DE102013220689A1 - Water-conducting household appliance - Google Patents

Abstract

A water-conducting household appliance with a water treatment room and with a water supply to and from the water treatment room as a dishwasher has an impeller pump therein, wherein the impeller pump has a pump chamber, an impeller with a rotation axis in the pump chamber and a drive motor for the impeller. The axis of rotation extends vertically or perpendicular to a base of the household appliance. The impeller may be provided directly to an underside of a drain from the water treatment room or only a small distance thereto.

Description

Field of application and state of the art

The invention relates to a water-conducting household appliance with a water treatment room and with a water guide, in particular a washing machine or dishwasher.

For example, from the DE 10 2011 003 464 A1 an impeller pump for such a water-conducting household appliance is known. It is connected by means of pipe connection or hose connection as a water supply to a water treatment room or interior of the household appliance and pumps there water. It can either dispose of the pumped water in a drain or heat it by a built-in heater and lead back into the water treatment room.

Task and solution

The invention has for its object to provide a water-conducting household appliance mentioned above, can be avoided with the problems of the prior art and it is in particular possible to make a water-bearing household appliance practical, small or space as possible and integrated.

This object is achieved by a household appliance with the features of claim 1. Advantageous and preferred embodiments of the invention are the subject of further claims and are explained in more detail below. The wording of the claims is incorporated herein by express reference.

It is envisaged that the household appliance has a water supply from and / or to the water treatment room. This is just known from a dishwasher or washing machine. Furthermore, the household appliance has an impeller pump or pump in the water supply. This impeller pump has a pump chamber, an impeller or an impeller with a rotation axis in the pump chamber and a drive motor for the impeller.

According to the invention, it is provided that the axis of rotation of the impeller pump extends substantially vertically or perpendicular to a base surface of the household appliance. By substantially vertical, an angle of 80 ° 100 ° shall be understood below, advantageously 85 ° to 95 °.

As a result, an efficient suction of water from the water treatment room or from a sump of the water treatment room is possible. Furthermore, the impeller pump can be provided very close to the water treatment room or with only a small distance. In this case, an inlet, which is, for example, tube-like, opens into the pump chamber directly on an underside or on an outlet from the water treatment space. Thus, it is possible that the impeller pump is located directly below the water treatment room. This reduces the space required and allows for greater integration or a larger trained water treatment room.

In an advantageous embodiment of the invention, it is possible that the inlet to the pump chamber may surround the axis of rotation or the axis of rotation of the impeller advantageously passes through the inlet, particularly advantageously centrally through the inlet. Such an inlet may be tubular, in particular circular, and have a small length, here for example from 0.5 cm to 5 cm. The smaller this length or the distance to the bottom of the water treatment room, the closer the impeller pump may be provided on the water treatment room or on its underside or near the swamp to reduce the overall height.

In an advantageous further embodiment of the invention, it is possible that an upper edge of the pump chamber, for example, a maximum of 3 cm to 15 cm below the water treatment room before the bottom or the drain or before the maximum cross section of the water treatment room. Again, this should be a measure of how close the impeller pump is located on the water treatment room. It can also be provided that means are provided on the top of the impeller pump or around the aforementioned inlet for attaching and sealing this attachment to the water treatment room. Thus, it is possible that the pump even directly abuts with an upper side or the upper side of the pump chamber on an underside of the water treatment chamber or on an underside of a sump of the water treatment chamber. A distance may alternatively be 1 cm or less.

A direct concern allows for the aforementioned maximum integration or minimum total height of the arrangement of water treatment room and impeller pump. Furthermore, can be dispensed with intermediate parts between the water treatment room and the impeller pump, so that both the design effort and the assembly costs are reduced. For this purpose, the impeller pump can, for example, have a tubular inlet projecting upwards over the upper side of the pump chamber, as described above. He can just have the aforementioned length. This inlet can then into a corresponding opening at the bottom of the water treatment room are plugged directly, advantageously sealed by special sealing means, in particular elastic sealing means. This allows, as it were, an insertion of the impeller pump with its inlet from below into a corresponding outlet opening or drain opening of the water treatment room.

Furthermore, an outlet is provided on the impeller pump, through which the water is conveyed out of the pump chamber. This outlet may advantageously extend in a direction substantially perpendicular to the axis of rotation. Since this direction is then substantially parallel to the bottom of the water treatment room, the height of the functional unit water treatment room and impeller pump is further reduced.

Advantageously, the water treatment room form a separate unit or consist of such a unit. The same can apply to the pump. If the impeller pump is connected directly and without intermediate parts to the water treatment room or its outlet or a lower depression of the sump, it is advantageous to provide only the abovementioned sealing means which, however, negatively affect neither size nor overall height.

Particularly advantageously, the water treatment room has a drain at its lowest point or at a lower depression. On the one hand, this lowermost point can lie relatively centrally to a total cross section of the water treatment space. Alternatively, it may be displaced to one side to allow more convenient positioning of the impeller pump at the bottom of the drain in the home appliance. In the lowest area of the water treatment room, a depression may be provided, with a height of a few cm, for example 0.5 cm to 3 cm. This is enough to collect water and to remove it easily and completely.

For a compact design of water treatment room and impeller pump can be provided that a top portion of the impeller at the level of the bottom or the drain of the water treatment room or on the underside of a sump or a lower recess of the water treatment room is arranged. He can also reach just below, for example, to reach a maximum of 2 cm to this bottom.

In an advantageous embodiment of the invention, a heating element or a heating device is provided on or in the pump chamber, as it is known from DE 10 2011 003 464 A1 is known. Here, an attachment to an outside or in an outer region of the pump chamber has proven itself. Advantageously, the heating device or the heating element lies approximately at the axial height of the impeller, in particular at the axial height of an outlet from the impeller. Here, the flow rate is greatest and thus the heat loss for the fastest possible heating of pumped through water.

In yet another advantageous embodiment of the invention, the drive motor may be integrated into the pump or in the pump chamber, for example, be surrounded by the pump chamber at the same axial height. It may advantageously be a so-called wet runner, he can be lapped in particular of water. The structure of the impeller pump can be such that the drive motor is approximately at the axial height of an outlet from the pump chamber. Thus, the pump housing and thus the entire pump must not be unnecessarily large or high for a low overall height. Rather, it can be built in width, so that its width or a diameter of the pump chamber is greater than the height of the pump or the pump chamber. This can be 10% to 100% larger, possibly even more.

These and other features will become apparent from the claims but also from the description and drawings, wherein the individual features each alone or more in the form of sub-combinations in an embodiment of the invention and in other fields be realized and advantageous and protectable Represent embodiments for which protection is claimed here. The subdivision of the application into intermediate headings and individual sections does not limit the general validity of the statements made thereunder.

Brief description of the drawings

Embodiments of the invention are shown schematically in the drawings and are explained in more detail below. In the drawings show:

1 a schematic view of a dishwasher as a household appliance according to the invention,

2 an enlarged section of a dishwasher one swamp 1 forming recess with pump on it,

3 a sectional view through the arrangement 2 .

4 an oblique top view of the arrangement 2 .

5 a modification of the presentation 2 without gap between bottom of recess and pump and

6 a section through the arrangement 5 ,

Detailed description of the embodiments

In the 1 is schematically a dishwasher 11 as a household appliance according to the invention shown with a housing 12 and a dishwasher 14 as a water treatment room therein, which is formed in principle as usual and known. Upstairs in the dishwasher 14 is a common flushing arm 16 indicated, of course, even more rinsing arms can be provided therein, especially in the lower area. Downstairs has the sink 14 a floor 17 on, in the middle of a large depression 18 passes over, which is funnel-shaped and a swamp 19 forms with a prescribed sequence. In doing so, the depression 18 also be covered in part, for example by grating, filter or the like. The walls of the dishwasher 14 as well as the ground 17 usually consist of metal or stainless steel. The depression 18 in turn, may be made of plastic, alternatively also of metal.

At the bottom of the depression 18 is how out of 2 in magnification is clearly visible, an impeller pump or pump 22 arranged, being between pump 22 or its top and bottom of the recess 18 A gap 21 consists. This gap 21 may be a few millimeters, for example 0.5 cm. A connection of the pump 22 to the depression 18 advantageously has an in 3 illustrated seal 36 on. This is especially between the bottom of the recess 18 and an inlet 24 intended. An attachment between the two parts recess 18 and pump 22 can be done advantageously in other ways.

According to 2 points the pump 22 a pump housing 23 on with inlet 24 and outlet 25 one in 3 on average well recognizable pump chamber 26 , Due to the gap 21 is the inlet 24 can be seen in the side view, he is advantageous a short pipe socket. According to 1 goes from the outlet 25 a dashed water flow 38 which finally also to the rinse arm 16 leads. In between, the water supply 38 be formed as from the prior art, so valves, branches and processes and have more.

From the sectional view of 3 it can be seen that the pump chamber 26 as the largest area of the outer circumferential wall an annular circulating heating element 27 has, which is shown here only very simplified, but for example from the above-mentioned prior art in the form of DE 10 2011 003 464 A1 is known. The heating element 27 can be made of metal and have a surface heating by surface applied distributed heating means, in particular by externally applied in sheets thick film heating resistors. The top of the pump chamber 26 and a lower portion of the pump housing 23 are advantageously formed of plastic.

In the pump chamber 26 an impeller turns 28 That's why the pump 22 just an impeller pump is. The impeller 28 has a curved upper cover plate 29a and a substantially flat lower cover plate 29b on. It can be seen that the impeller 28 with its uppermost area, namely the upper end of the upper cover disk 29a , down to the level of the bottom of the recess 28 enough, here the cover disk 29a already formed tubular upwards.

The impeller 28 has a dashed axis of rotation 30 up and sitting on a rotary shaft 31 , This in turn is fixed with a rotor 33 connected or this sits on it. The rotor 33 belongs as well as an externally mounted stator 34 to a drive motor 32 for the pump 22 , From the 1 to 3 it can be seen that the axis of rotation 30 the impeller 28 essentially perpendicular or perpendicular to a base of the dishwasher 11 ,

The exact design of the pump 22 may be as shown here, but it does not have to. In particular, the embodiment of the pump chamber 26 with the wide upper area and the narrow, annular lower area also be different. Furthermore, also the drive motor 32 not so far into the pump 22 or the pump chamber 26 be involved. The drive motor 32 is designed here as a wet rotor, but can also be designed as a dry runner, as is known in the aforementioned prior art.

Out in the oblique top view 4 is once again good to see that the marsh 19 or the depression 18 as the lowest area of the sink 14 so close to the pump 22 or the pump chamber 26 with the impeller 28 is arranged that this in the oblique top view, including inlet 24 can be seen.

A modification of the invention is in the 5 and 6 according to the 2 and 3 shown. Here is a recess 118 again formed similarly funnel-shaped or conically tapering and forms a sump 119 from as the lowest part of a washing compartment not shown here accordingly 1 , The depression 118 could but directly to the dishwasher 11 of the 1 instead of the depression shown there 18 to be assembled.

At the bottom of the recess 118 is a pump 122 mounted, but this time directly and without the gap. This is especially good from the 6 to see. The pump 122 is similar to in 3 shown formed as an impeller pump and has a pump housing 123 on with inlet 124 and outlet 125 , The inlet 124 here is essentially through an opening above the impeller 128 educated. A tubular embodiment according to 3 is not provided here, but also not necessary due to the direct attachment of the pump 122 to the bottom of the recess 118 ,

The impeller 128 has an upper cover disc 129a and a lower cover disk 129b on. The topmost part of the impeller 128 or the upper cover disk 129a again lies approximately at the level of the bottom of the depression 118 , Furthermore, the impeller 128 with a dashed axis of rotation 130 on a rotary shaft 131 including drive motor 132 arranged. The drive motor 132 has a rotor 33 and a stator 34 on. The rotation axis 130 again runs recognizably vertically or at right angles to a base of the device in which the arrangement is to be installed.

A seal 136 is according to 6 outside between the depression 118 or its bottom or bottom and the pump housing 123 or the upper edge of the pump housing or heating element 127 intended. For temperature reasons, a silicone seal is advantageously provided here.

The comparison of 3 and 6 makes it clear that at the 6 the integration is even stronger, because deepening 118 and pump 122 actually be designed as a single unit. This allows a common manufacturing and assembly for a higher possible integration as well as for a more easily sealed design.

Above all, it can be seen from the figures that no separate components such as pipes, hoses or the like. between the washing room 14 or the depression 18 or 118 or the swamp 19 or 119 and the pump 22 or 122 are necessary. This reduces, as I said, the size and allows greater integration, easier-to-seal design and a simpler structure.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102011003464 A1 [0002, 0015, 0028]

Claims (10)

Water-conducting household appliance with a water treatment room and with a water supply from and / or to the water treatment room, in particular dishwasher or washing machine, wherein the household appliance has an impeller pump in the water supply and wherein the impeller pump, a pump chamber, an impeller with a rotation axis in the pump chamber and a drive motor for the impeller, characterized in that the axis of rotation extends vertically or perpendicular to a base surface of the household appliance, wherein on the pump chamber, an inlet is provided in the pump chamber, which opens directly to a bottom or at a drain from the water treatment room. Domestic appliance according to claim 1, characterized in that the inlet surrounds the axis of rotation, wherein preferably the axis of rotation is arranged centrally in the inlet and wherein in particular the inlet is tubular and has a length of 0.5 cm to 5 cm. Domestic appliance according to claim 1 or 2, characterized in that a top edge of the pump chamber is at most 3 cm to 15 cm below the water treatment room before the bottom or the drain or before the maximum cross section of the water treatment room. Domestic appliance according to one of the preceding claims, characterized in that the impeller pump with a top of the pump chamber at a bottom of the water treatment room or at the bottom of a sump of the water treatment room directly abuts or is arranged at a distance of less than 1 cm. Domestic appliance according to one of the preceding claims, characterized in that an outlet from the pump chamber extends in a direction substantially perpendicular to the axis of rotation. Domestic appliance according to one of the preceding claims, characterized in that the water treatment room consists of a structural unit and the impeller pump also consists of a structural unit, wherein the impeller pump is connected directly and without intermediate parts to the water treatment room or the drain, preferably only with elastic sealing means. Domestic appliance according to one of the preceding claims, characterized in that a drain is provided from the water treatment room at its lowest point, preferably within a recess having a height of 0.5 cm to 3 cm. Domestic appliance according to one of the preceding claims, characterized in that an uppermost portion of the impeller is disposed at the level of the underside of the water treatment room or on the underside of a sump of the water treatment room or just below, preferably max. 2 cm. Domestic appliance according to one of the preceding claims, characterized in that a heating element is provided in or on the pump chamber, in particular on an outer side of the pump chamber and preferably approximately at the axial height of the impeller. Domestic appliance according to one of the preceding claims, characterized in that the drive motor is integrated into the pump chamber, in particular is surrounded by water, wherein it is preferably arranged at the axial height of an outlet from the pump chamber.

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