l'air de régénération au travers de la chambre 4 de dessiccant 5, l'air circule de préférence du fond 29 de la chambre 4 de dessiccant 5 grâce à la disposition de l'orifice d'introduction d'air de l'extérieur 18 vers le haut 28 de la chambre 4 de dessiccant 5 grâce à la disposition de l'orifice de sortie d'air 19 par convection naturelle. Ce sens de circulation correspond à la phase de régénération du dessiccant 5.As is well illustrated in FIG. 4b by the arrows illustrating the main path of the regeneration air through the desiccant chamber 4, the air preferably circulates from the bottom 29 of the desiccant chamber 4 thanks to the arrangement the air introduction port 18 from the outside to the top 28 of the desiccant chamber 4 by the arrangement of the air outlet orifice 19 by natural convection. This direction of circulation corresponds to the regeneration phase of the desiccant 5.

Ce principe de circulation d'air dans la chambre 4 de dessiccant 5 lors de la phase de régénération du dessiccant 5 peut encore être amélioré dans un second mode de réalisation tel qu'illustré à la figure 4c.This principle of air circulation in the desiccant chamber 4 during the regeneration phase of the desiccant 5 can be further improved in a second embodiment as shown in Figure 4c.

Les éléments communs au premier mode de réalisation tel qu'illustré aux figures 1, 2 et 4b, et portant les mêmes références numériques ne seront pas décrits de nouveau.The elements common to the first embodiment as illustrated in Figures 1, 2 and 4b, and bearing the same reference numerals will not be described again.

Dans ce second mode de réalisation, le circuit de traitement de l'air de séchage 3 comporte un second moyen de traitement de l'air de séchage disposé sur le plafond 27 de la cuve de lavage 1.In this second embodiment, the drying air treatment circuit 3 comprises a second drying air treatment means disposed on the ceiling 27 of the washing tub 1.

Le circuit de traitement de l'air de séchage 3 comporte une seconde gaine 10 montée à l'extérieur de la cuve de lavage 1 et mise en communication avec l'extérieur du lave-vaisselle.The drying air treatment circuit 3 comprises a second sheath 10 mounted outside the washing tub 1 and placed in communication with the outside of the dishwasher.

Afin d'assurer la circulation de l'air de régénération dans cette seconde gaine 10, un ventilateur 31 est monté dans la gaine 10 en un endroit approprié.In order to ensure the circulation of the regeneration air in this second sheath 10, a fan 31 is mounted in the sheath 10 in a suitable place.

La gaine 10 de circulation d'air de régénération débouche dans un orifice d'introduction d'air 17 ménagé sur la même face externe comportant l'orifice d'introduction d'air 11 de la chambre 4 de dessiccant 5 tel qu'illustré sur la figure 2.The regeneration air circulation duct 10 opens into an air introduction orifice 17 formed on the same external face including the air introduction orifice 11 of the desiccant chamber 4 as illustrated on FIG. Figure 2.

Ici et de manière nullement limitative, cet orifice d'introduction d'air 17 a la forme d'un parallélogramme.Here and in no way limiting, this air introduction orifice 17 has the shape of a parallelogram.

Cet orifice d'introduction d'air 17 a pour fonction de faire entrer de l'air de l'ambiance extérieure.This air introduction orifice 17 has the function of bringing air from the outside atmosphere.

Dans ce mode de réalisation, les clapets 16a et 16b sont adaptés à obturer la communication de l'ouverture d'entrée d'air 11 et de l'ouverture de sortie d'air 14 entre la cuve de lavage 1 et la chambre 4 contenant le dessiccant 5 du circuit de traitement de l'air de séchage 3 tel que décrit dans le mode de réalisation précédent illustré en figure 4b.In this embodiment, the valves 16a and 16b are adapted to close the communication of the air inlet opening 11 and the air outlet opening 14 between the washing tub 1 and the chamber 4 containing the desiccant 5 of the drying air treatment circuit 3 as described in the previous embodiment illustrated in FIG. 4b.

Ainsi, comme bien illustré sur la figure 4c par les flèches montrant le cheminement principal de l'air de régénération au travers de la chambre 4 de dessiccant 5, l'air circule de préférence du haut 28 de la chambre 4 de dessiccant 5 grâce à la disposition de l'orifice d'introduction d'air de l'extérieur 17 vers le bas 29 de la chambre 4 de dessiccant 5 grâce à la disposition de l'orifice de sortie d'air 22 par convection forcée.Thus, as illustrated in FIG. 4c by the arrows showing the main path of the regeneration air through the desiccant chamber 4, the air circulates preferably from the top 28 of the desiccant chamber 4 thanks to the provision of the air introduction port 17 from the outside to the bottom 29 of the desiccant chamber 4 by the provision of the air outlet orifice 22 by forced convection.

Nous allons décrire à présent en référence à la figure 3b, une variante des modes de réalisation précédents.We will now describe with reference to Figure 3b, a variant of the previous embodiments.

Les éléments identiques aux premier et second mode de réalisation, et portant les mêmes références numériques, ne seront pas décrits de nouveau.The elements identical to the first and second embodiments, and bearing the same reference numerals, will not be described again.

Dans ce mode de réalisation, des moyens de chauffage 8 sont agencés à l'entrée 17 de la chambre 4 de dessiccant 5.In this embodiment, heating means 8 are arranged at the inlet 17 of the desiccant chamber 4.

A cet effet, la seconde gaine 10 de circulation d'air provenant de l'extérieur du lave-vaisselle est en contact avec les moyens de chauffage 8 de manière à chauffer l'air circulant sur les nappes de dessiccant 5 lors de la phase de régénération par convection forcée.For this purpose, the second duct 10 for air circulation coming from outside the dishwasher is in contact with the heating means 8 so as to heat the air circulating on the desiccant sheets 5 during the heating phase. regeneration by forced convection.

De préférence, les moyens de chauffage 8 sont disposés dans la partie haute 28 de la chambre 4 de dessiccant 5 comme illustré à la figure 3b.Preferably, the heating means 8 are arranged in the upper part 28 of the desiccant chamber 4 as illustrated in FIG. 3b.

Ces moyens de chauffage 8 servent pendant la phase de régénération des nappes de dessiccant 5 et ont pour fonction de monter en température la chambre 4 de dessiccant 5 pendant la phase de régénération.These heating means 8 are used during the regeneration phase of the desiccant sheets 5 and have the function of increasing the temperature of the desiccant chamber 4 during the regeneration phase.

Nous allons décrire à présent en référence à la figure 3c, une variante des modes de réalisation précédents.We will now describe with reference to Figure 3c, a variant of the modes previous embodiments.

Les éléments identiques au premier mode de réalisation, et portant les mêmes références numériques, ne seront pas décrits de nouveau.The elements identical to the first embodiment, and bearing the same reference numerals, will not be described again.

Dans ce mode de réalisation, les moyens de chauffage 8 sont agencés à l'entrée de l'orifice d'introduction d'air de l'extérieur 18 de la chambre 4 de dessiccant 5.In this embodiment, the heating means 8 are arranged at the inlet of the external air introduction orifice 18 of the desiccant chamber 4.

De préférence, les moyens de chauffage 8 sont disposés dans la partie basse 29 de la chambre 4 de dessiccant 5 comme illustré à la figure 3b.Preferably, the heating means 8 are arranged in the lower part 29 of the desiccant chamber 4 as illustrated in FIG. 3b.

Deux clapets 16a, 16b sont montés dans le circuit de traitement de l'air de séchage 3. Ces clapets 16a, 16b peuvent occuper deux positions dans ce mode de réalisation. Dans une première position du clapet 16a, l'orifice d'introduction d'air 11 est mis en communication avec le circuit de traitement de l'air de séchage 3. Cette première position du clapet 16a correspond à la position ouverte. De même pour le clapet 16b, l'orifice de sortie d'air 14 est mis en communication avec la cuve de lavage 1. Cette première position du clapet 16b correspond à la position ouverte.Two valves 16a, 16b are mounted in the drying air treatment circuit 3. These valves 16a, 16b can occupy two positions in this embodiment. In a first position of the valve 16a, the air introduction orifice 11 is placed in communication with the drying air treatment circuit 3. This first position of the valve 16a corresponds to the open position. Similarly for the valve 16b, the air outlet port 14 is in communication with the washing tub 1. This first position of the valve 16b corresponds to the open position.

Dans la position illustrée en trait plein sur la figure 4b, les clapets 16a, 16b sont adaptés à obturer sensiblement la communication d'air entre la cuve de lavage 1 et la chambre 4 de dessiccant 5.In the position shown in solid lines in FIG. 4b, the valves 16a, 16b are adapted to close substantially the air communication between the washing tub 1 and the desiccant chamber 4.

Ainsi, dans cette seconde position, les clapets 16a, 16b permettent d'isoler la chambre 4 de dessiccant 5 du circuit de traitement de l'air de séchage 3.Thus, in this second position, the valves 16a, 16b make it possible to isolate the desiccant chamber 4 from the drying air treatment circuit 3.

Ainsi, les nappes de dessiccant 5 saturées en humidité de la chambre 4 de dessiccant 5 peuvent être régénérées avant d'être utilisées pour adsorber l'humidité de l'air de la cuve de lavage 1 lors d'un prochain cycle de lavage de la vaisselle.Thus, the moisture saturated desiccant webs of the desiccant chamber 4 can be regenerated before being used to adsorb the moisture of the air from the wash tub 1 during a next wash cycle of the desiccant chamber 4. washing up.

Dans cette position, le ventilateur 9 est arrêté de telle sorte qu'aucun flux d'air ne puisse entrer dans la chambre 4 de dessiccant 5 par l'orifice d'introduction d'air 11.In this position, the fan 9 is stopped so that no air flow can enter the desiccant chamber 4 through the air introduction port 11.

En outre, une entrée d'air ambiant 18 et une sortie d'air 19 vers l'extérieur sont ménagées dans la chambre 4 de dessiccant 5.In addition, an ambient air inlet 18 and an outward air outlet 19 are provided in the desiccant chamber 4.

Ainsi, le dessiccant 5 est régénéré par convection naturelle avec un flux d'air provenant de l'extérieur.Thus, the desiccant 5 is regenerated by natural convection with a flow of air from outside.

Dans une première position, qui correspondrait à une position horizontale des clapets 16a, 16b sur les figures 3a et 4a, la cuve de lavage 1 et la chambre 4 de dessiccant 5 sont mises en communication l'une avec l'autre de telle sorte que les orifices 11 et 14 peuvent être mis en communication avec le circuit de traitement de l'air de séchage 3.In a first position, which corresponds to a horizontal position of the valves 16a, 16b in FIGS. 3a and 4a, the washing tub 1 and the desiccant chamber 4 are placed in communication with one another so that the orifices 11 and 14 may be placed in communication with the drying air treatment circuit 3.

Cette disposition des clapets 16a et 16b permet de faire circuler l'air entre la chambre 4 de dessiccant 5 et la cuve de lavage 1. Les orifices 18 et 19 ne sont pas bouchés pendant la phase de séchage de la vaisselle contenue dans la cuve de lavage 1. Lesdits orifices 18 et 19 servent aussi à la phase de régénération des nappes de dessiccant 5.This arrangement of the valves 16a and 16b makes it possible to circulate the air between the desiccant chamber 4 and the washing tub 1. The orifices 18 and 19 are not clogged during the drying phase of the dishes contained in the vat. 1. The said orifices 18 and 19 are also used for the regeneration phase of the desiccant 5.

Les clapets 16a et 16b peuvent ainsi être placés dans l'une ou l'autre de ces positions lors d'un cycle de séchage de la vaisselle.The valves 16a and 16b can thus be placed in one or the other of these positions during a drying cycle of the dishes.

En particulier, un procédé de séchage et ses différentes phases peuvent être mis en oeuvre après une phase de lavage d'un cycle de lavage de la vaisselle.In particular, a drying method and its different phases can be implemented after a wash phase of a dishwashing cycle.

Ainsi, lors de la mise en oeuvre d'un procédé de séchage, ce procédé de séchage peut comporter tout d'abord une phase de séchage pendant laquelle les clapets 16a et 16b montés dans le circuit de traitement de l'air de séchage 3 sont placés dans leur première position. Ladite première position pour les deux clapets 16a et 16b correspond à une position dans laquelle l'orifice d'introduction d'air 11 débouchant dans la chambre 4 de dessiccant 5 et l'orifice de sortie d'air 14 sont mis en communication avec le circuit de traitement de l'air de séchage 3.Thus, during the implementation of a drying process, this drying method may comprise firstly a drying phase during which the valves 16a and 16b mounted in the drying air treatment circuit 3 are placed in their first position. Said first position for the two valves 16a and 16b corresponds to a position in which the air introduction orifice 11 opening into the desiccant chamber 4 and the air outlet orifice 14 are put in communication with the drying air treatment circuit 3.

Dans cette position, le passage de l'air de séchage sur le dessiccant est favorisé pour l'adsorption de l'humidité contenue dans l'air. Ce type de circulation est particulièrement avantageux lorsque l'air de la cuve de lavage 1 est saturé en vapeur d'eau, tel est le cas après une phase de rinçage de la vaisselle, en fin de cycle de lavage.In this position, the passage of the drying air on the desiccant is favored for the adsorption of the moisture contained in the air. This type of circulation is particularly advantageous when the air of the washing tub 1 is saturated with water vapor, as is the case after a rinsing phase of the dishes, at the end of the washing cycle.

Cette phase du procédé de séchage illustrée à la figure 4a correspond à la phase d'adsorption de la vapeur d'eau de la cuve de la cuve de lavage 1 par les nappes de dessiccant 5.This phase of the drying process illustrated in FIG. 4a corresponds to the adsorption phase of the steam of the tank of the washing tank 1 by the desiccant sheets 5.

Pendant cette phase de séchage, l'air est recyclé par le circuit de traitement de l'air 3 dans sa quasi-totalité. Un orifice d'apport d'air 30 non chargé en humidité est ménagé dans la partie basse d'un des côtés 25 de la cuve de lavage 1 pour améliorer les performances de séchage de la vaisselle. Cet orifice d'apport d'air peut être aussi dans la contre-porte du lave-vaisselle.During this drying phase, the air is recycled by the air treatment circuit 3 in almost all. An unloaded air supply port 30 is provided in the lower portion of one side of the wash tub 1 to improve the drying performance of the dishes. This air intake port can also be in the counter door of the dishwasher.

Cet apport d'air non chargé en humidité est introduit de préférence dans le circuit de traitement de l'air de séchage 3 par effet venturi soit à l'aide d'un second ventilateur 31 monté dans une seconde gaine de ventilation en un endroit approprié tel qu'illustré sur la figure 8.This air intake that is not loaded with moisture is preferably introduced into the drying air treatment circuit 3 by venturi effect or by means of a second fan 31 mounted in a second ventilation duct at a suitable location. as shown in Figure 8.

La proportion de l'air provenant de l'extérieur par rapport au volume d'air humide de l'enceinte de lavage est de l'ordre de 30%.The proportion of air coming from the outside with respect to the humid air volume of the washing chamber is of the order of 30%.

Un orifice de sortie d'air 22 est ménagé dans la chambre 4 de dessiccant 5 pour évacuer une partie de l'air en recirculation dans le circuit de traitement de séchage 3.An air outlet orifice 22 is provided in the desiccant chamber 4 for evacuating part of the recirculating air in the drying treatment circuit 3.

Cet orifice de sortie d'air 22 sera plus largement décrit dans la suite du présent document.This air outlet orifice 22 will be more widely described later in this document.

Dans la phase de régénération, les clapets 16a et 16b sont placés dans une seconde position telle qu'illustrée sur la figure 4b, c'est-à-dire dans une position où la cuve de lavage 1 est isolée du circuit de traitement de l'air de séchage. Dans cette seconde position des clapets 16a et 16b, l'air de régénération traversant la chambre 4 de dessiccant 5 sort préférentiellement vers l'extérieur de la machine à laver et sécher la vaisselle.In the regeneration phase, the valves 16a and 16b are placed in a second position as illustrated in FIG. 4b, that is to say in a position where the washing tank 1 is isolated from the treatment circuit. air drying. In this second position of the valves 16a and 16b, the regeneration air passing through the desiccant chamber 4 preferentially exits the outside of the washing machine and dry the dishes.

Cette phase de régénération nécessite une entrée d'air ambiant 18 et une sortie d'air 19 vers l'extérieur ménagées dans la chambre 4 de dessiccant 5 afin de permettre à l'air de circuler au travers de la chambre 4 de dessiccant 5.This regeneration phase requires an ambient air inlet 18 and an outward air outlet 19 formed in the desiccant chamber 4 to allow air to flow through the desiccant chamber 4.

Cette étape de régénération naturelle du dessiccant 5 consiste en deux étapes.This natural regeneration step of the desiccant 5 consists of two steps.

La première étape de régénération du dessiccant 5, la régénération naturelle, s'effectue entre deux cycles de lavage de la vaisselle.The first regeneration step of the desiccant 5, the natural regeneration, takes place between two washing cycles of the dishes.

La durée nécessaire à la régénération du dessiccant par convection naturelle est de l'ordre de 23 heures. Pendant cette étape, les éléments chauffants 8 ne sont pas en fonctionnement.The time required for the regeneration of the desiccant by natural convection is of the order of 23 hours. During this step, the heating elements 8 are not in operation.

Cette étape ne consomme aucune énergie et permet aux nappes de dessiccant de se régénérer partiellement.This step consumes no energy and allows the desiccant sheets to partially regenerate.

Une seconde étape consiste à mettre en fonctionnement les éléments chauffants 8 pendant la phase de lavage du cycle suivant.A second step is to put into operation the heating elements 8 during the washing phase of the next cycle.

Afin de diminuer la durée de régénération des nappes de dessiccant 5, un second procédé de séchage peut être mis en place pour réaliser une régénération par convection forcée.In order to reduce the regeneration time of the desiccant sheets 5, a second drying process can be set up to perform regeneration by forced convection.

On va décrire à présent ce second procédé de séchage de la vaisselle dans une machine à laver et sécher la vaisselle cuisson conforme à l'invention.This second method of drying the crockery in a washing machine and drying the crockery according to the invention will now be described.

Ce procédé de séchage reprend la première phase de séchage à l'identique.This drying process resumes the first phase of identical drying.

Dans la seconde phase de régénération, les clapets 16a et 16b sont dans ladite seconde position correspondant à la fermeture des orifices d'introduction d'air 11 et de sortie d'air 14 du circuit de traitement de l'air de séchage 3.In the second regeneration phase, the valves 16a and 16b are in said second position corresponding to the closing of the air introduction and air outlet openings 14 of the drying air treatment circuit 3.

Un apport d'air non chargé en humidité est prévu afin de régénérer les nappes dessiccant 5 par un orifice d'introduction d'air 17.An air intake that is not loaded with moisture is provided in order to regenerate the desiccant sheets 5 by an air introduction orifice 17.

Cette disposition des clapets 16a et 16b permet d'isoler la chambre 4 de dessiccant 5 de la cuve de lavage 1 et l'arrivée d'air par l'orifice d'introduction d'air 17 donne la possibilité de régénérer les nappes dessiccant 5 par convection forcée.This arrangement of the valves 16a and 16b makes it possible to isolate the desiccant chamber 4 from the washing tank 1 and the air inlet via the air introduction orifice 17 gives the possibility of regenerating the desiccant sheets 5 by forced convection.

Ainsi, l'air de régénération est introduit dans la chambre 4 de dessiccant 5 par l'orifice d'introduction d'air 17. Cet air provient de l'extérieur afin de ne pas charger les nappes de dessiccant 5 avec de l'humidité. Cet air de l'extérieur est aspiré par le ventilateur 9 et traverse la chambre 4 de dessiccant 5 pour ressortir par un orifice de sortie d'air 22 ménagé dans le fond 13 de la chambre 4 de la dessiccant 5.Thus, the regeneration air is introduced into the desiccant chamber 4 by the air introduction orifice 17. This air comes from the outside so as not to load the desiccant sheets 5 with moisture. . This air from outside is sucked by the fan 9 and passes through the desiccant chamber 4 to exit through an air outlet orifice 22 formed in the bottom 13 of the chamber 4 of the desiccant 5.

Cet orifice de sortie d'air 22 peut aussi être disposé sur une paroi verticale de la chambre 4 de dessiccant 5.This air outlet orifice 22 may also be placed on a vertical wall of the desiccant chamber 4.

Cette deuxième phase de régénération peut être réalisée pendant le cycle de lavage.This second regeneration phase can be performed during the wash cycle.

Lors de la phase de rinçage chaud d'un cycle de lavage de la vaisselle dans un lave-vaisselle ne comprenant pas un dispositif de séchage par dessiccation, une période de chauffe importante et à une température élevée de l'ordre de 65 à 75°C est nécessaire pour obtenir des résultats de séchage satisfaisants.During the hot rinsing phase of a dishwashing cycle in a dishwasher that does not include a drying device by desiccation, a large heating period and at a high temperature of the order of 65 to 75 ° This is necessary to obtain satisfactory drying results.

Ce niveau de température est nécessaire pour assurer que l'eau s'évapore suffisamment pendant la période de séchage car l'air qui est recirculé dans l'enceinte de lavage 1 est constamment chargé en humidité.This level of temperature is necessary to ensure that the water evaporates sufficiently during the drying period because the air which is recirculated in the washing chamber 1 is constantly loaded with moisture.

Avec un dispositif de séchage comprenant une chambre 4 de dessiccant 5 tel que décrite précédemment, la température de chauffe de la structure de la machine, de la vaisselle et du bain est plus faible.With a drying device comprising a desiccant chamber 4 as described above, the heating temperature of the structure of the machine, the dishes and the bath is lower.

L'air recirculé dans l'enceinte de lavage 1 est asséché par le dessiccant 5 lors de la circulation dudit air par la chambre 4 de dessiccant 5 et permet de sécher la vaisselle plus efficacement à une température plus faible.The recirculated air in the washing chamber 1 is dried by the desiccant 5 during the circulation of said air through the desiccant chamber 4 and allows the dishes to dry more efficiently at a lower temperature.

On peut constater que le fonctionnement du dispositif de séchage par dessiccation peut être utilisé jusqu'à une température de 15°C sans détériorer les performances de séchage.It can be seen that the operation of the drying device by desiccation can be used up to a temperature of 15 ° C without deteriorating the drying performance.

Toutefois, l'utilisation de liquides de rinçage connus actuellement ne permet pas de diminuer la température de chauffe dans la cuve de lavage 1 au-delà de 45°C tout en conservant des résultats de séchage identiques. En effet, cette température de chauffage de la cuve de lavage, de la vaisselle et du bain est nécessaire pour assurer que le liquide de rinçage ne mousse pas dans l'eau contenue dans le bain.However, the use of currently known rinsing liquids does not make it possible to reduce the heating temperature in the washing tank 1 above 45 ° C while maintaining identical drying results. Indeed, this heating temperature of the washing tub, the dishes and the bath is necessary to ensure that the rinsing liquid does not foam in the water contained in the bath.

Les moyens de chauffage mis en fonctionnement pendant la phase de rinçage chaud sont indépendants des éléments chauffants 8 placés dans la chambre 4 de dessiccant 5.The heating means operated during the hot rinsing phase are independent of the heating elements 8 placed in the desiccant chamber 4.

Pendant la phase de séchage, les éléments chauffants 8 ne sont pas mis en fonctionnement. Les nappes de dessiccants 5 adsorbent l'humidité sans nécessiter un apport de chaleur par les éléments chauffants 8. De même, les moyens de chauffage de la vaisselle contenue dans la cuve de lavage 1 ne sont pas mis en fonctionnement. L'apport de chaleur transmis par l'eau de rinçage chaud est emmagasiné par la vaisselle et suffit à l'évaporation de ladite eau de rinçage pendant la phase de séchage.During the drying phase, the heating elements 8 are not put into operation. The desiccant webs adsorb moisture without requiring heat input from the heating elements 8. Also, the dish heating means contained in the washing tub 1 are not operated. The supply of heat transmitted by the hot rinsing water is stored by the dishes and is sufficient for the evaporation of said rinsing water during the drying phase.

La phase de régénération par convection forcée s'effectue pendant la phase de lavage du cycle suivant.The forced convection regeneration phase is carried out during the washing phase of the next cycle.

Ainsi, le chauffage du dessiccant 5 dans la chambre 4 se fait en même temps que le chauffage de la vaisselle dans la cuve de lavage 1.Thus, the heating of the desiccant 5 in the chamber 4 is done at the same time as the heating of the dishes in the washing tub 1.

De telle sorte que les déperditions de chaleur pendant le chauffage de la vaisselle dans la cuve de lavage 1 peuvent être utilisées pour chauffer et régénérer le dessiccant 5 dans la chambre 4.In such a way that the heat loss during the heating of the dishes in the washing tub 1 can be used to heat and regenerate the desiccant 5 in the chamber 4.

Ainsi, la durée et la température de séchage peuvent être réduites, de telle sorte que la consommation énergétique en électricité est diminuée. Le gain énergétique mesuré lors d'essais de validation de l'invention est de 170Wh sur un cycle de lavage et de séchage.Thus, the duration and the drying temperature can be reduced, so that the energy consumption in electricity is decreased. The energy gain measured during validation tests of the invention is 170Wh on a washing and drying cycle.

Bien entendu, de nombreuses modifications peuvent être apportées aux exemples de réalisation décrits ci-dessus sans sortir du cadre de l'invention.Of course, many modifications can be made to the embodiments described above without departing from the scope of the invention.

Ces différents moyens de traitement de l'air de séchage dans la gaine 10 de circulation d'air, constitués d'une chambre 4 contenant le dessiccant 5, d'un ventilateur 9 et de moyens de chauffage 8, sont seulement indiqués à titre non limitatif dans ce mode de réalisation.These various means for treating the drying air in the air circulation duct 10, consisting of a chamber 4 containing the desiccant 5, a fan 9 and heating means 8, are only indicated as non-existent. in this embodiment.

Notamment, le positionnement des moyens de chauffage 8 peut être différent des modes de réalisation décrits.In particular, the positioning of the heating means 8 may be different from the embodiments described.

Claims (10)

Procédé de séchage de la vaisselle mis en oeuvre dans une machine à laver et sécher la vaisselle comprenant un boîtier (22) renfermant une enceinte de lavage (1) connecté à un circuit ouvert de traitement de l'air (3) chargé en humidité et comportant au moins un ventilateur (9) destiné à faire circuler ledit air entre une ouverture de captage (23) et une ouverture d'évacuation (14), ledit circuit comportant une ouverture d'entrée d'air (30) au travers du boîtier (22), un moyen d'assèchement de l'air à traiter comprenant une chambre (4), caractérisé en ce qu'il comprend les étapes suivantes : - chauffage par des moyens de chauffage de la structure, du bain et de la vaisselle ; - arrêt desdits moyens de chauffage ; - ventilation de l'enceinte de lavage (1) par le ventilateur (9) lors de la phase de séchage permettant à l'air de circuit de traitement de l'air (3) et de traverser la chambre (4) d'adsorption ; et - la phase de séchage est suivie d'une phase de régénération du dessiccant (5) par un système de ventilation par convection naturelle dans la chambre (4) de dessiccant (5) avec un flux d'air provenant de l'extérieur. A method of drying dishes used in a washing machine and drying dishes comprising a housing (22) enclosing a washing chamber (1) connected to an open air treatment circuit (3) charged with moisture and having at least one fan (9) for circulating said air between a sensing opening (23) and an exhaust opening (14), said circuit having an air inlet opening (30) through the housing (22), a dewatering means for the air to be treated comprising a chamber (4), characterized in that it comprises the following steps: heating by heating means of the structure, the bath and the dishes; stopping said heating means; - ventilation of the washing chamber (1) by the fan (9) during the drying phase allowing the air of the air treatment circuit (3) and to pass through the adsorption chamber (4) ; and - The drying phase is followed by a desiccant regeneration phase (5) by a natural convection ventilation system in the chamber (4) of desiccant (5) with a flow of air from outside. Procédé de séchage de la vaisselle mis en oeuvre dans une machine à laver et sécher la vaisselle selon la revendication 1, caractérisé en ce que le moyen d'assèchement de l'air comprend un dessiccant (5) et un moyen de régénération (8) dudit dessiccant (5).Method for drying dishes used in a washing machine and drying dishes according to claim 1, characterized in that the means for drying air comprises a desiccant (5) and a regeneration means (8) said desiccant (5). Procédé de séchage de la vaisselle mis en oeuvre dans une machine à laver et sécher la vaisselle selon la revendication 1, caractérisé en ce que une quantité d'air provenant de l'extérieur est captée par l'ouverture d'entrée d'air (30) pendant la phase de séchage et mélangée à l'air en recirculation dans le circuit de traitement de l'air.Method for drying dishes used in a washing machine and drying dishes according to claim 1, characterized in that a quantity of air coming from the outside is sensed by the air inlet opening ( 30) during the drying phase and mixed with recirculating air in the air treatment circuit. Procédé de séchage de la vaisselle mis en oeuvre dans une machine à laver et sécher la vaisselle selon la revendication 3, caractérisé en ce que la proportion de l'air provenant de l'extérieur par rapport au volume d'air humide de l'enceinte de lavage est de l'ordre de 30%.Method of drying dishes used in a washing machine and drying dishes according to claim 3, characterized in that the proportion of air coming from the outside relative to the humid air volume of the enclosure washing is of the order of 30%. Procédé de séchage de la vaisselle mis en oeuvre dans une machine à laver et sécher la vaisselle selon la revendication 1, caractérisé en ce que la température de chauffe de la structure, du bain et de la vaisselle est comprise dans une plage s'étalant de 15 à 75°C.Method of drying dishes used in a washing machine and drying dishes according to claim 1, characterized in that the heating temperature of the structure, the bath and the dishes is included in a range ranging from 15 to 75 ° C. Procédé de séchage de la vaisselle mis en oeuvre dans une machine à laver et sécher la vaisselle selon la revendication 5, caractérisé en ce que la température de chauffe de la structure, du bain et de la vaisselle est de l'ordre de 45°C.A method of drying dishes used in a washing machine and drying dishes according to claim 5, characterized in that the heating temperature of the structure, the bath and the dishes is of the order of 45 ° C . Procédé de séchage de la vaisselle mis en oeuvre dans une machine à laver et sécher la vaisselle selon la revendication 1, caractérisé en ce que une phase de régénération du dessiccant (5) par un système de ventilation par convection forcée est réalisée dans la chambre (4) de dessiccant (5).Method of drying dishes used in a washing machine and drying dishes according to claim 1, characterized in that a regeneration phase of the desiccant (5) by a forced convection ventilation system is carried out in the chamber ( 4) desiccant (5). Procédé de séchage de la vaisselle mis en oeuvre dans une machine à laver et sécher la vaisselle selon la revendication 7, caractérisé en ce que la phase de régénération du dessiccant (5) par un système de ventilation par convection forcée est réalisée dans la chambre (4) de dessiccant (5) pendant la phase de lavage du cycle suivant.A method of drying dishes used in a washing machine and drying dishes according to claim 7, characterized in that the regeneration phase of the desiccant (5) by a forced convection ventilation system is carried out in the chamber ( 4) desiccant (5) during the washing phase of the next cycle. Procédé de séchage de la vaisselle mis en oeuvre dans une machine à laver et sécher la vaisselle selon la revendication 1, caractérisé en ce que le moyen de régénération (8) du dessiccant (5) est au moins une résistance électrique chauffante.A method of drying dishes used in a washing machine and drying dishes according to claim 1, characterized in that the regeneration means (8) of the desiccant (5) is at least one heating electric resistance. Procédé de séchage de la vaisselle mis en oeuvre dans une machine à laver et sécher la vaisselle selon la revendication 9, caractérisé en ce que ladite résistance électrique (8) est comprise en sandwich (32) entre deux nappes de dessiccant (5).A method of drying dishes used in a washing machine and drying dishes according to claim 9, characterized in that said electrical resistance (8) is sandwiched (32) between two sheets of desiccant (5).
EP05112279A 2004-12-21 2005-12-16 Drying process of a dishwasher Active EP1674029B1 (en)

Applications Claiming Priority (1)

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FR0413689A FR2879430B1 (en) 2004-12-21 2004-12-21 METHOD FOR IMPLEMENTING DRYING OF DISHWASHERS IN DISHWASHERS

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EP1674029B1 EP1674029B1 (en) 2008-02-13

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FR (1) FR2879430B1 (en)

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WO2011039262A1 (en) 2009-10-01 2011-04-07 Arcelik Anonim Sirketi A dishwasher with increased drying effectiveness
CN102905604A (en) * 2010-05-24 2013-01-30 伊莱克斯家用产品公司 Absorption drying device for a dishwasher and associated method
EP2399503A3 (en) * 2010-06-23 2015-01-21 Samsung Electronics Co., Ltd. Household appliance having drying duct
US8961705B2 (en) 2008-07-28 2015-02-24 Bsh Bosch Und Siemens Hausgeraete Gmbh Dishwasher machine comprising a sorption drying system
EP2292132A3 (en) * 2009-09-02 2017-01-11 BSH Hausgeräte GmbH Dishwasher and controlling method thereof
CN108968876A (en) * 2018-07-16 2018-12-11 珠海格力电器股份有限公司 Dish-washing machine
US10188263B2 (en) 2008-08-27 2019-01-29 BSH Hausgeräte GmbH Dishwasher comprising a sorption drying device
US10188262B2 (en) 2008-08-27 2019-01-29 BSH Hausgeräte GmbH Dishwasher comprising a sorption drying machine
US10188264B2 (en) 2008-08-27 2019-01-29 BSH Hausgeräte GmbH Dishwasher comprising a sorption drying device

Families Citing this family (4)

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EP2389854B1 (en) 2010-05-24 2016-08-24 Electrolux Home Products Corporation N.V. Device and method for a dishwasher
DE102011000167A1 (en) * 2011-01-17 2012-07-19 Miele & Cie. Kg Domestic appliance, particularly dishwasher, clothes dryer or washer dryer, has treatment chamber and sorbent that removes moisture of air as sorptive
DE102011077642A1 (en) 2011-06-16 2012-12-20 BSH Bosch und Siemens Hausgeräte GmbH Dishwasher, particularly household dishwasher, has rinsing container for receiving tableware, and sorption drying device is arranged at vertically extending rear wall of rinsing container, where container is provided with channels
DE102013103647A1 (en) * 2013-04-11 2014-10-16 Miele & Cie. Kg Automatic dishwasher and method for operating a washing machine

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EP0970654A1 (en) * 1998-07-10 2000-01-12 Ecolab Inc. Diswasher and method for removing vapor from the dishwasher housing
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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8961705B2 (en) 2008-07-28 2015-02-24 Bsh Bosch Und Siemens Hausgeraete Gmbh Dishwasher machine comprising a sorption drying system
US10188263B2 (en) 2008-08-27 2019-01-29 BSH Hausgeräte GmbH Dishwasher comprising a sorption drying device
US10188264B2 (en) 2008-08-27 2019-01-29 BSH Hausgeräte GmbH Dishwasher comprising a sorption drying device
US10188262B2 (en) 2008-08-27 2019-01-29 BSH Hausgeräte GmbH Dishwasher comprising a sorption drying machine
EP2292132A3 (en) * 2009-09-02 2017-01-11 BSH Hausgeräte GmbH Dishwasher and controlling method thereof
WO2011039262A1 (en) 2009-10-01 2011-04-07 Arcelik Anonim Sirketi A dishwasher with increased drying effectiveness
CN102905604A (en) * 2010-05-24 2013-01-30 伊莱克斯家用产品公司 Absorption drying device for a dishwasher and associated method
CN102905604B (en) * 2010-05-24 2016-05-18 伊莱克斯家用产品公司 For absorption dehydration equipment and the correlation technique of dishwasher
EP2399503A3 (en) * 2010-06-23 2015-01-21 Samsung Electronics Co., Ltd. Household appliance having drying duct
US9480388B2 (en) 2010-06-23 2016-11-01 Samsung Electronics Co., Ltd. Household appliance having drying duct
EP2248456A3 (en) * 2010-08-24 2011-04-06 V-Zug AG Household appliance, in particular dishwasher
CN108968876A (en) * 2018-07-16 2018-12-11 珠海格力电器股份有限公司 Dish-washing machine
CN108968876B (en) * 2018-07-16 2024-04-12 珠海格力电器股份有限公司 Dish-washing machine

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FR2879430A1 (en) 2006-06-23
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ATE385731T1 (en) 2008-03-15
EP1674029B1 (en) 2008-02-13
DE602005004740D1 (en) 2008-03-27
FR2879430B1 (en) 2008-12-05

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