ES2613837B1 - Dishwasher machine with means to vary the heat transmission to the environment - Google Patents

Abstract

The invention refers to a dishwasher machine (1) with a frame (2), which provides a housing space (3) for the dishes, and with means for varying the heat transmission of the dishwasher machine (1) to the environment , characterized in that the means comprise at least one plate (9, 10) of a thermally insulating material and an actuator (13) for moving the plate (9, 10) to a first position, in which the plate (9, 10) partially or completely covers at least one wall (4, 5, 6, 7) of the frame (2), and along the wall (4, 5, 6, 7) to a second position, in which the iron ( 9, 10) is partially or completely removed from the wall (4, 5, 6, 7).

Description

The invention refers to a dishwasher machine with a rack, which provides a storage space for the dishes, and with means for varying the heat transmission of the dishwasher machine to the environment.

WO 2009/021603 A 1 describes a dishwashing machine of this type. Here, there may be multiple slats arranged next to a side wall of the dishwasher. The slats have a high heat dissipation, and can be turned from an closed position to an open position.

A dishwashing machine of this type has the disadvantage that slats take up a lot of space in their open position in comparison.

The present invention solves the technical problem of providing a dishwashing machine that allows varying the heat transfer of the dishwashing machine to the environment in a particularly simple way.

This technical problem is solved by a dishwashing machine with the features of claim 1. Advantageous configurations with other convenient developments of the invention are the subject of the dependent claims.

The dishwashing machine according to the invention has a rack or bowl, which provides a storage space for the dishes. The means for varying the heat transfer of the dishwasher to the environment comprise at least one plate of an insulating material and an actuator for moving the plate. The actuator is configured to move the iron to a first position, in which the iron partially or completely covers at least one wall of the frame. In addition, the actuator is configured to move the iron along the wall to a second position, in which the iron is partially or completely removed from the wall.

The invention is based on the discovery that dishwasher machines should meet two different requirements during each program or wash cycle. During a cycle washing period or period, it is advantageous that the walls that form the frame are thermally insulated to thus maintain the temperature that has increased within the frame. During a second part of the wash cycle, which is a drying period,

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it is advantageous that the walls of the dishwasher machine have a high thermal conductivity, since this allows a good heat transfer from the dishwasher to the surroundings.

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When the operating cycle or washing program of the dishwasher is finished, dishes or dishes must be dried, which should be done quickly. However, insulating means that improve efficiency during the washing period have a negative effect on the drying period by prolonging the drying cycle. By placing the insulating material plate in front of the frame wall only during the washing period, and removing the insulating material plate during the drying period, greater efficiency can be achieved throughout the entire washing cycle or program. Also, the use of a continuous iron to cover the wall of the frame in the first position provides very good thermal insulation properties to the dishwasher when necessary.

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However, the sheets of the thermally insulating material can be taken to the second position by means of the actuator, that is, they can be partially removed during the drying period. To achieve this, the actuator moves the plates along the frame walls. Therefore, when the plates are moved from the second position to the first position, and conversely, the plates move along the frame walls, which will be covered and not covered, respectively, by the plates.

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Since the plates can be handled in a particularly simple way by means of the actuator, that is, by moving the plates to the first position and the second position, respectively, the dishwashing machine makes it possible to vary the heat transmission to the environment in a particularly simple way.

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Accordingly, the means can improve the washing period and the drying period or the washing cycle and the drying cycle. Similarly, increasing the efficiency of one of the cycles does not cause the efficiency of the other cycle to decrease, but rather that heat dissipation or heat transfer may occur in accordance with the requirements applicable during the different periods of a program of washing the dishwasher machine. Also, the mechanism comprising the plate with thermal insulation properties and the actuator makes the manufacturing process particularly easy.

In an advantageous embodiment, in the first position, the plate is partially or completely unwound from an axis and, in the second position, the plate is partially or completely wound on the axis. Such type of roller blind for

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moving the plate to the first position and the second position, respectively, can be implemented particularly easily. Also, during the washing period, a good coverage of the wall can be achieved with the insulating material of the iron and, during the drying period, the winding of the iron on the shaft leads to a heat transmission or heat dissipation particularly Good for the environment, since the iron can be completely removed from the wall.

It is possible to get this to be carried out as the final section of the plate is fixed to the shaft.

way particularly reliable if a

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In another advantageous embodiment, the plate is part of a belt configured to rotate around at least two coils. In this configuration, greater thermal insulation can be achieved during the washing period by placing the part of the belt comprising the insulating material in front of the wall. However, in the second position, the plate of the thermally insulating material has a greater distance with respect to the wall and, therefore, is removed from it. This makes possible a better heat transfer from the wall to the environment.

Such a conveyor belt mechanism has the advantage that, regardless of the position of the plate with respect to the wall, the mechanism occupies the same amount of space. Therefore, it is particularly simple to provide a compact dishwashing machine that has the belt with the plate (s) of the insulating material.

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Preferably, the belt comprises another plate of a material with a higher thermal conductivity than the thermally insulating material. This allows the placement of the highly thermally conductive material in front of the wall from which the heat will be transmitted to the environment, as well as the efficient dissipation of heat by the other plate during the drying period.

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As an insulating material, in particular, a sheet composed of mineral wool, a fleece material, or an aeroge can be used. Such materials do not have to be provided on a carrier material, but can be provided as a film or the like, which allow them to be unwound, rolled and driven as a conveyor belt. As a material with a high thermal conductivity a steel material can be used. If the plate of the thermally insulating material is part of a belt, the other plate with a higher thermal conductivity and the plate of insulating material can be joined by an adhesive, a tape, mechanical joints, or the like.

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Preferably, in the first position, at least a part of the plate is more

near the frame wall than in the second position. Similarly, in the second

position, at least part of the other plate is closer to the frame wall than

in the first position. The plate and the other plate can have essentially the same

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dimensions, which preferably correspond to the size of the wall or

walls to be covered. Through such an arrangement, they can be achieved

essentially complete coverage of the wall or walls to be covered

by the thermally insulating plate and by the other conductive plate

thermally and, therefore, a particularly high efficiency during the period of

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washing and drying period, respectively.

Preferably, the shaft and / or the coils are arranged on at least one edge of the

frame. This makes it possible for the wall or walls of the frame to be covered and discovered in

very simple way, which will be isolated during the washing period and will perform

greater heat transmission to the environment during the drying period.

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This applies, in particular, if the length of the shaft and / or the coils corresponds

essentially with the length of the wall that is covered or not covered by the iron of the

isolating material.

Preferably, in the first position, the iron partially or completely covers

a heat exchanger arranged on the frame wall. This exchanger of

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Heat is used during the drying period. When transporting hot and humid steam

from the accommodation space that contains the dishes to the heat exchanger, the

Humidity can be reduced by condensing water in the heat exchanger.

This improves the drying of the dishes during the drying period. During the period of

washing, thermal differences between hot water with a cleaning product used

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to wash the dishes and clean running water used to rinse the dishes can be

reduced by said heat exchanger. The advantages of the heat exchanger

they can be exploited to a large extent being covered during the washing period

by means of the insulating material plate and being discovered during the period of

dried

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If the heat exchanger is arranged on a side wall of the frame of the

dishwasher machine, it is therefore advantageous to cover this side wall with the iron of the

insulating material moved to the first position during the washing period. Of the same

Thus, it is particularly advantageous to remove the sheet of insulating material from the side wall

during the drying period.

s

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However, there are several walls that delimit the accommodation space for the dishes, which can be advantageously provided with the removable plate made of the insulating material. By way of example, the sheet of the insulating material can cover in the first position an upper wall of the frame partially or completely. Here, it is particularly easy to implement an implementation, and heat loss can be prevented very well as a result of its ascension by covering the upper wall with the iron. On the other hand, the transmission of heat to the environment is facilitated when the insulating material is removed from the upper wall during the drying period.

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It is also particularly simple to provide the plate in such a way that it covers a rear wall in the first position and that it is removed from it in the second position. Also, the removable plate can be provided on a frame door. In this case, the mechanism moves together with the door while it opens and closes to close the storage space for the dishes.

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Also, the side walls of the frame can be equipped with the removable plate of thermally insulating material.

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If a receptacle, such as a reservoir for washing liquid, is disposed on one of the side walls of the frame, notches or the like can be provided on the plate that allow the connection between said receptacle and the tank or the housing space of the dishwasher machine. If there is no reservoir for washing liquid provided on the side wall of the frame, it will be particularly simple to arrange the removable plate of the insulating material next to this side wall.

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It has also been shown to be advantageous if the dishwasher has at least one guide element configured to facilitate the movement of the plate of the insulating material to the first position and the second position, respectively. Such a guide element may be formed as a protrusion protruding from a narrow side of the plate and moving along a notch or the like. By means of such guiding elements, the plate can be moved particularly easily to the first position, for example, unrolled from the shaft, in particular, along more than one wall of the frame. By way of example, a single plate can be unwound along a first side wall, the back wall, and the other side wall of the frame.

Finally, it has been shown that it is advantageous if the dishwasher has a control unit for operating the actuator depending on a washing period and a drying period of a dishwashing machine washing program. He

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Actuator can be, for example, an electric motor configured to rotate the shaft and / or at least one coil. The control unit makes it possible to put the dishwasher into operation with great efficiency during the washing period, since the iron prevents heat loss to its surroundings in its first position. Similarly, the control unit operates the actuator to remove the iron from the frame wall during the drying period in order to increase the heat transmission to the environment. Therefore, during the drying period the condensation of the moisture contained in the steam within the housing space for the dishes can be increased.

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The features and combinations of features mentioned above in the description, as well as the features and combinations of features mentioned below in the description of the figures and / or shown alone in the figures are usable not only in the combination indicated in each case, but also in other combinations or individually, without abandoning the scope of the invention. Therefore, it should be understood that those implementations that are not explicitly shown in the figures or explained, but that can be extracted through combinations of features separate from the exposed implementations are also understood and disclosed by the invention.

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Therefore, those embodiments and combinations of features that do not have all the characteristics of an independent claim originally drafted will also be considered disclosed.

Other advantages, features and details of the invention can be drawn from the claims, the following description of the preferred embodiments, as well as based on the drawings, in which the elements with analogous functions are accompanied by the same reference symbols. Here, they show:

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Fig. 1 in schematic view, a frame of a dishwashing machine, where the sheets of insulating material can be unwound from two axes, and where the plates are arranged along opposite side walls of the frame;

Fig. 2

the dishwashing machine of figure 1, in another perspective view; Y

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Fig. 3 a variant of the dishwasher machine, where the insulating material is provided as part of a belt configured to rotate around two coils located along edges of opposite side walls of the dishwasher machine frame.

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Figure 1 schematically shows a dishwashing machine 1, which has a rack

2 with a housing space 3 for dishes. Accommodation space 3 is delimited

by walls of the frame 2, that is, a first side wall 4, a second side wall

5, an upper wall 6, a rear wall 7, and a floor panel 8. In addition, the frame 2

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it comprises a wall formed as a door (not shown), which may be, for example,

hinged to the floor panel 8. The indications "top", "floor", "back", "side",

and the like, refer to the positions and orientations of the dishwasher machine in

its intended use position with respect to an observer located in front of the machine

dishwasher and you're looking towards her.

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The plates 9, 10 of a thermally insulating material are shown in a

first position in figure 1, in which the plates 9, 10 cover the outer surfaces

of the side walls 4, 5 of the frame 2. The plates 9, 10 of insulating material

thermally, such as mineral wool or rock wool, fleece material, or a

flexible airgel, can be wound on a respective axis 11, 12 located next to edges

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rear of the frame 2. The first plate 9, which in the first position covers the wall

right side 5, can be wound on the axis 11 and unwound from it. Of the same

Thus, the second plate 10 can be wound on the axis 12 and unwound from it.

When the plates 9, 10 are wound on the axes 11, 12, the plates 9, 10 are

moved to a second position (not shown), in which plates 9, 10 are removed

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of the side walls 4, 5.

The plates 9, 10 are moved to the first position during a washing period of a

washing program or dishwashing machine cleaning program 1. Thus, the transmission

of heat to the surroundings of the dishwasher 1 is avoided or reduced by the plates

9, 10 during this washing period.

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During the drying period or time of the washing program, plates 9, 10 are

rolled on the respective axis 11, 12. This causes the heat transmission to increase

from the dishwasher 1 to the environment and, therefore, that the drying of the dishes is accelerated

contained in the accommodation space 3.

In Fig. 1, an actuator 13 is shown schematically, for example, in the form of

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electric motor. Such actuator 13 may have a gear or the like to achieve a

rotational movement of axes 11, 12. In figure 1, only shown

schematically one actuator 13. However, several actuators 13 can be provided

to move the plates 9, 10 to the first position and to the second position,

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respectively. A control unit 14 of the dishwasher 1 controls the actuator 13 depending on the washing period and the drying period of the washing program.

The insulating material in the form of the plates 9, 10, which are formed as insulating curtains, may have protrusions extending from a narrow side 23 of the plates 9, 10, that is, extending in the direction of the axes 11 , 12. Such protrusions can guide the plate 9, 10 when it is moved to the first position shown in Figure 1 or to the second position, in which the side walls 4, 5 are not covered by the plates 9, 10. plates 9, 10 are shown by way of example to enable thermal insulation of the side walls 4, 5 of the frame 2. However, also the door, the top wall 6, and the rear wall 7 can be provided with such means to vary the heat transmission of the dishwasher 1 to the environment. In addition, the insulating plate 9, 10 can be unwound around a part of the frame 2 larger than just one of the side walls 4, 5 or one of the other walls of the frame 2 mentioned above.

In Figure 2, it can be seen particularly well how the plates 9, 10 cover the side walls 4, 5 of the frame 2, when the actuator 13 has moved the plates 9, 10 along the side walls 4, 5 to the first position. If a heat exchanger is arranged next to one of the side walls 4, 5, it is particularly efficient to cover it during the washing period by means of the plate 9, 10 and leave it uncovered during the drying period. Also, insulating the upper wall 6 of the frame 2 temporarily is efficient to prevent heat loss from rising heat, that is, the heat rising upwards.

If the dishwashing machine 1 does not have a reservoir for washing liquid next to one of the side walls 4, 5, the placement of the mechanism comprising the plate 9, 10 and the axis 11, 12 together with this side wall 4, 5 is facilitated.

Figure 3 shows a variant of the dishwashing machine 1. The frame 2 again comprises the side walls 4, 5, the upper wall 6, the rear wall 7, the floor panel 8, and the door (not shown). Also here, all these walls can be equipped with the means to vary the heat transmission of the dishwasher 1 to the surroundings. In the variant of the dishwashing machine 1 shown in Figure 3, these means also comprise the plates 9, 10.

However, the sheets 9, 10 of the thermally insulating material are in this variant part of two belts 15, 16, which are shown arranged next to the side walls 4, 5

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of the frame 2. By way of example, the first belt 15 is shown arranged next to the

left side wall 4 in figure 3, and the second belt 16 is shown next to the wall

right side 5 in figure 3. Each belt 15, 16 comprises two coils 17, 18, 19, 20,

for example, in the form of elongated cylinders that extend along the edges of

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the side walls 4, 5. The belts 15, 16, which are configured as belts

conveyors, rotate around these coils 17, 18, 19, 20 if the actuator 13 (no

shown in figure 3) causes a rotational movement of at least one of the coils 17,

18, 19, 20 of each belt 15, 16. By way of example, the belt 15 rotates around the two

coils 17, 18 located next to the edges of the left side wall 4 in Figure 3, and the

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belt 16 rotates around the coils 19, 20 located next to the edges of the side wall

5 right in figure 3.

Each belt 15, 16 comprises another plate 21, 22 that has a higher conductivity

thermal than the thermally insulating material of the plates 9, 10. In Figure 3,

shows a situation in which the thermally insulating plate 10 is covering the wall

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lateral 4, while an air gap, the width of which corresponds to the thickness

of the coils 17, 18, is present between the plate 10 and the other plate 21. This other

plate 21 of a highly thermally conductive material such as steel is moved to

a position, in which the plate 21 covers the left side wall 4 in Figure 3 when

the dishwashing machine washing program 1 reaches the drying period. In this

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position, the highly thermally conductive material of the plate 21 causes it to increase

the heat transfer from the dishwasher 1 to the surroundings.

Similarly, the thermally insulating plate 9 covers the right side wall 5 of the

Figure 3, while the thermally conductive plate 22 of the belt 16 is removed

of the side wall 5. In this situation, the air gap between the plates 10, 21

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And the plates 9, 22, respectively, help increase the insulating properties of the

Straps 15, 16.

The dishwasher 1 can also have the belts 15, 16 and the mechanism shown

in figures 1 and 2, in which the sheets 9, 10 of insulating material are

unrolled from and rolled up on axes 11, 12. Despite not being shown in the

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Figure 3, the dishwasher 1 also has at least one actuator 13 for moving the

belts 15, 16 and the control unit 14 to operate the actuator 13.

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REFERENCE SYMBOLS

Dishwasher machine

2

Frame

3

Accommodation space

4

Side wall

5

Side wall

6

Upper wall

7

Back wall

8

Floor panel

9

Griddle

10

Griddle

eleven

Axis

12

Axis

13

Actuator

14

Control unit

fifteen

belt

16

belt

17

Coil

18

Coil

19

Coil

twenty

Coil

twenty-one

Griddle

22

Griddle

2. 3

Narrow side

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Claims (10)

one.

Dishwashing machine with a rack (2), which provides a storage space (3) for the dishes, and with means to vary the heat transmission of the dishwasher (1) to the environment, characterized in that the means comprise at least one plate (9, 10) of a thermally insulating material and an actuator (13) to move the plate (9, 10) to a first position, in which the plate (9, 10) partially or completely covers at least one wall (4, 5, 6, 7) of the frame (2), and along the wall (4, 5, 6, 7) to a second position, in which the plate (9, 10) is partially removed or by full wall (4, 5, 6, 7).

2.

Dishwashing machine according to claim 1, characterized in that, in the first position, the plate (9, 10) is partially or completely unwound from an axis (11, 12) and, in the second position, the plate (9, 10) is partially rolled

or completely on the shaft (11, 12).

3.

Dishwashing machine according to claims 1 or 2, characterized in that the plate (9, 10) is a part of a belt (15, 16) configured to rotate around at least two coils (17, 18, 19, 20).

Four.

Dishwashing machine according to claim 3, characterized in that the belt (15, 16) comprises another plate (21, 22) of a material with a higher thermal conductivity than the thermally insulating material.

5.

Dishwashing machine according to claim 4, characterized in that, in the first position, at least a part of the iron (9, 10) is closer to the wall (4, 5, 6, 7) of the frame (2) than in the second position, where, in the second position, at least a part of the other plate (21, 22) is closer to the wall (4, 5, 6, 7) of the frame (2) than in the first position.

6.

Dishwashing machine according to any of claims 2 to 5, characterized in that the shaft (11, 12) and / or the coils (17, 18, 19, 20) are arranged on at least one edge of the frame (2).

7.

Dishwashing machine according to any one of claims 1 to 6, characterized in that, in the first position, the iron (9, 10) partially or completely covers a heat exchanger arranged on the wall (4, 5, 6, 7) of the frame (2).

8.

Dishwashing machine according to any one of claims 1 to 7, characterized in that, in the first position, the iron (9, 10) partially or completely covers an upper wall (6) and / or a rear wall (7) and / or a side wall (4, 5) and / or a

 ES2 613 837 Al 5 rack door (2). 9. Dishwasher machine according to any one of claims 1 to 8, characterized by at least one guide element configured to facilitate the movement of the plate (9, 10) to the first position and the second position. 10. Dishwasher machine according to any of claims 1 to 9, characterized by a control unit (14) for operating the actuator (13) depending on a washing period and a drying period of a washing program of the dishwasher machine