EP2368478A2 - Dishwasher - Google Patents

Abstract

The dishwasher has a washing container (1) for receiving objects to be cleaned and dried and a supply line (41) for guiding water into the washing container. A container opening is arranged below the operating filling level for executing the supply line through a wall of the washing container.

Description

The invention relates to a dishwasher, in particular a domestic dishwasher, at least one washing container for receiving items to be cleaned and / or to be dried and having a supply line for conducting water in the washing container, wherein the outlet end of the supply line is arranged above the Betriebsfüllniveaus the dishwasher ,

Dishwashers, in particular household dishwashers, have a rinsing container in which items to be cleaned can be stored in dish racks which can be pulled out of the rinsing container, wherein the rinsing container can be opened or closed by means of a door for loading and / or unloading the racks. To clean the items arranged in the dishwashing items, water can be passed into the washing container. For this purpose, a supply line is provided, whose end is guided through a passage opening in a side wall of the washing container of the dishwasher and can be passed through the water from a home-side supply system or a water tank of the dishwasher in the washing. In this case, the passage opening is arranged so that it is above a Betriebsfüllniveaus that results when the dishwasher with a for operation, d. H. for cleaning and / or drying of items to be washed, provided amount of water is filled. Although this arrangement reliably prevents contaminated water from passing through the passage opening into the supply line, this arrangement has a particularly long line length due to the lateral high guidance, which increases the water consumption due to the dead volume of the supply line.

It is therefore an object of the invention to provide a dishwasher with a reduced water consumption.

According to the invention, it is provided that a container opening for passing through the feed line through a wall of the washing container is arranged below an operating filling level of the dishwasher. By this arrangement, the supply line be significantly reduced in length, which reduces the dead volume, which is ensured by the arrangement of the container opening above the Betriebsfüllniveaus that sets when the dishwasher is filled with a required amount of water for the intended use, that there is no contamination of the supply comes.

It is preferably provided that a supply line for supplying a softening device for softening water with at least one regenerating agent, in particular regenerating salt, runs through the container opening. To reduce the water hardness of the water fed into the washing container, the water passes through the softening device of the dishwasher before it is filled. Such a softening device requires as a resource a regenerating agent, in particular a regenerating salt. To refill the regenerating salt, the supply line is provided, which extends through the wall of the washing compartment in the interior of the washing compartment, and by means of which the softening unit can be supplied with regenerating salt, if necessary. Since this opening is arranged in the interior of the washing container, an opening of the washing container is therefore required for refilling. By arranging the manufacturing cost is reduced, since it is only necessary to introduce a passage opening in the washing, to seal and finally to verify.

In a further embodiment it is provided that the retaining means are arranged on a cover which closes the end of the supply line. In this case, the lid is used to close the line, with the softening regenerating salt can be supplied if necessary and ensures during normal operation of the dishwasher that no liquid can pass through the feed undesirably in the softening device. The cover may have a threaded portion which cooperates with a corresponding portion in the washing container, with which the lid can be attached by a rotary movement and also released again. Alternatively, a bayonet catch can be provided.

Further, it is preferably provided that the supply line at least one retaining means for blocking a directed from the washing container Liquid flow is assigned. Thus, it is reliably prevented by the retaining means that there is no backflow in the supply line, with the water from the softening device can be passed into the washing compartment. This can be, for example, spray water that bounces off the items to be washed during operation of the dishwasher or, in the case of a blockage-related malfunction, a quantity of liquid collecting on the bottom of the washing container which penetrates into the open end of the second line inside the washing container.

It is further preferably provided that the retaining means are associated with the lid. This allows in the case of a defect of the retaining means this easy to replace with the lid.

In a preferred embodiment, the retaining means is designed as a check valve. In this case, the check valve is arranged such that it allows a liquid flow to pass into the washing, while blocking a flow of liquid out of the washing out.

In a further embodiment, it is provided that the retaining means have an outlet end of the second conduit formed as an overflow. Thus, it is ensured by simple means that there is no liquid flow from the washing compartment of the dishwasher in the case in which an undesirable amount of liquid collects in the bottom portion of the washing and reaches the height of the end of the second conduit for conducting water in the washing.

In order to protect at the same time the outlet opening of the supply line before entering spray water is preferably provided that the cover covers the overflow.

Furthermore, it is preferably provided that the retaining means are arranged at the end of the second conduit. This means that the retention means are located inside the washing container and thus ensures that no unwanted liquid residues remain in a liquid section. Furthermore, it is ensured in this case that the retaining means without the installation of the dishwasher can be achieved simply by opening the rinse tank to correct any malfunctions.

Furthermore, it is preferably provided that the supply line and the supply line at least in sections, in particular in the passage area in the washing, d. H. when passing through the Spülbehälterwandung, are arranged parallel to each other. This allows a particularly simple structure. In this case, the portion of the first conduit and the second conduit may extend from the softening device into the interior of the washing compartment.

Furthermore, it is preferably provided that the supply line and the supply line at least in sections, in particular in the passage area in the washing, d. H. when passing through the Spülbehälterwandung, are arranged concentrically to each other. This allows a particularly space-saving, compact design.

It is preferably provided that the supply line and the supply line at least in sections, in particular in the passage area in the washing, d. H. when passing through the Spülbehälterwandung, are arranged running in the direction of gravity. This ensures that regenerating salt can be fed to the softening device, in particular through the supply line for supplying the softening device by gravity, without the need for additional aids.

For this purpose, it is preferably provided that the container opening is arranged in the bottom of the washing compartment. However, the container opening may also be arranged in the region of a side wall of the washing container.

Furthermore, it is preferably provided that the softening device is arranged below the washing compartment. This also allows a particularly compact embodiment with low space requirement, which is ensured by the arrangement of the softening device and the rinsing container that the regenerating salt can reach the softening device automatically by gravity. Finally, it is preferably provided that the check valve has a displaceable blocking body, which closes the supply line due to gravity or is pressed into its closed position by means of a spring element. With this simple mechanical construction, a reliable function is achieved.

The blocking body can be displaceable in a connecting piece of the cover in the axial direction between a closed position and a release position. The connecting piece of the lid can connect the inlet fluidically with the washing compartment. For this purpose, the connecting channel of the lid sealingly protrude into the inlet.

The blocking body can be brought in a closed position with a sealing surface into contact with a corresponding sealing surface of the lid. As soon as water is introduced into the washing container, the blocking body is lifted by the inflowing water from its closed position into a release position, in which the water can run into the washing compartment through an annular gap formed between the blocking body and the lid.

The lifting movement of the locking body in the release position may be limited by a movement stop. The movement stop can engage behind the connection piece of the cover on the end facing away from the sealing surfaces of the blocking body. In this way, the locking body is held captive on the lid even when unscrewed from Regeneriermittelbehälter lid of the locking body.

Alternatively to the above-mentioned filling valve, the inlet can be connected with the interposition of a labyrinth seal with the washing compartment of the washing. By means of the labyrinth seal, as with the filling valve, clogging of the feed with impurities can be prevented.

In a technically simple embodiment, the labyrinth seal can be connected downstream of the inlet and be provided by way of example by a correspondingly adapted cover geometry. Thus, by way of example, the inlet can project without contact into a free space of the lid. The lid can have a free flow gap be spaced from the Spülbehälterboden through which the water from the lid-free space can flow into the washing compartment.

Hereinafter, an embodiment of the invention with reference to the accompanying figures will be described.

Fig. 1

in einer Prinzipdarstellung eine Geschirrspülmaschine;

Fig. 2

in einer vergrößerten Teilschnittansicht den erfindungsgemäßen Wasserzulauf in den Spülraum der Geschirrspülmaschine;

Fig. 3 und 4

einen Sperrkörper des Wasserzulaufes in seiner Schließstellung und in seiner Freigabestellung; und

Fig. 5

den Wasserzulauf gemäß einer Abwandlung.

Show it:

Fig. 1

in a schematic diagram of a dishwasher;

Fig. 2

in an enlarged partial sectional view of the inventive water inlet into the washing compartment of the dishwasher;

3 and 4

a blocking body of the water inlet in its closed position and in its release position; and

Fig. 5

the water inlet according to a modification.

It is going on first Fig. 1 Referenced.

In the Fig. 1 is shown as an exemplary embodiment of a dishwasher, a household dishwasher with a, a washing compartment delimiting washing container 1. In the washing compartment of the washing container 1, not to be cleaned, to be cleaned dishes in dish racks 3, 5 are arranged. In the washing container 1 shown, two spraying arms 7, 8 provided in different spraying levels are arranged by way of example, via which the washware to be cleaned is supplied with washing liquid.

In Spülbehälterboden 6 a pump pot 11 is provided with associated circulating pump 13, which is connected via feed lines 14, 15 fluidly connected to the spray arms 7, 8. The pump pot 11 is connected via a drain line 17 with therein provided drain pump 18 with a hausseitigem sewer system.

At the in the Fig. 1 shown left Spülbehälter sidewall is serving as a heat exchanger water storage 19 thermally with the environment of the dishwasher coupled. In the heat exchanger 21 water is supplied via a water supply line, which can be guided via a supply line 23 to a softening device 25 and further into the washing compartment. If the dishwasher is filled with the amount of water required for the intended use, ie for cleaning and / or drying of items to be washed, an operating level is reached (shown in dashed lines).

The softening device 25 is preceded by a switching valve 27, which is connected via a first connecting line 29 directly to the ion exchange container 31 of the softening device 25 and is connected to the regenerating agent tank 35 of the softening device 25 by a second connecting line 33. The regenerant tank 35 is connected via an intermediate line 37 to the ion exchange container 31, wherein in the intermediate line 37 a in the present embodiment designed as a check valve filling valve 39 is connected, which blocks a water return from the ion exchange container 31 in the Regeneriermittelbehälter35.

During a normal rinsing operation, the water from the water supply network via a filling valve 39 into the heat exchanger 19 and from there via the switching valve 27 and the first connecting line 29 is passed directly through the ion exchange container 31, in which the water is softened. Subsequently, the thus softened soft water flows through an overflow in a supply line 41 into the washing compartment. As soon as the softening capacity of the softening device 25 has been exhausted, a regeneration process takes place in which the water is first conducted via the switching valve 27 and the second connecting line 33 into the regenerant tank 35, which usually contains salt. The brine formed thereby is further passed via the intermediate conduit 37 into the ion exchange vessel 31 in which the ion exchange between the brine and the ion exchange material takes place. The regenerant container 27 can according to the Fig. 1 be filled on the user side with salt via a filler neck of the supply line 43. The filler neck is closed by means of a lid 45.

It is now additionally on Fig. 2 Referenced.

It opens the ion exchange container 31 fluidly downstream supply line 41 is not a separate Spülbehälteröffnung in the washing, but the feed line 41 is guided together with the supply line 43 through a common container opening 47 in the Spülbehälter-bottom 6 and terminates in an end portion, as substantially is formed vertically extending pipe section (in the operating position of the dishwasher, see. Fig. 2 ). Thus, the container opening 47 is located below and the exit end of the supply line 41 above the Betriebsfüllniveaus.

The supply line 41 is in accordance with the Fig. 2 directly guided by the Regeneriermittelbehälter 35 and coaxially to the supply line 43, wherein in the present embodiment, the end of the supply line 43 is formed as a filler neck.

In the Fig. 2 the area of the water inlet according to the invention is shown enlarged in the washing compartment. Accordingly, a threaded sleeve 49 is formed with an internal thread on the cover 45, which is screwed onto an external thread of the filler neck. Radially outside the threaded sleeve 49 of the lid 45 is surrounded by an annular wall 51. Radially within the threaded sleeve 49, a central connecting piece 53 is integrally formed, which projects into the upper end of the feed line 41.

In order to form the valve means, in the present exemplary embodiment, a mouth opening of the connection piece 53 facing the flushing space is surrounded by an annular stepped valve seat 55 on which a sealing disk 57 of a blocking body 59 is seated in a form-fitting and sealing manner. The locking body 59 is according to the Fig. 2 passed through the connecting piece 53 and has at its lower end latching lugs 61 with expanded diameter, which engage behind the connecting piece 53 with axial distance.

It is now additionally on Fig. 3 and 4 Referenced.

In the Fig. 3 and 4 the water supply according to the invention is shown in each case in its closed position and in its release position. Consequently, according to the Fig. 3 the locking body 59 with its sealing washer 57 on the valve seat 55. The valve seat 55 Here is a groove bottom of a circumferential around the mouth opening of the connecting piece 53 annular groove, on which groove bottom a correspondingly shaped annular web of the sealing washer 57 rests sealingly.

At one in the Fig. 4 illustrated water inlet into the washing 1, the locking body 59 is pushed in the flow direction upwards until the locking lugs 61 abut against the lower end face of the connecting piece 53. In this case, there is a free annular gap between the sealing disk 57 and the valve seat 55, through which the water can flow into the flushing chamber. The locking lugs 61 act in this case as a movement stop, which limits the lifting movement of the locking body 59 upwards.

It is now additionally on Fig. 5 Referenced.

In the Fig. 5 a modification of the water inlet according to the invention is shown. As a result, the supply pipe 41 is disposed radially outside the first pipe 43. The end of the supply line 41 is in accordance with Fig. 5 Covered by the lid 45, so that clogging of the end of the supply line 41 can be prevented with impurities. The end protrudes into an annular recess 63 of the lid 45 a. The annular recess 63 is bounded on the outside by the circumferential annular wall 51 in the radial direction and on the inside by the threaded sleeve 49 of the cover 45. According to the Fig. 5 is provided between the lower edge of the annular wall 51 and the Spülbehälterboden 6, a free flow gap 65 through which the water flowing into the annular space 63 is guided into the washing compartment.

LIST OF REFERENCE NUMBERS

1

rinse tank

3, 5

dish rack

6

Spülbehälterboden

7.8

spray arm

11

sump

13

circulating pump

14, 15

supply

17

drain line

18

Drain pump

19

water-tank

21

Water supply line

23

supply line

25

softener

27

switching valve

29

first connection line

31

lonenaustauschbehälter

33

second connection line

35

regenerant

37

intermediate line

39

filling valve

41

feed

43

supply line

45

cover

47

container opening

49

threaded sleeve

51

ring wall

53

spigot

55

valve seat

57

sealing washer

59

blocking body

61

locking lugs

63

annulus

Claims (13)

Dishwasher, in particular household dishwasher, at least one rinsing container (1) for receiving items to be cleaned and / or dried and a feed line (41) for conducting water into the rinsing container (1), wherein the outlet end of the feed line (41) is arranged above the operating filling level of the dishwasher, characterized in that a container opening (47) for performing the supply line (41) through a wall of the washing container (1) is arranged below the Betriebsfüllniveaus. Dishwasher according to claim 1, characterized in that through the container opening (47) extends a supply line (43) for supplying a softening device (25) for softening water with at least one regenerating agent, in particular regenerating salt. Dishwasher according to claim 1 or 2, characterized in that the supply line (41) is associated with at least one retaining means for blocking a directed from the washing container (1) liquid flow. Dishwasher according to claim 3, characterized in that the retaining means are arranged on a cover (45) which closes the end of the supply line (43). Dishwasher according to claim 4 or 5, characterized in that the retaining means are designed as a check valve. Dishwasher according to claim 3, characterized in that the retaining means comprise an outlet end of the supply line (41) designed as an overflow. Dishwasher according to claim 6, characterized in that a cover (45) closing off the end of the supply line (43) covers the overflow. Dishwasher according to one of claims 1 to 7, characterized in that the supply line (43) and the supply line (41) at least partially, in particular in the passage area in the washing compartment (1), are arranged parallel to each other. Dishwasher according to one of claims 1 to 8, characterized in that the supply line (43) and the supply line (41) at least partially, in particular in the passage area in the washing compartment (1) are arranged concentrically to each other. Dishwasher according to one of claims 1 to 9, characterized in that the supply line (43) and the supply line (41) at least partially, in particular in the passage area in the washing compartment (1), are arranged to extend in the direction of gravity. Dishwasher according to one of claims 1 to 10, characterized in that the container opening (47) in the bottom of the washing compartment (1) is arranged. Dishwasher according to one of claims 2 to 11, characterized in that the softening device is arranged below the washing compartment (1). Dishwasher according to one of claims 5 to 12, characterized in that the check valve has a displaceable locking body (59), the gravity of the feed of the supply line (41) closes and / or is pressed by a spring element in its closed position.

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