ES2658102T3 - Washing dish for two-part dishwasher - Google Patents

Abstract

Dishwashing machine comprising a washing tank (2) having a bottom wall (4), side walls (5) and a bottom wall (6) forming a cavity (7) for dishwashing, wherein the front face (8) of the cavity (7) is closed by a door (9), characterized in that said washing tank (2) comprises an upper part of the tank (3) of plastic material connected to said wall bottom (4) and said side walls (5), and said bottom wall (4) and said side walls (5) and the bottom wall (6) that form the cavity (7) are made of stainless steel.

Description

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Washing dish for two-part dishwasher.

The present invention relates to a machine for washing dishes and a two-part washing tank.

In general, it refers to machines for washing household dishes that comprise a washing tank whose upper wall is plastic and the other walls are stainless steel.

Traditionally, a washing tank, which allows the washing of the dishes loaded in the baskets, is made of stainless steel, and generally, said washing tank comprises two or three parts assembled together by means of fixing means, such as for example a welding or crimping procedure.

There are two configurations of assembly of the tank of a machine to wash the dishes.

In a first configuration, the tank comprises a ferrule constituted by the side walls and by a bottom wall, assembled to a lower wall and an upper wall.

In a second configuration, the tank comprises a ferrule constituted by the side walls, by an upper and a lower wall, assembled to a bottom wall.

This washing tank is then fixed to an assembly structure of the dishwashing machine and supporting operating elements such as a pump, rinsing means, a bucket, etc.

In addition to the material cost of stainless steel, the manufacturing process of the stainless steel washing tank is long and expensive.

The realization of a washing tank with a plastic top wall allows to integrate numerous functions in a single piece and, consequently, reduce the number of parts that are related to the operating elements, the fixing parts and the necessary means for the realization of a dishwasher of this type.

Patent application WO03 / 041557 is known which discloses a dishwashing machine comprising a washing tank whose side, bottom and top walls are made of steel and a base made mainly of plastic material constitutes the bottom wall of said washing tank.

On the other hand, it is known patent application WO2006 / 010743 referring to a machine for washing dishes whose side and bottom walls are made by a single metal part, while the upper and lower walls are made of plastic material.

The dishwashing machines described in these documents have the disadvantage of using a washing tank whose bottom wall is made of plastic, however, during the washing phases the bottom wall of a washing tank is subjected to bath flow wash that can reach high temperatures and dirt, likely to rapidly deteriorate the appearance of this lower wall.

The object of the present invention is to provide a machine for washing dishes that can, on the one hand, have the advantages of a machine for washing conventional dishes, and on the other hand, be produced by a quick method that limits the number of pieces.

The present invention aims to solve the aforementioned drawbacks and propose a machine for washing dishes and an associated washing tank, facilitating the assembly of the two parts of the tank and integrating the technical functions of the machine for washing dishes.

To this end, the present invention relates, according to a first aspect, to a dishwashing machine comprising a washing tank having a bottom wall, side walls and a bottom wall that forms a cavity for dishwashing , in which the front face of the cavity is closed by a door.

According to the invention, the washing tank comprises an upper plastic wall connected to said bottom wall and said side walls, said bottom wall, said side walls and said bottom wall forming the stainless steel cavity.

The use of stainless steel on visible walls makes the product aesthetic.

The upper plastic wall is poorly visible by the user. That is why this piece can be made of a material other than stainless steel.

In addition, the use of a plastic material for the upper wall of the washing tank allows several

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components. This embodiment is particularly advantageous, since parts of the water circulation and drying air circuits are made in the upper part of the washing tank, where only one manufacturing stage is necessary and consequently, it represents a significant time savings compared to a conventional dishwasher assembly method.

In addition, the integration of functions in the upper wall makes it possible to suppress fixing and sealing means, such as for example clamps, screws, joints.

According to another preferred feature of the invention, the drying air circuit part of the upper wall comprises at least a lower part of the drying air extraction duct.

Thus, water vapors can be extracted from the washing tank during the drying phase either by natural convection or by forced convection.

According to another preferred feature of the invention, the upper wall of the washing tank comprises a back face facing the front face of the washing tank.

This separation between the front face of the upper wall and the front face of the washing tank allows a door to be made with an extension corresponding to the height of the upper wall. In this way, the upper part of the door is deeper and can comprise, in particular, enlarged control areas.

According to another preferred feature of the invention, the plastic material of the upper wall of the washing tank comprises acoustic and energy functionalities.

The washing tank can thus allow energy savings and reduce the noise level of the dishwasher. The density and specific heat of the upper wall material are the two main parameters that allow the material to be defined. The plastic material chosen in a dishwasher of this type can comprise these two characteristics while a traditional plastic material does not allow equivalent results.

According to another preferred feature of the invention, the upper wall of the tank comprises a water distribution housing of a drying air condensing means.

The addition of a water distribution housing makes it possible to supply a condensation medium with water. In particular, water flows can occur along a wall of the wash bowl ferrule to allow cooling of the wash tub.

The present invention also relates, according to a second aspect, to a method of assembling the upper wall in the cavity of the washing tank formed by the bottom, side and bottom walls for a dishwashing machine such as the which has been described above.

Other particularities and advantages of the invention are further apparent from the following description.

In the attached drawings, provided by way of non-limiting examples:

- Figure 1 is a perspective view of the assembled washing tank of a dishwasher according to an embodiment of the invention;

- Figure 2 is a perspective view of an upper wall of a washing tank of a dishwasher according to an embodiment of the invention;

- Figure 3 is a top view of a top wall of a washing tank according to an embodiment of the invention;

- Figure 4 is a bottom view of a top wall of a washing tank according to an embodiment of the invention;

- Figure 5 is a sectional view according to the cutting plane A-A of Figure 3;

- Figure 6 is a sectional view according to the cutting plane B-B of Figure 3;

- Figure 7 is a detailed view of the assembly of the upper part of the tank with the ferrule of the washing tank

according to the invention; Y

- Figure 8 is a sectional view according to the cutting plane C-C of Figure 2.

First, with reference to Figure 1, a machine structure for washing dishes 1 according to

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This dishwashing machine 1 comprises a washing tank 2 having a bottom wall 4, side walls 5 and a bottom wall 6 that form a cavity 7 for washing the dishes, in which the front face 8 of the Cavity 7 is closed by a door 9.

Said wash tank 2 comprises an upper part of the tank 3 of plastic material connected to said bottom wall 4 and said side walls 5, and said bottom wall 4 and said side walls 5 are made of metal and said top part of tank 3 It comprises a part of the drying air circuit 10.

This upper part of tank 3 which is made of plastic and of a single monobloc piece can be made, for example, by an injection molding process.

With such a manufacturing process, the upper part of tank 3 can integrate numerous fixing means such as those described below.

The shape, material thicknesses and plastic material of the upper part of tank 3 of the washing tank 2 are adapted according to the respective functional requirements.

Naturally, the thicknesses of the upper part of tank 3 of the washing tank 2 can vary according to the stresses exerted depending on the different zones of said upper part of tank 3.

This upper part of tank 3 allows, in particular, to integrate numerous functions, such as for example means for fixing electrical cables and water pipes, walls of the drying air circuit 10, with the aim of reducing the number of parts that constitute the dishwashing machine 1, as illustrated in figure 2.

In this case and in no way absolutely limiting, the part of the drying air circuit 10 of the upper part of the tank 3 comprises at least one lower part 27 of the drying air extraction duct, a lower part of the volute 11 of a fan and fixing means 12 of the lower part of the drying air extraction duct with an upper part 28 of the drying air extraction duct.

In addition, the part of the drying air circuit 10 of the upper part of tank 3 may comprise sealing means.

In this case, and in an absolutely non-limiting manner, the part of the drying air circuit 10 of the upper part of the tank 3 is connected to an external means for condensing the drying air.

Preferably, the bottom wall 4, the side walls 5 and the bottom wall 6 that form the cavity 7 are made of stainless steel in order to give an aesthetic appearance to the machine for washing the dishes 1 and to respond a priori about the ease for cleaning said walls 4, 5 and 6.

As illustrated in Figure 1, this advantageous embodiment of the invention allows the cavity 7 of the washing tank 2 to be formed independently of the upper part of the tank 3. This upper part of the tank 3 can be customized according to the models to integrate only the necessary functions.

In this way, the manufacture of the upper parts of Cuba 3 is carried out at the last moment according to the model to be produced and allows to optimize the production management of the workshop in view of the assembly of the cavity 7 and the upper part of Cuba 3.

Except for these production considerations, the upper part of tank 3 is hardly visible by the user from the outside of the dishwashing machine 1. Consequently, the upper part of tank 3 provides the advantage of not affecting the aesthetics of the dishwashing machine 1.

In addition, this upper part of Cuba 3 allows to improve the acoustic and energy efficiency of the machine for washing dishes 1.

In this case, and in an absolutely non-limiting manner, the material of the upper part of tank 3 of the washing tank 2 is made of polypropylene loaded with barium sulfate.

In this regard, the mass of barium sulfate is in a range between 10 and 80% of the total mass of the upper part of Cuba 3.

Preferably, the mass of barium sulfate is preferably of the order of 40%.

The plastic material has a specific heat of less than or equal to 1.5 kJ / kg.K, preferably of the order of 1.27

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kJ / kg.K.

The plastic material has a density greater than or equal to 1.20, preferably of the order of 1.28.

In this case, the upper part of tank 3 of the washing tank 2 comprises a water distribution housing 14 of a means for condensing the drying air (not shown).

For this purpose, this water distribution housing 14 comprises sealing means.

This water distribution housing 14 of a drying air condensing means comprises water flow holes in at least one wall of the washing tank 2.

In this case, the upper part of tank 3 of the washing tank 2 comprises fixing and feeding means (not shown) of at least one rinse means 23 of the washing tank.

In addition, the upper part of tank 3 comprises a housing 24 for fixing a lamp that illuminates the interior of the washing tank 2. This lamp 24 is operated by means of electrical power supplies such as those known to those skilled in the art.

Next, with reference to Figures 2 and 7, the fixation of this upper part of tank 3 in a wash tank 7 cavity 2 is described.

The upper part of tank 3 is formed by substantially vertical walls 15, as illustrated in Figure 2, which allows the cavity 7 to be joined with said upper part of tank 3.

This upper part of tank 3 of the washing tank 2 and the bottom wall 4, the side walls 5 and the bottom wall 6 of stainless steel forming a cavity 7 for washing the dishes comprise connection areas 17 between said part upper bowl 3 and said wash cavity 7, as illustrated in figure 6.

The connection areas 17 comprise parts with recesses 18 in the upper part of tank 3 of the washing tank 2 and protruding parts 19 in the walls 4, 5 and 6 that form the washing cavity 7.

The upper part of Cuba 3 has shapes that allow an assembly to be made by gluing the upper part of Cuba 3 with the stainless steel cavity 7.

The assembly by gluing the upper part of the tank 3 with the cavity 7 of the dishwashing machine 1 can be carried out by depositing a tail cord in the connection areas 17 comprising parts with recesses 18 in the upper part of the Cuba 3.

This assembly by gluing can also be carried out by means of glue injection through introduction holes arranged in the upper part of tank 3.

The glue used for an assembly by gluing the upper part of tank 3 with the cavity 7 is similar to that of the sealing means.

The connection areas 17 are adapted to receive these sealing means so that water leaks between the upper part of tank 3 and the cavity 7 are suppressed.

In this regard, these connection zones 17 comprise overflow holes of said sealing means. These overflow holes have two functions.

At first, these overflow holes serve as outlets to allow the trapped air between the upper part of tank 3 and the cavity 7 to be able to exit during assembly.

In a second moment, these overflow holes allow the sealing means to remove the excess out of the connection areas 17 so as not to create excessive thickness. In this way, the placement of the upper part of tank 3 in the cavity 7 is guaranteed.

In particular, the sections of the connection areas 17 of the upper part of the tank 3 of the washing tank 2 are V-shaped, each V-shaped section being connected to the projecting parts of the walls 4, 5 and 6 of wash cavity 7.

In this embodiment, the upper part of tank 3 of the washing tank 2 comprises a front face 20 behind the front face 8 of the washing tank 2.

The upper part of tank 3 comprises a housing 22 that allows the fixing of a sealing gasket.

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In addition, this sealing gasket can extend through a wall of the washing tank 2 to form only one piece.

In order to guarantee the rigidity of the structure of the washing tank 2, the upper part of the tank 3 of the washing tank 2 comprises at least one reinforcing cross member 21 of the structure of the machine for washing the dishes 1.

This reinforcing cross member 21 is made in the front part of the machine for washing the dishes 1.

Preferably, the upper part of tank 3 comprises two reinforcing cross members 21 arranged to stiffen the product along the X axis.

In this embodiment, the two reinforcing cross members 21 are each arranged at one end of the upper part of tank 3.

Preferably, this reinforcing cross member 21 is shaped like a honeycomb.

Said at least one reinforcing cross member 21 is integrated in the upper part of bowl 3 to reinforce the structure of the machine for washing the dishes 1 without requiring additional parts.

The shape of said at least one reinforcing cross member 21 comprises cells to absorb the impacts and deformations suffered by the upper part of tank 3 along the X axis but also along a horizontal axis and perpendicular to the X axis.

In addition, the upper part of tank 3 comprises means for fixing a rear wall of a housing that closes said washing tank 2, also fixing means for uprights arranged on the side walls 5 of the washing tank 2, fixing means 19 in the form of elastic legs to guarantee the positioning of the machine to wash the dishes 1 with respect to an insert that has a work plane as a function, as well as fixing means 25 of an upper element that covers the upper part of the tank 3.

Next, with reference to Figures 4 and 5, the geometry of the upper part of tank 3 comprising a pyramidal shape to facilitate water flows during the different phases of a wash cycle is described.

The inclination of the surfaces 26 that constitute the upper part of tank 3 is in a range between 5 and 30 °.

Preferably, the inclination of the surfaces 26 of the upper part of tank 3 is of the order of 7 °.

According to the invention, the height of the dishwashing machine 1 is variable. The height of the upper part of Cuba 3 can be different depending on the models to fit the furniture fittings or even provide the possibility of adding an additional basket of dishes.

In this embodiment, the cavity 7 of the washing tank 2 remains identical for the set of models of machines for washing dishes 1.

The additional tableware basket can be integrated in the upper part of tank 3. In this way, the upper part of tank 3 comprises sliding means of the additional basket to allow access to the tableware pieces, such as sliding means known in a machine for washing dishes 1.

Thus, an upper part of tank 3 of washed tank 2 is obtained, which allows an optimized ease of use and product adaptability.

Naturally, numerous modifications can be made to the previous embodiments without departing from the scope of the invention, as defined by the claims.

Claims (25)

5 10 fifteen twenty 25 30 35 40 Four. Five fifty 55 60 65 1. Dishwashing machine comprising a washing tank (2) having a bottom wall (4), side walls (5) and a bottom wall (6) forming a cavity (7) for washing the crockery, in which the front face (8) of the cavity (7) is closed by a door (9), characterized in that said washing tank (2) comprises an upper part of the tank (3) of plastic material connected to said bottom wall (4) and said side walls (5), and said bottom wall (4) and said side walls (5) and the bottom wall (6) that form the cavity (7) are made of stainless steel. 2. Dishwashing machine according to claim 1, characterized in that the upper part of the tank (3) is a piece of monobloc plastic material. 3. Dishwashing machine according to claim 1 or 2, characterized in that the upper part of the tank (3) comprises a part of the drying air circuit (10). 4. Dishwashing machine according to claim 3, characterized in that the drying air circuit part (10) of the upper part of the tank (3) comprises at least one lower part (27) of the air extraction duct of dried Machine for washing dishes according to one of claims 3 or 4, characterized in that the part of the drying air circuit (10) of the upper part of the tank (3) comprises a lower part of the volute (11) of a fan . 6. Dishwashing machine according to claim 4, characterized in that the upper part of the tank (3) of the washing tank (2) comprises fixing means (12) of the lower part (27) of the air extraction duct drying with an upper part (28) of the drying air extraction duct. 7. Dishwashing machine according to any of claims 3 to 6, characterized in that the part of the drying air circuit (10) of the upper part of the tank (3) comprises sealing means. A dishwashing machine according to any one of claims 3 to 7, characterized in that the part of the drying air circuit (10) of the upper part of the tank (3) is connected to an external means for condensing the drying air . 9. Dishwashing machine according to any of the preceding claims, characterized in that the plastic material has a specific heat of less than or equal to 1.5 kJ / kg.K, and preferably of the order of 1.27 kJ / kg.K . 10. Dishwashing machine according to any of the preceding claims, characterized in that the plastic material has a density greater than or equal to 1.20, and preferably of the order of 1.28. 11. Dishwashing machine according to any of the preceding claims, characterized in that the material of the upper part of the tank (3) of the washing tank (2) is made of polypropylene loaded with barium sulfate. 12. Dishwashing machine according to claim 11, characterized in that the mass of barium sulfate is in a range between 10 and 80% of the total mass of the upper part of the tank (3). 13. Dishwashing machine according to claim 12, characterized in that the mass of barium sulfate is preferably of the order of 40%. 14. Dishwashing machine according to any of the preceding claims, characterized in that the upper part of the tank (3) of the washing tank (2) comprises a water distribution housing (14) of a means for condensing the air of dried 15. Dishwashing machine according to any of the preceding claims, characterized in that the upper part of the tank (3) of the washing tank (2) comprises fixing and feeding means of at least one rinsing means (23) of the wash tank. 16. Dishwashing machine according to any of the preceding claims, characterized in that the upper part of the tank (3) of the washing tank (2) comprises at least one reinforcing cross member (21) of the structure of the washing machine the dishes (1). 17. Dishwashing machine according to any of the preceding claims, characterized in that the upper part of the tank (3) of the washing tank (2) comprises means for fixing the pipes 5 10 fifteen twenty 25 30 Water.
18. Dishwashing machine according to any of the preceding claims, characterized in that the upper part of tank (3) of the washing tank (2) comprises means for fixing the electric cables.
19. Dishwashing machine according to any of the preceding claims, characterized in that the
upper part of tank (3) of the washing tank (2) and the bottom wall (4), the side walls (5) and the Bottom wall (6) of stainless steel forming a cavity (7) for dishwashing comprise connection zones (17) between said upper part of bowl (3) and said washing cavity (7). 20. Dishwashing machine according to claim 19, characterized in that the connection zones (17) comprise recessed parts (18) in the upper part of the tank (3) of the washing tank (2) and protruding parts (19 ) on the walls (4, 5 and 6) that form the wash cavity 7. 21. Dishwashing machine according to claim 19 or 20, characterized in that the connection zones (17) are adapted to receive sealing means. 22. Dishwashing machine according to claim 21, characterized in that the connection zones (17) comprise holes for inserting the sealing means. 23. Dishwashing machine according to claim 21 or 22, characterized in that the connection zones (17) comprise overflow holes of the sealing means. 24. Dishwashing machine according to any of claims 20 to 23, characterized in that the sections of the connection areas (17) of the upper part of the tank (3) of the washing tank (2) are V-shaped. , each V-shaped section joining the protruding parts (19) of the walls (4, 5 and 6) of the wash cavity (7). 25. Dishwashing machine according to any of the preceding claims, characterized in that the upper part of the tank (3) of the washing tank (2) comprises a front face (20) behind the front face (8) of the wash tank (2).