EP1723892B1 - Dishwasher with sprinkling means - Google Patents

Description

The present invention relates to a dishwashing machine.

It also relates to a washing process used in such a dishwashing machine.

The present invention relates generally to the field of dishwashing machines for domestic use, and in particular a dishwashing machine comprising at least one dishware basket on which is disposed a facade for channeling the flow of the dishwashing machine. washing water between at least one dish rack facade and the counter door. This flow of wash water is intended to clean the storm door.

The storm door provides a surface to recover all the dirt when loading the dishes into at least one basket of dishes. Therefore, the storm door must be cleaned at each wash cycle.

In order to carry out the cleaning of the counter door of the door of a dishwashing machine, there is a conventional cleaning device.

This cleaning device consists of using the washing water spraying means arranged in the tank. Generally, said washing water spraying means consist of reels and nozzles.

In a conventional dishwasher, a first reel is mounted on the bottom wall of the vessel, a second is connected to a crockery basket, and a nozzle is attached to the top wall of the vessel.

This type of solution, however, has the drawbacks related to the direction of wash water jets generated by the spray means. The spray means disposed in the tank must clean the dishes and the walls of the tank. The crockery baskets comprise more and more plastic parts increasing the sections of the crockery areas of the crockery relative to the crockery wire of metal crockery. Therefore, the shadows generated by said plastic parts are larger and make cleaning the walls of the tank more difficult. This observation can be seen more easily with baskets of dishes including facades.

In addition, the wash water jets must be tangential to the storm door to minimize the impact sound of said wash water jets on the surface of the storm door.

There is also a dishwasher described in the document US 2,655,024 A . This document describes a dishwashing machine comprising a water supply device therein. Said water supply device comprising a water inlet tube extending in a position above the upper wall of the tank. An opening of the tube passes through the upper wall of tank. A siphon receiving water from the tube is supported by the inner surface of the door. The inlet of the siphon is in spaced relationship with the outlet opening of the tube but in flow relationship when the door is closed. The outlet opening of the siphon discharges the water inside the tank. The intermediate portion of the siphon is made to provide a water trap to prevent the passage of detergent or dirty washing liquid near the tube.

However, the dishwashing machine described in the document US 2,655,024 A has the disadvantage of filling a siphon to pour water from said siphon without benefiting from a particular pressure. Therefore, the water discharged on the storm door does not remove the soils of said storm door.

In addition, the dishwashing machine described in the document US 2,655,024 A has the disadvantage that the dish baskets are made of son allowing the water to spread inside the tank. Therefore, the soils of the storm door are not channeled between the door and the baskets. Said stains may be projected on the dishes and require a particular action of the water spraying means to remove them from the dishes.

The present invention aims to solve the aforementioned drawbacks and to provide a dishwashing machine facilitating the cleaning of the storm door for a tank comprising at least one dish rack having at least one facade.

For this purpose, the present invention aims, in a first aspect, a washing machine and drying dishes comprising a tank connected to a hydraulic circuit, whose front face is closed by a door, and said vessel being surrounded by a housing comprising an upper wall, side walls, a bottom wall and a bottom wall, said tank being equipped with dish racks comprising at least one face facing the front face of said tank, and at least one washing water spraying means on the dishes arranged in the washing tub, said door comprising an outer facade and a counter-door, and said watering means spray washing water directly on the storm door.

According to the invention, watering means are provided on the upper wall of the washing tub for spraying washing water in an area between the storm door and the baskage facades.

Thanks to these means of watering and this arrangement of said watering means, on the upper wall of the washing tub, the flow of the washing water in the zone between at least one front dish rack and the counter-door allows the cleaning of the latter.

Optimally, these watering means can occupy a free space of the dishwashing machine, generally existing between the door of the washing machine. dishes and the front edge of the dishes basket of the dishwashing machine.

These watering means are thus housed in the upper wall of the tank so that the surfaces of the counter-door and at least one dish rack facade are accessible to the spray jets washing water to inside the dishwasher.

In addition, thanks to this arrangement of watering means and the arrangement of the facades on the crockery baskets, the sprinkling of the storm door can be carried out alternately with the washing of the dishes and without projections on the dishes contained in the baskets.

The watering means, for spraying washing water in an area between the storm door and the baskage facades, make it possible to clean the said door and said baskage facades with a jet of washing water under pressure. The strength of the wash water jet is sufficient to remove dirt deposited on the storm door and baskets facades without causing an unsatisfactory sound to the user.

The spray wash water in the area between the storm door and the baskage facades forms a jet of wash water extending across the width of the washing machine door and dries the dishes. This washing water jet also makes it possible to clean the storm door and the facades of baskets over the entire height of the door of said machine.

Said washing water jet is diffused between the storm door and the baskage facades by bouncing on the walls of said counter door and said baskage facades. Thus, the impacts of the washing water jet make it possible to take off the dirt anchored on said walls of the storm door and baskage facades.

The watering means spray washing water directly on the storm door.

The direct flow of washing water on the storm door distributes and dilutes a detergent contained in a detergent box disposed in the storm door.

According to another preferred feature of the invention, the tank is divided into at least two washing zones one above the other separated by at least one separation wall and said washing zones communicating with each other. 'other.

In a dishwashing machine comprising at least two washing zones, the washing cycle can be applied to a single washing zone, but in all cases the total surface of the storm door must be clean at the end of the cycle. washing.

According to another preferred feature of the invention, a hydraulic distributor is arranged in the hydraulic circuit for supplying the sprinkler means of the storm door.

This hydraulic distributor allows to supply the watering means at the appropriate time. In particular, the watering can be done alternately with the sprinkling of the dishes. Therefore, the available power of the hydraulic circuit pump is not reduced.

The present invention also relates, in a second aspect, to a washing method in a dishwashing machine as described above, comprising a tank connected to a hydraulic circuit, whose front face is closed by a door, and surrounded by a housing comprising an upper wall, side walls, a bottom wall and a bottom wall, said vessel is equipped with dish racks comprising at least one facade vis-à-vis the front face of the tank, as well as less a means for spraying washing water on the dishes arranged in the washing tub, said door comprises an outer facade and a counter-door, and the washing water is sprayed directly onto the storm door by means of watering.

This washing process comprises at least one step of spraying washing water in an area between the storm door and the baskage facades.

Thus, the cleaning of the door against is effective even in the presence of facades of baskets preventing the sprinkling of the door against the spraying means of the dishes.

Other features and advantages of the invention will become apparent in the description.

• la figure 1 est une vue en perspective de l'intérieur d'une machine à laver la vaisselle avec la porte dans une position ouverte conforme à l'invention ;
• la figure 2 est une vue en coupe et en élévation d'une machine à laver la vaisselle conforme à l'invention ;
• la figure 3 est une vue de face d'une paroi de séparation conforme à l'invention ;
• la figure 4 est une vue en perspective d'une paroi de séparation conforme à l'invention ; et
• la figure 5 est une vue en coupe d'une machine à laver la vaisselle conforme à un mode de réalisation d'un procédé de lavage de la contre-porte.

In the accompanying drawings, given as non-limiting examples:

• the figure 1 is a perspective view of the interior of a dishwashing machine with the door in an open position according to the invention;
• the figure 2 is a sectional and elevational view of a dishwashing machine according to the invention;
• the figure 3 is a front view of a partition wall according to the invention;
• the figure 4 is a perspective view of a partition wall according to the invention; and
• the figure 5 is a sectional view of a dishwashing machine according to an embodiment of a method of washing the door against.

We will first describe, with reference to figures 1 and 2 , a dishwashing machine according to the invention.

A dishwashing machine 1 comprising a tank 2 whose front face 3 is closed by a door 4, and surrounded by a housing 5 (shown partially) designated upper basket 14a and the basket 14 of the lower part of the tank 2 by lower basket 14b. The dish baskets 14a and 14b can be pushed and removed from the washing areas 10 and 11 by sliding them inside the bowl 2 of the dishwashing machine 1 at the end of a wash cycle for unloading the dishes at the beginning of the washing cycle for loading the dishes.

This dishwashing machine 1 comprises at least two washing zones 10 and 11 and is provided with a common pump for the circulation of the washing water in one or the other washing zone 10 and 11 or in all washing areas simultaneously.

The dishwashing machine 1 selectively or concurrently activates one or more washing zones 10 and 11 if the dirty dishes are loaded into a washing zone 10 and 11 or more.

Said pump 20 also allows the tank 2 to be emptied.

Control means make it possible to unroll independent or sequential predetermined washing programs for each of said washing zones.

This dishwashing machine 1 also comprises a door 4 formed in particular of two parts. The first part of the door 4 corresponds to the external facade 22 visible to the customer. The facade may also be a panel adapted to receive a piece of furniture of the kitchen. The second part of the door 4 is the counter door 23.

The baskets 14a and 14b include facades 24 placed on the front walls of said baskets 14a and 14b vis-à-vis the counter door 23 of the door 4.

As well illustrated on the figure 2 a first washing water spraying means 13a and a second washing water spraying means 13b are arranged in said first washing zone 10 and said second washing zone 11 for spraying the dirty dishes loaded in the washing baskets. dishes 14a and 14b.

In a preferred embodiment, the dishwashing machine 1 comprises a first spraying means 13a associated with the first washing zone 10 comprising a rotatable spray arm 26 disposed in the lower portion of the first washing zone 10 for spraying. washing water on the dishes in a bottom-up direction and a spray nozzle 27 assembled on the upper wall 28 of the tank 2 of the first washing zone 10 to spray wash water on the dishes in a direction from top to bottom.

Similarly, a second spraying means 13b associated with the second washing zone 11 has a rotatable spray arm 32 disposed in the lower portion of the second washing zone 11 for spraying the wash water on the dishes in a direction from bottom to top and a spray nozzle 33 connected to the partition wall 12.

With this arrangement of the first and second washing water spraying means 13a and 13b, the washing of the crockery can be carried out independently in one of said washing zones 10 and 11 or simultaneously with all the washing zones 10 and 11.

In the exemplary embodiment, the dishwashing machine operates in such a way as to minimize the volume of washing water in a bowl 34 formed in the bottom wall 31 of the tank 2 from the first and second spraying means 13a and 13b.

The pump draws the wash water in the bowl 34 to circulate said pressurized wash water to the spray means 13. Then, the wash water returns to the bowl 34.

The pump 20 is driven by an electric motor.

This pump 20 operates during the water filling of said bowl 34 so as to control a water introduction valve according to the value of the pressure produced by said pump.

The state, open or closed, of the solenoid valve depends on the quantity of water obtained in the tank 2.

The dishwashing machine 1 also includes a multi-position valve for directing the pressurized wash water from the pump 20 to the various parts of the hydraulic circuit 35 depending on the wash cycle.

A main advantage of this dishwashing machine 1 is the flexibility of use from a tank 2 separated into at least two wash zones 10 and 11 independent and connected together. This device allows the user to choose to load one or more washing areas depending on the dishes to be washed and also to select a longer or shorter program and more or less intensive.

The construction of such a dishwasher 1 is compatible from the structure of a conventional dishwasher.

The invention is described below with reference to a partition wall 12 of the tank 2 for a dishwasher 1, said partition wall 12 comprises a concavity facing down 15. But, it is understood that this partition wall 12 may have a plurality of such downwardly facing concavities 15, as illustrated in FIGS. figures 3 and 4 .

Preferably, the downward concavity 15 is in the form of a cylinder portion.

In addition, the positioning of the concavity turned down 15 corresponds to the location of plates 16 arranged in a basket of dishes 14 below the partition wall 12.

The shape given to the partition wall 12 is intended to adapt to the dishes loaded in the lower basket 14b. Said dishes loaded in the lower basket 14b can be plates 16 or dishes. A cylindrical type of shape reduces the bulk of the partition wall 12 to a minimum. The shape of the partition wall 12 is made in the loading direction of the plates 16 in the lower basket 14b.

In this first embodiment, the partition wall 12 comprises two downward facing concavities 15 connected to each other so as to form two plate loading locations 16, as illustrated in FIG. figure 3 .

Here, and without limitation, the two downwardly facing concavities 15 are substantially identical in shape and adapted to be held edge to edge so as to form the partition wall 12.

These two concavities turned down 15 are made in a single piece forming a rigid piece to be put in place in the tank 2 of the dishwasher 1.

Here, and in a nonlimiting manner, each concavity 15 has a horizontal axis 17 coaxial with an axis 18 passing through the center of the plates.

The connecting surfaces 19 of the partition wall 12 form a slope inclined towards the rear and the bottom of the washing tank 2 so as to drain the washing water to a bottom wall 30 of the tank 2.

In general, the partition wall 12 is inclined at an angle greater than 1 ° towards the rear and the bottom of the washing tank 2.

The angle of inclination of the connecting surfaces 19 is such that the washing water sprayed in a washing zone 10 situated above the partition wall 12 flows rapidly towards the bottom wall 30 of the tank 2 .

Preferably, the partition wall is inclined at an angle of the order of 2.5 °.

Here, the number of connecting surfaces 19 is three in number. A first connecting surface 19 is located between the two concavities 15. The other two connecting surfaces 19 are located between a concavity 15 and the outer edge of the partition wall 12.

A first washing zone communicates with a second washing zone by at least one washing water flow zone 36 through the separation wall 12.

In the embodiment described, the partition wall 12 comprises three washing water flow zones 36 from a first zone 10 to a second washing zone 11.

Each downward concavity 15 is connected to a lateral surface 19 coming into contact with a side wall 29 of the tank 2.

In addition, in an embodiment according to the invention, the partition wall 12 is connected to the side walls 29 possibly sealingly.

Preferably, the partition wall 12 comprises at least one water supply channel 37 of a detergent box 38.

Here, the partition wall 12 comprises two water supply channels 37 of a detergent box 38 each corresponding to a washing zone 10 and 11 of the tank 2.

Of course, the partition wall 12 may comprise means 13 for spraying washing water.

Typically, the partition wall occupies a footprint of the order of 3mm thick.

In an embodiment according to the invention, the partition wall 12 is integral with a basket of dishes 14.

Here and in no way limiting, this partition wall 12 is fixed to the upper basket 14a.

Preferably, this partition wall 12 is removable in order to be able to transform the dishwasher 1 from a conventional configuration of the tank 2 to a tank 2 separated into two washing zones 10 and 11.

We will now describe, with reference to the figure 1 , a washing method in a dishwashing machine according to the invention.

The invention consists in allowing at least two washing zones 10 and 11 of the tank 2 of a dishwashing machine 1 to function independently. The use of a dishwashing machine 1 comprising at least two washing zones 10 and 11 makes it possible to carry out a washing cycle in only one of said washing zones 10 and 11, ie to carry out a washing cycle identical to at least two washing zones 10 and 11, such as in a conventional dishwasher, or performing a different wash cycle in at least two washing zones 10 and 11.

For example, an "intensive" washing cycle can be carried out in the washing zone 11 and a so-called "fragile" washing cycle can be carried out in the washing zone 10.

According to an embodiment according to the invention, the washing device according to the figure 2 , consists of the following elements. First, the tank 2 of the dishwashing machine 1 whose front face 3 is closed by a door 4, and surrounded by a housing 5 comprising an upper wall 6, side walls 7, a bottom wall 8 and a bottom wall 9, said tank 2 is divided into at least two washing zones 10 and 11 one above the other separated by at least one partition wall 12 and said washing zones 10 and 11 communicating with each other, as well as at least one washing water spraying means 13 on the dishes in each washing zone 10 and 11, a bowl 34 formed in the wall bottom 31 of the tank 2 to receive the spray wash water in said washing zones 10 and 11, a single wash water pump communicating with the bowl 34.

Then, the washing device comprises a control means (not shown) controlling each spraying means 13 according to the washing steps of a selected program. The role of this control means is to allow the unfolding of a washing cycle independently for each washing zone 10 and 11. Each of said washing zones 10 and 11 having its own spraying means 13.

The washing device comprises for each washing zone a part of the hydraulic circuit 35 corresponding to one of the spraying means 13.

Said part of the hydraulic circuit 35 is supplied with washing water by a supply means and a pipe separating the hydraulic circuits of each washing zone 10 and 11 at the outlet of said supply means.

The feeding means is a hydraulic distributor. The hydraulic distributor includes a multi - position rotary disc valve.

According to one particular embodiment of the invention, a temporary reservoir can be provided between the spraying means 13 and the bowl 34.

According to the process of the invention used, for example, during the washing step, the process starts with a first phase initiating the start of a phase of a wash cycle in at least two washing zones. and 11 of the tank 2.

This departure can be the launch of a start of a program selected by the user or the start of a phase of a wash cycle.

Then, at least one common period of said at least two wash zones 10 and 11 is unwound.

After, a washing phase in at least a first washing zone 10 is stopped. A partial quantity of washing water contained in the tank 2 can be drained via a pump 20 so as to use only the strictly necessary amount of washing water in the hydraulic circuit 35 for the operation of the water. at least one active zone 10 or 11.

In parallel with this stop, a washing phase in at least a second washing zone 11 continues. Said first washing zone 10 waits for the end of the washing phase of said second washing zone 11.

Then, the next washing phase common to at least two washing zones 10 and 11 is synchronized.

Each spraying means 13 is independently controlled to unwind a washing cycle decomposed into phases.

This washing method makes it possible to differentiate the duration, the temperature of each washing phase unwound in each of the washing zones 10 and 11. The stopping of a washing cycle in a washing zone 10 or 11 can be linked to a lower operating temperature or at a lower time. Continuing the washing cycle in an active washing zone 10 or 11 may optionally allow the washing water to be heated through said washing zone 10 or 11.

The wash water temperature increases in at least one active wash zone 10 or 11.

In addition to variations in washing water sprinkling times and temperatures, the method can allow variations of the pressures of the wash water in each active washing zone 10 and 11 by changing the speed of rotation of the pump. supplying the spraying means 13 of each washing zone 10 and 11.

The wash water spray pressure increases in at least one active wash zone 10 or 11.

According to this method, a significant reduction in water consumption is obtained by reducing the quantities of water per phase of the washing cycle and by reducing the number of phases. This reduction in the number of phases also leads to the elimination of phases of filling, emptying and heating of the wash water, which are very time consuming and energy consuming.

The amount of wash water is adjusted to the amount of wash water required for operation of at least one active zone 10 or 11.

According to a preferred embodiment, the drying step is carried out simultaneously for all said washing zones 10 and 11 of the tank 2.

We will now describe, with reference to the figure 5 , a device for cleaning the counter door 23 in a dishwashing machine 1.

A particular embodiment of the cleaning device of the counter door 23 of a dishwashing machine 1 according to the invention essentially comprises a tank 2 connected to a hydraulic circuit 35, the front face 3 of which is closed by a door 4, and said vessel 2 being surrounded by a housing 5 comprising an upper wall 6, side walls 7, a bottom wall 8 and a bottom wall 9, said vessel 2 being equipped with dish baskets 14 comprising at least one facade 24 vis-à-vis the front face 3 of said vessel 2, and at least one spray means 13 washing water on the dishes disposed in the washing tub 2, said door 4 comprising an outer facade 22 and a counter door 23.

The invention consists in cleaning the counter door 23 of a door 4 of tank 2 during the washing cycle of a dishwashing machine 1 of the stains from the dishes and baskets 14 during the loading of the dishes. Indeed, dirt falls on the surface constituting the counter door 23 at each output of a basket 14 for loading the dishes. At the time of this operation, the counter door 23 has the function of extending the bottom wall 31 of the tank 2.

According to a particular embodiment, the cleaning device comprises sprinkling means 39 formed on the upper wall 28 of the washing tank 2 for spraying wash water in a zone 40 between the counter door 23 and the facades 24 of baskets 14.

The sprinkling means 39 can spray washing water directly on the counter door 23. This direction of the flow of the wash water has the advantage of distributing and diluting a detergent product contained in a box. detergent products 38 that can be disposed in the counter door 23.

The device comprises a hydraulic distributor positioned at the outlet of the pump 20 and upstream of the supply circuit of the spraying means 13 and the watering means 39, which prevents the water from entering the supply channel of the pumps. watering means 39 when it is not desired to operate said watering means 39 during washing or rinsing.

The hydraulic circuit 35 for supplying the spraying means 13 and the spraying means 39 comprises, in particular, a feed and circulation pump 20 as well as a filtration system.

The role of the feed and circulation pump 20 is to draw water from the tank 2 and supply the various parts of the hydraulic circuit 35.

According to a particular embodiment, the tank 2 is divided into at least two washing zones 10 and 11 one above the other separated by at least one separation wall 12 and said washing zones 10 and 11 communicating with each other. with each other.

Thus, one of said washing zones 10 or 11 may contain so-called "clean" dishes while another washing zone 10 or 11 may contain so-called "dirty" dishes. Each washing zone comprises at least one means 13 for spraying wash water on the dishes. In this configuration of a dishwashing machine 1, one of said washing zones 10 or 11 can be washed without contaminating by soiling or splashing wash water said second washing zone 10 or 11.

According to a preferred embodiment, the watering means 39 comprise a fixed irrigation boom.

Other watering means 39 may be used, such as for example a rotary nozzle or an oscillating nozzle.

According to the method of the invention implemented, for example, during the step of washing, the method starts with at least one step of spraying washing water in a zone 40 between the counter door 23 and the facades 24 of baskets 14.

This washing water spray step may be a function of the dish load in the tank 2 or the amount of detergent products.

Then, a washing water spraying step in the zone 40 between the counter-door 23 and the facades 24 of baskets 14 is performed alternately with a step of spraying washing water on the dishes.

Thus, the total power of the pump 20 is available for spraying washing water on the one hand on the dishes and on the other hand in a zone 40 between the counter door 23 and the facades 24 of baskets 14.

According to an alternative embodiment, it is possible to carry out a step of spraying washing water in the zone 40 between the counter door 23 and the facades 24 of baskets 14 simultaneously with a step of spraying washing water on the dishes.

According to another variant of the invention, the washing process of the counter door 23 is implemented automatically between the washing cycles after each addition of dirty dishes in the dishwasher 1.

In another embodiment of the invention, the dishwashing machine 1 proposes to the user to start a washing cycle of the counter door 23 after each addition of dishes.

According to this method, the quality of the back door 23 is obtained by means of watering means 39 making it possible to avoid the shadow zones created by the facades 24 of the baskets 14 for the jets of washing water of the means. spraying 13.

We will now describe, with reference to Figure 6, a dishwashing machine according to the invention.

This dishwashing machine 1 comprises a tank 2 connected to a hydraulic circuit 35 comprising at least one pump 20, whose front face 3 of said tank 2 is closed by a door 4, and said tank 2 is surrounded by a housing 5 comprising an upper wall 6, side walls 7, a bottom wall 8 and a bottom wall 9, said tank 2 being equipped with at least one dish rack 14 comprising at least one facade 24 vis-à-vis the front face 3 of said vessel 2, as well as at least one means 13 for spraying washing water on the dishes arranged in the washing vat 2, said door 4 comprising an outer facade 22 and a counter door 23.

The door 4 of the tank 2 makes it possible to close an opening 41 made in the tank 2. This door 4 of the tank 2 can thus be movable between a closed position in which it closes the opening 41, in a sealed manner, and an open position. .

In this embodiment, and in no way limiting, the door 4 of tank 2 is pivotally mounted about an axis of rotation integral with the casing 5 of the dishwashing machine 1.

As well illustrated on the figure 5 , the dishwashing machine 1 comprises a detergent box 38 partially disposed between the counter door 23 and the facades 24 of the baskets 14 of dishes.

In this example, the detergent box 38 includes a portion for the flow of detergents between the counter door 23 and the facades 24 of the baskets 14 of dishes.

In this embodiment, the detergent box 38 is arranged on the upper part of one of the facades 24 baskets 14 dishwashing.

More specifically, in this embodiment, and as illustrated in the figure 5 , the front 24 of the dish rack 14 located in the lower part of the dishwashing machine 1 comprises the detergent box 38.

The flow of wash water between the counter door 23 and the facades 24 is directed to a pump of the hydraulic circuit 35.

In a particular embodiment, the tank 2 is divided into at least two washing zones 10 and 11 one above the other separated by at least one separation wall 12 and said washing zones 10 and 11 communicating with each other. with each other.

The embodiment described makes it possible to use a single box of detergent products 38. The use of such a dishwashing machine 1 is simplified for the user since there can be no mistaken product box. detergents 38 when launching a washing program.

In addition, the detergent box 38 is convenient to access.

More particularly, the partition wall 12 comprises at least one feed channel 37 for washing water.

Thus, the partition wall 12 comprises as many washing water supply channels 37 as washing zones 10 and 11.

Each washing water supply channel 37 is connected to a part of the hydraulic circuit 35 corresponding to a washing zone 10 or 11 of the tank 2.

The detergent box 38 is supplied with wash water by a part of the hydraulic circuit 35 of a washing zone 10 or 11 or by at least two feed channels 37 at the same time.

The washing water supply of the detergent box 38 is carried out by at least one branch of the supply circuit parts of the spraying means 13.

The washing water supply of the detergent box is carried out at a flow rate of the order of 3L / min.

The detergent box 38 is fed with at least two jets of wash water. Each jet of washing water corresponds to the spraying of a washing zone 10 or 11. The detergent box 38 is emptied under the effect of one or other of the jets of wash water or at least two streams of wash water simultaneously.

The detergent box 38 is connected to at least one washing water supply channel 37 supported by the partition wall 12.

Preferably, the detergent box 38 is supplied with washing water simultaneously by at least two supply channels 37 supported by the partition wall 12.

The washing water supply of the detergent box 38 causes the dissolution and flow of detergents.

This detergent box 38 is disposed in a housing 24 of a basket facade 14 to protect the washing zone (s) 10 or 11 located beneath the flows of washing water loaded with detergents.

In one embodiment, the detergent box 38 is attached to the partition wall 12 by clipping means.

In another embodiment, the partition wall 12 comprises a housing inside which the detergent box 38 moves longitudinally.

The detergent box 38 channels the washing water flows into the zone 40 between the counter-door 23 and the facades 24 of the baskets 14.

According to a variant of the invention, the partition wall comprises a means for cutting off the supply of washing water such as a valve of the thermal or electrical type.

Thus, dispensing detergent products is compatible with a dishwashing machine 1 comprising a wash cycle with a prewash step for at least one washing zone 10 or 11.

According to a variant of the invention, the detergent box 38 is powered by an independent circuit.

The washing process in a dishwashing machine as described above will now be described.

According to the process of the invention implemented, for example, during the washing phase, the process starts with a first step of supplying washing water to the detergent box.

This volume of water may be a function of the load of dishes in the tank 2 or the amount of detergents.

Then, a dissolution of the detergents contained in the product box detergents is carried out.

A partial amount of washing water contained in the tank 2 is sucked by the feed pump and circulation. This washing water is fed into a feed channel 37 in order to dissolve the detergent product contained in the detergent box 38.

This washing water passes through the detergent box 38 and at least a portion of the detergents is discharged to the pump 20 by flowing in the zone 40 between the counter door 23 and the basins 24 facades 14, and leads in the supply circuit of the spraying means 13 and sprinkler 39.

Then, the wash water feeds at least one active washing zone.

We will now describe, with reference to the figure 1 a hot rinsing process in a dishwashing machine 1 comprising at least one tank 2 connected to a hydraulic circuit 35 comprising at least one pump, said tank 2 is equipped with dish racks 14, whose front face 3 of said tank 2 is closed by a door 4, and surrounded by a housing 5 comprising an upper wall 6, side walls 7, a bottom wall 8 and a bottom wall 9, and at least one water spraying means 13 washing on the dishes disposed in the washing tank 2, said tank 2 comprises at least two washing zones 10 and 11, and means for heating the tank 2.

The invention consists in allowing the drying of all types of dishwashing in a uniform manner regardless of the washing zone 10 or 11 of the tank 2. In fact, the dishes have different drying behaviors depending on the nature of the materials, the size of the dishes, the use of the dishes and the quality of the air circulation in the washing areas 10 and 11 in the tank 2.

According to a preferred embodiment of the invention, the tank 2 comprises the tank at least two washing zones 10 and 11 having different drying temperatures.

Advantageously, a temperature T1 is between 60 ° C and 70 ° C and a temperature T2 is between 63 ° C and 73 ° C.

In addition, the temperature T2 is greater than the temperature T1.

According to the implementation method, the process starts with a first step of heating the washing tank 2 to a temperature threshold T1.

The course of the hot rinsing step to a temperature T1 is in accordance with a current process in a dishwashing machine 1.

Then, the rinse water circulation is stopped in at least a first zone 10 or 11 of the tank 2 where the initial drying temperature is T1.

In parallel with this stop of the circulation of water in a first washing zone 10 or 11, the circulation of the rinsing water and the heating in at least said second zone 10 or 11 of the washing tank 2 is maintained to reach the initial drying temperature T2 of said zone 10 or 11.

This solution makes it possible to rebalance the drying results without loss of unnecessary energy.

The rinsing cycle stops in the washing zone 10 or 11 requiring a lower drying temperature than in the other washing zones 10 or 11. On the other hand, the rinsing cycle and the water heating continue in the washing zones 10 or 11. active washing zones up to a temperature T2. In this way, all drying balances are possible.

In a particular embodiment, the tank 2 is divided into at least two washing zones 10 and 11 one above the other separated by at least one partition wall 12 and said zones 10 and 11 communicating with each other. one with the other.

In a dishwashing machine 1, where the drying step is simultaneous in at least two washing zones, the hot rinsing step makes it possible to homogenize the drying performance by offsetting the problems of pressure drop associated with the drying. ventilation of the tank 2.

According to another characteristic of the invention, each washing zone 10 or 11 comprises a spraying means 13 for rinsing water on the dishes.

Preferably, an emptying of rinsing water contained in the tank 2 is performed so as to retain the necessary amount of rinsing water for the hot rinsing step of said at least second washing zone 10 or 11.

In a particular embodiment, a branch of the hydraulic circuit 35 is associated with each washing zone 10 and 11.

Here, the dishwashing machine 1 comprises a single pump 20 for supplying the entire hydraulic circuit 35.

Typically, a washing zone 10 or 11 is dedicated to small pieces of crockery and a washing zone 10 or 11 is dedicated to large pieces of crockery.

Preferably, the hydraulic circuit comprises a hydraulic distributor for supplying at least one of said washing zones 10 or 11, comprising in particular a valve and a valve.

According to this method, a significant reduction in the water consumption is achieved by reducing the amounts of water per washing zone 10 and 11. The spray in washing water that washing zones 10 and 11 requiring a hot rinsing step more long at a higher temperature also results in a decrease in the energy required and the time of completion of this step.

Of course, the present invention is not limited to the modes of embodiment described and represented, but encompasses, on the contrary, any variant within the reach of the skilled person and among others, the use of such a method and device in any system using network water.

Claims (13)

1. A dish washing and drying machine comprising a tub (2) connected to a hydraulic circuit (35), whose front face (3) is closed by a door (4), and said tub (2) being surrounded by a casing (5) comprising an upper wall (6), side walls (7), a back wall (8) and a lower wall (9), said tub (2) being equipped with dish racks (14) comprising at least one façade (24) facing the front face (3) of said tub (2), as well as at least one means for spraying (13) washing water onto the dishes placed in the wash tub (2), said door (4) comprising an exterior façade (22) and an inner door (23), characterized in that means of sprinkling (39) are built in the upper wall (28) of the wash tub (2) to spray washing water in an area (40) comprised between the inner door (23) and the façades (24) of racks (14), and said means of sprinkling (39) spray washing water directly onto the inner door (23).
2. A dish washing and drying machine according to claim 1, characterized in that the tub (2) is divided into at least two washing areas (10, 11), one above the other, separated by at least one separation wall (12) and said washing areas (10, 11) communicating with one another.
3. A dish washing and drying machine according to claim 2, characterized in that each washing area (10, 11) comprises at least one means of spraying (13) washing water onto the dishes.
4. A dish washing and drying machine according to any one of the claims 1 to 3, characterized in that the means of sprinkling (39) comprise a sprinkling arm.
5. A dish washing and drying machine according to claim 4, characterized in that the sprinkling arm is fixed.
6. A dish washing and drying machine according to any one of the claims 1 to 5, characterized in that a hydraulic distributor is disposed in the hydraulic circuit (35) to supply the means of sprinkling (39) of the inner door (23).
7. A dish washing and drying machine according to any one of the claims 1 to 6, characterized in that the means of sprinkling (39) comprise a rotating nozzle.
8. A dish washing and drying machine according to any one of the claims 1 to 7, characterized in that the means of sprinkling (39) comprise an oscillating nozzle.
9. A method for washing in a dish washing and drying machine comprising a tub (2) connected to a hydraulic circuit (35), whose front face (3) is closed by a door (4), and said tub (2) being surrounded by a casing (5) comprising an upper wall (6), side walls (7), a back wall (8) and a lower wall (9), said tub (2) being equipped with dish racks (14) comprising at least one façade (24) facing the front face (3) of said tub (2), as well as at least one means for spraying (13) washing water onto the dishes placed in the wash tub (2), said door (4) comprising an exterior façade (22) and an inner door (23), characterized in that it comprises at least one step of spraying washing water in an area (40) comprised between the inner door (23) and the façades (24) of racks (14), and the washing water is sprayed directly onto the inner door (23) by means of sprinkling (39).
10. A washing method according to claim 9, characterized in that a step of spraying washing water into an area (40) comprised between the inner door (23) and the façades (24) of racks (14) is done in alternation with a step of spraying washing water onto the dishes.
11. A washing method according to claim 9, characterized in that a step of spraying washing water in the area (40) comprised between the inner door (23) and the façades (24) of racks (14) is done at the same time as a step of spraying washing water onto the dishes.
12. A washing method according to one of the claims 9 to 11, characterized in that a step of spraying washing water onto the inner door (23) allows the distribution and dilution of detergent products contained in a box (38) built into the inner door (23).
13. A washing method according to any one of the claims 9 to 10 or 12, characterized in that the total power of the pump (20) is available for the spraying of washing water onto the dishes and in an area (40) comprised between the inner door (23) and the façades (24) of racks (14).

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