EP2441370A2 - Dishwasher with at least one spray device - Google Patents

Abstract

The dishwasher has a rinsing container provided with a rinsing basket (4) that contains material to be cleaned. A front spray arm (5) is arranged toward a front side (V) of the rinsing basket in a displaced position. A rear spray arm (6) is designed as an auxiliary spraying system with outlets for water and/or washing liquor (S). The spray arms are supplied by a common intake pipe extending below the rinsing basket with a component toward the front side. The intake pipe includes a deep location (11) above inlets (12, 13) toward the front spray arm or the rear spray arm.

Description

The invention relates to a dishwasher, in particular domestic dishwasher, with a rinsing container which has an at least substantially rectangular floor plan with a front side facing toward a user in the operating position and which is provided with at least one washing basket in which goods to be cleaned can be held, at least one The spraying device associated with the respective washing basket can be acted upon with water and / or so-called rinsing liquor, in particular according to the preamble of claim 1.

Numerous dishwashers are known, which have a rinsing container with a substantially square outline, for example, when the dishwasher in plan view both in the width and in the depth direction has an extension of about 60 centimeters.

Lately narrower devices often come on the market compared to the above-mentioned dishwashers, for example, retain the said depth, but have a width of typically 45 or 50 centimeters. Such devices take into account, for example, the increasing number of single households or are sometimes used in the camping area or often in very small kitchens. The overall floor plan of the dishwasher as well as the actual rinsing container for receiving to be cleaned Good is substantially rectangular. In dishwashers with a square floor plan, this floor plan can be acted upon evenly by water and / or detergent, circulating water, so-called rinsing liquor, by a spray arm rotatable about a vertical central axis in the width and depth direction, so that the spray arm moves during its rotary motion equidistant to the front and rear edges as well as to the two side edges of the rectangle present in the special shape of the square.

However, if the rectangle has different edge lengths, a centrally mounted spray arm can only have a length that is smaller than the shortest edge length. In a narrowed in the above-mentioned device, this means that a centrally mounted spray arm in its rotation, although up to the side walls can perform an action, however, remains clearly removed from a front wall or door as well as from a rear wall, so there remain unbeaten areas. This not only leads to a reduced wetting there of the material to be cleaned, but also makes it problematic, cleaning agent, in particular in solid state, which is held on a front edge of a washing basket or a front wall or a frequently used front door, from a beam of the To be able to detect the spray arm in order to introduce it into the rinsing liquor. Dishwashers are known in the prior art, which have a plurality of spray arms in a plane, such as in the DE 101 62 505 A1 is shown. Again, however, a total square area is processed by dividing this area into four similar quadrants and assigning a spray arm to each quadrant. An improvement for a rectangular area with different edge lengths is not achieved. In addition, such an arrangement is very complex and expensive due to the many pipes and leaves just in the mid-range area of a front, where could be about to be acted tab collection tray, a not swept area, It also results in consuming leads, in which much dead volume remains so that the water requirement of such a dishwasher is comparatively high.

The invention is based on the problem even with such rinse containers with different width and depth extension to provide effective cleaning across the surface by at least one spraying device and still allow effective drainage of the water supply.

The invention solves this problem by a dishwasher with the features of claim 1. Further advantages and features and further developments of the invention are specified in claims 2 to 13.

The invention provides a dishwasher, in particular a domestic dishwasher, in which on the one hand a first spraying device offset towards the front can be cleaned up to the front edge region of the washing basket and, moreover, in that a further spraying device is provided with one or more further outlet openings for water and / or rinsing liquor, which is offset from the first spraying device to the rear, also takes place in the rear area an improvement of the cleaning. At the same time, however, the dead volume - and thus the water consumption - remains very low, by both sprayers are supplied by a common, below the wash basket with a component towards the front extended inlet pipe, the lowest point above an inlet to the front or in the rear Sprayer has. As a result, only a single line to both sprayers is necessary, they must not be supplied in each case via their own pipelines. Due to the location of the lowest point, the line can drain at least almost completely, with the water can run directly into the underlying sprayer. A good drainage of the line has a reduced carryover of Spülflottenflüssigkeit in the next wash cycle of a subsequently started dishwashing program with low polluted water result.

In particular, if the lowest point above the inlet is located in the rear spray, the slope may be divided into two opposing sections, so that the lowest point requires little height and the space below the inlet pipe and the spray remains almost unimpaired. This is especially favorable if, under the said device, a further washing basket is provided, the filling height of which is to be maintained as far as possible.

If the deepest point forms a bend in the course of the inlet pipe, in the production by injection molding there can easily also two - each only short - form cores abut, which can then be easily removed from the mold in opposite directions.

In particular, the inlet pipe can be composed of several parts over its axial course. Its production by injection molding is facilitated. The individual parts are comparatively short, so that the demolding is not a problem.

The inlet pipe can thus be made inexpensively by injection molding of plastic, in particular polypropylene.

Advantageously, the inlet pipe can be attached to a washing basket, in particular the upper basket, the dishwasher and be movable with this. Thus, the inlet pipe can for example follow a Höhenverlagerbarkeit the Spülkorbs forcibly, without requiring this own movement effort. For example, the space for items to be washed in an upper basket can be maximized by moving this rinse basket to its lowest position. By contrast, if the wash basket is held in its highest position, the space for items to be washed is maximized in an underlying wash basket. By entraining the inlet pipe with the associated crockery basket, in particular upper basket, in the height direction, the distance to the washing basket - and thus the effectiveness of the loading - always the same.

A common connecting piece for the supply of the inlet pipe with the spraying from a leading to the inlet pipe and the rear wall of the washing tub associated supply line can be kept in particular forcibly with höhenverlagerbar to the supply line to allow the vertical displacement. An extract to the front in a loading and unloading is possible with such a connector. In addition, the common connector ensures a reliable and similar supply both sprayers, the design effort is minimized.

For a narrow installation position, the washing container in particular a rectangular base with an enlarged relative to its transverse extension longitudinal extent in the depth direction, wherein at least the front spray arm can be suitably dimensioned so that it almost completely as in a square base in its rotational movement with the spray the transverse extent sweeps.

Such a device with additional spray system can be particularly favorable for the application of a collecting basket for cleaning an upper of at least two Spülkörben assigned, but is also additionally or alternatively usable for a lower basket.

If the rear auxiliary spray system is completely behind the range of motion of the front sprayer, collision is ruled out. There is no offset must be provided in several levels one above the other, so that no height restriction arises for the loading space in the washing. The rear sprayer may also form another spray arm which is rotatable behind the front spray arm.

Due to the eccentric arrangement of the spray arm and its offset relative to a central bearing offset along the transverse center of the washing container, a receiving container for cleaning agents arranged at the front end of the washing basket or in the door, in particular for solid-state cleaning agents, such as e.g. in the form of multiphase tabs, directly and effectively acted upon by a jet of water and / or rinsing liquor emerging from the spray arm, since through this arrangement the application in the middle extends furthest to the front.

The above-explained and / or the other advantageous embodiments and / or developments of the invention, which are set forth in the subclaims, can thereby - except e.g. in the case of clear dependencies or incompatible alternatives - individually or in any combination with each other.

Further advantages and features of the invention and / or their advantageous embodiments and further developments will become apparent from the drawings and described below embodiments of the subject invention.

Fig. 1

eine Geschirrspülmaschine in schematischer Seitenansicht mit der besseren Übersicht halber durchsichtig dargestellter Seitenwandung und nur einem eingezeichneten Spülkorb, wobei dem oberen Spülkorb zwei Sprüheinrichtungen zugeordnet sind, von denen die zur Vorderseite hin gelegene in ihrer vollen Länge (in Tiefenrichtung Y) dargestellt ist,

Fig. 2

den Spülbehälter aus Figur 1 in perspektivischer Ansicht von schräg seitlich und vorne, wobei wiederum nur ein oberer Spülkorb eingezeichnet ist, hier jedoch sowohl ein vorderer als auch ein hinterer Sprüharm dargestellt sind,

Fig. 3

ein beispielhaftes Einlaufrohr mit zwei davon versorgbaren Sprüharmen hintereinander in herausgezeichneter Einzelteildarstellung und mit einem rückseitigen Anschlußende zur Verbindung mit einem vertikalen Zuführrohr,

Fig. 4

eine schematische Draufsicht auf den oberen Spülkorb und eine vordere und eine hintere Sprüheinrichtung nach Figur 3 in Betriebsstellung mit den von den Sprüheinrichtungen bewirkten Sprühbildern,

Fig. 5

das Einlaufrohr nach Figur 3 in seitlicher Ansicht ohne die anmontierten Sprüharme, und

Fig. 6

eine schematische Draufsicht auf einen in Betriebsstellung vorderen und einen in Betriebsstellung hinteren Teil des Einlaufrohrs vor ihrer Montage aneinander.

In the drawing, each schematically show:

Fig. 1

a dishwasher in a schematic side view with the better clarity half transparent side wall and only one drawn rinse, wherein the upper rinsing two spraying devices are assigned, of which the front towards its full length (in the direction of depth Y) is shown

Fig. 2

the rinse tank off FIG. 1 in a perspective view obliquely from the side and front, again only an upper washing basket is shown, but here both a front and a rear spray arm are shown,

Fig. 3

an exemplary inlet pipe with two spray arms which can be supplied one after the other in a drawn-out part view and with a rear connection end for connection to a vertical feed pipe,

Fig. 4

a schematic plan view of the upper Spülkorb and a front and a rear spray after FIG. 3 in operating position with the spraying images caused by the spraying devices,

Fig. 5

the inlet pipe after FIG. 3 in lateral view without the mounted spray arms, and

Fig. 6

a schematic plan view of an operating position in the front and an operating position in the rear part of the inlet pipe before their assembly to each other.

Elements with the same function and mode of operation are each provided with the same reference numerals in the figures.

In the FIG. 1 Dishwasher shown 1 is a domestic dishwasher and has a washing container 2 for receiving ware to be processed dishes, pots, cutlery, glasses, cooking utensils and. on. The rinsing container 2 may have an at least substantially rectangular floor plan with a front side V facing a user in the operating position. The rectangle can have both identical edge lengths and, in particular, different edge lengths in the x and y directions, in particular in such a way that the rinse container 2 is narrowed in its width X with respect to its depth extent Y.

The container 2 is in particular on its front side V of a door 3 - also an upper-side lid is possible as a door 3 - closed. The door 3 is in FIG. 1 shown only aborted and, for example, a lower horizontal axis 3a pivoted open. The items to be washed can be held in at least one washing basket 4; Here are exactly two baskets 4 are provided one above the other in the washing container 2, of which the sake of clarity, however, in the drawing, only the upper one is shown. The number of washing baskets 4 may vary depending on the extent and type of the dishwasher 1. Also a so-called cutlery drawer may be additionally provided. These baskets 4 are about sprayers 5, 6 with fresh water FW and / or with circulating water, with detergent, rinse aid, dirt particles, and / or other additives such. As salts, softeners, etc .. is added, so-called. Flushing S, each acted upon an upward component. These spraying devices 5, 6 are described in more detail below.

Furthermore, the washing baskets 4 can be displaced, for example, on rollers forward, so as to achieve an access position for the user, in which he can easily load and unload the washing baskets 4. As webs for the rollers lateral rails are provided in the washing compartment 2. Furthermore, 4 pull and push handles can be provided to simplify the insertion and removal of the washing baskets 4 at the respective front edge levels of Spülkörbe. In the vertical closed position of the door 3 is the or each dish rack 4 in an operating position in the vicinity of one of the closed door 3 opposite rear wall 7 of the washing container. 2

In the shifted to the front V access position of the at least one crockery basket 4, the drawn door 3 is pivoted down at the front about a horizontal transverse axis 3a and is substantially horizontal, so that the crockery 4 then each above the plane of extension of the open door 3 and for a user can be easily accessible.

According to the illustrated embodiment, two or more spraying devices 5, 6 are assigned in at least almost the same horizontal plane underneath the washing basket 4 to the upper washing basket 4, which is only drawn here. In this case, the first spray device 5 comprises a spray arm rotatable about a vertical axis of rotation 8, the axis of rotation 8 of which is offset relative to a centric arrangement towards the front side V. However, this spraying device 5 is still located in the transverse center plane Q. In addition, at least one further spraying device 6 is provided as an additional spraying system, which is opposite the first spraying device 5 away from the front side V. is offset to the rear in the direction of the rear wall 7. According to the in FIG. 3 indicated training, the rear spray 6 comprises a further, about a vertical axis 9 rotatable spray arm, which is not mandatory. Also, for example, two side nozzles, which can laterally reach out from a T-shaped branch and spray upward, are possible. Likewise, other rear sprayers are possible. Both the front 5 and the rear spray 6 are supplied from a common, below the wash basket with a component towards the front V extended inlet pipe 10, the lowest point 11 above an inlet 12, 13 in the front 5 or in the rear Sprayer 6 has. According to the drawing, as already pointed out above in terms of its advantages, the lowest point 11 of the inlet pipe 10 is located above an inlet 13 for the rear Zusatzsprühsystem 6.

This lowest point 11 forms a slight bend in the pipe run of the inlet pipe 10. This is favorable for manufacturing by injection molding, since at the kink point 11 two mandrels can butt against each other, which can be removed from each other in opposite directions (directions e2, e3).

In particular, thus the multi-part design of the inlet pipe is used for a simplified production by injection molding. Here are the two axially consecutive parts 14, 15 (FIG. FIG. 6 ) of the inlet pipe 10 are both formed as injection-molded parts, which are independent of each other and each have a manufacturing technology low in each case only a small length.

In FIG. 6 are the individual parts 14, 15 with their mandrels F1 on the one hand and F2 and F3 on the other hand (separated at the break 11) drawn schematically. The Entformungsrichtungen e1 and the mutually opposite Entformungsrichtungen e2 and e3 for the cores F2 and F3 are also shown.

The inlet pipe 10 as well as the feed tube 16, which is essentially vertical to the latter and described in more detail below, can be made, for example, of plastic, in particular polypropylene, optionally with a mineral reinforcement to improve stability and resistance to chemical reactions

After the production of the items 14, 15, these are positively connected with each other and thereby secured against each other both axially secured against rotation, so that the in FIG. 5 drawn composite inlet pipe 10 results. The assembly of the parts 14, 15 can be done manually and without tools. For this purpose, a sleeve 23 is formed integrally with the front part 14 integrally.

The inlet pipe 10 thus formed can be attached to a washing basket, in particular an upper washing basket, and be movable therewith. Especially with an upper washing basket 4, this is particularly useful, since this can thus be höhenverlagerbar together with the inlet pipe and so can be created for bulky items in the lower basket or for high items in the upper basket space.

In order to enable this mobility of the inlet pipe 10 with the washing basket 4 with respect to a fixed, upstanding supply line 16, a höhenverlagerbares fitting 17 - for example via sliders - provided for the supply of the inlet pipe from the supply line 16. The inlet pipe 16 itself is assigned to a rear region of the washing container 2 facing away from the front V and either, as in FIG FIG. 2 drawn, located in the washing container 2 or behind the rear wall. 7

Here are fed by the inlet pipe 10 via the inlets 12, 13 two sprayers 5, 6 with fresh water FW and / or rinsing S, wherein according to the Figures 2 and 3 both sprayers 5, 6 each comprise a rotatable spray arm.

If, as described above, the rinsing container 2 has a base surface with an enlarged relative to its transverse extension X depth extent Y, both sprayers in the transverse center Q can be behind each other, without touching each other. In this case, the large depth of the respective washing basket 4 to be acted upon can be processed uniformly by the sprayers, so that their swept surfaces 18, 19 as in FIG. 4 represent as equal to each other large areas. As a result of the fact that the outer nozzles 21 of the spraying devices 5, 6 each spray radially outward for some distance, the working areas of the spraying arms are larger than the surfaces 18, 19 swept by them and may also overlap.

Here, both spray arms 5, 6 have the same diameter, which is not mandatory. At least the spray arm 5 displaced to the front V can almost completely sweep across the transverse extent (width direction of the interior of the washing container from the front, i.e. frontally with respect to its feed opening) X of the washing basket 4 in its rotational movement.

Conveniently, the front spraying device 5 is arranged in a position offset in the direction of the front side V such that a front or door 3 facing the end of the washing basket 4 or in the door 3 in the region 20 arranged receiving or collecting container for cleaning agents, in particular for in Solids present in the solid state form, can be acted upon by a jet of water FW and / or washing liquor S emerging from the spray arm 5. Here, a drip tray made of, for example, wire mesh or perforated plastic is provided at the top of the washing basket 4, in which the tab is inserted or falls from a container on the inside of the door 3 after its closing. This receptacle can then be acted upon directly upon rotation of the front spray device 5 via a radially outer nozzle 21. A tab located there or the like can be solved so well and introduced into the rinse S. This direct loading and the associated rinsing out of the receiving container can be effected, for example, by a beam issuing vertically upwards from the radially outer end of the front spray arm 5, since it is sufficiently long that it extends in its rotation to just below the collecting container.

Both sprayers 5, 6 are arranged together in the same plane and thereby act on the washing basket 4, to which they are assigned, evenly. To achieve this, the inlet pipe 10 is attached together with the fitting 17 via, for example hooks 22 or other mechanical connection to the upper dish rack 4 and movable with this. Thus, the inlet pipe 10 can be adjusted in height with the upper washing basket 4 relative to the feed tube 16, for example, in several stages of 1.5 to 3.5 centimeters. Here are between the lowest position, in which the upper Spülkorb 4 can be loaded well, for example, with tall glasses, and its highest position, in the lower Spülkorb considerable space for bulky Good is created, two stages of, for example, 2.5 centimeters Height can be added to a Gesamtverstellweg of eg five centimeters. This is the edgewise extended connector 17 laterally provided with slide valves for movement relative to the feed tube 16. Such a height adjustment is shown here only for the upper wash basket 4, since it is particularly useful there. The lower washing basket 4 always remains here in its lowest position.

In addition, the inlet pipe 10 with the upper washing basket 4 relative to the feed pipe 16 in the direction of the front V is displaced, so that it can be forcibly pulled with the door open 3 with the wash basket 4 with forward.

As described above, here is the inlet pipe 10 with the supplied by this spray 5, 6 in height extension Z of the washing considered substantially in a plane below the washing basket 4, to which it is associated. In this case, the at least two of the inlet pipe 10 fed spray 5, 6 further considered in height extension Z offset down, in a, preferably approximately common, level below the inlet pipe 10. Thus, the top of the inlet pipe 10 directly with hooks 22 or the like Be provided connecting means for attachment to the wash basket 4. Thus, the spraying devices 5, 6 are forcibly vertically displaceable together with the washing basket 4, so that in each height position, the impingement is ensured with constant effectiveness. If several crockery baskets 4 are provided one above the other, it is advantageous, in particular for the upper crockery basket 4, to have such an arrangement of spraying devices 5, 6, in order thus to enable the vertical displacement of this cistern 4 and the flushing out of a front tab cradle.

It is particularly favorable to provide the lowest point 11 above an inlet 13 for the rear sprayer 6, since then less water is in the tubes, so that a lower carryover of the wash liquor in the next wash a subsequent, i.e.. later started dishwashing program, takes place with little polluted water. The inlet pipe 10 can drain almost completely via its outlet at the lowest point 11 and the inlet 13 in the rear spray 6.

In addition, with the present arrangement, the height structure is very low. With the Zweifachsprühsystem 5, 6 and a rectangular area with different edge lengths well into the corners is well covered.

LIST OF REFERENCE NUMBERS

1

Dishwasher,

2

rinse tank,

3

Door,

3a

Pivot axis

4

wash rack,

5

spraying,

6

spraying,

7

Rear wall,

8th

Axis of rotation

9

Axis of rotation

10

Inlet pipe,

11

lowest point,

12

Inlet into the front sprayer,

13

Inlet into the rear sprayer,

14

axial front part,

15

axial rear part,

16

feed,

17

Connector,

18

swept area,

19

swept area,

20

Area of the tab drip tray,

21

outer nozzle,

22

Hook,

23

Sleeve,

S

rinsing,

V

front

FW

Fresh water,

AW

Sewage,

X

Width extension,

Y

Depth extent,

Z

height extension

F1

Mold core length

F2

Mold core length

F3

Mold core length

e1

unmolding,

e2

unmolding,

e3

unmolding

Claims (13)

Dishwasher (1), in particular domestic dishwasher, with a rinsing container (2) which has an at least substantially rectangular floor plan with a front side (V) facing a user in the operating position and which is provided with at least one washing basket (4) in which to be cleaned Can be kept well, which can be acted upon by at least one spraying device (5; 6) assigned to the respective washing basket (4) with water (FW) and / or so-called washing liquor (S),
characterized,
in that at least one spraying device (5) is arranged in a position offset in the direction of the front side (V) and a further spraying device (6) is provided as an additional spraying system with one or more further outlet openings for water (FW) and / or rinsing liquor (S) relative to the first spraying device (5) away from the front (V), both spraying devices (5; 6) extending from a common inlet pipe (3) extending below the washing basket (4) with a component towards the front (V). 10) having a lowest point (11) above an inlet (12; 13) in the front (5) or in the rear spray (6). Dishwasher (1) according to claim 1,
characterized,
that the lowest point (11) above the inlet (13) in the rear spray (6) is located. Dishwasher (1) according to one of claims 1 or 2,
characterized,
that the lowest point (11) forms a bend in the course of the inlet pipe (10). Dishwasher (1) according to one of the preceding claims,
characterized,
that the inlet pipe is composed of several parts (14, 15) over its axial course. Dishwasher (1) according to one of the preceding claims,
characterized,
that the inlet pipe (10) is made by injection molding of plastic. Dishwasher (1) according to one of the preceding claims,
characterized,
that the inlet pipe (10) is attached to a washing basket (4) and is movable therewith. Dishwasher (1) according to one of the preceding claims,
characterized,
that a common connecting piece (17) for the supply of the infeed tube (10) with the sprayers (5; 6) leading from one to the inflow pipe (10) and the rear wall (7) of the washing compartment (2) associated with the supply line (16) is provided. Dishwasher (1) according to claim 7,
characterized,
that the connecting piece (17) is vertically displaceable. Dishwasher (1) according to one of the preceding claims,
characterized,
in that the rinsing container (2) has a rectangular base surface with a depth extension (y) which is larger than its transverse extension (x). Dishwasher (1) according to claim 9,
characterized,
in that the spraying device (5) displaced towards the front almost completely covers the transverse extent (x) in its rotational movement with its spraying steels. Dishwasher (1) according to one of the preceding claims,
characterized,
that the two which can be supplied by a common inlet pipe spray means (5; 6) are associated with an upper wash rack (4). Dishwasher (1) according to one of the preceding claims,
characterized,
that both spray devices (5; 6) comprise in the same plane rotatable spray arms. Dishwasher (1) according to one of the preceding claims,
characterized,
in that the front spray device (5) is arranged in a position offset in the direction of the front side (V) such that an end of the washing basket (4) facing the front door (3) or cleaning agent receiving containers arranged in the door (3) , in particular for detergent present in solid form, can be acted upon by a jet of water (FW) and / or rinsing liquor (S) emerging from said spray device (5).

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