ES2753882T3 - Water-conducting appliance - Google Patents

Abstract

Water-conducting appliance with a water treatment chamber and with a water conduit from and / or to the water treatment chamber (14), in particular a dishwasher (11) or washing machine, where the appliance has an impeller pump ( 22,122) in the water line and where the impeller pump has a pump chamber (26,126), an impeller (28,128) with a rotating shaft (30,130) in the pump chamber as well as a drive motor (32,132) for the impeller, where the rotary axis extends vertically or perpendicularly towards a base surface of the appliance, where an inlet (24,124) is provided in the pump chamber (26,126), which ends directly in a lower part (17) or in a drain (18,118) of the water treatment chamber (14), characterized in that - an outlet (25,125) of the pump chamber (26,126) is provided in the lower area of the pump (22,122), - the drive motor ( 32 132) is at axial height and is surrounded by the pump chamber.

Description

DESCRIPTION

Water-conducting appliance

Field of application and state of the art

[0001] The invention relates to a water-conducting household appliance with a water treatment chamber and with a water pipe, particularly a washing machine or a dishwasher.

[0002] For example, from DE 102011003464 A1 a propeller pump for said water-conducting household appliance is known. This is connected by means of a tubular connection or hose connection as a water pipe to a water treatment chamber or an interior space of the appliance and water is pumped there. In this case you can dispose of the pumped water in a drain or heat it with a built-in heater and take it back to the water treatment space.

[0003] US 3,117,523 A shows a water-conducting household appliance with a water treatment chamber and a pump arranged at its bottom. This pump is very flat. This pumps the water from the pump chamber laterally into a pipe, for example for later use in the appliance.

[0004] DE 112006002944 T5 shows a washing machine as another water-conducting household appliance with a water treatment chamber and a pump arranged at its bottom. The pump has a pump chamber with an impeller therein, where the impeller is driven by a drive motor arranged below. The pump chamber is flat and has a side outlet.

[0005] The invention has for its object to provide a previously mentioned water-conducting household appliance, by means of which the problems of the prior art can be avoided and, in particular, it is possible to make a water-conducting household appliance practical, small either use the space as possible or be integrated.

[0006] This objective is achieved by an electrical household appliance having the features of claim 1. Advantageous and preferred embodiments of the invention are the subject of other claims and are explained in more detail below. The wording of the claims is incorporated herein by express reference.

[0007] The appliance is provided with a water conduit from and / or to the water treatment chamber. This is only known in a dishwasher or washing machine. Also, the appliance has an impeller pump or a water line pump. This impeller pump has a pump chamber, an impeller, or a pump wheel with an axis of rotation in the pump chamber and a drive motor for the impeller.

[0008] 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 appliance. An angle of 80 ° 100 °, advantageously 85 ° to 95 °, should then be understood to be substantially vertical. In this way, an efficient extraction of water from the water treatment chamber or from a reservoir of the water treatment chamber is possible. Also, the impeller pump can be provided very close to the water treatment chamber or only with a small distance. In this case, an inlet, which is, for example, tubular, empties into the pump chamber directly at a bottom or into an outlet from the water treatment chamber. Therefore, the impeller pump may be located directly below the water treatment chamber. This reduces the space required and allows for more integration or more water treatment space.

[0009] In an advantageous embodiment of the invention, it is possible that the inlet to the pump chamber may surround the axis of rotation or that the axis of rotation of the impeller advantageously extends through the inlet, in particular advantageously centrally through the entrance. Said 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 chamber, the closer the impeller pump can be provided in the water treatment chamber or at its bottom or near the tank to reduce the height total.

[0010] In a further advantageous 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 may be located below the water treatment chamber in front from the bottom or from the drain or in front of the maximum cross section of the water treatment chamber. This should also be a measure of how closely the impeller pump is located in the water treatment chamber. Furthermore, provision can be made for means being provided at the top of the impeller pump or around the aforementioned inlet to fix and seal this fixture to the water treatment space. Therefore, it is possible that the pump with a top or the top of the pump chamber is attached to the bottom of the water treatment chamber or even directly to the bottom of a tank in the water treatment chamber. A distance may alternatively be 1 cm or less.

[0011] A direct fixing allows the maximum integration mentioned above or the minimum total height of the arrangement of the water treatment chamber and the impeller pump. In addition, intermediate parts between the water treatment chamber and the impeller pump can be dispensed with, so that both design effort and mounting costs are reduced. For this purpose, the impeller pump may, for example, have a tubular inlet projecting upwardly over the top of the pump chamber, as described above. It can only be the length mentioned above. Therefore, this inlet can be inserted directly into a corresponding opening in the lower part of the water treatment chamber, advantageously sealed by special sealing means, in particular elastic sealing means. This allows, so to speak, an insertion of the impeller pump with its inlet from below into a corresponding outlet opening or drain opening of the water treatment chamber.

[0012] Also, an outlet is provided in the impeller pump, through which the water is conveyed out of the pump chamber. This outlet can advantageously extend in a direction substantially perpendicular to the axis of rotation. Since this direction is substantially parallel to the bottom of the water treatment chamber, the height of the water treatment chamber of the functional unit and the impeller pump is further reduced.

[0013] According to the invention, an outlet from the pump chamber is provided in the lower area of the pump or in the lower area of the pump chamber. It can be arranged, for example, at the axial height of the drive motor. Preferably, the outlet is at the axial height of the lower third of the drive motor. Particularly preferably, the outlet is located in the lowest area of the pump or forms the lowest area or the lowest part of the pump.

[0014] Advantageously, the water treatment chamber forms or consists of a separate unit. The same can be applied to the pump. If the impeller pump is connected directly and without intermediate parts to the water treatment space or its drain or to a lower cavity of the tank, it is advantageous to provide only the aforementioned sealing means which, however, do not adversely affect the size or at full height.

[0015] Advantageously, the water treatment chamber has a drain at its lowest point or in a lower cavity. On the one hand, this lowest point may be relatively in the center of a total cross section of the water treatment chamber. Alternatively, it can be moved to one side to allow more convenient positioning of the impeller pump at the bottom of the drain in the appliance. In the lowest area of the water treatment chamber, a cavity with a few cm of height, for example 0.5 cm to 3 cm, can be provided. This is sufficient for collecting water and for simple and complete extraction.

[0016] For a compact construction of the water treatment chamber and the impeller pump, it can be provided that an upper area of the impeller is arranged at the height of the bottom or that the drain of the water treatment chamber it is arranged on the lower part of a tank or of a lower cavity of the water treatment chamber. You can also go just below it, for example, up to a maximum of 2 cm to this bottom.

[0017] In an advantageous embodiment of the invention a heating element or a heating device is provided in the pump chamber, as known from DE 102011003464 A1. Fixation to an external part or an external area of the pump chamber has been demonstrated here. Advantageously, the heating device or the heating element is located approximately at the axial height of the impeller, in particular at the axial height of an impeller outlet. Here the velocity of the current is the maximum and therefore the heat loss for possible rapid heating through the pumped water is also the maximum.

[0018] In another advantageous embodiment of the invention the drive motor can be integrated into the pump or into the pump chamber inwards, according to the invention it is surrounded at the same axial height of the pump chamber. In this case it can be advantageously a so-called wet rotor, in which in particular the water can flow. The structure of the impeller pump can be so that the drive motor is approximately at the axial height of an outlet from the pump chamber. Therefore, the pump case together with the complete pump should not be unnecessarily large or tall for a low overall head. Rather, it can be constructed in width so that its width or a diameter of the pump chamber is greater than the height of the pump or pump chamber. This can be 10% to 100% higher, eventually even more.

[0019] These and other features will become apparent from the claims, from the description and also from the drawings, where the individual features can be implemented respectively individually or in combination in the form of sub-combinations in one embodiment of the invention. and in other fields, and may represent advantageous and protectable embodiments, for which protection is claimed herein. The subdivision of the application into intermediate titles and individual sections does not limit the general validity of the statements made below.

Brief description of the drawings

[0020] Embodiment examples of the invention are schematically represented in the drawings and are explained in more detail below. The drawings illustrate:

Figure 1

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

Figure 2

an enlarged section of a cavity that forms a tank of the dishwasher of figure 1 with its pump, Figure 3

a sectioned representation by the arrangement of figure 2,

Figure 4

an oblique top view of the arrangement of figure 2,

Figure 5

a variant of the representation of figure 2 with no gap between the bottom of the cavity and the pump and Figure 6

a section through the arrangement of Figure 5.

Detailed description of the embodiment examples

[0021] In FIG. 1, a dishwasher 11 is represented schematically as an electrical appliance according to the invention with a box 12 and a washing compartment 14 as a water treatment space, which is mainly configured as it is commonly known. At the top of the washing compartment 14, a conventional washing arm 16 is indicated, where even more washing arms can be provided, particularly also in the lower area. At the bottom of the washing compartment 14 it has a bottom 17, which is incorporated by the central part into a large cavity 18, which is funnel-shaped and forms a tank 19 with a previously mentioned drain. In this way, cavity 18 can also be partially covered, for example, through grids, filters or the like. The walls of the washing space 14, as well as the bottoms 17, are usually made of metal or stainless steel. In turn, cavity 18 can be made of plastic, or alternatively also of metal.

[0022] In the lower part of the cavity 18, as can be clearly seen in figure 2 in increase, an impeller pump or pump 22 is arranged, where there is a slit 21 between the pump 22 or its upper part and the part bottom of cavity 18. This slit 21 may be a few millimeters, for example 0.5 cm. A connection of the pump 22 advantageously presents in the cavity 18 a seal 36 shown in FIG. 3. This is provided in particular between the lower part of the cavity 18 and an inlet 24. A fixing between both parts of the cavity 18 and the Pump 22 can be advantageously done in other ways.

[0023] According to figure 2, pump 22 presents a pump box 23 with inlet 24 and outlet 25 of a chamber of pump 26 that can be clearly seen in sectioned manner in figure 3. Through slit 21 Inlet 24 can be seen in the side view, which is advantageously a short tube fitting. According to FIG. 1, a water conduit 38, shown in broken lines, runs from the outlet 25, which finally also reaches the washing arm 16. In the middle, the water conduit 38 can be formed as in the state of the art, therefore, it features valves, bifurcations, drains, and even more.

[0024] From the sectional representation in FIG. 3, it can be clearly seen that the chamber of the pump 26 has, as a larger area of the outer circular wall, an annular circular heating element 27, which is represented here only in in a very simplified way, but for example the initially mentioned state of the art is known from DE 102011003464 A1.

The heating element 27 may be made of metal and exhibit surface heating through surface applied heating means, in particular through externally applied thick layer heating resistors in tracks. The upper part of the pump chamber 26 as well as a lower area of the pump box 23 are advantageously formed of plastic.

[0025] Impeller 28 is rotated in pump chamber 26, whereby pump 22 is simply an impeller pump. Impeller 28 has a curved top guard plate 29a and a substantially flat bottom guard plate 29b. It can be seen that the impeller 28, with its uppermost area, that is, the upper end of the upper protection plate 29a, reaches the level of the lower part of the cavity 28, where the extended protection disk 29a is configured here. upward tubularly.

[0026] Impeller 28 has a rotatable shaft 30 shown discontinuously and sits on a rotary shaft 31. In turn, it is firmly connected to or seated on rotor 33. The rotor 33, as well as an externally applied stator 34, belongs to a drive motor 32 for the pump 22. It can be seen in Figures 1 to 3 that the rotary axis 30 of the impeller 28 extends essentially perpendicularly or rectangularly in a dishwasher support surface 11.

[0027] Although the exact configuration of pump 22 may be as shown here, it is not necessary. In particular, the configuration of the pump chamber 26, with the wide upper zone and the narrow annular lower zone, may also be different. Furthermore, the drive motor 32 must not be dragged into the pump 22 or the pump chamber 26 in such a way. The drive motor 32 is formed here as a wet rotor, but can also be formed as a dry rotor, as is known from the previously cited state of the art.

[0028] In the oblique top view of figure 4 it is again clearly seen that the tank 19 or the cavity 18 are arranged as the lower area of the washing space 14, near the pump 22 or the pump chamber 26 , with the impeller 28, which can be seen in the oblique top view along with the input 24.

[0029] A variant of the invention is shown in Figures 5 and 6 corresponding to Figures 2 and 3. Here a cavity 118 is formed in turn with a cone-shaped funnel or cone shape and forms a reservoir 119 as lower part of a washing space not shown here, corresponding to figure 1. However, cavity 118 could be mounted directly in the dishwasher 11 of that of figure 1 instead of there in the cavity shown 18.

[0030] A pump 122 is mounted at the bottom of cavity 118, but this time directly and without the slit. This can be seen particularly well in Figure 6. Pump 122 is similarly formed as shown in Figure 3 as an impeller pump and has a pump case 123 with inlet 124 and outlet 125. Inlet 124 is essentially formed here. by an opening above the impeller 128. A tubular configuration according to Figure 3 is not provided here, but is also not required due to direct attachment of pump 122 to the bottom of cavity 118.

[0031] Impeller 128 has an upper guard plate 129a and a lower guard plate 129b. The upper area of the impeller 128 or the upper protection plate 129a are in turn approximately at the height of the bottom of the cavity 118. In addition, the impeller 128 is arranged with a rotary axis shown discontinuously 130 on a rotary axis 131 together with the drive motor 132. The drive motor 132 has a rotor 33 and a stator 34. In turn, the rotary axis 130 extends perpendicularly or at the right angle on a bearing surface of the apparatus, where it must set up the layout.

[0032] According to FIG. 6, a seal 136 is provided externally between the cavity 118 or its lower part or its lower part and the pump box 123 or the upper edge of the pump box or heating element 127. For temperature reasons, a silicone seal is advantageously provided here.

[0033] The comparison of Figures 3 and 6 makes clear that in Figure 6 integration is even stronger with that, since cavity 118 and pump 122 can actually be formed as a single structural unit. This enables common fabrication and assembly for the greatest possible integration, as well as for an easier sealing configuration.

[0034] Above all, it can be seen in the figures that separate components such as tubes, hoses or the like are not necessary between the washing compartment 14 or the cavity 18 or 118 or the tank 19 or 119 and the pump 22 or 122. As shown You mentioned, this reduces the build size and allows for more integration, a lighter sealing configuration, and a simpler structure.

Claims (13)

1. Water-conducting appliance with a water treatment chamber and with a water conduit from and / or to the water treatment chamber (14), in particular a dishwasher (11) or washing machine, where the appliance has a water pump impeller (22,122) in the water line and where the impeller pump has a pump chamber (26,126), an impeller (28,128) with a rotating shaft (30,130) in the pump chamber as well as a drive motor ( 32,132) for the impeller, where the rotary axis extends vertically or perpendicularly towards a base surface of the appliance, where an inlet (24,124) is provided in the pump chamber (26,126), which ends directly at a lower part (17) or in a drain (18,118) of the water treatment chamber (14), characterized by the fact that - an outlet (25,125) of the pump chamber (26,126) is provided in the lower area of the pump (22,122), - the drive motor (32132) is at the axial height and is surrounded by the chamber of the bomb. 2. Electric household appliance according to claim 1, characterized in that the inlet (24,124) surrounds the rotary axis (30,130), where preferably the rotary axis is centrally arranged in the inlet. 3. Electric household appliance according to claim 2, characterized in that the inlet (24,124) is tube-shaped and has a length of 0.5 cm to 5 cm. Electric household appliance according to any of the preceding claims, characterized in that a top edge of the pump chamber (26,126) is located a maximum of 3 cm to 15 cm below the water treatment chamber (14) in front of the bottom (17) or the drain (18,118) or in front of the maximum cross section of the water treatment chamber. Electric household appliance according to any of the preceding claims, characterized in that the impeller pump (22,122) is in direct contact with an upper part of the pump chamber (26,126) on a lower part (17) of the chamber treatment plant (14) or at the bottom of a tank (19,119) of the water treatment chamber or is arranged with a distance of less than 1 cm. Electric household appliance according to any of the preceding claims, characterized in that an outlet (25,125) of the pump chamber (26,126) extends in an essentially rectangular direction to the rotary axis (30,130). 7. Electric household appliance according to any of the preceding claims, characterized in that the outlet (25,125) is provided as the lowest area or lowest part of the pump (22,122). Electric household appliance according to claim 1 or 7, characterized in that the outlet (25,125) is arranged on the axial height of the drive motor (32,132), in particular on the axial height of the lower third of the drive motor. 9. Electric household appliance according to any of the preceding claims, characterized in that the water treatment chamber (14) consists of a construction unit and the impeller pump (22,122) also consists of a construction unit, where the impeller pump It connects directly and without intermediate parts in the water treatment chamber (14) or the drain (18,118), preferably only with elastic sealants. Electric household appliance according to any of the preceding claims, characterized in that a drain (18,118) of the water treatment chamber (14) is provided at its lowest point, preferably within a cavity with a height of 0, 5 cm to 3 cm. 11. Electric household appliance according to any of the preceding claims, characterized in that an upper area of the impeller (28,128) is arranged at the height of the lower part (17) of the water treatment chamber (14) or on the part bottom of a reservoir (19,119) of the water treatment chamber (14) or just below, preferably to a maximum of 2 cm. 12. Electric household appliance according to any of the preceding claims, characterized in that a heating element (27,127) is provided in or next to the pump chamber (26,126), in particular in an external part of the pump chamber ( 26,126) and approximately at the axial height of the impeller (28,128). 13. Electric household appliance according to any of the preceding claims, characterized in that the water in the pump chamber (26,126) flows around the drive motor (32,132).